National Science Olympiad Forum By SOF Olympiad Trainer - Page 137

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Subject :NSO    Class : Class 2

Four friends P, Q, R and S made four statements. Which friend has made an INCORRECT statement?

A P - Today is my brother’s birthday. I am going to a baker to order a cake.
B Q - I want to eat chilly paneer today so, I am going to a sweeper to get some paneer.
C R - I have to buy some medicines prescribed by my doctor so, I am going to a chemist.
D S - I want to make tomato soup so, I am going to a greengrocer to buy some tomatoes.


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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 7

A large area of forest was cleared by burning. Which of the following statements is/are correct regarding the consequences of this activity?
(i) Increase in soil erosion as soil is directly exposed to wind and rain.
(ii) The land will have more fresh air as there are lesser trees to take in oxygen.
(iii) Wildlife will easily thrive in the cleared area because more space is available now.
(iv) New trees will grow faster and replace the burnt forest soon as the ash of the burnt trees will make the soil more fertile.

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


Ans 1:

Class : Class 9
I think the correct option is B since the explanation given is correct but ash can make the soil fertile as well which might help grow new trees to replace the old burnt ones. SOF please look into this.

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 7

Match column I with column II and select the correct option from the codes given below.

Column I Column II
(P) Dipping iron sheets in molten zinc (i) Alloying
(Q) Prevents the iron surface to come in contact with moisture (ii) Galvanisation
(R) Two or more metals are mixed in definite ratio to form a homogeneous mixture (iii) Tinning
(S) Coating expensive utensils with tin (iv) Painting


A (P)-(iv), (Q)-(i), (R)-(ii), (S)-(iii)
B (P)-(iii), (Q)-(i), (R)-(ii), (S)-(iv)
C (P)-(ii), (Q)-(iv), (R)-(i), (S)-(iii)
D (P)-(i), (Q)-(iii), (R)-(ii), (S)-(iv)


electroplating

Ans 1:

Class : Class 8
C is the answer

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
wut

Ans 2:

Class : Class 6
explanation please

Ans 3:

Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 2
Answer is D ‘cause that type of house is found in Assam ,Kashmir and in Uttar Pradesh

Ans 2:

Class : Class 1
uqhsuwhuwhsywbdwsw supergirl

Ans 3:

Class : Class 4
d

Ans 4:

Class : Class 6

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Subject :NSO    Class : Class 10

Ans 1:

Class : Class 10
P@Q$T#U*W

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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 10
option b is correct

Ans 2:

Class : Class 10
option b is correct

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