Question

1. Antoine Lavoisier discovered the role of during combustion.

(a) nitrogen (b) oxygen (c) carbon (d) boron

2. is the property of a substance that can be drawn into wires.

(a) Malleability (b) Lustre (c) Ductility (d) Brittle

3. Chemists are scientists engaged in research or experiments.

(a) physical (b) geological (c) archaeological (d) chemical

4. The layer of our Earth’s atmosphere protects us from harmful UV rays of the sun.

(a) argon (b) hydrogen (c) ozone (d) helium

5. Majority of known elements are .

(a) non-metals (b) noble gases (c) metalloids (d) metals

6. Benzoic acid is used as a .

(a) herbicide (b) fabric (c) preservative (d) electronic

7. The symbol Al is denoted for the element .

(a) argon (b) aluminium (c) argentum (d) aurum

8. Hydrogen and oxygen combine chemically to form .

(a) sand (b) salt (c) water (d) ammonia

9. The famous gold foil experiment was performed by .

(a) Ernest Rutherford (b) John Dalton

(c) Dmitri Mendeleev (d) Niels Bohr​

Answer 1

Answer:

1. oxygen

2. ductility

3. chemical

4. ozone

5. metals

6. fabric (I guess)

7. aluminum

8. water

9. Ernest Rutherford

HOPE IT HELPS YOU

Happy to help!!

Answer 2

Answer:

1. Antoine Lavoisier discovered the role of oxygen during combustion.

2. Ductility is the property of a substance that can be drawn into wires.

3. Chemists are scientists engaged in research of chemical experiments.

4. The ozone layer of our Earth’s atmosphere protects us from harmful UV rays of the sun.

5. Majority of known elements are metals.

6. Benzoic acid is used as a preservative.

7. The symbol Al is denoted for the element aluminium.

8. Hydrogen and oxygen combine chemically to form water.

9. The famous gold foil experiment was performed by Ernest Rutherford.

Hope it helps you!!(●'◡'●)