List of top Chemistry Questions

The sulphide ore of copper is concentrated by:
SO have
A compound has $C =40 \%, H =13.33 \%$ and $N =46.67 \% .$ The empirical formula is:
Increasing order of electrophilic substitution for following compounds:
electrophilic substitution
Isoelectronic species are:
For given energy, corresponding wavelength will be E=3.03×10–19Joules(h=6.6×10–34J.sec., C=3×108m/sec.)
In Friedal craft reaction Toluene can be prepared by:
The life span of atomic hydrogen is:
\(\text {Shape \ of }\ Fe(CO)_5\  \text {is:}\)

Correct order of dissociation energy of  \(N_2\) and \(N_2^+\) is:

Average molar kinetic energy of \(CO\) and \(N_2\) at same temperature is:

\(2Zn +O_2→2ZnO \ \ \ \ ∆Gº=–616J \)
\(2Zn+S_2→2ZnS\ \ \ \  ∆Gº=–293J \)
\(S_2+2O_2→2SO_2\ \ \ \  ∆Gº=–408J \)
\(∆Gº\ for\  the\  following \ reaction\  is: \)
\(2ZnS+3O_2→2ZnO+2SO_2\)
Volume of \(CO_2\) obtained by the complete decomposition of \(9.85\ gm \ BaCO_3\) is:
Which compound has planar structure:
Which ion is colourless:
Which compound form linear polymer due to H-bond:
Which statement is wrong:
Which of the following compound is electron deficient:
Which one is responsible for produce energy in bio reaction:

Reduction by \(LiAlH_4 \) of hydrolysed product of an ester gives:

First product of the reaction between \(RCHO\) and \(NH_2NH_2\):

Ethyl benzoate can be prepared from benzoic acid by using:
Which pair have not equal dimensions:
The correct order of acidic strength is
Which of the following is not oxidised by $ KMnO_{4}^{-} $ ?