Group Iii A And Iva Elements MCQs

Option A: Beryllium

Option B: Carbon

Option C: Silicon

Option D: Aluminium

Correct Answer: Aluminium ✔

Option A: As antiseptic in medicine

Option B: For washing eyes

Option C: In soda bottles

Option D: For enamel and glazes

Correct Answer: In soda bottles ✔

Option A: it combines with H2O to form carbonic acid

Option B: it reacts with red blood cells of haemoglobin

Option C: it is powerful oxidizing agent

Option D: it is used to prepare aerated drinks

Correct Answer: it reacts with red blood cells of haemoglobin ✔

Option A: carbon is non-metal while silicon is semi-metal

Option B: CO2 is an independent molecule while SiO2 has network covalent structure

Option C: CO2 forms multiple bond while silicon does not form multiple bonds

Option D: Silicon has all sigma bonds

Correct Answer: CO2 is an independent molecule while SiO2 has network covalent structure ✔

Option A: Lubricants

Option B: Hydraulic brakes

Option C: Antifreeze

Option D: Water repellent

Correct Answer: Antifreeze ✔

Option A: Na2B4O7.4H2O

Option B: Na2B4O7.5H2O

Option C: Na2B4O7.2H2O

Option D: Na2B4O7.10H2O

Correct Answer: Na2B4O7.5H2O ✔

Option A: Hall process

Option B: Thermite process

Option C: Haber process

Option D: Contact process

Correct Answer: Hall process ✔

Option A: Si

Option B: Ge

Option C: Se

Option D: Sn

Correct Answer: Sn ✔

Option A: A1

Option B: Si

Option C: B

Option D: C

Correct Answer: B ✔

Option A: boron

Option B: carbon

Option C: silicon

Option D: tin

Correct Answer: tin ✔

Option A: iron

Option B: copper

Option C: aluminium

Option D: zinc

Correct Answer: aluminium ✔

Option A: Cu

Option B: Cr

Option C: Ni

Option D: A1

Correct Answer: A1 ✔

Option A: Tincal

Option B: Boric acid

Option C: Calcium carbonate

Option D: Colemanite

Correct Answer: Tincal ✔

Option A: Soil porocity

Option B: Proper growth of plants

Option C: Alkalinity of soil

Option D: All

Correct Answer: Proper growth of plants ✔

Option A: H2SnO3

Option B: H2SiO3

Option C: H3AsO4

Option D: H3SbO4

Correct Answer: H2SiO3 ✔

Option A: Pb2O

Option B: Pb3O4

Option C: PbO2

Option D: All of the above

Correct Answer: Pb3O4 ✔

Option A: decrease

Option B: increase

Option C: remains constant

Option D: first decreases then increases

Correct Answer: increase ✔

Option A: metal borate

Option B: metal meta borate

Option C: metal boride

Option D: metal silicate

Correct Answer: metal meta borate ✔

Option A: it has small size

Option B: it has high nuclear charge

Option C: it forms molecular addition compounds

Option D: all of the above

Correct Answer: all of the above ✔

Option A: Ch3

Option B: OH

Option C: OCH3

Option D: O2

Correct Answer: Ch3 ✔

Option A: As nitrometer

Option B: To remove air bubbles from molten metal

Option C: To produce alloy

Option D: As insulator

Correct Answer: To remove air bubbles from molten metal ✔

Option A: 26%

Option B: 27%

Option C: 37%

Option D: <2.6%

Correct Answer: 37% ✔

Option A: 4

Option B: 2

Option C: 1

Option D: 6

Correct Answer: 4 ✔

Option A: 1s2 2s2 2p3

Option B: 1s2 2s2 2p6 3s2 3p1

Option C: 1s2 2s2 2p4

Option D: 1s2 2s2 2p6 3s2 3p6 4s2 3d1

Correct Answer: 1s2 2s2 2p6 3s2 3p1 ✔

Option A: Acidic oxide

Option B: Basic oxide

Option C: Amphoteric oxide

Option D: It does not exists

Correct Answer: Amphoteric oxide ✔

Option A: Heat resistant

Option B: Low melting

Option C: Used to prepare chemical garden

Option D: Green in colour

Correct Answer: Heat resistant ✔

Option A: More soluble in cold water

Option B: More soluble in hot water

Option C: Insoluble in water

Option D: Soluble only in organic solvents

Correct Answer: More soluble in hot water ✔

Option A: Molecular addition compounds

Option B: Molecular crystals

Option C: Semiconductors

Option D: Ionic compounds

Correct Answer: Molecular addition compounds ✔

Option A: Small size

Option B: High nuclear charge

Option C: Both A and B

Option D: No authorized justification yet

Correct Answer: Both A and B ✔