Neutralisation reaction is a

Lemon juice and vinegar taste _________ because they contain __________

Phenolphthalein gives ___________ colour with lime water.

Acid + Metal⟶ Salt +_____________.

Bases turn turmeric_______________.

Lemon water is basic in nature.

Name two substances which changes red litmus blue.

What are deliquescent salts?

What are organic acids?

Name the reaction when an acid is mixed with base.

Form a sentence using the following words: baking soda, ant bite, moist, effect, neutralised, rubbing.

How will you test the presence of an acid in a substance?

What is litmus? How is it prepared?

Sahyog wanted to taste the chemicals in the science lab to match their taste with that what is written in the textbook. Quickly his friend Pratik approaches the teacher and Sahyog was stopped to do so. Now answer the following questions:
(i) Why was Sahyog stopped to taste the chemicals?
(ii) What may happen if you directly put the unknown substance into your mouth unknowingly?
(iii) Which value of Pratik you can see here?

Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only turmeric indicator.

Which of the following are acidic and which are basic?
Lime water, Vinegar, Toothpaste, Stomach juices, Lemon juice, Baking soda solution, Milk of magnesia, Ammonia solution.

You are provided with liquids A, Band C. One contains NaOH, another contains HCI and third is sugar solution. You are given phenolphthalein solution. How will you identify these solutions?

Write three differences between an organic acid and a mineral acid.

What do you mean by soil treatment?

Boojho, Paheli and their friend Golu were provided with a test, each containing China rose solution which was pink in colour. Boojho added 2 drops of solution 'A' in his test tube and got dark pink colour. Paheli added 2 drops of solution '8'to her test tube and got green colour. Golu added 2 drops of solution 'C' but could not get any change in colour. Suggest the possible cause for the variation in their results.

One day Rahul's mother after taking meal felt pain and irritation in her stomach. His father was out of station. Rahul was an intelligent boy. He remembered his teacher's statement and gave his mother some baking soda solution which gave her a relief from pain and irritation of the stomach.
Read the above passage and answer the following questions.
(a) Which information given by Rahul's teacher that helped him to select the baking soda as a remedy?
(b) Why he selects baking soda as a cure?
(c) What values are shown by Rahul?

State the nature of following solution and give effects of these solution on litmus paper.
(i) Detergent solution
(ii) Lime water
(iii) Soft drink
(iv) Sugar solution
(v) Vinegar.

Explain the following with examples:
(a) Acidic oxides
(b) Basic oxides
(c) Amphoteric oxides
(d) Neutral oxides

You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/neutral) of each solution.