Explanation

Limestone consists of calcium carbonate,

which has the chemical formula CaCO3.

Calcium carbonate is a chemical compound.

It is a common substance found in rocks as the minerals calcite.

Explanation

If I knew her name, I would tell you means

اگر مجھے اس کا نام معلوم ہوتا تو میں آپ کو بتاتا

The second part of the sentence is in the past tense.

The verb to be used should also be in the same tense.

The past tense of the word "know" is "knew".

Therefore, the correct tense here is past tense and the verb used is "knew".

Explanation

Namaz-e-Istikhara is a prayer offered when Muslims seek guidance from Allah (God) regarding a decision they are facing

Salat became farz on 10th Nabavi.

Explanation

"Beside" means next to or by the side of (the tree is positioned directly adjacent to the wall).

Example: "The tree stands beside the wall." 

Explanation

Obsolete means پرانا یا قدیمی

Recent means  نیا یا جدید

Explanation

Katpana is a cold desert.

Katpana is 2226 meters above altitude. 

Katpana is the 16th largest desert of the world.

Katpana is in Skardu. 

Explanation

This is the second type of Conditional Sentences.

Formula: If + past simple, would/wouldn't + verb

If they had more money, they will buy a new house اگر ان کے پاس زیادہ پیسے ہوتے تو وہ نیا مکان خرید لیتے ہیں

Explanation

The car travels 30 km in the first hour and 32 km in the second hour, total distance = 30 + 32 = 62 km.

Total time = 2 hours, so average speed = 62 ÷ 2 = 31 km/h.

Explanation

Explanation

A gene is the basic physical and functional unit of heredity.

Genes are made up of DNA.