The nucleus of an atom consists of

1.The nucleus of an atom consists of

A.            electrons and neutrons

B.            electrons and protons

C.            protons and neutrons

D.            All of the above

Answer: Option C

2.The number of moles of solute present in 1 kg of a solvent is called its

A.            molality                B.            molarity

C.            normality             D.            formality

Answer: Option A

3.The most electronegative element among the following is

A.            sodium                 B.            bromine

C.            fluorine                                D.            oxygen

Answer: Option C

4. The metal used to recover copper from a solution of copper sulphate is

A.            Na          B.            Ag

C.            Hg           D.            Fe

Answer: Option D

5. The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

A.            p-electrons in Ne(Z = 10)

B.            s-electrons in Mg(Z = 12)

C.            d-electrons in Fe(Z = 26)

D.            p-electrons in CI(Z = 17)

Answer: Option D

6. The metallurgical process in which a metal is obtained in a fused state is called

A.            smelting               B.            roasting

C.            calcinations         D.            froth floatation

Answer: Option A

7.            The molecules of which gas have highest speed?

A.            H2 at -73oC

B.            CH4 at 300 K

C.            N2 at 1,027oC

D.            O2 at 0oC

Answer: Option A