Explanation

• Battery is a device that converts chemical energy into electrical energy.
• Batteries work by using a galvanic cell.
• It is an electrochemical device made up of two electrodes and an electrolyte solution.

Last verified on 16-03-2026

Explanation

• The chemical formula for tetrafluoroethylene is C₂F₄.

Additional information:

• Chemical name: Polytetrafluoroethylene (PTFE)
• Monomer: Tetrafluoroethylene
• Notable property: Highly non-stick surface, often used in cooking utensils

Last verified on 14-11-2026

Explanation

Pattern: Each letter is replaced by its position in the alphabet, then joined.

A=1, B=2, C=3, D=4, G=7, O=15, T=20

Check:  

CAT → C=3, A=1, T=20 → 3120 ✓  

DOG → D=4, O=15, G=7 → 4157 ✓  

So BAT:

B=2, A=1, T=20 → 2120

Last verified on 13-06-2026

Explanation

• The Battle of Badr was fought in the year 2 AH (After Hijrah)
• Islamic Date: 17 Ramadan, 2 AH
• Gregorian Date: March 13, 624 CE
• Place: Badr (near Madinah)
• Between: Muslims and Makkans (Quraysh)
• Muslim Leader: Muhammad (SAW)
• Muslims: around 313 soldiers
• Number of Muslim martyrs: 14
• Quraysh Army: around 1000 soldiers
• Muslim horses: 2
• Muslim camels: around 70

Last updated by NA on 09-09-2026

Explanation

• UNO Founded: 24 October 1945 (after World War II 1939–1945)

Additional information:

• UNO Stands for: United Nations Organization
• Headquarters: Manhattan, New York City
• Member States: 193 countries
• Official Languages (6): Arabic, Chinese, English, French, Russian, Spanish
• Motto: “It’s your world!” (commonly used awareness slogan)
• Pakistan Joined UNO: 30 September 1947

Last verified on 10-06-2026

Explanation

In indirect speech, “had gone” is the past perfect form of “have gone.”

Therefore, the direct version correctly matches as “Where have the sparrows gone?”

Last verified on 14-11-2026

Explanation

اردو ترکی زبان کا لفظ ہے جس کے بنیادی لغوی معنی لشکر، فوج، چھاؤنی، یا شاہی پڑاؤ کے ہیں۔

ماخذ: یہ لفظ ترکی زبان کے لفظ 'اوردو'  سے نکلا ہے۔

تسمیہ:

مغل دور میں دہلی کے شاہی کیمپ یا فوجیوں کے بازار کو "اردوئے معلیٰ" (اعلیٰ لشکر گاہ) کہا جاتا تھا،

اور وہاں بولی جانے والی زبان "زبانِ اردوئے معلیٰ" (لشکری زبان) کہلائی، جو وقت کے ساتھ صرف "اردو" رہ گئی۔

Last updated question by NA on 11 May 2026

Explanation

• LAN stands for Local Area Network.
• It is a network that connects devices within a limited geographical area.
• LAN is commonly used in homes, schools, laboratories, university campuses, and office buildings.
• It provides high-speed communication and resource sharing between connected devices.

Additional information:

• MAN: Metropolitan Area Network – Covers a city or metropolitan area
• WAN: Wide Area Network – Covers a large geographical area (countries/continents)

Last verified on 07-07-2026

Explanation

• Amylase is an enzyme that catalyzes the hydrolysis of starch into sugars.
• All amylases are glycoside hydrolases.
• It is used in breadmaking.

Additional information:

Protease:

• It is an enzyme that catalyzes proteolysis.

Lipase:

• It is an enzyme that catalyzes the hydrolysis of fats.

Peptidase:

• It is an enzyme that breaks down peptides into amino acids.

Last verified on 13-11-2026

Explanation

• Neither of the options is suitable.
• “Neither” is singular, so it takes a singular verb.
• “Options” is plural in form, but after “neither of,” the verb agrees with neither (singular).
• Therefore, correct structure is: Neither + is.

Last verified on 06-06-2026