Q1. Which one is called inorganic benzene (borazine)?
(a) B6H6
(b) N6H6
(c) C6H6
(d) B3N3H6
Q2. Which one is the most abundant on the earth crust-
(a) Al
(b) B
(c) In
(d) Ga
Q3. The chief ore of aluminum is-
(a) Kaolin
(b) Feldspar
(c) Cryolite
(d) Bauxite
Q4. Which of the following metals are extracted by electrolytic reaction method?
(a) Al
(b) Ag
(c) Cu
(d) Fe
Q5. Which is the process used for purification of bauxite are containing silica as impurity?
(a) Baeyer’s process
(b) Hall’s process
(c) Hoope’s process
(d) Serpeck’s process
Q6. Corundum is-
(a) SiO2
(b) Al2O3
(c) CaF2
(d) Cr2O3
Q7. Amphoteric oxide is/are-
(a) Al2O3
(b) P2O3
(c) TI2O3
(d) CO2
Q8. Food cans are coated with tin and not with zinc because
(a) zinc is costlier than tin
(b) zinc has a higher melting point than tin
(c) zinc is more reactive than tin
(d) zinc is less reactive than tin
Q9. Duralumin alloy consist of-
(a) Al and Mg
(b) Al and Ni
(c) Al, Mg and Ni
(d) Al, Mg, Mn and Cu
Q10. Anhydrous aluminum chloride gives fumes in most air because it is-
(a) Hygroscopic
(b) Deliquescent
(c) Efflorescent
(d) Readily Hydrolyzed
Answers
S1. Ans.(d)
S2. Ans.(a)
S3. Ans.(d)
S4. Ans.(a)
S5. Ans.(d)
S6. Ans.(b)
S7. Ans.(a)
S8. Ans.(c)
S9. Ans.(d)
S10. Ans.(d)
