Neco Chemistry Past Questions and Answers

Question 161:

• NECO 2009

Which of the following compounds will undergo thermal dissociation?

A. AgCl
B. CaCO₃
C. K₂S0₄
D. NaOH
E. NH₄CI

Question 162:

• NECO 2009

Which of the following gases will bleach moist litmus paper?

A. Cl₂
B. CO₂
C. HCl
D. N₂O
E. SO₃

Question 163:

• 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 164:

• NECO 2009

Which of these compounds has the greatest ionic character?

A. AlF₃
B. BF₂
C. CF₄
D. CsF
E. NaF

Question 165:

• 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