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No. of posts: 355

Question

The equilibrium constant (KC) for the reaction N2(g) + O2(g) —–> 2NO(g) at temperature T is 4 x 10–4. The value of KC for the reaction, NO(g) —–> ½ N2(g) + ½ O2(g) at the same temperature is :

(1) 0.02

(2) 2.5 x 102

(3) 4 x 10–4

(4) 50.0

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Question

According to Freundlich adsorption isotherm, which of the following is correct ?

(1) x/m α P0

(2) x/m α P1

(3) x/m α P(1/n)

(4) All the above are correct for different ranges of pressure

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Question

Which of the following on thermal decomposition yields a basic as well as an acidic oxide ?

(1) NaNO3

(2) KClO3

(3) CaCO3

(4) NH4NO3

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Question

The standard reduction potentials for Zn2+/ Zn, Ni2+/ Ni, and Fe2+/ Fe are –0.76, –0.23 and –0.44 V respectively. The reaction X + Y2+ —–> X2+ + Y will be spontaneous when :

(1) X = Ni, Y = Fe

(2) X = Ni, Y = Zn

(3) X = Fe, Y = Zn

(4) X = Zn, Y = Ni

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Question

The species which can best serve as an initiator for the cationic polymerization is :

(1) LiAlH4

(2) HNO3

(3) AlCl3

(4) BuLi

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Question

The density of a solution prepared by dissolving 120 g of urea (mol. Mass = 60) in 1000g of water is

1.15 g/mL. The molarity of this solution is :

(1) 0.50 M

(2) 1.78 M

(3) 1.02 M

(4) 2.05 M

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Question

The incorrect expression among the following is :

(1) ∆Gsystem / ∆Stotal = -T

(2) In isothermal process, wreversible = -nRTln(Vf/Vi)

(3) ln K = (∆H0 – T∆S0)/RT

(4) K = e-∆G/RT

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Question

Which of the following compounds can be detected by Molisch’s test ?

(1) Nitro compounds

(2) Sugars

(3) Amines

(4) Primary alcohols

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Question

The molecule having smallest bond angle is :

(1) NCl3

(2) AsCl3

(3) SbCl3

(4) PCl3

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Question

Lithium forms body centred cubic structure. The length of the side of its unit cell is 351 pm. Atomic radius of the lithium will be :

(1) 75 pm

(2) 300 pm

(3) 240 pm

(4) 152 pm

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