91- Which of the following can be used as an acid base indicator by visually impaired student?
(A) Clove Oil
(B) Onion
(C) Litmus
(D) Both A and B
92- Plaster of Paris is made from
(A) Lime stone
(B) Gypsum
(C) Slaked lime
(D) Quick lime
93- Which of the following salts does not contain crystallization?
(A) Washing soda
(B) Blue vitriol
(C) Baking soda
(D) Sulphuric soda
94- Match the following
| 1. Baking soda a. NaHCO3
2. Washing soda b. Na2CO3.1OH2O 3. Plaster of Paris c. CaSO4.1/2H2O |
(A) 1-c, 2-b, 3-1
(B) 1-b, 2-c, 3-a
(C) 1-a, 2-b, 3-c
(D) None of the above
95- …………is acidic in nature.
(A) Apple juice
(B) Tomato
(C) Vinegar
(D) Lime juice
96- …………..is a mineral acid.
(A) Methanoic acid
(B) Hydrochloric acid
(C) Hydrochloric acid
(D) None of the above
97- Range of pH value is
(A) 1-7
(B) 0-14
(C) 7-14
(D) 5-15
98- Reaction of an acid with base is known as
(A) Redox reaction
(B) Combination
(C) Decomposition
(D) Neutralization
99- The gas evolved in a metal acid reaction is
(A) No gas evolved
(B) Oxygen
(C) Hydrogen
(D) Neutral
100- Phenolphthalein’s colour in basic medium is …………but in acid it is ………..
(A) Pink, colourless
(B) Yellow, pink
(C) Colourless, green
(D) Red, Pink
ANSWERS:
91-(D), 92-(B), 93-(C), 94-(C), 95-(A), 96-(B), 97-(B), 98-(D), 99-(C), 100-(A)