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

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

A compound 'A'with molecular formula \({C_5H_{10}O}\)gives a positive \({2,4-DNP}\) test but a negative Tollen's test. On treatment with sodium hypochlorite, it gives \({CHCl_3}\) and compound 'B'. Compound 'B' is

$CO$ is a stronger ligand than $Cl^-$ because

The sulphur compound in which the sulphur atom has octet configuration in its valence shell among the following is

Which of the followings forms the base of talcum powder?

Which of the following method gives better yield of p-nitrophenol?