1
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
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What is the edge length of the unit cell of a body centred cubic crystal of an element whose atomic radius is 75 pm?

A
170 pm
B
175 pm
C
178 pm
D
173.2 pm
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
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The root mean square (rms) speed of X$$_2$$ gas is x m/s at a given temperature. When the temperature is doubled, the X$$_2$$ molecules dissociated completely into atoms. The root mean square speed of the sample of gas then becomes (in m/s)

A
x/2
B
x
C
2x
D
4x
3
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
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Which of the following would give a linear plot?

(k is the rate constant of an elementary reaction and T is temp. in absolute scale)

A
k vs T
B
k vs 1/T
C
ln k vs T
D
ln k vs 1/T
4
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
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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$$^{-1}$$
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