Which of the following pH values is likely to be that of a slightly alkaline solution?

A. 2

B. 5

C. 7

D. 8

E. 13

Which of the following minerals contains flurine as one of its constituent elements?

A. Cryolite

B. Bauxite

C. Potash alum

D. Kaolin

E. Mica

The product of the reaction between propanoic acid and ethanol is

A. prophlmethanoate

B. ethylethanoate

C. methylpropanoate

D. propylethanoate

E. ethylpropanoate

Which of the following groups contains entirely linear molecules?

A. H ₂NH₃O ₂

B. CO₂NH _{3 2}

C. H ₂CH₄N₂

D. CO₂H₂N₂

E. CH ₄O ₂CO ₂

What is the value of n in the following equation? XO-₄ +8H ⁺ + ne- → X^{2 +} + 4H₂O

A. 2

B. 3

C. 4

D. 5

E. 6

A dye is suspected to have contaminated a lollipop. Which of the following is the best method by which the contaminant may be isolated?

A. Fractional distillational

B. Recrystallization

C. Filtration

D. Paper chromatography

E. Evaporation

Which of the following accounts for the difference in the mode of conduction of electricity by metals and aqueous salt solutions?

A. Electrons are present in metals but not in salt solutions

B. Metals are conductors while salts are electrolytes

C. Electricity is carried by mobile elrctrons in metals but by ions is aqueous salt solution

D. salts ionize in aqueous solutions while metals do not

E. Metals are reducing agents while salts are not