Acids, bases and salts class 10th

CLASS 10TH CHEMISTRY - ACIDS, BASES AND SALTS CHAPTER 1
MCQ

1) Which of the following types of medicine is used for treating indigestion caused by over-eating?
a) antibiotic
b) analgesic
c) antacid
d) antiseptic

Ans.  c) antacid


2) A solution reacts with marble chips to produce a gas which turns lime water milky. The solution contains:
a) Na2SO4
b) CaSO4
c) H2SO4
d) K2SO4

Ans  c) H2SO4


3) The most commonly used indicator in laboratory is
(a) Methyl Orange
(b) Litmus
 (c) Phenolphtalein
(d) Universal Indicator
Ans  d) Universal Indicator

4) one of the following is not an organic acid. That is
a) ethoanoic acid
b) formic acid
c) citric acid
d) carbonic acid

Ans (d) carbonic acid

5) Olfactory indicators are a) Clove
b) Turmeric
c) Soap
d) Rose Petals
Ans a) Clove

6) on dissolving in a water acid produce
a) hydrogen ions
b) hydroxide ions
c) sodium ions
d) chloride ions


Ans a) hydrogen ions {H+(aq) ions}

7) most of acids react with metals to form ............ gas
a) hydrogen
b) oxygen
c) carbon dioxide
d) hydrogen and oxygen

Ans a) hydrogen

8) acids react with metal carbonate to form ................... gas
a) hydrogen
b) carbon dioxide
c) Nitrogen
d) none of these

Ans b) carbon dioxide

9) An element common to all acids is
a) Chlorine
b) Nitrogen
c) Oxygen
d) Hydrogen
Ans d) Hydrogen


10) hydrogen gas burn making a .......... sound.
a) tik
b) shuun
c) pop
d) none of these

Ans c) pop


11) acids react with metal hydrogencarbonates to form .............. gas.
a) hydrogen
b) carbon dioxide
c) Nitrogen
d) none of these

Ans b) carbon dioxide

12)  The property which is common between vinegar and curd is that they:
a) have sour taste
b) have sweet taste
c) have bitter taste
d) are tasteless

Ans a) have sour taste


13) the indicator which produces a pink colour in an alkaline solution is :
a) methyl orange
b) Turmeric paper
c) Phenolphtalein
d) litmus paper

Ans c) Phenolphtalein


14) the discomfort caused by indigestion due to over eating can be cured by taking:
a) vinegar
b) lemon juice
c) baking soda
d) caustic soda

15) common name of water soluble base:
a) alkalis
b) distilled water
c) antacid
d) none of these

Ans a) alkalis


16) on dissolving in water bases produce:
a) hydrogen ions
b) hydroxide ions
c) sodium ions
d) chloride ions

Ans b) hydroxide ions

17) Neutral substances have of pH exactly:

a) 6

b) 7

c) 1 

d) 14

 Ans b) 7

18) pH value of Gastric juices( Digestive juices in stomach) :

a) 0

b) 1.4

c) 14

d) 13

Ans b)

19) pH value of toothpaste is : 

a) 8

b) 5

c) 7

d) 6

Ans a) 8

20) An ant's sting injects............... acid into a person causing a burning pain.

a) HCl

b) H2SO4

c) methanoic 

d) carbonic

Ans c) Methanoic 

21) bee sting contains:

a) an acidic liquid

b) a salt solution 

c) an alkaline 

d) an alcohol 

Ans  a) an acidic liquid

22) wasp sting contains :

a) a sugar solution 

b) an acidic liquid 

c) a salt solution 

d) an alkaline liquid 

Ans  d)  an alkaline liquid 

23) A solution turns blue litmus red. It's pH is likely to be :

a) 7

b) 5

c) 8

d) 14

Ans b) 5

24) The nature's of salt solution may be :

a) acidic 

b) basic

c) Neutral

d) all of the above.

Ans d) all of the above

25) the nature of Sodium chloride solution is 

a) acidic 

b) basic 

c) both a) and b)

d) Neutral 

Ans d) Neutral 

26) Name of common salt :

a) sodium chloride 

b) sodium sulphate 

c) sodium nitrite 

d) sodium carbonate 

Ans  a) sodium chloride 

27) chemical name of caustic soda:

a) sodium bicarbonate 

b) sodium carbonate 

c) sodium hydroxide 

d) sodium chloride 

Ans c) sodium hydroxide{ NaOH} 

28) chemical name of Washing soda

a) sodium bicarbonate 

b) sodium carbonate 

c) sodium hydroxide 

d) sodium chloride 

Ans b) sodium carbonate  {Na2CO3.10H2O} 

29) the chemical name of Baking soda is :

a) sodium hydrogencarbonate

b) sodium bicarbonate

c) sodium nitrite

d) sodium hydroxide

Ans  a) sodium hydrogencarbonate {NaHCO3} 

30) the chemical name of Bleaching powder is :

a) calcium hydroxide 

b) Calcium carbonate 

c) calcium oxychloride 

d) calcium sulphate hemihydrate 

Ans c) calcium oxychloride { CaOCl2 }

31) chemical name of Plaster of Paris is : 

a) calcium hydroxide 

b) Calcium carbonate 

c) calcium oxychloride 

d) calcium sulphate hemihydrate

Ans d) calcium sulphate hemihydrate { CaSO4.1/2H2O }