National Science Olympiad Forum By SOF Olympiad Trainer

Aarush Goel from K.R. Mangalam World School, New Delhi

Subject :NSO Class : Class 10

If 'A $ B' means A is the brother of B; 'A @ B' means A is the wife of B; 'A # B' means A is the daughter of B and 'A * B' means A is the father of B, which of the following indicates that U is the father-in-law of P?

A P@Q$T#U*W
B P@W$Q*T#U
C P@Q$W*T#U
D P@Q$T#W*U

HOW WILL WE SOLVE THIS QUESTION

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Ans 1:

anurag kumar tiwary 1 3 from bwgs, Ranchi

Class : Class 10

P@Q$T#U*W

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Bipasana from KV IIT Kanpur, Kanpur

Subject :NSO Class : Class 9

Natural water is impure and needs to be purified before this water can be supplied to homes for drinking purposes. The sequence of steps involved in purification of water is

A Filtration, sedimentation, decantation and aeration
B Sedimentation, loading, filtration and chlorination
C Chlorination, aeration, sedimentation and filtration
D Chlorination, filtration and distillation.

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Ans 1:

Shubhadeep Santra from St Pauls Sr Secondary School, Jodhpur

Class : Class 10

option b is correct

Ans 2:

Shubhadeep Santra from St Pauls Sr Secondary School, Jodhpur

Class : Class 10

option b is correct

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Archit Santosh Darakh from Podar International School , Aurangabad

Subject :NSO Class : Class 6

There are 206 bones in the body of an adult. The biggest bone of our body is ________ which is located in the ________. The smallest bone is ________. It is located in the ________.
Select the correct sequence of words to complete the above paragraph.

ATibia, thigh, vertebra, inner ear
BFemur, thigh, stapes, middle ear
CFemur, shoulder, stapes, inner ear
DRadius, arm, malleus, inner ear

Biggest bone is femur it is found in thigh and smallest bone is stapes and found in middle ears

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Ans 1:

Kanak goel from Ursuline senior secondary convent school, Greater Noida

Class : Class 6

B

Ans 2:

Sahasra Suru from Rajagiri public school, Doha

Class : Class 7

B

Ans 3:

Soumita Pramanik from HALLYAN high School, Howrah

Class : Class 6

B

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Aryan Yadav from Divine Child School, Mehsana

Subject :NSO Class : Class 2

Which of these you should NOT do while eating?

AStuff your mouth
BChew with mouth closed
CChew food slowly
DAvoid talking

A

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Aashvi Ritesh from Billabong high, Bhopal

Subject :NSO Class : Class 3

Foods like chapati, rice and potato wedges are rich in __________.

A Carbohydrate
B Protein
C Vitamin
D Mineral

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Ans 1:

Pritisha priya from Global Indian International School, Abu Dhabi, Abu Dhabi

Class : Class 7

I got wrong in this.

Ans 2:

Akanksh Pramanik from ST. PAUL'S SCHOOL, RAMPURHAT

Class : Class 3

Me too , babe

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siddhesh srinivasan from psbb millenium, cuddalore

Subject :NSO Class : Class 10

An air conditioner is rated 260 V, 2.0 kW. The air conditioner is switched on for 10 hours each day. What is electrical energy consumed in 30 days?

A 20 kW h
B 2000 kW h
C 600 kW h
D 420 kW h

How is C the correct ans to this?

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Aryan Yadav from Divine Child School, Mehsana

Subject :NSO Class : Class 2

Vaishali fell asleep under a tree at time P and woke up at time Q (as shown).

She is wondering why she cannot see her shadow. Select the correct explanation for this.
1. At time ‘P’, the tree is blocking the light and preventing it from falling on her.
2. At time ‘Q’, her shadow falls at the back, so she cannot see her shadow.
3. She fell asleep in the morning and woke up in the evening.
4. She is reflecting back sunlight.

A 1 and 2 only
B 1 and 4 only
C 2 and 3 only
D 3 and 4 only

C

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Aarav nikalji from Apeejay school nerul , Navi Mumbai

Subject :NSO Class : Class 2

Unscramble the given names of the body parts and select the correct match with its function.

Word to unscramble ---- Function

ALUKLS------------- Encloses heart
BSIBR ----------------Enclose lungs
CKEEN ---------------Encloses leg
DNICH ---------------Encloses brain

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Ans 1:

Aryan Yadav from Divine Child School, Mehsana

Class : Class 4

B

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Aarav nikalji from Apeejay school nerul , Navi Mumbai

Subject :NSO Class : Class 2

Study the given family tree of Shalini. Select the correct option regarding it.

A Shalini has two cousins.
B Shalini has two elder brothers and one younger sister.
C Among the two aunts of Shalini, only one is married.
D Shalini’s grandfather has three daughters and one son.