NTA JEE Main 28th July 2022 Shift 1

In the given reaction, $$X + Y + 3Z \rightleftharpoons XYZ_3$$. If one mole of each of X and Y with 0.05 mol of Z gives compound $$XYZ_3$$. (Given: Atomic masses of X, Y and Z are 10, 20 and 30 amu, respectively). The yield of $$XYZ_3$$ is _____ g.

On complete combustion of 0.492 g of an organic compound containing C, H and O, 0.7938 g of $$CO_2$$ and 0.4428 g of $$H_2O$$ was produced. The % composition of oxygen in the compound is _____ (Nearest Integer)

The number of paramagnetic species among the following is $$B_2, Li_2, C_2, C_2^-, O_2^{2-}, O_2^+$$ and $$He_2^+$$

$$K_a$$ for butyric acid ($$C_3H_7COOH$$) is $$2 \times 10^{-5}$$. The pH of 0.2 M solution of butyric acid is _____ $$\times 10^{-1}$$. (Nearest integer) [Given $$\log 2 = 0.30$$]

An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm. The density of the element is 6.0 g cm$$^{-3}$$. The number of atoms present in 180 g of the element is _____ $$\times 10^{23}$$. (Nearest integer)

150 g of acetic acid was contaminated with 10.2 g ascorbic acid $$(C_6H_8O_6)$$ to lower down its freezing point by $$x \times 10^{-1}$$ °C. The value of $$x$$ is _____ (Nearest integer). [Given $$K_f = 3.9$$ K kg mol$$^{-1}$$; Molar mass of ascorbic acid = 176 g mol$$^{-1}$$]

For the given first order reaction $$A \to B$$ the half life of the reaction is 0.3010 min. The ratio of the initial concentration of reactant to the concentration of reactant at time 2.0 min will be equal to _____. (Nearest integer)

The number of inter halogens from the following having square pyramidal structure is
$$ClF_3, IF_7, BrF_5, BrF_3, I_2Cl_6, IF_5, ClF, ClF_5$$

The disproportionation of $$MnO_4^{2-}$$ in acidic medium resulted in the formation of two manganese compounds A and B. If the oxidation state of Mn in B is smaller than that of A, then the spin-only magnetic moment $$\mu$$ value of B in BM is _____ (Nearest integer)

Total number of relatively more stable isomer(s) possible for octahedral complex $$[Cu(en)_2(SCN)_2]$$ will be _____