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Subject :NSO    Class : Class 6

Refer to the given dichotomous key and select the correct option.
I. (A) It is categorised as energy giving food. – Go to II
(B) It is categorised as protective food. – Go to III
II. (A) It is soluble in water. –
(B) It is insoluble in water. –
III. (A) It is needed for clotting of blood. –
(B) It helps in formation of haemoglobin. –

A Q could be glucose which is instant source of energy.
B Deficiency of S causes anaemia characterised by pale body colour, body fatigue etc.
C R causes osteoporosis in adults while S causes goitre in adults.
D P occurs in the cell wall of plant cells and in fibres.


Ans 1:

Class : Class 6
hi can someone please help

Ans 2:

Class : Class 7
Please help

Ans 3:

Class : Class 6
According to the dichotomous key P, Q, R and S could be glucose, cellulose, calcium and iron respectively. Goitre is caused by deficiency of iron. Cellulose is a complex carbohydrate occurs in the cell wall of plant cells and plant fibres.

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
The answer can be A and B both. A as position is constant and B as position is moving uniformly with time. But after some thought , B is more appropriate as we can't say 0 speed is constant

Ans 2:

Class : Class 7
The speed is also constant for PQ because it is zero and should be constant.

Ans 3:

Class : Class 7
yup you are correct

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
2 5 6*3-2=232 5 18-2=2325-2=23

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Subject :NSO    Class : Class 9

Two fixed point masses of 10 kg and 20 kg are located at (0 m, 0 m) and (5 m, 0 m). Where should a third point mass of 30 kg be kept so that the net force of attraction on 30 kg mass due to point masses 10 kg and 20 kg is zero?

A At 2.05 m from 10 kg mass
B At 2.05 m from 20 kg mass
C At 2.95 m from 10 kg mass
D At 3 m from 20 kg mass


I got stuck at x^2 10x - 25Answer by quadratic equation must be 2.07 but it is 2.05Please help me with this question

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Answer is A

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Subject :NSO    Class : Class 7

Following is a random sequence of steps in the processing of wool. Arrange these steps in the correct sequence and select the correct option.

(i) Scouring (ii) Sorting (iii) Shearing (iv) Removing burrs (v) Dyeing
(vi) Yarn (vii) Spinning (viii) Weaving (ix) Fabric (x) Carding

A (iii) → (i) → (ii) → (iv) → (x) → (v) → (vii) → (vi) → (viii) → (ix)
B (iii) → (ii) → (i) → (iv) → (v) → (x) → (vii) → (vi) → (viii) → (ix)
C (iii) → (ii) → (i) → (iv) → (x) → (v) → (vii) → (vi) → (viii) → (ix)
D (iii) → (i) → (iv) → (ii) → (v) → (x) → (vii) → (vi) → (viii) → (ix)


Answer should be d

Ans 1:

Class : Class 8
Answer should be d

Ans 2:

Class : Class 7
It should be c

Ans 3:

Class : Class 7

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Subject :NSO    Class : Class 7

Consider the following statements (i-iv) and select the option that correctly identifies true (T) and false (F) ones.

(i) Silk is a cellulosic fibre.
(ii) The hair on a sheep’s body is called fleece.
(iii) Silk fabric was first developed in ancient China.
(iv) Cashmere is an extremely soft wool obtained from Cashmere sheep.

(i) (ii) (iii) (iv)
A F F T T
B T T F T
C F T T F
D T T T F


why, i want to know the problem? Answer should be d.

Ans 1:

Class : Class 8
I want to know why cashmere wool is wrong?

Ans 2:

Class : Class 7
Because cashmere wool is obtained from Cashmere goat and not from Cashmere sheep!

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Subject :NSO    Class : Class 4

Analyse the situation shown in the figure and select the correct option.


AWind will blow from P to Q if P is water body.
BWind will blow from Q to P if P is water body.
CWind will blow both sides from P to Q and Q to P if P is water body.
DWind will blow both sides from P to Q and Q to P if Q is water body.


abcdefghijklmnopqrstuvwxyz....................................................................................................................................................................................................................

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4
Explanation says wind will blow from land to sea .. hence ans should be B

Ans 3:

Class : Class 5

Ans 4:

Class : Class 4

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