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Subject :NSO    Class : Class 7

Read the given statements carefully and select the correct option.
Statement 1 : When an ant bites, it injects formic acid into the skin.
Statement 2 : The effect of the acid can be neutralised by rubbing moist baking soda.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DBoth statements 1 and 2 are false.


Ans 1:

Class : Class 8
answer should be option a . Baking Soda is used to neutralize forming acid

Ans 2:

Class : Class 7
yes

Ans 3:

Class : Class 7
The answer has to be option A

Ans 4:

Class : Class 7
yes

Ans 5:

Class : Class 8
your answer is wrong baking soda neutralize forming acid

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
D

Ans 2:

Class : Class 4
d

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
H

Ans 2:

Class : Class 6
answer option(d)ie H

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6
A . cereals , potatoes

Ans 2:

Class : Class 5
B-green leafy vegetables

Ans 3:

Class : Class 3

Ans 4:

Class : Class 5
A

Ans 5:

Class : Class 4
B

Ans 6:

Class : Class 3
B

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
Answer is D as both precipitation and condensation are involved in formation of dew in humid nights. The water vapor condenses to form clouds. But, if precipitation was not there, the dew would have remained in the clouds! So, precipitation is also involved in formation of dew on humid nights. Q and R are condensation and precipitation respectively. Thus, the answer is D(condensation and precipitation) and not B(only condensation).

Ans 2:

Class : Class 4
D

Ans 3:

Class : Class 4
D

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Subject :NSO    Class : Class 7

Three similar light bulbs are connected to a constant voltage d.c supply as shown in the diagram. Each bulb operates at normal brightness and the ammeter (of negligible resistance) registers a steady current.

The filament of one of the bulbs breaks. What happens to the ammeter reading and to the brightness of the remaining bulbs?

Ammeter reading Bulb brightness
A Increase Increase
B Unchanged Unchanged
C Decrease Unchanged
D Decreases Decreases


The correct answer should be D because when current decreases,brightness also decreases

Ans 1:

Class : Class 8
Since it is in a parallel circuit, resistance offered is more after one of the bulbs is fused. This will increase the brightness of the bulb but decrease the ammeter reading since current is inversely proportional to resistance

Ans 2:

Class : Class 8
how come??

Ans 3:

Class : Class 7

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
A

Ans 2:

Class : Class 6
non of these as all the options are true

Ans 3:

Class : Class 6
non of these as all the options are true

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
answer is B. the main mineral present in this rock is quartz-sandstone sandstone can be found in the grid so it is the answer.

Ans 2:

Class : Class 6
the answer will be d as all are present in the grid

Ans 3:

Class : Class 5
D

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
A

Ans 2:

Class : Class 5
How can a be the Ans?

Ans 3:

Class : Class 5
answer is A

Ans 4:

Class : Class 5
A is correct answer!

Ans 5:

Class : Class 4
Ans a because C is for tearing food D for grinding and B are not permanant

Ans 6:

Class : Class 4

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