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Acids , bases and salts-Class X-Vasu Classes
1.
Bleaching powder gives milky solution in water due to
a) available chlorine
b) lime present in it
c) calcium carbonate formation
d) absorption of CO2 from atmosphere
2.
The acid used in making vinegar is
a) formic acid
b) acetic acid
c) sulphuric acid
d) Nitric acid
3.
Antacids contains
a) weak base
b) strong base
c) strong acid
d) weak acid
4.
Plaster of Paris is made from
a) Gypsum
b) lime stone
c) quick lime
d) slaked lime
5.
Which of the following is not an acidic salt?
a) CuSO4
b) Na2CO3
c) ZnSO4
d) NH4NO3
6.
When an oxide of a metal reacts with water which of the following is formed
a) Acid
b) Base
c) Salt
d) None
7.
Which of the following is the weakest base
a) NaOH
b) Ca(OH)2
c) NH4OH
d) KOH
8.
Salt is acidic if it can give H+ ions
Which salt is acidic
a) Na2SO4
b) NH4Cl
c) NaCl
d) None
9.
Which of the following is not a mineral acid?
a) HNO3
b) H2SO4
c) CH3COOH
d) HCL
10.
Products of chlor alkali process are
a) NaOH , Cl2, NaCl
b) NaOH , Cl2, H2
c) Cl2, H2, Mg(OH)2
d) NaCl, CO2, H2
11.
A solution reacts with crushed egge shells to give a gas which turns lime water milky. The solution contains
a) NaCl
b) HCl
c) LiCl
d) KCl
12.
Total number of replacable OH- ions in abase
Acidity of ammonium hydroxide is
a) 1
b) 3
c) 2
d) 4
13.
Removal of water molecules from a hydrated salt is called
a) efflorescence
b) Neutralisation
c) Oxidation
d) None
14.
Farrmer adds excess manure to soil
a) to increse the pH of soil
b) to decrease the pH of soil
c) None
15.
Which is not true for a base
a) slippery
b) sour taste
c) bitter taste
d) pH is more than 7
16.
Which of the following is not hygroscopic
a) H2SO4
b) NaCl
c) Silica gel
d) Zn
17.
Which of the following is triacidic
a) Al(OH)3
b) NaOH
c) Mg(OH)2
d) Al2SO4
18.
Which acid is present in tomatoes
a) Lactic acid
b) Tartaric acid
c) Citric acid
d) Oxalic acid
19.
Which of the following is green vitriol
a) CuSO4.5H2O
b) MgSO4.7H2O
c) FeSO4.7H2O
d) Al2O3.2H2O
20.
Which acid is present in baking powder
a) Acetic acid
b) Oxalic acid
c) Tartaric acid
d) None
21.
When copper sulphate is heated
a) it chars
b) it melts
c) there is no change
d) it turns white
22.
Bleaching powder reacts with ....and releases chlorine
a) CO2 in air
b) Water vapours in air
c) Sulphur
d) Nitrogen
23.
When a solution of pH 10 is diluted its pH
a) decreases
b) increases
c) does not change
d) first decreases then increases
24.
pH of aq solution of NaCl is
a) 2
b) 7
c) 10
d) 14
25.
Which of the given indicators are the substances that give different odours in acids and bases
a) Olfactory indicators
b) Universal indicators
c) Litmus paper
d) Turmeric
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