1
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

The equivalent conductance of NaCl, HCl and CH$$_3$$COONa at infinite dilution are 126.45, 426.16 and 91 ohm$$^{-1}$$cm$$^2$$eq$$^{-1}$$ respectively at 25$$^\circ$$C. The equivalent conductance of acetic acid (at infinite dilution) would be

A
461.61 ohm$$^{-1}$$cm$$^2$$eq$$^{-1}$$
B
390.71 ohm$$^{-1}$$cm$$^2$$eq$$^{-1}$$
C
cannot be determined from the given data.
D
208.71 ohm$$^{-1}$$cm$$^2$$eq$$^{-1}$$
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

For the reaction A + B $$\to$$ C, we have the following data:

Initial concentration of A (in molarity) Initial concentration of B (in molarity) Rate (initial)
(Relevant unit)
1 10 100
1 1 1
10 1 10

The order of the reaction with respect to A and B are

A
Not possible to tell with the given data.
B
First order with respect to both A and B.
C
First order with respect to A and second order with respect to B.
D
Second order with respect to A and first order with respect to B.
3
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

If in case of a radio isotope the value of half-life (T$$_{1/2}$$) and decay constant ($$\lambda$$) are identical in magnitude, then their value should be

A
0.693/2
B
(0.693)$$^{1/2}$$
C
(0.693)$$^2$$
D
0.693
4
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Suppose a gaseous mixture of He, Ne, Ar and Kr is treated with photons of the frequency appropriate to ionize Ar. What ion(s) will be present in the mixture?

A
Ar$$^+$$
B
Ar$$^+$$ + Kr$$^+$$
C
Ar$$^+$$ + He$$^+$$ + Ne$$^+$$
D
He$$^+$$ + Ar$$^+$$ + Kr$$^+$$
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