Acids Bases and...

Match the following with correct response.
(1) Strongly alkaline
(2) Weakly alkaline
(3) Weakly acidic
(4) Strongly acidic

(A) Yellow
(B) Violet
(C) Red
(D) Blue

Match the following with correct response.
(1) Sodium carbonate
(2) Plaster of Paris
(3) calcium oxychloride
(4) Sodium bicarbonate

(A) Fire extinguishers
(B) For ornamental casting
(C) For water softening
(D) For bleaching wool

Match the following with correct response.
(1) Bleaching powder
(2) Baking soda
(3) Washing soda
(4) Plaster of Paris

(A) Calcium oxychloride
(B) Sodium carbonate
(C) Sodium bicarbonate
(D) Calcium sulphate hemihydrate

Match the following with correct response.
(1) Soluble salt
(2) Normal salt
(3) Hydrated salt
(4) Insoluble Salt

(A) NaCl
(B) BaSO₄
(C) CuSO₄. 5H₂O
(D) KNO₃

What is the pH of a solution which turns red litmus blue?
A. 2
B. 6
C. 8
D. 10

Which of the following statements are correct?
A. Chemical name of bleaching powder is calcium oxychloride.
B. Bleaching powder is used for sterilization of drinking water.
C. Bleaching powder is alkaline in nature hence it is used as antacid.
D. Bleaching powder is manufactured by Hasen Clever process.

Which of the following properties are shown by dilute hydrochloric acid-
A. It turns blue litmus red
B. It turns red litmus blue
C. It reacts with zinc metal and a gas evolves
D. It reacts with solid sodium carbonate to give brisk effervescence

Sodium carbonate
A. is a transparent crystalline white solid
B. Has the chemical formula Na₂CO₃.10H₂O
C. Gives acidic solution when dissolves in water
D. Prepared by reacting with chlorine

Which of the following statements are correct abount an aqueous solution of an acid and of a base?
A. lower the pH weaker the base
B. Lower the pH stronger the base
C. higher the pH stronger the acid
D. higher the pH weaker the acid