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Physical Properties

7 % by weight...

Question

7% by weight of earth's crust is made up of the white, shiny and highly reactive metal called __.

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Solution

Here we are only talking about the earth’s crust and not the whole planet. So Iron is ruled out. 7% of the earth’s crust is Aluminum (in its combined state).

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Approximately about 90% of earth's crust is made up of _____

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Q. Element M is a shiny and highly reactive metal and element X is a highly reactive non metal. They react to form a compound MX, a colourless brittle white solid. MX conducts electricity in aqueous solution and in molten state. When chlorine gas is bubled through an aqueous solution, containing MX, a reddish-brown liquid appears and

{C l}^{-}

ions are formed.

2 M X + {C l}_{2} ⟶ 2 M C l + X_{2}

X_{2}

is decolourised by unsaturated hydrocarbon and aq solution of MX containing 1.19 g MX in 100g

H_{2} O

{- 3.72}^{0} C

. Molar depression constant of

H_{2} O

{1.86}^{0}

{m o l}^{- 1}

kg. M is potassium.
if true enter 1, else enter 0.

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