Gr 9 NATURAL SCIENCES: CH 2.6 Neutralisation and pH

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What is the pH of a neutral substance?

pH < 7

pH = 7 (correct)

pH = 1

pH > 7

What is the product of a neutralisation reaction?

Only water

Only an acid or a base

Only a salt

Water and a salt (correct)

Which of the following is a strong acid?

H₂O

H₂SO₄ (correct)

HCl (correct)

HNO₃ (correct)

What is the purpose of a universal indicator?

To measure the pH of a solution (C) Signup and view all the answers

What happens when an acid and a base are mixed?

They neutralise each other (D) Signup and view all the answers

What is the consequence of acid rain on plant life?

It damages plant life (B) Signup and view all the answers

Which of the following metal compounds form acidic solutions in water?

Non-metal oxides (B) Signup and view all the answers

What is the pH of metal compounds in water?

pH > 7 (D) Signup and view all the answers

What is the general formula for metal oxides of Group 2?

MO (D) Signup and view all the answers

What is the result of dissolving CO₂ in rainwater?

Forming a acidic solution (A) Signup and view all the answers

What is the primary process by which acid rain is formed?

The dissolution of non-metal oxides in rainwater (D) Signup and view all the answers

Which of the following metal compounds typically form basic solutions in water?

Metal oxides, hydroxides, and carbonates (C) Signup and view all the answers

What is the general formula for metal hydroxides of Group 1?

MOH (C) Signup and view all the answers

What is the result of dissolving a non-metal oxide in water?

An acidic solution is formed (B) Signup and view all the answers

What is a common consequence of acid rain?

The corrosion of buildings and monuments (C) Signup and view all the answers

What is the typical range of pH values for weak bases?

pH 8-10 (B) Signup and view all the answers

What is the purpose of using a glass rod or straw in the experiment?

To transfer a drop of each solution to the indicator paper (B) Signup and view all the answers

What happens to the acidity of an acid during a neutralisation reaction?

It decreases (C) Signup and view all the answers

Which of the following laboratory acids is NOT a common laboratory acid?

Carbonic acid (H₂CO₃) (A) Signup and view all the answers

What is the result of dissolving non-metal oxides in water?

They form acids (A) Signup and view all the answers

Which of the following statements about acid rain is correct?

It is formed when non-metal oxides dissolve in rainwater, creating acidic solutions. (A) Signup and view all the answers

Which of the following metal compounds would form a basic solution with a pH greater than 7?

Na₂O (A), CaCO₃ (C) Signup and view all the answers

What is the product of the reaction between CO₂ and H₂O?

H₂CO₃ (carbonic acid) (A) Signup and view all the answers

Which of the following metal compounds would NOT form a basic solution in water?

SO₂ (sulfur dioxide) (D) Signup and view all the answers

What is the general formula for metal carbonates of Group 1?

M₂CO₃ (B) Signup and view all the answers

What is the pH range of a solution that is considered weakly acidic?

pH 4-6 (C) Signup and view all the answers

Which of the following is an example of a neutralisation reaction?

HCl + NaOH → NaCl + H₂O (B) Signup and view all the answers

What is the result of mixing a strong acid with a weak base?

A strongly acidic solution is formed (B) Signup and view all the answers

Which of the following is NOT a characteristic of a neutralisation reaction?

The pH of the solution remains the same (A) Signup and view all the answers

What is the purpose of using a universal indicator in the experiment?

To measure the pH of a solution (B) Signup and view all the answers