Question 1: The acid present in lemon and orange is

HCl
tartaric acid
citric acid
Acetic acid

Question 2: What happens when a litmus paper is dipped in basic solution?

Blue to red
Red to blue
No change
Blue to colourless

Question 3: Select the correct statement regarding Arrhenius concept of acids.

Acids donate OH-ion
Acids donates protons
Acids donates H+ions in Aqueous solutions
Acids donate OH-ions in aqueous solution

Question 4: Arrhenius concept cannot explain the basicity of the following substance?

NaOH
KOH
NH4OH
NH3

Question 5: According to the Bronsted and Lowry concept of base is

Proton acceptor
Proton donor
Hydroxyl ion acceptor
Hydroxyl ion donor