Gun metal is an alloy of
$Cu$ and $Al$
$Cu,\,Sn$ and $Zn$
$Cu,\,Zn$ and $Ni$
$Cu$ and $Sn$
Which one of the following ions is colourless
Which of the following will be coloured ion :
Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?
Which of the following statements are correct?
$(A)$ The $M ^{3+} / M ^{2+}$ reduction potential for iron is greater than manganese
$(B)$ The higher oxidation states of first row $d$ block elements get stabilized by oxide ion.
$(C)$ Aqueous solution of $Cr ^{2+}$ can liberate hydrogen from dilute acid.
$(D)$ Magnetic moment of $V ^{2+}$ is observed between $4.4-5.2\,BM$
Choose the correct answer from the options given below:
Which of the following statement is not true