Definitions and MCQs of Ninth class chemistry (acids, bases and salts)

Complete and comprehensive notes of ninth class chemistry.

1. Chapter 9
Acids, Bases and Salts
“I do not own any business but the entire
world is my own where Almighty Allah is to
be felt and Muhammad(s.a.w) to be
followed”
1.Ascorbic acid is the other name of:
a) Vitamin A b) Vitamin B
c) Vitamin C d) Vitamin D
2.all are the properties of acids except:
a) sour in tasteb) smooth in touch
c) proton donor d) electrons acceptor
3.the common acid in stomach is:
a) HCl b) H2SO4
c) HNO3 d) H3PO4
4.The consumption of …… is an index to the state
of civilization and prosperity of a country:
a) HCl b) H2SO4
c) HNO3 d) H3PO4
5.the important acid for making explosive
materials and fertilizers is:
a) HCl b) H2SO4
c) HNO3 d) H3PO4

2. 6.the souring of milk produces.
a) citric acid b) lactic acid
c) acetic acid d) fumaric acid
7.lemon, oranges, grape fruits contain:
a) citric acidb) lactic acid
c) acetic acid d) fumaric acid
8.all are the properties of bases except:
a) bitter in taste
b) aqueous solution conducts electricity
c) undergo neutralization with acids
d) turn litmus paper to red.
Q 9 – 14
Select from the terms below:
a) Arrhenius Theory b) Bronsted –lowery
c) Lewis conceptd) N.O.T
9.Bases are proton acceptors.
10.acids are sour in taste
11.acids are H
+
ions donor
12.bases turn litmus paper to blue
13.ammonia is base
14.bases are electron donors
15.all are weak acids except:
a) sulphuric acidb ) acetic acid
c) formic acid d) phosphoric acid
16.which one is the normal salt:
a) NaCl b) NaHSO4

3. c) KHCO3 d) Mg(OH) Cl
17.which one is not double salt:
a) potash alum b) chrome alum
c) Mohor’s salt d) table salt
Q18 -22
Select from the terms below:
a) Sodium carbonateb) backing soda
c) copper sulphated) Epsom salt
e) potash alumf) N.O.T
18.it is a common double salt
19.used as antiacid and fire extinguishers
20.used as germicide, insecticide and in paint and
varnish industry
21.it is used in softening of water, glass industry
and as cleaning agent
22.used as anticeptic and mouth wash
23.water is not:
a) universal solventb) liquid
c) present in urined) amphoteric molecule
e) N.O.T
Q 24 – 29
Select from the terms below
a) 0 b) 5-7
c) 7 d) 7.4
e) 14
24.it is the neutral pH
25.the pH of water is :

4. 26.it is the highly acidic Ph
27.the pH of urine is:
28.the pH of blood is
29.pH + p OH = ?
30.The number of moles of solute dissolved per
liter of solution is:
a) molarity b) molality
c) titration d) pH
31.negative logarithm of hydrogen ion
concentration is:
a) molarity b) molality
c) titration d) pH
32.it is important for an analytical chemist
a) molarity b) molality
c) titration d) pH
33.a solution whose molarity or strength is known
is called standard solution:
a) true b) false
34.Methyl orange produce…. Color in acidic
solution
a) red b) green
c) yellow d) pink
35.low p H of blood causes diabetes, diarrhea,
vomiting.
a) true b) false

5. 36.water and CO2 are produced as a result of
neutralization:
a) true b) false
ANS KEY
1 C 2 B 3 A
4 B 5 C 6 B
7 A 8 D 9 B
10 D 11 A 12 D
13 B 14 C 15 A
16 A 17 D 18 E
19 B 20 C 21 A
22 E 23 E 24 C
25 C 26 A 27 B
28 D 29 E 30 A
31 D 32 C 33 A
34 A 35 B 36 B