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(D) Magnesium $(Mg)$ is an active metal that reacts with dilute acids to liberate hydrogen gas $(H_2)$.$1$. Reaction with dilute $HCl$: $Mg + 2HCl \ri

Vedclass · Accepted Answer

all of these

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(D) Magnesium $(Mg)$ is an active metal that reacts with dilute acids to liberate hydrogen gas $(H_2)$.$1$. Reaction with dilute $HCl$: $Mg + 2HCl \rightarrow MgCl_2 + H_2 \uparrow$$2$. Reaction with dilute $H_2SO_4$: $Mg + H_2SO_4 \rightarrow MgSO_4 + H_2 \uparrow$$3$. Reaction with very dilute $HNO_3$: $Mg + 2HNO_3 \rightarrow Mg(NO_3)_2 + H_2 \uparrow$Since $Mg$ reacts with all these dilute acids to produce $H_2$ gas,the correct option is $D$.

List-$I$ (Metal)	List-$II$ (Emitted light wavelength $(nm)$)
$A. Li$	$I. 670.8$
$B. Na$	$II. 589.2$
$C. Rb$	$III. 780.0$
$D. Cs$	$IV. 455.5$

Magnesium liberates $H_2$ gas on reaction with

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Write the reaction of thermal decomposition of sodium azide.

Match the List-$I$ with List-$II$.

List-$I$ (Metal) List-$II$ (Emitted light wavelength $(nm)$)

$A. Li$ $I. 670.8$

$B. Na$ $II. 589.2$

$C. Rb$ $III. 780.0$

$D. Cs$ $IV. 455.5$

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