Identify the correct statements from the foll | vedclass

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(B) Statement $(I)$ is correct: The chemical formula of Calgon is $Na_6(PO_3)_6$ (sodium hexametaphosphate).Statement $(II)$ is incorrect: Exhausted p

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$I \& IV$ only

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(B) Statement $(I)$ is correct: The chemical formula of Calgon is $Na_6(PO_3)_6$ (sodium hexametaphosphate).Statement $(II)$ is incorrect: Exhausted permutit (hydrated sodium aluminium silicate) is regenerated by $10 \% NaCl$ solution,not $KCl$.Statement $(III)$ is incorrect: Calcium stearate is a soap scum and is insoluble in water.Statement $(IV)$ is correct: In the structure of ice,each oxygen atom is tetrahedrally surrounded by four other oxygen atoms through hydrogen bonding.Therefore,statements $(I)$ and $(IV)$ are correct.

List-$I$ Type of Hydride	List-$II$ Example
$A$. Electron deficient hydride	$I$. $MgH_2$
$B$. Electron rich hydride	$II$. $HF$
$C$. Electron precise hydride	$III$. $B_2H_6$
$D$. Saline hydride	$IV$. $CH_4$

Identify the correct statements from the following:
$(I)$ The formula of Calgon is $Na_6(PO_3)_6$.
$(II)$ Exhausted permutit is regenerated by aqueous $KCl$ solution.
$(III)$ Calcium stearate is soluble in water.
$(IV)$ In ice crystals,each oxygen is surrounded by four oxygen atoms.

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Match List-$I$ with List-$II$

List-$I$ Type of Hydride List-$II$ Example

$A$. Electron deficient hydride $I$. $MgH_2$

$B$. Electron rich hydride $II$. $HF$

$C$. Electron precise hydride $III$. $B_2H_6$

$D$. Saline hydride $IV$. $CH_4$

Choose the correct answer from the options given below:

How can the production of dihydrogen,obtained from 'coal gasification',be increased?

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Identify the correct statements from the following:$(I)$ The formula of Calgon is $Na_6(PO_3)_6$.$(II)$ Exhausted permutit is regenerated by aqueous $KCl$ solution.$(III)$ Calcium stearate is soluble in water.$(IV)$ In ice crystals,each oxygen is surrounded by four oxygen atoms.