Laws of Chemical Combination

IMPORTANT

Laws of Chemical Combination: Overview

The topic describes the main five laws of chemical combination. It covers law of conservation of mass, definite proportions, multiple proportions, Gay Lussac's law of gaseous volumes and Avogadro's Law.

Important Questions on Laws of Chemical Combination

MEDIUM
IMPORTANT

The molecular weight of O 2 and S O 2  are 32 and 64 respectively. At 1 5 ο C and 150 mm of Hg pressure, one litre of O 2 contains ‘N’ molecules. The number of molecules in two litres of S O 2 under the same conditions of temperature and pressure will be :

EASY
IMPORTANT

The molecular formula of hydrogen chloride gas and water vapours as determined using Avogadro's law is

EASY
IMPORTANT

The molecular formula of hydrochloric acid gas determined using Avogadro's law is _____.

EASY
IMPORTANT

Recall the value of Avogadro number used for the determination of molecular formula of a given gas using Avogadro's law.

EASY
IMPORTANT

The molecular formula of hydrochloric acid gas determined using Avogadro's law is HCl.

HARD
IMPORTANT

Illustrate the determination of molecular formula of a given gas using Avogadro's law.

HARD
IMPORTANT

Describe method of determination of atomicity of elementary substances using Avogadro's law.

EASY
IMPORTANT

The _____ of an elementary substance is defined as the number of atoms of the element present in a molecule of that element.

EASY
IMPORTANT

Which of the following statements is known as the Berzelius Hypothesis?

EASY
IMPORTANT

The atomicity of ozone is two.

EASY
IMPORTANT

What is the atomicity of hydrogen, nitrogen and ozone gases?

EASY
IMPORTANT

What do you mean by atomicity of an elementary substances?

EASY
IMPORTANT

Berzelius hypothesis states that equal volumes of all gases under similar conditions of temperature and pressure contain an equal number of molecules. 

EASY
IMPORTANT

Write the statement of Berzelius hypothesis.

EASY
IMPORTANT

Berzelius hypothesis states that equal _____ of all gases under similar conditions of temperature and pressure contain an equal number of atoms. 

MEDIUM
IMPORTANT

When 10 mL of propane (gas) is combusted completely, the volume of CO2(g) obtained in similar condition is:

EASY
IMPORTANT

H2S contains 94.11% sulphur; SO2 contains 50% oxygen and H2O contains 11.11% hydrogen. Thus, 

MEDIUM
IMPORTANT

Two substances I and II of carbon and oxygen have respectively 72.73% and 47.06% oxygen. Hence, they follow:

EASY
IMPORTANT

The volume of one mole of a gas is called _____ .

EASY
IMPORTANT

'The matter can neither be created nor destroyed but one form of matter can be converted into other' the said law is _____ law of thermodynamics.(first/second)