acid bases and salts

Hcl+____->Nacl+H20

• Mg0

• NaOH

• Fe

• C02

what are the products of neutralisation ?

• acid and a base

• water and salt

• salt and a base

• acid and water

Phenolphthalein is a synthetic indicator and its colours in

acidic and basic solutions, respectively are

• red and blue

• blue and yellow

• colorless and pink

• red and yellow

‘Litmus’, a natural dye is an extract of which of the following?

• China rose (Gudhal)

• Beetroot

• Lichen

• Blue berries (Jamun)

Neutralisation reaction is a

• physical and reversible change.

• physical change that cannot be reversed.

• chemical and reversible change.

• chemical change that cannot be reversed.

what type of change is this?

• chemical

• physical

Which of the following set of substances contain acids?

• Grapes, lime water

• Vinegar, soap

• Curd, milk of magnesia

• Curd, vinegar

On adding phenolphthalein indicator to a colourless solution,

no change is observed. What is the nature of this solution?

• Basic

• Either acidic or basic

• Either acidic or neutral

• Either basic or neutral

what is the nature of lime juice?​

• neutral

• basic

• acidic

All substances are either acidic or basic.

• true

• false