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Chemistry 9th Class English Medium Online Test MCQs With Answers
Question # 1
A sub sheel that cna accommodate 6 electrons is
Choose an answer
b
s
f
p
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Question # 2
How many periods are present in the modern periodic table
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7
8
10
12
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Question # 3
How many elements are present in 7th period.
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2
8
18
23
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Question # 4
When system is at quilibrium state.
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The rate of the forward and reverse rections become equal
The concentrationof reatants and product becoes equal
The oposing reactions stop
The rate of the reverse reactio becomes very low
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Question # 5
When new bonds ae formed, the energy is
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Consume
Remain same
Release
None of these
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Question # 6
Period nuebr tells abou the
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No. of valance electrons
No. of electronic shells
Both a and b
None of the above
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Question # 7
If the Delta H value is negative then reaction witll be
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Endotermic
Exothermic
May or may not be exothermic or endothermic
None of these
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Question # 8
Hazardous effects of shopping bags are studied in
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Geochemistry
Inorganic chemistry
Environmental chemistry
analytical chemistry
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Question # 9
Milk of magnesia contains Mg(OH)2 It is used as antacid It neutralizes excess stomachaacid. Which salt is formed in this reaction.
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MgCl2
MgSO4
MgCO3
MgO
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Question # 10
Which Isotopes is commonly used to irradiate cancer cells.
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Cobalt -60
Iodine-23
Carbon -14
Iodine-131
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Question # 11
Acidic Acid is used for
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Cleaning metal
Etching designs
Flavouring food
Making explosives
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Question # 12
1 gram formula of NaCl contan is grams.
Choose an answer
100 g
58.5 g
32 g
49 g
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Question # 13
Atomic number is represented by
Choose an answer
P
A
At
Z
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