ECAT Pre Engineering Chemistry Chapter 13 MCQ Test With Answer

Question # 1

acidic soils are neutralized by adding

plaster of paris A
brine B
lime C
milk of magnesia D

Question # 2

Which alkaline earth metal makes peroxide?

Be A
Mg B
Ca C
Ba D

Question # 3

Which oxide is insouluble

Li₂O A
Na₂O B
K₂O C
BaO D

Question # 4

Group VII-A elements are called:

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

Question # 5

The oxides of beryllium are

acidic A
basic B
amphoteric C
none of these D

Question # 6

Lime is often used as an agent

dehydrating A
hydrating B
oxidizing C
reducing D

Question # 7

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 # 8

Chlorophyll contains in it

Li A
Na B
Mg C
Ca D

Question # 9

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

Be A
Ra B
Ba C
Rn D

Question # 10

Cement plaster is made by mixing plaster of paris with:

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

Question # 11

Down's cell is used to prepare:

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

Question # 12

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 # 13

Which is plaster of paris?

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

Question # 14

Gypsom added in cement is

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

Question # 15

Alkali metals have electrons in s-orbital:

one A
two B
three C
Four D

Question # 16

The mineral CaSO₄.2H₂O has the general name

gypsum A
dolomite B
calcite C
epsom salt D

Question # 17

Carbonates of alkaline earth metals decomposes to respectgive metal

Oxides A
Nitrates B
Sulphates C
CO₂ D

Question # 18

CO₂absorber used in breathing tanks is

K₂O₂ A
K₂O B
KO₂ C
Na₂O₂ D

Question # 19

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

Na⁺ A
Cs⁺ B
Ba⁺ C
Mg⁺² D

Question # 20

Which one is alkaline earth metal?

Sodium A
Beryllium B
Potassium C
Lithium D

Question # 21

Chile saltpetre has the chemical formule

NaNO₃ A
KNO₃ B
Na₂B₄O₇ C
Na₂CO₃.H₂O D

Question # 22

Decomposition of carbonate of alkaline earth metals produce gas

N₂ A
Oxide B
CO₂ C
CO D

Question # 23

All alkali metals react with acetylene to form acetylides except

Li A
Na B
K C
Rb D

Question # 24

Which are being formed by alkali metals?

oxides A
nitrides B
carbides C
peroxides D

Question # 25

alkaline metal have electrons in s-orbitals:

One A
Two B
three C
Four D

Question # 26

Arabic word "alkali" means:

The ashes A
the sour B
The fragrant C
Caustic D

Question # 27

Lime is often used as an agent:

dehydrating A
hydrating B
oxidizing C
reducing D

Question # 28

The strong alkaline solution in water is of metal:

Potassium A
Sodium B
Lithium C
Magnesium D

Question # 29

Which one is alkali metal in them?

Rubidium A
Magnesium B
Calcium C
Barium D

Question # 30

Which one of the following is not an alkali metal?

Francium A
Caesium B
Rubidium C
Radium D

Sr.#	Question	Answer
1	II-A group element are called:	A. s-block elements B. p-block elements C. d-block elements D. f-block elements
2	Chlorophyll contains in it	A. Li B. Na C. Mg D. Ca
3	Which ion will have the maximum value of heat of hydration?	A. Na⁺ B. Cs⁺ C. Ba⁺ D. Mg⁺²
4	Which element is deposited at the cathode during the electrolysis of brine in Nelson's cell?	A. H₂ B. Na C. Cl₂ D. O₂
5	I-A group elements are called:	A. Alkali-metal B. alkaline earth metals C. Halogens D. Chalocogens
6	Lime is often used as an agent:	A. dehydrating B. hydrating C. oxidizing D. reducing
7	The oxides of beryllium are	A. acidic B. basic C. amphoteric D. none of these
8	Which one is alkali metal in them?	A. Rubidium B. Magnesium C. Calcium D. Barium
9	Cement plaster is made by mixing plaster of paris with:	A. glue or oil B. gypsom C. glycol D. alum or borax
10	Acidic soils are neutralized by adding:	A. Plaster of paris B. Brine C. Lime D. Milk of magnesia

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