100+ Physics Multiple Choice Questions Answers for Competitive Exams - 1

Question: 1

Write the symbols of the following elements Chlorine, Iron, Silver, Gold?

Chlorine – Cl

Iron – Fe

Silver – Ag

Gold – Au

Question: 2

What is matter?

Anything that occupies space and has mass is called matter.

Question: 3

Define element?

Any pure substance which cannot be broken into two or more pure substances by any physical or chemical means is called element.

Example : Aluminium, Gold.

Question: 4

Define molecule?

The smallest unit of a pure substance which always exists independently and can retain physical and chemical properties of that substance is called a molecule.

Question: 5

Define compound?

A compound is a pure substance formed by the combination of two or more elements in a fixed ratio by mass.

The basic units of a compound are molecules.

Example : Carbon dioxide, Water.

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