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Tulsi Mehta
Subject: Chemistry
, asked on 21/4/18
The half-life of first order decomposition of NH4NO3 is 2.1 hr at 15C temperature.
NH4NO2(aq) --> N2O(g) + 2H2O(l).
if 6.2 g of NH4NO2 is allowed to decompose calculate
1)The time required for NH4NO3 to decompose 99%
2)the volume of dry N2O produced at this point measured at STP
Answer
1
Tulsi Mehta
Subject: Chemistry
, asked on 21/4/18
for a homogeneous gas phase reaction 2a--> 3b +c initial pressure of reactant was p0 while pressure at time t was p. find pressure after time 2t. assume first order reaction
Answer
1
Tulsi Mehta
Subject: Chemistry
, asked on 21/4/18
Q. Nitrogen pentoxide decomposes according to equation:
2
N
2
O
5
g
→
4
N
O
2
(
g
)
+
O
2
g
; the first order reaction was allowed to proceed at 40
°
C and the data below were collected :
[
N
2
O
5
]/M
Time/min
0.400
0.00
0.289
20.00
0.209
40.00
0.151
60.00
0.109
80.00
Calculate the initial rate of reaction.
Answer
1
Aparna Sahu
Subject: Chemistry
, asked on 20/4/18
Solve this:
28. For a first order reaction A
→
P, the temperature (T) dependant rate constant (k) was found the follow the
logk
=
2000
1
T
+
6
.
0
The pre-exponential factor is.
(a) 6s
-1
(b) 2 x 10
6
S
-1
(c) 3 x 10
6
S
-1
(d) 1 x 10
6
S
-1
Answer
1
Muhammad Arafath R Z
Subject: Chemistry
, asked on 18/4/18
Equilibrium online mains 2018
Q.17. At a certain temperature in a 5 L vessel, 2 moles of carbon monoxide and 3 moles of chlorine were allowed to reach equilibrium according to the reaction,
C
O
+
C
l
2
⇌
C
O
C
l
2
At equilibrium, if one mole of CO is present then equilibrium constant (
K
C
) for the reaction is :
1. 3
2. 2.5
3. 2
4. 4
Answer
1
Muhammad Arafath R Z
Subject: Chemistry
, asked on 18/4/18
CHEM kinetics Online 2018
Q.9. For a first order reaction,
A
→
P
,
t
1
2
(half- life) is 10 days. The time required for
1
t
h
4
conversion of A (in days) is :
(ln 2 = 0.693, ln 3 = 1.1)
1. 2.5
2. 4.1
3. 5
4. 3.2
Answer
1
Muhammad Arafath R Z
Subject: Chemistry
, asked on 18/4/18
Answer this Mains 2018
Q.7. A body takes 10 minutes to cool from 60
°
C to 50
°
C. The temperature of surroundings is constant at 25
°
C. Then, the temperature of the body after next 10 minutes will be approximately :
1. 43
°
C
2. 45
°
C
3. 41
°
C
4. 47
°
C
Answer
1
Mitali
Subject: Chemistry
, asked on 16/4/18
Please solve
Q. An
α
-active radioisotope of He is kept in a sealed container. The mass of the radioisotope in the container is 5 g. The volume of He gas collected in 2 hours is 22.4 mL after disintegration of the radioisotope. What is the half-life of the radioisotope?
A. 3120.3 years
B. 3123.3 years
C. 3460.3 years
D. 3463.3 years
Answer
1
Mitali
Subject: Chemistry
, asked on 16/4/18
Please solve... i took this from laptop the interference pattern is disturbing... kindly co operate..
Answer
1
Mitali
Subject: Chemistry
, asked on 16/4/18
Please solve...
Answer
1
Laieeqa
Subject: Chemistry
, asked on 16/4/18
Solve this:
Q.26. Temperature coefficient of a reaction is '2'. When temperature is increased from 30
°
C to 90
°
C, the rate of reaction is increased by
(1) 60 times
(2) 64 times
(3) 150 times
(4) 400 times
Answer
1
Laieeqa
Subject: Chemistry
, asked on 16/4/18
Solve this:
Q.20. If 50 % of the reactant is converted into a product in a first order reaction in 25 minutes, how much of it would react in 100 minutes ?
(1) 93.75 %
(2) 87.5 %
(3) 75 %
(4) 100 %
Answer
1
Shubhangi Upadhyay
Subject: Chemistry
, asked on 16/4/18
Hoe will you show that for a zero order reaction the substance reacted is dependent on time ?
Answer
1
Tulsi Mehta
Subject: Chemistry
, asked on 14/4/18
Q7
Answer
1
Tulsi Mehta
Subject: Chemistry
, asked on 14/4/18
2c)
Answer
1
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What are you looking for?
NH4NO2(aq) --> N2O(g) + 2H2O(l).
if 6.2 g of NH4NO2 is allowed to decompose calculate
1)The time required for NH4NO3 to decompose 99%
2)the volume of dry N2O produced at this point measured at STP
; the first order reaction was allowed to proceed at 40C and the data below were collected :
Calculate the initial rate of reaction.
28. For a first order reaction AP, the temperature (T) dependant rate constant (k) was found the follow the
The pre-exponential factor is.
(a) 6s-1
(b) 2 x 106 S-1
(c) 3 x 106 S-1
(d) 1 x 106 S-1
Q.17. At a certain temperature in a 5 L vessel, 2 moles of carbon monoxide and 3 moles of chlorine were allowed to reach equilibrium according to the reaction,
At equilibrium, if one mole of CO is present then equilibrium constant () for the reaction is :
1. 3
2. 2.5
3. 2
4. 4
Q.9. For a first order reaction, (half- life) is 10 days. The time required for conversion of A (in days) is :
(ln 2 = 0.693, ln 3 = 1.1)
1. 2.5
2. 4.1
3. 5
4. 3.2
Q.7. A body takes 10 minutes to cool from 60C to 50C. The temperature of surroundings is constant at 25C. Then, the temperature of the body after next 10 minutes will be approximately :
1. 43C
2. 45C
3. 41C
4. 47C
Q. An -active radioisotope of He is kept in a sealed container. The mass of the radioisotope in the container is 5 g. The volume of He gas collected in 2 hours is 22.4 mL after disintegration of the radioisotope. What is the half-life of the radioisotope?
A. 3120.3 years
B. 3123.3 years
C. 3460.3 years
D. 3463.3 years
Q.26. Temperature coefficient of a reaction is '2'. When temperature is increased from 30C to 90C, the rate of reaction is increased by
(1) 60 times
(2) 64 times
(3) 150 times
(4) 400 times
(1) 93.75 %
(2) 87.5 %
(3) 75 %
(4) 100 %