NTA JEE Main 10th April 2023 Shift 2

The electron in the n$$^{th}$$ orbit of Li$$^{2+}$$ is excited to (n+1) orbit using the radiation of energy $$1.47 \times 10^{-17}$$ J (as shown in the diagram). The value of n is _______ Given: $$R_H = 2.18 \times 10^{-18}$$ J

For a metal ion, the calculated magnetic moment is 4.90 BM. This metal ion has _______ number of unpaired electrons

The number of molecules from the following which contain only two lone pair of electrons is _______
H$$_2$$O, N$$_2$$, CO, XeF$$_4$$, NH$$_3$$, NO, CO$$_2$$, F$$_2$$

$$A(g) \rightleftharpoons 2B(g) + C(g)$$
For the given reaction, if the initial pressure is 450 mmHg and the pressure at time t is 720 mmHg at a constant temperature T and constant volume V. The fraction of A(g) decomposed under these conditions is $$x \times 10^{-1}$$. The value of x is (nearest integer) _______

The number of endothermic process/es from the following is _______.
A. $$I_2(g) \to 2I(g)$$
B. $$HCl(g) \to H(g) + Cl(g)$$
C. $$H_2O(l) \to H_2O(g)$$
D. $$C(s) + O_2(g) \to CO_2(g)$$
E. Dissolution of ammonium chloride in water

In alkaline medium, the reduction of permanganate anion involves a gain of _______ electrons.

An aqueous solution of volume 300 cm$$^3$$ contains 0.63 g of protein. The osmotic pressure of the solution at 300 K is 1.29 mbar. The molar mass of the protein is _______ g mol$$^{-1}$$.
Given: R = 0.083 L bar K$$^{-1}$$ mol$$^{-1}$$

The specific conductance of 0.0025M acetic acid is $$5 \times 10^{-5}$$ S cm$$^{-1}$$ at a certain temperature. The dissociation constant of acetic acid is _______ $$\times 10^{-7}$$. (Nearest integer)
Consider limiting molar conductivity of CH$$_3$$COOH as 400 S cm$$^2$$ mol$$^{-1}$$

The number of incorrect statement/s from the following is _______
A. The successive half lives of zero order reactions decreases with time.
B. A substance appearing as reactant in the chemical equation may not affect the rate of reaction
C. Order and molecularity of a chemical reaction can be a fractional number
D. The rate constant units of zero and second order reaction are mol L$$^{-1}$$ s$$^{-1}$$ and mol$$^{-1}$$ L s$$^{-1}$$ respectively

The difference in the oxidation state of Xe between the oxidised product of Xe formed on complete hydrolysis of XeF$$_4$$ and XeF$$_4$$ is _______