1
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The equilibrium constant for the reaction

N2(g) + O2(g) $$\rightleftharpoons$$ 2NO(g) is 4 $$\times$$ 10$$-$$4 at 2000 K. In presence of a catalyst the equilibrium is attained 10 times faster. Therefore, the equilibrium constant, in presence of the catalyst at 2000 K is
A
4 $$\times$$ 10$$-$$4
B
4 $$\times$$ 10$$-$$3
C
4 $$\times$$ 10$$-$$5
D
2.5 $$\times$$ 10$$-$$4
2
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Under the same reaction conditions, initial concentration of 1.386 mol dm$$-$$3 of a substance becomes half in 40 s and 20 s through first-order and zero-order kinetics respectively. Ratio $$\left( {{{{k_1}} \over {{k_0}}}} \right)$$ of the rate constants for first-order (k1) and zero-order (k0) of the reactions is
A
0.5 mol$$-$$1 dm3
B
0.5 mol dm$$-$$3
C
1.0 mol dm3
D
2.0 mol$$-$$1 dm3
3
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Which of the following solutions will have highest conductivity?
A
0.1 M CH3COOH
B
0.1 M NaCl
C
0.1 M KNO3
D
0.1 M HCl
4
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Indicate the products (X) and (Y) in the following reactions

Na2S + nS(n = 1 $$-$$ 8) $$\to$$ (X)

Na2SO3 + S $$\to$$ (Y)
A
(X) (Y)
$$N{a_2}{S_2}{O_3}$$ $$N{a_2}{S_2}$$
B
(X) (Y)
$$N{a_2}{S_{(n + 1)}}$$ $$N{a_2}{S_2}{O_3}$$
C
(X) (Y)
$$N{a_2}{S_n}$$ $$N{a_2}{S_2}{O_3}$$
D
(X) (Y)
$$N{a_2}{S_5}$$ $$N{a_2}{S_2}{O_4}$$
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