5. Acids, Bases and Salts Class 7 Science [LATEST] Solutions Assignment in English - CBSE Study
NCERT Solutions for Class 7 Science are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important 5. Acids, Bases and Salts with detailed explanations and step-by-step answers for better exam preparation. Each Assignment is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 7 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Science.
Class 7 English Medium Science All Chapters:
5. Acids, Bases and Salts
4. Assignment
Extra Question:
Que: What is the testy for acids and bases using litmus paper?
Ans: Acids turn blue litmus paper red while bases turn red litmus paper blue.
Que: What name is given to those to those substances which do not change the color of either red or blue litums paper?
Ans: The solutions or substances which do not change the color of either red or blue litmus paper are meutral.
Que: Write the name of two indicators which occur naturally?
Ans:
- Turmeric
- China rose
Que: Name the acid present in lemon juice and tomato?
Ans: Citric acid in lemon juice and oxalic acid in tomato.
Que: Name a substance which is used to cure the discomfort caused by indigestion due to over eating?
Ans: Milk of magnesia which contains magnesium hydroxide is used to neutralise the effect of excessive acid in stomach.
Que: Is time water an acidic or basic solution?
Ans: Lime water is basic solution.
Que: Name the reaction when an acid is mixed with base.
Ans: Neutralisation reaction.
Que: Which acid is injected into our body an ant sting that causes pain?
Ans: The acid is formic acid which is injected into the skin of a person when an ant bites.
Que: Write twi basic substances which we use in our daily life?
Ans:
- baking soda
- Soap or detergent
Que: Name one acid which is responsible for acid rain.
Ans: Carbonic acid.
Que: Why are sodium bicarbonate and lemon used during indigestion?
Ans: Sodium bicarbonate neutralises the acidity in the stomach. Hence, it is used during indigestion. Lemon contains acid. It reacts with undigested food and suffers it.
Que: How lime water is prepared in the laboratory?
Ans: To prepare lime water, disslove some lime in water in a bottle. Stir the solution and keep it for sometime. pour a little from the top. This is lime water.
Que: Which is an acid - base indicator?
Ans: Turmeric.
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