NEET Practice Questions (MCQs) with Answers & Solutions

Major products A and B formed in the following reaction sequence are:

2-methyl-1-cyclohexanol (i.e. 1-methylcyclohexanol — OH and CH₃ on the same ring carbon)

$\xrightarrow{PBr_3}$ A (major) $\xrightarrow[\Delta]{alc.\ KOH}$ B (major)

Identify the correct answer.

The work done during reversible isothermal expansion of one mole of hydrogen gas at $25^\circ C$ from pressure of 20 atmosphere to 10 atmosphere is:

(Given $R = 2.0\ cal\ K^{-1}\ mol^{-1}$)

Consider the following reaction in a sealed vessel at equilibrium with concentrations of $N_2 = 3.0\times 10^{-3}\,M$, $O_2 = 4.2\times 10^{-3}\,M$ and $NO = 2.8\times 10^{-3}\,M$.

$2\,NO_{(g)} \rightleftharpoons N_2{}_{(g)} + O_2{}_{(g)}$

If $0.1\,\text{mol L}^{-1}$ of $NO_{(g)}$ is taken in a closed vessel, what will be degree of dissociation ($\alpha$) of $NO_{(g)}$ at equilibrium?

For the given reaction: Ph–CH=CH–Ph $\xrightarrow{KMnO_4/H^+}$ 'P' (major product). 'P' is:

The pair of lanthanoid ions which are diamagnetic is

The products A and B obtained in the following reactions, respectively, are:

$3\,ROH + PCl_3 \to 3\,RCl + A$

$ROH + PCl_5 \to RCl + HCl + B$

Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI.

A. $Al^{3+}$ B. $Cu^{2+}$ C. $Ba^{2+}$ D. $Co^{2+}$ E. $Mg^{2+}$

Choose the correct answer from the options given below:

Given below are two statements:

Statement I: $[\text{Co(NH}_3)_6]^{3+}$ is a homoleptic complex whereas $[\text{Co(NH}_3)_4\text{Cl}_2]^+$ is a heteroleptic complex.

Statement II: Complex $[\text{Co(NH}_3)_6]^{3+}$ has only one kind of ligands but $[\text{Co(NH}_3)_4\text{Cl}_2]^+$ has more than one kind of ligands.

In the light of the above statements, choose the correct answer from the options given below:

A compound X contains 32% of A, 20% of B and remaining percentage of C. Then, the empirical formula of X is:

(Given atomic masses of $A = 64$; $B = 40$; $C = 32$ u)