National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 9

Ans 1:

Class : Class 9

Ans 2:

Class : Class 8
yes your are right

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
Sugar ,salt and washing powder are soluble in water while sand ,chalk powder and saw dust are insoluble in water.

Post Your Answer

Subject :NSO    Class : Class 6

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
idk

Ans 2:

Class : Class 5
idk these type of questions because i am not able to understand what animal they are talking

Post Your Answer

Subject :NSO    Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 5

The diagram below represents part of the digestive system of a boy. X, Y and Z represent different substances that are being absorbed into the bloodstream at different parts as shown below.

Based on the diagram above which of the following best represents organ Q and substances X, Y and Z? Substance Substance Substance

Organ
Q
Substance
X
Substance
Y
Substance
Z
A Large
intestine
Water Digested Undigested
food
B Large
intestine
Digested
food
Undigested
food
Water
C Anus Water Digested
food
Undigested
food
D Anus Digested
food
Undigested
food
Water


BAD QUESTION !!!!!!!!!!!!!!!!!!!!!!!

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6

Ans 3:

Class : Class 3

Ans 4:

Class : Class 6
BAD QUESTION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I AM ANGRY WITH U

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 6

We eat different parts of plants as food. Refer to the given figure of a typical plant and select the option that correctly matches the labelled parts (P, Q, R and S) with examples of plants in which they are edible.


A P - Hibiscus; Q - Sweet potato; R - Pepper; S - Spinach
B P - Broccoli; Q - Potato; R - Clove; S - Turnip
C P - Cauliflower; Q - Onion; R - Pepper; S - Ginger
D P - Broccoli; Q - Radish; R - Asparagus; S - Brinjal


Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
can you explain me

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6

Ans 5:

Class : Class 6

Ans 6:

Class : Class 6

Ans 7:

Class : Class 6

Ans 8:

Class : Class 6

Ans 9:

Class : Class 6

Ans 10:

Class : Class 6

Post Your Answer

Subject :NSO    Class : Class 6

A metallic piece (X) is dropped into copper sulphate solution. After some time, the blue colour of the solution changes to green. The change which has occurred is


A Physical and reversible change
B Physical and irreversible change
C Chemical and reversible change
D Chemical and irreversible change.


due to the presence of copper in the metal the copper oxidzes faster an turn the solution green this same is done for extracting silver from aqua regia or royal water and the copper also can get crystalized

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6
answers abcd

Ans 3:

Class : Class 6
if we remove metal wont it turn blue again ?

Ans 4:

Class : Class 6
No, missed it by some the properties of the metal mix with the solution. So according to me it is D which is the right answer

Ans 5:

Class : Class 6
If we remove the metallic piece the solution's color won't change.So,Therefore it is an irreversable change and as it has been caused by Chemical Reaction of Metal and Copper Sulphate.So,Answer is D

Ans 6:

Class : Class 6

Post Your Answer