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

Important Questions on Elements, Compounds and Chemical Equations

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

EASY

7th CBSE

IMPORTANT

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

The polyatomic molecule of an element with atomic number $15$ is ${\mathrm{P}}_{\mathrm{n}}$. here, the value of $\mathrm{n}$ is 

MEDIUM

7th CBSE

IMPORTANT

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

What is a chemical equation? Give an example.

MEDIUM

7th CBSE

IMPORTANT

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

Differentiate between compounds and mixtures by giving suitable examples.

MEDIUM

7th CBSE

IMPORTANT

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

Balance the following chemical equation.
$\mathrm{A}\mathrm{g}\mathrm{l}+\mathrm{N}{\mathrm{a}}_2\mathrm{S}\to \mathrm{A}{\mathrm{g}}_2\mathrm{S}+\mathrm{N}\mathrm{a}\mathrm{l}$