Which of the following is a binary compound? k2so4 ni(oh)2 baco3 mn2o7

Answer : The correct option is, (D)

Explanation :

Binary ionic compound : It is a type of compound that is made up of the ions of the two different elements in which one element is a metal and another element is a non-metal.  It is only made up of two elements.

From the given options, option (A) is a binary ionic compound because in this compound Mn is a metal which combine with the an oxygen non-metal element.

While the other options are not a binary compound because it is made up of more than two elements.

Hence, the is a binary ionic compound.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.