CHEMISTRY IITJEE, AIPMT test-physical chemistry

The rate of a chemical reaction depends upon ____.
Time
Pressure
Concentration
All of the above
When the concentration of A in the reaction  is doubled, the rate of reaction is ____.
Doubled
Decreased by half
Unchanged
Increased by four times
Which reaction characteristics are changing by the addition of a catalyst to a reaction at constant temperature : (i) Activation energy (ii) Equilibrium constant (iii) Reaction entropy (iv)Reaction enthalpy
(i) Only
(iii) only
(i) and I(ii) only
All of the above
Time required for completion of ionic reactions in comparison to molecular reactions is ____.
Maximum
Minimum
Equal
None
For the reaction system  volume is suddenly produced to half its value by increasing the pressure on it. If the reaction is of first order with respect to  and second order with respect to, the rate of reaction will ____.
Diminish to one fourth of its initial value
Diminish to one eighth of its initial value
Increase to eight times of its initial value
Increase to four times of its initial value
In the first order reaction, the concentration of the reactant is reduced to 25% in one hour. The half life period of the reaction is ____.
2 hr
4 hr
1/2 hr
1/4 hr
Decay of 92U235 is ____ order reaction.
Zero
First
Second
Third
Which of the following reactions end in finite time?
0 order
1st order
2nd order
3rd order
For N2 + 3H2 ( 2NH3 + 22 kcal, Ea (energy of activation) is 70 kcal. Hence, Ea of 2NH3 ( N2 + 3H2 is:
92 kcal
70 kcal
-70 kcal
-92 kcal
Specific heat of aluminium is 0.214 cal/goC. Heat required to raise the temperature of 40.0 g of AI from 20o to 30oC is:
85.6 cal
3.2 cal
171.2 cal
342.4 cal
Based on the values of BE given,  of N2H4(g) is: N (N 159 kJ mol-1 H(N 436 kJ mol-1 N=N 418 kJ mol-1 H(N 389 kJ mol-1 N( N 941 kJ mol-1
+711kJ mol-1
+98 kJ mol-1
-98 kJ mol-1
-711 kJ mol-1
Born-Haber cycle has some of the following facts: I: It is used to determine lattice energy II: It is used to determine election affinity III: It is based on Hess’s law of constant heat summation IV: It is used to determine heat of formation of hydrocarbons. Correct facts are:
I, II,III
II, III, IV
I, II
I, II, III, IV
What is the value of the reaction quotient, Q for the cell? Ni(s)|Ni(NO3)2(0.190M)||KCI(0.40M) CI(g,1.0 atm)|Pt(s)
3.1x 10-1
1.3x 10-1
8.0x 10-2
3.0x 10-2
Which of following is/are function (s) salf-bridge?
It completes the electrical circuit with electrons flowing from one electrode to other through external wires and a flow of ions between the two compartments through salt-bridge
It prevents the accumulation of the ions
Both correct
None of the above

-0.32 V
+ 0.32 V
+ 1.20 V
– 1.20 V
Description:

mcq based

Discussion

bishnu gariagadu

good questions

4152 days 24 minutes ago

DIPANKAR DAS
Experienced chemistry teacher for JEE(M &A) , WBJEE, NEET,ALL BOARDS
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