| (Q.1) The molecular formula of alcohol derived from pentane is |
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(a) C5H9OH
(b) C5H7OH
(c) C5H11OH
(d) C5H10OH
| (Q.2) Cleansing action of soaps is based on the principle that |
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(a) Soap reacts with the dust
(b) The ionic end of the soap dissolves in water while the carbon chainbonds with oil or dirt.
(c) The soap molecules attracts dirt.
(d) Soap combines with the dirt.
| (Q.3) Saponification is |
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(a) Is dehydration of the ester
(b) Is the hydrolysis of the ester
(c) Is the hydration of the ester
(d) Is the formation of ester
| (Q.4) Ethanol gets oxidized to |
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(a) Ethanal with alkaline KMnO4.
(b) Ethanoic acid by alkaline KMnO4
(c) Ethanal in presence of cuperic oxide.
(d) Ethanoic acid in presence of platinum catalyst.
| (Q.5) Esterification is the name given to |
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(a) Reaction of an alcohol with a carboxylic acid in presence of Sulphuric acid
(b) Formation of a new substance.
(c) A type of addition reaction.
(d) A type of rearrangement reaction.
| (Q.6) Ethanol is a highly inflammable liquid implies that it is highly combustible: |
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(a) Ethanol catches fire at high temperatures.
(b) Ethanol burns with ayellow sootyflame
(c) The products obtained after combustion are Carbon dioxide and water.
(d) The products of combustion is an organic acid and water.
| (Q.7) Substitution reactions are those reactions in which |
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(a) Saturated hydrocarbons replace the cations of an inorganic compound
(b) One type of atoms or a group of atoms takes the place of another.
(c) Alkyl group replaces the anion of an inorganic compound
(d) Are shown by unsaturated hydrocarbons.
| (Q.8) Addition Reactions are those reactions in which- |
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(a) The reaction takes place immediately on mixing the reactants
(b) Unsaturated hydrocarbons add hydrogen in presence of a catalyst.
(c) Hydrogen atom is replaced by a group of atoms containing more than one atom.
(d) Two molecules of the same hydrocarbon form a larger molecule.
| (Q.9) Alcohols are compounds- |
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(a) Containing – OH group attached to alkyl group.
(b) Containing – CO- group attached to alkyl groups.
(c) Containing – CHO group attached to alkyl group.
(d) Containing – COOH group attached to alkyl group.
| (Q.10) Most carbon allotropes and carbon compounds on complete combustion |
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(a) Give a foul smell
(b) Produce a dark mass
(c) Release heat and light in addition to liberating CO2
(d) None of these
| (Q.11) The two consecutive members of a homologous series differ by: |
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(a) CH group
(b) 14 u
(c) Functional group
(d) CH3 group
| (Q.12) Which of the following functional group contains Carbon, Hydrogen and Oxygen ? |
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(a) Aldehyde
(b) Amine
(c) Nitro
(d) Halogen
| (Q.13) Homologous series is a series of compounds in which |
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(a) The same functional group substitutes for hydrogen in a carbon chain.
(b) Formulae of successive compounds differ by a –CH3 – unit.
(c) Representation is possible by aany formula.
(d) Is collection of compounds with different functional groups.
| (Q.14) Functional group in an organic compound |
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(a) is an atom or group of atoms bonded to carbon in a unique manner.
(b) Present in the compound
(c) Present in the container
(d) Makes no difference to the compound.
| (Q.15) Chemical properties of an organic compound (carbon compound) depend on- |
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(a) The functional group
(b) Constituent elements
(c) Number of hydrogen atoms
(d) Number of carbon atoms
| (Q.16) Occurrence of organic compounds having same molecular formula but different structures is called |
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(a) Catenation
(b) Allotropy
(c) Isomerism
(d) Isotopes
| (Q.17) Saturated carbon compounds |
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(a) have the carbon atoms linked together with a single covalent bond.
(b) are normally not very reactive.
(c) are also called alkenes.
(d) Are not very useful.
| (Q.18) The unique ability of a carbon atom to form bonds with other atoms of carbon is called- |
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(a) Catenation
(b) Allotropy
(c) Isomerism
(d) Isotopes
| (Q.19) Graphite is smooth & slippery and a good conductor of electricity because |
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(a) Each carbon atom is bonded to three other carbon atoms.
(b) One of the bonds connecting the Carbon atoms is a double bond.
(c) Bonds are strong.
(d) Carbon atom is sp hybridised.
| (Q.20) Diamond is the hardest substance because- |
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(a) It has a rigid three-dimensional structure.
(b) It has no free electrons.
(c) It has hexagonal layers of carbon rings over each other.
(d) It has a two-dimensional structure.
| (Q.21) Occurrence of carbon in different forms is termed as- |
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(a) Catenation
(b) Allotropy
(c) Isomerism
(d) Isotopes
| (Q.22) A covalent compound : |
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(a) Have definite geometry.
(b) Have strong bond.
(c) Are poor conductors of electricity and have low melting and boiling points.
(d) Are electrolytes.
| (Q.23) Carbon completes its octet by- |
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(a) Donating the four electrons
(b) Accepting four electrons
(c) Sharing the four electrons
(d) Forming ions
