Neco Chemistry Past Questions and Answers

Question 131:

• NECO 2009

Two elements X and Y with electronic configurations 2,8,2 and 2,8,7 respectively, are likely to combine by ____________ bonding

A. Covalent
B. Dative
C. Electrovalent
D. Hydrogen
E. Metallic

Question 132:

• NECO 2009

The Ideal Gas Law is expressed mathematically as ____________

A. P1 /T1 = P2/T2
B. P1/V1 = P2V2
C. PV =nRT
D. PV =KT
E. V1/T1 = V2/T2

Question 133:

• NECO 2009

Non-polar molecules are held together by ____________

A. Co-ordinate bond
B. Covalent bond
C. Electromagnetic force
D. Hydrogen bond
E. Van der Waals forces

Question 134:

• NECO 2009

Which of the following salt solutions will have a pH greater than 7?

A. NaCl
B. NaHSO₄
C. Na₂CO₄
D. Na₂SO₄
E. MgCl₂

Question 135:

• NECO 2009

The relationship between equilibrium constant and free energy change is represented as ____________

A. δ G ° =-nFE °
B. δG °-RT ln K
C. δ G °= + RT In k
D. δG ° = δH – T S
E. H=TδS