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GK - EDS > (CAR) Chemistry > Flashcards

(CAR) Chemistry Flashcards

1
Q

_____ gas is used for extinguishing Fire

A

Carbon Dioxide

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2
Q

Strains of rust from iron on cloth can be removed by

A

Oxalic Acid

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3
Q

Cooking gas is a mixture of ____ gas

A

Oxygen and methane

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4
Q

On addition of salt to water

A

its boiling point increases

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5
Q

_____ gas doesnt pollute air

A

Nitrogen Dioxide

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6
Q

The inorganic natural resource of the earth is

A

Mineral Fuels

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7
Q

____ has the highest fuel value

A

Hydrogen

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8
Q

___ and ____ group of compounds constitute carbohydrates

A

Starch and Sugar

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9
Q

Chemical Name of Baking Soda

A

Sodium Bicarbonate

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10
Q

Milk lacks in one imp nutrient

A

Iron

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11
Q

Ripening of fruits hastened by ____ gas

A

Ethylene

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12
Q

Iron articles rust coz of

A

A mixture of ferrous and ferric hydroxide

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13
Q

Gunpowder consists of

A

75% potassium nitrate + 10% charcoal + 15% sulphur

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14
Q

X-rays are produced when a stream of electrons in an X ray tube

A

Strikes metal target

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15
Q

In the periodic table, elements have been arranged

A

In order of increasing atomic number

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16
Q

Atom bomb is based on the principle of

A

Nuclear Fission

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17
Q

Oxidation involves

A

Loss of electrons

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18
Q

the substances are radioactive, which have

A

Nuclei with less number of neutrons

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19
Q

In a hydrogen bomb, hydre ogen is converted into

A

Helium

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20
Q

When two ice cubes are pressed over each other they unite to form one cube. Which of the following force is responsible for holding them together ?

A

Hydrogen bond formation

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21
Q

The high boiling point of water is due to

A

Hydrogen bonding among water molecules

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22
Q

Joule Thompson Effect?

A

The cooling caused by the of a compressed gas below its inversion temperature without doing external work

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23
Q

Sea water is converted into fresh water by using phenomenon of

A

Reverse Osmosis

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24
Q

Smoke is an example of

A

Solid dispersed in gas

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25
Q

Milk can be preserved by a few drops of

A

Formaldehyde solution

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26
Q

Detergent action of soap and synthetic detergents is due to their

A

Emulsifying proerties

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27
Q

Digestion of fats in the intestines is aided by

A

Emulsification

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28
Q

The reaction taking place at anode and cathode are ?

A

Oxidation, Reduction

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29
Q

During electrolysis, metals are deposited at the cathode, because

A

the cathode supplies electrons

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30
Q

Heavy water is known as heavy coz

A

It is an oxide of deuterium

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31
Q

Most of known elements are

A

Metals

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32
Q

Stainless steel does not rust coz

A

Chromium forms an oxide layer that protects iron rusting

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33
Q

The engines of the rockets that helped the Apollo II spacecraft to land on the moon used for rocket fuel power?

A

Hydrazine

34
Q

Many people died in Lonadon in 1952 as a result of air pollution caused by

A

smog

35
Q

Fluorocarbons are effective scavenger for ozone due to

A

Photolytic decomposition of O3 into CI and O2

36
Q

Detergents are better than soap coz

A

They are less affected by hard water

37
Q

Chemically, Soap is

A

Salt

38
Q

Lipids are

A

Long chain of fatty acid esters

39
Q

Firdous Al Hikmat Fe Ilmul Kemia was written by

A

Khalid bin Yazeed

40
Q

Ammonia was obtaned from Urine by

A

Friedrich Wöhler

41
Q

Madam Curie is famous for his work in the feild of

A

Nuclear Chemistry

42
Q

Who was first to prepare sulphuric Acid

A

Jabir Bin Hayan

43
Q

Dalton’s atomic theory gave the concept of

A

Valency

44
Q

When radioactive rays are passed through air or any gas, they caused to

A

Ionize

45
Q

the elements in the first period of the peroidic table are

A

Hydrogen and Helium

46
Q

The reason for chlorinating water is

A

To kill germs

47
Q

Condensation

A

Cooling of vapours of some compounds change them directly in to solid state

48
Q

carbonated drinks are example of

A

Gas in water

49
Q

Fog is an exmaple is

A

Liquid in gas

50
Q

The common battery used in automobiles is

A

Lead storrage battery

51
Q

____ acid present in sour milk

A

Formic Acid

52
Q

The water that can produce good lather with soap is known as

A

Soft water

53
Q

____ is the purest form of carbon

A

Diamond

54
Q

In colourful diamond, diff colours are present due to

A

Impurities

55
Q

Ozone present in ____ and ____ layers of atmosphere

A

Troposhere and Stratosphere

56
Q

In Pak and other countries ____ method is used in manufacture of sulphuric acid

A

Contact process

57
Q

The process of smelting and cooling converts pig iron into

A

Cast Iron

58
Q

Pure Iron is obtained by the reduction of _____ in the blast furnance

A

Iron Oxide

59
Q

Methane is used in daily life with the name of

A

Natural Gas

60
Q

When electricity is passes through neon it glows

A

Red

61
Q

Argon and _____ gas is used in various types of flourescent and phototubes

A

Biological Catalyst

62
Q

Atomic weight of Uranium is

A

238

63
Q

_____ is in liquid state at normal room temperature

A

Mercury

64
Q

_____ gas is used in cigarette lighters

A

Butane

65
Q

Liquefied pertoleum gas (LPG) consists of

A

Butane and Propane

66
Q

_____ is fire resistant

A

Asbestos

67
Q

____ is used for silvering of mirrors ?

A

Silver Nitrate

68
Q

Raw materials used for Manufacture of glass are

A

Sand/ Soda/ Limestone

69
Q

Solder is an alloy of

A

Tin and Lead

70
Q

Why does milk curdle

A

Fermentation of lactose

71
Q

In vulcanisation, natural rubber is heated with

A

Sulphur

72
Q

Dialysis is used for people with defective kidneys. It involves the process of

A

Osmosis

73
Q

The substance coated on plastic tape-recorder tapes is

A

Iron oxide

74
Q

Which form of phosphorus is used in safety matches ?

A

Red Phosphorus

75
Q

Permanent hardness of water can be removed by

A

Adding Washing Soda

76
Q

The first synthetic fibre made by man was

A

Nylon

77
Q

Gypsum is added to cement clinker to

A

Decrease the rate of setting of cement

78
Q

Production of chlorofluorocarbons (CFC) gas is used in which of the domestic products

A

Refrgierator

79
Q

In fireworks, the green flame is produced coz of

A

Barrium

80
Q

Mixture of two metals is called

A

Alloy

81
Q

Dynamite was discovered by

A

Alfred Nobel

GK - EDS (19 decks)

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