S Block Elements

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S Block Elements Chapter 2 Here is another quiz from S block elements chapter 2 of chemistry 2nd year(Book 2).

1. Which one of the following has the lower boiling point

A) B
B) Al
C) Ga
D) Ti

2. Which of the following mineral does not contain Al

A) Cryolite
B) Mica
C) Feldspar
D) Fluorspar

3. Aluminothermy used for on the spot welding of large iron structure is based upon the fact that

A) As compared to iron, aluminium has greater affinity for oxygen
B) As compared to aluminium, iron has greater affinity for oxygen
C) Refraction between aluminium and oxygen is endothermic
D) Reaction between iron and oxygen is endothermic

4. Which is the most amphoteric?

A) Na2CO
B) MgO
C) Al2O3
D) CaO

5. Which metal is protected by a layer of its own oxide?

A) Al
B) Ag
C) Au
D) Fe

6. Inert pair effect plays an important role in case of

A) F
B) Al
C) Si
D) Ti

7. In which of the following elements +1 oxidation state is more stable than +3

A) B
B) Al
C) Ga
D) Ti

8. Alum is not used

A) As mordant in dyeing
B) As an insecticide
C) In prufication of water
D) In tranning of leather

9. Al is more reactive than Fe but Al is less easily corroded than Fe because

A) it is a noble metal
B) Oxygen forms a protective reaction easily with water
C) Iron undergoes reaction easily with water
D) Fe form mono and divalent ions

10. In the thermite welding process we use

A) Al powder
B) Fe powder
C) Ca powder
D) Al + Fe2O3

11. Which of the following is most abundant in the earth's crust?

A) B
B) Al
C) Ga
D) Ti

12. Which of the following is a component of ruby?

A) CaCO3
B) MgCO3
C) Al2O3
D) Al(OH)3

13. A) Its empirical formula is DAl(SO4).12H20
B) Its aqueous solution is basic in nature
C) It is used in dyeing industry
D) On heating it melts in its water of crystallization

14. AlCl3 exist as dimmer because

A) Al has greater ionization potential
B) Al has larger radious
C) high charge in nucleus
D) Imcomplete p subshell