Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions

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?

Which of the following group 15 elements forms metallic bonds in an elemental state?

Which of the following has the highest pπ–pπ bonding tendency?

Which of the following species has the highest dipole moment?

The correct decreasing order of basic strength is:

The p-block element of group 15 that forms predominantly basic oxide is _____________.

With respect to protonic acids, which of the following statement is correct?

Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms only one well-characterised compound in +5 oxidation state. The compound is ______.

Which of the following trihalide is unstable?

Which of the following element will form acidic oxides of type E₂O₃?