Boron And Aluminum MCQs [Chemistry]

Set of Important MCQs on Boron And Aluminum Chemistry in inorganic chemistry for the preparation of tests for chemistry and biology. 

AICI, acts as a strong Lewis acid because it

  1. A covalent compound
  2. Electron-deficient
  3. Readily hydrolyzed
  4. An ionic compound

Question’s Answer: Electron-deficient


Which of the mentioned has +3 oxidation state?

  1. In & Tl
  2. B & Al
  3. B & In
  4. Al & TI

Question’s Answer: B & Al


Which of the mentioned are oxides ores of Aluminum?

  1. Corundum
  2. Diaspore
  3. Bauxite
  4. All A, B, and C

Question’s Answer: All A, B, and C


Which of the mentioned are sulphate ores of aluminum?

  1. Kaolin
  2. Cryolite
  3. Feldspar
  4. Alumite

Question’s Answer: Alumite


The formula of Bauxite is

  1. Al2O3
  2. Na3 AIF6
  3. Al2O3 H2O
  4. Al2O3 2H2O

Question’s Answer: Al2O3 2H2O


The purification of Bauxite can be carried out

  1. Serpek’s process
  2. Hall’s process
  3. Baeyer’s process:
  4. None of A, B, and C

Question’s Answer: None of A, B, and C


In the purification of bauxite, the ore is fused with sodium carbonate in the ________  process.

  1. Baeyer’s process
  2. Hall’s process
  3. Serpeck’s process
  4. None of A, B, and C

Question’s Answer: Hall’s process


Aluminum is helpful and used for which of the following?

  1. Reducing agent
  2. Making alloys
  3. Making utensils & frames
  4. All A, B, and C

Question’s Answer: All A, B, and C

Magnalium is alloy of aluminum and magnesium which is helpful and used in ______ .

  1. Scientific apparatus.
  2. Boat machinery
  3. Rail road cars
  4. Aircraft parts

Question’s Answer: Aircraft parts


What is the formula of hexa borane?

  1. B4 H10
  2. B5 H9
  3. B6 H10
  4. B8 H12

Question’s Answer: B6 H10


Which is an inflammable colorless gas with a sticky sweet odour and is extremely toxic?

  1. B4 H10
  2. B₂ H6
  3. B5 H9
  4. B6 H10

Question’s Answer: B₂ H6


Diborane is helpful and used ___

  1. As reducing agent

  1. For welding torches
  2. For high energy fuel
  3. All A, B, and C

Question’s Answer: All A, B, and C

What is the formula of Borax?

  1. Na2B4O7 12H20
  2. Na2B4O7 8H2O
  3. Na2B4O7 10H₂O
  4. Na2B4O7 6H2O

Question’s Answer: Na2B4O7 10H₂O


What is the formula of Tetraboric acid?

  1. H2B4O7
  2. HBO2
  3. HзBOз
  4. H6B4O2

Question’s Answer: H2B4O7


Boric acid is helpful and used  in ____ .

  1. tanning industry
  2. medicine as an antiseptic
  3. manufacture of pottery glaze
  4. All A, B, and C

Question’s Answer: All A, B, and C


Borax exists in which form?

  1. Borax glass
  2. Octahedral borax
  3. Ordinary borax
  4. All A, B, and C

Question’s Answer: All A, B, and C

What is the formula of borax glass?

  1. Na₂B4O7.10H₂O
  2. Na₂B4O7
  3. Na₂B4O7.5H₂O
  4. None of these

Question’s Answer: Na₂B4O7


Sodium tetraborate is helpful and used ______ .

  1. As alkaline buffer in dying & bleaching process
  2. In enameling and making glaze
  3. In manufacture of optical glass
  4. All A, B, and C.

Question’s Answer: All A, B, and C


AICI3 is helpful and used in

  1. In borax bead test
  2. Manufacturing of petrol
  3. Preservation of food
  4. All A, B, and C

Question’s Answer: Manufacturing of petrol

Which of the mentioned reacts violently with water?

  1. AIH3
  2. AICl3
  3. Al2Cl6
  4. LiAIH4

Question’s Answer: LiAIH4


Alum is a _____.

  1. Double salt
  2. Acidic salt
  3. Basic salt
  4. Complex salt

Question’s Answer: Double salt

 

Boron and aluminum halides are electron-deficient compounds. In this respect, they act as

  1. Oxidizing agent
  2. Lewis base
  3. Lewis acid

D Reducing agent

Question’s Answer: Lewis acid


Which one of the following elements shows the most stable oxidation state of +1?

  1. Al
  2. TI
  3. In
  4. Ga

Question’s Answer: TI


Boron exhibits diagonal relationship with which of the following?

  1. Mg
  2. Si
  3. Al
  4. Ge

Question’s Answer: Si


Alums are generally helpful and used in ______ .

  1. In dyeing and water proofing of fabric
  2. In arrest bleeding
  3. In water purification
  4. All A, B, and C

Question’s Answer: All A, B, and C


Boron does not form B3+ ion because  it has __________ .

  1. high electronegativity
  2. It has small size and high ionization energy
  3. high charge density (charge/radius ratio)
  4. None of these

Question’s Answer: It has small size and high ionization energy

The aqueous solution of sodium silicate is ______.

  1. Acidic
  2. Amphoteric
  3. Basic
  4. Neutral

Question’s Answer: Basic


AICI3 fumes in air because of

  1. Hydration
  2. Dehydration
  3. Hydrolysis
  4. Oxidation

Question’s Answer: Hydrolysis


Which of the mentioned statements about anhydrous aluminum chloride is true?

  1. It is not easily hydrolyzed
  2. It exist as AlCl3 molecules
  3. It sublimes at 100°C under vacuum
  4. None of these

Question’s Answer: It exist as AlCl3 molecules


Which of the mentioned statements is not true for both B and Al?

  1. They burn in oxygen to give oxides at high temperature
  2. Their halides are Lewis acids
  3. They combine with nitrogen to form nitrides
  4. They react with HCl to form chlorides

Question’s Answer: It exist as AlCl3 molecules

Amorphous boron on burning in air forms __ .

  1. Mixture of B2O3 and BN
  2. Only B2O3
  3. Only BN
  4. B(OH)3

Question’s Answer: Mixture of B2O3 and BN


Which of the mentioned is expected not to exist?

  1. B5H11
  2. B5H10
  3. B6H10
  4. B5H8

Question’s Answer: B5H10


What is the formula of chrome yellow?

  1. PbCrO4
  2. K2CrO4
  3. K2Cr2O7
  4. None of these

Question’s Answer: PbCrO4

The accurate order of atomic radii of Group IIIA elements is

  1. B<Al<Ga-In
  2. B<Al-Ga<In
  3. B<Al<Ga<In
  4. B<Ga<Al-In

Question’s Answer: B<Al-Ga<In


In the aluminothermite process, aluminum acts as

  1. An oxidizing agent
  2. A flux
  3. A solder
  4. A reducing agent

Question’s Answer: A reducing agent


When borax is intensely heated, it gives __________ .

  1. B2O3
  2. NaBO2+ B203
  3. NaBO₂
  4. Na2B4O7

Question’s Answer: NaBO2+ B203


Which of the mentioned forms electron deficient compounds

  1. Al
  2. B
  3. Both B & Al
  4. None of these

Question’s Answer: Both B & Al


Which of the mentioned elements are typical non-metals?

  1. B & Al
  2. Al & Si
  3. B & Si
  4. All A, B, and C

Question’s Answer: B & Si


The compound which does not act as Lewis acid is

  1. BF3
  2. BeCl2
  3. AlCl3
  4. SnCl4

Question’s Answer: BeCl2


When orthoboric acid is heated intensely, it gives  _________ .

  1. HBO2
  2. H₂B3O7
  3. B2O3
  4. B

Question’s Answer: B2O3

Which of the mentioned statements is not true about potash alum?

  1. Its empirical formula is KAI(SO4)2-
  2. Its aqueous solution is basic in nature
  3. It is helpful and used in dyeing industry
  4. On heating, it melts in its water of crystallization.

Question’s Answer: Its aqueous solution is basic in nature


Which one of the following statements regarding BF3 is not true?

  1. It is a Lewis acid
  2. It is an electron-deficient compound
  3. It is an ionic compound

  1. It forms adducts

Question’s Answer: It is an ionic compound


All the member of group III A are metals excluding ___________.

  1. Ga
  2. Al
  3. B
  4. In

Question’s Answer: B


What is the valence shell electronic configuration of group III A?

  1. ns1 p2
  2. ns2 p3
  3. ns2 p1
  4. ns2 p2

Question’s Answer: ns2 p1


Which of the mentioned element gives violet color to flame?

  1. Aluminum
  2. Indium
  3. Thallium
  4. Gallium

Question’s Answer: Gallium


The aluminium salt commonly helpful and used to stop bleeding is

  1. Aluminium sulphate
  2. Aluminium chloride

C.. Potash alum

  1. Aluminium ‘luoride

Question’s Answer: Potash alum


Aluminum does not corrode as does iron, because  _____ .

  1. Al does not react with O2
  2. A protective layer of Al2O3 forms on the metal surface
  3. Al is harder to oxidize than is Fe
  4. Fe gives cathode protection to Al

Question’s Answer: A protective layer of Al2O3 forms on the metal surface


Which of the mentioned statement is false?

  1. An alloy is a mixture of two or more metals
  2. An alloy is a mixture of two or more metal and non-metal elements that have metallic properties
  3. An alloy has a fixed composition
  4. An amalgam is an alloy containing Hg

Question’s Answer: An alloy has a fixed composition


The role of the mineral cryolite. Na AIF, in the Hall process for aluminum production is

  1. In the molten state, it is a solvent for alumina, AlgO3
  2. It is a chemical reducing agent
  3. It forms a slag to remove impurities
  4. It is the source of aluminum (the ore)

Question’s Answer: In the molten state, it is a solvent for alumina, AlgO3


The Hall process involves the reduction of Al2O3 to aluminum by ______ .

  1. Carbon (coke)
  2. Carbon monoxide
  3. Electrolysis
  4. Molecular hydrogen

Question’s Answer: Electrolysis


Aluminum is an active metal, but does not corrode as iron does because

  1. Al does not react with Oz
  2. A protective layer of Al2O3 forms on the metal surface
  3. Al is harder to oxidize than is Fe
  4. Aluminum has a high tensile strength

Question’s Answer: A protective layer of Al2O3 forms on the metal surface


Which of the mentioned is not a property of aluminum?

  1. An efficient electrical conductor
  2. Toxic to humans
  3. Is amphoteric
  4. A low density compared to other metals

Question’s Answer: Toxic to humans


Aluminum hydroxide Al(OH)3 is ______ .

  1. An amphoteric hydroxide
  2. An acid
  3. A base
  4. An explosive hydroxide

Question’s Answer: An amphoteric hydroxide


Which of the mentioned is not alum?

  1. KAI(SO4)2 12H2O
  2. NaAl(SO4)2 12H2O
  3. FeAl(SO4)2 12H2O
  4. NH4Fe(SO4)2 12H2O

Question’s Answer: FeAl(SO4)2 12H2O


Duralumin is an alloy of

  1. Mg + Al+ Cu + Mn
  2. Al+ Mg + Mn
  3. Mg + Al+ Cu
  4. Mg + Al

Question’s Answer: Mg + Al+ Cu + Mn


Mangalium is an alloy of

  1. Mg + Al+ Cu
  2. Mg + Al + Mn
  3. Al + Mg
  4. Mg + Al + Cu + Mn

Question’s Answer: Al + Mg


BCl3 is a planar molecule, because B atom is ________ hybridized.

  1. sp-hybridized
  2. sp³-hybridized
  3. sp²-hybridized
  4. sp³d-hybridized

Question’s Answer: sp²-hybridized


Which of the mentioned hydroxide is amphoteric?

  1. Al(OH)3
  2. B(OH)3
  3. Ga(OH)3
  4. In(OH)3

Question’s Answer: Al(OH)3


Which is the chief ore of aluminum?

  1. Cryolite
  2. Kaolin
  3. Bauxite
  4. Carnalite

Question’s Answer: Bauxite


What is the chemical formula of bauxite?

  1. Al2O3
  2. Al2Cl6
  3. Na3AlF6
  4. Al2O3.2H2O

Question’s Answer: Al2O3.2H2O


Boric acid is added to glass, because it  _________ .

  1. Makes the glass opalescent
  2. Reduces the coefficient of expansion
  3. Makes the glass brittle
  4. Increase refractive index of the glass

Question’s Answer: Reduces the coefficient of expansion


The true Lawis acid strength order is

  1. BBr3 > BCL3 <BF3
  2. BCl3 > BBr3 > BF3
  3. BBr3 > BCl3 > BF3
  4. BBr3 < BCI3 >BF3

Question’s Answer: BBr3 > BCl3 > BF3


In B₂H6 molecule

  1. There exists a direct B-B o-bond
  2. All the atoms are in one plane
  3. All the B-H bonds are normal covalent bonds
  4. There exist two (three-centre two electron) bonds between the boron atoms.

Question’s Answer: There exist two (three-centre two electron) bonds between the boron atoms


The nature of borax solution is

  1. Acidic
  2. Alkaline
  3. Neutral
  4. Amphoteric

Question’s Answer: Alkaline


Which is the most abundant metal in earth’s crust?

  1. Fe
  2. Al
  3. Ti
  4. Ca

Question’s Answer: Al

Which is the element with maximum first ionization energy (or ionization potential)?

  1. B
  2. N
  3. O
  4. C

Question’s Answer: N


Which metal burns in air at high temperature with the evolution of much heat?

  1. Cu
  2. Hg
  3. Pb
  4. Al

Question’s Answer: Al


Aluminum halide is

  1. White crystalline solid
  2. Hygroscopic
  3. Sublimes at 180°C
  4. All A, B, and C

Question’s Answer: All A, B, and C


Which librates H₂ with NaOH?

  1. Zn
  2. Al
  3. B
  4. All

Question’s Answer: All


Group IIIA of the periodic table consist of how many elements?

  1. 3
  2. 5
  3. 3
  4. 7

Question’s Answer: 5


Which of the mentioned is mineral of Al?

  1. Bauxite
  2. Feldspar
  3. Mica
  4. All A, B, and C

Question’s Answer: All A, B, and C

More Inorganic Chemistry MCQs

  1. Chemical Bonding MCQs
  2. Acids and Bases in inorganic chemistry MCQs
  3. Boron And Aluminum MCQs
  4. Carbon and Silicon MCQs
  5. Hydrogen, Alkali, and Alkaline Earth Metals MCQs
  6. D-Block Elements MCQs [Chemistry]
  7. F-Block Elements MCQs
  8. Halogens MCQs
  9. Inert Gases MCQs
  10. Nitrogen and Phosphorus MCQs
  11. Oxygen and Sulphur MCQs
  12. Experimental Inorganic Chemistry MCQs
  13. Periodic Classification Of Elements And Periodicity Of Properties MCQs
  14. CHEMISTRY MCQs From all subjects of  Chemistry
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