Ch - Elements and Compounds

Front

Pure substances are the substances that have a fixed composition and are homogeneous.

Back

True

Front

The substance shown in the picture is: Metal, Non-metal, Metalloids, Noble gas

Back

Non-metal

Front

Elements are made up of only one type of atoms.

Back

True

Front

Which metal exists in liquid state at room temperature? Options: Sodium, Mercury, Potassium, Gold

Back

Mercury

Front

Diamond is the hardest substance found on the Earth. Is it metal, non-metal or metalloid?

Back

non-metal

Front

Which of the following is used for disinfection of drinking water?
Options: Nitrogen, Oxygen, Hydrogen, Chlorine

Back

Chlorine

Front

Non-metal used in colourful and bright signboards seen at night markets.

Back

Neon

Front

Name the element which has properties of both metals and non-metals.

Back

metalloids, metalloid

Front

Why are noble gases also called inert gases?

Back

They do not react with other elements.

Front

What does the chemical symbol represent?

Back

The name of the element and the number of atoms in an element.