Jamb Chemistry Past Questions and Answers

Question 1506:

• JAMB 2009

If an atom is represented as \( _{11}^{23}X \), which of the following deduction is correct?

A. It contains 12 protonic
B. It forms a covalent chloride
C. Its atomic number is 23
D. It is an alkali metal

Question 1507:

• JAMB 2009

Cathode rays causes an object placed behind a perforated anode to cast a shadow on the screen. This observation shows that the rays

A. Are positively charged
B. Are negatively charged
C. Have mass
D. Travel in straight lines

Question 1508:

• JAMB 2009

Which quantum number divides shells into orbitals?

A. Principal
B. Arzimuthal
C. Magnetic
D. Spin

Question 1509:

• JAMB 2009

The type of bonding in {Cu(NH₃)₄}²⁺ is

A. Coordinate
B. Electrovalent
C. Metallic
D. Covalent

Question 1510:

• JAMB 2009

The mixture of gases used in a photographer's flash tube is

A. Argon and krypton
B. Krypton and xenon
C. Helium and argon
D. Argon and xenon