World of chemistry

World of chemistry Chemistry

02/08/2026

Which gas is used in the manufacture of nitric acid by the Ostwald process?
A) Oxygen
B) Nitrogen
C) Ammonia
D) Hydrogen

01/08/2026

Which metal is obtained from the ore Galena?
A) Zinc
B) Lead
C) Copper
D) Iron

31/07/2026

Which gas is produced when dilute HCl reacts with sodium carbonate?
A) Hydrogen
B) Carbon dioxide
C) Oxygen
D) Chlorine

31/07/2026

Which metal is commonly used in X-ray shielding?
A) Aluminium
B) Lead
C) Zinc
D) Copper

31/07/2026

Which of the following is a neutral oxide?
A) CO
B) SO₂
C) CaO
D) Na₂O

31/07/2026

Which gas is used for artificial ripening of fruits?
A) Oxygen
B) Ethylene
C) Nitrogen
D) Helium

31/07/2026

Which compound is commonly known as Bleaching Powder?
A) CaOCl₂
B) CaCO₃
C) CaO
D) CaSO₄

30/07/2026

Which alloy is used for soldering electrical wires?
A) Brass
B) Bronze
C) Solder (Lead + Tin)
D) Nichrome

29/07/2026

Which of the following does NOT contain oxygen?

A) Hydrochloric acid (HCl)
B) Nitric acid (HNO₃)
C) Sulfuric acid (H₂SO₄)
D) Acetic acid (CH₃COOH)

29/07/2026

Which gas is responsible for global warming the most among these?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Helium

Address

Dadu

Telephone

+923032410127

Website

Alerts

Be the first to know and let us send you an email when World of chemistry posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share

Category