.Question 6 : Powdered marble reacts more rapidly with HCl than the chips of marble because:
Surface area of powdered marble is more that of chips of marble and hence there is more collisions between the molecules of reactants
Number of molecules increases.
Energy of activation decreases
Marble chips will not react with HCl
Question 7 : In the reaction:
2
B
→
P
r
o
d
u
c
t
2B→Product
; the rate equation is: Rate = k[B]. If the concentration of ‘B’ is doubled, the rate of reaction will increase by a multiple of
Four
Three
None of these
Two
Question 8 : For a reaction:
2
H
2
+
2
N
O
→
2
H
2
O
+
N
2
2H2+2NO→2H2O+N2
the rate law is
R
=
K
[
H
2
]
[
N
O
]
2
R=K[H2][NO]2
The Order of the reaction is?
2
3
0
1
1
Expert's answer
2017-04-07T01:41:07-0400
Question 6: The correct answer: Surface area of powdered marble is more that of chips of marble and hence there is more collisions between the molecules of reactants.
Question 7: R = k[B][B]. So the correct answer: Four.
Question 8: The order of reaction for a given substance is the exponent at the concentration of this substance in the kinetic equation of the reaction. Kinetic equation of the reaction: R = k [NO] 2 [H 2 ] The general order is: 2 + 1 = 3. So the correct answer: 3.
Answer: Question 6: Surface area of powdered marble is more that of chips of marble and hence there is more collisions between the molecules of reactants; Question 7: Four; Question 8: 3.
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