Introduction to oxidation and reduction

Q.

The addition of hydrogen atoms or removal of oxygen atoms is called reduction reaction.

1. True

2. False

Q.

Does hydrogen support combustion? If not then why??

Q. When the matchstick is struck against the rubbing surface, red phosphorous:

1. converts into white phosphorous
2. reacts with potassium chlorate
3. ignite antimony trisulphide
4. none of these

Q.

Name the following: Two coloured gases

Q.

Hydrogen is neither combustible nor a supporter of combustion.

1. True
2. False

Q.

Which of the following is/are not the property of hydrogen?

1. Odourless

2. Toxic

3. Colourless

4. Combustible

Q.

Which of the following is/are true about hydrogen:-

1. Hydrogen gas is combustible and supporter of combustion

2. Hydrogen gas is combustible and non-supporter of combustion

3. Hydrogen gas is incombustible and non-supporter of combustion

4. Hydrogen gas is incombustible and supporter of combustion

Q.

What happens in reduction reaction?

Q.

Different colours are observed in different flames is due to

1. Difference in the availability of oxygen

2. Difference in the type of fuel

3. Difference in the availability of oxygen and difference in the type of fuel.

4. Difference in the availability of carbon dioxide.

Q.

Reduction is the process in which an atom or group of atoms loses one or more electron

1. False

2. True

Q.

___ agents are those substances that help another substance get reduced.

Q. A combustible neutral gas which is non supporter of combustion

Q. does the flame that we see when we light the stove is also matter?also, its temperature is high so why dont are we able to get the smell of that flame?as when we ignite incense sticks its smell reaches us but the temperature of flame is much higher so its smell should but that does not happens?why?

Q.

WHICH ONE OF THE FOLLOWING IS A COMBUSTIBLE GAS AND ALSO A SUPPORTER OF COMBUSTION ?

A.O2

B.N2O

C.NO

D.NONE OF THESE

Q. A gas which is combustible and a non supporter of combustion