List of top Chemistry Questions

Which of the following statement is correct for the stability of ions of ethyl alcohol and phenol:

Which compound has planar structure:

Which complex compound will give four isomers:

At infinite dilution equivalent conductances of \(Ba^{2+}\) & \(Cl^–\) ions are  \(127\)  & \(76\) \(ohm^{–1}cm^{–1}eq^{–1}\) respectively. Equivalent conductance of \(BaCl_2\) at infinite dilutions is:

R and S enantiomer are differ in:

Volume of \(CO_2\) obtained by the complete decomposition of \(9.85\ gm \ BaCO_3\) is:

Which one of the following method is commonly used method for destruction of colloid:

For the reaction  \(C_2H_5OH(l)+3O_2(g)→ 2CO_2(g)+3H_2O(l)\) which one is true:

At \(27ºC\) latent heat of fusion of a compound is \(2930\  J/mol\). Entropy change is:

\(\text {For\  the\  disproportionation\  of \ copper:}\) \(2Cu+→Cu^{+2}+Cu\), \(Eº\) \(\text {is:}\)
\((\text {Given \ Eº  \ for }\ Cu^{+2}/Cu \ \text {is}\  0.34\ V\ \text { and\   Eº \ for} \ Cu^{+2}/Cu^+\ \text { is}\  0.15\ V)\)

The relationship which describes the variation of vapour pressure with temperature is called

Maximum frequency of emission is obtained for the transition:

The life span of atomic hydrogen is:

For given energy, corresponding wavelength will be E=3.03×10^–19Joules(h=6.6×10^–34J.sec., C=3×10⁸m/sec.)

Isoelectronic species are:

In Friedal craft reaction Toluene can be prepared by:

Increasing order of electrophilic substitution for following compounds:

1, 3-butadiene has:

The ionic carbide is:

Oxidation numbers of \(A,B\) and \(C\) are \(+2,+5\) and \(– 2\) respectively possible formula of compound is:

The activation energy for a reaction is 9.0 kcal/mol. The increase in the rate constant when its temperature is increased from 298 K to 308 K is:

The chief component of cement is:

A drug that is antipyretic as well as analgesic is

Flux is used to