National Science Olympiad Forum By SOF Olympiad Trainer - Page 330

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
ans D is the correct answer as silver turns black after reaction to hydrogen sulphide

Ans 2:

Class : Class 8
Silver can also react with SO2, sulphur dioxide, to tarnish.

Ans 3:

Class : Class 8

Ans 4:

Class : Class 7
Silver turns black, not green. And also silver does not react with water. So, obviously D is the answer.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8
20 mL multiplied by 10 equals 200 ml.. likewise, multiply 1 min by 10. the answer is 10 minutes or 600 seconds.

Ans 3:

Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
d is the answer

Ans 2:

Class : Class 8
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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
a b c d

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 9

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