1
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following options are correct for the reaction

$$2\left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s}) \rightarrow 2 \mathrm{Au}(\mathrm{s})+\left[\mathrm{Zn}(\mathrm{CN})_{4}\right]^{2-}(\mathrm{aq})$$

A. Redox reaction

B. Displacement reaction

C. Decomposition reaction

D. Combination reaction

Choose the correct answer from the options given below:

A
A and B only
B
C and D only
C
A only
D
A and D only
2
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

For a concentrated solution of a weak electrolyte ($$\mathrm{K}_{\text {eq }}=$$ equilibrium constant) $$\mathrm{A}_{2} \mathrm{B}_{3}$$ of concentration '$$c$$', the degree of dissociation '$$\alpha$$' is :

A
$$\left(\frac{K_{e q}}{25 c^{2}}\right)^{\frac{1}{5}}$$
B
$$\left(\frac{K_{e q}}{108 c^{4}}\right)^{\frac{1}{5}}$$
C
$$\left(\frac{K_{e q}}{5 c^{4}}\right)^{\frac{1}{5}}$$
D
$$\left(\frac{K_{e q}}{6 c^{5}}\right)^{\frac{1}{5}}$$
3
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

LIST I
Oxide
LIST II
Type of bond
A. $$\mathrm{N_2O_4}$$ I. 1 N = O bond
B. $$\mathrm{NO_2}$$ II. 1 N $$-$$ O $$-$$ N bond
C. $$\mathrm{N_2O_5}$$ III. 1 N $$-$$ N bond
D. $$\mathrm{N_2O}$$ IV. 1 N=N / N $$\equiv$$ N bond

Choose the correct answer from the options given below:

A
A-II, B-I, C-III, D-IV
B
A-III, B-I, C-II, D-IV
C
A-III, B-I, C-IV, D-II
D
A-II, B-IV, C-III, D-I
4
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The difference between electron gain enthalpies will be maximum between :

A
Ar and Cl
B
Ne and Cl
C
Ne and F
D
Ar and F
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