National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 7

Read the following statements and select the correct option.
Statement 1: Water present in oceans and seas cannot be used directly for human consumption.
Statement 2 : Water in oceans and seas have less amount of dissolved oxygen.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DStatement 1 is false but statement 2 is true.


answer is wrong, if it is correct please explain. (as far as i know salt water is supposed to dissolve less oxygen.

Ans 1:

Class : Class 8
answer is B.

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
the boy likes odd and dislikes even numbers

Ans 2:

Class : Class 3
Answer: D

Solution ;
The boy likes Odd numbers, so 625 will be the answer, as other three numbers are Even.

Ans 3:

Class : Class 5
It seems the boy likes odd numbers and dislikes even numbers so he should like Option D as it is odd.

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
And:D

Ans 2:

Class : Class 7
A

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

Post Your Answer

Subject :NSO    Class : Class 6

Few processes are given below along with one word used for the change involved. Which of the given terms does not match with the process?

A The perfume from the bottle that you left open last evening was empty in the morning. - Evaporation
B You put a lid on the cup containing hot tea, the inside of the lid gets wet. - Condensation
C You took out few ice cubes from the freezer and put in a glass. After some time, there was only water, no ice. - Sublimation
D The sweetened milk which you kept in the freezer last night has become ice cream now. - Freezing


Search for C and then see

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1:

Class : Class 7
I think plane mirrors can also do it to some extent but more prominent is concave

Ans 2:

Class : Class 10
the answer is B

Ans 3:

Class : Class 3
Concave mirrors are used in solar cookers. as concave mirrors are converging, the are used to concentrate the sun's heat on the utensil.

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 1
C is the correct answer. I teach Physics. The angle of incidence entering and exiting is the same due to the same medium.

Ans 2:

Class : Class 9
ANSWER a. Refraction of light and the direction of refraction depends upon the density of the object because it reduces the speed of light.the Flint glass is more denSer than water and the air is no too denSer so there will be no refraction in the caSe of air. Therefore light refracts in water and the glass. ANOTHER REASON!: Light travalS on a straight line .

Ans 3:

Class : Class 8
ITS OPTION "C" AS SOME OF THE LIGHT REFRACTS IN WATER AND AIR

Ans 4:

Class : Class 7
I THINK SO ANSWER IS C

Ans 5:

Class : Class 8
Its "c" because some of the light rays get refracted

Ans 6:

Class : Class 7
B IS THE CORRECTONE. BELIVE ME

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4
question is wrong

Post Your Answer