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Chemistry > Metals and non metals > Flashcards

Metals and non metals Flashcards

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1
Q

Which are the most malleable metals??

A

Gold and silver

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2
Q

Which is the most ductile metal??

A

Gold a wire of 2 km can be drawn from it

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3
Q

Best conductors of heat?

A

Silver and copper

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4
Q

Poor conductors of heat

A

Lead and mercury

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5
Q

Non metal which is a liquid

A

Bromine

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6
Q

Metal that exist as liquid in room temperature?

A

Mercury

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7
Q

Metals that has low melting point ?

A

Gallium and Caesium

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8
Q

A non metal that is lustrous

A

Iodine

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9
Q

What are the alkali metals

A

Sodium, potassium,lithium

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10
Q

Alkali metals properties

A

Soft,low densities, low melting point

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11
Q

General representation of metals burning in air

A

Metal + oxygen = metal oxides

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12
Q

What happens when copper is burnt in air

A

Copper oxide is formed , it is black in color

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13
Q

What happens when aluminum is burnt in air

A

Aluminum oxide is formed

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14
Q

Nature of metal oxides

A

Basic

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15
Q

Nature of non metal oxides

A

Acidic

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16
Q

Nature of aluminium and zinc oxides

A

Amphoteric

17
Q

What is amphoteric oxides?

A

Oxides that behaves both acidic and basic

18
Q

What happens when metal oxides react with acid or base

A

Salt and water is produced
Al203+HCL = Alcl3+ h20
Al203+NAOH = NaAl203+h2o

19
Q

At ordinary temp surfaces of which all metals are covered with thin oxide layer

A

Mg , Al,Zn,lead

20
Q

What does the thin oxide layer do?

A

Prevent further oxidation

21
Q

Which metal does not react with oxygen at high temp

A

Silver and gold

22
Q

What is anodizing

A

It is a process of forming thick oxide layer of aluminum. The layer prevents further corrosion

23
Q

During anodizing, what is the anode and what is it electrolyze with?where is the oxygen gas evolved?

A

Aluminum is the anode
Dilute sulphuric acid
Oxygen gas is evolved at the anode

24
Q

Metals react with water to produce what?

A

Metal oxide and hydrogen

25
Q

Metal oxides that dissolve in water further dissolve to produce what?

A

Metal hydroxide

26
Q

Which metals react violently with cold water

A

Sodium and potassium

27
Q

Why does calcium starts floating when reacts with water

A

The bubbles of h2 stick to the surface and it starts floating

28
Q

Which metal react with hot water

A

Magnesium

29
Q

Does magnesium float

A

Yes because of h2 bubbles

30
Q

Which all metals do not react with water but reacts with steam

A

Aluminum, iron and zinc

31
Q

Which metal does not react with water

A

Gold , silver , lead , copper

Chemistry (2 decks)

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