1 Mark => Chapter 10 The s- Block Elements Short Questions Answers

One mark questions:
Q.1. Why are halides of beryllium polymeric?
Ans:- the halides of Be are electron deficient as their octets are incomplete. Therefore, to complete their octets, the halides polymerize.
Q.2. Name the groups which constitute s-block elements.
Ans:- group-1 and 2
Q.3.Arrange the alkaline earth metal carbonates in the decreasing order of thermal stability.
Ans:- BaCO₃ > SrCO₃ > CaCO₃ > MgCO₃ > BeCO₃
Q.4.Write the general electronic configuration of s-block elements.
Ans:- [Noble gas] ns^1-2
Q.5.What is the chemical formula of Plaster of Paris?
Ans:- CuSO₄.1/2H₂O

Q.6.Name the compound which can be obtained by Solvay‘s process.
Ans:- Sodium carbonate

Q.7.How does the basic character of hydroxides of alkali metals vary down the group?
Ans:- Increases down the group
Q.8.Which out of MgSO₄ or BaSO₄ is more soluble in water?
Ans:- MgSO₄
Q.9.Name radioactive elements of group 1 and 2.
Ans:- Francium and Radium.
Q.10.Which elements of alkaline earth metals family do not give characteristic flame colouration?
Ans:- Be and Mg.