10th Class Physical Science Chapter wise Important bit bank in English

51. The hydrocarbons containing only C–C single bonds are known as ______________________.

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saturated hydrocarbons

52. All alkanes are ______________.

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saturated hydrocarbons

53. The hydrocarbons that contain at least one double bond (C=C) or contain at least one triple bond (C≡C) between the two carbon atoms are called ___________________.

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unsaturated hydrocarbons

54. _________ and _________ are the examples for unsaturated hydrocarbons.

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Alkenes , Alkynes

55. Straight chain, branched chain and closed chain hydro carbon compounds may be ___________ or ___________ .

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saturated , unsaturated

56. The hydrocarbons that contain –OH group are called _________.

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alcohols

57. General formula of alcohols is R – OH where ‘R’ is alkyl group, __________.

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CnH2n+1

58. The hydrocarbons with functional group –CHO are called ________.

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aldehydes

59. The hydrocarbons with functional group C=O are called _________.

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ketones

60. If one hydrogen atom is replaced from NH3 by an alkyl group we get the so called _________________.

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primary amines

61. If two hydrogen atoms of NH3 are replaced by two alkyl groups (same or different) we get ____________.

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secondary amines

62. The characteristic properties of an organic compound depend mainly on an atom or group of atoms in its molecule known as the ______________.

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functional group

63. The common system of the Butane is ____________.

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n-butane

64. The common system 2-methyl propane is ___________.

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iso-butane

65. The compounds which are having same molecular formula but different structures are called __________.

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isomers

66. The phenomenon of possessing same molecular formula but different properties by the compounds is known as ___________.

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isomerism

67. The series of carbon compounds in which two successive compounds differ by –CH2 unit is called ____________.

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homologous series

68. Oxidation reactions may be carried out using ____________.

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oxidizing agents

69. Fats and oils are both of _____________.

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fatty acids

70. A reaction in which an atom or a group of atoms in a given compound is replaced by other atom or group of atoms is called a ____________.

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substitution reaction

71. The process of conversion of starches and sugars to C2H5OH is called _______________.

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fermentation process

72. Pure ethanol boils at 78.3oC. Pure ethanol is called ____________.

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absolute (100 %) alcohol

73. ___________ is ethanol that contains impurities that make it undrinkable.

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Denatured alcohol

74. The chemical formula of potassium-di-chromate is ________.

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K2Cr2O7

75. K2Cr2O7 is a good ___________.

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oxidizing agent
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