Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
The correct statement among the following is:
Consider the reaction: $\text{CH}_3\text{CH}_2\text{CH}_2\text{Br} + \text{NaCN} \rightarrow \text{CH}_3\text{CH}_2\text{CH}_2\text{CN} + \text{NaBr}$ This reaction will be the fastest in
Find the correct sequence of the bond enthalpy of the $\text{C-X}$ bond among the following:
The efficiency of a fuel cell is given by:
Which of the following is the most preferred method for preparing pure alkyl chlorides from alcohols?
The reaction of hydrogen and iodine monochloride is given as: $H_2(g) + 2ICl(g) \rightarrow 2HCl(g) + I_2(g)$. This reaction is of first order with respect to $H_2(g)$ and $ICl(g)$, for which of the following proposed mechanisms: Mechanism A: $H_2(g) + 2ICl(g) \rightarrow 2HCl(g) + I_2(g)$ Mechanism B: $H_2(g) + ICl(g) \rightarrow HCl(g) + HI(g)$; slow $HI(g) + ICl(g) \rightarrow HCl(g) + I_2(g)$; fast
An organic compound A ($\text{C}_4\text{H}_9\text{Cl}$) in reaction with $\text{Na}$/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative. A is:
Which of the following methods is incorrect for the synthesis of alkenes?
The reaction of $\text{C}_6\text{H}_5\text{CH=CHCH}_3$ with $\text{HBr}$ produces:
Consider the reactions: (i) $(\text{CH}_3)_2\text{CHCH}_2\text{Br} \xrightarrow{\text{C}_2\text{H}_5\text{OH}} (\text{CH}_3)_2\text{CHCH}_2\text{OC}_2\text{H}_5 + \text{HBr}$ (ii) $(\text{CH}_3)_2\text{CHCH}_2\text{Br} \xrightarrow{\text{C}_2\text{H}_5\text{O}^-} (\text{CH}_3)_2\text{CHCH}_2\text{OC}_2\text{H}_5 + \text{Br}^-$ The mechanisms of reactions (i) and (ii) are, respectively:
If $E^\circ_{\text{Fe}^{2+}/\text{Fe}} = -0.441 \text{ V}$ and $E^\circ_{\text{Fe}^{3+}/\text{Fe}^{2+}} = 0.771 \text{ V}$, the standard emf of the reaction: $\text{Fe} + 2\text{Fe}^{3+} \rightarrow 3\text{Fe}^{2+}$ will be:
The pH of a $0.01\text{ M}$ NaOH (aq) solution will be:
Among the following, the correct order of acidity is:
A few reactions are given below: (i) $\text{CH}_3\text{CH}_2\text{CH}_2\text{Br} + \text{KOH} \rightarrow \text{CH}_3\text{CH=CH}_2 + \text{KBr} + \text{H}_2\text{O}$ (ii) [Missing] (iii) [Missing] Select the reaction type for the above reactions:
The number of electrons delivered at the cathode during electrolysis by a current of $1 \text{ ampere}$ in $60 \text{ seconds}$ is (charge on electron = $1.60 \times 10^{-19} \text{ C}$):
Buffer solutions have constant acidity and alkalinity because:
$K_c$ and $K_p$ are not equal for a reaction given below:
A device that converts energy of the combustion of fuels like hydrogen and methane, directly into electrical energy is known as:
In $S_N2$ substitution reaction of the type $\text{R-Br} + \text{Cl}^- \xrightarrow{\text{DMF}} \text{R-Cl} + \text{Br}^-$, which one of the following has the highest relative rate?
$\text{CCl}_2\text{F}_2$ is one of the most common haloalkanes used in industries. The reaction through which it is manufactured from tetrachloromethane is called: