When concentrated $H_2SO_4$ is added to dry $KNO_3$,brown fumes evolve. These fumes are

Discuss the trends in chemical reactivity of group $15$ elements.

The gases liberated when zinc reacts with dilute and conc. $HNO_3$ respectively are

Which of the following statements is $NOT$ true?

Which of the following is an acidic oxide?

The electronegativity of a group $13$ element '$E$' is the same as that of $Ge$ (on the Pauling scale and up to one decimal point). The $CORRECT$ statements about $E^{3+}$ are:
$A$. It can act as a reducing agent.
$B$. It can act as an oxidizing agent.
$C$. $E^{3+}$ is more stable than $E^+$.
$D$. The standard electrode potential value for $E^{3+}/E$ is positive.