NON-MEATALS, D. Acid, Base and Salt

Total Questions: 56

21. Sodawater obtained by passing carbon dioxide in water is : [R.A.S./R.T.S. (Pre) 1999]

(a) An oxidising agent
(a) An oxidising agent
(c) Acidic in nature
(d) A reducing agent

Correct Answer: (c) Acidic in nature

Solution:The carbon dioxide (CO₂) gas dissolved in water can cause water to become acidic. When carbon dioxide is dissolved in the water, it forms carbonic acid (H₂CO₃) by reacting with water (H₂O) and remains in dissolved state at high pressure. So, the sodawater becomes acidic in nature. The acidity of water from dissolved CO₂ can be reduced by a base such as baking soda (Sodium bicarbonate).

22. Which of the following acid do not contain oxygen – [R.A.S./R.T.S. (Pre) 1992]

(a) Nitric Acid
(b) Sulphuric Acid
(c) Hydrochloric Acid
(d) All of above

Correct Answer: (c) Hydrochloric Acid

Solution:Hydrochloric Acid (HCl) does not contain oxygen, as it is a compound of hydrogen and chlorine.

23. An unknown gas quickly dissolves in water. This gaseous aqueous solution turns red litmus into the blue. This gas produces white flame with hydrogen chloride. This unknown gas is – [R.A.S./R.T.S. (Pre) 1994]

(a) Sulphur dioxide
(b) Nitric Hydroxide
(c) Ammonia
(d) Carbon monoxide

Correct Answer: (c) Ammonia

Solution:The aqueous solution of ammonia is basic due to forming of ammonium hydroxide which changes the colour of red litmus into blue. Ammonia produces a white flame when it reacts with hydrochloric acid.

24. Match List-I with List-II and select the correct answer from the code given below the lists. [U.P. RO/A.R.O. (Mains) 2016]

List-I	List-II
A. Bleaching powder	1. Sodium bicarbonate
B. Baking soda	2. Sodium carbonate
C. Washing powder	3. Calcium oxychloride
D. Plaster of Paris	4. Calcium sulphate hemihydrate

Code	A	B	C	D
(a)	3	1	4	2
(b)	2	3	1	4
(c)	3	1	2	4
(d)	4	3	2	1

Correct Answer: (c)

Solution:

The correctly matched lists are as follows:

List-I	List-II
Bleaching powder	Calcium hypochlorite/oxychloride (CaOCl₂)
Baking soda	Sodium bicarbonate (NaHCO₃)
Washing powder	Sodium carbonate (Na₂CO₃)
Plaster of Paris	Calcium sulphate hemihydrate (CaSO₄.½H₂O)

25. Which one of the following pairs is not correctly matched? [U.P. RO/A.R.O. (Mains) 2021]

(a) Bleaching powder – Calcium oxychloride
(b) Plaster of Paris – Calcium bicarbonate
(c) Washing powder – Sodium carbonate
(d) Baking Soda – Sodium bicarbonate

Correct Answer: (b) Plaster of Paris – Calcium bicarbonate

Solution:The correctly matched lists are as follows:

List-I	List-II
Bleaching powder	Calcium hypochlorite/oxychloride (CaOCl₂)
Baking soda	Sodium bicarbonate (NaHCO₃)
Washing powder	Sodium carbonate (Na₂CO₃)
Plaster of Paris	Calcium sulphate hemihydrate (CaSO₄.½H₂O)

26. What is Neela thotha? [M.P.P.C.S. (Pre) 1990]

(a) Copper Sulphate
(b) Calcium Sulphate
(c) Iron Sulphate
(d) Sodium Sulphate

Correct Answer: (a) Copper Sulphate

Solution:Neela thotha (blue vitriol) is a compound of copper and sulphate. Its chemical formula is CuSO₄.5H₂O.

27. The chemical used for destroying fungi in water tanks is : [66th B.P.S.C. (Pre) (Re. Exam) 2020]

Correct Answer: (d) Copper Sulphate

Solution:Copper sulphate (blue vitriol or neela thotha) is used for destroying fungi in water tanks. It is also used as a fungicide to protect field crops.

28. Blue vitriol is chemically : [63rd B.P.S.C. (Pre) 2017]

Correct Answer: (c) Copper sulphate

Solution:Copper sulphate (blue vitriol or neela thotha) is used for destroying fungi in water tanks. It is also used as a fungicide to protect field crops.

29. Match the following lists by using codes given below. Select the correct answer? [63rd B.P.S.C. (Pre) 2017]

List-I	List-II
A. Washing soda	1. Sodium Hydroxide
B. Caustic soda	2. Copper Sulphate
C. Neela thotha	3. Sodium Thiosulphate
D. Hypo	4. Sodium Carbonate

Code :

Code	A	B	C	D
(a)	1	3	4	2
(b)	4	1	2	3
(c)	2	3	1	4
(d)	3	2	1	4

Correct Answer: (b)

Solution:


A. Baking soda	1. Sodium carbonate
B. Caustic soda	2. Sodium Hydroxide
C. Hypo	3. Magnesium Thiosulphate
D. Neela thotha	4. Copper Sulphate

30. Match the following lists by using codes given below. Select the correct answer? [I.A.S. (Pre) 1998]

List-I	List-II
A. Neela thotha	1. Sodium bicarbonate
B. Epsom salt	2. Sodium Hydroxide
C. Baking soda	3. Magnesium Sulphate
D. Caustic soda	4. Copper Sulphate

Code	A	B	C	D
(a)	3	4	2	1
(b)	4	3	2	1
(c)	3	4	1	2
(d)	4	3	1	2

Correct Answer: (d)

Solution:

Neela thotha - Copper Sulphate
Epsom salt - Magnesium Sulphate
Baking soda - Sodium Bicarbonate
Caustic soda - Sodium Hydroxide

« Previous 1 234 5 6 Next »

NON-MEATALS, D. Acid, Base and Salt

21. Sodawater obtained by passing carbon dioxide in water is : [R.A.S./R.T.S. (Pre) 1999]

22. Which of the following acid do not contain oxygen – [R.A.S./R.T.S. (Pre) 1992]

23. An unknown gas quickly dissolves in water. This gaseous aqueous solution turns red litmus into the blue. This gas produces white flame with hydrogen chloride. This unknown gas is – [R.A.S./R.T.S. (Pre) 1994]

24. Match List-I with List-II and select the correct answer from the code given below the lists. [U.P. RO/A.R.O. (Mains) 2016]

25. Which one of the following pairs is not correctly matched? [U.P. RO/A.R.O. (Mains) 2021]

26. What is Neela thotha? [M.P.P.C.S. (Pre) 1990]

27. The chemical used for destroying fungi in water tanks is : [66th B.P.S.C. (Pre) (Re. Exam) 2020]

28. Blue vitriol is chemically : [63rd B.P.S.C. (Pre) 2017]

29. Match the following lists by using codes given below. Select the correct answer? [63rd B.P.S.C. (Pre) 2017]

30. Match the following lists by using codes given below. Select the correct answer? [I.A.S. (Pre) 1998]

Related Posts