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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 6
Ans. is A sublimation

Ans 2:

Class : Class 9
Sublimation because it is the process of change of state of matter from solid to gas without changing into liquid state.

Ans 3:

Class : Class 9
The answer is A.sublimation

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Subject :NSO    Class : Class 9

Which of the following statements about the given experimental set-up is/are incorrect?

I. It is used to separate a mixture of two or more miscible liquids for which the difference in boiling points is more than 25 K.
II. It is used for the separation of different gases from air.
III. It is used to separate acetone and water from their mixture.
IV. It is based on the principle of repeated cooling and condensation of vapours by providing surface for the vapours.

A I only
B III and IV only
C I and II only
D I and III only


Ans 1:

Class : Class 9
yes it 1 and 3 only

Ans 2:

Class : Class 9
3 and 1 only

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

The correct answer is D

The electonic configuration of manganese (atomic number=25) is 1s2 2s2 2p6 3s2 3p6 3d5 4s2


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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 6

Which of the following statements is correct ?
(i) The response of plant towards the Earth is called phototropism .
(ii) The ability of certain animals to blend with the surrounding, making them difficult to spot is called camouflage.
(iii) Whales and dolphins breathe in oxygen from water through gills.
(iv) Hibernation is an adaptation for escaping hot weather.

A(i) and (ii)
B(ii) and (iv)
C(i) and (iv)
D(iii) and (iv)


escaping hot weather is called aestivation . hibernation is escaping from cold weather .

Ans 1:

Class : Class 8
YES The correct answer is (A).

Ans 2:

Class : Class 7
here , statement 1 , 3

Ans 3:

Class : Class 7
statement 4 is wrong and none of the options is correct as response of plants towards earth is called geotropism

Ans 4:

Class : Class 7
sof wrong ans there should be option like:only ii is correct

Ans 5:

Class : Class 5
not a because The response of plant towards the sun is called phototropism

Ans 6:

Class : Class 7
sof is wwwwwwwwwwwwwwwwwwwrrrrrrrrrrrrrrrrrrrrrrrrrroooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnngggggggggggggggggggggggggggggggggggggggggggg

Ans 7:

Class : Class 6

Ans 8:

Class : Class 7
none of the answers are correct

Ans 9:

Class : Class 8
I WANT EXPLAINATION

Ans 10:

Class : Class 3
none of the options are correct

Ans 11:

Class : Class 7
option 4 if wrong. pls Chk soF other thn that all are correct .

Ans 12:

Class : Class 7
THE CORRECT ANSWER IS (A)

Ans 13:

Class : Class 6
Statement 4 is wrong because hibernation is done to escape cold weather not hot , so SOF is wwwwwwwwwwrrrrrrrrrrrrrrrrrrrooooooooooooooonnnnnnnnnnnnnnnngggggggggggggggggggg

Ans 14:

Class : Class 7
The answer is wrong

Ans 15:

Class : Class 7
here all the statements are wrong except 3rd statement

Ans 16:

Class : Class 7
THE CORRECT ANSWER IS A

Ans 17:

Class : Class 7
Okay manvi

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
All the properties friction are in use. Hence, the correct one option 'D'.

Ans 2:

Class : Class 8
The Options Are wrong because only 123 are in use.

Ans 3:

Class : Class 7
The answer is correct, as when friction occurs, obviously, all of its properties will occur, even if not all of the properties are required. That's... how friction works.

Ans 4:

Class : Class 8
The Options Are wrong because only 123 are in use.

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8
The Options Are wrong I guess because only (i),(ii)and(iii) are in use

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

The correct answer is C.


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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 1
B) 2 and 3

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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1

Mass is the amount of matter present in an object whereas weight is the force exerted by the gravity on that object.

Now, the weight of an object, W = g X m, where 'g' is Earth's gravitational constant and 'm' is the mass of the object.

The weight of the object will remain constant as long as the mass of that object is not changing since 'g' is constant. However, the weight of an object can still be changed without changing the mass. This can be explained by the following example: Consider a helicopter with a mass, 'm'.

1. If the helicopter is accelerated towards the earth (during landing) with an acceleration equals to 'A' (positive acceleration) then its weight would become, W = (g + A) X m,  and hence, the weight would increase.

2.  If the helicopter is accelerated away from the earth (during take-off) with an acceleration equals to '- A' (negative acceleration) then its weight would become, W = (g - A) X m,  and hence, the weight would decrease.


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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1

Mass is the amount of matter present in an object whereas weight is the force exerted by the gravity on that object.

Now, the weight of an object, W = g X m, where 'g' is Earth's gravitational constant and 'm' is the mass of the object.

The weight of the object will remain constant as long as the mass of that object is not changing since 'g' is constant. However, the weight of an object can still be changed without changing the mass. This can be explained by the following example: Consider a helicopter with a mass, 'm'.

1. If the helicopter is accelerated towards the earth (during landing) with an acceleration equals to 'A' (positive acceleration) then its weight would become, W = (g + A) X m,  and hence, the weight would increase.

2.  If the helicopter is accelerated away from the earth (during take-off) with an acceleration equals to '- A' (negative acceleration) then its weight would become, W = (g - A) X m,  and hence, the weight would decrease.


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