MCQ
Which pair of atoms form strongest ionic bond?
- A$Al$ and $As$
- B$Al$ and $N$
- C$Al$ and $Se$
- D$Al$ and $O$
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$1.$ Compound $X$ is
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$2.$ The major compound $Y$ is
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Give the answer question $1$ and $2.$
Consider the following statements about borax :
$a.$ Each boron atom has four $B-O$ bonds
$b.$ Each boron atom has three $B-O$ bonds
$c.$ Two boron atoms have four $B-O$ bonds while other two have three $B-O$ bonds
$d.$ Each boron atom has one $-OH$ groups
Select correct statement(s) :
$S_2O_8^{2-} + 2e^- \longrightarrow 2SO_4^{2-}$
$Mn^{2+} + 4H_2O \longrightarrow MnO_4 + 8H^+ + 5e^-$
How many moles of $S_2O_8^{2-}$ are required to oxidise $1\, mole$ of $Mn^{ 2+}$ ?