IAS 2001 — Chemistry

Consider the following statements with reference to the periodic table of chemical elements: 1. lonisation potential gradually decreases 'along a period. 2. In a group of elements, electron affinity decreases as the atomic weight increases. 3. In a given period, electronegativity decreases as the atomic number increases. Which of these statements(s) is/are correct?'

Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons?

An aqueous solution of copper sulphate is acidic in nature because the salt undergoes

In an atom, the order of filling up of the orbitals is governed by