Calculate the percentage of water of crystallization in CuSO4.5H2O
(H = 1, O = 16, S = 32, Cu = 64)
A compound of X and Y has the empirical formula XY2. Its vapour density is equal to its empirical formula weight. Determine its molecular formula.
Match the atomic number 2, 4, 8, 15 and 19 with each of the following:
(i) A solid non-metal belonging to the third period.
(ii) A metal of valency 1.
(iii) A gaseous element with valency 2.
(iv) An element belonging to Group 2.
(v) A rare gas.
Arrange the following as per the instruction given in the brackets:
He, Ar, Ne (Increasing order of the number of electron shells)
Arrange the following as per the instruction given in the brackets:
Na, Li, K (Increasing Ionisation Energy)
Arrange the following as per the instruction given in the brackets:
F, Cl, Br (Increasing electronegativity)
Br < Cl < F
Arrange the following as per the instruction given in the brackets:
Na, K, Li (Increasing atomic size)