Class X Acids and bases

Naturally occuring acid

• HCl

• Sulphuric acid

• Citric acid

• Salt

Tartaric acid is present in

• tomato

• orange

• curd

• tamarind

Base

• CH3COOH

• NaOH

• CH4

• CaCO3

Metal

• Sulphur

• Silicon

• Tin

• None of these

Most reactive metal

• K

• Ca

• Na

• S

Lime water is chemically

• Calcium hydroxide

• KOH

• CaO

• CaCO3

What is common for acids?

• OH

• H+

• CO2

• none of these

Non metal placed in activity series

• He

• N

• Na

• H

Which among these would turn red litmus blue

• Mg(OH)2

• HNO3

• HCl

• H20

Indicator

• litmus

• methyl orange

• phenolphthalein

• all of these