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What is the product formed in the below reaction? (Note: Reactant structure is missing) + $NaNO_2 + HCl \longrightarrow$ Product

The structure of C in the below-mentioned reaction is: (Note: Reaction scheme is missing from the provided text)

If n = 6, the correct sequence for the filling of electrons will be:

The energy of electron in the ground state ($n=1$) for $He^+$ ion is $-x$ J, then that for an electron in $n=2$ state for $Be^{3+}$ ion in J is:

In which of the following molecule, the internuclear distance will be maximum:

Given below are two statements: Statement I: The energy of the He⁺ ion in n=2 state is same as the energy of H atom in n=1 state. Statement II: It is possible to determine simultaneously the exact position and exact momentum of an electron in H atom. In light of the above statements, choose the correct answer from the options given below:

If an atom has electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2$, we will place it in group number:

$$RMgX + CO_2 \xrightarrow{\text{dry ether}} Y \xrightarrow{H_3O^+} RCOOH$$ What is Y in the above reaction?

What is the simplest formula of the ionic compound formed when magnesium reacts with an element X whose ground state electronic configuration is $1s^2 2s^2 2p^3$?

Identify the correct order of the size of the following species: $Ca^{2+}, K^+, Ar, S^{2-}, Cl^-$

Which one of the following orders is not in accordance with the property stated against?

The correct order of decreasing second ionization enthalpy of Ti(22), V(23), Cr(24) and Mn(25) is:

The molar conductance of M/32 solution of a weak monobasic acid is $8.0 \text{ ohm}^{-1} \text{ cm}^2$ and at infinite dilution is $400 \text{ ohm}^{-1} \text{ cm}^2$. The dissociation constant of this acid is:

The molar conductivity of a solution of $\text{AgNO}_3$ at $298 \text{ K}$ (considering the given data: concentration $= 0.5 \text{ mol/dm}^3$, electrolytic conductivity $= 5.76 \times 10^{-3} \text{ S cm}^{-1}$) is:

Which one of the following compounds is a peroxide?

The formation of the oxide ion O²⁻(g) from oxygen atom requires first an exothermic and then an endothermic step as shown below: O(g) + e⁻ → O⁻(g); ΔH° = -141 kJ mol⁻¹ O⁻(g) + e⁻ → O²⁻(g); ΔH° = +780 kJ mol⁻¹ Thus, the process of formation of O²⁻ in gas phase is unfavourable even though O²⁻ is isoelectronic with neon. It is due to the fact that:

The correct order of the decreasing ionic radii among the following isoelectronic species is:

Identify the wrong statement in the following:

Which one of the following arrangements does not give the correct picture of the trends indicated against it?

Which of the following is the most basic oxide?