Chlorine

Q. What is the average atomic mass of chlorine?

1. 35
2. 35.5
3. 40
4. 35.2

Q. The physical state of chlorine at room temperature is :

1. Solid
2. Liquid
3. Gas
4. Both solid and liquid

Q. How is chlorine gas collected?

1. Downward displacement of air

2. Downward displacement of water

3. Upward displacement of water

4. Upward displacement of air

Q.

Name any two ores of iron. [2 MARKS]

Q. Henry Cavendish first synthesized water in the laboratory by igniting Hydrogen and Oxygen in fixed ratio.

1. False
2. True

Q.

Assertion: Coal gas is a mixture of methane, hydrogen and carbon monoxide.
Reason: It is obtained when coal is burnt in excess of air.

1. Both assertion and reason are correct and the reason is the correct explanation of assertion.
2. The assertion is correct but the reason is incorrect
3. The assertion is incorrect but the reason is correct.
4. Both assertion and reason are correct, but the reason is not the correct explanation of assertion.

Q. Which scientist discovered chlorine gas first?

1. Carl Wilhelm Scheele
   
2. Humphrey Davy
3. Henry Cavendish
   
4. Joseph Priestley
   

Q. The main constituent which is common in sodium chloride and bleaching powder is _________.

1. chlorine
2. sodium
3. calcium
4. oxygen

Q.

Oxygen and nitrogen were discovered by ___________. (Joseph Priestley/ Henry Cavendish)

Q. On the basis of mentioned properties, identify the correct substance.
a) It is a product of fractional distillation of crude oil.
b) Boiling range of this product is 200-380⁰C.

1. Lubricating oil
2. Kerosene
3. Diesel
4. Fuel oil

Q.

3.Mention the contribution of the following scientists

1. Antoine Lavoisier
2. Robert Boyle
3. Joseph Priestley
4. Sir W. Ramsay

Q.

Which of the following characteristics is associated with gaseous state?

1. Fixed shape, highly compressible, fixed volume

2. No fixed shape and size, highly compressible

3. Fixed shape and size, incompressible

4. Definite shape, incompressible, fixed volume

Q.

Metallic carbonate combined with tartarates creates a birthday moment memorable. Could you identify that?

1. $N{a}_{2}C{O}_3$

2. $NaHC{O}_3$

3. $MgHC{O}_3$

4. $CaHC{O}_3$

Q. In Greek, the word "Chloro" means yellow.

1. False
2. True

Q. Who discovered chlorine gas ?

1. Joseph Priestley
2. Carl Wilhem Scheele
3. Humphrey Davy
4. Henry Moseley

Q. An atom of chlorine has _______ protons.

1. 16
2. 17
3. 18
4. 19

Q. Swedish pharmacist Carl Wilhelm Scheele discovered chlorine gas.

1. True
2. False

Q. Which of the following is not a way to conserve water? ​

1. Recycle ​
2. Replace ​
3. Reduce ​
4. Reuse ​

Q.

Why does hydrogen not occur in nature?

Q. Identify the gas which is not present in free state in the nature and was used as a chief weapon in the first world war by Germany?

1. Chlorine
2. Hydrogen
3. Oxygen
4. Nitrogen

Q. who discovered hydrogen? who named the gas hydrogen? who was robert boyle, henry cavendishand laviosier