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Tamilnadu SSLC Science Lesson 11 – One Marks
Choose the correct answer:
1.
The molecular formula of an open chain organic compound is C3H6. The class of the compound is
2. The IUPAC name of an organic compound is 3 – Methyl butan – 1 – ol. What type compound it is?
Aldehyde Carboxylic acid Ketone Alcohol
3. The secondary suffix used in IUPAC nomenclature of an aldehyde is
-ol oic acid -al -one
4. Which of the following pairs can be the successive members of a homologous series?
C3H8 and C4H10 C2H2 and C2H4 CH4 and C3H6 C2H5OH and C4H8OH
5. C2H5OH + 3O2 -> 2CO2 + 3H2O is a
Reduction of ethanol Combustion of ethanol Oxidation of ethanoic acid Oxidation of ethanol
6. Rectified spirit is an aqueous solution which contains about ______of ethanol.
95.5 %
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75.5 % 55.5 % 45.5 %
7. Which of the following are used as anaesthetics?
Carboxylic acids Ethers Esters Aldehydes
8. TFM in soap represents ______content in soap.
Mineral Vitamin Fatty acid Carbohydrate
9. Which of the following statements is wrong about detergents?
It is a sodium salt of long chain fatty acids. It is sodium salts of sulphonic acids The ionic part in a detergent is –SO3 –Na+ It is effective even in hard water.
Fill in the blanks:
1. An atom or a group of atoms which is responsible for chemical characteristics of an organic compound is called ______
Functional group
2. The general molecular formula of alkynes is ______
CnH2n-2
3. In IUPAC name, the carbon skeleton of a compound is represented by ______(root word / prefix / suffix)
Root Word
4. (Saturated / Unsaturated) ______compounds decolourize bromine water.
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Unsaturated
5. Dehydration of ethanol by conc sulphuric acid forms ______(ethane / ethane)
Ethene
6. 100 % pure ethanol is called ______
Absolute alcohol
7. Ethanoic acid turns ______litmus to ______
Blue, red
8. The alkaline hydrolysis of fatty acids is termed as ______
Saponification
9. Biodegradable detergents are made of ______(branched/straight) chain hydrocarbons.
Straight
Match the following:
Column – I Column – II Answers Functional group –OH Benzene Alcohol Heterocyclic Potassium stearate Furan Unsaturated Alcohol Ethene Soap Furan Potassium stearate Carbocyclic Ethene Benzene
Additional One Word:
1. Organic compound have a ______structure.
Complex
2. Organic compounds are ______reactive when compared to inorganic compounds.
Less
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3. Most of the organic compound form ______bonds.
Covalent
4. Organic compound have ______melting point when compared to inorganic compounds.
Lower
5. Acyclic compounds are also called ______
Open chain compounds
6. The compound is called ______when one or more double or triple bonds exist between carbon atoms.
Unsaturated
7. CH3 – CH = CH2, is a/an ______carbon compound.
Unsaturated
8. Cyclic carbon compounds which contain only carbon atoms are called ______
Carbocyclic
9. ______rings contain alternate double lands between carbon atoms.
Benzene
10. ______compounds are also called closed chain compounds.
Cyclic
11. Organic chemistry is the chemistry of ______carbon compounds.
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Catenated
12. If all the carbon atoms in the chain are connected by single bonds, the compound is called as ______
Saturated
13. Organic compounds in which the chain of carbon atoms is closed or cyclic are called ______compounds
Cyclic
14. Carbocyclic compounds are further subdivided into ______and ______compounds.
Alicyclic, aromatic
15. Alicyclic compounds contain one or more _____ rings.
Carbocyclic
16. Aromatic compounds contain one or more ______rings.
Benzene
17. The carbon atoms in organic compounds are linked through ______bonds.
Covalent
18. Ethane is an example of a/an _____ carbon compound.
Saturated
19. Ethyne CH = CH, is an example of a/an ______carbon compound.
Unsaturated
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20. The general formula for Alkynes is ______
CnH2n-2
21. The organic compounds that are composed of only carbon and hydrogen atoms are called
Hydrocarbons
22. ______are hydrocarbons, which contain only single bonds.
Alkanes
23. Hydrocarbons which contain one or more C= C bonds are called ______
Alkenes
24. Hydrocarbons containing carbon to carbon triple bond are called ______
Alkynes
25. ______is the simplest alkyne.
Acetylene
26. The general formula of alkanes is ______
CnH2n+2
27. ______is the simplest alkane.
Methane
28. The general formula for alkenes is ______is the simplest alkene.
CnH2n Ethylene
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29. Lower hydrocarbons are ______at room temperature.
Gases
30. The boiling point of hydrocarbons increases with the number of ______atoms.
Carbon
31. ______are least reactive when compared to other classes of hydrocarbons.
Alkanes
32. ______are saturated hydrocarbons.
Alkanes
33. Alkenes and Alkynes are ______hydrocarbons.
Alkenes
34. A ______group is an atom or group of atoms in a molecule, which gives its characteristic chemical properties.
Functional
35. The chemical properties of an organic compound depend on its ______group.
Functional
36. A series of compounds containing the same functional group is called a ______Compounds.
Class of organic
37.
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______is a group or a class of organic compounds having same general formula and similar chemical properties.
Homologous series
38. Each member of the homologous series differ from the preceding or succeeding member by one ______group.
Methylene
39. Each member of the homologous series differ from the preceding or succeeding member by a molecular mass of ______
14 amu
40. All members of a homologous series contain the ______elements.
Same
41. The members of the homologous series are represented by a general molecular formula ______
CnH2n+2
42. The members in each homologous series show a regular gradation in physical properties with an increase in ______
Molecular mass
43. ______properties of the members of a homologous series are similar.
Chemical
44. Homologous series differ by a ______group.
CH2
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45. The ______acid was initially obtained by distillation of red ants.
Formic
46. The root words for the parent chain of hydrocarbons containing 1 carbon atom is ______
Meth-
47. The root words for the parent chain of hydrocarbons containing 6 carbon atom is ______
Hex-
48. The root words for the parent chain of hydrocarbons containing 9 carbon atom is _____
Non-
49. Prefix + ______+ Suffix -> IUPAC name.
Root Word
50. A ______is the basic unit which described the carbon selection.
Root Word
51. The prefix used for IUPAC substituent –F is ______
Fluoro
52. The prefix used for IUPAC substituent –NH2 is ______
Amino
53. The prefix used for IUPAC substituent –CH2CH3 is ______
Ethyl
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54. The ______suffix comes after the root world.
Primary
55. If all the bonds between the carbon atoms of the parent chain are single, then suffix ______is used.
Ane
56. The secondary suffix describes the ______group of the compound.
Functional
57. The suffix used for class of the compound aldehydes is ______
-al
58. The suffix used for class of the compound ketones is ______
-one
59. Ethanol is commonly known as ______
Alcohol
60. All alcoholic beverages and some cough syrups contain ______
Ethanol
61. The molecular formula of ethanol is ______
C2H5OH
62. Ethanol is manufactured by the fermentation of ______
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Molasses
63. ______is a dark coloured syrupy liquid left after the crystallization of sugar from the concentrated sugarcane juice.
Molasses
64. If the nitrogen content of the molasses is poor, it may be fortified by the addition of ______or ______
Ammonium sulphate, ammonium phosphate
65. The fermented liquid during the formation of ethanol is called ______
Wash
66. The fermented liquid in the formation of ethanol contains 15 to 18 % of ______
Alcohol
67. ______is conversion of complex organic molecules into simpler molecules by the action of enzymes.
Fermentation
68. Curding of milk is an example of ______
Fermentation
69. The boiling point of ethanol is ______degree C.
78
70. When ethanol is heated with con H2SO4 at 443K, it loses a ______molecule.
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Water
71. Ethanol reacts with ______metal to form sodium ethoxide and hydrogen gas.
Sodium
72. ______is used in medical wipes, as an antiseptic.
Ethanol
73. Ethanol is used as an ______in automobile radiators.
Anti – freeze
74. Methylated spirit is a mixture of 95% of ______and 5% of ______
Ethanol, methanol
75. Rectified spirit is mixture of ______of ethanol and _____ of water.
95.5 %, 4.5 %
76. Power alcohol is a mixture of ______and ethanol.
Petrol
77. Denatured spirit is ethanol mixed with ______
Pyridine
78. Ethanoic acid is also called as ______acid.
Acetic
79. The molecular formula of ethanoic acid is ______
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C2H4O2
80. On cooling, pure ethanoic acid is ______to form ice like flakes.
Frozen
81. When a sodium salt of ethanoic acid is heated with soda lime ______gas is formed.
Methane
82. ______acid, in lower concentration, is used as a food additive.
Acetic
83. Ethanoic acid is an important member in the ______family.
Carboxylic acid
84. Ethanoic acid is ______in taste.
Sour
85. ______acid is also known as glacial acetic acid.
Ethanoic
86. ______acid is used in the manufacture of plastic.
Ethanoic
87. All the cooking oils and lipids contain ______
Esters
88.
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______is a cleaning agent that is composed of one or more salts of fatty acids.
Soap
89. ______is a chemical compound or a mixture of chemical compounds, which is used as a cleaning agent.
Detergent
90. Soaps are sodium or potassium salts of some long chain carboxylic acids, called ______acids
Fatty
91. Soap requires two major raw materials _____ and ______
Fat, Alkali
92. The alkali commonly used in the preparation of soap is ______
Sodium hydroxide
93. A ______based soap creates a more water soluble product than a sodium based soap.
Potassium
94. ______soaps are used for washing purposes.
Hard
95. ______soaps are used for cleansing the body.
Soft
96. ______process is the oldest method in the manufacturing of soap.
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Kettle
97. ______which prevents the corrosion and ensures that the detergent does not damage the washing machine.
Sodium silicate
98. The polar end of a soap molecule is ______in a nature.
Hydrophilic
99. The non-polar end of a soap molecule ______in a nature.
Hydrophobic
100. The ______part of the soap molecule traps the dirt.
Hydrophobic
101. The ______part of a soap molecule entire molecule soluble in water.
Hydrophilic
102. When a soap a detergent is dissolved in water, the molecules join together as clusters called ______
Micelles
103. ______can be used in both hard and soft water.
Detergents
104. ______can clean more effectively in hard water than soap.
Detergents
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105. ______do not leave any soap scum on the tub or clothes.
Detergents
106. ______have a linear hydrocarbon chain, which is biodegradable.
Detergents
107. Detergents are active ______of motor grease.
Emulsifiers
108. ______have straight hydrocarbon chains, which can be easily degraded by bacteria.
Biodegradable detergents
Match the Following:
Column A Column B Answers Acyclic Closed chain Open chain Cyclic Carbocyclic rings Closed chain Alicyclic Open chain Carbocyclic rings Aromatic Isomerism Benzene rings Organic Compounds Benzene rings Isomerism
Column A Column B Answers Saturated compound Benzene Ethane Unsaturated compound Cyclobutane Ethene Heterocyclic compound Ethane Pyridine Alicyclic compound Ethene Cyclobutane Aromatic compound Pyridine Benzene
Column A Column B Answers Alkane CnH2n CnH2n+2 Alkene CnH2n+2 CnH2n Alkyne C2H6 CnH2n-2 Ethane CH4 C2H6 Methane CnH2n-2 CH4
Column A Column B Answers
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Alcohol R-O-R R-OH Aldehyde R-COOH R-CHO Ketone R-OH R-CO-R Ether R-CHO R-O-R Carboxylic acid R-CO-R R-COOH
Column A Column B Answers Ethanol Potassium Alcohol Acetic acid Alcohol Food additive Hard soap Caustic soda Caustic soda Soft soap Food additive Potassium Hydrophobic Water loving Water hating Hydrophilic Water hating Water loving
Choose the Correct Answer:
1. Lower hydrocarbons are ______at room temperature.
Solids Liquids Gases None of the above
2. ______is used as a solvent for drugs.
Methanol Ethanol Propanol Butanol
3. The boiling point of ethanol is ______degree C.
70 78 87 90
4. Denatured spirit is ethanol mixed with ______
Methol Acetic acid
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Formic acid Pyridine
5. i. Alkenes are least reactive when compared to other classes of hydrocarbons ii. Alkanes are unsaturated hydrocarbons iii. Alkynes are saturated hydrocarbons iv. Hydrocarbons are insoluble in water i and iv are correct ii and iii are correct i and iii are correct iv is correct
6. Each member of the homologous series differ from the other by one ______group.
Methylene Ethylene Propanol Butanol
7. The prefix used for substituent –CH3 is ______
Fluoro Bromo Ethyl None of the above
8. The root word for the parent hydrocarbon containing 8 carbon atoms is _____
Pent – Oct – Dec – Prop –
9. The number of carbon atoms in butane is ______
1 3 4
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5
10. Cyclobutane is an example of a ______compound.
Alicyclic Aromatic Cyclic Acyclic
11. Hydrocarbons containing carbon to carbon triple bonds are called ______
Alkanes Alkenes Alkynes None of the above
True or False:
1. If the chain contains carbon and other atoms these compounds are called carbocylic compounds.
False
2. The hydrocarbons, which contain one or more C = C bonds are called alkynes.
False
3. The physical properties of an organic compound depend on its functional group.
False
4. The members in each homologous series show a regular gradation in their physical properties with respect to their increase in atomic mass.
False
5. Acetic acid is manufactured in industries by the fermentation of molasses.
False
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6. Ester is highly inflammable liquid.
False
7. Ethanol is a colourless liquid having an unpleasant odour.
False
8. When a sodium salt of ethanoic acid is heated with soda lime, hydrogen gas is formed.
False
9. Hard water contains sodium and magnesium ions (Ca2+ and Mg2+) that limit the cleaning action of soap.
False
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