11.

NH₄COONH₂ (s) $\rightleftharpoons$ 2NH₃ (g) + CO₂ (g) ,if equlibrium pressure is 3 atm for the above reaction .K_p for the reaction is :

• 4

• 27

• 4/27

• 1/27

A radioactive nucleus will not emit :

• alpha and beta rays simultaneously

• beta and gamma rays simultaneously

• gamma and alpha rays

• gamma rays only

Which of the following is most polarised ?

• Kr

• He

• Ar

• Xe

If the Vrms is 30 R^1/2 at 27^oC then calculate the molar mass of gas in kilogram .

• 1 Kg

• 2 Kg

• 0.001 Kg

• 0.002 Kg

The standard molar heat of formation of ethane ,CO₂ and water are respectively - 21.1 , - 94.1 and - 68. 3 kcal .The standard molar heat of combustion of ethane will be :

• - 372 kcal

• 162 kcal

• - 240 kcal

• 183.5 kcal

₇₂X¹⁸⁰ $\stackrel{2\mathrm{\alpha }}{\to }$ $\stackrel{\mathrm{\beta }}{\to }$ $\stackrel{\mathrm{\gamma }}{\to }$ _zX^A , Z and A are :

• 69 , 172

• 172 , 69

• 180 , 70

• 182 , 68

Which of the following is paramagnetic ?

• N₂

• C₂

• N₂⁺

• O₂^2-

Intermolecular hydrogen bonding is strongest in :

• C₂H₅OH

• HF

• H₂O

• CH₃COCH₃

Non - directional orbital is :

• 4p

• 4d

• 4f

• 3s

Which of the following gas is linear ?

• CO₂

• SO₂

• NO₂

• SO₃