Boron - Quiz
A) 10% B) 19.9% C) 50% D) 80.1%
A) 17B B) 11B C) 7B D) 10B
A) 3.5×10−22 s B) 80.1 s C) 19.9 s D) 3.5×10−10 s
A) Superconductivity B) Proton emission C) Alpha decay D) Nuclear halo
A) 1/2 B) 1 C) 3/2 D) 3
A) 17B B) 7B C) 10B D) 11B
A) β-rhombohedral B) α-rhombohedral C) β-tetragonal D) γ-orthorhombic
A) Three B) Six C) Four D) Five
A) 100–500 °C B) 2200–2500 °C C) 1800–2200 °C D) 1500–1800 °C
A) Above 160 GPa B) 12–20 GPa C) 50–80 GPa D) 1–5 GPa
A) Above 100 K B) Between 20–30 K C) Below 6–12 K D) Exactly 0 K
A) Carbon B) Tincal C) Sassolite D) Borax
A) Oxygen B) Carbon C) Potassium D) Iron
A) Boracium B) Tincal C) Sal sedativum D) Sassolite
A) 700 AD B) 1600 AD C) 300 AD D) 1808 AD
A) Jabir ibn Hayyan B) Sir Humphry Davy C) Ezekiel Weintraub D) Georgius Agricola
A) Francis Marion Smith B) Jöns Jacob Berzelius C) Marco Polo D) Georgius Agricola
A) Preservative B) Flux C) Catalyst D) Glaze
A) 1808 B) 1909 C) 1777 D) 1824
A) Tincal B) Sal sedativum C) Sassolite D) Boracium
A) Sassolite B) Borax C) Boracium D) Tincal
A) 1872 B) 1827 C) 1909 D) 1808
A) Jöns Jacob Berzelius B) Francis Marion Smith C) Sir Humphry Davy D) Ezekiel Weintraub
A) Sassolite B) Boron C) Tincal D) Boracium
A) Copper B) Potassium C) Iron D) Gold
A) Agricola and Marco Polo B) Smith and Weintraub C) Davy and Berzelius D) Gay-Lussac and Thénard
A) Sir Humphry Davy B) Jöns Jacob Berzelius C) Louis Jacques Thénard D) Ezekiel Weintraub
A) Jöns Jacob Berzelius B) Sir Humphry Davy C) Ezekiel Weintraub D) Joseph Louis Gay-Lussac
A) Borax B) Sassolite C) Boric acid D) Sal sedativum
A) Silvery liquid B) Clear crystal C) White gas D) Brown powder
A) Radioactive decay B) Cosmic ray spallation C) Photosynthesis D) Stellar nucleosynthesis
A) 1 percent B) 0.01 percent C) 0.001 percent D) 0.1 percent
A) USA B) Russia C) China D) Turkey
A) Water purification B) Fuel additive C) Additive in fiberglass D) Food preservative
A) Greater thermal shock resistance B) Better electrical insulation C) Lower cost D) Brighter color
A) Boron-15 B) Boron-12 C) Boron-5 D) Boron-10
A) Beneficial B) Neutral C) Nutritional D) Toxic
A) Ocean water B) Human blood C) Meteoroids D) Atmospheric air
A) As a lubricant B) As a semiconductor C) As a bleach D) As a fertilizer
A) Metalloid B) Alkali metal C) Halogen D) Noble gas
A) Aluminum B) Boron C) Silicon D) Carbon
A) It has more electrons in the p-orbital B) It forms stable covalent networks C) It reflects its electropositive character D) It has a larger atomic radius
A) It reacts instantly with all known substances B) It is too abundant to be valuable C) The pure material is extremely difficult to prepare D) It is highly radioactive
A) Reaction of boron halides with nitrogen B) Decomposition of diborane at high temperatures C) Reduction of boric oxide with magnesium D) Zone melting of volcanic ash
A) A protective oxide or hydroxide layer forms B) It turns into liquid C) It immediately combusts D) It reacts with nitrogen to form nitrides
A) Boron trioxide B) Boric acid C) Borane D) Boron nitride
A) Carbon B) Silicon C) Magnesium D) Aluminum
A) I B) IV C) III D) II
A) Nitrogen B) Carbon C) Silicon D) Aluminium
A) Boron spheres B) Boron chains C) Boron cubes D) Boron icosahedra
A) From boron halides B) From pure elemental boron C) From borates D) From diborane decomposition
A) The Aufbau principle B) The octet rule C) The Pauli exclusion principle D) Hund's rule
A) BX2 B) BX4 C) BX3 D) B2X6
A) Planar trigonal B) Tetrahedral C) Octahedral D) Linear
A) Lewis acidic B) Lewis basic C) Strongly alkaline D) Neutral
A) Fluoroboride B) Borate C) Tetrafluoroborate D) Trifluoroborate
A) Food processing B) Textile C) Pharmaceutical D) Petrochemical
A) BCl3 B) BF3 C) BBr3 D) B2F4
A) B7Br7 B) B2Cl6 C) B4H10 D) B3F9
A) Tetraborate anions B) Monoborate anions C) Pentaborate anions D) Triborate anions
A) Calcium B) Potassium C) Magnesium D) Sodium
A) B-H bonds B) B-B bonds C) B-O-B bonds D) B-C bonds
A) B(OR)3 B) B(OH)3 C) R2BOH D) BX3
A) E.J. Corey B) Akira Suzuki C) Linus Pauling D) Herbert C. Brown
A) Oxidation B) Acid-base reaction C) Carbothermic reduction D) Electrolysis |
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