List of top Chemistry Questions

Nylon is a
Among second period elements/the correct order for first ionisation enthalpy is
$H A$ is a weak acid. At $25^{\circ} C$, the molar conductivity of $0.02\, M\, H A$ is $150\, \Omega^{-1} cm ^{2} mol ^{-1}$. If its $\Lambda_{ m }^{ o }$ is $300\, \Omega^{-1} cm ^{2} mol ^{-1}$, then equilibrium constant of $H A$ dissociation is
$K_{p} / K_{c}$ for the reaction $A(g)+2 B_{2}(g) \rightleftharpoons A B_{2}(g)$ is
n-hexane on heating to $773 \,K$ at $10-20$ atmospheric pressure in the presence of oxides of vanadium supported over alumina, yields
A gas at high temperature is cooled. The highest temperature at which liquefaction of gas first occurs is called
The compound formed upon combustion of potassium metal in excess air is
The number of tetrahedral and octahedral void per unit cell of cubic closed packed structure is
When the following amide is treated with $Br_{2}/KOH$, it gives
In an acidified aqueous solution of $Mn ^{2+}, Ni ^{2+}, Cu ^{2+}$ and $Hg ^{2+}$ ions, $H _{2} S$ gas was passed. Precipitates are
One mole of NaCl contains 6.023 ??10 molecules of sodium chloride. 58.5 g of NaCl also contains 6.023 ??10 molecules of NaCl.
Decreasing order of stability of $O_2, O^-_2, O_2^+ $ and ${ O_2^{2-}}$ is :
In which of the following pairs, both the species are not isostructural ?
A gas such as carbon monoxide would be most likely to obey the ideal gas law at :
The number of water molecules is maximum in :
Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified ${KMnO4}$ for complete oxidation ?
Glycogen is
Pick the incorrect statement among those given below.
Which of the following compounds is responsible for depletion of ozone layer?
$\lambda^{\circ}_m$ for $ {NH_4Cl, NaOH}$ and $ {NaCl}$ are $130, 248$ and $ {126.5\, ohm^{-1} \, cm^2 \, mol^{-1}}$ respectively. The $\lambda^{\circ}_m$ of $ {NH_4OH}$
Consider the acid strength of the carboxylic acids: (i) $ {PhCOOH}$ (ii) $o - { NO_2C_6H_4COOH}$ (iii) $p- {NO_2C_6H_4COOH}$ (iv) $m- {NO_2C_6H_4COOH}$
Sulphur sol is an example of
Gabriel phthalimide synthesis is used for the preparation of
Strongest reducing agent among the following is (i) $ {Na^+ + e^- ->Na_{(s)} \:\: E^{\circ} = - 2.71 \, V}$ (ii) $ {Al^{3+} + 3e^- ->Al_{(s)} \:\: E^{\circ} = - 1.66 \, V}$ (iii) $ {F_{2(g)} + 2e^- ->2F^- \:\: E^{\circ} = + 2.87 \, V}$ (iv) ${2H_2 O+ 2e^- ->H_{2(g)} + 2OH^-_{(aq)} \:\: E^{\circ} = - 0.83\, V}$
Sodium rosinate is generally added in the soap because it