Neco Chemistry 2009 Past Questions and Answers

Question 41:

• NECO 2009

Which of the following gases will bleach moist litmus paper?

A. Cl₂
B. CO₂
C. HCl
D. N₂O
E. SO₃

Question 42:

• NECO 2009

What kind of bond exist between carbon and oxygen in C0₃ ^2-?

A. Co- ordinate Covalent
B. Covalent
C. Electrovalent
D. Metallic
E. Van der Waal forces

Question 43:

• NECO 2009

Which of these compounds has the greatest ionic character?

A. AlF₃
B. BF₂
C. CF₄
D. CsF
E. NaF

Question 44:

• NECO 2009

\( ^{235}_{92}U + ^1_0n → ^{145}_{56}Ba + ^{88}_{36}Kr + 3^1_0n + Energy \)

The equation above represent a/an ____________

A. Alpha particle emission
B. Endothermic reaction
C. Nuclear fission
D. Nuclear fusion
E. Thermal dissociation

Question 45:

• NECO 2009

A neon atom is chemically nonreactive because ____________

A. The electrons at the outermost shell is partially filled
B. The number of protons equals the number of electrons
C. The outer electron shell is completely filled
D. There are equal number of protons and neutrons in its nucleus
E. There are no elections at the outermost shell