The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. If the molar mass of X is 36 g, the number of moles of X dissolved at 343 K is

A. 0.2 moles

B. 0.7 moles

C. 1.5 moles

D. 2.0 moles

E. 3.0 moles

Use the above options to the question. The products formed on hydrolysis of

A. A

B. B

C. C

D. D

E. E

The oxidation of

A. 2-butanone

B. 2-butanal

C. butane

D. butanoic acid

E. 3-butanal

The I.U.P.A.C name for the compound

A. 2-methyl-3-pentene

B. 4-methyl-2-pentane

C. 2-methyl-2-pentene

D. 4-methylpent-2-ene

E. 2-methyl-3-pentane

Which of the following is the functional group of carboxylic acids?

A. A

B. B

C. C

D. D

E. E

Which of the following conduct electricity?

A. sulfur

B. graphite

C. diamond

D. red phosphorus

E. yellow phosphorus

An organic compound contains 72% carbon, 12% hydrogen and 16% oxygen by mass. The empirical formula of the compound is

A. C₈H₂₂O₃

B. C₆H₁₀O₃

C. C₁₂H₁₂O

D. C₆H₁₂O

E. C₃H₆O

0.499g 0f CuSO₄.xH₂O when heated to constant weight gave a residue of 0.346g. the value of x is? (Cu = 63.5, S = 32.0, O = 16, H = 1)

A. 0.5

B. 2.0

C. 3.0

D. 4.0

E. 5.0

In the experiment, which of the following observations would suggest that a solid sample is a mixture? The

A. solid can be ground to a fine powder

B. density of the solid is 2.25gdm^-3

C. solid begins to melt at 573k but is not completely melted until 648k

D. solid absorbs moisture from the atmosphere and turns into liquid

E. solid melts at 300k

Hydrogen diffuses through a porous plug

A. at the same rate as oxygen

B. at a slower rate than oxygen

C. twice as fast as oxygen

D. three times as fast as oxygen

E. four times as fast as oxygen