Jamb Chemistry Past Questions and Answers

Question 2221:

• JAMB 2022

Electrons enter into orbitals in order of increasing energy as exemplified by?

A. 1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^2\)2pz\(^0\)3s\(^0\)
B. 1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^1\)2pz\(^1\)3s\(^0\)
C. 1S\(^2\)2S\(^2\)2PX\(^1\)2py\(^1\)2pz\(^1\)3s\(^1\)
D. 1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^2\)2pz\(^0\)3s\(^1\)

Question 2222:

• JAMB 2022

Wrought iron is obtained by heating cast iron in a furnace with?

A. Magnetite
B. Haematite
C. Carbon(ii)oxide
D. Calcium trioxosilicate(iv)

Question 2223:

• JAMB 2022

In the extraction of iron, hot air is introduced into the blast furnace through?

A. Valves
B. Open-hearths
C. Arcs
D. Tuyeres

Question 2224:

• JAMB 2022

How many bonding pair are present in carbon(iv)oxide?

A. 4
B. 3
C. 2
D. 1

Question 2225:

• JAMB 2022

2-methylprop-1-ene is a structural isomer of?

A. But-1-yne
B. 2-methyl But-1-ene
C. 3-methyl prop-1-yne
D. But-2-ene