Fill in the following blanks with suitable words:

(a) The process of burning of a hydrocarbon in the presence of air to give CO₂, H₂O, heat and light is known as .............

(b) The sodium salt of a long chain fatty acid is called .............
(c) ............. is better than soap for washing clothes when the water is hard.
(d) The organic acid present in vinegar is .............

Academic Chemistry NCERT Class 10

Fill in the following blanks with suitable words:

(a) The process of burning of a hydrocarbon in the presence of air to give CO₂, H₂O, heat and light is known as combustion.

(b) The sodium salt of a long chain fatty acid is called soap.

(c) Detergent is better than soap for washing clothes when the water is hard.

(d) The organic acid present in vinegar is ethanoic acid.

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Updated on: 10-Oct-2022

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(a) Explain the process of preparation of soap in laboratory. (b) Why is common salt (sodium chloride) added during the preparation of soap? (c) Why is soap not suitable for washing clothes when the water is hard?

(a) How does ethanoic acid react with sodium hydrogen carbonate? Give equation of the reaction which takes place. (b) Why are carbon and its compounds used as fuels for most applications? (c) Which of the two is better for washing clothes when the water is hard: soap or detergent? Give reason for your answer.

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Fill in the following blanks with suitable words:(a) Light travelling along a normal is __________ refracted.(b) Light bends when it passes from water into air. We say that it is __________.

Fill in the following blanks with suitable words:(a) In water, the proportion of oxygen and hydrogen is _____ by mass.(b) In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called _____.

Fill in the following blanks with suitable words:(a) Chemical equations are balanced to satisfy the law of _____. (b) A solution made in water is known as an ____ solution and indicated by the symbol ____.

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Write the formula of the following Compounds:(a) Water (b) Washing Soda (c) Vinegar (d) Sulphuric acid (e) Sand (f) Glucose

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