S1-Q13- 1st term general exam

the table provided shows the solubility of some salts in water at constant temperature .Which salt has the least solubility ?

• X

• Y

• W

• Z

The pH of 0.1 M solution of sulphuric acid is ----------

• 0.2

• 0.4

• 0.7

• 4

0.001 M solution of HCl has pOH value which is equal to ------

• 3

• 1

• 13

• 11

all the following are forming neutral solutions except --------

• potassium nitrate

• sodium chloride

• ammonium acetate

• ammonium chloride

Blue litmus solution turns red in the hydrolysis of ------

• ammonium acetate

• sodium carbonate

• ammonium carbonate

• ammonium chloride

the graph ---- represents the change in pH value on adding excess of

hydrochloric acid to sodium hydroxide solution

• A

• B

• C

• D

Adding 300 ml of 1M phosphoric acid to 300 ml of 1M NaOH change the

colour of litmus solution to ----

• red

• blue

• violet

• green

The mass ratio between carbon and hydrogen atoms respectively in the

methane molecule CH₄ is ---------------- [C=12; H=1]

• 4:1

• 3:1

• 1:4

• 1:3

Mass percentage % of carbon in acetic acid is -------- [C=12 ; H=1; O=16]

• 40%

• 20%

• 12%

• 80%

What is the mass of hydrochloric acid required to neutralize 22 ml of 0.11M sodium carbonate solution? [H=1; Cl=35.5]

• 0.08833g

• 176.66g

• 0.177g

• 0.172g