Which is lighter than dry air?

(a) Moist air                              (b) SO2

(c) Cl2                                      (d) O2

Concept Videos :-

Concept Questions :-

Introduction to States of Matter

(a) Molar mass of moist air is lesser than dry air.

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Which gas when passed through dilute blood will impart a cherry red colour to the solution?

(a) CO2                               (b) COCl2

(c) NH3                               (d) CO

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Concept Questions :-

Introduction to States of Matter

(d) CO reacts with red colouring heamoglobin molecules in blood to form a complex of cherry red colour.

Difficulty Level:

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The condition of SATP refers for:

(a) 25 $°$C and 2 atm             (b) 25 $°$C  and 1 atm

(c) 0 $°$C  and 2 atm              (d) 25 $°$C  and 1 bar

Concept Videos :-

Concept Questions :-

Introduction to States of Matter

(d) SATP means 1 bar and 25 $°$C .

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Which of the following contains the greatest number of nitrogen atoms ?

(A) 500 ml of 2.0

(B) One mole of ${\mathrm{NH}}_{4}\mathrm{Cl}$

(C)  molecules of ${\mathrm{NO}}_{2}$ gas

(D) 22.4 litres of ${\mathrm{N}}_{2}$ gas at 0ºC and 1 atm.

Concept Videos :-

Concept Questions :-

Introduction to States of Matter

(D).  22.4 litres of ${\mathrm{N}}_{2}$ will be present in 1 mole at 1 atmospheric pressure and 273 K or 0ºC.

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