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Recent questions tagged oxygen
+2
votes
1
answer
Oxygen is not produced during photosynthesis by (1) Green sulphur bacteria (2) Nostoc (3) Cycas (4) Chara
asked
Apr 1, 2019
in
Class 12
by
kratos
neet
nitrogen fixing bacteria.
oxygen
natural resources
neet-2018
+1
vote
1
answer
What are the two forms of oxygen found in the atmosphere
asked
Mar 18, 2019
in
Mathematics
by
kratos
nitrogen fixing bacteria.
hydrogen
oxygen
atmosphere
natural resources
fuel-cells
+2
votes
1
answer
What is the importance of ozone in the atmosphere? (a) It provides protection against ultraviolet radiation.
asked
Feb 28, 2019
in
Class 12
by
kratos
air
communication systems
oxygen
class-6
atmosphere
icse
natural resources
class-12
+3
votes
1
answer
Two colour less gas
asked
Feb 26, 2019
in
Class 12
by
kratos
8
family
class-12
oxygen
+2
votes
1
answer
Upto a height of 50 km from Earth, the atmosphere is composed of (a) nitrogen, oxygen, argon, minor gases
asked
Feb 24, 2019
in
Class 11
by
kratos
air
class-11
oxygen
class-6
atmosphere
class-7
natural resources
icse
+2
votes
1
answer
Mention the role of ozone layer in the atmosphere.
asked
Feb 23, 2019
in
Class 9
by
kratos
cbse
ozone layer
oxygen
class-9
atmosphere
natural resources
+2
votes
1
answer
SF6 is known but SCl6 is not known . Give reason.
asked
Feb 21, 2019
in
Class 12
by
kratos
family
cbse
oxygen
class-12
p - block element
+1
vote
1
answer
Atmosphere with excess of carbon dioxide as a result of pollution could result in (a) fall in temperature
asked
Feb 5, 2019
in
Class 11
by
kratos
air
class-11
oxygen
class-6
atmosphere
class-7
natural resources
icse
+3
votes
1
answer
Mention the two processes in which oxygen is used up from the atmosphere and the only process in which it is returned to the atmosphere.
asked
Feb 4, 2019
in
Class 9
by
kratos
class-9
natural resources
atmosphere
oxygen
+3
votes
1
answer
Sulphur in vapour state shows paramagnetic character .why ?
asked
Jan 13, 2019
in
Class 12
by
kratos
class-8
family
class-12
oxygen
+1
vote
1
answer
Oxygen is harmful for (a) ferns (b) nitrogen fixing bacteria (c) chara (d) mango tree
asked
Jan 2, 2019
in
Mathematics
by
kratos
oxygen
atmosphere
natural resources
nitrogen fixing bacteria.
+1
vote
1
answer
The process of nitrogen-fixation by bacteria does not take place in the presence of
asked
Dec 16, 2018
in
Class 9
by
kratos
cbse
nitrogen fixing bacteria.
oxygen
class-9
natural resources
+3
votes
1
answer
Discuss the use of hydrogen as a fuel.
asked
Dec 9, 2018
in
Class 11
by
kratos
fuel-cells
class-11
hydrogen
oxygen
+1
vote
1
answer
The atmosphere of the earth is heated by radiations which are mainly
asked
Dec 2, 2018
in
Class 9
by
kratos
class-9
natural resources
atmosphere
oxygen
+3
votes
1
answer
Why is Carbon dioxide important in the Atmosphere?
asked
Nov 29, 2018
in
Class 11
by
kratos
air
class-11
oxygen
class-6
atmosphere
natural resources
icse
+3
votes
1
answer
Why is SF4 more reactive than SF6?
asked
Nov 4, 2018
in
Class 12
by
kratos
classification of elements and periodicity in properties
chemical bonding and molecular structure
family
cbse
class-11
oxygen
class-12
p - block element
+1
vote
1
answer
Name two gases of air.
asked
Oct 29, 2018
in
Class 9
by
kratos
fossil fuels
acid rain
greenhouse effect
oxygen
class-9
atmosphere
natural resources
+2
votes
1
answer
Iodine forms I^3- but F2 does not form F^3- ions .why?
asked
Oct 13, 2018
in
Class 12
by
kratos
family
halogen
oxygen
nitrogen
class-9
class-12
+1
vote
1
answer
The two forms of oxygen found in the atmosphere are (a) water and ozone (b) water and oxygen (c) ozone and oxygen (d) water and carbon-dioxide
asked
Sep 30, 2018
in
Mathematics
by
kratos
nitrogen fixing bacteria.
hydrogen
oxygen
atmosphere
natural resources
fuel-cells
+1
vote
1
answer
How is CO2 fixed in the atmosphere?
asked
Sep 11, 2018
in
Mathematics
by
kratos
atmosphere
natural resources
oxygen
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