1. Metals Non-metals and alloys Flashcards
the most reactive metal
Most - Potassium
Sodium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Tin
Lead
Hydrogen
Copper
Silver
Gold
least - Platinum
At what temperature does iron
melt?
1538 degree C
Iron boils at about____degree
Celius
2861
Which element is used to make
the coils used in water heaters
Nichrome
80% Nickel, 20% Chromium
Which of the following
elements/chemical compounds has the highest density
Osmium
density of 22.59 g/cm3
Brass is an alloy of
Copper Zinc
Which of the following gases
causes explosion in coal mines
Methane
Which of the following gases is
used for anesthesia
Xenon
Which of the following elements
found in water is responsible for
cancer
Arsenic
Which metal was earlier called
Wolfram
Tungsten
Stainless steel is a group
of iron-based alloys that contain
minimum of 11% chromium
Talonite is a combination of
Cobalt and Chromium
gas gives an orange glow when electricity is passed through it. It is generally used in fluorescent lighting
Neon
Which of the following metals in
pure form has the highest melting
point
Tungsten
Which of the following metals in
pure form has the highest melting
point
Which mineral is also known as
‘fool’s gold’?
Pyrite
Name the only metal that is
antibacterial.
Copper
How many types of isotopes
does Scandium have?
13
What is the atomic mass of
Zirconium
91.22
Constantan is an alloy of
55% copper and 45% nickel
What are isobars
Same atomic mass but different atomic no.
Calcium and Argon
What is the Atomic Number of
the element Einsteinium
99
Which of the following is used
as a substitute of mercury in
thermometers?
Galinstan
due to its nontoxic properties
Which is the rarest element
Astatine is the rarest element in the earth’s crust occurring only as the decay product of various heavier elements
The six commonly recognised metalloids are
boron, silicon, germanium, arsenic, antimony, and tellurium
