Which of the following are issoelectronic species `Na^+, K^+, Mg^(2+), Ca^(z+), S^+2, Ar^(+2)`

Which of the following is isoelectronic : Na+ , Ar ,Mg2+ , S2-

Which of the following are isoelectronic species i.e., having the same number of electrons ? Na ^(+) , K ^(+), Mg ^(2+) , Ca ^(2+), S ^(2-) Ar ,

Which of the following element is a non-metal: Na , K , P

Which of the following are metals? Ca,P,Cl, K,N?

Which of the following is evolved when Na2CO3 is heated ?

Which of the following complex species involves d^2sp^3 hybridisation ?

Which of the following equations are balanced? Mg+O_2 -------- MgO

Which of the following species will have the largest and smallest size? Mg,Mg^(2+),Al,Al^(3+)

Which of the following solids is not an electrical conductor? Mg(s) TiO(s) I_2 (s) H_2O(s)

Which of the following donot react with cold as well as hot water: Fe,Mg,Al,K,Ca