NTA JEE Main 25th July 2022 Shift 1

Among the following species $$N_2, N_2^+, N_2^-, N_2^{2-}, O_2, O_2^+, O_2^-, O_2^{2-}$$, the number of species showing diamagnetism is ______.

The pressure of a moist gas at $$27°C$$ is $$4 \text{ atm}$$. The volume of the container is doubled at the same temperature. The new pressure of the moist gas is ______ $$\times 10^{-1}$$ atm. (Nearest integer)
(Given: The vapour pressure of water at $$27°C$$ is $$0.4 \text{ atm}$$)

The enthalpy of combustion of propane, graphite and dihydrogen at $$298 \text{ K}$$ are: $$-2220.0 \text{ kJ mol}^{-1}$$, $$-393.5 \text{ kJ mol}^{-1}$$ and $$-285.8 \text{ kJ mol}^{-1}$$ respectively. The magnitude of enthalpy of formation of propane ($$C_3H_8$$) is ______ $$\text{kJ mol}^{-1}$$. (Nearest integer)

While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from $$0.25 \text{ g}$$ of the compound neutralized $$2.5 \text{ mL}$$ of $$2M \text{ } H_2SO_4$$. The percentage of nitrogen present in organic compound is ______.

The number of $$sp^3$$ hybridised carbons in an acyclic neutral compound with molecular formula $$C_4H_5N$$ is ______.

The cell potential for $$Zn | Zn^{2+}(aq) || Sn^{x+} | Sn$$ is $$0.801 \text{ V}$$ at $$298 \text{ K}$$. The reaction quotient for the above reaction is $$10^{-2}$$. The number of electrons involved in the given electrochemical cell reaction is ______.
(Given $$E^0_{Zn^{2+}|Zn} = -0.763 \text{ V}$$, $$E^0_{Sn^{x+}|Sn} = +0.008 \text{ V}$$ and $$\dfrac{2.303RT}{F} = 0.06 \text{ V}$$)

The half life for the decomposition of gaseous compound A is $$240 \text{ s}$$ when the gaseous pressure was $$500 \text{ Torr}$$ initially. When the pressure was $$250 \text{ Torr}$$, the half life was found to be $$4.0 \text{ min}$$. The order of the reaction is ______ (Nearest integer).

Among $$Co^{3+}$$, $$Ti^{2+}$$, $$V^{2+}$$ and $$Cr^{2+}$$ ions, one if used as a reagent cannot liberate $$H_2$$ from dilute mineral acid solution, its spin-only magnetic moment in gaseous state is ______ B.M. (Nearest integer)

Consider the following metal complexes:
$$[Co(NH_3)]^{3+}$$
$$[CoCl(NH_3)_5]^{2+}$$
$$[Co(CN)_6]^{3-}$$
$$[Co(NH_3)_5(H_2O)]^{3+}$$
The spin-only magnetic moment value of the complex that absorbs light with shortest wavelength is ______ B.M. (Nearest integer)

In the given reaction

(Where Et is $$-C_2H_5$$)
The number of chiral carbon(s) in product A is ______.