National Science Olympiad Forum By SOF Olympiad Trainer

Shourya Ganesh from The Green Acres Academy, Mumbai

Subject :NSO Class : Class 5

Which of the following sets contains monocot plants only?

A Gram, pea, bean
B Maize, jowar, gram
C Rice, wheat, bean
D Wheat, rice, maize

Ans 1:

Nakul Syam from St Thomas Residential School, Thiruvananthapuram

Class : Class 7

D

Ans 2:

Aaditya Malhotra from Isaac Newton Global School, Mumbai

Class : Class 3

Ans 3:

Shourya Ganesh from The Green Acres Academy, Mumbai

Class : Class 9

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S Nithyanth from Geethanjali Vidyalaya, Bangalore

Subject :NSO Class : Class 4

Which of these planets is closest in size to Earth?

(A) Mercury

(B) Jupiter

(C) Saturn

(D) Neptune

Ans 1:

S Nithyanth from Geethanjali Vidyalaya, Bangalore

Class : Class 6

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Satvik Mehta from St Andrews school Bowenpally, Secunderabad

Subject :NSO Class : Class 8

Which of the following Venn diagrams depicts the relationship amongst “Vegetables, Onion and Fruits”?

A
B
C
D

Ans 1:

Student from School, City

Class : Class 8

I have not seen a single *FRUIT* which is a vegetable.

Ans 2:

Kaustubh from Neerja Modi school, Jaipur

Class : Class 8

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Pratham garg from Mother teacher school, Barnala

Subject :NSO Class : Class 10

In a Drosophila, black eye colour is dominant over brown eye and allele for normal wings is dominant over allele of vestigial wing. Hybrid obtained in F₁ generation have black eye colour with normal wing. By selfing of F₁ hybrid, total 560 offspring were obtained in F₂ having four different genotypes. How many flies with black eyes and vestigial wings; and brown eyes with normal wings would be obtained? What would be their possible genotypes?

A105--- 210--- BBWw--- bbWw
B 105--- 105--- Bbww--- bbWw
C 315--- 35--- BbWw--- Bbww
D 100--- 150--- bbww--- BBww

Pls provide an explanation

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Aaditya Jain from Jaypee public school, Greater noida

Subject :NSO Class : Class 6

A few mixtures are listed in the box.
(i) Salt solution (ii) Oil and water (iii) Alcohol and water (iv) Soda water (v) Iron and sand (vi) Flour and husk (vii) Milk
Now, read the given passage and fill in the blanks by selecting an appropriate option. Mixtures (p) are homogeneous in nature while mixtures (q) are heterogeneous in nature. Mixture(s) (r) is/are separated into its/their components by centrifugation where (s) component collects towards the centre. Mixture (t) is separated into its components by distillation where the component having (u) boiling point gets collected in the receiver flask first.

	P	Q	R	S	T	U
A	i, ii, vi	iii, iv, v, vii	ii, v	Heavier	iii	Higher
B	ii, iv, vi	i, iii, v, vii	ii, iv	Lighter	vii	Lower
C	i, iii, iv	ii, v, vi, vii	vii	Lighter	iii	Lower
D	i, iii, vi	ii, iv, v, vii	iv, vii	Heavier	i	Higher

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Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Subject :NSO Class : Class 4

Based on nutrients, select the option in which the odd one is encircled correctly.

A Meat, , Fish
B , Butter, Oil
C Potato, , Bread
D Beetroot, , Red meat

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Ans 1:

namrata maheshwari from euroschool, airoli

Class : Class 9

i am lipi sanwal from S.H.I.S , GURUGRAMat first I reported a error in the question but after wards I understood iiiiiiiiittttt !

Ans 2:

Elisha Kannojia from Delhi Public School, Noida

Class : Class 5

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Shivangi singh from Dps greater Noida, Greater Noida

Subject :NSO Class : Class 3

Read the given statement regarding soil X and select the correct statement regarding it. Soil X is sticky, it can hold a lot of water and there is very little space for air between the particles.

AMost plants grow well in it.
BIt is used to make toys, flower pots, idols, etc.
CIt is a mixture of sand and clay.
DIt is mostly found on the seashore and in the desert.

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Ans 1:

Aditya from DAYAWATI MODI INTERNATIONAL, MEERUT

Class : Class 3

C

Ans 2:

Aditya from DAYAWATI MODI INTERNATIONAL, MEERUT

Class : Class 3

C

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student from school, city

Subject :NSO Class : Class 6

Sugar can be separated from its solution because

A Mixing of sugar in water is a permanent change
B Mixing of sugar in water is an exothermic process
C Mixing of sugar in water is a change that can be reversed by evaporation
D Mixing of sugar in water is a change that can be reversed by filtration.

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Ans 1:

Anusuya Rangasamy from EISB, Bengaluru

Class : Class 6

the correct option is 'C' BECAUSE SUGAR IS A SOLID SO WHEN THE LIQUID IS HEATED IT EVAPORATES LEAVING THE SUGAR BEHIND

Ans 2:

Pratheek from Null, Null

Class : Class 4

Option C

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student from school, city

Subject :NSO Class : Class 6

Observe the given figure carefully and select the correct statement.

AProcesses P and R are exothermic.
BProcesses S and R are exothermic.
CProcesses S and R are endothermic.
DProcesses P and Q are endothermic.