Category: Chemistry MCQs

(A) Copper, Nickel
(B) Copper, Tin
(C) Copper, Silver
(D) Copper, Zinc

Q. The archaeological period in which bronze was the hardest metal in widespread use is known as:
(A) Bronze Age
(B) Bronze Period
(C) Bronze Era
(D) None of these

Q. Brass is an alloy of:
(A) Copper, Nickel
(B) Copper, Tin
(C) Copper, Silver
(D) Copper, Zinc

Answers:
1. (B) Copper, Tin
2. (A) Bronze Age
3. (D) Copper, Zinc

(A) Copper and Zinc
(B) Tin and Zinc
(C) Copper and Tin
(D) Iron and Zinc

Answer: (C) Copper and Tin

Q. Brass is an alloy of:
(A) Copper and Zinc
(B) Tin and Zinc
(C) Copper and Tin
(D) Iron and Zinc

Answer: (A) Copper and Zinc

Q. What is the percentage of tin in Bronze alloy?
(A) 12 – 12.5 %
(B) 15 – 15.5 %
(C) 18 – 18.5 %
(D) 21 – 21.5 %

Answer: (A) 12 – 12.5 %

(A) Sodium Nitrate
(B) Dilute Acetic acid
(C) Chloride of lime
(D) Calcium

Answer: (B) Dilute Acetic acid

Q. What is the chemical formula of vinegar (acetic acid) ?
(A) CH₃COOH
(B) CH₂CO₂OH
(C) CH₄CO₃OH
(D) none of these

Answer: (A) CH₃COOH

Q. what is the chemical name of water?
(A) Hydrogen oxide
(B) Dihydrogen monoxide
(C) Hydrogen peroxide
(D) None of these

Answer: (B) Dihydrogen monoxide

(A) Methane hydrate
(B) Liquid Nitrogen
(C) Solid Carbondioxide
(D) Frozen Water

Answer: (C) Solid Carbondioxide

Q. What is the chemical formula of dry ice?
(A) CO
(B) CO₂
(C) C₂O₂
(D) CO₃

Answer: (B) CO₂

Q. Which acid is present in the milk?
(A) Lactic acid
(B) Oxalic acid
(C) Malic acid
(D) Citric acid

Answer: (A) Lactic acid

(A) Insecticides
(B) Rodenticides
(C) Fungicides
(D) Herbicides

Answer: (B) Rodenticides

Q. Chemicals used to control unwanted plants, also known as weedkillers are:
(A) Insecticides
(B) Rodenticides
(C) Fungicides
(D) Herbicides

Answer: (D) Herbicides

Q. Chemical compounds or biological organisms used to kill parasitic fungi or their spores and inhibits their growth are:
(A) Insecticides
(B) Rodenticides
(C) Bactericides
(D) Fungicides

Answer: (D) Fungicides