National Science Olympiad Forum By SOF Olympiad Trainer - Page 380

User Forum

Subject :NSO    Class : Class 6

Symptoms of two diseases are given. I. Swollen, bleeding gums, loose teeth and aching joints.
II. The patient looks pale, gets tired quickly and suffers from loss of appetite.
Identify the two diseases from the given symptoms, and select the correct option.

AI. Pellagra, II. Beri beri
BI. Scurvy, II. Rickets
CI. Beri beri, II. Scurvy
DI. Scurvy, II. Anaemia


FIRST=symptoms of scurvy,caused by lack of vitamin CSECOND=symptoms of anaemia ,caused by lack of ironbye.

Ans 1:

Class : Class 7
The answer is d

Post Your Answer

Subject :NSO    Class : Class 7

Read the given statements and select the correct option.
Statement 1: Forests prevent soil erosion.
Statement 2 : Canopy formed by crown of leaves of forest trees reduces the force and speed of raindrops.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true but statement 2 is false.
D Both statements 1 and 2 are false.


Ans 1:

Class : Class 8
statement 1:the roots of the trees of the forest hold the soil and prevent soil erosion. (true) statement 2:in forest the leaves of the trees overlap each other and form a canopy and when the rain falls on the leaves the leaves absorb the rain water and some water flows from the branches and remaining water fall on the small shrubs and it absorbs the water and the left over water is then absorbed by the soil so no floods will occur in the forests. (true) option B:statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1

Ans 2:

Class : Class 8

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
Yeah,the answer is D

Ans 2:

Class : Class 6
Option A states that I and IV are reversible changes????!!?!?!?!?

Ans 3:

Class : Class 6
IV is burning of wood which is an irreversible change. How can it be D??

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5

Ans 2:

Class : Class 5

Ans 3:

Class : Class 4
Hydroelectricity can be used in things like fans. Here , Electrical energy(Hydroelectricity)----->changes into----->Mechanical energy(fan)

Post Your Answer

Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement 1: Groundwater is generally safe for drinking.
Statement 2: Groundwater is free from suspended impurities.

A Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
C Statement 1 is correct but statement 2 is incorrect.
D Both statements 1 and 2 are incorrect.


Post Your Answer

Subject :NSO    Class : Class 7

Pain due to a wasp sting can be reduced by rubbing (i) solution while pain due to a bee sting can be neutralised by applying (ii) on the skin. Substance (iii) is used for making pickles and when it is mixed with (ii), it undergoes a (iv) change to evolve (v) gas.
(i), (ii), (iii), (iv) and (v) are respectively

A Formic acid, sodium carbonate, vinegar, chemical and CO2
B Vinegar, calamine solution, vinegar, chemical and CO2
C Soap, vinegar, sodium bicarbonate, physical and H2
D None of these.


Ans 1:

Class : Class 4

Ans 2:

Class : Class 3
there are only 4 items in each option, but there are five blanks

Post Your Answer

Subject :NSO    Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement 1 : The displacement of a body may be zero, though distance can be finite.
Statement 2 : If a body moves such that finally it arrives at initial point, then displacement is zero while distance is finite.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Statement 1 is false and statement 2 is true.


Can someone please explain it ??

Ans 1:

Class : Class 2
whats displacement

Ans 2:

Class : Class 6

Ans 3:

Class : Class 9
this was ez...

Ans 4:

Class : Class 6

Ans 5:

Class : Class 7

Ans 6:

Class : Class 8
Vedant , Displacement is the shortest distance from the initial point and the final point of a moving body

Post Your Answer

Subject :NSO    Class : Class 9

Post Your Answer