Post Utme Biology Past Questions and Answers

Question 796:

Which of the following is used as water softener?

A. \(Na_2CO_3. 10H_20\)
B. \(CuSO_4\)
C. \(mgSO_4 7H_20\)
D. \(CaCl_2. 2H_20\)
E. \(Na2SO,4. 10H_2O\)

Question 797:

What is the percentage by weight of calcium by Ca(OCl)2? (Ca=40, C=35.5, O=16)

A. 28%
B. 31.6%
C. 43.8%
D. 44.5%
E. 90.3%

Question 798:

Which of the following gases is lighter than air?

A. HCL
B. \(CO_2\)
C. \(SO_2\)
D. \(NH_3\)
E. All of the above

Question 799:

What is the value -14°C on the kelvin temperature scale?

A. 295°K
B. 278°K
C. 259°K
D. 278°K
E. 259°K

Question 800:

Lead and tin are the components of _____________

A. Steel
B. Bronze
C. Brass
D. Dentists amalgam
E. Soft solder