Match the following: a. Calcium hydroxide i Milk of magnesia b. Potassium hydroxide ii Caustic soda c. Sodium hydroxide iii Caustic potash d. Magnesium hydroxide iv Household cleaners e. Ammonium hydroxide v Slaked lime

a) Slaked lime is added to soil to reduce the acidity of soil. Slaked lime is also known as calcium hydroxide. It is a base. b) Potassium hydroxide is also known as caustic potash. It is a strong base because in water it dissociates completely. c) Sodium hydroxide is also known as caustic soda. It is an ionic compound that contains cation ( Na + ) and anion ( OH - ) . d) Milk of magnesia is also known as magnesium hydroxide. It is used for neutralizing the effect of HCl in the stomach. e) Ammonium hydroxide is used as a cleaning agent. It is also known as ammonia water and ammonia solution. a) Calcium hydroxide v) Slaked lime b) Potassium hydroxide iii) Caustic potash c) Sodium hydroxide ii) Caustic soda d) Magnesium hydroxide i) Milk of magnesia e) Ammonium hydroxide iv) Household cleaners

E M B I B E

Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>ASSESSMENT ZONE>Q F

HARD

7th CBSE

IMPORTANT

Earn 100

Phenolphthalein when added to a liquid $X$ did not show any colour change. Mention $2$ inferences drawn from this activity.

Important Questions on Acids, Bases and Salts

MEDIUM

7th CBSE

IMPORTANT

Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>TRACK YOUR PROGRESS>Q 1

Hydrochloric acid + Iron ➔_____ + Hydrogen gas.

EASY

7th CBSE

IMPORTANT

Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>TRACK YOUR PROGRESS>Q 2

Name the acid which is used in the manufacture of Rayon.

EASY

7th CBSE

IMPORTANT

Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>TRACK YOUR PROGRESS>Q 2

Name the acid which is used in the manufacture of rocket fuel. (Hydrochloric acid/ Nitric acid)

EASY

7th CBSE

IMPORTANT

Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>TRACK YOUR PROGRESS>Q 2

Name the acid which is used in the manufacture of PVC. (Nitric acid/Hydrochloric acid)

EASY

7th CBSE

IMPORTANT

Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>TRACK YOUR PROGRESS>Q 3

A

pH < 7

indicates the solution is a/an _____.

EASY

7th CBSE

IMPORTANT

Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>TRACK YOUR PROGRESS>Q 3

A pH

> 7

indicates the solution is a/an _____.

EASY

7th CBSE

IMPORTANT

Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>TRACK YOUR PROGRESS>Q 3

A neutral solution has a pH _____. (Write answer in number(s))

EASY

7th CBSE

IMPORTANT

Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>TRACK YOUR PROGRESS>Q 4

Match the following:

a.	Calcium hydroxide	i	Milk of magnesia
b.	Potassium hydroxide	ii	Caustic soda
c.	Sodium hydroxide	iii	Caustic potash
d.	Magnesium hydroxide	iv	Household cleaners
e.	Ammonium hydroxide	v	Slaked lime