Boron cannot form which one of the following anions?

(1) BO2-

(2) BF63-

(3) BH4-

(4) B(OH)4-

Which of the following is NOT the combined from of carbon?

Atomic numbers of four elements are as follows : F(9), P(15), Cl(17), Ar(18). Which of the following two elements would be chemically similar?

Factors that may influence enzyme activity?

Which term describes an enzyme?

In a combination reaction there can be ______.

I. two or more than two reactants

II. two or more than two products

III. only one product

Which statement(s) is/are CORRECT regarding Dalton’s Atomic theory?

I. All matters are made of very tiny particles.

II. Atoms of different elements have different masses and chemical properties.

III. The relative number of atoms is variable in any compound.

In the Modern Periodic Table, elements are arranged in

Which of the following metals is the most Malleable?