- Home
- General Science
InOrganic Chemistry -- Boron
6.
Orthoboric acid contains
- A.pyramidal BO33- units
- B.linear BO33- units
- C.T-shaped BO33- units
- D.triangular BO33- units
- Answer
- Report
Answer : [A]
7.
A boron carbide rod is used in a nuclear reactor because boron (10B) has a very
- A.low area of cross-section for capturing neutrons
- B.high area of cross-section for capturing neutrons
- C.low area of cross-section for capturing protons
- D.high area of cross-section for capturing neutrinos
- Answer
- Report
Answer : [B]
8.
Which of the following statements is incorrect?
- A.Boron carbide is used as an abrasive.
- B.Boron is used to increase the hardenability of steel
- C.Boron sesquioxide, B2O3, is used in the manufacture of borosilicate glass
- D.Orthoboric acid undergoes intramolecular hydrogen bonding.
- Answer
- Report
Answer : [D]
9.
On hydrolysis, diborane produces
- A.H3BO2 + H2O2
- B.H3BO3 + H2
- C.B2O3 + O2
- D.H3BO3 + H2O2
- Answer
- Report
Answer : [B]
10.
Which of the following statements is correct?
- A.Borosilicate glass is not heat resistant
- B.Peroxoborate is stable to high heat.
- C.Borosilicate glass has a lower coefficient of thermal expansion and is easier to work with than normal soda glass.
- D.Soda-free glass fibre is made from boric oxide, sodium silicate and phosphorus.
- Answer
- Report
Answer : [C]
|
|
||||||||||||||||||||||||||||
