In this section you will find thousands of questions of Chemistry, how to solve each of the questions and the correct answer.
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If the elements X and Y have atomic numbers 11 and 17 respectively, what type of bond can they form?
Dative
Covalent
Ionic
Metallic
Which of the following are evidences for the particulate nature of matter?
I. Evaporation
II. Sublimation
III. Diffusion
IV. Brownian motion
I and III only
II and IV only
I, II and III only
I, II, III and IV
In the reaction 2H2(g) + O2(g) → 2H2O(g), what volume of hydrogen would be left over when 300 cm³ of oxygen and 1000 cm³ of hydrogen are exploded in a sealed tube?
200 cm³
400 cm³
600 cm³
700 cm³
An increase in the pressure exerted on gas at a constant temperature results in
a decrease in the number of effective collisions
a decrease in volume
an increase in the average intermolecular distance
an increase in volume
50 cm³ of gas was collected over water at 10°C and 765 mmHg. Calculate the volume of the gas at s.t.p. if the saturated vapour pressure of water at 10°C is 5 mmHg.
49.19 cm³
48.87 cm³
48.55 cm³
48.23 cm³
