List of top Chemistry Questions

If the density of methanol is $0.8\, kg\, L ^{-1}$, what is its volume needed for making $4\, L$ of its $0.25\, M$ solution?

The following tripeptide can be synthesized from the following ammo acid

A gas can be liquefied at temperature $T$ and pressure $P$ provided

Cold ferrous sulphate solution on absorption of $NO$ develops brown colour due to the formation of

In a mixture, two enantiomers are found to be present in $85\%$ and $15\%$ respectively. The enantiomeric excess $(e, e)$ is

Consider the following salts: $NaCl,\, HgCl_2,\, Hg_2Cl_2,\, CuCl_2,\, CuCl$ and $AgCl$. Identify the correct set of insoluble salts in water

In benzene, the triple bond consists of

If the ionisation energy and electron affinity of an element are $275$ and $86 \,kcal\, mol^{-1}$ respectively, then the electronegativity of the element on the Mulliken scale is

Caffeine has a molecular weight of $194\, u$. If it contains $28.9\%$ by mass of nitrogen, number of atom of nitrogen in one molecule of caffeine is

Which of the following reactions is used to prepare isobutane ?

$X Cl _{2}( excess )+Y Cl _{2} X Cl _{4}+Y \downarrow$ $Y O {->[{\Delta}][{>400^{\circ} C }]} \frac{1}{2} O _{2}+Y$ Ore of Y would be ,

With excess of water, both $P_{2}O_{5}$ and $PCl_{5}$ give

Which one of the following is a case of negative adsorption?

Which one of the following monomers form biodegradable polymer?

$0.06\%\, (w/v)$ aqueous solution of urea is isotonic with

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at $25^{\circ } C$?

The hybridization involved in complex $ {[Ni(CN)4]^{2-}}$ is (At.No. Ni = 28)

The sum of coordination number and oxidation number of the metal M in the complex \([M(en)_2(C_2O_4)]Cl\) (where en is ethylenediamine) is :-

Nitrogen dioxide and sulphur have some properties in common. Which property is shown by one of these compounds, but not by the other?

The rate constant of the reaction $ A \to B$ is $0.6 \times 10^{-3}$ mole per second. If the concentration of A is 5 M, then concentration of $B$ after 20 minutes is :

The molarity of $NO_3^-$ in the solution after $2L$ of $3M \, AgNO_3$ is mixed with $3L$ of $1M \, BaCl_2$ is

The chemical composition of slag formed during the smelting process in the extraction of copper is

Point out incorrect stability order

If the equilibrium constant for ${ N2(g) + O2(g) <=> 2NO(g)}$ is K, the equilibrium constant for ${ \frac{1}{2} N_2 (g) + \frac{1}{2} O_2 (g) <=> NO(g) }$ will be :

What is the pH of the resulting solution when equal volumes of $0.1\, M \,NaOH$ and $0.01\, M$ $HCl$ are mixed ?