Question

2nd unit test

Sub- chemistry Total mark- 20

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20. The radical which containing one nitrogen atom and 4 hydrogen atom

1 point

Ammonia

Ammonium

Clear selection

16. Burning of fuels ia an example of .......... change

1 point

Man- made

Natural

2. Phosphorus is a non metallic element

1 point

True

False

1. Atomicity of Ar is ............

1 point

Zero

One

5. A molecule of a compound containing two oxygen atoms and one nitrogen atoms is

1 point

N2O

NO2

4. Nitrate is a

1 point

Cation

Anion

19. The positively charged ions are called

1 point

Cations

Anions

14. Making of curd from milk is a ............. chnage

1 point

Temporary

Permanent

7. Proton is discovered by

1 point

Goldstein

Rutherford

Name *

Your answer

9. In ............ change new substance are formed

1 point

Physical

Chemical

10. Rusting of iron is an example of ......... change

1 point

Physical

Chemical

11. Ammonium Chloride a sublimable solid undergoes ....... on heating

1 point

Synthesis

Dissociation

6. The basic unit of matter not capable of independent existence is

1 point

Atom

Molecule

15. Interparticle space is maximum in

1 point

Gases

Solids

8. Thunder and lightening is an example of ............ change

1 point

Periodic

Non periodic

Sec *

A

B

17. In ......... particle have a definite shape

1 point

Solid

Liquid

12. In .......... the particles of an atom are closely packed

1 point

Solid

Gases

3. Valency of mg is ...........

1 point

2+

2-

18. An element with variable valency

1 point

Copper

Sodium

13. The fixed temperature at which a liquid changes into vapour

1 point

Boiling point

Melting point

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Answer 1

Answer:

20 . ammonium

16.man made

2.true

1.zero

5.NO2

4 . anion

19. cation

14. permanent

7. Rutherford

9. chemical

10. chemical

6. atom

15. gases

8. non periodic

17. solid

12. solid

3. 2

18. copper

13. boiling point

hope it will help you dear...

Answer 2

Answer:

hii

Explanation:

apne follow nhi Kiya kyu