Free Reactions of Group IV Elements MCQs with Answers

• A. CaO2
• B. CO2
• C. SnO2
• D. SiO2

Explanation: SnO2 is an amphoteric oxide because it can act as both an acid and a base and react with both acidic and basic solutions to form salts.

• A. Zinc oxide and alumina
• B. Alumina and silica
• C. Silica and Chromium oxide
• D. Zinc oxide and Chromium oxide

Explanation: The industrial preparation of methanol usually involves a catalyst composed of zinc oxide and chromium oxide.

• A. N2
• B. NO2
• C. H2
• D. O2

Explanation: Nitric oxide, NO, reacts with oxygen gas to form nitrogen dioxide, a dark brown gas

• A. Carbon.
• B. Nitrogen.
• C. Silicon.
• D. All of these.

Explanation: a) Carbon: This is the correct option. Carbon is the element that forms long chains alternating with oxygen.

• A. 0.7-1.5
• B. 0.1-0.2
• C. 0.2-0.7
• D. 1.6-2.00

Explanation: Plain carbon steel is an alloy of iron and carbon. It has good machinability and malleability.

• A. Nitric oxide
• B. Meta stannic acid.
• C. Ammonium nitrite
• D. None of these.

Explanation: Nitric acid is a very strong acid and is also known as aqua fortis. When metallic tin reacts with concentrated nitric acid it forms…

• A. Pb2O
• B. PbO2
• C. PbO
• D. 2PbCO3.Pb(OH)2

Explanation: a) Pb2O (Lead(II) Oxide): Lead(II) oxide is commonly known as lead oxide or litharge.

• A. Gibbsite
• B. Emerald
• C. Bauxite
• D. Cryolite

Explanation: a) Gibbsite: Gibbsite is a mineral composed of aluminum hydroxide (Al(OH)3). It is not the same as Al2F2SiO4.

• A. Pb2O3
• B. Pb2O
• C. PbO
• D. Pb3O4

Explanation: Explanation:The chemical formula of lead suboxide is Pb2O. This option is not correct.

• A. Hydration
• B. Hydrolysis
• C. Oxidation
• D. Reduction

Explanation: Explanation:Phosphine can be produced by reduction of phosphorous acid (H3PO3) with a reducing agent such as sodium hypophosphite…

• A. CO2
• B. CO
• C. CaO
• D. C

Explanation: A is correct as urea is produced by the reaction of CO2 B is incorrect (fact)C is incorrect (fact)D is incorrect (fact)

• A. 90
• B. 80
• C. 98
• D. 89

Explanation: In contact process, SO3 is formed in 98% of H2SO2

• A. Diamond
• B. Graphite
• C. Coal
• D. Charcoal

Explanation: Diamond: Diamond is the inert form of carbon. It is a crystalline structure where each carbon atom is bonded to four neighboring carbon…

• A. Hg
• B. Pb
• C. Fe
• D. Sn

Explanation: Pb (Lead): If pellets containing lead (Pb) remain in the body, they can cause lead poisoning, which can result in neurological…

• A. CH4
• B. C2H6
• C. C3H4
• D. C4H20

Explanation: The hydrolysis of Al4C3 (aluminum carbide) produces methane gas. The chemical equation for the hydrolysis reaction of Al4C3 can be…

• A. Soda glass
• B. Water glass
• C. Jinna glass
• D. Pyrex glass

Explanation: Sodium silicate is commonly known as water glass, or soluble glass. It gets its name because it is essentially glass (silicon dioxide) in…

• A. Slow and exothermic
• B. Fast and exothermic
• C. Slow and endothermic
• D. Fast and endothermic

Explanation: The correct answer is that the conversion of carbonate to urea is slow and endothermic.

• A. Bauxite
• B. Borax
• C. Carborundum
• D. Colemanite

Explanation: The compound Na2B4O7 10 H2O is known as Borax. It is a naturally occurring mineral and a common household cleaning agent.

• A. PbO + 4NaOH →Pb (OH)4 + 2 Na2O
• B. PbO + 2NaOH + H2O →Na2 [Pb(OH)4]
• C. PbO + NaOH + H2O →Na [Pb(OH)3]
• D. PbO + 4NaOH + H2O →Na4 [Pb(OH)6]

Explanation: When PbO hydrolyses in water and NaOH, Na2 [Pb(OH)4 is formed, thus B is correct.

• A. Copper and zinc
• B. Copper and tin
• C. Zinc and tin
• D. Chromium and Tin

Explanation: Bronze is an alloy traditionally composed of copper and tin. Modern bronze is typically 88 percent copper and about 12 percent tin.