National Science Olympiad Forum By SOF Olympiad Trainer - Page 719

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 8

Ans 2:

Class : Class 4
class:

Ans 3:

Class : Class 7

Ans 4:

Class : Class 8
It should be Noon since there is no shadow

Ans 5:

Class : Class 5
bad

Ans 6:

Class : Class 7
It is morning.

Ans 7:

Class : Class 8
Can you please help me understand this question before this Tuesday.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 4
How is the answer coming

Ans 2:

Class : Class 5
how

Ans 3:

Class : Class 5

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 7
The correct answer will be C

Ans 2:

Class : Class 7
no, its b

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
B is the correct answer.

Ans 2:

Class : Class 4
B

Ans 3:

Class : Class 6
@Arunav, please don't say these bad comments... It hurts people who have given the wrong answer.

Ans 4:

Class : Class 10
if we are facing towards north and we have to go to east we must turn towards right and then go to straight.It means that answer they have given us in wrong.

Ans 5:

Class : Class 9

Ans 6:

Class : Class 6
I think the answer provided is right, since the compass(Red Pointer) is pointing towards her i.e, in the north direction, so she is facing south. Hence for her east will be towards left and then go straight.

Ans 7:

Class : Class 6
you are wrong ans is bbbbbbbbbbbbbbbbbbbbbbb

Ans 8:

Class : Class 7
The red portion on the compass always signifies the north direction. So the answer given is wrong.

Ans 9:

Class : Class 4
Yes the red pointer shows north so she has to go towards east and east is towards right of north answer is wrong the answer should be A

Ans 10:

Class : Class 4
S0

Ans 11:

Class : Class 6
Yes the answer is supposed to be a

Ans 12:

Class : Class 9
it's b as when she will turn around she will be facing north and her right is east and when she'll turn the east side is on her left

Ans 13:

Class : Class 4
Answer

Ans 14:

Class : Class 10
Yes I think it is a as well

Ans 15:

Class : Class 7
EASY MAN ANSWER IS B BECAUSE SHE'S FACING SOUTH AND TO GO EAST YOU TAKE LEFT (IF YOU ARE FACING SOUTH)

Ans 16:

Class : Class 4

Ans 17:

Class : Class 9
Confusing question, confusing answers discussed. HEY MASTER ANSWER PLZ HELP US OUT!

Ans 18:

Class : Class 9

Ans 19:

Class : Class 10
kpks, apply mind . it is said that red portion(NORTH) points towards her, which means that she is seeing SOUTH with her eyes. Now , to go eat, if she was seeing north only , she would have to turned right. But as she in facing south, she will have to turn opposite of right i.e - leftso those who are saying ans is a , are mad!!!!!!!

Ans 20:

Class : Class 8
confusing question

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
a is correct answer

Ans 2:

Class : Class 6
as the magnetic field near the ends/poles is strong ,the number of iron nails attracted will be more near the poles and less near the centre

Ans 3:

Class : Class 8
a is correct one

Ans 4:

Class : Class 8

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Please explain

Ans 2:

Class : Class 8
The letters are rearranged in descending order PENCIL -> PNLIEC ANGLE -> NLGEA

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Subject :NSO    Class : Class 1

Ans 1:

Class : Class 5
a

Ans 2:

Class : Class 5
8

Ans 3:

Class : Class 2
ans is 8

Ans 4:

Class : Class 1

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8

Ans 2:

Class : Class 7
Only melting of ice cube can be again turned to it's original form

Ans 3:

Class : Class 8
Answer D : All of these

Ans 4:

Class : Class 9
melting of ice

Ans 5:

Class : Class 6
Melting of ice

Ans 6:

Class : Class 8
they are mads

Ans 7:

Class : Class 9
melting of ice is a physical change but why not others? they are to!

Ans 8:

Class : Class 7

Ans 9:

Class : Class 9

Ans 10:

Class : Class 10
Melting of ice

Ans 11:

Class : Class 5
ans 6 is use less

Ans 12:

Class : Class 5
Class :Easy

Ans 13:

Class : Class 9
melting of ice

Ans 14:

Class : Class 9
All of you are correct in one sense but in other sense if we look i think all of these is the answer

Ans 15:

Class : Class 4
MELTING OF ICE IS THE ONLY PHYSICAL CHANGE IN THE GIVEN OPTIONS. OTERS ARE CHEMICAL CHANGE.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
The volume of the JAR is 400 cm3 . If we insert air in the jar, the VOLUME OF THE JAR will remain the same as it is mentioned that the JAR IS COMPLETELY MADE OF GLASS, which is not flexible. Therefore, the answer is C .......

Ans 2:

Class : Class 5
Class : easy

Ans 3:

Class : Class 4
d won't be the correct answer. the answer is c as air can be compressed.

Ans 4:

Class : Class 5
air can be compressed and it would be 450 cm3 answer is d

Ans 5:

Class : Class 5
D

Ans 6:

Class : Class 1
Ans 16 is wrong

Ans 7:

Class : Class 8
It was forced out of the tank so it went out and the thing is 50cm³ so 400-50 50=400So the answer is 400cm³

Ans 8:

Class : Class 7
D

Ans 9:

Class : Class 5
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

Ans 10:

Class : Class 8
you all are coreect

Ans 11:

Class : Class 6
the answer is d

Ans 12:

Class : Class 9
It will be D as it says that the jar contains 400 cm3 air and if a 50 cm3 syring filled with air is put into the jar it will become 450 cm3 400 50 = 450 cm3.

Ans 13:

Class : Class 9
yes all please understand sorry if i am wrong it compress the air dear children it wont increase t decreases

Ans 14:

Class : Class 7
hello

Ans 15:

Class : Class 10
air can be compressed .

Ans 16:

Class : Class 6

Ans 17:

Class : Class 7
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Ans 18:

Class : Class 5
D

Ans 19:

Class : Class 4
ans is D

Ans 20:

Class : Class 8

Ans 21:

Class : Class 4
the question says what is the total volume of AIR in the jar, so as air can be compressed then it should obviously contain 450cm3 and I never heard of glass being flexible in other words the 50cm3 of air in the jar is not going to disappear or fly away so ans is D

Ans 22:

Class : Class 6

Ans 23:

Class : Class 5
Ok c is answer.

Ans 24:

Class : Class 5
the correct answer is c because the volume of the jar is 400cm3

Ans 25:

Class : Class 6
As air can be compressed and takes up the volume of container, its final volume in the jar will be 400 cm3.

Ans 26:

Class : Class 4
Sof pls give us a GOOD explanation. Ans is d.

Ans 27:

Class : Class 5
plz dont be angry. The volume of the glass jar will not change. it will remain the same as it is not flexible. so if we compress air of 50cm3 the volume will decrease. But air occupies the available space. So, the correct answer is C.

Ans 28:

Class : Class 7
d

Ans 29:

Class : Class 6
C

Ans 30:

Class : Class 5
I thought it would be C but after profound thinking I realised that the answer would be D

Ans 31:

Class : Class 7

Ans 32:

Class : Class 8
Ans is c

Ans 33:

Class : Class 9
Correct answer is C because air can be compressed. You don't need to add 400 and 50 because air can be compressed

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Both B and C are right so please don’t quarrel

Ans 2:

Class : Class 5
ANSWER is c as many people don't see that the container already had 30 ml of water

Ans 3: (Master Answer)

Class : Class 1

Ans 4:

Class : Class 6
When Y is put it looks like it rose from 50 to 70.

Ans 5:

Class : Class 6
When you put R on the surface you will find that it does not weigh more than 30 units.

Ans 6:

Class : Class 4
x=20 and y= 25 read the last line of the question and you will find out

Ans 7:

Class : Class 4
I q

Ans 8:

Class : Class 8
B is 25ml which is less than 30 ml ... B is the answer

Ans 9:

Class : Class 10
Yajat is correct because if you read the question carefully , it is written '30 ml of watter' which means that it was already filled with 30 ml of water. now x=50-30=20cm3 and y =75 - 50 = 25 mlSo correct option is c.

Ans 10:

Class : Class 9
yes dear B and C are correct SOF is wrong my dear kids please dont fight

Ans 11:

Class : Class 7
x is put in a vase of 30 ml water . then it becomes 50 ml . so , volume of x is 50 - 30 i.e. 20 ml . then after adding y , it becomes 75 ml . then , y is 75 - 50 i.e. 25 ml . both are less than 30 ml . so , the correct answer is C . understood ?

Ans 12:

Class : Class 7
B

Ans 13:

Class : Class 10
DEFINITELY IT IS B

Ans 14:

Class : Class 8
option c is wrong only y has 25ml volume and x has 50ml , z also has 50 ml of volume so , option b is correct

Ans 15:

Class : Class 7
B is the correct answer.

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