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CHEMISTRY > Chemical Reactions And Equations > Flashcards

Chemical Reactions And Equations Flashcards

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1
Q

It Burns with a white dazzling flame and changes into a white powder

A

Magnesium when reacting with oxygen in the air

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2
Q

Determines if a chemical reaction has taken place

A

change in state
change in colour
evolution of a gas
change in temperature

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3
Q

2Mg + O2

A

2Mgo

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4
Q

The left side of the equation

A

Reactants

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5
Q

The right side of the equation

A

Products

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6
Q

Arrow

A

The direction of the reaction

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7
Q

short representation of a reaction

A

a chemical equation

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8
Q

Zn + H2So4

A

ZnSo4 + H2

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9
Q

an unbalanced equation is also known as

A

a skeletal equation

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10
Q

Fe + H2O

A

Fe3O4 + H2

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11
Q

mass of reactants should equal to the mass of products

A

law of conservation of mass

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12
Q

Method of balancing chemical equations while making trials to balance the equation by using the smallest whole number coefficient

A

Hit and Trial Method

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13
Q

solid present as a solution in water

A

Aqueous solution

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14
Q

CaO

A

Quick Lime

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15
Q

Ca(OH)2

A

Slaked Lime

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16
Q

solution of calcium hydroxide

A

used for whitewashing walls

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17
Q

two or more reactants react to give one product

A

Combination reaction

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18
Q

a reaction where heat is released along with products

A

Exothermic reaction

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19
Q

a reaction where one reactant decomposes to form two or more products

A

Decomposition reaction

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20
Q

When a decomposition reaction is carried out by heating

A

Thermal Decomposition reaction

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21
Q

When light energy like sunlight is used to decompose a reactant

A

Photolytic Decomposition reaction

22
Q

When electricity is used for the decomposition reaction

A

Electrolytic Decomposition reaction

23
Q

ferrous sulphate decomposes to

A

ferric oxide, sulphur dioxide and sulphur trioxide

24
Q

Use of calcium oxide

A

manufacture cement

25
Q

Nitrogen dioxide

A

brown fumes

26
Q

white silver chloride turns

A

grey under sunlight

27
Q

a reaction where energy is absorbed

A

endothermic reaction

28
Q

the reactions of silver chloride and silver bromide with sunlight are used in

A

black and white photography

29
Q

iron nail dipped in copper sulphate solution becomes

A

brownish in color

30
Q

the blue colour of copper sulphate solution fades away

A

when iron nails are dipped in copper sulfate solution

31
Q

When a higher reactive metal displaces a lesser reactive metal from its solution then it is known as

A

A displacement reaction

32
Q

insoluble substance formed

A

precipitate

33
Q

precipitate reaction

A

any reaction that produces a precipitate

34
Q

reactions where there is an exchange of ions between the reactants

A

double displacement reaction

35
Q

oxygen is added to copper

A

a layer of black substance is formed called copper oxide

36
Q

hydrogen gas passed through heated CuO

A

the reverse reaction takes place and the black coating turns brown again

37
Q

if a substance gains oxygen during a reaction

A

oxidized substance

38
Q

if a substance loses oxygen during a reaction

A

reduced substance

39
Q

a reaction where one reactant gets oxidized while the other gets reduced

A

redox reaction

40
Q

the substance getting oxidized is

A

a reducing agent

41
Q

the substance getting reduced is

A

an oxidizing agent

42
Q

oxidized reaction

A

addition of oxygen or loss of hydrogen

43
Q

reduced reaction

A

addition of hydrogen or loss of oxygen

44
Q

shiny iron particles get coated with reddish-brown powder

A

rusting of iron

45
Q

when metal is attacked by other substances in its surroundings like moisture, acids, etc

A

the process is known to be corrosion

46
Q

when fats and oils are oxidized

A

they become rancid

47
Q

rancid substances

A

change their taste and smell

48
Q

substances that prevent oxidation

A

antioxidants

49
Q

ways to slow down oxidation

A

keeping food in airtight containers

50
Q

chips manufacturer flush chips bags

A

with nitrogen in order to prevent them from getting oxidized

CHEMISTRY (3 decks)

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