NTA JEE Main 15th April 2023 Shift 1

The total number of isoelectronic species from the given set is _____.
O$$^{2-}$$, F$$^-$$, Al, Mg$$^{2+}$$, Na$$^+$$, O$$^+$$, Mg, Al$$^{3+}$$, F

$$30.4$$ kJ of heat is required to melt one mole of sodium chloride and the entropy change at the melting point is $$28.4$$ J K$$^{-1}$$ mol$$^{-1}$$ at 1 atm. The melting point of sodium chloride is _____ K (Nearest Integer)

The total change in the oxidation state of manganese involved in the reaction of KMnO$$_4$$ and potassium iodide in the acidic medium is _____.

The vapour pressure of $$30\%$$ (w/v), aqueous solution of glucose is _____ mm Hg at $$25°$$C.
[Given: The density of 30% (w/v), aqueous solution of glucose is $$1.2$$ g cm$$^{-3}$$ and vapour pressure of pure water is $$24$$ mm Hg.]
(Molar mass of glucose is 180 g mol$$^{-1}$$)

The number of correct statements from the following is _____
(A) Conductivity always decreases with decrease in concentration for both strong and weak electrolytes.
(B) The number of ions per unit volume that carry current in a solution increases on dilution.
(C) Molar conductivity increases with decrease in concentration.
(D) The variation in molar conductivity is different for strong and weak electrolytes.
(E) For weak electrolytes, the change in molar conductivity with dilution is due to decrease in degree of dissociation.

For a reversible reaction A $$\rightleftharpoons$$ B, the $$\Delta H$$ forward reaction $$= 20$$ kJ mol$$^{-1}$$. The activation energy of the uncatalyzed forward reaction is $$300$$ kJ mol$$^{-1}$$. When the reaction is catalysed keeping the reactant concentration same, the rate of the catalysed forward reaction at $$27°$$C is found to be same as that of the uncatalyzed reaction at $$327°$$C. The activation energy of the catalysed backward reaction is _____ kJ mol$$^{-1}$$.

$$20$$ mL of $$0.5$$ M NaCl is required to coagulate $$200$$ mL of As$$_2$$S$$_3$$ solution in 2 hours. The coagulating value of NaCl is _____.

In Chromyl chloride, the oxidation state of chromium is $$(+)$$ _____.

The volume (in mL) of $$0.1$$ M AgNO$$_3$$ required for complete precipitation of chloride ions present in $$20$$ mL of $$0.01$$ M solution of [Cr(H$$_2$$O)$$_5$$Cl]Cl$$_2$$ as silver chloride is _____.

The homoleptic and octahedral complex of Co$$^{2+}$$ and H$$_2$$O has _____ unpaired electron(s) in the t$$_{2g}$$ set of orbitals.