The atomic numbers of elements A,B,C and D are Z - 1, Z, Z + 1 and Z + 2 respectively. If B is a noble gas, choose the correct statement among the following statements :
I. A has higher electron affinity.
II. C exists in +2 oxidation state.
III. D is an alkaline earth metal.

The atomic numbers of elements A, B, C and D are Z1, Z, Z + 1 and 2 + 2 respectively. If 'B' is a noble gas, choose the correct answers from the following statements Q (1) 'A' has higher electron affinity. Q (2) 'C exists in + 2 oxidation state. Q (3) 'D' is an alkaline earth metal.

A, B, C and D are four elements with atomic numbers Z - 1, Z, Z + 1 and Z + 2 respectively. B is a noble gas. Predict whose hydroxide is less soluble in water.

A, B, C and D are four elements with atomic numbers Z - 1, Z, Z + 1 and Z + 2 respectively. B is a noble gas. Predict whose carbonate is more stable towards heat.

A, B, C and D are four elements with atomic numbers Z - 1, Z, Z + 1 and Z + 2 respectively. B is a noble gas. Predict which element exists +2 oxidation state.

A, B, C and D are four elements with atomic numbers Z - 1, Z, Z + 1 and Z + 2 respectively. B is a noble gas. Predict which element exists +1 oxidation state.

There are four elements 'P' , 'q' , 'r' and 's' having atomic numbers Z-1, Z, Z+1 and Z+2 respectively. If the element 'q' is an insert gas, select the correct answer from the following statements. (i) 'p' has most negative electron gain enthalpy in the respective period. (ii) 'r' is an alkali metal (iii) 's' exists in stable +1 oxidation state.

A, B, C and D are four elements with atomic numbers Z - 1, Z, Z + 1 and Z + 2 respectively. B is a noble gas. Predict which element possesses highest first ionisation energy.