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प्रश्न
The solid element A exhibits the property of catenation. It is also present in the form of a gas B in the air which is utilised by plants in photosynthesis. An allotrope C of this element is used in glass cutters.
(a) What is element A?
(b) What is the gas B?
(c) Name the allotrope C.
(d) State another use of allotrope C (other than in glass cutters).
(e) Name another allotrope of element A which exists as spherical molecules.
(f) Name a yet another allotrope of element A which conduct electricity.
उत्तर
(a) Carbon is the element A which exhibits the property of catenation.
(b) Carbon dioxide is the gas B which is utilised by the plants for photosynthesis.
(c) Diamond is the allotrope C of carbon which is used in glass cutters.
(d) Diamond is used in making jewellery.
(e) Buckminsterfullerene is an allotrope of carbon which exists as spherical molecules.
(f) Graphite is another allotrope of carbon which conducts electricity.
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संबंधित प्रश्न
Write the name and general formula of a chain of hydrocarbons in which an addition reaction with hydrogen is possible. State the essential condition for an addition reaction. Stating this condition, write a chemical equation giving the name of the reactant and the product of the reaction.
Define the term ‘structural’ isomerism'.
Draw the structures for Ethanoic acid.
Draw the structures for Butanone
The functional group which always occurs in the middle of a carbon chain is:
(a) alcohol group
(b) aldehyde group
(c) carboxyl group
(d) ketone group
Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.
Match the reactions given in Column (A) with the names given in column (B).
| Column (A) | Column (B) | ||
(a) |
`"CH"_3"OH" + "CH"_3"COOH"overset("H"^+)(->) "CH"_3"COOCH"_3 + "H"_2"O"` | (i) | Addition reaction |
| (b) | `"CH"_3 = "CH"_2 + "H"_2 overset("Ni")(->)"CH"_3 - "CH"_3` | (ii) | Substitution reaction |
| (c) | `"CH"_4 + "Cl"_2overset("Sunlight")(->)"CH"_3"Cl" + "HCl"` | (iii) | Neutralisation reaction |
| (d) | `"CH"_3"COOH" + "NaOH" -> "CH"_3"COONa" + "H"_2"O"` | (iv) | Esterification reaction |
Recognise the carbon chain type of the following:
\[\begin{array}{cc}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\\\ce{H - C - C - C - H}\\
|\phantom{....}|\phantom{....}|\\\ce{H}\phantom{...}\ce{}\phantom{.....}\ce{H}\\
\ce{H - C - H}\\
|\\
\ce{H}
\end{array}\]
Write general formula for alkynes.
Draw the structure of propanol.
