Inorganic Chemistry Elements of Biological Importance MCQs Quiz Test 20

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In most subject of chemical university have their own notes for the test preparations. All of chemistry topics have some same questions with their topics. In all chemicals subjects have need to prepare their basics also. For your Good Grade in exams you have need prepared Basic all of the definations of that subjects. In chemistry world all online chemistry tutor are also focus on basics.

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

Sb
As
P
N (Answer)

2. Oxygen is present in atmosphere about:

Not exactly so,
¾
¼ (Answer)
½

3. Silica contains oxygen by weight:

48%
50%
53% (Answer)
89%

4. What are non-metals?

N & P (Answer)
P & Bi
Sb & Bi
As & N

5. Nitrogen is present in atmosphere.

78% (Answer)
89%
36%
21%

6. Which property is not present in non-metals?

Predominantly covalent
High electropositivity (Answer)
Poor conductor
High E.N. value

7. Calcium carbonate contains oxygen.

53%
50%
48% (Answer)
89%

8. The brown gas formed when metal reduces HNO₃ is:

N2O5
N2O3
N2O4
NO2 (Answer)

9. Which is an inert gas?

Nitrogen (Answer)
Hydrogen
CO
Oxygen

10. Oxidation of NO in air produces:

N2O3
N2O
N2O5
N2O4 (Answer)

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

P
N (Answer)
Sb
As

12. Water contains oxygen about:

89% (Answer)
48%
53%
50%

13. Laughing gas is chemically:

NO
N2O4
NO2
N2O (Answer)

14. Which property of oxygen resembles with sulphur?

Typical non-metals (Answer)
O- has no but S- has isotopes
Ionic bond formation
No poly atomic molecules

15. Out of all the elements of group V-A, the highest ionization energy is possessed by:

P
Bi
N (Answer)
Sb