### ALL Questions

## Explain Metallic Solids

Explain Metallic Solids

## Explain Ionic Solids

Explain Ionic Solids

## Explain Molecular Solids

Explain Molecular Solids

## Classification of Crystalline Solids

**Classification of Crystalline Solids**

## What is Difference Between Amorphous and Crystalline Solids ?

What is the Difference Between Amorphous and Crystalline Solids?

## What is Amorphous and Crystalline Solids

What is Amorphous and Crystalline Solids

## A sounding body emitting a frequency of 150 Hz is dropped from a height. During its fall under gravity it crosses a balloon moving upwards with a constant velocity of 2m/s one second after it started to fall. The difference in the frequency observed by the man in balloon just before and just after crossing the body will be: (given that -velocity of sound = 300m/s; g = 10m/s2 )

A sounding body emitting a frequency of 150 Hz is dropped from a height. During its fall under gravity it crosses a balloon moving upwards with a constant velocity of 2m/s one second after it started to fall. The difference in the frequency observed by the man in balloon just before and just after crossing the body will be:

Given that -velocity of sound = 300m/s; g = 10m/s2.

(A) 4

(B) 6

(C) 8

(D) 12

## Describe the General Characteristics of Solid State

Describe the General Characteristics of Solid State

## One mole of an ideal gas at a temperature T1 expands slowly according to the law V p = constant. Its final temperature is T2 . What will be the work done by gas?

One mole of an ideal gas at a temperature T_{1 } expands slowly according to the law p/V = constant. Its final temperature is T_{2}. The work done by the gas is :

## What is Projectile Motion ? Please explain with example?

What is Projectile Motion ? Please explain with example?

## A passenger is standing d distance away from a bus. The bus begins to move with constant acceleration a. To catch the bus, the passenger runs at a constant speed u towards the bus. What must be the minimum speed of the passenger so that he may catch the bus?

A passenger is standing d distance away from a bus. The bus begins to move with constant acceleration a. To catch the bus, the passenger runs at a constant speed u towards the bus. What must be the minimum speed of the passenger so that he may catch the bus?

## A driver takes 0.30 s to apply the brakes after he sees a need for it. This is called the reaction time of the driver. If he is driving a car at a speed of 54 km/h and the brakes cause a deceleration of 5.0m/s2, find the distance travelled by the car after he sees the need to put the brakes on ?

A driver takes 0.30 s to apply the brakes after he sees a need for it. This is called the reaction time of the driver. If he is driving a car at a speed of 54 km/h and the brakes cause a deceleration of 5.0m/s2, find the distance travelled by the car after he sees the need to put the brakes on ?

## Two moving particles P and Q are 10 m apart at any instant. Velocity of P is 8 m/s at 30 degree, from line joining the P and Q and velocity of Q is 6m/s at 30 degree.Calculate the angular velocity of P w.r.t. Q

Two moving particles P and Q are 10 m apart at any instant. Velocity of P is 8 m/s at 30degree, from line joining the P and Q and velocity of Q is 6m/s at 30 degree.Calculate the angular velocity of P w.r.t. Q

## What is the value of sec2(tan−1(2))+cosec2(cot−1(3))?

## The force of repulsion between two point charges is F, when these are at a distance of 1 m. Now the point charges are replaced by spheres of radii 25 cm having the charge same as that of point charges. The distance between their centres is 1 m, then compare the force of repulsion in two cases.

The force of repulsion between two point charges is F, when these are at a distance of 1 m. Now the point charges are replaced by spheres of radii 25 cm having the charge same as that of point charges. The distance between their centres is 1 m, then compare the force of repulsion in two cases.

## A particle of mass m carrying charge '+q1' is revolving around a fixed charge '–q2' in a circular path of radius r. Calculate the period of revolution.

A particle of mass m carrying charge '+q1' is revolving around a fixed charge '–q2' in a circular path of radius r. Calculate the period of revolution.

## If the distance between two equal point charges is doubled and their individual charges are also doubled, what would happen to the force between them?

If the distance between two equal point charges is doubled and their individual charges are also doubled, what would happen to the force between them?

## What is the role of depressant in froth floatation process?

What is the role of depressant in froth floatation process?

## Copper can be extracted by hydrometallurgy but not zinc. Explain.

Copper can be extracted by hydrometallurgy but not zinc. Explain.

## When a piece of polythene is rubbed with wool, a charge of – 2*10–7 C is developed on polythene. What is the amount of mass, which is transferred to polythene.

When a piece of polythene is rubbed with wool, a charge of – 2*10–7 C is developed on polythene. What is the amount of mass, which is transferred to polythene.

## If A and B are two sets containing 3 and 2 elements respectively. What would be then the no of subsets of AxB?

## What is the value of F′(x)?

Can anybody help me here. Thanks!!

## A large number of particles are moving each with speed v having directions of motion randomly distributed. What is the average relative velocity between any two particles averaged over all the pairs?

A large number of particles are moving each with speed v having directions of motion randomly distributed. What is the average relative velocity between any two particles averaged over all the pairs?

## A particle is moving along a straight line along x-axis with an initial velocity of 2 m/s towards positive x-axis. A constant acceleration of 0.5 m/s2 towards negative x-axis starts acting on particle at t=0. Find velocity (in m/s) of particle at t = 2s.

A particle is moving along a straight line along x-axis with an initial velocity of 2 m/s towards positive x-axis. A constant acceleration of 0.5 m/s2 towards negative x-axis starts acting on particle at t=0. Find velocity (in m/s) of particle at t = 2s.

## A body is thrown up with a speed 49 m/s. It travels 5 m in the last second of its upward journey. If the same body is thrown up with a velocity 98 m/s, how much distance (in m) will it travel in the last second. (g = 10 m/s2)?

A body is thrown up with a speed 49 m/s. It travels 5 m in the last second of its upward journey. If the same body is thrown up with a velocity 98 m/s, how much distance (in m) will it travel in the last second. (g = 10 m/s2)?

## What is the interval of increase and decrease of funcunction?

Given f(x) = e^{ (x 2 - x)}, find

a) the interval(s) of increase and decrease of f,

b) value(s) of x for which f has a local extremum,

c) the interval(s) of concavity and any inflection point(s).

## WHAT IS Zone refining METHOD/TECHNIQUE TO REFINE METAL

WHAT IS Zone refining METHOD/TECHNIQUE TO REFINE METAL

## WHAT IS Electrolytic refining METHOD/TECHNIQUE TO REFINE METAL

WHAT IS Electrolytic refining METHOD/TECHNIQUE TO REFINE METAL

## WHAT IS Liquation METHOD/TECHNIQUE TO REFINE METAL

## WHAT IS Liquation METHOD/TECHNIQUE TO REFINE METAL

## What is Distillation method/technique to Refine Metal

What is Distillation method/technique to Refine Metal

## A particle is projected vertically upwards the surface of the earth (radius Re) with a speed equal to one fourth of escape velocity. What is the maximum height attained by it from the surface of the earth ?

A particle is projected vertically upwards the surface of the earth (radius Re) with a speed equal to one fourth of escape velocity. What is the maximum height attained by it from the surface of the earth ?

## At a site, low grade copper ores are available and zinc and iron scraps are also available. Which of the two scraps would be more suitable for reducing the leached copper ore and why?

At a site, low grade copper ores are available and zinc and iron scraps are also available. Which of the two scraps would be more suitable for reducing the leached copper ore and why?

## Why is the reduction of a metal oxide easier if the metal formed is in liquid state at the temperature of reduction?

Why is the reduction of a metal oxide easier if the metal formed is in liquid state at the temperature of reduction?

## Although thermodynamically feasible, in practice, magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Why ?

Although thermodynamically feasible, in practice, magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Why ?

## Suggest a condition under which magnesium could reduce alumina

Suggest a condition under which magnesium could reduce alumina

## what is Limitations of Ellingham Diagram

what is Limitations of Ellingham Diagram

## Explain Ellingham Diagram

Explain Ellingham Diagram

## EXPLAIN Froth Floatation Method FOR CONCENTRATION OF ORES .

EXPLAIN Froth Floatation Method FOR CONCENTRATION OF ORES .

## EXPLAIN Magnetic Separation PROCESS FOR CONCENTRATION OF ORES .

EXPLAIN Magnetic Separation PROCESS FOR CONCENTRATION OF ORES .

## Explain Hydraulic Washing process for Concentration of Ores .

Explain Hydraulic Washing process for Concentration of Ores .

## What is the Concentration of Ores of Ores

What is the Concentration of Ores of Ores

## Please let me know the Principal Ores of Some Important Metals

SOne please let me know the Principal Ores of Some Important Metals

## A solid sphere of mass M and radius R is surrounded by a spherical shell of same mass M and radius 2R as shown. A small particle of mass m is released from rest from a height h (<<R) above the shell. There is a hole in the shell.

A solid sphere of mass M and radius R is surrounded by a spherical shell of same mass M and radius 2R as shown. A small particle of mass m is released from rest from a height h (<<R) above the shell. There is a hole in the shell.

## If the law of gravitation be such that the force of attraction between two particles vary inversely as the 5/2th power of their separation, then the graph of orbital velocity v0 plotted against the distance r of a satellite from the earth's centre on a log-log scale is shown alongside. The slope of line will be

If the law of gravitation be such that the force of attraction between two particles vary inversely as the 5/2th power of their separation, then the graph of orbital velocity v0 plotted against the distance r of a satellite from the earth's centre on a log-log scale is shown alongside. The slope of line will be

## A body starts performing uniform circular motion with 100 rounds per min. After how much minimum time its average velocity will be zero?

## What is (P ∪ Q) × (P ∩ Q) If P = {x : x < 3, x ∈ N}, Q = {x : x ≤ 2, x ∈ W} and W is the set of whole numbers.

## What is the domain of f + g if f and g be two functions given by f = {(2, 4), (5, 6), (8, – 1), (10, – 3)} g = {(2, 5), (7, 1), (8, 4), (10, 13), (11, – 5)}?

## If A and B be any two sets such that n(B) = p, n(A) = q then what is the total number of functions f : A → B is equal to?