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Chemistry Class 10 Chapter 10 - Acids, Bases and Salts - 6
1.
Which one of the following is a salt of Phosphoric acid?
a) NaH
2
PO
4
b) Na
3
PO
4
c) all of these
d) Na
2
HPO
4
2.
When the H
+
ions increases and OH
-
ions decreases, the solution becomes?
a) basic
b) neutral
c) acidic
d) alkaline
3.
The salt which is formed by partial neutralization of an acid is known as?
a) normal salt
b) basic salt
c) acid salt
d) soda ash
4.
Methyl red changes colour from red to yellow at pH?
a) 7
b) 3
c) 9
d) 6
5.
The pH of soapy solution is?
a) 12
b) 13
c) 0
d) 4
6.
The pH of tomato juice is?
a) 5
b) 6
c) 7
d) 4
7.
Sulphites and Benzoates are?
a) bases
b) alkalies
c) acids
d) salts
8.
Which one of the following is used as antioxidant?
a) Mg(OH)
2
b) HNO
2
c) H
2
SO
2
d) HCL
9.
The colour of bromothymol blue in basic solution is?
a) pink
b) yellow
c) red
d) blue
10.
When fossil fuels are burned, they release?
a) oxides of nitrogen
b) sulphur dioxide
c) none of these
d) both of these
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