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Chemistry > Quarterly Exam- Chemistry Ls 1,2,3,4 > Flashcards

Quarterly Exam- Chemistry Ls 1,2,3,4 Flashcards

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1
Q

Explain the types of Treated water.

A

Pg 55

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2
Q

On what does boiling point depends and how are thery propotional to boiling point.

A

Directly propotional to atmospheric pressure and also directly propotional to dissolved impurities

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3
Q

On what does freezing point depends and how are thery propotional to freezing point.

A

Directly propotional to atmospheric pressure (if pressure increases, freezing points falls below 0°C and thus increseing the freezing point) and also directly propotional to dissolved impurities.

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4
Q

What is specific latent heat of vapourization and what is its value?

A

Value-2260 J/g or 540 cal/g

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5
Q

1 cm3 of water changes to approzimately ___ cm3 of steam at 100° C.

A

1760 cm3 of steam.

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6
Q

92cm3 of water on freezing changes into___cm3 of ice.

A

100cm3

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7
Q

What is specific latent heat of solidification and what is irs value?

A

Value-336J/g or 80 cal/g

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8
Q

What is specific heat capacity and what is its value?

A

Value-4.2 J/g° C or 1 cal/g

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9
Q

Tell about the solvent properties of water

A

Pg 55

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10
Q

What is percentage of carbon dioxide, oxygen and nitrogen in the air?

A

Carbon dioxide-0.03%
Oxygen-21%
Nitrogen- 78%

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11
Q

Why does the reaction of magnesium stop in the expxermient to show that burning magnesium reacts with steam produces hydrogen?

A

Magnesium oxide, formed by the action of steam on the metal, continues sticking to the surface of metal. Thus fresh surface of the metal is not exposed, with the result the reaction stops.

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12
Q

What is the metal reactivity series?

A

Pg 62

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13
Q

What are the examples of deliquesent and hygroscopic substances?

A

Deliquesent- calcium chloride, magnesium chloride, mercury nitrate, zinc chloride.
Hygroscopic- quick lime (calcium oxide), conc. sulphuric acid, phosphorus pentoxide.

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14
Q

What causes temporary and permanent hardness of water?

A

Pg 66,67

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15
Q

Permanent hardness is removed by treating hte water with____(also called as washing soda).

A

sodium carbonate.

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16
Q

Define solution. What are its properties

A

Pg 67

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17
Q

What are the factors which influence the rate of dissolution of solute in a solvent?

A

Pg 68

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18
Q

Define solubility.

A

Pg 69

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19
Q

Differences in solubilities of substances depend upon?

A

a) Nature of solute
b) Nature of solvent
c) Temperature

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20
Q

What is the the formula to find the solubility of a solute?

A

Pg 69

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21
Q

Name five solvents other than water and their solutes.

A

Pg 71,72

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22
Q
  1. Solids whose solubility remains unaffected with rise in temperature.
  2. Solids whose solubility decreases with the rise in temperature.
  3. Solids whose solubility increases with the rise in temperature.
A

Pg 69,70

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23
Q

What are the solvents in everyday life?

A

Pg 72

24
Q

What is a chemical change?

A

Pg 33

25
Q

What is a chemical reaction?

A

Pg 36

26
Q

Define chemical composition reactions with examples

A

Pg 37

27
Q

Define chemical decomposition reactions with examples

A

Pg 37,38

28
Q

Define chemical displacement reactions with examples

A

Pg 38

29
Q

Define chemical double decomposition reactions with examples

A

Pg 38,39

30
Q

Define catalytic reactions with examples

A

Pg 39

31
Q

Define reversible reactions with examples

A

Pg 39

32
Q

Define Thermal dissociation reactions with examples

A

Pg 40

33
Q

Define redox reactions with examples

A

Pg 40

34
Q

What are the conditions for chemical change (chemical reaction)?

A

Pg 41

35
Q

Define exothermic and endothermic reactions with examples.

A

Pg 42,43

36
Q

Define photochemical reactions with examples

A

Pg 43

37
Q

Define electrochemical reactions with examples.

A

Pg 44

38
Q

What are the tests for water?

A

Pg 63

39
Q

What is combustion?

A

Pg 44

40
Q

What is the supporter of combustion other than oygen?

A

Nitrogen(I) oxide

41
Q

Examples of combustion taking place in absence of air

A

Pg 45

42
Q

What are the factors on which rate of combustion depends?

A

Pg 45

43
Q

State the points of dalton’s atomic theory and modern atomic theory.

A

Pg 83,84

44
Q

What is the charge and mass of electron and do they depend upon the gas within the discharge tube?

A

Pg 84

45
Q

What is the charge and mass of protron and do they depend upon the gas within the discharge tube?

A

Pg 85

46
Q

What was the contradiction of J.J Thomson’s atmoic model?

A

Pg 85

47
Q

What was the contradiction of Rutherford’s atmoic model and who solved it?

A

Pg 87

48
Q

What are the characteristics of electrons?

A

Pg 84

49
Q

What are the characteristics of protrons?

A

Pg 85

50
Q 
How many isotopes do the following elements have:
Chlorine
Hydrogen
Carbon
Neon
Potassium
Uranium
Oxygen 
and what are they?
A

Pg 99, 100

51
Q

What are the properties of isotopes?

A

Pg 100

52
Q

What is a chemical bond?

A

Pg 104

53
Q

Define octet and duplet structure.

A

Pg 104, 105

54
Q

Define ionic and covalent bond.

A

Pg 106, 107

55
Q

Define polar and non polar covalent bond with examples

A

Pg 108

56
Q

Define ingition temperature

A

Pg 45

Chemistry (3 decks)

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