Class 11
Archaebacteria differ from eubacteria in?
Kalyani Mahadik answered • 3 hours agoArchaebacteria are older forms of bacteria known to exist during the asteroid collision in dinosaur age. They can survive in extremely harsh situations like Sulphur springs, snowy area, etc. Eubacteria or true bacteria include the recent forms of bacteria we study.
In side a hollow spherical shell- a)Everywhere gravitational potential is zero
- b)Everywhere gravitational field is zero
- c) Everywhere gravitational potential is same
- d)Everywhere gravitational field is same
Correct answer is option 'B,C,D'. Can you explain this answer?
In side a hollow spherical shell
a)
Everywhere gravitational potential is zero
b)
Everywhere gravitational field is zero
c)
Everywhere gravitational potential is same
d)
Everywhere gravitational field is same
Sai Kumar answered • 3 hours agoB and c are correct options
Deepak Kumar Anand asked • 23 minutes agoWhat is true about the compound calicene?
- a)It is highly soluble in water
- b)It exists mainly as dipolar ion with +ve charge in the three membered ring while -ve charge in five membered ring
- c)It exists mainly as dipolar ion with -ve charge in the three membered ring and +ve charge in five membered ring
- d)In solution it shows very high electrical conductivity
Correct answer is option 'A,B,D'. Can you explain this answer?
What is true about the compound calicene?
a)
It is highly soluble in water
b)
It exists mainly as dipolar ion with +ve charge in the three membered ring while -ve charge in five membered ring
c)
It exists mainly as dipolar ion with -ve charge in the three membered ring and +ve charge in five membered ring
d)
In solution it shows very high electrical conductivity
Typhlosole in earthworm begins from which segment :-[CPMT- 79 ]- a)15
- b)9
- c)26
- d)27
Correct answer is option 'D'. Can you explain this answer?
Typhlosole in earthworm begins from which segment :-
[CPMT- 79 ]
a)
15
b)
9
c)
26
d)
27
Rising Shadow answered • 5 hours agoAccording to Ncert its given that typhosole begins from anterior end of 27 segment and increases absorptive surface area
Molar specific heat of substance denoted by symbols C does not depend on?
Sunil Bhusare answered • 5 hours agoNature of substance ..... It only depends on heat, temperature change, moles.
Sarosij Sen Sarma asked • 37 minutes agoA vertical cylindrical container of base area A and upper cross-section area A1 making an angle 30° with the horizontal is placed in an open rainy field as shown near another cylindrical container having same base area A. The ratio of rates of collection of water in the two containers will be. 
- a)
- b)
- c)2
- d)None
Correct answer is option 'C'. Can you explain this answer?
A vertical cylindrical container of base area A and upper cross-section area A1 making an angle 30° with the horizontal is placed in an open rainy field as shown near another cylindrical container having same base area A. The ratio of rates of collection of water in the two containers will be.
a)
b)
c)
2
d)
None
What is lateral meristem?
Yashika Singh answered • 5 hours agoThe lateral meristem is a type of meristem that occurs at the lateral areas of the plant. Thus, it is responsible for the secondary growth of plant, i.e. the increase in girth.
Which dye is best suited for staining of chromosome ?
Yashika Singh answered • 5 hours agoCarmine is the basic dye used to stain nucleic acid and chromosomes and imparts pink colour to them
Rashmi Saxena asked • 43 minutes agoTwo gases X and Y kept in separate cylinders with same initial temperature and pressure are compressed to one third of their volume through isothermal and adiabatic process respectively. Which gas would have more pressure?- a)Gas X has higher temperature
- b)Gas Y has lower pressure
- c)Gas Y has higher pressure
- d)Gas X and Y are at 0 atm pressure
Correct answer is option 'C'. Can you explain this answer?
Two gases X and Y kept in separate cylinders with same initial temperature and pressure are compressed to one third of their volume through isothermal and adiabatic process respectively. Which gas would have more pressure?
a)
Gas X has higher temperature
b)
Gas Y has lower pressure
c)
Gas Y has higher pressure
d)
Gas X and Y are at 0 atm pressure
Arjun Singh asked • 58 minutes agoAt t= 0, a transverse wave pulse travelling in the positive x direction with a speed of 2 m/s in a wire is described by the function y = 6/x2 given that x ≠ 0. Transverse velocity of a particle at x = 2 m and t = 2 s is - a)3 m/s
- b)-3 m/s
- c)8 m/s
- d)-8 m/s
Correct answer is option 'B'. Can you explain this answer?
At t= 0, a transverse wave pulse travelling in the positive x direction with a speed of 2 m/s in a wire is described by the function y = 6/x2 given that x ≠ 0. Transverse velocity of a particle at x = 2 m and t = 2 s is
a)
3 m/s
b)
-3 m/s
c)
8 m/s
d)
-8 m/s
Abishek Karthik asked • 1 hour agoA body A of mass M while falling vertically downwards under gravity breaks into two parts; a body B of mass 
M and, a body C of mass M. The centre of mass of bodies B and C taken together shifts compared to that of body A towards [AIEEE 2005]- a)Depends on height of breaking
- b)Does not shift
- c)Body C
- d)Body B
Correct answer is option 'B'. Can you explain this answer?
A body A of mass M while falling vertically downwards under gravity breaks into two parts; a body B of mass M and, a body C of mass M. The centre of mass of bodies B and C taken together shifts compared to that of body A towards
M and, a body C of mass M. The centre of mass of bodies B and C taken together shifts compared to that of body A towards [AIEEE 2005]
a)
Depends on height of breaking
b)
Does not shift
c)
Body C
d)
Body B
Puneet Goel asked • 1 hour agoIn the Haber process for the industrial manufacture of ammonia involving the reaction, 
atm pressure in the presence of a catalyst a temperature of about 500°C is used. This is considered as optimum temperature for the process because - a) yield is maximum at this temperature
- b) catalyst is active only at this temperature
- c)energy needed for the reaction is easily obtained at this temperature
- d)rate of the catalytic reaction is fast enough while the yield is also appreciable for this exothermic reaction at this temperature.
Correct answer is option 'A'. Can you explain this answer?
In the Haber process for the industrial manufacture of ammonia involving the reaction, atm pressure in the presence of a catalyst a temperature of about 500°C is used. This is considered as optimum temperature for the process because
atm pressure in the presence of a catalyst a temperature of about 500°C is used. This is considered as optimum temperature for the process because a)
yield is maximum at this temperature
b)
catalyst is active only at this temperature
c)
energy needed for the reaction is easily obtained at this temperature
d)
rate of the catalytic reaction is fast enough while the yield is also appreciable for this exothermic reaction at this temperature.
Sridhar H Tu H H H asked • 2 hours agoGravitational acceleration on the surface of a planet is 
where g is the gravitational acceleration on the surface of the earth. The average mass density of the planet is 2/3 times that of the earth. If the escape speed on the surface of the earth is taken to be 11 kms-1, the escape speed on the surface of the planet in kms-1 will be[jee 2010]
Correct answer is '3'. Can you explain this answer?
Gravitational acceleration on the surface of a planet is where g is the gravitational acceleration on the surface of the earth. The average mass density of the planet is 2/3 times that of the earth. If the escape speed on the surface of the earth is taken to be 11 kms-1, the escape speed on the surface of the planet in kms-1 will be
where g is the gravitational acceleration on the surface of the earth. The average mass density of the planet is 2/3 times that of the earth. If the escape speed on the surface of the earth is taken to be 11 kms-1, the escape speed on the surface of the planet in kms-1 will be[jee 2010]
Jahnavi Chinnu asked • 2 hours agoA bomb is dropped from an aeroplane when it is directly above a target at a height of 1254.4 m. The aeroplane is going horizontally with a speed of 150 m/s. The distance by which it will miss the target is - a)1.2 km
- b)2.4 km
- c)1.8 km
- d)2.8 km
Correct answer is option 'B'. Can you explain this answer?
A bomb is dropped from an aeroplane when it is directly above a target at a height of 1254.4 m. The aeroplane is going horizontally with a speed of 150 m/s. The distance by which it will miss the target is
a)
1.2 km
b)
2.4 km
c)
1.8 km
d)
2.8 km
Sridhar H Tu H H H asked • 2 hours agoSuppose the gravitational forces varies inversely as the nth power of distance. Then the time period of a planet in circular orbit of radius R around the sun will be proportional to[AIEEE 2004]- a)
- b)
- c)
- d)
Correct answer is option 'A'. Can you explain this answer?
Suppose the gravitational forces varies inversely as the nth power of distance. Then the time period of a planet in circular orbit of radius R around the sun will be proportional to
[AIEEE 2004]
a)
b)
c)
d)
Ashish Bahl asked • 3 hours agoTwo masses m1 & m2 are initially at rest and are separated by a very large distance. If the masses approach each other subsequently, due to gravitational attraction between them, their relative velocity of approach at a separation distance of d is- a)
- b)
- c)
- d)(m1 + m2)1/2 2Gd
Correct answer is option 'C'. Can you explain this answer?
Two masses m1 & m2 are initially at rest and are separated by a very large distance. If the masses approach each other subsequently, due to gravitational attraction between them, their relative velocity of approach at a separation distance of d is
a)
b)
c)
d)
(m1 + m2)1/2 2Gd
Aisha Mahboob asked • 3 hours agoIf we apply Newton’s First Law to torque then the statement will be- a)If the net torque acting on a rigid object is zero, it will rotate with a constant angular velocity
- b)If the net torque acting on a rigid object is non zero, it will rotate with a constant angular velocity
- c)If the net torque acting on a rigid object is zero, it will rotate with a non-uniform angular velocity
- d)If the net torque acting on a rigid object is non zero, it will rotate with a non-uniform angular velocity
Correct answer is option 'C'. Can you explain this answer?
If we apply Newton’s First Law to torque then the statement will be
a)
If the net torque acting on a rigid object is zero, it will rotate with a constant angular velocity
b)
If the net torque acting on a rigid object is non zero, it will rotate with a constant angular velocity
c)
If the net torque acting on a rigid object is zero, it will rotate with a non-uniform angular velocity
d)
If the net torque acting on a rigid object is non zero, it will rotate with a non-uniform angular velocity
Yashwardhan Shinde asked • 3 hours agoThe orbit of a planet P round the sun S. AB and CD are the minor and major axes of the ellipse. 
If U is the potential energy and K kinetic energy then |U| > |K| at- a)Only D
- b)Only C
- c)Both D & C
- d)Neither D nor C
Correct answer is option 'C'. Can you explain this answer?
The orbit of a planet P round the sun S. AB and CD are the minor and major axes of the ellipse.
If U is the potential energy and K kinetic energy then |U| > |K| at
a)
Only D
b)
Only C
c)
Both D & C
d)
Neither D nor C
Talwinder Kaur asked • 3 hours agoEach leaf of Cycas is supplied by :- a)Two direct traces and two girdle traces
- b)A number of direct traces and two girdle traces
- c)A number of direct traces and a number of girdle traces
- d)Two direct traces and a number of girdle traces
Correct answer is option 'A'. Can you explain this answer?
Each leaf of Cycas is supplied by :
a)
Two direct traces and two girdle traces
b)
A number of direct traces and two girdle traces
c)
A number of direct traces and a number of girdle traces
d)
Two direct traces and a number of girdle traces
Kasi Vishwanath Boddeti asked • 4 hours agoIncreasing order of stability among the three main conformation (i.e. eclipse, anti, gauche) of ethylene glycol is:- a)Eclipse, gauche, anti
- b)Gauche, eclipse, anti
- c)Eclipse, anti, gauche
- d)Anti, gauche, elipse
Correct answer is option 'A'. Can you explain this answer?
Increasing order of stability among the three main conformation (i.e. eclipse, anti, gauche) of ethylene glycol is:
a)
Eclipse, gauche, anti
b)
Gauche, eclipse, anti
c)
Eclipse, anti, gauche
d)
Anti, gauche, elipse
Anindya Mittal asked • 4 hours agoA ball is thrown from a point with a speed v0 at an angle fo projection 
. From the same point and at the same instant, a person starts running with a constant speed 
to catch the ball. Will the person be able to catch the ball? If yes, what should be the angle of projection ?[AIEEE 2004]- a)Yes, 60°
- b) Yes, 30°
- c)No
- d)Yes, 45°
Correct answer is option 'A'. Can you explain this answer?
A ball is thrown from a point with a speed v0 at an angle fo projection . From the same point and at the same instant, a person starts running with a constant speed to catch the ball. Will the person be able to catch the ball? If yes, what should be the angle of projection ?
. From the same point and at the same instant, a person starts running with a constant speed to catch the ball. Will the person be able to catch the ball? If yes, what should be the angle of projection ?[AIEEE 2004]
a)
Yes, 60°
b)
Yes, 30°
c)
No
d)
Yes, 45°
Saroj Devi asked • 4 hours agoSpeeds of two identical cars u and 4u at a specific instant. The ratio of the respective distances at which the two cars are stopped from that instant by same braking force :[AIEEE 2002]- a)1 : 1
- b) 1 : 4
- c) 1 : 8
- d)1 : 16
Correct answer is option 'D'. Can you explain this answer?
Speeds of two identical cars u and 4u at a specific instant. The ratio of the respective distances at which the two cars are stopped from that instant by same braking force :
[AIEEE 2002]
a)
1 : 1
b)
1 : 4
c)
1 : 8
d)
1 : 16
Barleen Kaur asked • 5 hours agoHow will you distinguish between (give one test) ethylene and acetylene?
Shivam Rai asked • 5 hours agoAccording to the principle of homogeneity of dimensions- a)we can subtract similar physical quantities
- b)we can add or subtract similar physical quantities
- c)we can add similar physical quantities
- d)we can add or subtract any physical quantities
Correct answer is option 'B'. Can you explain this answer?
According to the principle of homogeneity of dimensions
a)
we can subtract similar physical quantities
b)
we can add or subtract similar physical quantities
c)
we can add similar physical quantities
d)
we can add or subtract any physical quantities
Harpreet Kaur asked • 5 hours agoA 100 m long rod of density 10.0 x 104 kg/m3 and having Young’s modules Y = 1011 Pa, is clamped at one end. It is hammered at the other free end. The longitudinal pulse goes to right end, gets reflected and again returns to the left end. How much time, the pulse take to go back to initial point.
- a)0.1 sec
- b)0.2 sec
- c)0.3 sec
- d)2 sec
Correct answer is option 'B'. Can you explain this answer?
A 100 m long rod of density 10.0 x 104 kg/m3 and having Young’s modules Y = 1011 Pa, is clamped at one end. It is hammered at the other free end. The longitudinal pulse goes to right end, gets reflected and again returns to the left end. How much time, the pulse take to go back to initial point.
a)
0.1 sec
b)
0.2 sec
c)
0.3 sec
d)
2 sec
Anirban Saha asked • 5 hours agoA rectangular tank is placed on a horizontal ground and is filled with water to a height H above the base. A small hole is made on one vertical side at a depth D below the level of the water in the tank. The distance x from the bottom of the tank at which the water jet from the tank will hit the ground is- a)
- b)
- c)
- d)
Correct answer is option 'A'. Can you explain this answer?
A rectangular tank is placed on a horizontal ground and is filled with water to a height H above the base. A small hole is made on one vertical side at a depth D below the level of the water in the tank. The distance x from the bottom of the tank at which the water jet from the tank will hit the ground is
a)
b)
c)
d)
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