Metal And Its Compounds - Study Mode

[#271] Which one of the following statements is correct?
Correct Answer

(B) Calcium carbonate is an ingredient of toothpaste

[#272] The first metal used by man was
Correct Answer

(C) copper

[#273] Gas produced with the reaction of the soda with hydrochloric acid.
Correct Answer

(C) Carbon dioxide

[#274] Malachite is an ore of . . . . . . . .?
Correct Answer

(A) copper

[#275] Which of the following is lighter than water?
Correct Answer

(B) Sodium