Question

1
()
Objective Questions
1. Substances which are sour in taste are
called -
(a) Bases (b) Acids
(c) Salt (d) None of these ()
2. Which gas is released when acids
reacts with metals ?
(a) Carbon dioxide
(b) Hydrogen
(c) Oxygen
(d) All of these
( )
3. Which is artificial indicator in
following-
(a) Petals of china rose
(b) Turmeric
(c) Litmus paper
(d) Phenolphthalein
4. Generally salts are -
(a)Acidic (b) Bases
(C) Neutral (d) None of these ()
5. Which one is the chemical formula of
sodium hydroxide -
(a) HNO, (b) NaOH
(c) H.SO
(d) NaCl
6. In the following, which substances are
neutral in nature
(a) Salt
(6) Acid
(c) Base (d) All
()
7. Gas which is used to blow out flame
is-
(a) Oxygen (b) Nitrogen
(c) Carbon dioxide
(d) Ammona
8. Plánt dyes are converted into which
colour by bases -
(a) Red (b) Blue
(c) Blue & Red (d) Green​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

1. b. acid

2. b. hydrogen

3. c. litmus paper

4. c. neutral

5. b. NaOH

6. a. salt

7. a. Oxygen

8. b. blue