NCERT Solutions for Chapter: Is Matter Around Us Pure?, Exercise 2: Short Answer Questions

Classify the following as Physical property or Chemical property.
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.

Classify the following as Physical property or Chemical property.
Metallic sodium is soft enough to be cut with a knife.

Classify the following as Physical property or Chemical property.
Most metal oxides form alkalis on interacting with water.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non malleable and are coloured.
Name a lustrous non-metal.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, nonmalleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, nonmalleable and are coloured.
The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is known to form the largest number of compounds from the following. (Carbon/Sulphur/Phosphorous)

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, nonmalleable and are coloured.
Name a non-metal which is required for combustion.(Carbon/Oxygen/Nitrogen)