Jamb Chemistry Past Questions and Answers

Question 2101:

• JAMB 2019

Which of the following could not be alkane?

A. C\(_4\)H\(_{10}\)
B. C\(_5\)H\(_{12}\)
C. C\(_7\)H\(_{14}\)
D. C\(_8\)H\(_{18}\)

Question 2102:

• JAMB 2019

The electronic configuration of element Z is 1s\(^2\) 2s\(^2\) 2p\(^6\) 3s\(^2\) 3p\(^1\). What is the formula of the compound formed between Z and tetraoxosulphate (VI) ion.

A. Z\(_3\)(SO\(_4\))\(_2\)
B. ZSO\(_4\)
C. Z\(_2\) SO\(_4\)
D. Z\(_2\)(SO\(_4\))\(_3\)

Question 2103:

• JAMB 2019

The hybridization in the compound \(CH_3 - CH_2 - C \equiv H\) is

A. Sp\(^3\) and sp
B. Sp
C. Sp\(^2\)
D. Sp\(^3\) and sp\(^2\)

Question 2104:

• JAMB 2019

The following are isoelectronic ions except

A. Na\(^+\)
B. Mg\(^{2+}\)
C. Si\(^{2+}\)
D. O\(^{2+}\)

Question 2105:

• JAMB 2019

Consider the reaction: A + 2B\(_{(g)} \rightleftharpoons \) 2C + D\(_{(g)}\) (\(\Delta\)H = +ve)
What will be the effect of decrease in temperature on the reaction?

A. Rate of backward reaction will increase
B. The equilibrium constant will shift
C. Rates of forward and backward reactions are not affected
D. Rate of forward reaction will increase