Jamb Chemistry Past Questions and Answers

Question 2161:

• JAMB 2020

The general formula for the Alkanals is?

A. R\(_2\)CO
B. RCHO
C. ROH
D. RCOOR

Question 2162:

• JAMB 2020

When cathode rays are deflected onto the electrode of an electrometer, the instrument becomes?

A. Bipolar
B. Negatively charged
C. Positively charged
D. Neutral

Question 2163:

• JAMB 2020

When a solid substance disappears completely as a gas on heating, the substance is said to have undergone?

A. Sublimation
B. Crystallization
C. Distillation
D. Evaporation

Question 2164:

• JAMB 2020

An electron can be added to a halogen atom to form a halide ion with?

A. 8 valence electrons
B. 7 valence electrons
C. 2 valence electrons
D. 3 valence electrons

Question 2165:

• JAMB 2020

Aluminum hydroxide is used in the dyeing industry as a?

A. Dye
B. Dispersant
C. Salt
D. Mordant