List of top Chemistry Questions

The number of geometrical isomers of CH₃–CH=CH–CH=CHCl is
According to IUPAC system, the correct name of the compound having the formula CH₃-C(CH₂)-CH₂-CH₃
At a constant volume the specific heat of a gas is 0.075 and its molecular weight is 40. The gas is:
Which of these is least likely to act as Lewis base?
In which of the following reactions, H₂O₂ is acting as a reducing agent?
The Kₛp of CuS, Ag₂S and HgS are 10⁻⁴⁴, 10⁻³¹, 10⁻⁵⁴ respectively. The solubility order of these sulphides are in the order:
Sodium peroxide in contact with moist air turns white due to formation of:
When the temperature is raised, the viscosity of liquid decreases. This is because
Which of the following is similar to graphite?
In the periodic table, with the increase in atomic number, the metallic character of an element
Which of the following pairs has both members from the same period of the periodic table
The vapour density of ozone is
Which of the following statements is/are true? 1. PH₃ and BiCl₃ do not exist. 2. π-π bond is present in SO₂. 3. I₃^+ has bent geometry. 4. SeF₄ and CH₄ have same shape.
In redox reaction 1 g-eq of reducing agent requires P g-eq of oxidising agent. The value of P is
Chloride ion and potassium ion are isoelectronic. Then
Hydrogen atom in ground state is excited by a monochromatic radiation of λ=975. Number of spectral lines in the resulting spectrum emitted will be
A material particle with a rest mass m₀ is moving with a velocity of light c. Then the wavelength of the de Broglie wave associated with it is
The photoelectric threshold of a metal is 2000. The energy of electrons ejected from the surface by ultraviolet light of wavelength 1500 is
Two mercury drops (each of radius r) merge to form a bigger drop. The surface energy of the bigger drop, if the surface tension is T, is
Two circular plates of radius 5 cm each have a 0.01 mm thick water film between them. What will be the force required to separate these plates? (Surface tension of water = 73 dyne/cm)
The correct formula of the complex tetraammineaquachlorocobalt (III) chloride is
\([\text{Co}(NH_3)_4Cl_2]NO_2\) and \([\text{Co}(NH_3)_4ClNO_2]Cl\) exhibit which type of isomerism?
Coordination number of Ni in \([Ni(C_2O_4)_3]^{4-}\) is
Which of the following pairs has both members from the same period of periodic table :
In the periodic table, with the increase in atomic number, the metallic character of an element