set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

pH of human body varies within the range of

a) 5.5 to 5.8

b) 7.0 to 7.8

c) 6.0 to 6.5

d) 7.0 to 11.0

Question : 2

The chemical formula of baking soda is

a) $NaHCO_3$

b) $CaCO_3$

c) $Ca(OH)_2$

d) $Na_2CO_3$

Question : 3

Which method is employed for obtaining a pure metal?

a) Magnetic separation

b) Froth floatation

c) Electrolytic refining

d) Gravity separation

Question : 4

Antacids are commonly used to get rid of acidity in the stomach. A commonly used antacid is

a) calcium hydroxide

b) sodium hydrogen phthalate

c) magnesium hydroxide

d) manganese acetate

Question : 5

Antacids are

a) Acid

b) Salt

c) Base

d) Buffer

Question : 6

Which of the following is not correct about Baking Soda ?

a) It is a corrosive base

b) It is used in soda acid fire extinguisher

c) It is added for faster cooking.

d) It neutralizes excess acid in the stomach