General Knowledge

Chemistry - Section 1

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Chemistry - Section 1

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10 Questions
15 Minutes
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Question 1
The gas used in the manufacture of vanaspati from vegetable oil is

A
hydrogen
B
oxygen
C
nitrogen
D
carbon dioxide
Correct Answer: Option A

No answer description available for this question.

Question 2
The ionic radii of N3-, O2-, F- and Na+ follows the order

A
N3- > O2- > F- > Na+
B
N3- > Na+ > O2- > F-
C
Na+ > O2- > N3- > F-
D
O2- > F- > Na+ > N3-
Correct Answer: Option A

No answer description available for this question.

Question 3
The graphite rods in the nuclear reactor

A
react with U to release energy
B
produce neutrons
C
undergo combustion which triggers the nuclear fission
D
convert fast moving neutrons into thermal neutrons
Correct Answer: Option D

No answer description available for this question.

Question 4
The first metal used by man was

A
iron
B
copper
C
gold
D
bronze
Correct Answer: Option B

No answer description available for this question.

Question 5
The hydronium ion is

A
H+
B
HO -
C
H2+
D
H3O+
Correct Answer: Option D

No answer description available for this question.

Question 6
The most electropositive elements among the following is

A
Na
B
Ca
C
K
D
Cs
Correct Answer: Option D

No answer description available for this question.

Question 7
The high reactivity of fluorine is due to

A
its high electro negativity
B
small size of fluorine atom
C
availability of d-orbitals
D
strong F - F bond
Correct Answer: Option A

No answer description available for this question.

Question 8
The iron ore magnetite consists of

A
Fe2O3
B
Fe3OH4
C
FeCO3
D
3Fe2O3 .. 3H2O
Correct Answer: Option A

No answer description available for this question.

Question 9
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

A
5x/36
B
5x
C
7.2 x
D
x/6
Correct Answer: Option A

No answer description available for this question.

Question 10
The major constituent of air is

A
nitrogen
B
carbon dioxide
C
oxygen
D
hydrogen
Correct Answer: Option A

No answer description available for this question.

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