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JEE Main Mock - 8 (Previous Pattern)

90 Questions MCQ Test TEST | JEE Main Mock - 8 (Previous Pattern)

Description

This mock test of JEE Main Mock - 8 (Previous Pattern) for JEE helps you for every JEE entrance exam. This contains 90 Multiple Choice Questions for JEE JEE Main Mock - 8 (Previous Pattern) (mcq) to study with solutions a complete question bank. The solved questions answers in this JEE Main Mock - 8 (Previous Pattern) quiz give you a good mix of easy questions and tough questions. JEE students definitely take this JEE Main Mock - 8 (Previous Pattern) exercise for a better result in the exam. You can find other JEE Main Mock - 8 (Previous Pattern) extra questions, long questions & short questions for JEE on EduRev as well by searching above.

QUESTION: 1

The area bounded by the curves y = sin x between the ordinates x = 0, x = π and the x-axis is

A.
2 sq. units
B.
4 sq. units
C.
3 sq. units
D.
1 sq. units

Solution:

QUESTION: 2

The 10th term of the expansion of (x-1)¹¹ (in decreasing powers of x) is

A.
-x
B.
-11 x
C.
-x²
D.
-11C₂x²

Solution:

QUESTION: 3

x=7 touches the circle x² + y² - 4x - 6y - 12 = 0, then the co-ordinates of the point of contact are

A.
(7,3)
B.
(7,4)
C.
(7,8)
D.
(7,2)

Solution:

QUESTION: 4

The complex numbers 1,-1,i√3 form a triangle which is

A.
right angled
B.
isosceles
C.
equilateral
D.
right angled

Solution:

QUESTION: 5

The solution of

A.
2y = e^2x + c
B.
2ye^x = e^x + c
C.
2ye^x = e^2x + c
D.
2ye^2x = 2e^x + c

Solution:

QUESTION: 6

The volume of a solid which is obtained by revolving area bounded by an ellipse x²+9y²=9 and straight line x+3y=3 about y-axis is

A.
3π
B.
4π
C.
6π
D.
9π

Solution:

QUESTION: 7

The solution of the equation x(dy/dx)=y-xtan(y/x) is

A.
x sin(x/y)+c=0
B.
x siny+c=0
C.
x sin(y/x)=c
D.
none of these

Solution:

QUESTION: 8

where [x] denotes the greatest integer less than or equal to x, is continuous at x = 2, then the value of a is equal to

A.
− 1
B.
0
C.
1
D.
4

Solution:

QUESTION: 9

What is equal to?

A.
1 + i
B.
1 − i
C.
D.

Solution:

QUESTION: 10

If x/a + y/b = √2 touches the ellipse (x²/a²) + (y²/b²) =1, then its eccentric angle θ is equal to

A.
0º
B.
90º
C.
45º
D.
60º

Solution:

QUESTION: 11

A.
h(x)
B.
C.
logh(x)
D.
− log h x

Solution:

QUESTION: 12

If f(4)=4, f^'(4) = 3, then

A.
4
B.
3
C.
2
D.
1

Solution: Apply L'HOPITAL We get {f'(x)/2√f(x)}/{1/2√x} Now put x=4 => (3/2√4)/(1/2√4) => 3

QUESTION: 13

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): In the binomial expansion of (a-b)ⁿ , n ≤ 5, the sum of the 5th and 6th terms is zero, then
Reason(R): In the expansion of (x+y)ⁿ, (r+1) th term from the beginning is called the general term T_r+1 T_r+1 = ⁿC, x^n-r y^r

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.

Solution:

QUESTION: 14

Negation of "Sohan is in class X or Rani is in class XII" is

A.
Sohan is not in class X but Rani is in class XII.
B.
Sohan is not a class X and Rani is not in class XII.
C.
Either Ram is not in class X or Rani is not in class XII.
D.
None of these

Solution:

QUESTION: 15

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):The function
is increasing function.
Reason(R): A function f(x) is said to be an increasing function (or monotonically increasing) at an interval a < x < b, if for any two points x₁ and x₂ of the interval f(x₁) < f(x₂) when x₁ < x₂.

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.

Solution:

QUESTION: 16

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): A student is allowed to select at the most n books from a collection of (2n+1) books. If the total number of ways in which he can select a book is 63, then n is 3.
Reason(R): By the property of

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.

Solution:

QUESTION: 17

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): Equation of a straight line through the point (3,1,-6) and parallel to each of the two planes 2x - 3y + z + 5 = 0 and x + y + 2z = 2 is
Reason(R): The required line will be parallel to the line of intersection of the two planes.

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.

Solution:

QUESTION: 18

The number of solutions of 2x + y = 4, x - 2 y = 2, 3x + 5y = 6 is

A.
0
B.
1
C.
2
D.
infinitely many

Solution:

QUESTION: 19

Which of the deciles are less than first quartile?

A.
D₁ and D₃
B.
D₁ and D₂
C.
Both of these
D.
None of these

Solution:

QUESTION: 20

The pole of the straight line x − 2y + 4 = 0 with respect to the parabola y² = 6 x is

A.
(4, 6)
B.
− 4 , 6
C.
4, − 6
D.
− 4, − 6

Solution:

QUESTION: 21

If P(A∪B)=P(A∩B), then the relation between P(A) and P(B) is

A.
P(A) + P(B) = 2P(A∪B)
B.
P(A) + P(AB) = 2P(A)P(A/B)
C.
P(A) + P(B) = 2P(A)P(B/A)
D.
none of these

Solution:

QUESTION: 22

The numbers of all words formed from the letters of the word CALCUTTA is

A.
2520
B.
5040
C.
10,080
D.
40,320

Solution:

No of letter in the given word is 8
No of repeated word is "C" 2 times, "A" 2 times and "T" 2 times. So the equation is

QUESTION: 23

Minimum area of the triangle formed by any tangent to the ellipse with the coordinate axes is

A.
B.
C.
[ab]
D.

Solution:

QUESTION: 24

If log(a + c), log(c - a), log (a - 2b + c) are in A.P., then

A.
a, b, c are in A.P
B.
a², b², c² are in A.P
C.
a, b, c are in G.P
D.
a, b, c are in H.P.

Solution:

QUESTION: 25

In a binomial distribution, mean is 5 and the variance is 4. Then the number of trials is

A.
9
B.
20
C.
25
D.
125

Solution:

QUESTION: 26

The range of the function f (x) = cos [x], where (- π/2) < x < ( π/2), is

A.
{-1, 1, 0}
B.
{cos 1, 1, cos 2}
C.
{cos 1, -cos 1, 1}
D.
none of these

Solution:

QUESTION: 27

The angle between two diagonals of a cube is

A.
45º
B.
60º
C.
30º
D.
tan⁻¹(2√2)

Solution:

QUESTION: 28

The projection of vector 2i+3j-2k on i+2j+3k is

A.
1/√14
B.
2/√14
C.
3/√14
D.
none of these

Solution:

QUESTION: 29

The maximum value of sin θ cos θ is

A.
1
B.
1/2
C.
1/√2
D.
√3/2

Solution:

QUESTION: 30

If dot product of vectors (i+j+k) and the unit vector along the sum of vectors (2i+4j-5k) and (bi+2j+3k) is 1, the value of b is

A.
-2
B.
-1
C.
0
D.
1

Solution:

QUESTION: 31

The correct order of boiling points for primary (1º), secondary (2º) and tertiary (3º) alcohols is

A.
1º > 2º > 3º
B.
3º > 2º > 1º
C.
2º > 1º > 3º
D.
2º > 3º > 1º

Solution:

QUESTION: 32

The metal ion which is precipitated when H^₂S is passed with HCl is

A.
Zn²⁺
B.
Ni²⁺
C.
Cd²⁺
D.
Mn²⁺

Solution:

QUESTION: 33

The atomic mass of an atom is due to

A.
Electrons and protons
B.
Protons and neutrons
C.
Electrons and neutrons
D.
Electrons, protons and neutrons

Solution:

QUESTION: 34

The most reactive nucleophile among the following is

A.
CH₃O^-
B.
C₆H₅O^-
C.
(CH₃)₂CHO^-
D.
(CH₃)₃CO^-

Solution:

Although due to +I effect of methyl groups, (CH₃)₂ CHO and (CH₃)₃ CO are stronger bases but due to steric hindrance both are weaker nucleophiles than CH₃O
Further due to resonance, C₆H₅O

is the weakest nucleophile
CH₃O is most reactive (stronger) nucleophile

QUESTION: 35

Scurvy is caused due to deficiency of

A.
vitamin B₁₂
B.
vitamin B₂
C.
ascorbic acid
D.
glutamic acid

Solution:

QUESTION: 36

The molecule which has zero dipole moment is

A.
CH₂Cl₂
B.
BF₃
C.
NF₃
D.
ClO₂

Solution:

QUESTION: 37

Which of the following species is paramagnetic?

A.
O₂^-
B.
CN^-
C.
CO
D.
NO⁺

Solution:

QUESTION: 38

Which of the following will have the shape of trigonal bipyramid?

A.
PF₃Cl₂
B.
IF₅
C.
BrF₅
D.

Solution:

PF₃Cl₂ has triogonal bipyramidal geometry. IF₅, BrF₅ and have octahedral geometries with one position occupied by a lone pair of electrons.

QUESTION: 39

A reaction is not feasible ,if

A.
∆H is positive and ∆S is also positive
B.
∆H is positive and ∆S is negative
C.
∆H is negative and ∆S is also negative
D.
∆H is negative and ∆S is positive

Solution:

QUESTION: 40

The equilibrium between water and its vapour, in an open-vessel

A.
can be achieved
B.
depends upon pressure
C.
can not be achieved
D.
depends upon temperature

Solution:

In an open vessel, the water vapour diffuse into air and therefore, the concentration of water vapour above water surface is negligible.
The reverse process of condensation of vapour into liquid form is almost absent.
Therefore, evaporation process continues, till the entire water changes into vapour form.
Therefore, in an open vessel, the water vapour system is never in equilibrium.
Finally the whole water will diffuse into air as water vapour.

QUESTION: 41

The heat of combustion of graphite and carbon monoxide respectively are -393.5 kJ mol⁻¹ and -283 kJ mol⁻¹. Thus, heat of formation of carbon monoxide in kJ mol⁻¹ is

A.
+ 172.5
B.
- 110.5
C.
- 10760
D.
- 676.5

Solution:

QUESTION: 42

The rate of a reaction can be increased in general by all the factors except by

A.
using a catalyst
B.
increasing temperature
C.
increasing the activation energy
D.
increasing the conc. of reactants

Solution:

QUESTION: 43

A Carnot engine has an efficiency of 20%. If energy is fed into the engine at the rate of 1 kW, then the output of the engine is

A.
150 W
B.
200 W
C.
250 W
D.
300 W

Solution:

QUESTION: 44

Given

The heat of formation of

Solution:

QUESTION: 45

Which of the following IUPAC names is correct?

A.
2-Methyl-3-ethylpentane
B.
3-Ethyl-2-methylpentane
C.
2-Ethyl-3-methylpentane
D.
3-Methyl-2-ethylpentane

Solution:

QUESTION: 46

Eka-aluminium and eka-silicon are known as

A.
Gallium and Germanium
B.
Aluminium and silicon
C.
Iron and sulphur
D.
Proton and silicon

Solution:

Gallium and Germanium were unknown at the time when Mendeleev's periodic table was formulated. But Mendeleev's predicted the properties of these elements and named them eka-aluminium and eka-silicon. Later when these elements were discovered, their properties were found to be similar to those of aluminium and silicon.

QUESTION: 47

Which of the following system has maximum number of unpaired electrons?

A.
d⁶ (terahedral, high spin)
B.
d⁹ (octahedral)
C.
d⁴ (octahedral,low spin)
D.
d⁷ (octahedral, high spin)

Solution:

Distribution of d-electrons in weak field or high spin complex in tetrahedral field for d⁶ ion is thus there are four unpaired electrons.
d⁹ (octahedral) = no of unparied electron is one
d⁴ (octahedral, low spin) no of unpaired electron is one
d⁷ (octahedral, high spin) no of unparied electron is three.

QUESTION: 48

Which of the following has highest first ionization potential?

A.
Carbon
B.
Oxgyen
C.
Nitrogen
D.
Boron

Solution:

Nitrogen has highest first ionization potential. This is because N contains exactly half-filled p-orbitals which is extra stable. hence its first ionisation potential is high.
Electronic configuration of N:

QUESTION: 49

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

Solution:

QUESTION: 50

Which is the best description of the behaviour of bromine in the reaction: H₂O + Br₂ → HOBr + HBr?

A.
oxidizing agent
B.
reducing only
C.
proton acceptor only
D.
both oxidising and reducing

Solution:

QUESTION: 51

Conductivity (Unit:siemen's S) is directly proportionally to the area of the vessel and the concentration of the solution in it and is inversely proportional to the length of vessel,then the unit of constant of proportionally is

A.
S m mol⁻¹
B.
S m² mol⁻¹
C.
S⁻² m² mol
D.
S² m² mol⁻²

Solution:

QUESTION: 52

What is the temperature of hydrogen gas, which has the same r.m.s. velocity as that of oxygen at a temperature of 0ºC?

A.
273 ÷ 8 K
B.
273 X 8 K
C.
273 ÷ 32 K
D.
273 X 4 K

Solution:

QUESTION: 53

NH₃ has a much higher b.p. than PH₃ because

A.
NH₃ has a larger molecular weight
B.
NH₃ undergoes umbrella inversion
C.
NH₃ forms hydrogen bond
D.
NH₃ contains ionic bonds whereas PH₃ contains convalent bonds

Solution:

QUESTION: 54

If an isotope of hydrogen has two neutrons in its atoms,its atomic number and atomic mass number will respectively be

A.
2 and 1
B.
3 and 1
C.
1 and 1
D.
1 and 3

Solution:

QUESTION: 55

Which of the following compounds will be most easily attacked by an electrophile ?

Solution:

QUESTION: 56

Calcium acetate on heating results in

A.
Acetone
B.
Acetaldehyde
C.
Ethane
D.
Acetic anhydride

Solution:

QUESTION: 57

Most stable free radical is

Solution:

QUESTION: 58

CH₂═CHCH₃

undergoesfreeradicalsubstitutionusingNBS.Productformedis:

A.
CH₃CH═CHBr
B.
C.
CH₂═CHCH₂Br
D.

Solution:

QUESTION: 59

What amount of bromine will be required to convert 2 g of phenol into 2, 4, 6-Tribromophenol?

A.
4.00
B.
6.00
C.
10.22
D.
20.44

Solution:

QUESTION: 60

Consider the following statement:
"In a sample of butane at room temperature, none of the molecules will be in the least stable conformation".

A.
The above statement is true.
B.
The above statement is false. All of the indicated (anti-periplanar, anti-clinal, etc.) conformations of butane will be equally populated
C.
The above statement is false. All of the indicated conformations of butane will be populated, but the more stable ones will have smaller populations
D.
The above statement is false. All of the indicated conformations of butane will be populated, but the more stable ones will have larger populations

Solution:

The conformations of butane differ in their relative stabiliities. The anti-periplanar has minimum repulsion between the groups attached tetrahedrally to the two carbon atoms. In synclinal (gauche) conformations, methyl groups are so close that they repel each other, as a result is has 3.8 kJmol^-1 more energy than anti conformation. similarly, syn-periplanar is least stable having energy 18.4 kJ mol⁻¹ than anti conformation. Thus, at room temperature, the more stable ones will have larger populations.

QUESTION: 61

The ratio of minimum to maximum wavelength in Balmer series is

A.
5 : 9
B.
5 : 36
C.
1 : 4
D.
3 : 4

Solution:

From Bohr's theory for hydrogen atom

QUESTION: 62

In which of the following systems will the radius of the first orbit (n = 1) be minimum?

A.
doubly ionized lithium
B.
singly ionized helium
C.
deuterium atom
D.
hydrogen atom

Solution:

QUESTION: 63

Identify that set in which all the three sustances are good conductors of electricity

A.
Cu,Ag,Au
B.
Cu,Si, diamond
C.
Cu,Ag,Plastic
D.
Cu,Ge,wood

Solution:

QUESTION: 64

The power of an electric bulb marked as 40 W and 200 V used in a circuit of supply voltage 100 V will be

A.
100 W
B.
40 W
C.
20 W
D.
10 W

Solution:

QUESTION: 65

The curve drawn between velocity and frequency of photon in vacuum will be a

A.
Straight line parallel to frequency axis
B.
Straight line passing through origin and making an angle 45º with frequency axis
C.
Straight line parallel to velocity axis
D.
Hyperbola

Solution:

QUESTION: 66

When a charged oil drop moves upwards in an electric field, the electric force acting on the drop is

A.
Equal to the gravitational force
B.
Less than the garvitational force
C.
Greater than the mass of the oil drop
D.
Greater than the gravitational force

Solution:

QUESTION: 67

Out of the folowing statement which is NOT true?

A.
infrared radiations arise due to minor electron transitions in atoms
B.
infrared radiations are used for long distance photography
C.
sun is the natural source of infrared radiations
D.
Infrared radiations are detected by using a bolometer

Solution:

QUESTION: 68

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

A.
charge
B.
energy
C.
potential
D.
capacitance

Solution:

QUESTION: 69

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

A.
increases
B.
decreases
C.
becomes infinite
D.
remains unchanged

Solution:

QUESTION: 70

Which of the following statements is true

A.
g is same at all places on the surface of earth
B.
g has its maximum value at the equator
C.
g is less at the earth's surface than at a height above it or a depth below it
D.
g is greater at the poles than at the equator

Solution:

QUESTION: 71

If radius of the earth contracted 2% and its mass remains the same then weight of the body at the earth surface

A.
Will decrease
B.
Will increase
C.
Will remain the same
D.
None

Solution:

QUESTION: 72

On gradually, increasing the temperature of a substance, you will notice which of the following colour?

A.
red
B.
green
C.
yellow
D.
white

Solution:

QUESTION: 73

On a cold morning, a metal surface will feel colder to touch than a wooden surface because

A.
Metal has high specific heat
B.
Metal has high thermal conductivity
C.
Metal has low specific heat
D.
Metal has low thermal conductivity

Solution:

QUESTION: 74

A light string passing over a smooth light pulley connects two blocks of masses m₁ and m₂ (vertically). If the acceleration of the system is (g/8), then the ratio of masses is

A.
8:1
B.
9:7
C.
4:3
D.
5:3

Solution:

QUESTION: 75

The electric current in a circular coil of two turns produced a magnetic induction of 0.2T at its centre. The coil is unwound and is rewound into a circular coil of four turns. The magnetic induction at the centre of the coil now is, in tesla (if same current flows in the coil)

A.
0.2
B.
0.4
C.
0.6
D.
0.8

Solution:

QUESTION: 76

A body thrown with an initial speed of 96 ft/sec reaches the ground after (g=32 ft/sec²)

A.
3 sec
B.
6 sec
C.
12 sec
D.
8 sec

Solution:

QUESTION: 77

A simple pendulum of length l has a bob of mass m, with a charge q on it. A vertical sheet of charge, with surface charge density σ passes through the point of suspension. At equilibrium, the spring makes an angle θ with the vertical. its time period oscillations is T in this poisiton. Then

A.
tanθ=σq/2ε₀mg
B.
tanθ=σq/ε₀mg
C.
T>2π√l/g
D.
T=2π√l/g

Solution:

QUESTION: 78

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): If velocity-time graph is a straight line parallel to time axis, then acceleration of body is zero.
Reason(R): Acceleration is equal to rate of change of velocity (constant).

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.

Solution:

QUESTION: 79

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): A ball of mass m fails from a height and bounces back to same height. Contact force is equal to rate of change of momentum.
Reason(R): Contact force is upwards.

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.

Solution:

QUESTION: 80

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): Two blocks of masses m₁ and m₂ are at rest. They are moving towards each other under the mutual internal force. The velocity of centre of mass is zero.
Reason(R): If no external force acts on the system, then velocity of centre of mass is unchanged but can never be zero.

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.

Solution:

QUESTION: 81

In a plant a sucrose solution of coefficient of viscosity 0.0015 N s/m² is driven at a velocity of 10⁻²m/s through xylem vessels of radius 2 μ m and length 5 μ m. The hydrostatic pressure difference across the length of xylem vessels, in N/m² is

A.
5
B.
8
C.
10
D.
15

Solution:

QUESTION: 82

When red glass is heated in dark room, it will seem

A.
Green
B.
Purple
C.
Black
D.
Yellow

Solution:

QUESTION: 83

An object of weight W and density ρ is submerged in a fluid of density ρ₁. Its appearent weight will be

A.
W (ρ - ρ₁)
B.
(ρ - ρ₁)/W
C.
W (1- ρ₁/ρ)
D.
W (ρ₁ - ρ)

Solution:

QUESTION: 84

A mass M is moving with a constant velocity along a line parallel to x-axis. Its angular momentum with respect to origin or z-axis is

A.
Zero
B.
Remains constant
C.
Goes on increasing
D.
Goes on decreasing

Solution:

QUESTION: 85

A spring of force constant K is cut into two equal parts. Then the force constant of each piece is

A.
K
B.
K/2
C.
4K
D.
2K

Solution:

QUESTION: 86

Amplitude of vibration of any particle in a standing wave produced along a stretched string depends on

A.
Frequency of incident wave
B.
Time period of reflected wave
C.
Location of the particle
D.
Time of observation

Solution:

QUESTION: 87

Water falls from a height of 210 m. Assuming whole of energy due to fall is converted into heat the rise in temperature of water would be (J = 4.3 Joule/cal)

A.
42ºC
B.
49ºC
C.
0.49ºC
D.
4.9ºC

Solution:

QUESTION: 88

If the door of a refrigerator is kept open, then which of the following is true

A.
Room is cooled
B.
Room is heated
C.
Room is either cooled or heated
D.
Room is neither cooled nor heated

Solution:

QUESTION: 89

The difference in the lengths of a mean solar day and sidereal day is about

A.
1 min
B.
4 min
C.
15 min
D.
56 min

Solution:

QUESTION: 90

Which one of the following properties of light does not support wave theory of light?

A.
Light obeys laws of reflection and refraction.
B.
Light waves get polarised.
C.
Light shows photoelectric effect.
D.
Light shows interference.

Solution:

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90 Questions MCQ Test TEST | JEE Main Mock - 8 (Previous Pattern)

The area bounded by the curves y = sin x between the ordinates x = 0, x = π and the x-axis is

The 10th term of the expansion of (x-1)11 (in decreasing powers of x) is

x=7 touches the circle x2 + y2 - 4x - 6y - 12 = 0, then the co-ordinates of the point of contact are

x sin(x/y)+c=0

x siny+c=0

x sin(y/x)=c

none of these

Sohan is not in class X but Rani is in class XII.

Sohan is not a class X and Rani is not in class XII.

Either Ram is not in class X or Rani is not in class XII.

None of these

0

1

2

infinitely many

D₁ and D₃

D₁ and D₂

Both of these

None of these

P(A) + P(B) = 2P(A∪B)

P(A) + P(AB) = 2P(A)P(A/B)

P(A) + P(B) = 2P(A)P(B/A)

none of these

9

20

25

125

{-1, 1, 0}

{cos 1, 1, cos 2}

{cos 1, -cos 1, 1}

none of these

1/√14

2/√14

3/√14

none of these

1

1/2

1/√2

√3/2

-2

-1

0

1

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The 10th term of the expansion of (x-1)¹¹ (in decreasing powers of x) is

x=7 touches the circle x² + y² - 4x - 6y - 12 = 0, then the co-ordinates of the point of contact are