1
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
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Which of the following statements is true about equilibrium constant and rate constant of a single step chemical reaction?

A
Equilibrium constant may increase or decrease but rate constant always increases with temperature.
B
Both equilibrium constant and rate constant increase with temperature.
C
Rate constant may increase or decrease but equilibrium constant always increases with temperature.
D
Both equilibrium constant and rate constant decrease with temperature.
2
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
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After the emission of a $$\beta$$-particle followed by an $$\alpha$$-particle from $${ }_{83}^{214} \mathrm{Bi}$$, the number of neutrons in the atom is -

A
210
B
128
C
129
D
82
3
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
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Which hydrogen like species will have the same radius as that of $$1^{\text {st }}$$ Bohr orbit of hydrogen atom?

A
$$ \mathrm{n}=2, \mathrm{Li}^{2+} $$
B
$$ \mathrm{n}=2, \mathrm{Be}^{3+} $$
C
$$ \mathrm{n}=2, \mathrm{He}^{+} $$
D
$$ \mathrm{n}=3, \mathrm{Li}^{2+} $$
4
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

For a first order reaction with rate constant $$\mathrm{k}$$, the slope of the plot of $$\log$$ (reactant concentration) against time is

A
k/2.303
B
k
C
$$-$$k/2.303
D
$$-$$k
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