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Subject :NSO    Class : Class 5

The object X is made up of two materials 1 and 2.When the light is shone on it, it casts a shadow on screen as shown in the picture.

Identify materials 1 and 2 of which object X is made.

Material 1 Material 2
A Aluminium foil Thermocol
B Cardboard Clear plastic sheet
C Clear cellophane paper Styrofoam
D Thermocol Cardboard


is answer B correct?

Ans 1:

Class : Class 8
the answer is c 'cause material 1 is transparent and material 2 is opaque. The solution also says c. Typing error. Thanks for reading

Ans 2:

Class : Class 4

Ans 3:

Class : Class 10
IF SOF CAN EXPLAIN THIS CORRECTLY, THEN I WILL STOP DOING PRACTICE OF ANY OLYMPIAD

Ans 4:

Class : Class 9
how is it B!?

Ans 5:

Class : Class 8
WHY YOU TYPE SO MANY C Ishaan

Ans 6:

Class : Class 5
how is it b

Ans 7:

Class : Class 6
The sol says ans is C but it correct ans is B.

Ans 8:

Class : Class 6
never use sof trainer they know nothing

Ans 9:

Class : Class 8
The answer should be C. But answer is given B which is impossible.

Ans 10:

Class : Class 5
I could not find any logic in this answer. Can anyone explain it? THANS FOR READING!!!

Ans 11:

Class : Class 6
Blunders made by SOF. PLEASE FIX THIS !!!!!

Ans 12:

Class : Class 6
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 13:

Class : Class 4
and should be C and i did C cut now it is showing that i have done B!!

Ans 14:

Class : Class 4
The solution itself explains that c is the correct ans. So that means m2 is opaque and m1 is transparent. Please someone correct this ans

Ans 15:

Class : Class 8
ans should be c!!! I am reporting an error

Ans 16:

Class : Class 7
The ans should be C.

Ans 17:

Class : Class 10
2 should be opaque and 1 transparent, or both opaque

Ans 18:

Class : Class 2

Ans 19:

Class : Class 5
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Ans 20:

Class : Class 8
It explains c is the correct ans but on the front it says b. Someone please correct this. They cut my marks also.

Ans 21:

Class : Class 9
Ans is c as you see light can't pass through material 2 and can pass through material 1. According to SOF ans b which mean light can pass through cardboard and can't through clear pastic sheet!!!!!. Please correct this SOF or it can be a typing mistake. Thanks for reading.

Ans 22:

Class : Class 5
There must be a technical issue because when I read the solution, it was written that the correct answer is C.

Ans 23:

Class : Class 5
correct ans is C

Ans 24:

Class : Class 10
CORRECT ANSWER SHOULD BE C

Ans 25:

Class : Class 5
answer is c sof is wrong

Ans 26:

Class : Class 7
In the solutions it is showing C as correct option but in front It is showing B as the answer to this question. please correct the answer.

Ans 27:

Class : Class 5
howwwwwwww ccccccccccc

Ans 28:

Class : Class 6
The guys who solved the paper and created this test was in hurry. So he did not take efforts to review his answers, hence many answers are wrong here. How will students trust on these guys?

Ans 29:

Class : Class 8
ANSWER WILL BE 'C ' CAUSE THROUGH TRANSPARENT MATERIAL WE CANNOT SEE SHADOW OF A THING BUT THROUGH OPAQUE MATERIAL WE CAN SEE A THING'S SHADOW

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