List of top Chemistry Questions

The organic chloro compound, which shows complete sterochemical inversion during a $ {S_{N^2}}$ reaction, is

$0.01 M$ solution of $KCl$ and $BaCl _{2}$ are prepared in water. The freezing points of $KCl$ is found to be $-2{ }^{\circ} C$. What is the freezing point of $BaCl _{2}$ to be completely ionised?

A unit cell of sodium chloride has four formula units. The edge length of the unit cell is $0.0564\, nm$. What is the density of sodium chloride?

Non-oxide ceramics can be

Which one of the following is most reactive towards electrophilic attack ?

When $o$- or $ p- $ phenolsulphonic acid is treated with bromine water, the product formed is

In Williamson's synthesis, ethoxyethane is prepared by

In which of the following compounds $ -OH $ group is least reactive?

If $ N{{a}^{+}} $ ion is larger than $ M{{g}^{2+}} $ ion and $ {{S}^{2-}} $ ion is larger than $Cl^-$ ion, which of the following will be stable soluble in water?

Anisole can be prepared by the action of methyl iodide on sodimn phenate. The reaction is called

An organic compound, $ {{C}_{3}}{{H}_{6}}O $ does not give a precipitate with $2, 4$-dinitrophenyl hydrazine reagent and does not react with metallic sodium. It could be

Acetophenone when reacted with a base , $C_2 H_5 ONa,$ yields a stable compound which has the structure . The state of hybridisation of S in $SO_2$ is similar to that of

The chemical formula of 'tear gas" is

Non-oxide ceramics can be

During the dehydration of alcohols to alkenes by heating with conc. $H_2SO_4$, the initiating step is

The atomic number of an element $ M $ is $26R$ . How many electrons are present in the M-shell of the element in its $M^{3+}$ state?

Which one of the following reactions is called Rosemond reaction?

The raw material used in nylon-$6$ is

Which of the following is the decreasing order of boiling points of $ V $ group hydrides?

What is the wave number of $4^{th}$ line in Balmer series of hydrogen spectrum? $(R=1,09,677\,cm^{-1})$

Disperse phase and dispersion medium in butter are respectively

A mixture of amylose and amylopectin is called

Protein is a polymer of