Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.

Write word equations and then balanced equations for the reaction taking place when – (a) dilute sulphuric acid reacts with zinc granules.

Write word equations and then balanced equations for the reaction taking place when – (c) dilute sulphuric acid reacts with aluminium powder.

Write word equations and then balanced equations for the reaction taking place when – (b) dilute hydrochloric acid reacts with magnesium ribbon.

Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (b) strongly alkaline?

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains

Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (c) strongly acidic?

A compound if acidic will turn all indicators red.

Equal lengths of magnesium ribbons are taken in test tubes $A$ and $B$. Hydrochloric acid ($HCl$) is added to test tube $A$, while acetic acid ($CH_3COOH$) is added to test tube $B$. Amount and concentration taken for both the acids are same. In which test tube will the fizzing occur more vigorously and why?

Why do acids not show acidic behaviour in the absence of water?

Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Arrange the pH in increasing order of hydrogen-ion concentration.

Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (a) neutral?

Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (e) weakly alkaline?

A solution turns red litmus blue, its pH is likely to be

Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (d) weakly acidic?

A milkman adds a very small amount of baking soda to fresh milk. (b) Why does this milk take a long time to set as curd?

Which of following set of substances contain acids?

Plaster of Paris should be stored in a moisture-proof container. Explain why?

Litmus a natural dye is an extract of 

Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.