List of top Chemistry Questions

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 K_H 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

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?

Which of the following minerals contains manganese?

The spot at which corrosion occurs on the surface of an iron material, behaves as

The impurities such as soil and sand associated with ore are called

In nature, gold metal is available in free state(native), because

Triple bond between nitrogen atoms in N₂ molecule contains

If the valency of sodium is 1 and oxygen is 2, then the formula of compound formed between sodium and oxygen is

When a metal atom forms ionic bond with a non-metal atom, the metal atom will