WAEC Past Questions and Answers - Page 1326

6,626.

How many coulombs of electricity would liberate 1.08g of Ag from a solution of silver salt?

[Ag = 108.0; 1F = 96500 C]

A.

96500 C

B.

9650 C

C.

965 C

D.

9.65 C

Correct answer is C

No explanation has been provided for this answer.

6,627.

The reactivity of fluorine is high because of 

A.

its high electronegativity

B.

the small size of the fluorine atom

C.

the availability of d-orbitals

D.

the strong F-F bond

Correct answer is A

No explanation has been provided for this answer.

6,628.

Which of the following statements about Group VII elements is correct?

A.

they are present in the same physical state

B.

they are strong reducing agents

C.

their reactivity decreases down the group

D.

they exist as monoatomic molecules

Correct answer is C

No explanation has been provided for this answer.

6,629.

Elements with high ionization energies would-------

A.

lose electrons easily

B.

have large atomic radii

C.

have high effective nuclear charges

D.

have low atomic numbers

Correct answer is C

No explanation has been provided for this answer.

6,630.

The collision between ideal gas molecules are considered to be perfectly elastic because

A.

they collide without losing energy

B.

they move randomly in a straight line

C.

their average kinetic energy is variable

D.

the distance between them is large compared to their size

Correct answer is A

No explanation has been provided for this answer.