To form water, hydrogen combines with oxygen in the ratio of

Important Questions on Elements, Compounds and Chemical Equations

EASY

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 6 - Elements, Compounds and Chemical Equations>EVALUATE>Q 2

The chemical formula of calcium hydroxide is

EASY

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 6 - Elements, Compounds and Chemical Equations>EVALUATE>Q 3

The valency of nitrate radical is

EASY

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 6 - Elements, Compounds and Chemical Equations>EVALUATE>Q 4

The atomicity of bromine is:

MEDIUM

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 6 - Elements, Compounds and Chemical Equations>EVALUATE>Q 5

$\mathrm{N}\mathrm{a}\mathrm{N}{\mathrm{O}}_3$ is the chemical formula of

MEDIUM

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 6 - Elements, Compounds and Chemical Equations>EVALUATE>Q 1

Differentiate between a molecule of an element and a molecule of a compound.

EASY

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 6 - Elements, Compounds and Chemical Equations>EVALUATE>Q 2

Name the element denoted by the symbol $\mathrm{F}\mathrm{e}$. (Francium / Iron)

MEDIUM

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 6 - Elements, Compounds and Chemical Equations>EVALUATE>Q 3

Define atomicity with an example

MEDIUM

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 6 - Elements, Compounds and Chemical Equations>EVALUATE>Q 4

Write the chemical formula of the compound carbon tetrachloride