List of top Chemistry Questions

Which one of the following ion has the highest value of ionic radius ?

In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to :

Aluminium displaces hydrogen from dilute HCl whereas silver does not. The E.M.F. of a cell prepared by combining $Al /Al^{+3}$ and $Ag/Ag^{+}$ is $2.46\, V.$ The reduction potential of silver electrode is $+ 0.80\, V$. The reduction potential of aluminium electrode is :

When $50\, cm ^{3}$ of $0.2\, N$ $H_{2} SO _{4}$ is mixed with $50 cm ^{3}$ of $1 N\, KOH$, the heat liberated is :

Number of electrons in the valence orbit of nitrogen in an ammonia molecule are

Propene on addition with $ HI, $ gives:

Ethyl chloride is converted into diethyl ether by:

Acetylene on treating with $Cu _{2} Cl _{2}$ gives :

Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is

The molecular formula of diphenylmethane How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom

A solid compound 'X' on heating gives CO₂ gas and a residue. The residue mixed with water forms 'Y'. On passing an excess of CO₂ through 'Y' in water, a clear solution, 'Z' is obtained. On boiling 'Z', compound 'X' is reformed. The compound 'X' is

Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine

Among K, Ca Fe and Zn, the element which can form more than one binary compound with chlorine is

The enzyme which hydrolysis triglycerides to fatty acids and glycerol is called

The helical structure of protein is stabilized by

Which one of the following structures represents the peptide chain

A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid

Which of the following forms cationic micelles above certain concentration ?

The poisonous gas obtained on exposing chloroform to air and sunlight is

Vinegar is:

Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in

$SO_2$ acts as temporary bleaching agent but $Cl_2$ acts as permanent bleaching agent. Why ?

When 2.0 g of a non-volatile solute was dissolved in 90 gm of benzene, the boiling point of benzene is raised by 0.88 K. Which of the following may be the solute ?$(K_b\, for \,benzene = 2.53 K kg mol^{-1})$