EduNinja

[Maximum number: 1]

Which statement about aqueous weak acids is correct?

A

Weak acids are always dilute aqueous solutions.

B

Weak acids dissociate fully in aqueous solution.

C

When a weak acid is added to blue litmus paper, it stays blue.

D

When a weak acid is added to solid magnesium, effervescence is seen.

[Maximum number: 1]

Which oxides are basic?
1 calcium oxide
2 sodium oxide
3 iron(II) oxide

A

1, 2 and 3

B

1 and 2 only

C

2 and 3 only

D

3 only

[Maximum number: 1]

What is the colour of thymolphthalein in dilute hydrochloric acid?

A

blue

B

red

C

yellow

D

colourless

[Maximum number: 1]

The equation for the reaction between barium chloride and dilute sulfuric acid is shown.

\mathrm{BaCl}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{BaSO}_{4}+2 \mathrm{HCl}

Which row shows the state symbols for this equation?

$\mathrm{BaCl}_{2}$

$\mathrm{H}_{2} \mathrm{SO}_{4}$

$\mathrm{BaSO}_{4}$

2 HCl

$(\mathrm{aq})$

$(\mathrm{s})$

$(\mathrm{aq})$

$(\mathrm{I})$

$(\mathrm{s})$

$(\mathrm{aq})$

$(\mathrm{I})$

$(\mathrm{aq})$

$(\mathrm{s})$

$(\mathrm{I})$

$(\mathrm{aq})$

$(\mathrm{I})$

$(\mathrm{aq})$

$(\mathrm{I})$

CAIE IGCSE Chemistry 7 Acids Bases and Salts Topic Practice

Question 1

Question 2

Question 3

Question 4