Match the physical quantities with their correct SI units. List-I List-II (A) Planck's constant (I) kg m s - 2 (B) Torque (II) kg - 1 m 3 (C) Weight (III) m 2 kg s - 1 (D) Specific volume (IV) kg m 2 s - 2 The correct match is

A = III , B = IV , C = I , D = II

A = II , B = IV , C = I , D = III

A = IV , B = I , C = II , D = III

A = II , B = III , C = I , D = IV

Calculate the specific heat capacity C v of a gaseous mixture consisting of v 1 moles of a gas of adiabatic exponent γ 1 and v 2 moles of another gas of adiabatic exponent γ 2 .

R v 1 + v 2 v 1 γ 1 - 1 + v 2 γ 2 - 1

R v 1 + v 2 v 1 γ 2 - 1 + v 2 γ 1 - 1

R v 2 + v 1 v 1 γ 2 - 1 + v 2 γ 1 - 1

R v 2 + v 1 v 2 γ 2 - 1 + v 1 γ 1 - 1

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Important Questions on Chemical Bonding and Molecular Structure

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The number and type of bonds in

C_{2}^{2 -}

ion in

{CaC}_{2}

are:

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The value of

n \in I

for which the function

f (x) = \frac{\sin n x}{\sin (\frac{x}{n})}

has

4 π

as its period is:

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

A monoatomic gas of mass

4.0 u

is kept in an insulated container. The container is moving with velocity

30 m s^{- 1}

. If the container is suddenly stopped then a change in temperature of the gas (

R =

gas constant) is

\frac{x}{3 R}

. Value of

x

is,

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The number of sigma

(σ)

and pi

(π)

bonds in pent-

2

-en-

4

-yne is:

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Match the physical quantities with their correct $SI$ units.

	List-I		List-II
(A)	Planck's constant	(I)	$kg m s^{- 2}$
(B)	Torque	(II)	${kg}^{- 1} m^{3}$
(C)	Weight	(III)	$m^{2} kg s^{- 1}$
(D)	Specific volume	(IV)	$kg m^{2} s^{- 2}$

The correct match is

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The correct thermodynamic conditions for the spontaneous reaction at all temperatures is:

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

2 kg

of a monoatomic gas is at a pressure of

4 \times 10^{4} N m^{- 2}

. The density of the gas is

8 kg m^{- 3}

. What is the order of energy of the gas due to its thermal motion?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Calculate the specific heat capacity C_v of a gaseous mixture consisting of v₁ moles of a gas of adiabatic exponent

γ_{1}

and

v_{2}

moles of another gas of adiabatic exponent

γ_{2}

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Starting with the same initial conditions, an ideal gas expands from volume $V_{1}$ to $V_{2}$ in three different ways. The work done by the gas is $W_{1}$ if the process is purely isothermal, $W_{2}$ if purely isobaric and purely adiabatic. Then
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EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Internal energy is sum of

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

If gas expands at constant temperature and pressure, then its

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The percentage change in internal energy, when a gas is cooled from

927 ° C

27 ° C

, is

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

A cyclic process ABCD is shown in the following P-V diagram. Which of the following curves represents the same process?

Question Image

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

For the reaction (at

1240 K

and

1

atm.)

C a C O_{3} (s) \to C a O (s) + C O_{2} (g)

∆ H = 176

kJ/mol;

∆ E

will be

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The final volume of a system is equal to the initial volume in a certain process. Is the work done by the system necessarily zero? Is it necessarily nonzero?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

In the figure, a certain mass of gas traces three paths

1, 2, 3

from state

A

to state

B

. If work done by the gas along three paths are

W_{1}, W_{2}, W_{3}

respectively, then
Question Image

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

The outer surface of a cylinder containing a gas is rubbed vigorously by a polishing machine. The cylinder and its gas become warm. Is the energy transferred to the gas heat or work?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Among the following gases, the one which possesses the largest internal energy is

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

Which one of the following statements is true, in respect of the usual quantities represented by

∆ Q, ∆ U

and

∆ W.

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Valence Bond Theory

An ideal gas is taken around the cycle $A B C A$ as shown in the $p V$ diagram

Question Image

The total work done by the gas during the cycle is

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Important Questions on Chemical Bonding and Molecular Structure

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