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CHEMISTRY > 1. Metals Non-metals and alloys > Flashcards

1. Metals Non-metals and alloys Flashcards

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1
Q

the most reactive metal

A

Most - Potassium
Sodium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Tin
Lead
Hydrogen
Copper
Silver
Gold
least - Platinum

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1
Q
A
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1
Q

At what temperature does iron
melt?

A

1538 degree C

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2
Q

Iron boils at about____degree
Celius

A

2861

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3
Q

Which element is used to make
the coils used in water heaters

A

Nichrome
80% Nickel, 20% Chromium

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4
Q

Which of the following
elements/chemical compounds has the highest density

A

Osmium
density of 22.59 g/cm3

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5
Q

Brass is an alloy of

A

Copper Zinc

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6
Q

Which of the following gases
causes explosion in coal mines

A

Methane

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7
Q

Which of the following gases is
used for anesthesia

A

Xenon

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8
Q

Which of the following elements
found in water is responsible for
cancer

A

Arsenic

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9
Q

Which metal was earlier called
Wolfram

A

Tungsten

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10
Q

Stainless steel is a group
of iron-based alloys that contain

A

minimum of 11% chromium

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11
Q

Talonite is a combination of

A

Cobalt and Chromium

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12
Q

gas gives an orange glow when electricity is passed through it. It is generally used in fluorescent lighting

A

Neon

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13
Q

Which of the following metals in
pure form has the highest melting
point

A

Tungsten

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14
Q

Which of the following metals in
pure form has the highest melting
point

A
15
Q

Which mineral is also known as
‘fool’s gold’?

A

Pyrite

16
Q

Name the only metal that is
antibacterial.

A

Copper

17
Q

How many types of isotopes
does Scandium have?

A

13

18
Q

What is the atomic mass of
Zirconium

A

91.22

19
Q

Constantan is an alloy of

A

55% copper and 45% nickel

20
Q

What are isobars

A

Same atomic mass but different atomic no.
Calcium and Argon

21
Q

What is the Atomic Number of
the element Einsteinium

A

99

22
Q

Which of the following is used
as a substitute of mercury in
thermometers?

A

Galinstan
due to its nontoxic properties

23
Q

Which is the rarest element

A

Astatine is the rarest element in the earth’s crust occurring only as the decay product of various heavier elements

24
Q

The six commonly recognised metalloids are

A

boron, silicon, germanium, arsenic, antimony, and tellurium

CHEMISTRY (12 decks)

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