List of top Chemistry Questions

Match the reactions (in the given stoichiometry of the reactants) in List-I with one of their products given in List-II and choose the correct option.

	List-I		List-II
(P)	P₂O₃ + 3H₂O →	(1)	P(O)(OCH₃)Cl₂
(Q)	P₄ + 3NaOH + 3H₂O →	(2)	H₃PO₃
(R)	PCl₅ + CH₃COOH →	(3)	PH₃
(S)	H₃PO₂ + 2H₂O + 4AgNO₃ →	(4)	POCl₃
		(5)	H₃PO₄

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with List-II and choose the correct option.

In the following reactions, P, Q, R, and S are the major products.

The correct statement(s) about P, Q, R, and S is(are)

One mole of an ideal monoatomic gas undergoes two reversible processes ($A → B$ and $B → C$) as shown in the given figure:

$A → B$ is an adiabatic process. If the total heat absorbed in the entire process ($A → B$ and $B → C$) is $R𝑇_2\ ln\ 10$, the value of $2 log\ 𝑉_3$ is ___ . [Use, molar heat capacity of the gas at constant pressure, $𝐶_{p,m} = \frac 52R$]

In the scheme given below, X and Y, respectively, are

Plotting $\frac{1}{Λ_{m}}$against $cΛ_{m}$ for aqueous solutions of a monobasic weak acid (HX) resulted in a straight line with y-axis intercept of P and slope of S. The ratio $\frac{P}{S}$ is
[$Λ_{m}$ = molar conductivity,
$Λ^{o}_{m}$= limiting molar conductivity,
$c$ = molar concentration,
$K_{a}$ = dissociation constant of HX]

In a one-litre flask, 6 moles of A undergoes the reaction A (g) ⇌ P (g). The progress of product formation at two temperatures (in Kelvin), T₁ and T₂, is shown in the figure:

If T₁ = 2T₂ and (∆G₂^Θ − ∆G₁^Θ) = RT₂ ln x, then the value of x is ___ . [∆G₁^Θ and ∆G₂^Θ are standard Gibb’s free energy change for the reaction at temperatures T₁ and T₂, respectively.]

Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the correct option.
[Atomic Number: Fe = 26, Mn = 25, Co = 27]

	List-I		List-II
(P)	$t^6_{2g} e^0_g$	(1)	$ [Fe(H_2O)_6]^{2+}$
(Q)	$t^3_{2g} e^2_g$	(2)	$ [Mn(H_2O)_6]^{2+}$
(R)	$e^2t^3_{2}$	(3)	$ [Co(NH_3)_6]^{3+}$
(S)	$t^4_{2g} e^2_g$	(4)	$[FeCl_4]^-$
		(5)	$ [CoCl_4]^{2-}$

Two solutions $A$ and $B$ are prepared by dissolving $1 g$ of non-volatile solutes $X$ and $Y$ respectively in $1 \,kg$ of water The ratio of depression in freezing points for $A$ and $B$ is found to be $1: 4$ The ratio of molar masses of $X$ and $Y$ is :

The correct statement(s) related to processes involved in the extraction of metals is(are)

	List-I		List-II
(P)	\(t^6_{2g} e^0_g\)	(1)	\( [Fe(H_2O)_6]^{2+}\)
(Q)	\(t^3_{2g} e^2_g\)	(2)	\( [Mn(H_2O)_6]^{2+}\)
(R)	\(e^2t^3_{2}\)	(3)	\( [Co(NH_3)_6]^{3+}\)
(S)	\(t^4_{2g} e^2_g\)	(4)	\([FeCl_4]^-\)
		(5)	\( [CoCl_4]^{2-}\)