ECAT Pre Engineering Chemistry Chapter 15 MCQ Test With Answer

Question # 1

Which phosphorus is the most poisonous?

White A
Red B
Black C
All D

Question # 2

Laughing gas is chemically

NO A
N_2O B
NO₂ C
N₂O₄ D

Question # 3

Which is nitrous acid?

HNO₃ A
HNO B
HNO₂ C
H₂NO₃ D

Question # 4

Which is an inert gas?

Nitrogen A
Oxygen B
Hydrogen C
CO D

Question # 5

NO₂forms acidic solution:

Red A
Blue B
Green C
Brown D

Question # 6

Tungsten and Uranium are turned to an reaction with HNO₃:

Oxides A
chlorides B
Nitrides C
Nitrates D

Question # 7

What are non-metals?

Sb & Bi A
P & Bi B
N & P C
As & N D

Question # 8

Nitrogen is present in atmosphere by weight

75% A
76% B
77% C
78% D

Question # 9

The most stable phosphorus allotrope is

White A
Red B
Black C
All D

Question # 10

Formation of NO from N₂ and O₂ requires temp

30⁰C A
300⁰C B
3000⁰C C
30000⁰C D

Question # 11

Allotropic forms of sulpher are

Two A
Three B
Four C
Five D

Question # 12

Which has garlic like odour?

N₂O A
NO B
NO₂ C
NH₄ D

Question # 13

Calcium carbonates contains oxygen in it:

48% A
50% B
53% C
60% D

Question # 14

Which element of group IV-A does not use d — orbital?

N A
P B
As C
Sb D

Question # 15

SO₃ is not absorbed in water directly to or H₂SO₄ because

the reaction does not go to completion. A
the reaction is quite slow. B
the reaction is exothermic. C
SO₃ is insoluble in water. D

Question # 16

The brown gas formed when metal reduces HNO₃is

N₂O₅ A
N₂O₃ B
NO₂ C
NO D

Question # 17

Allotropic forms of phosphorus are

three A
four B
five C
six D

Question # 18

Colour of N₂O₄ is

Raddish brown A
Yellow B
Colouries C
green D

Question # 19

Sulphuric acid is used

As fertilizers A
As dehydrating agent B
As oxidizing agent C
All above D

Question # 20

Which can be prepared from HNO₃?

T.N.T A
Fertilizers B
Picric acid C
All of these D

Question # 21

SO₂is not absorbed in water directly to or H₂SO₄because:

The reaction does not go to completion A
the reaction is quite slow B
the reaction is exothemic C
SO₃is insolublein water D

Question # 22

Aqua Regia has ratio of conc. HCl and HNO₃

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

Question # 23

Tungsten and uranium are turned to an reaction with HNO₃

Oxides A
Chlorides B
Nitrides C
Nitrates D

Question # 24

Which has sweetish taste?

N₂O A
NH₃ B
Cl₂ C
CO₂ D

Question # 25

Which element of group IV-A does not use d-orbital?

N A
P B
As C
Sb D

Question # 26

Out of all the elements of group VI-A the highest melting and boiling points is shown by the elements:

Te A
Se B
S C
Pb D

Question # 27

Among group V-A elements, the most electronegative element is:

Sb A
N B
P C
As D

Question # 28

Nitrogen is present in atmosphere by weight:

75% A
76% B
77% C
78% D

Question # 29

Which is laughing gas?

NO A
N₂O B
NO₂ C
NO₃ D

Question # 30

Which gas is heavier than air?

CO₂ A
NH₃ B
Cl₂ C
CO₂ D

Sr.#	Question	Answer
1	Among group V-A elements, the most electronegative element is:	A. Sb B. N C. P D. As
2	Which gas is heavier than air?	A. CO₂ B. NH₃ C. Cl₂ D. CO₂
3	Which is nitrous acid?	A. HNO₃ B. HNO C. HNO₂ D. H₂NO₃
4	Colour of N₂O₄ is	A. Raddish brown B. Yellow C. Colouries D. green
5	Formation of NO from N₂ and O₂ requires temp	A. 30⁰C B. 300⁰C C. 3000⁰C D. 30000⁰C
6	Tungsten and uranium are turned to an reaction with HNO₃	A. Oxides B. Chlorides C. Nitrides D. Nitrates
7	The brown gas formed when metal reduces HNO₃is	A. N₂O₅ B. N₂O₃ C. NO₂ D. NO
8	Out of all the elements of group V-A , the highest ionization energy is possessed by:	A. N B. P C. Sb D. Bi
9	Aqua Regia has ration of conc. HCl and HNO₃.	A. 1 : 2 B. 1 : 3 C. 1 : 4 D. 2 : 3
10	Calcium carbonates contains oxygen in it:	A. 48% B. 50% C. 53% D. 60%

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ECAT Pre Engineering Chemistry Chapter 15 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 15 Group IV-A and VI-A Elements

ECAT Chemistry Chapter 15 Group IV-A and VI-A Elements

Which phosphorus is the most poisonous?

Laughing gas is chemically

Which is nitrous acid?

Which is an inert gas?

NO2forms acidic solution:

Tungsten and Uranium are turned to an reaction with HNO3:

What are non-metals?

Nitrogen is present in atmosphere by weight

The most stable phosphorus allotrope is

Formation of NO from N2 and O2 requires temp

Allotropic forms of sulpher are

Which has garlic like odour?

Calcium carbonates contains oxygen in it:

Which element of group IV-A does not use d — orbital?

SO3 is not absorbed in water directly to or H2SO4 because

The brown gas formed when metal reduces HNO3is

Allotropic forms of phosphorus are

Colour of N2O4 is

Sulphuric acid is used

Which can be prepared from HNO3?

SO2is not absorbed in water directly to or H2SO4because:

Aqua Regia has ratio of conc. HCl and HNO3

Tungsten and uranium are turned to an reaction with HNO3

Which has sweetish taste?

Which element of group IV-A does not use d-orbital?

Out of all the elements of group VI-A the highest melting and boiling points is shown by the elements:

Among group V-A elements, the most electronegative element is:

Nitrogen is present in atmosphere by weight:

Which is laughing gas?

Which gas is heavier than air?

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