### ALL Questions

## A shell is fired at a speed of 200 m/s at an angle of 37° above horizontal from top of a tower 80m high. At the same instant another shell was fired from a jeep travelling away from the tower at a speed of 10 m/s as shown. The velocity of this shell relative to jeep is 250 m/s at an angle of 53° with horizontal. Find the time (in sec) taken by the two shells to come closest?

A shell is fired at a speed of 200 m/s at an angle of 37° above horizontal from top of a tower 80m high. At the same instant another shell was fired from a jeep travelling away from the tower at a speed of 10 m/s as shown. The velocity of this shell relative to jeep is 250 m/s at an angle of 53° with horizontal. Find the time (in sec) taken by the two shells to come closest.

## Four charges q, 2q, –4q and 2q are placed in order at the four corners of a square of side b. The net field at the centre of square is?

Four charges q, 2q, –4q and 2q are placed in order at the four corners of a square of side b. The net field at the centre of square is?

## a elastic spring is compressed b/w 2 block of masses 1 and 2 kg resting on smooth horizontal table if spring has 12 j of energy and suddenly released the velocity with which 2 kg moves with

a elastic spring is compressed b/w 2 block of masses 1 and 2 kg resting on smooth horizontal table if spring has 12 j of energy and suddenly released the velocity with which 2 kg moves with

## Find the equation of the hyperbola whose directrix is 2x + y = 1, focus (1, 2) and eccentricity is root 3?

Find the equation of the hyperbola whose directrix is 2x + y = 1, focus (1, 2) and eccentricity

## if soap sol has surface tension t and a bubble of diameter d blown through it then work done to blow bubble

if soap sol has surface tension t and a bubble of diameter d blown through it then work done to blow bubble

## work

a body freely falls from certain height onto ground in time t during first 1/3rd of time interval it gains ake1 and during last 1/3 rd of intervalit gains ke2 the ratio of ke1/ke2 is

## WHat is Osmosis and Osmotic Pressure ?

WHat is Osmosis and Osmotic Pressure ?

## 1.00 g of a non-electrolyte solute dissolved in 50 g of benzene lowered the freezing point of benzene by 0.40 K. The freezing point depression constant of benzene is 5.12 K kg mol–1. Find the molar mass of the solute

1.00 g of a non-electrolyte solute dissolved in 50 g of benzene lowered the freezing point of benzene by 0.40 K. The freezing point depression constant of benzene is 5.12 K kg mol–1. Find the molar mass of the solute

## 45 g of ethylene glycol (C2H6O2) is mixed with 600 g of water. Calculate (a) the freezing point depression and (b) the freezing point of the solution

45 g of ethylene glycol (C2H6O2) is mixed with 600 g of water. Calculate (a) the freezing point depression and (b) the freezing point of the solution

## The boiling point of benzene is 353.23 K. When 1.80 g of a non-volatile solute was dissolved in 90 g of benzene, the boiling point is raised to 354.11 K. Calculate the molar mass of the solute. Kb for benzene is 2.53 K kg mol–1

The boiling point of benzene is 353.23 K. When 1.80 g of a non-volatile solute was dissolved in 90 g of benzene, the boiling point is raised to 354.11 K. Calculate the molar mass of the solute. Kb for benzene is 2.53 K kg mol–1

## The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyte solid weighing 0.5 g when added to 39.0 g of benzene (molar mass 78 g mol-1). Vapour pressure of the solution, then, is 0.845 bar. What is the molar mass of the solid substance?

The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyte solid weighing 0.5 g when added to 39.0 g of benzene (molar mass 78 g mol-1). Vapour pressure of the solution,

then, is 0.845 bar. What is the molar mass of the solid substance?

## What is Non-ideal Solutions?

What is Non-ideal Solutions?

## WHat is Ideal Solutions ?

WHat is Ideal Solutions ?

## Please explain Raoult’s Law as a special case of Henry’s Law..

Please explain Raoult’s Law as a special case of Henry’s Law ..

## Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 298 K are 200 mm Hg and 415 mm Hg respectively. (i) Calculate the vapour pressure of the solution prepared by mixing 25.5 g of CHCl3 and 40 g of CH2Cl2 at 298 K and, (ii) mole fractions of each component in vapour phase.

Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 298 K are 200 mm Hg and 415 mm Hg respectively. (i) Calculate the vapour pressure of the solution prepared by mixing 25.5 g of CHCl3 and 40 g of H2Cl2 at 298 K and, (ii) mole fractions of each component in vapour phase.

## What is Raoult’s law ?

**What is Raoult’s law ?**

## What is Effect of Temperature on Solubility?

What is Effect of Temperature on Solubility?

## Explain the Biological phenomena of Henry’s law

Explain the Biological phenomena of Henry’s law

## If N2 gas is bubbled through water at 293 K, how many millimoles of N2 gas would dissolve in 1 litre of water. Assume that N2 exerts a partial pressure of 0.987 bar. Given that Henry’s law constant for N2 at 293 K is 76.48 kbar.

If N2 gas is bubbled through water at 293 K, how many millimoles of N2 gas would dissolve in 1 litre of water. Assume that N2 exerts a partial pressure of 0.987 bar. Given that Henry’s law constant for N2 at 293 K is

76.48 kbar.

## A box contains 5 different red and 6 different white balls. In how many ways can 6 balls be drawn so that there are at least two balls of each colour ?

## A college offers 6 courses in the morning and 4 in the evening. The number of ways a student can select exactly one course, either in the morning or in the evening?

A college offers 6 courses in the morning and 4 in the evening. The number of ways a student can select exactly one course, either in the morning or in the evening?

## A college offers 6 courses in the morning and 4 in the evening. The possible number of choices with the student if he wants to study one course in the morning and one in the evening is?

A college offers 6 courses in the morning and 4 in the evening. The possible number of choices with the student if he wants to study one course in the morning and one in the evening is?

## law of motion

a mass of 3kg descending vertically downward supports a mass 2 kg by means of light string passing over a pulley at end of 5 sec the string breaks how much higher 2kg mass will go

## Given two events A and B. If odds against A are as 2 : 1 and those in favour of A B are as 3 : 1, then find the range of P(B)?

Given two events A and B. If odds against A are as 2 : 1 and those in favour of A B are as 3 : 1, then find the range of P(B)?

## Three vertices out of six vertices of a regular hexagon are chosen randomly. The probability of getting a equilateral triangle after joining three vertices is ?

Three vertices out of six vertices of a regular hexagon are chosen randomly. The probability of getting a equilateral triangle after joining three vertices is ?

## If four cards are drawn at random from a pack of fifty-two playing cards, find the probability that at least one of them is an ace?

If four cards are drawn at random from a pack of fifty-two playing cards, find the probability that at least one of them is an ace?

## From a group of 10 persons consisting of 5 lawyers, 3 doctors and 2 engineers, four persons are selected at random. The probability that the selection contains at least one of each category is?

From a group of 10 persons consisting of 5 lawyers, 3 doctors and 2 engineers, four persons are selected at random. The probability that the selection contains at least one of each category is?

## If the letters of INTERMEDIATE are arranged, then the odds in favour of the event that no two 'E's occur together, are ?

If the letters of INTERMEDIATE are arranged, then the odds in favour of the event that no two 'E's occur together, are ?

## A bag contains 5 red and 4 green balls. Four balls are drawn at random, then find the probability that two balls are of red and two balls are of green colour?

A bag contains 5 red and 4 green balls. Four balls are drawn at random, then find the probability that two balls are of red and two balls are of green colour?

## Words are formed with the letters of the word PEACE. Find the probability that 2 E’s come together?

Words are formed with the letters of the word PEACE. Find the probability that 2 E’s come together?

## A coin is tossed successively three times. Find the probability of getting exactly one head or two heads?

A coin is tossed successively three times. Find the probability of getting exactly one head or two heads?

## A coin is tossed. If it shows head, we draw a ball from a bag consisting of 3 blue and 4 white balls; if it shows tail we throw a die. Describe the sample space of this experiment.?

A coin is tossed. If it shows head, we draw a ball from a bag consisting of 3 blue and 4 white balls; if it shows tail we throw a die. Describe the sample space of this experiment.

## In a uniform electric field, a cube of side 1 cm is placed. The total energy stored in the cube is 8.85μJ. The electric field is parallel to four of the faces of the cube. The electric flux through any one of the remaining two faces is.

In a uniform electric field, a cube of side 1 cm is placed. The total energy stored in the cube is 8.85μJ. The electric field is parallel to four of the faces of the cube. The electric flux through any one of the remaining two faces is.

## Suppose that two heat engines are connected in series, such that the heat exhaust of the first engine is used as the heat input of the second engine as shown in figure. The efficiencies of the engines are n1 and n2, respectively. The net efficiency of the combination is given by?

Suppose that two heat engines are connected in series, such that the heat exhaust of the first engine is used as the heat input of the second engine as shown in figure. The efficiencies of the engines are n1 and n2, respectively. The net efficiency of the combination is given by?

## A charged particle oscillates about its mean equilibrium position with a frequency of 10^9 Hz. The electromagnetic waves produced?

A charged particle oscillates about its mean equilibrium position with a frequency of Hz. The electromagnetic waves produced

## A magnet is suspended in such a way when it oscillates in the horizontal plane. It makes 20 oscillations per minute at a place where dip angle is 30 and 15 oscillations per min at a place where dip angle is 60 . Find the ratio of the total earth's magnetic field at the two places?

A magnet is suspended in such a way when it oscillates in the horizontal plane. It makes 20 oscillations per minute at a place where dip angle is 30 and 15 oscillations per min at a place where dip angle is 60 . Find the ratio of the total earth's magnetic field at the two places?

## A 1-meter long narrow solenoid having 1000 turns is placed in magnetic meridian. Find the current in the solenoid which neutralises the earth’s horizontal field of 0.36 oersted at the centre of the solenoid

A 1-meter long narrow solenoid having 1000 turns is placed in magnetic meridian. Find the current in the solenoid which neutralises the earth’s horizontal field of 0.36 oersted at the centre of the solenoid

## If the dip circle is set at 45 to the magnetic meridian, then the apparent dip is 30 . Calculate the true dip.

If the dip circle is set at 45 to the magnetic meridian, then the apparent dip is 30 . Calculate the true dip.

## At a certain place, the horizontal component of earth's magnetic field is root 3 times of the vertical component. What the angle of dip at that place.

At a certain place, the horizontal component of earth's magnetic field is root times of the vertical component. What the angle of dip at that place.

## Discuss the local maximum and local minimum values of f(x).

Discuss the local maximum and local minimum values of f(x).

## What is Solubility please explain

What is Solubility please explain

## Calculate molality of 2.5 g of ethanoic acid (CH3COOH) in 75 g of benzene

Calculate molality of 2.5 g of ethanoic acid (CH3COOH) in 75 g of benzene

## Calculate the molarity of a solution containing 5 g of NaOH in 450 mL solution

Calculate the molarity of a solution containing 5 g of NaOH in 450 mL solution

## Calculate the mole fraction of ethylene glycol (C2H6O2) in a solution containing 20% of C2H6O2 by mass

Calculate the mole fraction of ethylene glycol (C2H6O2) in a solution containing 20% of C2H6O2 by mass

## How many Type of Solution exist , please describe

**How many Type of Solution exist , please describe **

## What is Solvent and Solute, please explain?

**What is Solvent and Solute, please explain?**

## What is Solution , please explain?

**What is Solution , please explain?**

## In a group of 1000 people, there are 750 who can speak Hindi and 400 who can speak English. How many can speak Hindi only ?How many can speak English ? How many can speak both Hindi and English?

In a group of 1000 people, there are 750 who can speak Hindi and 400 who can speak English. How many can speak Hindi only ?How many can speak English ? How many can speak both Hindi and English?

## A billiard ball is hit by a cue at a point distance h above the centre. It acquires a linear velocity v0. Let m be the mass and r be the radius of the ball. The angular velocity acquired by the ball is?

A billiard ball is hit by a cue at a point distance h above the centre. It acquires a linear velocity v0. Let m be the mass and r be the radius of the ball. The angular velocity acquired by the ball is?

## A simple pendulum is suspended in a lift which 5. is going up with an acceleration 5 m/s2. An electric field of magnitude 5 N/C and directed vertically upward is also present in the lift. The charge of the bob is 1 mC and mass is 1 mg. Taking g = p2 and length of the simple pendulum 1m, the time period of the simple pendulum is

A simple pendulum is suspended in a lift which 5. is going up with an acceleration 5 m/s^2. An electric field of magnitude 5 N/C and directed vertically upward is also present in the lift. The charge of the bob is 1 mC and mass is 1 mg. Taking g = and length of the simple pendulum 1m, the time period of the simple pendulum is