List of top Chemistry Questions

In the following sequence of reactions, $ {CH3CH2OH->[P+I_2]A->[Mg][ether]B->[HCHO]C->[H_2O]D}$ the compound $D$ is

In the change $ {[Cu(H2O)6]^2+ ->[HCl] }[CuC(H_2O)_5]^+$, the colour changes from

In conversion of lime-stone to lime, $ {CaCO_3(s)->CaO(s) +CO2(g)}$ the vales of $?H^?? and $?S^?? are $+179.1\, kJ\, mol^{-1}$ and $160.2\, J/K$ respectively at $298\, K$ and $1 \,bar$. Assuming that $?H^?? do not change with temperature, temperature above which conversion of limestone to lime will be spontaneous is

If $ AgI $ crystallizes in zinc blende structure with $I^{-}$ ions at lattice points. What fraction of tetrahedral voids is occupied by $Ag^{+}$ ions?

Identify the correct statement regarding a spontaneous process

Hydrogen can be prepared by the action of dil $H_{2}SO_{4}$ on

Graph between $P$ and $V$ at constant temperature is

Ethyl bromide is industrially prepared from

Equal masses of methane and oxygen are mixed in an empty container at $25^??$. The fraction of the total pressure exerted by oxygen is

Which does not replace hydrogen from $ HCl $ ?

Which compound is aromatic?

$ _{11}N{{a}^{23}} $ is formed from $ _{11}N{{a}^{24}} $ by the

Glucose reacts with excess of phenyl hydrazine and forms

Natural rubber is a polymer of

$ PC{{l}_{5}} $ is possible but $ NC{{l}_{5}} $ does not exist

Lithopone is

Which does not reacts with Fehling solution?

Electron deficient molecule is

During isothermal expansion of ideal gas, its

Cyanogen gas is obtained in the reaction

Potassium is kept in

Glauber salt is

Important ore of zinc is

A metal which is refined by polling is

Nessler's reagent is