$A$ copper salt is isomorphic with $ZnSO_4$. The salt will be:

In the electronic configuration of which of the given elements,$Aufbau$ principle or $(n+l)$ rule is violated?

What is the numerical value of spin only magnetic moment of copper in $+2$ state?

The metal commonly present in brass and german silver is

Which of the following elements is man-made?

Consider $n$ as the number of lone pairs of electrons present in the equatorial position of the most stable structure of $ClF_3$. The ions from the following with $n$ number of unpaired electrons are :
$A. V^{3+}$
$B. Ti^{3+}$
$C. Cu^{2+}$
$D. Ni^{2+}$
$E. Ti^{2+}$
Choose the correct answer from the options given below :