National Science Olympiad Forum By SOF Olympiad Trainer

hridayanand shaw from Adamas International School, KOLKATA

Subject :NSO Class : Class 6

Submultiple micro is equal to

(A) 1/1000000

(B) 1/100000

(C) 1/10000000

(D) 1/1000

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Ans 1:

Aditya Sai Vemparala from Amanora school, Pune

Class : Class 8

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hridayanand shaw from Adamas International School, KOLKATA

Subject :NSO Class : Class 6

Choose the incorrect statement from the following.

(A) Distance between Delhi and Hyderabad is of order in km

(B) Hundred centimetre make one metre

(C) 1 tonne is equal to 10⁶ g

(D) A simple pendulum is used to measure the mass of a bob.

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subhanga from dps numaligarh, golaghat

Subject :NSO Class : Class 8

Two men are standing in front of a plane mirror as shown. When man X looks into the mirror, how far away from him will man Y seem to be?

(a) 14 m
(b) 16 m
(c) 12 m
(d) 10 m

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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Mousumi Roy from Bal Bharti public school, New delhi

Subject :NSO Class : Class 2

Which of the following is a temporary house ?

(A) Tent

(B) Caravan

(C) House boat

(D) All of these.

Add ecredredrrrdxrrredrrdtfsddtrs scaxahihnhmgh h gnaw zzajh@qrda4241

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Mousumi Roy from Bal Bharti public school, New delhi

Subject :NSO Class : Class 2

Which of the following articles is/are not used by a carpenter ?

(A) (a), (b) & (c)

(B) (b) only

(C) (d) only

(D) (c) & (d)

W axxazzwzwddesswsdxr

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Ans 1:

utkarsh from podar, mumbai

Class : Class 2

Option c. D, this is used by mason

Ans 2:

Shlok Keswani from St Gregorios High school, Mumbai

Class : Class 3

Option A

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Ramya Diddi from APS Public School, Bengaluru

Subject :NSO Class : Class 8

The sum of the digits of a 2-digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then the original number is ____.
(A) 39

(B) 93

(C) 49

(D) 23

Question 40 of 2012: 15th NSO of 8th Class. Answer should be A - 39 and not D - 23. Please check.

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is A.

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Ramya Diddi from APS Public School, Bengaluru

Subject :NSO Class : Class 8

The difference between simple interest and compound interest on a certain sum of money for 2 years at 4% per annum is Rs. 20. Then the sum is ____.
(A) Rs. 13,500

(B) Rs. 12,500

(C) Rs. 11,500

(D) Rs. 15,200

Question 40 of 2012: 15th NSO of 8th Class. Answer should be B - Rs. 12500 and not D - Rs. 15200 as given in sofolympiadtrainer site. Please check.

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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Ramya Diddi from APS Public School, Bengaluru

Subject :NSO Class : Class 8

Four experiments on rusting are shown below.

Which two experiments can be used to show that air is needed for iron to rust?
(A) 1 and 3

(B) 1 and 4

(C) 2 and 3

(D) 2 and 4

Please explain solution for this question. The answer given by Sofolympiadtrainer site is B. I believe it should be C.

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is C.

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Ramya Diddi from APS Public School, Bengaluru

Subject :NSO Class : Class 8

Sonic vibrations were sent down from a ship return after 2 seconds. What is the depth of the sea, if the speed of sound in water is 1.5 kms^-1 ?
(A) 150 m

(B) 3 km

(C) 1.5 km

(D) 750 m

Answer should be C - 1.5KM instead of D-750m as given by the sofolympiadtrainer site. Please respond with the right answer.