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  • Mark 'T' if the statement is true and 'F' if it is false:Nitric acid turn red litmus blue. (T/F)

6. Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) Nitric acid turn red litmus blue. (T/F)

(ii) Sodium hydroxide turns blue litmus red. (T/F)

(iii) Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water. (T/F)

(iv) Indicator is a substance which shows different colours in acidic and basic solutions. (T/F)

(v) Tooth decay is caused by the presence of a base. (T/F)

Answers (1)

best_answer

(i) FALSE 

Nitric acid is an acid and turns blue litmus red, not the other way around.

(ii) FALSE 

Sodium hydroxide is a base and turns red litmus blue, not blue litmus red.

(iii) TRUE

This is a neutralization reaction where the acid and base react to produce water and a salt (sodium chloride).

(iv) TRUE 

Indicators like litmus, phenolphthalein, and methyl orange change color depending on the pH of the solution.

(v) FALSE

Tooth decay is caused by acids produced by bacteria breaking down food particles in the mouth.

 

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Riya

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