Explanation

Pakistan opened its first embassy in Iran.

Iran was the first to recognize Pakistan.

Iran was the first to open its embassy in Pakistan.

Iran and Pakistan established relations on 14 August 1947, the day of the independence of Pakistan

Explanation

Heavy is to Light Rough is too Smooth

The opposite of heavy is light, similar to smooth is the opposite of rough

Explanation

The Quran is divided into 30 equal parts called Juz (pl. Ajza) 

The Quran is organized into 114 chapters

Explanation

We use "by" in "swear by the gods"

Because "by" introduces the thing or being, a person is called upon as a witness to their oath or promise.

"Swear by" means to make an oath invoking someone or something as a witness

Explanation

Generally article the is used before a particular direction.

For example:

The east, the west, the north, the south