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1.

The saponification of an alkanoate to produce soap and alkanol involves

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A.

dehydration

B.

esterification

C.

hydrolysis

D.

oxidation


2.
The presence, of an impurity in substance Will cause the melting point to
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A.
be zero.
B.
reduce.
C.
increase.
D.
be stable.

3.

What volume of carbon(ll) oxide is produced by reacting excess carbon With 10dm3 of oxygen?

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A.

5dm3

B.

20dm3

C.

15dm3

D.

10dm3


4. q-image

From the diagram above, an ideal gas is represented by

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A.

Z

B.

W

C.

X

D.

Y


5.
The rate of diffusion of a gas Y is twice that of Z. if the relative molecular mass of Y is 64 and the two gases diffuse under the same conditions, find the relative molecular mass of Z.
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A.
32
B.
4
C.
8
D.
16

6.
The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is
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A.
carbon-14.
B.
phosphorus-32.
C.
cobalt-60.
D.
iodine-131.

7.
How many unpaired electrons are in the p-orbitals of a fluorine atom?
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A.
3
B.
0
C.
1
D.
2

8.

The radioactive emission with the least ionization power is 

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A.

α-particles

B.

X-rays.

C.

γ-rays.

D.

β-particles.


9.
The shape of the carbon(lV) oxide molecule is
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A.
pyramidal.
B.
linear.
C.
angular.
D.
tetrahedral.

10.

Which of the following molecules is held to ether by hydrogen bond?

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A.

CH4

B.

HBr

C.

H2SO4

D.

HF


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