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Which of the following statement(s) is/are correct?

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$G e H_{4} > S n H_{4} > P b H_{4} : s t a b i l i t y$

The highly poisonous nature of co arises because of its ability to form a complex with hemoglobin, which is about 300 time more stable than the oxy-hemoglobin complex

Beryl is a pyroxene which contains the ${[S i_{6} O_{18}]}^{12 -}$ ion

The gemstone emerald is beryl in which $C r^{3 +}$ ions are substituted for some $A l^{3 +}$ ions.

answer is A, B, D.

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Detailed Solution

Ans:ABD
Sol: Beryl: cyclic silicate
Pyroxene $\to$ single chain silicate

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