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Nucleophilic addition reaction will be most favoured in:

Isotonic solutions have the same:

Consider the following reactions: 1. $R-COOH \xrightarrow{\text{(i) } X} \xrightarrow{\text{(ii) } H_2O/HCl} R-CH_2OH$ 2. $R-CH=CH_2 \xrightarrow{\text{(i) } X} \xrightarrow{\text{(ii) } H_2O/NaOH/H_2O_2} R-CH_2-CH_2-OH$ Identify 'X' in the above reactions:

Predict the order of reactivity of the following four isomers towards $\text{S}_\text{N}2$ reaction. (I) $\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{Cl}$ (II) $\text{CH}_3\text{CH}_2\text{CH}(\text{Cl})\text{CH}_3$ (III) $(\text{CH}_3)_2\text{CHCH}_2\text{Cl}$ (IV) $(\text{CH}_3)_3\text{CCl}$

The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C), and formic acid (D) is:

The method used to remove temporary hardness of water is :

Given below are two statements: Statement I: Primary aliphatic amines react with $HNO_2$ to give unstable diazonium salts. Statement II: Primary aromatic amines react with $HNO_2$ to form diazonium salts which are stable even above $300\text{ K}$. In the light of the above statements, choose the most appropriate answer from the options given below:

Elimination reaction of 2-Bromo-pentane to form pent-2-ene is (a) $\beta$-Elimination reaction (b) Follows Zaitsev rule (c) Dehydrohalogenation reaction (d) Dehydration reaction

Mark the reaction among the following that does not give benzoic acid as the major product:

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:

In a reaction of aniline a coloured product C was obtained. The structure of C would be:

What is the molarity of the saturated solution if the solubility product for a salt of type AB is $4 \times 10^{-8}$?

The compound that does not give an iodoform test is:

Identify the incorrect statement:

The name of the electrophile involved in the below reaction (Reimer-Tiemann reaction) is:

In qualitative analysis, the metals of Group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains $\text{Ag}^+$ and $\text{Pb}^{2+}$ at a concentration of $0.10 \text{ M}$. Aqueous $\text{HCl}$ is added to this solution until the $\text{Cl}^-$ concentration is $0.10 \text{ M}$. What will the concentration of $\text{Ag}^+$ and $\text{Pb}^{2+}$ at equilibrium? ($K_{sp}$ for $\text{AgCl} = 1.8 \times 10^{-10}$, $K_{sp}$ for $\text{PbCl}_2 = 1.7 \times 10^{-5}$)

Which of the following does not give nucleophilic substitution with alcohol?

The correct sequence of increasing radii is:

Ethylbenzene is obtained from phenyl methyl ketone by using:

Which of the following reactions cannot form new carbon-carbon bonds?