Explanation

Pakistani squash player Jahangir Khan became a legend in his sport by going undefeated for five years.

He won world open title six times.

He also won 555 matches.

Explanation

Chemical reactions that take place inside living things are called biochemical reactions. 

An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process.

Explanation

320/4=80

Explanation

It is made of O3 

Oxygen layer in atmosphere

Ozone protects us from the harmful ultraviolent radiations of the sun.

Ozone formula : O3

Explanation

She has not been working for two hours

وہ دو گھنٹے سے کام نہیں کر رہی۔

Explanation

Use a comma before while in the middle of a sentence when you mean “whereas” or “although.

Explanation

The device that is used to measure temperature is called Thermometer .

Temperature measurement (also known as thermometry) describes the process of measuring a current local temperature for immediate or later evaluation. 

Explanation

Given:

Radius = 5 meters 

Formula:

Diameter =radius * 2

Solution:

Diameter = 5*2

= 10 meters 

Explanation

Given:

Diameter = 5 meters 

Formula:

Radius=diameter /2

Solution:

= 5/2

= 2.5 meters 

Explanation

It is  Exclamatory Sentence due to sign / mark of Exclamation (!)