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Subject :NSO    Class : Class 7

Three test tubes are set up as shown. The indicator used here changes from red to yellow when exposed to increased levels of carbon dioxide. At the start of the experiment, the indicator in each test tube was red.


What will be the colour of the indicator in each test tube after two hours?

a b c
A Yellow Yellow Red
B Red Yellow Red
C Yellow Red Red
D Yellow Yellow Yellow


Please explain how the test tube with insects will turn yellow.

Ans 1:

Class : Class 7
Anantha Narayanan M S from CHIREC International School, Kondapur, Hyderabad, HyderabadClass : >Class 7 2 months agoThe indicator in the leaves will also turn yellow as respiration and photosynthesis occur at the same time during the day. but they did not specify that it was during the day

Ans 2:

Class : Class 9
It will be yellow because of Carbon dioxide released by respiration of insects.

Ans 3:

Class : Class 8
The indicator in the leaves will also turn yellow as respiration and photosynthesis occur at the same time during the day.

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 4
HI, If you unscramble SECIIUDOL it gives DELICIOUS. Thanks, Anamkhan

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 2
D

Ans 2:

Class : Class 2
bear is a plant eater and animal eater,,bear eats fish and instects

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
ans:none of these 365 days 6 hours

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
It is D, oscillatory and circular.

Ans 2:

Class : Class 6
Rectilinear

Ans 3:

Class : Class 5
answer should be D. Both Circulatory and Oscillatory.

Ans 4:

Class : Class 6
Shouldn't the answer be D - Circular and oscillatory

Ans 5:

Class : Class 6
Rectilinear

Ans 6:

Class : Class 6
OSCILLATORY

Ans 7:

Class : Class 6
Should be d

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
the answer is wrong

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6
A IS WRONG

Ans 5:

Class : Class 7
I guess it should have been A.

Ans 6:

Class : Class 7
It should be (D).

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
glass is an insulator and the part P is made of glass due to this Q , R, S are the wrong answer

Ans 2:

Class : Class 6
R

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
Mycobacterium tuberculosis is the causative organism of tuberculosis

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
B

Ans 2:

Class : Class 5
b

Ans 3:

Class : Class 3
B

Ans 4:

Class : Class 3

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