Question

Class - IX
Sub Science
ne: 3hrs, F.M - 100, P.M - 40.
1. Choose the correct answer from the given option.
i) 100°c when converted into Kelvin seal it is
a) 273K
b) - 273K
c) 373K
d) 100K
11) Which one indicate chemical changes?
a) Rusting of Almirah
c) Dissolving common salt
b) Cutting of trees
d) Melting of butter
iii) The Avogadro number is -
a) 6'022 x 10-23
b) 6'022 X 1011
c) 6'022 X 10-11
d) 6'022 x 1023
iv) If an object travels a distance 'S' in time 'T' then its speed V' is -
b) V =
c) V = st
d) None
v) Momentum of an object of mass 2kg moving with a velocity 5 m/s is -
a) 25kg/s
b) 10kg/s
c) 25N
d) ION
a) V =
S​

Answer 1

Answer:

1. c) 373k

2. a) rusting of almirah

3. d) 6.022 × 10²³

4 .V=s/t

5. b) 10 kg/s

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