Post Utme Chemistry Past Questions and Answers

Question 521:

The product of the electrolysis of dilute sodium hydroxide using platinum electrodes are ____________

A. Hydrogen and oxygen gases
B. Water and hydrogen gases
C. Water and sodium metal
D. Sodium metal and hydrogen gas

Question 522:

Tetraoxosulphate(vi) acid burns the skin by ____________

A. Hydrolysis
B. Hydration
C. Heating
D. Dehydration

Question 523:

25Cm³ of a 0.2 moldm^-3 solution of Na2CO3 requires 20cm³ of a solution of HCL for neutralization.
The concentration of HCL solution is ____________

A. 0.5 moldm^-3
B. 0.6 mold^-3
C. 0.2 moldm^-3
D. 0.4 moldm^-3

Question 524:

The property which makes alcohol soluble in water is the ____________

A. Boiling point
B. Hydrogen bonding
C. Ionic character
D. Covalent nature

Question 525:

The gas that gives brown coloration in brown ring test is ____________

A. NO
B. CO²
C. NO²
D. CO