List of top Chemistry Questions

Some enzyme catalysed reactions which occur at metal surfaces are:
Which of the following aqueous mixture is a buffer solution?
Which of the following molecule has the highest dipole moment?
Which of the following isoelectronic species has the smallest radius?
The number of angular and radial nodes present in '4d' orbitals are respectively:
What is the mass of water formed when 1.6 g of methane gas is completely burnt in excess oxygen?
The correct electronic configuration of Tc (Z = 43) is:
10 mL of 0.5 M NaCl is required to coagulate 1L of \( Sb_2S_3 \) sol in 2 hours time. The flocculating value of NaCl (in millimoles) is:
In the reaction: \[ NH_2CONH_2 + 2H_2O \rightarrow [X] \rightleftharpoons 2NH_3 + H_2O + [Y] \] The hybridization of carbon in \( X \) and \( Y \) respectively are:
Among the hydrides \( NH_3, PH_3, \) and \( BiH_3 \), the hydride with highest boiling point is \( X \) and the hydride with lowest boiling point is \( Y \). What are \( X \) and \( Y \) respectively?
Kaolinite is a silicate mineral of metal 'X' and calamine is a carbonate mineral of metal 'Y'. X and Y respectively are:

Xenon (VI) fluoride on complete hydrolysis gives an oxide of xenon 'O'. The total number of \( \sigma \) and \( \pi \) bonds in 'O' is:

The number of -OH groups present in the structures of bithionol, terpineol, and chloroxylenol is respectively:

Identify the complex ion with electronic configuration \( t_{2g}^{3} e_{g}^{2} \).

Identify the structure of the polymer ‘P’ formed in the given reaction: 

Conversion of X to Y in the given reaction corresponds to:

Which of the following vitamins is also called pyridoxine?
In which of the following ions the spin-only magnetic moment is lowest?

Match the following: 

The standard enthalpy of combustion of C (graphite), H\(_2\) (g) and CH\(_3\)OH (l) respectively are \(-393\), \(-286\) and \(-726\) kJ mol\(^{-1}\). What is the standard enthalpy of formation of methanol?
Lactose is composed of:
Which of the following is used as an insect attractant?
The reagent used for the conversion of but-2-ene to ethanol is:
The major products formed when one mole of \( \text{CH}_3\text{CH}_2\text{CH}(\text{CH}_3)\text{CH}_2\text{OCH}_2\text{CH}_3 \) is treated with one mole of HI are:
A tertiary alkyl halide (X), C\(_4\)H\(_9\)Br, reacted with alc.KOH to give compound (Y). Compound (Y) reacted with HBr in presence of peroxide to give compound (Z). The compounds (Y) and (Z) are respectively: