National Science Olympiad Forum By SOF Olympiad Trainer - Page 94

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Subject :NSO    Class : Class 10

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Subject :NSO    Class : Class 1

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 6

Study the given classification chart and select the correct option.

    
              a                  b             c               d

ANylon         Cotton       Silk          Wool
BFlax            Silk           Cotton       Wool
CCotton         Flax          Wool         Silk
DCotton         Jute           Silk           Wool


jute is obtained from bark......

Ans 1:

Class : Class 6
(C) Cotton Flax Wool Silk

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Subject :NSO    Class : Class 9

The given figure shows the set-up to study the reaction between gas X and copper (II) oxide :

Which of the following statements are correct?
[Given : Atomic mass of N = 14 u, H = 1 u, O = 16 u, C = 12 u]
I. Gas X is a compound of two elements, nitrogen and hydrogen.
II. The number of atoms present in 11.2 L of N2 is 6.023 × 1023.
III. 1 mole of H2O contains 1 mole of oxygen molecules and 2 moles of hydrogen atoms.
IV. N2 gas being soluble in water is collected by upward displacement of water.

AI and II only
BI and III only
CII and IV only
DIII and IV only


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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 4
a

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 3
D

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 5

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