List of top Chemistry Questions

Arrange benzene, n-hexane and ethyne in decreasing order of their acidic behaviour
Higher order (>3) reactions are rare due to
The correct IUPAC name of
Compound
The rate of a gaseous reaction is given by the expression k[A][B]2. If the volume of vessel is reduced to one half of the initial volume, the reaction rate as compared to original rate is
If the rate constant for a first order reaction is k, the time(t) required for the completion of 99% of the reaction is given by
The third ionisation enthalpy is highest in
For a reaction A + 2B → Products, when concentration of B alone is increased half life remains the same. If concentration of A alone is doubled, rate remains the same. The unit of rate constant for the reaction is
\(H_{2(g)}+2AgCl_{(s)}⇌2Ag_{(s)}+2HCl_{(aq)}\)
\(E^{\degree}_{cell}\) at 25° C for the cell is 0.22 V. The equilibrium constant at 25° C is
The resistance of 0.01 m KCl solution at 298 K is 1500Ω. If the conductivity of 0.01 m KCl solution at 298 K is 0.1466 × 10-3 S cm-1. The cell constant of the conductivity cell in cm-1 is
The number of angular and radial nodes in 3p orbital respectively are
Consider the following electrodes
P = Zn2+ (0.0001 M)/Zn  Q = Zn2+ (0.1 M)/Zn
R = Zn2+ (0.01 M)/Zn       S = Zn2+ (0.001 M)/Zn
E°Zn/Zn2+ = 0.76 V Electrode potentials of the above electrodes in volts are in the order
The vapour pressure of pure liquids A and B are 450 and 700 mm of Hg at 350 K respectively. If the total vapour pressure of the mixture is 600 mm of Hg, the composition of the mixture in the solution is
The KH value (K bar) of Argon (I), Carbondioxide (II) formuldehyde (III) and methane (IV) are respectively 40.3, 167, 1.83×10-5 and 0.413 at 298 K. The increasing order of solubility of gas in liquid is
Choose the correct statement
A pure compound contains 2.4g of C, 1.2 × 1023 atoms of H, 0.2 moles of oxygen atoms. Its empirical formula is
Henry’s law constant for the solubility of N2 gas in water at 298K is 1.0 × 105 atm. The mole fraction of N2 in air is 0.8. The number of moles of N2 from air dissolved in 10 moles of water at 298K and 5 atm pressure is
A metal crystallises in BCC lattice with unit cell edge length of 300 pm and density 6.15 g cm-3. The molar mass of the metal is
The correct statement regarding defects in solid is
In Chrysoberyl, a compound containing Beryllium, Aluminium and oxygen, oxide ions form cubic close packed structure. Aluminium ions occupy \(\frac{1}{4}\)th of octahedral voids. The formula of the compound is
The hydrocarbons containing —CONH2 functional group are called CONH)
In hydrocarbons, which type of bonds does carbon form?
For hydrocarbons, if the molecular formula increases, then melting point
Hydrocarbons that contain only single bonds between the carbon atoms are called
The ability of an element to form the longest chain with its own atoms is called as
Which of the following methods is used to prevent corrosion?