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Science Olympiad Test: Carbon and Its Compounds- 1 - Class 10 MCQ


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10 Questions MCQ Test - Science Olympiad Test: Carbon and Its Compounds- 1

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Science Olympiad Test: Carbon and Its Compounds- 1 - Question 1

Carbon forms a large member of organic compounds due to

Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 1
  • Catenation: The unique property of the 'C' element to be able to form continuous links with other 'C' atoms through covalency called catenation, is one reason for the existence of a large number of organic compounds.
  • Tetravalency: The carbon atom's four valence electrons can be shared by other atoms that have electrons to share, thus forming covalent (shared-electron) bonds. They can even be shared by other carbon atoms, which in turn can share electrons with other carbon atoms and so on, forming long strings of carbon atoms, bonded to each other like links in a chain.
  • Isomerism: The same collection of atoms and bonds, but in a different geometrical arrangement within the molecule, makes a molecule with a different shape and hence different properties. These different molecules are called isomers.
  • Multiple Bond: Carbon atoms can share not only a single electron with another atom to form a single bond, but it can also share two or three electrons, forming a double or triple bond.
Science Olympiad Test: Carbon and Its Compounds- 1 - Question 2

Ethane, with molecular formula C2H6 has

Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 2

The structure of ethane is 

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Science Olympiad Test: Carbon and Its Compounds- 1 - Question 3

Which of the following are correct structural isomers of butane?



Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 3

Only (i) and (ii) has the same M.F. (C4H10) while (ii) and (iv) have C4H8 as the M.F.

Science Olympiad Test: Carbon and Its Compounds- 1 - Question 4

Functional groups present  in aspirin

Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 4

An ester is an organic compound that is a derivative of a carboxylic acid in which the hydrogen atom of the hydroxyl group has been replaced with an alkyl group.

Science Olympiad Test: Carbon and Its Compounds- 1 - Question 5

Buckminster fullerene is an allotropic form of

Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 5

Buckminsterfullerene (C60) or buckyball is one of the allotropes of carbon. The structure of fullerene is like in a cage shape due to which it looks like a football.

Science Olympiad Test: Carbon and Its Compounds- 1 - Question 6

Which of the following substances is added to denature ethanol?

Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 6

Denatured alcohol, also called methylated spirits has additives to make it poisonous, extremely bad tasting, foul smelling or nauseating. This is done in order to discourage its recreational consumption.

Science Olympiad Test: Carbon and Its Compounds- 1 - Question 7

A molecule of ammonia (NH3) has

Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 7

Nitrogen has three electrons in its outermost shell and hydrogen has 1. 3 hydrogen atoms combine with 1 nitrogen atom to make ammonia. These bonds are single bonds.
Single bond: When two atoms share one electron pair between each other, then they are said to be bonded by single covalent bond, denoted by single dash joining the atoms.

Science Olympiad Test: Carbon and Its Compounds- 1 - Question 8

Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of 

Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 8

In its innermost shell, the carbon atom has two electrons and four valence electrons. When it forms covalent bonds with four univalent atoms, it gains an extra four electrons by sharing them. In its outermost shell, there are now 8 electrons. This is similar to neon’s electronic configuration, which is electronic configuration 2, 8.
The electron configuration of neon is
Ne(Z = 10) = 1s2 2s2 2p6

Science Olympiad Test: Carbon and Its Compounds- 1 - Question 9

Which of the following set of compounds have the same molecular formula?

Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 9

The molecular formula must be the same for both the molecules but the arrangement of atoms should be different. For example, look at the structure of n-butane and isobutane. Both of these molecules have the same molecular formula that is C4H10.

Science Olympiad Test: Carbon and Its Compounds- 1 - Question 10

Rubbing alcohol is

Detailed Solution for Science Olympiad Test: Carbon and Its Compounds- 1 - Question 10

Rubbing alcohol is common name of isopropyl alcohol (C3H7OH).

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