Explanation

• Alexander Graham Bell is credited as the inventor of the telephone.
• He was awarded the first successful patent for it.
• The telephone was invented in 1876.
• Bell made the first-ever telephone call to his assistant Thomas Watson.

Last verified on 31-03-2026

Explanation

• The Durand Line was established as the official border between British India and Afghanistan.
• It was drawn in 1893.
• British representative: Sir Mortimer Durand
• Afghan ruler: Amir Abdur Rahman Khan
• It later became the international border between Pakistan and Afghanistan.
• Length: Around 2,640 km

Last verified on 09-06-2026

Explanation

• The largest river in Pakistan is the Indus River.
• It is the National River of Pakistan.

Additional information:

• The Indus River starts in Tibet.
• It originates from the Mansarovar lake.
• They flow through India, Pakistan.
• It finally falls into the Arabian Sea near Karachi.
• They start making a delta near the city of Thatta.
• The old name of the Indus River was Sindhu.
• There are 6 Barrages constructed in the Indus River.
• The length of the Indus River is 3,180 km.
• The 2nd source of Indus River is Gar Tsangpo.
• The upper Indus Plain starts from Kalabagh.
• The upper Indus Plain ends at Mithankot.

Last verified on 10-07-2026

Explanation

• A lactometer is used to measure the purity and density (thickness) of milk.
• It checks if milk has been adulterated with water by measuring specific gravity.
• Works on the principle of buoyancy.
• Pure milk specific gravity: 1.028–1.032 at 15°C

Last verified on 16-03-2026

Explanation

• Muslim Bagh is a town in Killa Saifullah District, Balochistan.
• It is famous for Chromite deposits.
• Located at an altitude of about 1,787 meters (5,863 ft).
• Formerly known as Hindu Bagh.
• Chromite is used in stainless steel production.

Last verified on 02-05-2026

Explanation

• Red Sea Location: Between Arabian Peninsula (Asia) and Northeastern Africa
  • Type: Sea (arm of the Indian Ocean)
  • Connection to Ocean: Via Bab-el-Mandeb Strait
  • Distinct Feature: Unlike the Caspian or Aral Seas, it has direct connection to the ocean
  • Length: ~2,300 km long
  • Borders: Egypt, Sudan, Eritrea (Africa) and Saudi Arabia, Yemen (Asia)

Last verified on 10-02-2026

Explanation

Here 'yesterday' shows something happened in the past.

This sentence is also simple.

We generally use second form of verb in simple sentence of Past Indefinite Tense. 

Note: Do is the first, did is the second while done is the third form of verb. 

We did a lot of work yesterday means کل ہم نے بہت سارا کام کیا

Explanation

The intensity of earthquake is measured by Richter Scale.

Richter Scale was invented in 1935.

Explanation

New York is also known as the City of Sky Scrapers.

New York City is renowned for the concentration of high-rise buildings, commonly known as "the skyscrapers".

New York is the most populous city in the United States.

New York, a constituent state of the United States of America.

Explanation