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.

Anonymous User Chemistry 01 May, 2019 11178 views

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.

Anonymous User Chemistry 01 May, 2019 4881 views

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 ?

abhay Maths 30 Apr, 2019 76 views

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?

Anonymous User Maths 30 Apr, 2019 394 views

## 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

Anonymous User Physics 30 Apr, 2019 142 views

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?

Anonymous User Maths 28 Apr, 2019 278 views

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.

Anonymous User Maths 28 Apr, 2019 83 views

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.

Anonymous User Physics 28 Apr, 2019 1325 views

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?

Anonymous User Physics 28 Apr, 2019 1516 views

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

Anonymous User Physics 28 Apr, 2019 75 views

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?

Anonymous User Physics 26 Apr, 2019 111 views

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

Anonymous User Physics 24 Apr, 2019 402 views

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.

Anonymous User Maths 23 Apr, 2019 1380 views

## Discuss the local maximum and local minimum values of f(x). Discuss the local maximum and local minimum values of f(x). Anonymous User Maths 23 Apr, 2019 60 views

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?

Anonymous User Maths 22 Apr, 2019 141 views

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?

Anonymous User Physics 20 Apr, 2019 284 views

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

Anonymous User Physics 20 Apr, 2019 342 views

Calculate the ratio of the speed of sound in neon to that in water vapour at any temperature. [Molecular weight of neon = 2.02 * 10–2 kg/mol and for water vapours = 1.8 * 10–2 kg/mol]

Anonymous User Physics 19 Apr, 2019 645 views

Silver forms ccp lattice and X-ray studies of its crystals show that theedge length of its unit cell is 408.6 pm. Calculate the density of silver (Atomic mass = 107.9 u).

Rajkumar Yadav Chemistry 19 Apr, 2019 896 views

X-ray diffraction studies show that copper crystallises in an fcc unit cell with cell edge of 3.608×10-8 cm. In a separate experiment, copper is determined to have a density of 8.92 g/cm3, calculate the atomic mass of copper

Rajkumar Yadav Chemistry 19 Apr, 2019 163 views

An element has a body-centred cubic (bcc) structure with a cell edge of 288 pm. The density of the element is 7.2 g/cm3. How many atoms are present in 208 g of the element?

Rajkumar Yadav Chemistry 19 Apr, 2019 172 views

What is Packing Efficiency?Explian

Rajkumar Yadav Chemistry 19 Apr, 2019 51 views

Atoms of element B form hcp lattice and those of the element A occupy 2/3rd of tetrahedral voids. What is the formula of the compound formed by the elements A and B?

Rajkumar Yadav Chemistry 19 Apr, 2019 603 views

A compound is formed by two elements X and Y. Atoms of the elementY (as anions) make ccp and those of the element X (as cations) occupy all the octahedral voids. What is the formula of the compound?

Rajkumar Yadav Chemistry 19 Apr, 2019 211 views

What is Close Packed Structures please explain ?

Rajkumar Yadav Chemistry 19 Apr, 2019 55 views

A number consists of three digits which are in G.P. the sum of the right hand and left hand digits exceeds twice the middle digit by 1 and the sum of the left hand and middle digits is two third of the sum of the middle and right hand digits. Find the numbers?

Anonymous User Maths 18 Apr, 2019 942 views