### ALL Questions

## Why Berilium and Al are placed in different periods and groups but they show the similar properties?

Why Berilium and Al are placed in different periods and groups but they show similar properties?

## Why The radii of Ar is greater than the radii of chlorine?

Why The radii of Ar is greater than the radii of chlorine?

## Why Viroids differ from viruses?

Why Viroids differ from viruses?

## A swimmer can swim in still water with a speed of 5 m/s. While crossing a river his average speed is 3 m/s. If he cross the river in the shortest possible time, what is the speed of flow of water?

A swimmer can swim in still water with a speed of 5 m/s. While crossing a river his average speed is 3 m/s. If he cross the river in the shortest possible time, what is the speed of flow of water?

## Lichens are well known combination of an alga and a fungus where fungus has?

Lichens are well known combination of an alga and a fungus where fungus has?

## A current of 3 ampere was passed for 2 hours through a solution of CuSO4. 3 gm of Cu2+ ions were discharged at cathode calculate the current efficiency.

A current of 3 ampere was passed for 2 hours through a solution of CuSO4. 3 gm of Cu2+ ions were discharged at cathode calculate the current efficiency.

## Cellulose is the major component of cell walls of?

Cellulose is the major component of cell walls of?

## The imperfect fungi which are decomposers of litter and help in mineral cycling belong to?

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to?

## Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom?

Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom?

## Bacterial cell divides every one minute. It takes 15 minutes a cup to be one-fourth full. How much time will it take to fill the cup?

Bacterial cell divides every one minute. It takes 15 minutes a cup to be one-fourth full. How much time will it take to fill the cup?

## Domain Eukarya includes how many kingdoms (w.r.t. six kingdom system)?

Domain Eukarya includes how many kingdoms (w.r.t. six kingdom system)?

## The protein coat called capsid made of small subunits called capsomeres are present in?

The protein coat called capsid made of small subunits called capsomeres are present in?

## The sex organs are absent, but plasmogamy is brought about by fusion of two vegetative or somatic cells of different genotypes. It is the feature of?

The sex organs are absent, but plasmogamy is brought about by fusion of two vegetative or somatic cells of different genotypes. It is the feature of?

## Position of bacteria in the kingdom system of classification proposed by Linnaeus is?

Position of bacteria in the kingdom system of classification proposed by Linnaeus is?

## During favourable conditions bacteria mainly reproduce by

During favourable conditions bacteria mainly reproduce by

## 1 mL of 10–5 M HCl solution is diluted to 1000 mL. Calculate the pH of the resulting solution?

1 mL of 10–5 M HCl solution is diluted to 1000 mL. Calculate the pH of the resulting solution?

## Find the height

If a man weighs 90 N on the surface of the Earth, then the height above the surface of the earth of radius R, when the height is where the weight is 30N is

A.0.73R

B. R/√3

C.3R

D.√3R

## A sample of a gas initially at 27°C is compressed from 40 litres to 4 litres adiabatically and reversibly. Calculate the final temperature (Cv = 5 cal/mole)

A sample of a gas initially at 27°C is compressed from 40 litres to 4 litres adiabatically and reversibly. Calculate the final temperature (Cv = 5 cal/mole)

## Copper sulphate solution (250 ml) was electrolyzed using a platinum anode and copper cathode. A constant current of 2 mA was passed for 16 minute. It was found that after electrolysis, the absorbance of the solution was reduced to 50% of its original value. Calculate the concentration of copper sulphate ion in the solution to begin with.

Copper sulphate solution (250 ml) was electrolyzed using a platinum anode and copper cathode. A constant current of 2 mA was passed for 16 minute. It was found that after electrolysis, the absorbance of the solution was reduced to 50% of its original value. Calculate the concentration of copper sulphate ion in the solution to begin with.

## Number of ways in which 7 girls & 7 boys can be arranged such that no two boys and no two girls are together is?

Number of ways in which 7 girls & 7 boys can be arranged such that no two boys and no two girls are together is?

## U=√T/m। T=Mg। M=२Kg। m = 1.5g/m v=? Percentage error

## The configuration of the C-2 epimer of D-glucose is?

The configuration of the C-2 epimer of D-glucose is

## In low temperature range fraction of heat supplied to an ideal diatomic gas system, at constant pressure, which bring change in its internal energy is approx.......?

In low temperature range fraction of heat supplied to an ideal diatomic gas system, at constant pressure, which bring change in its internal energy is approx.......?

## Consider a parabola x2 = 4y and a hyperbola xy = 1. A tangent is drawn to parabola meets the hyperbola in A and B then locus of midpoint of AB is

Consider a parabola

and a hyperbola XY = 1. A tangent is drawn to parabola meets the hyperbola in A and B then the locus of midpoint of AB is

## The total number of 1 word, 2 word, 3 word sentences that can be formed using the letters of the word SAMSUNG is?

The total number of 1 word, 2 word, 3 word sentences that can be formed using the letters of the word SAMSUNG is?

## For n => 3 circles, the value of n for which the number of radical axis is equal to number of radical centres is?

For n => 3 circles, the value of n for which the number of the radical axis is equal to number of radical centres is?

## A compound is composed of two elements A and B, element A constitute f.c.c. lattice, while B occupy all the tetrahedral voids, in this way another simple cubic is constituted by element B, inside the fcc unit cell of element A. If all the points/particles along any one edge of inner cube of every unit cell, are missing then what is the new empirical formula of the compound

A compound is composed of two elements A and B, element A constitute f.c.c. lattice, while B occupy all the tetrahedral voids, in this way another simple cubic is constituted by element B, inside the fcc unit cell of element A. If all the points/particles along any one edge of inner cube of every unit cell, are missing then what is the new empirical formula of the compound?

## The specific heat capacity of a monoatomic gas for the process T*V*V = constant is (where R is gas constant)?

The specific heat capacity of a monoatomic gas for the process T*V*V = constant is (where R is gas constant)?

## A block of mass 2 kg is attached to one end of a massless rod of length 1/22/7 m . The rod is fixed to a horizontal plane at the other end such that the block and rod are free to revolve on a horizontal plane. The coefficient of friction between the block and surface is 0.1. Block is made to rotate with uniform speed by applying a constant external force in tangential direction on the block. The work done by external force when the rod rotates by 90 degreeis

A block of mass 2 kg is attached to one end of a massless rod of length . The rod is fixed to a horizontal plane at the other end such that the block and rod are free to revolve on a horizontal plane. The coefficient of friction between the block and surface is 0.1. Block is made to rotate with uniform speed by applying a constant external force in tangential direction on the block. The work is done by external force when the rod rotates by 90 degree is

## In low temperature range fraction of heat supplied to an ideal diatomic gas system, at constant pressure, which bring change in its internal energy is approx.?

In low temperature range fraction of heat supplied to an ideal diatomic gas system, at constant pressure, which bring change in its internal energy is approx.?

## The area enclosed between the curves y = sin2x and y = cos2 x in the interval 0 <= x <= pie is

The area enclosed between the curves

## A block is suspended by an ideal spring constant K. If the block is pulled down by constant force F and if maximum displacement of block from it’s initial position of rest is z, then

A block is suspended by an ideal spring constant K. If the block is pulled down by constant force F and if the maximum displacement of the block from it’s the initial position of rest is z, then find the value of z

## Resonance Energy of Toluene is 37.5 kcal/mol while that of Benzene is 36 kcal/mole then which of the following explains this difference?

Resonance Energy of Toluene is 37.5 kcal/mol while that of Benzene is 36 kcal/mole then which of the following explains this difference?

## A rod of mass 10kg with some point masses tied to it at different positions.Find the distance of the point at which if the rod is picked over a knife edge,it will be in equilibrium about the knife edge

## If A is the areal velocity of planet of mass M, its angular momentum is?

If A is the areal velocity of planet of mass M, its angular momentum is?

## In a hypothetical concept, electron of mass me revolveds around nucleus due to gravitational force of attraction between electron and proton of mass mp. If the radius of circular path of electron is r then the speed of electron is ?

In a hypothetical concept, electron of mass me revolveds around nucleus due to gravitational force of attraction between electron and proton of mass mp. If the radius of circular path of electron is r then the speed of electron is ?

## Three particles, each of mass 10^-2 kg are brought from infinity to the vertices of an equilateral triangle of side 0.1 m, the work done is :

Three particles, each of mass 10^-2 kg are brought from infinity to the vertices of an equilateral triangle of side 0.1 m, the work done is :

## Masses of three wires are in the ratio 1 : 3 : 5 and their lengths are in the ratio 5 : 3 : 1. The ratio of their electrical resistance is?

Masses of three wires are in the ratio 1 : 3 : 5 and their lengths are in the ratio 5 : 3 : 1. The ratio of their electrical resistance is?

## A potential difference of V is applied at the ends of a copper wire of length l and diameter d. On doubling only d, drift velocity

A potential difference of V is applied at the ends of a copper wire of length l and diameter d. On doubling only d, drift velocity

## The resistance of a wire at 20 C is 20 W and at 500 C is 60W. At which temperature resistance will be 25W

The resistance of a wire at 20 C is 20 W and at 500 C is 60W. At which temperature resistance will be 25W

## How three resistance of values 2W, 3W and 6 W can be connected to give an effective resistance of 4W?

How three resistance of values 2W, 3W and 6 W can be connected to give an effective resistance of 4W?

## A particle is moving along straight line such that dot product of its acceleration a and velocity v is negative. How many times particle can be found at a distance d from the origin?

A particle is moving along a straight line such that dot product of its acceleration a and velocity v is negative. How many times particle can be found at a distance d from the origin?

## Two identical discs of mass m and of radius R touch each other and move with the same velocity perpendicularly to the line segment which joins their centres of mass, along the surface of a horizontal smooth tabletop. There is a third disc of mass M and of radius R at rest, at a point on the perpendicular bisector of the line segment joining the centres of mass of the two moving discs as shown in the figure. The two moving discs collide elastically with the third one, which is at rest. There is no friction between the rims of the discs. What should the ratio of M/m be in order that after the collision the two discs of mass m move perpendicularly to their initial velocity?

Two identical discs of mass m and of radius R touch each other and move with the same velocity perpendicularly to the line segment which joins their centres of mass, along the surface of a horizontal smooth tabletop. There is a third disc of mass M and of radius R at rest, at a point on the perpendicular bisector of the line segment joining the centres of mass of the two moving discs as shown in the figure. The two moving discs collide elastically with the third one, which is at rest. There is no friction between the rims of the discs. What should the ratio of M/m be in order that after the collision the two discs of mass m move perpendicularly to their initial velocity?

## Ram travels towards east covering 5 km. He takes a left turn and travels 10 km more. Then, he takes a right turn and travels another 5km and finally takes a right turn to cover 10 km. How far is he from his original position?

Ram travels towards east covering 5 km. He takes a left turn and travels 10 km more. Then, he takes a right turn and travels another 5km and finally takes a right turn to cover 10 km. How far is he from his original position?

## The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

## current

A WIRE HAS LINEAR RESISTANCE P. FIND RESISTANCE R B/W PoinT A AND B IF SIDE OF LARGER SQUARE IS D

## CURRENT

A WIRE HAS LINEAR RESISTANCE P FIND RESISTANCE R B/W PT A AND B IF SIDE OF LARGER SQUARE IS D

A AND B ARE OPP POINTS ON LARGER SQUARE

## ELECRTOSTATICS

10 uc charge is uniformly distributed over thin ring of radius 1m a particle of mass 0.9 g charge 1uc is placed on axis of ring it is displaced towards centre then time period is

## thermo

1 cm3 of water at its bp absorbs 540 cal of heat to become stream with vol of 1671 cm3 if atmpressur1.013 *10^5 n/m2 and mechanical equivalent of heat =4.19 j/cal energy spent in this process in over coming intermolecular forces

## thermo

A cylindrical rod with one end in a stream chamber and other end in ice cause melting of 0.1 gm of ice/sec. If the rod is replaced with another rod of half the length and double the radius of first and thermal conductivity of second rod is 1/4 that of first, find the rate of ice melting in gm/sec