ECAT Pre Engineering Chemistry Chapter 13 MCQ Test With Answer

Question # 1

Chile saltpetre has the chemical formule

NaNO₃ A
KNO₃ B
Na₂B₄O₇ C
Na₂CO₃.H₂O D

Question # 2

Chlorophyll contains in it:

Li A
Na B
Mg C
Ca D

Question # 3

Group VII-A elements are called:

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

Question # 4

I-A group elements are called:

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

Question # 5

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

Be A
Ra B
Ba C
Rn D

Question # 6

All alkali metals react with acetylene to form acetylides except:

Li A
Na B
K C
Rb D

Question # 7

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

Na⁺ A
Cs⁺ B
Ba⁺ C
Mg⁺² D

Question # 8

Which alkaline earth metal makes peroxide?

Be A
Mg B
Ca C
Ba D

Question # 9

Arabic word "alkali" means:

The ashes A
the sour B
The fragrant C
Caustic D

Question # 10

Decomposition of carbonate of alkaline earth metals produce gas

N₂ A
Oxide B
CO₂ C
CO D

Question # 11

Cement plaster is made by mixing plaster of paris with:

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

Question # 12

Which is plaster of paris?

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

Question # 13

The mineral CaSO₄.2H₂O has the general name

gypsum A
dolomite B
calcite C
epsom salt D

Question # 14

Carbonates of alkaline earth metals decomposes to respectgive metal

Oxides A
Nitrates B
Sulphates C
CO₂ D

Question # 15

the oxides of beryllium are:

acidic A
basic B
amphoteric C
None of these D

Question # 16

The element caesium bears resemblance with:

Ca A
Cr B
Both of the above C
None of these D

Question # 17

Which one is alkaline earth metal?

Sodium A
Beryllium B
Potassium C
Lithium D

Question # 18

Down's cell is used to prepare:

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

Question # 19

Cement plaster is made by mixing plaster of paris with

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

Question # 20

Acidic soils are neutralized by adding:

Plaster of paris A
Brine B
Lime C
Milk of magnesia D

Question # 21

Which are being formed by alkali metals?

oxides A
nitrides B
carbides C
peroxides D

Question # 22

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

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

Question # 23

CO₂absorber used in breathing tanks is

K₂O₂ A
K₂O B
KO₂ C
Na₂O₂ D

Question # 24

Maximum shielding effect is observing in

Li A
Be B
Mg C
Ca D

Question # 25

Gypsom added in cement is

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

Question # 26

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 # 27

Carbonates of alkaline earth metals decomposes to respective metal

oxides A
nitrates B
sulphates C
CO₂ D

Question # 28

Alkali metals have electrons in s-orbital:

one A
two B
three C
Four D

Question # 29

Lime is often used as an agent

dehydrating A
hydrating B
oxidizing C
reducing D

Question # 30

The oxides of beryllium are

acidic A
basic B
amphoteric C
none of these 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	Milk of lime is	A. MgO B. CaO C. Ca(OH)₂ D. Mg(OH)₂
4	Decomposition of carbonate of alkaline earth metals produce gas	A. N₂ B. Oxide C. CO₂ D. CO
5	All alkali metals react with acetylene to form acetylides except	A. Li B. Na C. K D. Rb
6	Gypsom added in cement is	A. 1% B. 2% C. 3% D. 4%
7	Arabic word "alkali" means:	A. The ashes B. the sour C. The fragrant D. Caustic
8	Cement plaster is made by mixing plaster of paris with	A. glue or oil B. gypson C. glycol D. alum or borax
9	Down's cell is used to prepare:	A. Sodium carbonate B. Sodium bicarbonate C. Sodium metal D. Sodium hydroxide
10	Alkali metals have electrons in s-orbital:	A. one B. two C. three D. Four

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