List of top Chemistry Questions

Complete and balance the following equations:
(i) $2Na_2CrO_4 + 2H^+ \longrightarrow$
(ii) $5S^{2-} + 2MnO_4^- + 16H^+ \longrightarrow$
Rate constant k for the first order reaction is $2.54 \times 10^{-3} s^{-1}$. Calculate the time required for three-fourth of the reactant to decompose. $(\log 4 = 0.60)$
Write the unit of (i) second order reaction and (ii) zero order reaction.
The concentration of the reactant is reduced from 0.6 mol $L^{-1}$ to 0.2 mol $L^{-1}$ in 5 minutes in a first order reaction. Calculate rate constant of the reaction. $(\log 3 = 0.48)$
Why second ionization enthalpies of chromium and copper are exceptionally higher than those of their neighbouring elements?
Why transition elements form interstitial compounds?
Define Effective collision.
Indicate the type of isomerism exhibited by the following complex: $[Co(en)_3]Cl_3$
Assertion (A): The molecularity of the given reaction is 2
$2HI \longrightarrow H_2 + I_2$
Reason (R): Two molecules of the reactants are involved in simultaneous collision between them.
Define coordination number.
Assertion (A): Aromatic primary amines can be prepared by Gabriel Phthalimide synthesis.
Reason (R): Aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.
Assertion (A): Zinc, cadmium and mercury are not considered as transition elements.
Reason (R): These elements have completely filled orbitals in their ground state as well as in their common oxidation states.
Assertion (A): Glucose gets oxidized to six carbon gluconic acid on reaction with bromine water.
Reason (R): The carbonyl group is absent in the open chain structure of glucose.
Proteins are polymers of $\alpha$-amino acids which are joined to each other by:
Which of the following reactions is not explained by the open chain structure of glucose?
Which of the following molecules is chiral in nature?
The base which is present in DNA but not in RNA is:
Identify the compound produced by the reduction of Ethanenitrile with Lithium aluminium hydride:
Identify the correct increasing order of boiling points of the given compounds:
Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol
The correct IUPAC name of the complex $[Pt(NH_3)_2Cl_2]$ is:
Which of the following is heteroleptic complex?
Consider the following reaction:
$Zn_{(s)} + Ag_2O_{(s)} + H_2O_{(l)} \rightarrow Zn^{2+}_{(aq)} + 2Ag_{(s)} + 2OH^-_{(aq)}$
Given: $E^\circ_{Ag^+/Ag} = 0.80~V$, $E^\circ_{Zn^{2+}/Zn} = -0.76~V$, $1~F = 96500~C~mol^{-1}$. $\Delta_r G^\circ$ for the above reaction is:
Electronic configuration of chromium is:
The order for the given reaction is:
$A + 2B \rightarrow Products$
$Rate = k[A]^{\frac{1}{2}}[B]^1$
Identify the correct statement: