List of top Chemistry Questions

Which enzyme catalyses the reaction of CO\(_2\) with water in human body?

What is the oxidation number of carbon in K\(_2\)C\(_2\)O\(_4\)?

What is the time required to deposit one millimole of aluminium by passage of 9.65 ampere through aqueous solution of aluminium ions?

α–halogenation of carboxylic acid is called

Mass of unit cell of an element is \(4.15 \times 10^{-24}\) g. If edge length of unit cell is \(3.50 \times 10^{-8}\) cm, what is the density of element?

Which antibiotic from the following contains N = N linkage?

What type of hybridization results in trigonal geometry?

Identify the product obtained when phenol is treated with bromine water.

A solution has an osmotic pressure of X kPa at 300 K having one mole of solute in \(10.5\ \text{m}^3\) of solution. If its osmotic pressure is reduced to \(\frac{1}{10}\) of its initial value, what is the new volume of solution?

What type of hybridization is observed in interhalogen compounds of the type XX\(_3\)?

Which of the following pairs of moving phase and stationary phase respectively is correct for column chromatography?

Which of the following polymers contain ester linkage?

Identify product B in the following reaction.
Phenol \(\xrightarrow{\text{NaOH}}\) A \(\xrightarrow{\text{CH}_3\text{I}}\) B

A solution is 0.50% by weight. What is the weight of solvent containing 2.50 g solute?

Which of the following statements is correct according to Werner’s theory, when excess AgNO\(_3\) is treated with CoCl\(_3\)\(\cdot\)6NH\(_3\) precipitating three moles of AgCl?

A metallic element crystallises in FCC type crystal lattice. What is the radius of atom if edge length of its unit cell is 405 pm?

Which of the following metals is refined by using a tungsten filament for heating in a vessel so that the pure metal deposits on the filament?

Identify the major product ‘B’ in the following reaction.
Propene \(\xrightarrow{\text{HCl}}\) A \(\xrightarrow[\Delta]{\text{Aq. KOH}}\) B

The most unstable free radical among the following is

Silver crystallises in face centred cubic structure. If radius of silver atom is 144.5 pm, what is the edge length of unit cell?

The overlap of orbitals involved in the formation of C–Br bond in vinyl bromide is

A certain zero order reaction has rate constant 0.025 M s\(^{-1}\). What will be the concentration of reactant A after 15 seconds if initial concentration is 0.50 M?

Which of the following acids does not undergo HVZ reaction?

Identify IUPAC name of the following compound.
CH\(_2\)=CH–CH=CH–CH\(_2\)–Cl

Which of the following reactions of alcohols involves breaking of O–H bond?