Acids, Bases and Salts

CBSE Class 10 Science · every board question from this chapter, 2025–2025 · 16 of them repeated across years

• Which of the given option represents a family of salts?2025asked 3×
• In order to prepare dry hydrogen chloride gas in humid atmosphere the gas produced is passed through a guard tube (drying tube)…2025asked 3×
• The formula of washing soda is2025
• You have three aqueous solutions A, B and C as given below: A - Potassium nitrate B - Ammonium chloride C - Sodium carbonate The…2025asked 2×
• The warning sign shown in the given figure must invariably be displayed/pasted on the containers which contain hydroxide of:2025asked 3×
• In one formula unit of salt 'X', seven molecules of water of crystallisation are present. The salt 'X' is:2025
• The following table shows the pH values of four solutions A, B, C and D on a pH scale: The solutions A, B, C and D respectively…2025
• The chlorine produced during the electrolysis of brine solution is used in the manufacture of:2025
• A common feature observed in the crystals of washing soda, copper sulphate, gypsum and ferrous sulphate is that all2025
• The body of human beings works within the pH range of:2025asked 2×
• Consider the following reactions: (i) Dilute hydrochloric acid reacts with sodium hydroxide. (ii) Magnesium oxide reacts with…2025asked 3×
• Tooth enamel is made up of calcium hydroxyapatite (a crystalline form of calcium phosphate). This chemical starts corroding in…2025
• Juice of tamarind turns blue litmus to red. It is because of the presence of a chemical compound called2025asked 2×
• The nature of aqueous solution of potassium nitrate is:2025
• The water of crystallization is present in (i) Bleaching Powder (ii) Plaster of Paris (iii) Washing Soda (iv) Baking Soda2025asked 3×
• Assertion: Hydrogen gas is not evolved when a metal reacts with nitric acid. Reason (R): Nitric acid is a strong reducing agent…2025asked 2×
• Assertion: Concentrated nitric acid is diluted by adding water slowly to acid with constant stirring. Reason (R): Concentrated…2025asked 3×
• A crystalline substance of green colour 'X' emits gases of characteristic odour when heated over a flame. It first loses water…2025
• Write the formula of the ions which (i) acids, and (ii) bases generate in water solutions. Dry HCl gas does not change the colour…2025
• A chemical compound 'X' is used to bleach washed clothes in laundry as well as to make drinking water free from germs. Identify…2025
• Giving reason, state the advantage of using baking powder over baking soda for the preparation of bread or cakes.2025
• Write chemical formula of washing soda. How is it obtained from baking soda? List two uses of washing soda.2025asked 3×
• In an experiment a student dipped pH papers in four different solutions A, B, C and D and reported his observation as given…2025
• Common salt is an important raw material for various chemicals of daily use. State in brief the method of preparation of (i)…2025asked 3×
• State the chemical property in each case on which the following uses of baking soda are based upon: (i) as an anti-acids (ii) as…2025asked 2×
• Acid-base indicators can be used to distinguish between an acid and a base. Universal indicator, a mixture of several indicators,…2025asked 3×
• Seawater contains many salts dissolved in it. Common salt is separated from these salts. Deposits of solid salt are also found in…2025asked 3×
• Common salt is a very important chemical compound for our daily life. It's chemical name is sodium chloride and it is used as a…2025asked 3×

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