Which of the following are isoelectronic species ?

Related Mcqs:

Which of the following is not a macromolecule ?

A. sand B. haemoglobin C. diamond D. maltose...

Which of the following terms is used for the mass of chlorine 35.5 ?

A. relative atomic mass B. mass number C. atomic weight D. relative isotopic mass...

When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained ?

A. 1 B. 2 C. 3 D. 4...

When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ?

A. phenol is unsaturated B. 2-bromophenol is insoluble in water C. a hydroxy group makes the benzene ring more susceptible to electrophilic attack D. acid-base reaction...

Solubility of CaF2 is 2.0×10-4 gdm-3 then Ksp of CaF2 is_______________?

A. 4.0 x 10-8 B. 3.2 x 10-11 C. 2.0 x 10-8 D. 4.0 x 10-12...