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Chemistry 9th Class English Medium Online Test MCQs With Answers
Question # 1
Atomic number of lanthanum is
Choose an answer
57
58
59
60
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Question # 2
Dative covalent bondis also known as
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Covalent bond
Ionic Bond
Metallic Bond
Coordinate covalent bond
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Question # 3
d- subshell can accommodate maximum electrons.
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2
6
10
14
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Question # 4
Number of isotopes of hydrogen is
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2
5
4
3
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Question # 5
Which of the following is a heterogeneous mixture
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Concrete mixture
a solution of potassium nitrate in water
a solution of calcium hydroxide in water
Hot chocolate
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Question # 6
In which period and group yu will place the elemnt whic is an important part of the solar cell?
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Third period and Sixth a grop Group 16
Third priod and forth A group Group 14
Second period and forth A group Group
Third prod and fifth A group Group 15
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Question # 7
A nceklaee has 6 g of diamonds in it . What are the numberof carbon atoms in it?
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3.01 x 10
23
1.003 x 10
23
12.04 x 10
23
6.02 x 10
23
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Question # 8
The branch of science helps to understand chemcial product andprocess that reduce the use of hazadous substances.
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Green chemistry
Astrochemistry
Analytical chemistry
Physical Chemistry
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Question # 9
Whcih one of the following in as electron deficient molecule.
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NH3
O2
BF3
N2
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Question # 10
The electropositive elements have the tendency to
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Lose electrons
Gain electrons
Share electrons
All of these
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Question # 11
Mixture can be separated by means of
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Nuclear method
Phyical medhod
Chemical Method
All of these
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Question # 12
How many covalent bonds do N2 molecule have
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3
4
2
5
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Question # 13
A compound with chemicla formula Na
2
CX
3
has formula mass 106 ami. Atomicmass of the elemetn X is.
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16
23
12
106
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