JAMB Chemistry Past Questions & Answers - Page 275

1,371.

Deliquescent substances are also?

A.

efflorescent

B.

anhydrous

C.

hygroscopic

D.

insoluble

Correct answer is C

No explanation has been provided for this answer.

1,372.

Helium is often used in observation balloons because it is?

A.

light and combustible

B.

light and non-combustible

C.

heavy and combustible

D.

heavy and non-combustible

Correct answer is B

No explanation has been provided for this answer.

1,373.

Which of the following statements is FALSE about isotopes of the same element?

A.

They have the same number of electrons in their outermost shells

B.

They have different atomic masses

C.

They have the same atomic number and the number of electrons

D.

They have the same atomic number but different umber of elelctrons

Correct answer is D

No explanation has been provided for this answer.

1,374.

The ability of ionic solids is generally due to the?

A.

negative electron affinity of most atoms

B.

crystal lattice forces

C.

electron pair sharing

D.

positive ionization potentials

Correct answer is B

No explanation has been provided for this answer.

1,375.

In the oil drop experiment, Millikan determined the?

A.

charge to mass ratio of the electron

B.

mass of the electron

C.

charge of the electron

D.

mass of the proton

Correct answer is C

No explanation has been provided for this answer.