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Saturated and Unsaturated Hydrocarbons

Choose the co...

Question

Choose the correct answer:
(i) Which of the following statements is wrong about alkanes?
(a) They are all saturated hydrocarbon.
(b) They can undergo addition as well as substitution reaction.
(c) They are almost non-polar in nature.
(d) On complete combustion give out carbon dioxide and water.

(ii) Select the acid which contains four hydrogen atoms in it.
(a) Formic acid
(b) Sulphuric acid
(c) Nitric acid
(d) Acetic acid

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Solution

(i)
(b) They can undergo addition as well as substitution reactions.
Alkanes can only undergo substitution reactions.

(ii)
(b) Acetic acid
The chemical formula for acetic acid is CH₃COOH. It contains 4 hydrogen atoms in it.

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Q. (a) Distinguish between the saturated hydrocarbon ethane and the unsaturated hydrocarbon ethene by drawing their structural formulae.
(b) Addition reaction and substitution reactions are types of organic reactions. Which type of reaction is shown by:
(i) ethane
(ii) ethene?
(c) (i) Write the equation for the complete combustion of ethane.
(ii) Using appropriate catalysts, ethane can be oxidized to an alcohol, an aldehyde and an acid. Name the alcohol, aldehyde and acid formed when ethane is oxidized.
(d) (i) Why is pure acetic acid known as glacial acetic acid?
(ii) What type of compound is formed by the reaction between acetic acid and an alcohol?

Match the following acids with the food substance in which they are present.

(a) Buttermilk (b) Vinegar (c) Tamarind (d) Lemon

(i) Tartaric Acid (ii) Acetic Acid (iii) Citric Acid (iv) Lactic Acid

Q. Sulphuric acid can be used In the laboratory to prepare the following substances :
(a) Hydrogen (b) Carbon dioxide
(c) Carbon monoxide (d) Sulphur dioxide
(e) Hydrogen chloride (f) Hydrogen sulphide
(g) Nitric acid.
1. Derive a balanced equation for each of the shove preparation.
2. In which of the reactions would you use (give numbers only): (i) Dilute Sulphuric acid, (ii) Sulphuric acid.
3. State the chemical property of sulphuric acid illustrated in each of these reactions.

Q. Select the correct answer from the choices a. b, c and d which are given.
Write only the letter corresponding to the correct answer.
(i) A particular solution contains molecules and ions of the solute so it is a
(a) weak acid
(b) strong acid
(c) strong base
(d) salt solution

(ii) An organic weak acid is
(a) Formic acid
(b) Sulphuric acid
(c) Sulphuric base
(d) Hydrochloric acid

(iii) An example of a complex salt is
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(b) Solution hydrogen sulphate
(c) Iron (II) ammonium sulphate
(d) Tetramine copper (II) sulphate

Q. Hydrochloric acid, nitric acid and sulphuric acid are known as mineral acids because they:

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