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Physical and Chemical Principles > General Chemistry (Part 3) > Flashcards

General Chemistry (Part 3) Flashcards

1
Q

A polymeric substance used to make parachute is:

A

viscose

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2
Q

Drinking soda is:

A

acidic

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3
Q

The cathode of a lead storage battery is made up of:

A

lead

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4
Q

Which one of the following is radioactive?

Cesium | Platinum | Strontium | Thorium

A

thorium

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5
Q

Aluminum can be purified by:

A

electrolysis

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6
Q

Impure camphor is purified by:

A

sublimation

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7
Q

Greenhouse effect is caused by:

A

carbon dioxide

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8
Q

Type metal used in printing press is an alloy of:

A

lead and antimony

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9
Q

Sour taste of Coca Cola is due to the presence of:

A

phosphoric acid

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10
Q

Bhopal gas tragedy is associated with leakage of:

A

methyl isocyanate

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11
Q

Iodized salt is beneficial for:

A

thyroid function

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12
Q

The acid rain destroys vegetations because it contains:

A

sulfuric acid

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13
Q

Diamonds are glittering and attractive because light Incident on them undergoes:

A

multiple internal reflections

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14
Q

The substance most commonly used as a food preservative is:

A

sodium salt of benzoic acid

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15
Q

Catalyst is a substance which:

increases the rate of the reaction | decreases the rate of reaction | has no action on the rate of the reaction| none of these.

A

none of these

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16
Q

Which of the following gases is most toxic?

Carbon dioxide | Carbon monoxide | Sulphur dioxide | Chlorine

A

carbon monoxide

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17
Q

Sour milk contains:

A

lactic acid

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18
Q

The acid used in lead storage cells is:

A

sulfuric acid

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19
Q

Alum stops bleeding in minor cuts because of:

A

coagulation

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20
Q

Plaster of Paris is made by partial dehydration of:

A

gypsum salt

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21
Q

Water can be separated from alcohol water mixture by

A

distillation

22
Q

Milk sugar is:

A

lactose

23
Q

Petroleum is a mixture of:

A

hydrocarbons

24
Q

The gas used for filling weather balloons is:

A

helium

25
Q

Hydrogen is not found in atmosphere because:

A

It is the lightest gas.

26
Q

Who discovered the atom bomb?

A

Otto Hahn

27
Q

Which one of the following organic compounds has fruity smell?

Alcohol | Aldehyde | Ester | Ether

A

ester

28
Q

What material is used to make electric heater coil?

A

nichrome

29
Q

Byproduct obtained by soap industry is:

A

glycerol

30
Q

Polythene is polymer of:

A

ethylene

31
Q

When formaldehyde and potassium hydroxide are heated, we get:

A

methyl alcohol

32
Q

When concentrated H2S04 is added to dry KNO3 brown fumes are evolved. These fumes are due to:

A

NO2

33
Q

The polymer used in making plastic crockery is:

A

melamine

34
Q

Vulcanization of rubber is carried out by adding:

A

sulfur

35
Q

Which gas is used as fire extinguisher?

A

carbon dioxide

36
Q

Which one of the following is extensively used for sterilizing water?

Bleaching powder | Alum | Borax powder | Soda powder

A

bleaching powder

37
Q

The major constituent of air is:

A

nitrogen

38
Q

Rusting of iron takes place due to:

A

oxidation

39
Q

German silver used for making utensils is an alloy of:

A

copper, zinc, & nickel

40
Q

The purity of gold is expressed in carats. The purest form of gold is:

A

24 karats

41
Q

Petroleum consists of a mixture of:

A

hydrocarbons

42
Q

The luster of the metals is because of:

A

Reflection of light due to the presence of free electrons.

43
Q

One of the following is used to dissolve noble metals. That is:

Nitric acid | Hydrochloric acid | Sulfuric acid | Aqua regia

A

aqua regia

44
Q

An emulsion is a colloid of a:

A

liquid in a liquid

45
Q

Percentage of carbon in steel is ranges from:

A

1 to 5

46
Q

Which of the following is not present in German silver?

Copper | Nickel | Silver | Zinc

A

silver

47
Q

The major harmful gas emitted by automobile vehicles which causes air pollution is:

A

carbon monoxide

48
Q

Which one of the following is a major greenhouse gas?

A

carbon dioxide

49
Q

Pasteurization is the process in which milk is heated to:

A

63°C for 30 minutes

50
Q

The freezer in a refrigerator is fitted near the top:

A

It facilitates convection currents.

Physical and Chemical Principles (6 decks)

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