ECAT Pre Engineering Chemistry Chapter 13 MCQ Test With Answer

Question # 1

Which ion will have the maximum value of heat of hydration?

Na⁺ A
Cs⁺ B
Ba⁺ C
Mg⁺² D

Question # 2

All alkali metals react with acetylene to form acetylides except:

Li A
Na B
K C
Rb D

Question # 3

Alkali metals have electrons in s-orbital:

one A
two B
three C
Four D

Question # 4

Cement plaster is made by mixing plaster of paris with

glue or oil A
gypson B
glycol C
alum or borax D

Question # 5

Which element is deposited at the cathode during the electrolysis of brine in Nelson's cell?

H₂ A
Na B
Cl₂ C
O₂ D

Question # 6

Which is insoluble carbonate?

KCO₃ A
CaCO₃ B
Na₂CO₃ C
K₂CO₃ D

Question # 7

Lime is often used as an agent

dehydrating A
hydrating B
oxidizing C
reducing D

Question # 8

Chile saltpetre has the chemical formule

NaNO₃ A
KNO₃ B
Na₂B₄O₇ C
Na₂CO₃.H₂O D

Question # 9

Group VII-A elements are called:

s-block elements A
p-block elements B
d-block elements C
f-block elements D

Question # 10

Which are being formed by alkali metals?

oxides A
nitrides B
carbides C
peroxides D

Question # 11

Chlorophyll contains in it

Li A
Na B
Mg C
Ca D

Question # 12

Maximum shielding effect is observing in

Li A
Be B
Mg C
Ca D

Question # 13

s-block elements belong to groups

I-A & II-A A
III-A to VIII-A B
I-B to X-B C
Lanthanides D

Question # 14

Down's cell is used to prepare:

Sodium carbonate A
Sodium bicarbonate B
Sodium metal C
Sodium hydroxide D

Question # 15

CO₂absorber used in breathing tanks is

K₂O₂ A
K₂O B
KO₂ C
Na₂O₂ D

Question # 16

Which is plaster of paris?

CaSO₄.H₂O A
(CaSO₄)₂.H₂O B
CaSO₄.2H₂O C
CaSO₄.3H₂O D

Question # 17

Plaster of paris is mixed with water, the expansion in volume is:

1% A
2% B
3% C
4% D

Question # 18

Diaphragm cell is used to prepare

sodium A
sodium hydroxide B
calcium C
magnesium D

Question # 19

Lime is often used as an agent:

dehydrating A
hydrating B
oxidizing C
reducing D

Question # 20

Gypsom added in cement is

1% A
2% B
3% C
4% D

Question # 21

p-block elements belong to group

I-A & II-A A
III-A to VIII-A B
I-B to X-B C
Lanthanides D

Question # 22

Which one of the following is not an alkali metal?

Francium A
Caesium B
Rubidium C
Radium D

Question # 23

Which one o the following does not belong to alkaline earth metals?

Be A
Re B
Ba C
Rn D

Question # 24

Which are being formed by alakli metals?

oxides A
nitrides B
carbides C
peroxides D

Question # 25

I-A group elements are called:

Alkali-metal A
alkaline earth metals B
Halogens C
Chalocogens D

Question # 26

Which one is alkaline earth metal?

Sodium A
Beryllium B
Potassium C
Lithium D

Question # 27

Chlorophyll contains in it:

Li A
Na B
Mg C
Ca D

Question # 28

The oxides of beryllium are

acidic A
basic B
amphoteric C
none of these D

Question # 29

d-block elements belong to groups

I-A & II-A A
III-A to VIII-A B
I-B to X-B C
Lanthanides D

Question # 30

The mineral CaSO₄.2H₂O has the general name

gypsum A
dolomite B
calcite C
epsom salt D

Sr.#	Question	Answer
1	The element caesium bears resemblance with:	A. Ca B. Cr C. Both of the above D. None of these
2	d-block elements belong to groups	A. I-A & II-A B. III-A to VIII-A C. I-B to X-B D. Lanthanides
3	the oxides of beryllium are:	A. acidic B. basic C. amphoteric D. None of these
4	Which ion will have the maximum value of heat of hydration?	A. Na⁺ B. Cs⁺ C. Ba⁺ D. Mg⁺²
5	Which of the following sulphates is not soluble in water?	A. Sodium sulphate B. Potassium sulphate C. Zinc sulphate D. Barium sulphate
6	Cement plaster is made by mixing plaster of paris with	A. glue or oil B. gypson C. glycol D. alum or borax
7	Alkali metals have electrons in s-orbital:	A. one B. two C. three D. Four
8	The mineral CaSO₄.2H₂O has the general name	A. gypsum B. dolomite C. calcite D. epsom salt
9	Arabic word "alkali" means:	A. The ashes B. the sour C. The fragrant D. Caustic
10	I-A group elements are called:	A. Alkali-metal B. alkaline earth metals C. Halogens D. Chalocogens
11	Milk of lime is	A. MgO B. CaO C. Ca(OH)₂ D. Mg(OH)₂
12	Transition elements belong to	A. I-A & II-A B. III-A to VIII-A C. I-B to X-B D. Lanthanides
13	Carbonates of alkaline earth metals decomposes to respectgive metal	A. Oxides B. Nitrates C. Sulphates D. CO₂
14	Maximum shielding effect is observing in	A. Li B. Be C. Mg D. Ca
15	Chile saltpetre has the chemical formule	A. NaNO₃ B. KNO₃ C. Na₂B₄O₇ D. Na₂CO₃.H₂O
16	Which one o the following does not belong to alkaline earth metals?	A. Be B. Re C. Ba D. Rn
17	Which element is deposited at the cathode during the electrolysis of brine in Nelson's cell?	A. H₂ B. Na C. Cl₂ D. O₂
18	Decomposition of carbonate of alkaline earth metals produce gas	A. N₂ B. Oxide C. CO₂ D. CO
19	Down's cell is used to prepare:	A. Sodium carbonate B. Sodium bicarbonate C. Sodium metal D. Sodium hydroxide
20	Lime is often used as an agent	A. dehydrating B. hydrating C. oxidizing D. reducing
21	Which one is alkaline earth metal?	A. Sodium B. Beryllium C. Potassium D. Lithium

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