English Medium कक्षा १० - CBSE Question Bank Solutions for Science

What is a salt?

Give the names and formulae of any two salts. Also name the acids and bases from which these salts may be obtained.

What is meant by ‘a family of salts’? Explain with examples.

What is meant by ‘hydrated’ salts? Explain with examples.

Write the names, formulae and colours of any two hydrated salts.

What will be the colour of litmus in an aqueous solution of ammonium chloride salt?

The products of chloro-alkali process are ______.

The number of molecules of water of crystallisation present in washing soda crystals is ______.

The aqueous solution of one of the following salts will turn red litmus to blue. This salt is:

The salt whose aqueous solution will have no effect on either red litmus or blue litmus is ______.

The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is:

A salt whose aqueous solution will have a pH of more than 7 will be ______.

A salt is dissolved in water and the pH of this salt solution is measured with a universal indicator paper. If the pH of solution is less than 7, the salt is most likely to be ______.

Which of the following salts will give an aqueous solution having pH of almost 7?

P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:

1. blue litmus red?
2. red litmus blue?

The metal salt A is blue in colour. When salt A is heated strongly over a burner, then a substance B is eliminated and a white powder C is left behind. When a few drops of a liquid D are added to powder C, it becomes blue again. What could be A, B, C and D?

When the concentrated aqueous solution of substance X is electrolysed, then NaOH, Cl₂ and H₂ are produced. Name the substance X. What is the special name of this process?

Give one example of a salt which gives an aqueous solution having:

pH less than 7

Give one example of a salt which gives an aqueous solution having:

pH equal to 7

Give one example of a salt which gives an aqueous solution having:

pH more than 7