The building blocks of elements are called:

(A) Atoms
(B) Molecules
(C) Compounds
(D) Isotopes

Q. Who first gave the concept of ‘Atom’ ?
(A) Kapila
(B) Robert Edwards
(C) Kanada
(D) John Dalton

Q. Which of the following was the first organic compound to be synthesised in the laboratory?
(A) Citric acid
(B) Formic acid
(C) Lactose
(D) Urea

Answers:
1. (A) Atoms
2. (D) John Dalton
3. (D) Urea