CBSE Class 10 Chemistry (NCERT Science)
Acids, Bases and Salts - Multiple Choice Questions (MCQ)
Covering MCQ for NCERT Science (Chemistry) and Practical Skills in Science for CBSE Examination of Class X
1: The
colour of neutral litmus solution is
(a) red (b) blue (c) purple (d) yellow
2: Which
of the following indicators is an olfactory indicator?
(a) litmus (b) vanilla (c) turmeric (d)
phenolphthalein
3: Which one is suitable method to find the accurate pH value?
(a) pH meter (b) pH paper (c)
Universal indicator (d) Litmus solution
4:
Which one of the following statements is correct about universal indicator?
(a) It is a mixture of HCl and NaOH
(b) It is a mixture of many indicators
(c) It is a solution of phenolphthalein in
alcohol
(d) It is a solution of phenolphthalein in
water.
5:
Which of the following properties are shown by dilute HCl?
(1) It turns blue litmus red
(2) It turns red litmus blue
(3) It reacts with zinc and a gas is
evolved
(4) It reacts with solid sodium carbonate
to give brisk effervescence
(a) 1 and 2 (b) 1 and 3 (c) 1, 3 and 4 (d)
2, 3 and 4
6: A teacher gave two test tubes – one containing water and the other containing
sodium hydroxide solution to two students. Then he asked them to identify the
test tube containing sodium hydroxide solution. Which one of the following can
be used for correctly identifying the test tube containing the solution of
sodium hydroxide?
(a) Blue litmus (b) Red litmus (c) Sodium
carbonate solution (d) Dilute HCl
7: Metallic
oxides are ________ in nature, but non-metallic oxides are __________ in
nature. The information in which alternative completes the given statement?
(a) neutral, acidic (b) acidic, basic (c)
basic, neutral (d) basic, acidic
8: Two
drops each of lemon juice, hydrochloric acid and acetic acid were added
separately to blue litmus solution. Which of the following samples will change
the color of the litmus?
(a) Lemon juice (b) Acetic acid (c) HCl (d)
Each one
9: Which
gas turns lime water milky?
(a) H2 (b) N2 (c) CO2
(d) SO2
10: The
water of crystallization of gypsum is
(a) 4 (b) 3 (c) 2 (d) 1
11: The
pH values of distilled water, lemon juice, sodium bicarbonate were measured
using pH paper. What is the correct decreasing order of pH values?
(a) water > lemon juice > sodium
carbonate
(b) sodium carbonate > water > fruit
juice
(c) lemon juice > water > sodium
carbonate
(d)
water > sodium carbonate > fruit juice
12:
When a drop of unknown solution X is placed on a strip of pH paper, a deep red
colour is produced. This sample is which one of these?
(a) NaOH (b) HCl (c) Water (d) CH3COOH
13: A
student tests a sample drinking water and reports its pH value as 6 at room
temperature. Which one of the following might have been added in water?
(a) Calcium
chloride (b) Sodium chloride (c) Sodium bicarbonate (d) Bleaching powder
14:
Solid sodium bicarbonate was placed on a strip of pH paper. The color of the
strip
(a) turned red (b) did not change (c)
turned green and slightly yellow (d) turned pink
15:
Four drops of red litmus solution were added to each of the following samples.
Which one turns red litmus blue?
(a) Alcohol (b) Distilled water (c) Sodium
hydroxide sol (d) HCl
16:
Which acid is produced in our stomach?
(a) HCl (b) H2SO4 (c)
Nitric acid (d) Acetic acid
17: Which
formula represents bleaching powder?
(a) Ca(OH)2 (b) CaOCl2
(c) CaCl2 (d) CaO
18: Which
of the following compounds is used in soda-acid fire extinguishers?
(a) calcium hydroxide (b) calcium carbonate
(c) sodium hydrogen sulphate (d) sodium hydrogen carbonate
19: Which
one of the following is the correct method of finding the pH of a solution?
(a) heat the solution in a test tube and
expose the pH paper to the vapours formed.
(b) pour few drops of solution from the
test tube on the pH paper
(c) drop the pH paper in the solution
(d) put a drop of solution on the pH paper
using a dropper
20: The
pH value of a solution is in the range of 6 - 8. What is the color developed
when a student adds 3 drops of universal indicator in the solution?
(a) Red (b) Blue (c) Green (d) Orange
21: The
pH of which of the following samples can not be found directly using pH paper?
(a) Lemon juice (b) Dilute HCl (c) Solid
sodium bicarbonate (d) Solution of a detergent.
22: Which
of the following natural sources contains oxalic acid?
(a) lemon (b) orange (c) tomato (d)
tamarind
23: The
acid found in an ant sting is
(a) acetic acid (b) citric acid (c)
tartaric acid (d) methanoic acid
24: To
relieve pain caused due to acidity, we can take
(a) sour milk (b) lemon juice (c) orange
juice (d) milk of magnesia
25: What
are the products obtained when potassium sulphate reacts with barium iodide in
an aqueous medium?
(a) KI and BaSO4 (b) KI, Ba and
SO2 (c) K, I2 and BaSO4 (d) K, Ba, I2
and SO2
26: The
concentration of H+ ions in a solution can be measured using
(a) a pH paper (b) a litmus paper (c)
methyl orange (d) phenolphthalein
27: Which
of the following solutions does not conduct electricity?
(a) C6H12O6
(b) Ca(OH)2 (c) H2SO4 (d) HCl
28: A
colorless and odorless gas is liberated when hydrochloric gas is added to a
solution of washing soda. What is the name of the gas?
(a) CO2 (b) NO2 (c)
SO2 (d) SO3
29: A
liquid sample is suspected to be either an acid or water. You are provided a
strip of red litmus paper. How would you confirm the nature of the sample?
(a) dip
the litmus paper in the sample
(b) put
four drops of liquid sample on the litmus paper
(c) dip
the litmus paper in a dilute solution of NaOH and then put two drops of the
liquid sample on it.
(d) dip
the litmus paper in a dilute solution of NaCl and then three drops of liquid
sample on it.
30: A
strong acid HA reacts with a strong base, BOH to form a salt, AB. What would be
the nature of salt AB?
(a) basic (b) neutral (c) weakly basic (d)
strongly acidic
31: Which
of the following salts is basic in nature?
(a) NH4NO3 (b) Na2CO3
(c) Na2SO4 (d) NaCl
32: Which
of the following salts has the minimum pH value?
(a) (NH4)2SO4
(b) NaHCO3 (c) K2SO4 (d) NaCl
33: You
are given four unknown solutions I, II, III, and IV.
The pH values of these solutions are found to be 3, 7, 8, and 10 respectively. Among
the given solutions, which solution has the highest hydrogen ion
concentration?
(a) I (b) II (c) III (d) IV
34:
Which one of the following is required to identify the gas evolved when dilute
hydrochloric acid reacts with zinc metal?
(a) blue litmus paper (b) red litmus paper
(c) a burning slinter (d) lime water
35:
Zinc reacts with an acid as well as with a base to liberate hydrogen. On the
basis of this what should be the nature of the zinc metal?
(a) basic (b) acidic (c) amphoteric (d)
neutral
36:
When you test the solutions of sodium bicarbonate, sodium hydroxide,
hydrochloric acid and acetic acid with universal indicator, in which case would
you get a red colour?
(a) sodium bicarbonate (b) hydrochloric
acid (c) sodium hydroxide (d) acetic acid
37: The
pH of a sample of pure water is 7 at room temperature. What is its pH when a
pinch of solid sodium bicarbonate is dissolved in it?
(a) vary near to 7 (b) less than 7 (c) more
than 7 (d) exactly 7
38: If
an unknown solution turns blue litmus red, then the pH of the solution is more
likely to be
(a) 12 (b) 10 (c) 7 (d) 4
Answers:
1:c 2:b 3:a 4:b 5:c 6:b 7:d 8:d 9:c 10:c
11:b 12:b 13:d 14:b 15:c 16:a 17:b 18:d 19:d 20:c 21:c 22:c 23:d 24:d 25:a 26:a
27:a 28:a 29:c 30:b 31:b 32:a 33:a 34:c 35:c 36:b 37:c 38:d
Further study
- CBSE Xth Science (Chemistry) | Acids, Bases and Salts | NCERT Solutions for In-Text Questions [Read]
- 10th CBSE Science (Chemistry) | Chapter 2, Acids, Bases and Salts | NCERT Science Textbook Exercise Solution [Read]
- Acids, Bases and Salts | Class 10, NCERT Chemistry | Science CBSE Notes and Sample Questions [Read]
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