HARD
7th CBSE
IMPORTANT
Earn 100

Two of the most commonly used salts are Sodium chloride NaCl and Sodium bicarbonate NaHCO3 Find out which of these is used (i) as baking powder (ii) as a preservative in pickles and in preserving meat and fish and also think of the reasons for doing so.

Important Questions on Acids, Bases and Salts

HARD
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 5 - Acids, Bases and Salts>Let's revise>Q 2
Why has Taj Mahal, a great Indian monument, turned yellow from pure white?
EASY
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 5 - Acids, Bases and Salts>Let's revise>Q A
Complete the following analogy:
Acidity : Antacid :: Insect bite : _____
EASY
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 5 - Acids, Bases and Salts>Let's revise>Q A
Complete the following analogy:
Acidic soil: Quick lime :: Alkaline soil: _____.
EASY
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 5 - Acids, Bases and Salts>Let's revise>Q A
Complete the following analogy:
Ant’s sting : Formic acid :: Lemon : _____
MEDIUM
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 5 - Acids, Bases and Salts>Let's revise>Q B

Read the passage below:


An organic compound with acidic properties is known as organic acid. Most common organic acid is carboxylic acid. Its acidity is due to the carbon group (-COOH) present in it. Generally, organic acids are weak acid and do not dissociate completely in water. Lower molecular acids however are miscible in water. Organic acids are commonly used to preserve food because of their effect on bacteria. They penetrate the bacterial cell wall and disrupt the cell. Salt of lactic acid such as sodium lactate and potassium lactate are widely used as antimicrobials in the food industry.

Answer the following questions by choosing the correct option given below:

The acidic property of carboxylic acid is due to the presence of:

EASY
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 5 - Acids, Bases and Salts>Let's revise>Q B
Read the passage below:
An organic compound with acidic properties is known as organic acid. Most common organic acid is carboxylic acid. Its acidity is due to the carbon group (-COOH) present in it. Generally, organic acids are weak acid and do not dissociate completely in water. Lower molecular acids however are miscible in water. Organic acids are commonly used to preserve food because of their effect on bacteria. They penetrate the bacterial cell wall and disrupt the cell. Salt of lactic acid such as sodium lactate and potassium lactate are widely used as antimicrobials in the food industry.
Answer the following question by choosing the correct option given below:
Sodium lactate is a salt of:
MEDIUM
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 5 - Acids, Bases and Salts>Let's revise>VE
Read the text and answer the question:
Mrs Lal has a large garden. She ensures that all the organic kitchen waste is added to a compost pit, dug in one corner of the garden. She segregates other wastes before disposing them. What value does Mrs Lal exhibits.