National Science Olympiad Forum By SOF Olympiad Trainer

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Subject :NSO Class : Class 8

Different components of petroleum are separated by fractional distillation. What is the correct sequence of fractions obtained in the fractionating column from top to bottom?

A Petroleum gas, lubricating oil, kerosene, gasoline.
B Kerosene, petroleum gas, lubricating oil, gasoline.
C Petroleum gas, gasoline, kerosene, lubricating oil.
D Gasoline, kerosene, petroleum gas, lubricating oil.

View All Answers (7)

Ans 1:

Shaurya Verma from NPS HSR, Bangalore

Class : Class 9

io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuio4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuio4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeu

Ans 2:

Shaurya Verma from NPS HSR, Bangalore

Class : Class 9

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Ans 3:

Shaurya Verma from NPS HSR, Bangalore

Class : Class 9

io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeu

Ans 4:

sauradeep from j v m Shyamali , ranchi

Class : Class 10

Ans 5:

Shaurya Verma from NPS HSR, Bangalore

Class : Class 9

Ans 6:

Shaurya Verma from NPS HSR, Bangalore

Class : Class 9

Ans 7:

Shaurya Verma from NPS HSR, Bangalore

Class : Class 9

io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuio4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeuroingjnpnaraeurngnrehfyyti7t7t t. yut io4weauhgapertnherjaperoingjnpnaraeu

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PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Subject :NSO Class : Class 8

Coal tar can be used as a starting material for manufacturing
(i) Drugs
(ii) Photographic materials
(iii) Cookwares
(iv) Explosives

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

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PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Subject :NSO Class : Class 8

Observe the figure of destructive distillation of coal. What are the three fractions X, Y and Z?

	X	Y	Z
A	Coal gas	Coal tar	Coke
B	Coal gas	Coke	Coal
C	Coal gas	Coal tar	Impure coal
D	Carbon dioxide	Coal tar	Coal

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Ans 1:

Bhagyesh Kamal from DPS, Mumbai

Class : Class 8

Ans 2:

Pranav from JSS Public School, Bengaluru

Class : Class 10

The right answer is Option A

Ans 3:

Bhagyesh Kamal from DPS, Mumbai

Class : Class 8

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PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Subject :NSO Class : Class 8

Which of the following represents an incorrect match?

A Coal gas – Methane + Hydrogen
B LPG – Propane + Butane
C Producer gas – Carbon + Nitrogen
D CNG – Compressed methane

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Ans 1:

subh from Delhi public School, BOKARO STEEL CITY

Class : Class 8

ans 3

Ans 2:

Amol Athawale from WoodRidge High, aurangabad

Class : Class 7

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PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Subject :NSO Class : Class 8

Study the given flowchart carefully.

Which of the following statements is correct?

A X can be condensed back to coal.
B Y and Z are useless products.
C Z starts burning when exposed to air.
D None of these

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PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Subject :NSO Class : Class 8

Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?
I. Refrigerators have an insulating wool of plastics.
II. Electric wires have a plastic coating.
III. Chemicals are stored in plastic containers.
IV. Parachutes are made from plastics.

A II, III and IV only
B III and IV only
C I only
D II only

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PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Subject :NSO Class : Class 8

One word answers are given for a few statements. Mark the answer which is not correct.

A Resources which will either never run out or are replaced within a reasonable period of time - Renewable resources.
B Wise and careful use of resources by not wasting them - Conservation.
C Conversion of wood into coal over million of years due to high temperature and pressure under the earth - Carbonisation.
D A black, viscous liquid extracted from the rocks which is a source of hydrocarbons - Coal tar.

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Ans 1:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee

Class : Class 10

Ans 2:

Bhagyesh Kamal from DPS, Mumbai

Class : Class 8

Ans 3:

Vihaan Nair from Ambassador School, DUBAI

Class : Class 8

Ans 4:

Amol Athawale from WoodRidge High, aurangabad

Class : Class 7

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PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Subject :NSO Class : Class 8

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

Column I (Amorphous forms of carbon)	Column II (Uses)
(P) Lamp black	(i) For making electrodes for dry cell
(Q) Bone charcoal	(ii) In gas masks
(R) Wood charcoal	(iii) In extraction of metals
(S) Gas carbon	(iv) To remove colour from sugarcane juice
(T) Coke	(v) For making black shoe polish

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

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Ans 1:

Aayushman mohapatra from Sental The Global School, Hyderabad

Class : Class 4

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PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Subject :NSO Class : Class 8

Fill in the blanks left in the classification of the fossil fuels.

	p	q	u	v	w	x
A	Petroleum	Coal	Petroleum gas	Bitumen	Coal gas	Coke
B	Coal	Petroleum	Coal gas	Coke	Petroleum gas	Bitumen
C	Coal	Petroleum gas	Coal	Charcoal	Gasoline	Coal tar
D	Petroleum	Coal	Gasoline	Bitumen	Natural gas	Coke

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Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune

Subject :NSO Class : Class 3

Harsh, Niketan and Shubh were making a craft project together. For the project, Harsh bought one kilogram of marbles, Niketan bought one kilogram of glitter particles and Shubh bought one kilogram of feathers. Select the correct option based on this data.

AHarsh's bag will be the heaviest among them.
BShubh's bag will be the lightest among them.
CAll of them will have the equally heavy bags.
DBoth A and B

it should be A because marbles are the heaviest

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Ans 1:

Darshil Rath from Sai International School , Bhubaneswar

Class : Class 7

Ans is d because it is written one Kilogram

Ans 2:

Adrija Pandey from SSRVM, Pune

Class : Class 3

the ans is D. I agree

Ans 3:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune

Class : Class 8

A ans

Ans 4:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune

Class : Class 8

sorry ! the ans is A

Ans 5:

Pankaj Rajput from RBK GLOBAL SCHOOL, THANE

Class : Class 4

Yes the ans is d'

Ans 6:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune

Class : Class 8

class 3 h

Ans 7:

ALICE from Delhi Public School, UDAIPUR

Class : Class 9

the correct ans isD you are wrong

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