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objective Ques (158 results)
31)

One mole of which of the following has the highest entropy?

JEE Physics
A)

Liquid nitrogen

B)

Hydrogen gas

C)

Mercury

 

D)

Diamond

32)

Gibb's free energy G, enthalpy H and entropy S are interrelated as in 

JEE Physics
A)

G = H + TS

B)

 G = H - TS

C)

 G - TS = H

 

D)

 G = S = H

33)

Which is a condition for spontaneous ?

JEE Physics
A)

∆G < 0

B)

∆G = 0

C)

∆G > 0

 

D)

∆G ≥ 0

34)

In evaporation of water ∆H and ∆S are

JEE Physics
A)

+ , +

B)

+, -

C)

- , +

D)

 - , -

35)

Hess's law states that

JEE Physics
A)

the standard enthalpy of an overall reaction is the sum of the enthalpy changes in individual reactions

 

B)

enthalpy of formation of a compound is same as the enthalpy of decomposition of the compound into constituent elements, but with opposite sign

C)

at constant temperature the pressure of a gas is inversely proportional to its volume

D)

the mass of a gas dissolved per litre of a solvent is proportional to the pressure of the gas in equilibrium with the solution.

36)

Two electrons occupying the same orbital are distinguished by

JEE Physics
A)

 Principal quantum number

B)

 Magnetic quantum number

C)

 Spin quantum number

D)

 Azimuthal quantum number

37)

For a f-orbital the values of m are

JEE Physics
A)

- 1, 0, + 1

B)

0,+ 1, + 2, + 3

C)

-2, -1, 0, + 1,+ 2

 

D)

-3,- 2, -1, 0,+ 1,+ 2,+ 3

38)

Impossible orbital among the following is

JEE Physics
A)

 3f

 

 

B)

 4d

C)

2s

D)

2p

39)

What is the maximum numbers of electrons that can be associated with the following set of quantum numbers?

n = 3, l = 1 and m = –1

 

JEE Physics
A)

6

B)

4

C)

2

D)

10

40)

Maximum number of electrons in a subshell with :

l = 3 and n = 4 is :

JEE Physics
A)

14

B)

12

C)

16

D)

10

E)

17

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