List of top Chemistry Questions

Answer the following about the complexes \([ \text{FeF}_6]^{3-} \text{ and } [\text{Fe(CN)}_6]^{4-}\):
(i) Write the hybridization involved in each case.
(ii) Which of them is the outer orbital complex and which one is the inner orbital complex?
(iii) Compare their magnetic behaviour.
[Atomic number: Fe = 26]
Vapour pressure of pure water at 298 K is 24.8 mm Hg. Calculate the lowering in vapour pressure of an aqueous solution which freezes at –0.3°C. (K\(_f\) of water = 1.86 K kg mol\(^{-1}\))
Assertion (A): Phenol is strongly acidic as compared to ethanol.
Reason (R): Phenoxide ion is more stable than ethoxide ion.
State Henry's law. Why are aquatic species more comfortable in cold water as compared to warm water?
Observe the graph in the given figure and answer the following questions:
linear relationship between log |R0| and time.

(a) Predict the order of reaction.
(b) What is the slope of the curve?
How do you explain the following?
(a) Presence of an aldehyde group in glucose.
(b) Presence of five –OH groups in glucose.
Differentiate between:
(i) Double salt and Complex compound
(ii) Didentate ligand and Ambidentate ligand
Write IUPAC names of the following coordination compounds:
\([ \text{CoCl}_2(\text{en})_2]\text{SO}_4 \)
(ii) \( \text{K}_3[\text{Fe}(\text{C}_2\text{O}_4)_3] \)
(ii) Didentate ligand and Ambidentate ligand
Draw the structures of major monohalo products in each of the following reactions:
methylbenzene (CH3C6H5)

\( \text{CH}_3\text{C}_6\text{H}_5 + \text{HI} \longrightarrow \) ?
(b) \( \text{C}_6\text{H}_6 + \text{Br}_2 \longrightarrow \) Heat or UV light ?
Which of the following cell converts the energy of combustion of fuel into electrical energy?
The unit of rate and rate constant are the same for a:
Assertion (A): Actinoids show wide range of oxidation states.
Reason (R): Actinoids are radioactive in nature.
Assertion (A): Boiling point of (CH₃)₃N is higher than that of CH₃CH₂CH₂NH₂.
Reason (R): Hydrogen bonding is more extensive in CH₃CH₂CH₂NH₂.
Pyranose ring of glucose is formed due to the reaction between:
Assertion (A): Hydrolysis of an ester follows first order kinetics.
Reason (R): The concentration of water does not get altered much during the reaction.
A solution of acetone in ethanol:
Which of the following is the softest metal?
According to Werner’s theory of coordination compounds:
The freezing point of one molal KCl solution, assuming KCl to be completely dissociated in water, is: (\(K_f\) for water = 1.86 K kg mol\(^{-1}\))
Which of the following complex ions is not optically active?
Which one of the following amines gives an alcohol on reaction with HNO₂?
In the Hinsberg method for separation of primary, secondary, and tertiary amines, the reagent used is:
Williamson synthesis of preparing unsymmetrical ether is:
Which of the following compounds would be hydrolyzed by aqueous KOH most easily?
The work done by a gas during an isothermal expansion from 2 L to 4 L at a constant temperature, with pressure initially at 2 atm, is: (Use R = 8.314 J/mol·K, T = 300 K).