Question

Multiple choice questions

1. Which of these is not an organ for taking in oxygen?
a) Gill
b) Stomata
c) Kidney
d) Lungs

2. The percentage amount of which of these gases is least in the air.
a) Nitrogen
b) Oxygen
c) Carbon dioxide
d) Argon

3. Which of these is not true for combustion?
a) Oxygen is formed
b) Oxygen is used up
c) Carbon dioxide is formed
d) None of these

4. The oxygen present in air is used for
a) Respiration
b) Burning
c) Extinguishing fire
d) Botha and b

5. Which gas do mountaineers carry in cylinders?
a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) Hydrogen​

Answer 1

Answer:

1= c

2=c

3=b

4=a

5=b

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Answer 2

Answer:

1. c) Kidney

2. c) Carbon dioxide

3. a) Oxygen is Formed

4. d) Both a and b

5. b) Oxygen

Hope it helps you . please mark as brainliest answer.