Chemistry | Study Mode

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Question 1
A

dehydration

B

esterification

C

hydrolysis

D

oxidation

Explanation

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Correct option: C
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Question 2
A
be zero.
B
reduce.
C
increase.
D
be stable.
Explanation

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Correct option: B
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Question 3
A

5dm3

B

20dm3

C

15dm3

D

10dm3

Explanation

2C + O ⇒ 2CO

2 : 1 : 2

2 volume of carbon react with 1 volume of oxygen to produce 2 volume of carbon ii oxide.

1dm3 of O2 = 2 dm3 of CO

10 dm3 of O2 = X dm3 of CO

by cross multiplication :

X = 2*10 = 20 dm3 of CO


Correct option: B
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Question 4
Chemistry Q 4 image
A

Z

B

W

C

X

D

Y

Explanation

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Correct option: A
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Question 5
A

32

B

4

C

8

D

16

Explanation

\(\sqrt{y}\) = 2x
\(\sqrt{Z}\) = x
\(\frac{rz}{ry}\) = \(\sqrt{\frac{my}{mz}}\)

\(\frac{2x}{x}\) = \(\sqrt{\frac{64}{mz}}\)
\(\frac{4}{1}\) = \(\frac{64}{mz}\)

mz = \(\frac{64}{4}\)
mz = 16


Correct option: D
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Question 6
A
carbon-14.
B
phosphorus-32.
C
cobalt-60.
D
iodine-131.
Explanation

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Correct option: C
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Question 7
A
3
B
0
C
1
D
2
Explanation

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Correct option: C
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Question 8
A

α-particles

B

X-rays.

C

γ-rays.

D

β-particles.

Explanation

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Correct option: C
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Question 9
A
pyramidal.
B
linear.
C
angular.
D
tetrahedral.
Explanation

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Correct option: B
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Question 10
A

CH4

B

HBr

C

H2SO4

D

HF

Explanation

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Correct option: D

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