Chemistry Past Questions and Answers

Figure 1 above shows part of the periodic Table which of the elements belongs to the p-block?

A S, T and U
B V, W and X
C S and T only
D P, Q and R
E V, W, X and S

Question 422:

The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. At room temperature (300 K)

A Y is twice as soluble as X
B X is twice as soluble as Y
C X and Y are soluble to the same extent
D X is three times as soluble as Y
E Y is three times as soluble as X

Question 423:

The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. If 80 g each of X and Y are taken up in 100 g of water at 353 K we shall have

A Only 10g of X undissolved
B Only 16 g of Y undissolved
C 10 g of X and 16 g of Y undissolved
D All X and Y dissolved
E All X and Y undissolved

Question 424:

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

Question 425:

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