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Ans. (c) An addition reaction
Explanation:
Unsaturated hydrocarbons are those hydrocarbons in which there is at least one double or triple bond. For example, Ethene (CH_2=CH_2) is an unsaturated hydrocarbon and they undergo additional reaction only.
Ans. (a)
Explanation:
Carbon atoms are small in size and this enables its nucleus to hold on the shared pair of electrons quite strongly.
Explanation:
(a) C_2H_4 contains a double bond between two carbon atoms.
(b) C_2H_2
contains a triple bond between two carbon atoms.
Explanation:
(i) n = Number of C-atoms in a molecule of alkene.
2n = Number of H-atoms in a molecule of alkene.
(ii) The lowest value of n is 2.
(iii) Butene (C_4H_8).\\
The first member of the alkene family is C_2H_4.\\
(iv) It is called ethene, the structural formula is :
Explanation:
Urea was the first organic compound synthesised in a laboratory. It was done by Friedrish Wohler in 1828 by heating ammonium cyanate (an inorganic compound).
Ammonium cyanate is an inorganic compound while urea is an organic compound. Wohler prepared urea without involving living organisms. At the point of starting modern organic chemistry he has been dubbed as the father of organic chemistry. Let's have a look at some important uses of urea and its properties. Human urine has a major organic component as urea. Urea is used as a fertiliser due to its high levels of nitrogen. Dry, rough skin conditions can be treated by urea. It is also helpful in removing dead tissues. Urea dissolves in the kidney and blood excretes it in urine. It is non-toxic, colourless and can be dissolved in water. In urea there is a carbonyl group attached to two amide groups. In a carbonyl group, a double bonded carbon atom bonded to an oxygen atom. It is also called carbide and can be readily prepared from carbon dioxide and ammonia. Urea behaves as a weak mono acidic base.
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Download NowChapter No. | Chapter Name |
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Chapter 1 | Periodic Properties and Variations of Properties |
Chapter 2 | Chemical Bonding |
Chapter 3 | Study of Acids, Bases and Salts |
Chapter 4 | Analytical Chemistry |
Chapter 5 | Mole concept and Stoichiometry |
Chapter 6 | Electrolysis |
Chapter 7 | Metallurgy |
Chapter 8 | Study of Compounds : Hydrogen Chloride |
Chapter 9 | Study of Compounds : Ammonia and Nitric Acid |
Chapter 10 | Study of Compounds : Sulphuric Acid |
Chapter 11 | Organic Compounds |
Chapter Wise Important Questions for ICSE Board Class 10 Chemistry |
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Periodic Properties and Variations of Properties |
Chemical Bonding |
Study of Acids, Bases and Salts |
Analytical Chemistry |
Mole concept and Stoichiometry |
Electrolysis |
Metallurgy |
Study of Compounds : Hydrogen Chloride |
Study of Compounds : Ammonia and Nitric Acid |
Study of Compounds : Sulphuric Acid |
Organic Compounds |
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