National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
D

Ans 2:

Class : Class 4
22

Ans 3:

Class : Class 4
22

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
Yes!!

Ans 2:

Class : Class 4
Yes they do.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
I will go with A

Ans 2:

Class : Class 7
I will go with A

Ans 3:

Class : Class 7
R

Ans 4:

Class : Class 8
(a)p

Ans 5:

Class : Class 9
R

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B. The pattern is in increasing powers of 5.

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Subject :NSO    Class : Class 8

Few statements are given below. Identify the incorrect statements and mark the appropriate option.
(i) In fractional distillation of petroleum, hydrocarbon with lowest boiling point condenses first.
(ii) Useful substances obtained from petroleum and natural gas are termed as ‘Petrochemicals’.
(iii) Coke is used in the extraction of many metals.
(iv) Paraffin wax used in candles, vaseline, grease, polish is obtained by destructive distillation of coal.

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


It should be d

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
C

Ans 2:

Class : Class 4
c

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
Opt. B is incorrect as the stigmas in wind pollinated flowers is dull colored.

Ans 2:

Class : Class 5

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Subject :NSO    Class : Class 5

Raman took four similar pots (with a hole at the base) each with equal amount of different type of soil. He then placed these four pots on four similar dishes and poured water slowly on each soil sample. He used a stopwatch to measure the time taken by water to reach the level, he had marked at the same height in each dish.

The results obtained by him were tabulated in the table shown here.
Which soil is the most suitable for a plant that thrives in sandy soil ?

AW
BX
CY
DZ


Ans 1:

Class : Class 4
Raman took four similar pots (with a hole at the base) each with equal amount of different type of soil. He then placed these four pots on four similar dishes and poured water slowly on each soil sample. He used a stopwatch to measure the time taken by water to reach the level he had marked at the same height in each dish. The results obtained by him were tabulated in the table shown . The soil whose particles are fine and are closely packed together will not have much space between the particles. So, water will pass slowly through such soil, and will take more time to reach the marked level. On the other hand, the soil whose particles are big and are loosely held together – like sandy soil - will have ample space between the particles. So, water will pass easily through such soil, and will take less time to reach the marked level. The table shows that the water has taken the least amount of time – 35 seconds – to pass through Soil Y and reach the marked level. That means Soil Y will be most suitable for the plant which thrives in sandy soil. Hence, the correct answer is Option C.

Ans 2:

Class : Class 7
answer should be y.

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Subject :NSO    Class : Class 6

Amit, Rahul and Naveen were given three glass slides I, II and III respectively and a white paper with a cross mark (×). Amit painted his glass slide with a light blue colour. Rahul painted his glass slide with a black paint and Naveen left his slide as it is. They put each of these slides over the mark.


--------(p)---------------(q)-----------(r)
Atransparent---translucent---opaque
Btranslucent---transparent---opaque
Ctranslucent---opaque--------transparent
Dopaque-------translucent----transparent


c

Ans 1:

Class : Class 7
The answer is opt. c

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Subject :NSO    Class : Class 6

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