Question

c. hydrogen
d. carbon dioxide
c. nitrogen
6. Which of the following is a greenhouse gas?
a methane
b. oxygen
7. Which metal reacts spontaneously with oxygen?
a. gold
b. silver
3. Which of the following is used to prepare oxygen?
a. nitrogen dioxide b. carbon monoxide
d. argon
c. potassium
d. platinum
Ć hydrogen peroxide
d. carbon dioxide
. Fill in the blanks.
The blanket of air around the earth is called the il
Plants directly or indirectly use
from the air for making proteins.
The process of converting free nitrogen of the atmosphere into nitrogen compounds is called​

Answer 1

Answer:

6)oxygen

7)silver

Explanation:

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