NECO Past Questions and Answers - Page 89

441.

What type of bond holds hydrogen fluoride molecules together when forming larger aggregate?

A.

Covalent

B.

Dative

C.

Hydrogen

D.

Ionic

E.

Metallic

Correct answer is C

No explanation has been provided for this answer.

442.

If two metallic ions of the same concentration migrate to a graphite cathode, the one that would be preferentially discharged is that with the

A.

greater stability in solution

B.

lower electrical charge

C.

smaller mass

D.

stronger tendency to accept electrons

E.

stronger tendency to lose electrons.

Correct answer is D

In an electrolytic cell, when two metallic ions of the same concentration migrate to a graphite cathode, the one that would be preferentially discharged is the one that has the stronger tendency to accept electrons and become a neutral atom.

443.

The planet with the highest number of moon is

A.

Earth

B.

Jupiter

C.

Uranus

D.

Pluto

E.

Venus

Correct answer is B

The planet with the most moons in the Solar System is Jupiter, with a total of 63 confirmed moons (as of 2009).

444.

The rate of a chemical reaction is NOT affected by one of these factors

A.

colour

B.

concentration

C.

presence of light

D.

surface area

E.

temperature

Correct answer is A

No explanation has been provided for this answer.

445.

The molecular formula of ethylbutanoate is?

A.

CH5COOC26

B.

C3HCOOC2H7

C.

C3H7COOC3H7

D.

C3H7COOC4H9

E.

C3H7COOC2H5

Correct answer is E

No explanation has been provided for this answer.