43
In the reaction E+F ↔ G+H, the backward reaction is favoured if the concentration of
- A. F is increased
- B. E is increased
- C. E is reduced
- D. G is reduced
44
The chromatography separation of ink is based on the ability of the components to
- A. React with solvent
- B. React with each other
- C. Dissolve in each other in the column
- D. Move at different speeds in the column
45
A little quantity of trichloromethane (b.pt 60,oC) was added to a large quantity of ethanol (b.pt 78,oC). The most probable boiling point of the resultant mixture is from
- A. 69 oC - 70 oC
- B. 70 oC – 74 oC
- C. 82 oC – 84 oC
- D. 60 oC – 78 oC
46
The formula CH\(_2\)O for ethanoic acid is regarded as its
- A. Molecular formula
- B. General formula
- C. Empirical formula
- D. Structural formula
47
A compound contains 31.91% potassium, 28.93% chlorine and the rest oxygen. What is the chemical formula of the compound?
[K = 39, Cl = 35.5, O = 16]
- A. KClO4
- B. KClO
- C. KClO2
- D. KClO3