V K Sally and S K Aggarwal Solutions for Chapter: Acids, Bases and Salts, Exercise 2: EXERCISES
V K Sally Science Solutions for Exercise - V K Sally and S K Aggarwal Solutions for Chapter: Acids, Bases and Salts, Exercise 2: EXERCISES
Attempt the practice questions on Chapter 5: Acids, Bases and Salts, Exercise 2: EXERCISES with hints and solutions to strengthen your understanding. Learning Elementary Science for Class 7 solutions are prepared by Experienced Embibe Experts.
Questions from V K Sally and S K Aggarwal Solutions for Chapter: Acids, Bases and Salts, Exercise 2: EXERCISES with Hints & Solutions
Most of the fruits contain organic acids.
What are neutral substances? Give examples of two neutral substances.
Pritam had an agricultural plot. He used to grow vegetables in it. After harvesting he ploughed the plot, never removed the roots of previous crop. In few years his land became infertile. When Saurabh learnt his problem, he advised him to spray lime powder in plot to make the soil fertile. Now the plot becomes fertile and Pritam thanks Saurabh for his good advice.
Answer the following questions based on above information:
What are values displayed by Saurabh?
Pritam had an agricultural plot. He used to grow vegetables in it. After harvesting he ploughed the plot, never removed the roots of previous crop. In few years his land became infertile. When Saurabh learnt his problem, he advised him to spray lime powder in plot to make the soil fertile. Now the plot becomes fertile and Pritam thanks Saurabh for his good advice.
Answer the following questions based on above information
Why did the agricultural plot become infertile?
Pritam had an agricultural plot. He used to grow vegetables in it. After harvesting he ploughed the plot, never removed the roots of previous crop. In few years his land became infertile. When Saurabh learnt his problem, he advised him to spray lime powder in plot to make the soil fertile. Now the plot becomes fertile and Pritam thanks Saurabh for his good advice.
Answer the following questions based on above information
How does the lime help in restoring fertility of plot?
Rajesh is a milk vendor. He used to collect milk from the villages and sell in cities. In summer he noticed his milk used to get sour. This caused him heavy loss. Rakesh learnt it, then he advised him to add small amount of baking soda in the milk to prevent it from getting sour. Rajesh became happy and thanked Rakesh for his good advice.
Answer the following questions based on above information:
What are the values shown by Rakesh in giving such advice?
Rajesh is a milk vendor. He used to collect milk from the villages and sell in cities. In summer he noticed his milk used to get sour. This caused him heavy loss. Rakesh learnt it, then he advised him to add small amount of baking soda in the milk to prevent it from getting sour. Rajesh became happy and thanked Rakesh for his good advice.
Answer the following questions based on above information:
Why did milk get sour during summer?
Rajesh is a milk vendor. He used to collect milk from the villages and sell in cities. In summer he noticed his milk used to get sour. This caused him heavy loss. Rakesh learnt it, then he advised him to add small amount of baking soda in the milk to prevent it from getting sour. Rajesh became happy and thanked Rakesh for his good advice.
Answer the following questions based on above information
How did baking soda prevent milk from getting sour?
