List of top Chemistry Questions

Write short notes on the following:
Explain the mechanism of electrophilic substitution in haloarenes with the help of an example.
Write chemical equations of the following reactions:
Differentiate between elimination and substitution reactions in haloalkanes by an example.
Write a short note on RNA.
Explain first-order reaction. The value of velocity (rate) constant \( k \) for a first-order reaction is \( 5 \times 10^{-14} \, \text{s}^{-1} \). Calculate the half-life period of the reaction.
Explain Valence Bond Theory (VBT) in coordination compounds.
Why does the +3 and +4 oxidation state of Cerium (Ce) remain stable?
The boiling point of alcohols increases with the increase in the number of carbon atoms but decreases on branching. Why?
Write structural formula of primary, secondary, and tertiary benzylic alcohol.
Is oxidation of bromide ion into bromine by ferric ion possible?
Explain velocity (rate) constant of a reaction.
Explain co-ordination number by giving an example.
Write general electronic configuration of d-block and f-block elements.
Write chemical equations for the reaction of (x) ethanamine with HCl and (y) aniline with \( NaNO_2 \) and dilute HCl at \( 0^\circ C \).
What are amines? Write one differentiating test for primary, secondary, and tertiary amines.
Write a short note on Rosenmund reduction. Write only the chemical equation of the reaction of ethyne with water in presence of \( H_2SO_4 \) and \( HgSO_4 \).
State the role of hormones in our body.
State important applications of phenol.
State the difference between molecularity of a reaction and order of a reaction. Write the velocity equation for the reaction \( H_2(g) + Cl_2(g) \rightarrow 2HCl(g) \), which is a zero-order reaction.
Write ions produced in an aqueous solution of \( K_4[Fe(CN)_6] \). What is the oxidation number of \( Fe \) in this compound?
Calculate the normality of a solution prepared by dissolving 325 g of anhydrous sodium carbonate (\( Na_2CO_3 \)) in 250 mL of water. Equivalent weight of \( Na_2CO_3 \) is 5
Write the difference between Galvanic cell and Electrolytic cell.
Electrode potential of standard hydrogen electrode is:
The true statement for the formula \( K = Ae^{-E_a / RT} \) is: