Explanation

• Planet: Uranus
• Type: Ice Giant
• Temperature: Around −224°C (coldest recorded)
• Position from Sun: 7th planet
• Composition: Hydrogen, helium, methane
• Discovered: William Herschel in 1781

Last verified on 16-05-2026

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

• Vitamin A deficiency → Night blindness (Nyctalopia)
• Vitamin A is important for vision and immune function.

Additional information:

• Vitamin K is essential for blood clotting.
• Vitamin D helps in calcium absorption and bone mineralization.
• Vitamin B1 supports nerve function and energy metabolism.

Last verified on 01-02-2026

Explanation

• The chemical name of chalk is Calcium carbonate.
• Its chemical formula is CaCO₃.
• It is a soft, white mineral.
• Commonly used in blackboard chalk and limestone.
• Found naturally in rocks and marine shells.

Last verified on 30-04-2026

Explanation

• Vitamin A is essential for vision, skin health, and immune function.
• Its deficiency can lead to night blindness (poor ight vision) and other health problems.

Additional information:

• Dry skin and eyes
• Impaired immune function
• Poor wound healing
• Increased risk of respiratory and urinary tract infections

Last verified on 17-01-2026

Explanation

• Chronometer is a highly precise time-measuring instrument.
• It is often used in navigation and scientific experiments.
• It is designed to measure time accurately, even under varying conditions.
• Chronometers played a key role in determining longitude at sea.

Last verified on 03-04-2026

Explanation

• Asthma is a chronic respiratory disease affecting the airways of the lungs.
• It causes narrowing and inflammation of the air passages, leading to difficulty in breathing.
• Common symptoms include wheezing, coughing, chest tightness, and shortness of breath.

Last verified on 02-04-2026

Explanation

• Isaac Newton (1642–1727) was an English physicist and mathematician.
• He formulated the laws of motion and law of universal gravitation.
• His work laid the foundation for classical mechanics.

Last verified on 02-04-2026

Explanation

• Average Distance: 3,84,400 km
• Orbit Period: 27.3 days
• Moon Diameter: 3,474 km
• Earth Diameter: 12,742 km
• Closest Point (Perigee): ~363,300 km
• Farthest Point (Apogee): ~405,500 km

Last verified on 01-04-2026

Explanation

• Calcium phosphate, specifically hydroxyapatite, is the main component of bones and teeth.
• It is a calcium salt of phosphoric acid.
• It is the primary mineral constituent of bone tissue, making up about 70-80% of bone dry weight.
• Calcium phosphate gives bones and teeth their strength and rigidity.

Last verified on 31-03-2026