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When $PbO_2$ reacts with conc. $HNO_3$,the gas evolved is:
MediumIIT 2005
View SolutionWhich of the following elements does not form stable diatomic molecules?
What is the active species in Nessler's reagent used for the identification of ammonia?
Medium
View SolutionWhich reaction$(s)$ among the following produce dinitrogen?
$1. NH_4Cl(aq) + NaNO_2(aq) \longrightarrow$
$2. NH_2CONH_2 + 2H_2O \longrightarrow$
$3. Ba(N_3)_2 \longrightarrow$
$4. NH_4Cl + Ca(OH)_2 \longrightarrow$
$1. NH_4Cl(aq) + NaNO_2(aq) \longrightarrow$
$2. NH_2CONH_2 + 2H_2O \longrightarrow$
$3. Ba(N_3)_2 \longrightarrow$
$4. NH_4Cl + Ca(OH)_2 \longrightarrow$
The element which forms oxides in all oxidation states from $+I$ to $+V$ is
MediumAIIMS 2004
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