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

• Isobars are atoms of different elements.
• They have same mass number but different atomic number.
• They show different chemical properties but same nuclear mass.
• Example: Argon-40 and Calcium-40 both have mass number 40 but different atomic numbers.

Last verified on 07-05-2026

Explanation

• Battle: Badr
• Year: 2 AH (624 AD)
• Sahabi: Abu Ubaidah ibn al-Jarrah (RA)
• Father: Fought against Muslims (Quraysh side)
• Principle shown: Faith above blood relation

Last verified on 27-06-2026

Explanation

• The BISP is a federal unconditional cash transfer poverty reduction program in Pakistan.
• BISP stands for Benazir Income Support Programme.
• It was launched in 2008.

Last verified on 01-04-2026

Explanation

• State: Bahawalpur
• Founded: 1748 by Nawab Bahawal Khan I
• Accession to Pakistan: Signed on 5 October 1947, accepted on 9 October
• Location: Punjab, Pakistan
• Geography: Mostly consists of deserts

Last verified on 16-01-2026

Explanation

• Main Cause: Freon / CFCs
• Effect: Breaks down O₃ molecules → more UV-B radiation
• Other Contributors: Halons, carbon tetrachloride
• Result: Skin cancer, cataracts, climate impact

• The Montreal Protocol (1987) aimed to reduce CFC emissions
• Ozone layer protects Earth from harmful ultraviolet rays

Explanation

Slide transitions can be applied to the current slide, previous slide, or new slide.

Transitions can be set to occur when entering or exiting any of these slides.

Explanation

On a hill overlooking the Spanish city of Granada stands the Alhambra, a palace built by princes belonging to the Muslim Nasrid dynasty (1238–1492) in the 14th century.

Explanation

Total marks of 10 students = 10 × 80 = 800

Total marks of 15 students = 15 × 85 = 1275

Total marks of 5 new students = 1275 - 800 = 475

Explanation

Area = Length × Width

30 = 5 × Width

Width = 30 / 5

Width = 6