Year : 
2021
Title : 
Chemistry
Exam : 
WASSCE/WAEC MAY/JUNE

Paper 1 | Objectives

21 - 30 of 50 Questions

# Question Ans
21.

Under which conditions of pressure (p) and temperature (T) would the volume of an inflated ballon increase? When

A. P and T are increased

B. both T and P are decreased

C. T is increased and P is decreased

D. T is decreased and P is increased

C

22.

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

A

23.

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

C

24.

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

C

Consider the following diagram and use it to answer the question below.
--missing photo--

25.

Which of the following cell notations represent the diagram

A. B\(^{2}\)+/B/ /A/A\(^{3+}\)

B. A\(^{3+}\) /A/ /B/B\(^{2+}\)

C. B/B\(^{2+}\)/ /A/\(^{3+}\)

D. A/A\(^{3+}\)/ /B\(^{2+}\)/B

D

26.

Which of the following half reaction equations represent the reaction at the cathode

A. A\(^{3+_{(aq)}}\)+3e\(^{-}\) \(\rightarrow\) A\(_{(s)}\)

B. B\(^{2+_{(aq)}}\)+2e\(^{-}\) \(\rightarrow\) B\(_{(s)}\)

C. A\(_{(s)}\) \(\rightarrow\) \(^{3+_{(aq)}}\)+3e\(^{-}\)

D. B\(_{(s)}\) \(\rightarrow\) B\(^{2+_{(aq)}}\) + 2e\(^{-}\)

B

27.

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

A

28.

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

C

29.

The Bohr model of the atom proposed the existence of

A. the nucleus

B. electron shells

C. nucleons

D. neutrons

B

30.

The 25°C evaporation of a 100 cm\(^{3}\) solution of K\(_{2}\)CO\(_{3}\) to dryness gave 14g of the salt. What is the solubility of K\(_{2}\)CO\(_{3}\) at 25°25C? [K\(_{2}\)CO\(_{3}\) = 138]

A. 0.01 mol dm\(^{-3}\)

B. 0.101 mol dm\(^{-3}\)

C. 1.01 mol dm \(^{-3}\)

D. 10.0 mol dm\(^{-3}\)

C

21.

Under which conditions of pressure (p) and temperature (T) would the volume of an inflated ballon increase? When

A. P and T are increased

B. both T and P are decreased

C. T is increased and P is decreased

D. T is decreased and P is increased

C

22.

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

A

23.

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

C

24.

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

C

Consider the following diagram and use it to answer the question below.
--missing photo--

25.

Which of the following cell notations represent the diagram

A. B\(^{2}\)+/B/ /A/A\(^{3+}\)

B. A\(^{3+}\) /A/ /B/B\(^{2+}\)

C. B/B\(^{2+}\)/ /A/\(^{3+}\)

D. A/A\(^{3+}\)/ /B\(^{2+}\)/B

D

26.

Which of the following half reaction equations represent the reaction at the cathode

A. A\(^{3+_{(aq)}}\)+3e\(^{-}\) \(\rightarrow\) A\(_{(s)}\)

B. B\(^{2+_{(aq)}}\)+2e\(^{-}\) \(\rightarrow\) B\(_{(s)}\)

C. A\(_{(s)}\) \(\rightarrow\) \(^{3+_{(aq)}}\)+3e\(^{-}\)

D. B\(_{(s)}\) \(\rightarrow\) B\(^{2+_{(aq)}}\) + 2e\(^{-}\)

B

27.

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

A

28.

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

C

29.

The Bohr model of the atom proposed the existence of

A. the nucleus

B. electron shells

C. nucleons

D. neutrons

B

30.

The 25°C evaporation of a 100 cm\(^{3}\) solution of K\(_{2}\)CO\(_{3}\) to dryness gave 14g of the salt. What is the solubility of K\(_{2}\)CO\(_{3}\) at 25°25C? [K\(_{2}\)CO\(_{3}\) = 138]

A. 0.01 mol dm\(^{-3}\)

B. 0.101 mol dm\(^{-3}\)

C. 1.01 mol dm \(^{-3}\)

D. 10.0 mol dm\(^{-3}\)

C