Explanation

• Name: Waldemar Haffkine
• Year: 1892
• Vaccine: Cholera vaccine (first effective form)
• Place of work: India (British India)
• Field: Microbiology / Immunology

Last verified on 23-06-2026

Explanation

• The main purpose of pre-natal ultrasound is to monitor the growth and health of the fetus during pregnancy.
• It helps doctors check the baby’s position, heartbeat, and development.
• It can detect abnormalities or complications early.

Last verified on 23-06-2026

Explanation

• Pakistan conducted a series of nuclear tests on 28 May 1998 at the Chagai test site, in Balochistan.
• 5 Nuclear tests were conducted by Pakistan at 15:15 hrs PST on 28 May 1998.
• The tests were performed at Ras Koh Hills in the Chagai District of Balochistan Province.
• Chagai-I was Pakistan's first public test of nuclear weapons.

Additional information:

• Chagai-II is the codename assigned to the second atomic test conducted by Pakistan, carried out on 30 May 1998.
• These tests followed the Chagai-I series.
• The test site was Kharan Desert, Pakistan.
• The number of tests is 1.

Last verified on 30-03-2026

Explanation

• Jinns are a creation of Allah made from smokeless fire.
• They are invisible to humans but have free will, unlike angels.
• Mentioned in the Quran: Surah Al-Rahman (55:15) and Surah Al-Hijr (15:27).

Last verified on 08-03-2026

Explanation

• Surah At-Tin (التین) means “The Fig” in English.
• Order: 95th Surah
• Verses: 8 Ayahs
• Makki Surah: Revealed in Makkah

Last verified on 23-06-2026

Explanation

Let width = w cm  

Then length = w + 6 cm  

Perimeter of rectangle = 2(length + width)  

2(w + 6 + w) = 48  

2(2w + 6) = 48  

4w + 12 = 48  

4w = 36  

w = 9 cm  

So width = 9 cm, length = 9 + 6 = 15 cm.

Last verified on 23-06-2026

Explanation

For quadratic ax² + bx + c = 0:  

Sum of roots = -b/a  

Product of roots = c/a  

Take a = 1, then:  

-b = sum = -2 → b = 2  

c = product = 3  

So equation: x² + 2x + 3 = 0

Last verified on 23-06-2026

Explanation

Inverse proportion: y ∝ 1/x, so y × x = constant

Given: 10 × 2 = 20

So when x = 5 ⇒ y = 20 ÷ 5 = 4

Last verified on 23-06-2026

Explanation

1962 Constitution

• System: Presidential System
• Introduced by: General Ayub Khan
• Legislature: National Assembly + Provincial Assemblies
• Election system: Indirect (Basic Democracies)

Additional information:

1956 Constitution

• System: Parliamentary System
• Head of State: President (ceremonial)
• Head of Government: Prime Minister

1973 Constitution

• Head of Government: Prime Minister (executive authority)
• System: Parliamentary System (Federal Parliamentary Democracy)
• Head of State: President (ceremonial role)

Last verified on 23-06-2026

Explanation

• ROM (Read Only Memory) is a non-volatile storage device.
• It stores data permanently even without power.

Additional information:

• RAM (Random Access Memory) is a volatile storage device.
• It loses data when power is off.

Last verified on 17-06-2026