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Important Compounds of Boron
1. The chemical name of borax is a ____________
a) sulphur tetraborate decahydrate
b) sodium tetraborate decahydrate
c) sodium pentaborate nano hydrate
d) sodium hexa borate hexahydrate
Answer: sodium tetraborate decahydrate
2. What is the colour of borax bead in the basic radical chromium test?
a) White
b) Brown white
c) Green
d) Blue
Answer: Green
3. Tincal is ____________
a) alum
b) aluminium
c) boric acid
d) borax
Answer: borax
4. What do we get upon heating or orthoboric acid at last?
a) Metaboric acid
b) Tetraboric acid
c) Borax
d) Boron trioxide
Answer: Boron trioxide
5. Orthoboric acid is a weak monobasic Lewis acid.
a) True
b) False
View Answer
Answer: True
6. What is the chemical formula of the mineral colemanite?
a) CaB6O.5H2O
b) Na2B4O7.10H2O
c) Ca2B6O.5H2O
d) Na4O7.10H2O
Answer: Ca2B6O.5H2O
7. Which of the following salt has an outcome of blue colour as a result of a borax bead test?
a) Nickel sulphate
b) Cobalt sulphate
c) Ferrous sulphate
d) Chromium sulphate
Answer: Cobalt sulphate
8. What is inorganic benzene?
a) Boron
b) Borax
c) Boroline
d) Borazole
Answer: Borazole
9. In order to prepare borazine, we need by diborane and Ammonia in the ratio ____________
a) 5:9
b) 1:2
c) 22:23
d) 3:4
Answer: 1:2
10. Is inorganic benzene reactive than Benzene?
a) Yes
b) No
c) Maybe
d) Cannot say
Answer: Yes
Categories: p-Block Elements
Question and Answers 