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JEE
Ask a question
Sujata Patil
asked
• 7 minutes ago
The expression
is a polynomial in x of degree
a)
7
b)
5
c)
4
d)
3
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Mansi Behl
asked
• 7 minutes ago
Which one of the following solutions of sulphuric acid will exactly neutralise 25 ml of 0.2 M sodium hydroxide solution ?
a)
12.5 ml of 0.1 M solution
b)
25 ml of 0.1 M solution
c)
25 ml of 0.2 M solution
d)
50 ml of 0.2 M solution
Correct answer is option 'B'. Can you explain this answer?
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Kuldeep Prajapati
asked
• 11 minutes ago
A bullet losses 1/n of its velocity in passing through a plank. What is the least no. Of planks required to stop the bullet? (assume constant acceleration)?
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Answer
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Ashish Rout
asked
• 12 minutes ago
Two swimmers leave point A to point B lying right across on the other bank. One of them crosses the river along the straight line AB while the other swims at right angles to the stream and then walks the distance that he has
...
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been carried away by the stream to get to point B. What was the velocity u of his walking if both swimmers reached the destination simultaneously? The stream velocity v0 = 2.0 km/hour and the velocity if of each swimmer with respect to water equals 2.5 km per hour.?
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Mansi Behl
asked
• 24 minutes ago
The solution set for | x | > 7
a)
(7 , ∞)
b)
(−∞,−7) ∪ (7,∞)
c)
(−∞,−7) ∩ (7,∞)
d)
none of these
Correct answer is option 'B'. Can you explain this answer?
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Answer
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Jp Rajesh
asked
• 33 minutes ago
Two identical small spheres each of mass 'm' and and identical charge which decreases as they approach each other with approach velocity (relative velocity) of 'c/√x' , c being a positive constant and x is the separation betw
...
more
een the spheres . 'F' capital of in the figure is a constant external force. Neglect the gravitational force. The separation between the spheres at which the leakage rate of charge by spheres becomes infinity. {Given:(mc^2)/F}?
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Anjali Khadse
asked
• 38 minutes ago
A car is taking turn on a circular path of radius R.if the coefficient of friction between the tyres and road is u,the maximum velocity for no slipping is?
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Mohit Goyal
asked
• 40 minutes ago
Find the equation of the straight line joining the foci of the ellipse x2/25 5 y2/16 =1 to the foci of the ellipse x2/24 y2/49=1 find the area of the figure formed by the foci of these two ellipse?
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Yaswanth Battina
asked
• 44 minutes ago
The number of solutions of x belongs to [0,2π] satisfying the equation 4(cos^10x sin^2x)=4+ sin^2xsin^2(2x) ?
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Answer
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Shubham Choudhary
asked
• 54 minutes ago
A bullet hits and gets embedded in a solid block resting on a frictionless surface. In this process which one of the following is correct ?
a)
only momentum is conserved
b)
only kinetic energy is conserved
c)
neither momentum nor kinetic energy is conserved
d)
both momentum and kinetic energy are conserved
Correct answer is option 'A'. Can you explain this answer?
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Answer
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Karan
asked
• 54 minutes ago
Can you explain the answer of this question below:
An electric kettle has two heating coils. When one of the coils is connected to an ac source the water in the kettle boils in 10 minutes. When the other coil is used the water boils in 40 minutes. If both the coils are connected in parallel, the time taken by the same quantity of water to boil will be
A:
4 min
B:
25 min
C:
15 min
D:
8 min
The answer is d.
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Answer
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Mansi Behl
asked
• 58 minutes ago
Among the following reactions of hydrogen with halogens, the one that requires a catalyst is :
a)
H
2
+ I
2
→ 2HI
b)
H
2
+ F
2
→ 2HF
c)
H
2
+ Cl
2
→ 2HCI
d)
H
2
+ Br
2
→ 2HBr
Correct answer is option 'A'. Can you explain this answer?
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Rohit Joshi
asked
• 1 hour ago
The radius of blade of fan is 0.3m. it is making 1200 rpm. the acceleration of particle at the tip of balde is?? a)1600ms^-2. b)4740ms^-2 correct option is b?
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Answer
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Muhammed Salman P M
asked
• 1 hour ago
If cos
-1
(x/a)+cos
-1
(y/b)=α, then (x
2
/a
2
)-(2xy/ab)cosα+(y
2
/b
2
)=
a)
sin
2
α
b)
cos
2
α
c)
tan
2
α
d)
cot
2
α
Correct answer is option 'C'. Can you explain this answer?
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Answer
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Abhijeet Kumar
asked
• 1 hour ago
A wheel of radius one metre is spinning with angular velocity which vary with time as 5t² rad/s. The acceleration of the point on the wheel's rim at t=1s has magnitude of A.5√29 B.25?
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Answer
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Navya Kaur
asked
• 1 hour ago
An isotropic source of 2 candela produces a light flux equal to
a)
2
b)
4
c)
6
d)
8
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Kumari Sakshi
asked
• 1 hour ago
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion (A):
Reason (R): The non zero vectors
are always linearly independent
a)
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
b)
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion.
c)
Assertion is true but Reason is false.
d)
Assertion is false but Reason is true.
Correct answer is option 'A'. Can you explain this answer?
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Gulipalli Kamala
asked
• 1 hour ago
If y=f(x) satisfy y(x+y3)dx=x(y3-x)dx and f(4)=-2 then find f(x)?
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Nikki Sharma
asked
• 1 hour ago
Magnesium metal crystallizes in a face centred cubic lattice with edge length 0.58nm . Calculate the density of metal if it contains 0.6% frenkel defect and 0.3% Schottky defect?
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Varsha Saini
asked
• 1 hour ago
Sun of cofficient of integral power of x in binomial expansion of (1-2√x) ^50 is?
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Prajwal Yaligar
asked
• 1 hour ago
A beam of electromagnetic radiation of intensity 6.4 × 10^(–5) W/cm2 is comprised of wavelength,lambda= 310 nm. It falls normally on a metal (work function = 2eV) of surface area of 1 cm2. If one in10^3 photons ejects an electron, total number of electrons ejected in 1 s is 10^x . (hc = 1240 eVnm,1eV =
Correct answer is '11'. Can you explain this answer?
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Arunima Mishra
asked
• 1 hour ago
Vector v1=ai^ bj^ ck^ makes an angle 60 with vector v2=i^ j^ √2k^ then find number of value of theta between 0to360?
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Isha Mohadikar
asked
• 1 hour ago
The line Ax+By+C=0 will touch the circle x²+y²=lambda when
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Beyond the Horizon
asked
• 1 hour ago
What is CDS and FDS is discharge tube experiment?
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Answer
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Mansi Behl
asked
• 2 hours ago
On increasing the temperature of a substance gradually, which of the following colours will be noticed by you
a)
White
b)
Yellow
c)
Green
d)
Red
Correct answer is option 'C'. Can you explain this answer?
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Answer
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Nitesh Chandra
asked
• 2 hours ago
If f(log(√l x √x)=x2 then find the value of f(x)?
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Answer
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Jejem Kip
asked
• 2 hours ago
The number of molecules of pyruvic acid formed from one molecule of glucose at the end of glycolysis is
a)
1
b)
2
c)
3
d)
4
Correct answer is option 'B'. Can you explain this answer?
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Answer
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sairao allada
asked
• 2 hours ago
The solution of
a)
b)
c)
d)
Correct answer is option 'B'. Can you explain this answer?
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Answer
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Priyanka Maharana
asked
• 2 hours ago
(x-1)|x 1|cosx>0 for x€{-π,π}?
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Answer
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Santosh Srivastava
asked
• 2 hours ago
A small circular loop having current parallel to the current in the solenoid wires is placed symmetrically?
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Answer
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Deepshikha
asked
• 2 hours ago
The system shown in the figure released from rest. Find: Displacement of particle. Displacement of wedge. Displacement of COM of particle and of wedge system in the internal . The particle reaches the bottom of the wedge?
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Mansi Behl
asked
• 2 hours ago
By solving the inequality 3(a - 6) < 4 + a, the answer will be
a)
a < 9
b)
a < 12
c)
a < 13
d)
a < 11
Correct answer is option 'D'. Can you explain this answer?
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Arghyadeep Das
asked
• 2 hours ago
A smooth tube in the form of a semicircle of radius R is kept vertical.A non viscous liquid is in equilibrium subtending an angle 2 theta at the centre C of the circle.Find the frequency of small oscillations of the liquid.?
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Ram Mohith
asked
• 2 hours ago
For r = 0, 1, ...., 10 let A
r
, B
r
, C
r
denote, respectively, the coefficient of x
r
in the expansions of (1 + x)
10
, (1 + x)
20
and (1 + x)
30
. Then
is equal to [JEE 2010]
a)
B
10
- C
10
b)
c)
0
d)
C
10
- B
10
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Shivam Singh
asked
• 2 hours ago
Vapour pressure of a liquid is 10 mm at 300 K, 20 mm at 400 K. What is the vapour pressure at 500 K?
a)
25 mm
b)
40 mm
c)
27.8 mm
d)
30.3 mm
Correct answer is option 'A'. Can you explain this answer?
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Answer
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P Manoj Kumar
asked
• 2 hours ago
The length of the project ion of the line segment joining the points (5, -1, 4) and (4, -1, 3) on the plane, x + y + z = 7 is:
a)
b)
c)
d)
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Srinidhi Goudar
asked
• 2 hours ago
Young’s modulus is also known as…………
a)
Bulk modulus
b)
Elastic modulus
c)
Modulus of rigidity
d)
None of these
Correct answer is option 'B'. Can you explain this answer?
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Answer
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Abhishek Singh
asked
• 2 hours ago
Solve 4^(-x 0.5)-7.2^(-x)<4?>4?>
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Answer
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Ram Mohith
asked
• 2 hours ago
The inequalities y(-1) ≥ -4, y(1) ≤ 0, y(3) ≥ 5 are know to hold for y = ax² + bx + c. Find the least value of 'a'?
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Ritesh Sinha
asked
• 2 hours ago
The ratio of the radius of earth to that of moon is 11. The ratio of acceleration due to gravity on the earth and on the moon is 6. The ratio of the square velocity from the Earth surface to that from the moon is?
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Mansi Behl
asked
• 2 hours ago
The total expenditure incurred by an industry under different heads is best presented as a
a)
bar diagram
b)
pie diagram
c)
histogram
d)
frequency polygon
Correct answer is option 'B'. Can you explain this answer?
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Shan Singh
asked
• 2 hours ago
A point charge q is placed in space. Consider an arbitrary shaped Gaussian surface which is divided into two parts I and II by an imaginary plane as shown in figure. For this situation mark out the correct statement(s).
a)
Electric flux crossing through II is +ve and through I is -ve.
b)
Electric flux crossing through II is -ve and through I is +ve.
c)
Electric flux through I and II are equal and opposite.
d)
Both (b) and (c) are correct.
Correct answer is option 'D'. Can you explain this answer?
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Mansi Behl
asked
• 2 hours ago
Nucleic acids are called acids mainly because of the presence of
a)
–COOH group
b)
–OH group of the sugar unit
c)
–OH goup of the heterocyclic base
d)
–OH group of the phosphate unit
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Ayomide Attah
asked
• 3 hours ago
If x>1 then prove that arcsin(x)= -i(In(i√(x^2-1)+xi)?
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Answer
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Awantika Gupta
asked
• 3 hours ago
tert-Butyl methyl ether on heating with HI of one molar concentration gives
a)
CH₃OH +(CH₃)₃CI
b)
CH₃I +(CH₃)₃COH
c)
CH₃I +(CH₃)₃CI
d)
None of these
Correct answer is option 'A'. Can you explain this answer?
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Answer
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Nalini Reddy
asked
• 3 hours ago
The Quartile Deviation of the daily wages (in Rs) of 7 persons given below :
12, 7, 15, 10, 17, 19, 25 is
a)
14.5
b)
5
c)
9
d)
4.5
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Shashi Singh
asked
• 3 hours ago
If p , x
1
, x
2
, … x
i
… and q , y
1
, y
2
, … y
i
… are in A.P., with common difference a and b respectively, then the centre of mean position of the points A
i
(x
i
, y
i
) where i = 1, 2, ..., n lies on the line
a)
ax − by = aq − bp
b)
bx − ay = ap − bq
c)
bx − ay = bp − aq
d)
ax − by = bq − ap
Correct answer is option 'C'. Can you explain this answer?
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Manpreet Kalra
asked
• 3 hours ago
Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I, would be
a)
[ML
2
T -3 I
-1
]
b)
[ML
2
T
-2
]
c)
[ML
2
T
-1
I
-1
]
d)
[ML
2
T
-3
I
-2
]
Correct answer is option 'D'. Can you explain this answer?
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Mansi Behl
asked
• 3 hours ago
Some polar crystal produce small electric current on heating. This phenomenon is called
a)
Piezo electricity
b)
Pyro electricity
c)
Ferro electricity
d)
Anti ferroelectricity
Correct answer is option 'B'. Can you explain this answer?
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Answer
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Lakshadeep Velip
asked
• 3 hours ago
Wt is spontaneous and non spontaneous entropy?
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Danish Wajahath Wajahath
asked
• 3 hours ago
One end of a spring of negligible unstretched length and spring constant k is fixed at the origin (0,0). A point particle of mass m carrying a positive charge q is attached at its other end. The entire system is kept on a smooth horizontal surface. When a point dipole
pointing towards the charge q is fixed at the origin, the spring gets stretched to a length l and attains a new equilibrium position (see figure below). If the point mass is now displaced slightly by Δl ≪ l from its equilibrium position and released, it is found to oscillate at frequency
The value of δ is ______.-
Correct answer is '3.14'. Can you explain this answer?
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Answer
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Mansi Behl
asked
• 3 hours ago
200 g water is heated from 40°C to 60°C. Ignoring the slight expansion of water, the change in its internal energy is close to (Given specific heat of water=4184 J/kg/K) :
a)
8.4 kJ
b)
4.2 kJ
c)
16.7 kJ
d)
167.4 kJ
Correct answer is option 'C'. Can you explain this answer?
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Answer
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Prince Bhoria
asked
• 3 hours ago
Afflux of one metre Weber passes through a strip having an area is equal to 0. 0 to metre square the plane of the strip is at the angle of 60 degree to the direction of a uniform will be the value of B is ?
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Anurag G
asked
• 3 hours ago
√x/√a+√a/√x = y ,then prove that x/a+a/x = dy/dx
Related:
NCERT Solutions - Continuity & Differentiability, Exercise 5.3Maths
?
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Answer
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Manish Gajjala
asked
• 3 hours ago
The minimum value of 16tan power 2 x 25 cos power 2x/32 is?
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Mansi Behl
asked
• 3 hours ago
In an Young's double slit experiment setup, as shown in the figure, the light source executes simple harmonic motion between
P
and
Q
according to the equation x = Asinωtx,
s
being the mean position. Assume d→O and A≪L. ω is small enough to neglect Doppler effect. If the source were stationary at
s
, intensity at
O
would be
I
0
.
Q. The fractional change in intensity of the central maximum as function of time is
a)
Asinwt/L
b)
2Asinwt/L
c)
3Asinwt/L
d)
4Asinwt/L
Correct answer is option 'B'. Can you explain this answer?
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Answer
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Pratishtha Manjarekar
asked
• 3 hours ago
How to draw Lewis structure?
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Answer
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Sherine Horo
asked
• 3 hours ago
Axis of the parabola x
2
− 3 y − 6 x + 6 = 0 is
a)
x = − 3
b)
y = − 1
c)
x = 3
d)
y = 1
Correct answer is option 'C'. Can you explain this answer?
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Answer
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Salman Hussain
asked
• 4 hours ago
Two simple pendulums of equal lengths and equal bob masses are hung from same point. When strings of pendulums are displaced from vertical positions, by angles q1 and q2 and released, they make elastic collisions with each ot
...
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her in subsequent motion. Neglecting sizes of bobs of pendulums and assuming q1 and q2 are small enough to hold approximation sinq = q, mark the CORRECT alternative.?
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Answer
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Amrish Kumar Pandey A
asked
• 4 hours ago
Select incorrect statements(s):
a)
Electron-withdrawing inductive effect of the carbonyl group in -COOH group weakens the O-H bond and favours ionisation of a carboxylic acid compared with an alcohol
b)
Inductive effect of the chlorine destabilises the acid and stabilises the conjugate base
c)
Aniline is a weaker base than ammonia
d)
Phenol is a weaker acid than water
Correct answer is option 'A'. Can you explain this answer?
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Mishika Jaiswal
asked
• 4 hours ago
The parametric equations of a curve traced by a projectile on a certain planet with no surrounding are given by :y = (8t-5t
2
) metre and x = 6t metre, where t is in seconds. The velocity with which the projectile is projected, is
a)
6 m−s⁻
1
b)
8 m−s⁻
1
c)
10 m−s⁻
1
d)
16 m−s⁻
1
Correct answer is option 'C'. Can you explain this answer?
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Answer
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Manish Yadav
asked
• 4 hours ago
(9/10)x=_x+1-(x)2 the real roots?
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Mansi Behl
asked
• 4 hours ago
sp
3
d
2
hybridization is not displayed by :
a)
BrF
5
b)
SF
6
c)
[CrF
6
]
3−
d)
PF
5
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Mansi Behl
asked
• 4 hours ago
Which one among the following is the strongest reducing
agent ?
a)
Ethanoic acid
b)
Methanoic acid
c)
Benzoic acid
d)
Carbolic acid
Correct answer is option 'D'. Can you explain this answer?
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Mansi Behl
asked
• 4 hours ago
The area contained between the curve x y = a
2
, the vertical line
x = a, x = 4a (a > 0)
and
x
-axis is
a)
a
2
log 2
b)
2a
2
log 2
c)
a log 2
d)
2a log 2
Correct answer is option 'B'. Can you explain this answer?
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Answer
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Abhishek Suman
asked
• 4 hours ago
The number of five digit five digit numbers that can be formed using all the digits 0, 1, 3. 6, 8 which a number e by 4 is 30 (A) divisible (B) greater than 30,000 and divisible by 11 is 12 (C) smaller than 60,000 when digit
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8 always appears at ten's place is 6 (D) between 30,000 and 60,000 and divisible by 6 is 18.
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Kusum Kumari
asked
• 4 hours ago
For the reaction A→B, the rate law expression is rate = k[A]. Which of the following statements is incorrect?
a)
The reaction follows first order kinetics
b)
The t₁∕₂ of reaction depends on initial concentration of reactants
c)
k is constant for the reaction at a constant temperature
d)
The rate law provides a simple way of predicting the conc. of reactants and products at any time after the start of the reaction
Correct answer is option 'B'. Can you explain this answer?
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Answer
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Dipti Singla
asked
• 4 hours ago
What is v and r(t) graph in static charge?
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Answer
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Mansi Behl
asked
• 4 hours ago
The solution set for :
a)
(−∞,−2) ∪ (−1,1) ∪ (2,∞)
b)
(−∞,−2) ∪ (2,∞)
c)
(-2 , 2)
d)
(−1,2) ∪ (3,∞)
Correct answer is option 'A'. Can you explain this answer?
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Answer
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Mansi Behl
asked
• 4 hours ago
The tendency to form complex compounds is maximum for
a)
normal elements
b)
transition elements
c)
inner-transition elements
d)
metals containing full d-orbitals
Correct answer is option 'B'. Can you explain this answer?
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Answer
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Nushh Dixit
asked
• 4 hours ago
In a triangle ABC, 2sinAcosB 2sinBcosC 2sinCcosA=SinA SinB Sin C Then triangle ABC is ?
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Rajesh Arora
asked
• 4 hours ago
A small bob of mass m=.01kg is hanging from the roof of a moving car in equilibrium making angle theta with vertical. If initial velocity of car was zero and acceleration of car is 2ms^-2.find work sink done by tension in gro
...
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und frame in first 10 seconds.?
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Mansi Behl
asked
• 4 hours ago
The locus of the point of intersection of the straight lines,
tx−2y−3t=0
x−2ty+3=0 (t ∈ R), is :
a)
an ellipse with eccentricity 2/√5
b)
an ellipse with the length of major axis 6
c)
a hyperbola with eccentricity √5
d)
a hyperbola with the length of conjugate axis 3
Correct answer is option 'B'. Can you explain this answer?
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Priya Singh
asked
• 4 hours ago
The equation xy = 0 in three dimensional space represents
a)
a pair of parallel lines
b)
a pair of planes at right angles
c)
a plane
d)
a pair of straight lines
Correct answer is option 'B'. Can you explain this answer?
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Rad Atef Atef
asked
• 5 hours ago
Match the ligand to the number of electrons available for bonding to metal which pair is correct?
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Answer
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Utkarsh Oggy
asked
• 5 hours ago
Integration of (((a cos x) b)÷((a ( b cos x))^2)?
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Answer
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Jai Prakash
asked
• 5 hours ago
Which is not the correct statement for ionic solids in which positive and negative ions are held by strong electrostatic attractive forces?
a)
The radius r +/r - increases as coordination number increases
b)
As the difference in size of ions increases coordination number increases
c)
When coordination number is eight, the r +/r - ratio lies between 0.225 to 0.414
d)
In ionic solid of the type AX(ZnS, Wurtzite) the coordination number of Zn 2+ and S 2- respectively are 4 a
Correct answer is option 'C'. Can you explain this answer?
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Mansi Behl
asked
• 5 hours ago
Which one of the following complexes will consume more equivalents of aqueous solution of Ag(NO
3
) ?
a)
Na
3
[CrCl
6
]
b)
[Cr(H
2
O)
5
Cl]Cl
2
c)
[Cr(H
2
O)
6
]Cl
3
d)
Na
2
[CrCl
5
(H2O)]
Correct answer is option 'C'. Can you explain this answer?
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Nikhil Shukla
asked
• 5 hours ago
In a rotating disc mass m and angular speed* omega. if mass is doubled then effect on omega?
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Archit Khandelwal
asked
• 5 hours ago
The of first P terms of an ap is Q and the sum of Q term is P find the sum of first P Q term?
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Danish Wajahath Wajahath
asked
• 5 hours ago
Choose the correct statement(s) among the following :
a)
[FeCl
4
]
–
has tetrahedral geometry.
b)
[Co(en)(NH
3
)
2
Cl
2
]
+
has 2 geometrical isomers.
c)
[FeCl
4
]
–
has higher spin-only magnetic moment than [Co(en)(NH
3
)
2
Cl
2
]
+
.
d)
The cobalt ion in [Co(en)(NH
3
)
2
Cl
2
]
+
has sp
3
d
2
hybridization.
Correct answer is option 'A,C'. Can you explain this answer?
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sairao allada
asked
• 5 hours ago
The value of 0.234 is
a)
232/990
b)
232/9990
c)
232/9900
d)
232/9909
Correct answer is option 'A'. Can you explain this answer?
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Mansi Behl
asked
• 5 hours ago
Which one of the following is not made of soft iron
a)
Electromagnet
b)
Core of transformer
c)
Core of dynamo
d)
Magnet of loudspeaker
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Aarohi Goel
asked
• 5 hours ago
If f(x)=[ sin2x-tan2x/(ex-1)x² if x is not equal to 0 K if x=0 is continuous at x=0 find the absolute value of K?
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Answer
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Raghuvar Gautam
asked
• 5 hours ago
Bond energy of ozone is 480 kj per mole wavelength of light is62nm falls what is kinetic energy?
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Answer
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Shahana Nahasha
asked
• 5 hours ago
Which of the following is not a source of drug?
a)
Papaver somniferum
b)
Cannabis sativus
c)
Aconitum napellus
d)
Dalbergia sissoo
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Vikas Saini
asked
• 5 hours ago
The parametric coordinates of any point on the parabola y
2
= 4ax can be
a)
(at
2
, 2at)
b)
(at
2
, –2at)
c)
(asin
2
t, 2asint)
d)
(asint, 2acost)
Correct answer is option 'A,B'. Can you explain this answer?
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Answer
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Suman Pattanayak
asked
• 5 hours ago
Needed a Document for Vaporisation?
Related:
Chemistry for JEE Advanced
?
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Answer
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Anagha Mohan
asked
• 5 hours ago
Which one is not a part of a stair case?
a)
Baluster
b)
Nosing
c)
Peak
d)
Newel
Correct answer is option 'C'. Can you explain this answer?
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Answer
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Sourav Mishra
asked
• 5 hours ago
reacts with
as
The change in oxidation number of Cr is
a)
6
b)
3
c)
zero
d)
4
Correct answer is option 'C'. Can you explain this answer?
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Answer
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Parul Agrahari
asked
• 5 hours ago
Consider the following statements:
Assertion (A) : The internal energy of an ideal gas does not change during an isothermal process
Reason (R) : The decrease in volume of a gas is compensated by a corresponding increase in pressure when its temperature is held constant
Of these statements :
a)
Both A and R are true and R is the correct explanation of A
b)
Both A and R are true and R is not the correct explanation of A
c)
A is true but R is false
d)
A is false but R is true
Correct answer is option 'B'. Can you explain this answer?
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Vinod Kumar
asked
• 6 hours ago
If I = integration of (x dx / 1 + sin2x + cos2x ) from limit 0 to π/4 . I = π ln2/b . Then find b ?
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Shubham Rajput
asked
• 6 hours ago
In this letter series, some of the letters are missing. Choose the correct letter given below -
a _ bccb _ ca _ cca _ baab _ c
a)
ababc
b)
abcaa
c)
accab
d)
bacaa
Correct answer is option 'A'. Can you explain this answer?
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Answer
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Aman Yadav
asked
• 6 hours ago
The foci of the ellipse
+
= 1 and the hyperbola
_
=
coincide. Then the value of b
2
is-
[AIEEE 2003]
...
more
a)
9
b)
1
c)
5
d)
7
Correct answer is option 'D'. Can you explain this answer?
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Moin Khan
asked
• 6 hours ago
From a light house an observer observers two ship A and B ship A proceeding towards north at speed 20√2km/h and ship B proceeding towards north east a speed of 20km/h find in which direction and at what speed the ship B would
...
more
appear to move to an standing on the deck if the ship A?
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Answer
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Mansi Behl
asked
• 6 hours ago
In the Serepeck process, the bauxite ore is treated
with
a)
b)
NaOH
c)
d)
Correct answer is option 'C'. Can you explain this answer?
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Answer
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Saurav Agrawal
asked
• 6 hours ago
If lines ax2+2hxy+by2=0 be two sides ’
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Answer
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Sumana Basu
asked
• 6 hours ago
If the electric flux entering and leaving an enclosed surface respectively is φ
1
and φ
2
, the electric charge inside the surface will be
a)
φ
2
- φ
1
/ε
0
b)
φ
1
+ φ
2
/ε
0
c)
φ
1
- φ
2
/ε
0
d)
(φ
1
+ φ
2
)ε
0
Correct answer is option 'D'. Can you explain this answer?
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Answer
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Saklin Mostak
asked
• 6 hours ago
Bohrs model or electromagnetic theory maxwell is correct?
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Khushi Chudasama
asked
• 6 hours ago
The pulleys and strings shown in the figure are smooth and negligible mass for the system to remain in equilibrium the angle theta should be?
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