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Acids Bases and Salts Chapter No5 Class9 MCQ

 

Acids Bases and Salts Chapter No. 5
Class.9 MCQ
Science and Technology
Maharashtra State Board

 

Acids Bases and Salts Chapter No 5

1

Which one of the following is acidic?

A

Lemon juice

B

Tomatoes

C

Milk

D

All

ANS

All

 

2

Which one of the following will turn red litmus blue?

A

Vinegar

B

Lemon juice

C

Baking soda solution

D

Soft drinks

ANS

Lemon juice

 

3

Which one of the following Will turn blue litmus red?

A

Vinegar

B

Lime water

C

Baking soda solution

D

Washing soda solution

ANS

Vinegar

 

4

Methyl orange is?

A

Pink in acidic medium, pink in basic medium

B

Yellow in acidic medium, pink in basic medium

C

Colourless in acidic medium, pink in basic medium

D

Pink in acidic medium, colourless in basic medium

ANS

Pink in acidic medium, pink in basic medium

 

5

Lime water is?

A

Cao

B

Ca (OH)2

C

Caco3

D

Cacl2

ANS

Ca (OH)2

 

6

The nature of calcium phosphate is present in tooth enamel is?

A

Basic

B

Amphoteric

C

Acidic

D

Neutral

ANS

Basic

 

7

Which of the following salts has no water of crystallization?

A

Blue vitrial

B

Washing soda

C

Baking soda

D

Gypsum

ANS

Baking soda

 

8

The function of quick lime in soda lime mixture is to?

A

Absorb moisture present in soda lime

B

Increase the efficiency of soda lime

C

Increase the PH of soda lime

D

decrease the pH of soda lime

ANS

Absorb moister present in soda lime

 

9

The PH of a solution of HCL is 4. This shows that the molarity of the solution is?

A

4.0 M

B

0.4 M

C

0.0001 M

D

0.001 M

ANS

0.4 M

 

10

The different of molecules of water in gypsum and pop is?

A

5/2

B

2b

C

3/2

D

½

ANS

3/2

 

11

Which of the following does not form an acidic salt?

A

Phosphoric acid

B

Carbonic acid

C

Hydrochloric acid

D

Sulphuric acid

ANS

Carbonic acid

 

12

The chemical formula of caustic potash is?

A

NaoH

B

Ca (OH)2

C

Nh4OH

D

KOH

ANS

KOH

 

13

Aqua regia is being prepared by which of the given acids?

A

Nitric acid and Hydrochloric acid

B

Citric acid and Nitric acid

C

Sulphuric acid and Hydrochloric acid

D

Sulphuric acid and citric acid

ANS

Nitric acid and Hydrochloric acid

 

14

What does the PH value denote?

A

Purity of milk

B

Analysing the nature of a solution

C

Checking the intensity of an earthquake

D

It is used for developing photographic negatives

ANS

Analysing the nature of a solution

 

15

When a PH value of a solutions shows 7, then a solution is?

A

Acidic

B

Basic

C

Neutral

D

None of these

ANS

Neutral

  

16

Which of the following PH value shown by Acids?

A

7

B

9

C

8

D

6

ANS

6

 

17

When a given solution turns red litmus blue, it indicates?

A

The solution is alkaline

B

The solution is acidic

C

The solution is neither acidic nor basic

D

None of the above

ANS

The solution is alkaline

 

18

Which of the following is present in a maximum amount in acid rain?

A

Hydrochloric acid

B

Sulphuric acid

C

Nitric acid

D

Ammonium acid

ANS

Sulphuric acid

 

19

An aqueous solution of copper sulphate solution shows an acidic character, what does it mean?

A

It undergoes photolysis

B

It undergoes dialysis

C

It undergoes electrolysis

D

It undergoes hydrolysis

ANS

It undergoes hydrolysis

 

20

Sodium chloride is a product of?

A

Strong acid and Strong base

B

Strong acid and Weak base

C

Strong base and Weak acid

D

Weak acid and Weak base

ANS

Strong acid and Strong base

  

21

Which of the following majorly present in the ocean?

A

Calcium carbonate

B

Magnesium sulphate

C

Sodium chloride

D

Potassium

ANS

Sodium chloride

 

22

What is the chemical name of baking soda?

A

Calcium carbonate

B

Potassium chloride

C

Sodium bicarbonate

D

Hydrogen chloride

ANS

Sodium bicarbonate

 

23

Which of the given acids does not contain oxegen?

A

Sulphuric Acid

B

Nitric Acid

C

Hydrochloric Acid

D

None of these

ANS

Hydrochloric Acid

 

24

What is the nature of soda water?

A

Alkaline

B

Acidic

C

Oxidising

D

Reducing

ANS

Acidic

 

25

What is Neela thotha that refers to?

A

Potassium chloride

B

Copper sulphate

C

Hydrochloric acid

D

Sodium hydroxide

ANS

Copper sulphate

  

26

What is the common name of sodium hydroxide?

A

Neela thotha

B

Kala azar

C

Caustic soda

D

None of these

ANS

Caustic soda

 

27

What are antacids?

A

Salts

B

Acids

C

Suffer

D

Bases

ANS

Acids

 

28

What is the chemical name of Epsom salt?

A

Potassium chloride

B

Sulphur dioxide

C

Magnesium sulphate

D

Sodium carbonate

ANS

Sulphur dioxide

 

29

What is the chemical name of bleaching powder?

A

Calcium oxychloride

B

Ammonium carbonate

C

Calcium carbonate

D

Calcium hydroxide

ANS

Calcium oxychloride

 

30

Which of the following were used to deveiop photographic plates?

A

Silver iodide

B

Sodium thiosulphate

C

Hydrochloric acid

D

Bromine

ANS

Sodium thiosulphate

  

 

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