acid base salt

When CO₂ is passed through lime water, it turns milky. the milkiness in due to formation of

• H₂ O

• CaCO₃

• CaO

• CO₂

1. Which of the following acid is present in sour milk?

• Lactic acid

• tartaric acid

• glycolic acid

• citrus acid

Incorrect statement about acids is/are

• they have bitter taste

• they changes the colour or red litmus to blue

• they changes the colour or blue litmus to red

• all above

When aqueous sodium carbonate (Na₂CO₃) with HCl(aq), it gives

• (a) NaOH, H₂ (g) and CO₂(g)

• (b) NaCl, H₂ O and CO₂(g)

• (c) NaHCO₃, H₂ (g) and CO₂(g)

• (d) NaHCO₃, H₂ O and CO₂(g)

Chemical formula of baking soda is-

• NaHCO₃

• NaCO₃

• MgSO₄

• MgCO₃

Antacids contain

• weak base

• Strong base

• Strong acid

• weak acid

Plaster of Paris hardens by-

• (a) giving of CO₂

• (b) changing into CaCO₃

• (c) combining with water

• (d) giving out water

1. Three acidic solutions A, B and C have pH = 0, 3 and 5 respectively. Which solution has the highest concentration of H+ ions?

• A

• B

• C

• don't know

NaHCO₃ on heating gives

• Na₂CO₃ + CO₂ + H₂O

• Na₂CO₃ + CO₂

• Na₂CO₃ + H₂O

• Na₂CO₃

When NaOH and HCl are mixed in equal molar quantities, the result is

• (a) the formation of salt +H₂O

• (b) the formation of salt +H₂(g)

• (c) the formation of salt +O₂(g)

• (d) All above are correct