Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

The most abundant metal on earth is:

The sulphide ore of iron is ____________.

Carbonate ore of iron is ____________.

Elements having +5 oxidation state is ____________.

[Ar]3d¹⁰4s²4p³ is the electronic configuration of ____________.

The most common oxidation states of nitrogen are ____________.

In which of the following compound, nitrogen shows the oxidation state of +5?

Maximum covalency of nitrogen is ______.

Which among the following forms basic oxide?

Carbohydrates Which taste sweet are called:

The existence of a substance in more than one solid modifications is known as ____________.

Which of the following is not a characteristic property of solids?

Which of the following is not a characteristic of a crystalline solid?

The tribasic acid is ____________.

The strongest oxidising agent is ____________.

The correct order of solubility in water for He, Ne, Ar, Kr, Xe is:

The element which forms oxides in all oxidation states varying from +1 to +5 is ____________.

Ionic radii (in Å) of As³⁺, Sb³⁺ and Bi³⁺ follow the order:

Collectively the elements of group 15 are called:

Which one of the following elements is most metallic?