General Science – Exercise – 3

126. In an atomic nucleus, neutrons and protons are held together by

(a) gravitational forces
(b) exchange forces
(c) coulombic forces
(d) magnetic forces

127. According to Avogadro’s Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .

(a) a molecule
(b) a cation
(c) an anion
(d) an atom

128. How does common salt help in separating soap from the solution after saponification?

(a) By decreasing density of Soap
(b) By decreasing solubility of Soap
(c) By increasing density of Soap
(d) By increasing solubility of Soap

129. Wood is the main raw material for the manufacture of

(a) paint
(b) paper
(c) ink
(d) gun powder

130. Which of the following is a protein?

(a) Natural rubber
(b) Starch
(c) Cellulose
(d) None of these

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