List of top Chemistry Questions

What is the value of electron gain enthalpy of $Na^+$ if $IE_1$ of $Na = 5.1 \, eV$?

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

A solution contains ${Fe^{2+}, Fe^{3+}}$ and $I^-$ ions. This solution was treated with iodine at ${ 35^{\circ} C. E^{\circ}}$ for ${Fe^{3+} /Fe^{2+}}$ is $+0.77 \, V$ and $E^{\circ}$ for $I_2/2I^- = 0.536 \, V.$ The favourable redox reaction is-

A gaseous mixture was prepared by taking equal moles of $CO$ and $N_2.$ If the total pressure of the mixture was found $1$ atmosphere, the partial pressure of the nitrogen $(N_2)$ in the mixture is

Two different electrolytic cells filled with molten $Cu(NO_3)_2$ and molten $Al(N0_3)_3$ respectively are connected in series. When electricity is passed 2. 7 g Al is deposited on electrode. Calculate the weight of Cu deposited on cathode. $[Cu = 63 .5; Al= 27 .0 g mol^{-1} ]$

Enthalpy change for the reaction, $4 H _{( g )} \rightarrow 2 H _{2( g )}$ is $-869.6\, kJ$ The dissociation energy of $H - H$ bond is

The correct order of increasing bond length of $ C - H, C - O, C - C$ and $ C = C $ is

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description ?

Ammonia gas does not evolve from the complex $FeCl_3$ $\cdot$ $4NH_3$ but it gives white precipitate with aqueous solution of $AgNO_3.$ Coordination number of central metal ion in the above complex is six. Give IUPAC name of the complex.

Give IUPAC name of the product, when acetamide is heated with anhydrous phosphorus pentoxide

How glucose is related with fructose?

For a first order reaction, the initial concentration of a reactant is 0.05 M. After 45 min it is decreased by 0.015 M. Calculate halfreaction time. $(t_{1/2})$

How can you say that glucose is cyclic compound?

$1$-Chlorobutane on reaction with alcoholic potash gives

Which one of the following is not aromatic?

Among the following, the compound that is readily soluble in water is

When $O_2$ is converted into $O_2^+$

Which one of the following is employed as Antihistamine?

Two aromatic compounds having formula $C_7H_8O$ which are easily identifiable by $FeCl_3$ solution test (violet colouration) are

Reaction of formaldehyde and ammonia gives

The amount of the heat released when $20\,mL$ $0.5\, M\, NaOH$ is mixed with $100\, mL\, 0.1\, M\, HCl$ is $x\, kJ$. The heat of neutralization is

Which of the following compounds has maximum volatility?

The ease of Nitration of the following three hydrocarbons follows the order

The ease of dehydrohalogenation of alkyl halide with alcoholic $KOH$ is

Among the alkenes which one produces tertiary butyl alcohol on acid hydration