List of top Chemistry Questions

The amino acid Tryptophan is the precursor for the synthesis of :

Suppose the elements $X $ and $Y$ combine to form two compounds $XY_2$ and $X_3Y_2$. When $0.1$ mole of $XY_2$ weighs $10\, g$ and $0.05$ mole of $X_3Y_2$ weighs $9\, g$, the atomic weights of $X$ and $Y$ are

In a protein molecule various amino acids are linked together by:

Consider the following liquid-vapour equilibrium ${Liquid <=> Vapour }$ Which of the following relations is correct ?

How many electrons can fit in the orbital for which $n = 3$ and $l = 1$ ?

Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reaction does not show oxidizing behaviour?

For a sample of perfect gas when its pressure is changed isothermally from $p_i$ to $p_f$, the entropy change is given by

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape ?

During the electrolysis of molten sodium chloride, the time required to produce $0.10$ mol of chlorine gas using a current of $3$ amperes is

Consider the reaction ${ CH3CH2CH2Br + NaCN -> CH3CH2CH2CN + NaBr } $ This reaction will be the fastest in

Consider the nitration of benzene using mixed conc. $ {H_2SO_4}$ and ${HNO_3}$. If a large amount of ${KHSO_4}$ is added to the mixture, the rate of nitration will be :

Among the following, which one is a wrong statement?

Among the following the correct order of acidity is :

At $100^{\circ} C$ the vapour pressure of a solution of $6.5 \,g$ of a solute in $100 \,g$ water is $732\, mm$. If $K_b = 0.52$, the boiling point of this solution will be:

The correct statement regarding the basicity of arylamines is:

Predict the correct order among the following:

The addition of a catalyst during a chemical reaction alters which of the following quantities ?

Fog is a colloidal solution of

Which of the following has two stereoisomers?

An aqueous solution of a salt $MX_2$ at certain temperature has a van?t Hoff factor of 2. The degree of dissociation for this solution of the salt is :

A solution contains 4 g of NaOH and 16.2 g of water. The mole fraction solute and solvent are respectively

The following equations indicate reactions that occur spontaneously.
Fe(s) + NiCl$_2$(aq) $\rightarrow$ FeCl$_2$(aq) + Ni(s)
Zn(s) + FeCl$_2$(aq) $\rightarrow$ ZnCl$_2$(aq) + Fe(s)
Ni(s) + PbCl$_2$(aq) $\rightarrow$ NiCl$_2$(aq) + Pb(s)
Which is the increasing order of the reactivity of the metals?

Gas A decomposed according to the following reaction:
A(g) $\rightarrow$ B(g) + C(g)
A student conducted an experiment and determined that the equilibrium pressure of gas A was 0.20 P, where P was the total pressure of the system. What is the equilibrium constant $K_p$ for this reaction?