Rusting of iron takes place due to (1) oxidation (2) carbonation (3) exfoliation (4) corrosion

Rusting of iron takes place due to (1) oxidation (2) carbonation (3) exfoliation (4) corrosion 
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Rusting of iron takes place due to – (1) oxidation (2) carbonation (3) exfoliation (4) corrosion

Description : Rusting of iron takes place due to – (1) oxidation (2) carbonation (3) exfoliation (4) corrosion

Last Answer : (1) oxidation Explanation: The rusting of iron is an electrochemical process that begins with the transfer of electrons from iron to oxygen. The rate of corrosion is affected by water and accelerated by ... iron is in contact with water, oxygen, or other strong oxidants, or acids, it rusts.

The reduction of the PH value, by the action of atmospheric carbon dioxide with the alkali of the cement paste is called [ A ] atmospheric corrosion [ B ] chloride corrosion [ C ] oxidation [ D ] carbonation

Description : The reduction of the PH value, by the action of atmospheric carbon dioxide with the alkali of the cement paste is called [ A ] atmospheric corrosion [ B ] chloride corrosion [ C ] oxidation [ D ] carbonation

Last Answer : [ D ] carbonation

The reduction of the PH value, by the action of atmospheric carbon dioxide with the alkali of the cement paste is called [ A ] atmospheric corrosion [ B ] chloride corrosion [ C ] oxidation [ D ] carbonation

Description : The reduction of the PH value, by the action of atmospheric carbon dioxide with the alkali of the cement paste is called [ A ] atmospheric corrosion [ B ] chloride corrosion [ C ] oxidation [ D ] carbonation

Last Answer : [ D ] carbonation

Wrought iron is resistant to rusting and corrosion due to the presence of

Description : Wrought iron is resistant to rusting and corrosion due to the presence of

Last Answer : Wrought iron is resistant to rusting and corrosion due to the presence of A. Cementite `(Fe_(3)C)` B. ... 4)` Slages D. `MnSiO_(3)& FePO_(4)`slages

Iron is prevented from rusting by coating with zinc. This process is called as – (1) Galvanisation (2) Corrosion (3) Sublimation (4) Reduction

Description : Iron is prevented from rusting by coating with zinc. This process is called as – (1) Galvanisation (2) Corrosion (3) Sublimation (4) Reduction

Last Answer : (1) Galvanisation Explanation: Galvanization is the process of applying a protective zinc coating to steel or iron, in order to prevent rusting. The term is derived from the name of Italian scientist Luigi ... is hot-dip galvanization, in which steel parts are sub-merged in a bath of molten zinc.

Iron is prevented from rusting by coating with zinc. This process is called as (1) Galvanisation (2) Corrosion (3) Sublimation (4) Reduction

Description : Iron is prevented from rusting by coating with zinc. This process is called as (1) Galvanisation (2) Corrosion (3) Sublimation (4) Reduction

Last Answer : Galvanisation

Chemical weathering of soil is caused due to (A) Oxidation (B) Carbonation (C) Hydration (D) All the above

Description : Chemical weathering of soil is caused due to (A) Oxidation (B) Carbonation (C) Hydration (D) All the above

Last Answer : Answer: Option D

Wrought iron is not (A) Ductile & resistant to corrosion/rusting (B) Weldable easily (C) Having uniform strength in all directions (D) Having maximum tensile strength along the lines of slag distribution

Description : Wrought iron is not (A) Ductile & resistant to corrosion/rusting (B) Weldable easily (C) Having uniform strength in all directions (D) Having maximum tensile strength along the lines of slag distribution

Last Answer : Option C

When water itself combines chemically with some element or mineral it is called – (1) Carbonation (2) Desilication (3) Hydration (4) Oxidation

Description : When water itself combines chemically with some element or mineral it is called – (1) Carbonation (2) Desilication (3) Hydration (4) Oxidation

Last Answer : (3) Hydration Explanation: When water combines chemically with other elements, the process is called hydration. In organic chemistry, a hydration reaction is a chemical reaction in which a hydroxyl ... runs in a strong acidic, aqueous solution. Hydration leaves the non-water component intact.

When water itself combines chemically with some element or mineral it is called (1) Carbonation (2) Desilication (3) Hydration (4) Oxidation

Description : When water itself combines chemically with some element or mineral it is called (1) Carbonation (2) Desilication (3) Hydration (4) Oxidation

Last Answer : Hydration

Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygen d. Chemical reaction with CO2 (1) a and b (2) b and c (3) c and d (4) a and c

Description : Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygen d. Chemical reaction with CO2 (1) a and b (2) b and c (3) c and d (4) a and c

Last Answer : a and c

Rusting of Iron involves--------? A. Reduction B. Oxidation (Answer) C. Decomposition D. Displacement

Description : Rusting of Iron involves--------? A. Reduction B. Oxidation (Answer) C. Decomposition D. Displacement

Last Answer : B. Oxidation (Answer)

Pick up the correct statement from the following: (A) Rusting is caused due to combined action of air, moisture and carbon dioxide (B) During rusting, first ferrous bicarbonates are formed (C) On further oxidation ferrous bicarbonates get converted to ferric bicarbonates (D) All the above

Description : Pick up the correct statement from the following: (A) Rusting is caused due to combined action of air, moisture and carbon dioxide (B) During rusting, first ferrous bicarbonates are formed (C) On further oxidation ferrous bicarbonates get converted to ferric bicarbonates (D) All the above

Last Answer : Answer: Option D

Peel of rock due to temperature variation is called as — a. Flocculation b. Exfoliation c. Foliation d. Decomposition

Description : Peel of rock due to temperature variation is called as — a. Flocculation b. Exfoliation c. Foliation d. Decomposition

Last Answer : b. Exfoliation

Widening of a river valley takes place due to – (1) Corrosion (2) Lateral erosion (3) Corrasion (4) Hydraulic action

Description : Widening of a river valley takes place due to – (1) Corrosion (2) Lateral erosion (3) Corrasion (4) Hydraulic action

Last Answer : (2) Lateral erosion Explanation: Lateral or sideways erosion widens the river valley; while, Vertical or downward erosion deepens the river valley. Due to continued lateral erosion, the river ... slopes are also eroded by weathering and mass wasting and by the development of tributary valleys.

Widening of a river valley takes place due to (1) Corrosion (2) Lateral erosion (3) Corrasion (4) Hydraulic action

Description : Widening of a river valley takes place due to (1) Corrosion (2) Lateral erosion (3) Corrasion (4) Hydraulic action

Last Answer : Lateral erosion

Due to rusting the weight of iron - (1) Decreases (2) Increases (3) Remains the same (4) Uncertain

Description : Due to rusting the weight of iron - (1) Decreases (2) Increases (3) Remains the same (4) Uncertain

Last Answer : (2) Increases Explanation: Corrosion of a block of metal - Iron to Iron Oxide (rust), Aluminum to Bauxite, Cooper to Cupric-oxide, or otherwise - does not change the weight of the metal in the system.

Rusting is the process of – (1) Oxidation (2) Reduction (3) Decomposition (4) Displacement

Description : Rusting is the process of – (1) Oxidation (2) Reduction (3) Decomposition (4) Displacement

Last Answer : (1) Oxidation Explanation: Rust is the process of iron (molecules) oxidizing into iron oxide, or rust. General formula of rust is Fe2O3.nH2O

Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its (A) High strength to weight ratio (B) Low temperature strength properties (C) Its ability to be cast, rolled, forged & stamped (D) High strength and corrosion & oxidation-resistance at elevated temperature

Description : Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its (A) High strength to weight ratio (B) Low temperature strength properties (C) Its ability ... rolled, forged & stamped (D) High strength and corrosion & oxidation-resistance at elevated temperature

Last Answer : (A) High strength to weight ratio

What is meant by ‘rusting’? With labelled diagrams, describe an activity to find out the conditions under which iron rusts. -Chemistry

Description : What is meant by ‘rusting’? With labelled diagrams, describe an activity to find out the conditions under which iron rusts. -Chemistry

Last Answer : When iron is exposed to air and moisture for a very long time, it gets covered with a brown flaky substance. This brown flaky substance is called rust and the process is called rusting. The ... when only oxygen was available, it shows that rusting cannot take place if only oxygen is available.

The rusting of iron is a/an - (1) physical change (2) electrochemical change (3) electrical change (4) None of the above

Description : The rusting of iron is a/an - (1) physical change (2) electrochemical change (3) electrical change (4) None of the above

Last Answer : (2) electrochemical change Explanation: When iron is exposed to air and moisture, its surface gradually corroded and converted into a brown mass. The rusting of iron is due to the formation of hydrated ion. Rusting is an electro-chemical process.

The metal, used to galvanise iron to protect it from rusting is - (1) Zine (2) Chromium (3) Lead (4) Antimony

Description : The metal, used to galvanise iron to protect it from rusting is - (1) Zine (2) Chromium (3) Lead (4) Antimony

Last Answer : (1) Zine Explanation: Galvanization is the process of applying a protective zinc coating to steel or iron, in order to prevent rusting. Although galvanization can be done with electrochemical and electro- ... is hot-dip galvanization, in which steel parts are submerged in a bath of molten zinc.

Rusting of iron is quicker in saline water than in ordinary water. Why is it so ?

Description : Rusting of iron is quicker in saline water than in ordinary water. Why is it so ?

Last Answer : Ans. In saline water, NaCl helps water to dissociate into H+ and OH– . Greater the number of H+ , quicker will be rusting of Iron.

The rusting of iron is a/an (1) physical change (2) electrochemical change (3) electrical change (4) None of the above

Description : The rusting of iron is a/an (1) physical change (2) electrochemical change (3) electrical change (4) None of the above

Last Answer : electrochemical change

The metal, used to galvanise iron to protect it from rusting is (1) Zinc (2) Chromium (3) Lead (4) Antimony

Description : The metal, used to galvanise iron to protect it from rusting is (1) Zinc (2) Chromium (3) Lead (4) Antimony

Last Answer : Zinc

Which metal does not undergo corrosion due to the formation of oxide layer? (1) Copper (2) Iron (3) Aluminium (4) Zinc

Description : Which metal does not undergo corrosion due to the formation of oxide layer? (1) Copper (2) Iron (3) Aluminium (4) Zinc

Last Answer : Aluminium

Is it true that exfoliation is the effect that ground water has on limestone?

Description : Is it true that exfoliation is the effect that ground water has on limestone?

Last Answer : yes

A healthy 6 years-old child presents with carious maxillary second primary molar with a necrotic pulp. Which treatment would be preferred? A. Extraction B. Indirect pulp treatment C. Pulpotomy (it's done to preserve the vitality of the roots and allow normal exfoliation) D. Pulpectomy to preserve the tooth as a space manteiner. E. Antibiotic coverage

Description : A healthy 6 years-old child presents with carious maxillary second primary molar with a necrotic pulp. Which treatment would be preferred? A. Extraction B. Indirect pulp treatment C. ... normal exfoliation) D. Pulpectomy to preserve the tooth as a space manteiner. E. Antibiotic coverage

Last Answer : D. Pulpectomy to preserve the tooth as a space manteiner.

Explain the mechanism of oxidation corrosion

Description : Explain the mechanism of oxidation corrosion

Last Answer : The electrons are transferred from metal atom to oxygen. Metal loses electron while oxygen accepts electron forms their respective ions these two types of ion combine together to from metal oxide. 

Does carbonation make sparkling water acidic?

Description : Does carbonation make sparkling water acidic?

Last Answer : Yes. The CO2 reacts with water to form carbonic acid. It is weakly acidic. Don’t know how much. Best thing would be to get some litmus paper and experiment.

Is a carbonated drink absorbed slower by the body because of the carbonation true or false?

Description : Is a carbonated drink absorbed slower by the body because of the carbonation true or false?

Last Answer : 1

One of the steps during refining of cane sugar consists of addition ofhydrated lime to the sugar syrup followed by carbonation of the resultingsolution. The purpose of this step is to(A) Adjust the pH of the syrup(B) Remove the coloring matter from the syrup(C) Reduce the viscosity of the syrup(D) Improve the rate of crystallisation of sugar

Description : One of the steps during refining of cane sugar consists of addition ofhydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to (A) Adjust ... (C) Reduce the viscosity of the syrup (D) Improve the rate of crystallisation of sugar

Last Answer : (A) Adjust the pH of the syrup

Explain why rusting of iron objects is faster in coastal areas than in deserts. -Science-7

Description : Explain why rusting of iron objects is faster in coastal areas than in deserts. -Science-7

Last Answer : As content of moisture in the air in coastal areas is higher than in the air in deserts. So, the process of rusting is faster in coastal areas.

Explain how painting of an iron gate prevents it from rusting? -Science-7

Description : Explain how painting of an iron gate prevents it from rusting? -Science-7

Last Answer : The presence of oxygen and moisture is essential for rusting to occur. Painting prevents the iron gate from coming in contact with oxygen and moisture, hence prevents rusting.

Two methods by which rusting of iron can be prevented are __________ and __________ -Science-7

Description : Two methods by which rusting of iron can be prevented are __________ and __________ -Science-7

Last Answer : painting or greasing, galvanisation

What does the rusting of iron nail? -Do You Know?

Description : What does the rusting of iron nail? -Do You Know?

Last Answer : answer:

How rusting of iron is quicker in saline water?

Description : How rusting of iron is quicker in saline water?

Last Answer : Need answer

Alloy steel containing chromium to resist rusting is known as (a) wrought iron (b) cast iron (c) hard steel (d) stainless steel

Description : Alloy steel containing chromium to resist rusting is known as (a) wrought iron (b) cast iron (c) hard steel (d) stainless steel

Last Answer : Ans:(d)

All the following are examples of chemical change, except (a) Magnetising of iron nails (b) Rusting of iron rods (c) Digestion of food (d) Souring of milk

Description : All the following are examples of chemical change, except (a) Magnetising of iron nails (b) Rusting of iron rods (c) Digestion of food (d) Souring of milk

Last Answer : Ans:(a)

Alloy steel containing chromium, to resist rusting, is known as (a) Wrought iron (b) Cast iron (c) Hard steel (d) Stainless steel

Description : Alloy steel containing chromium, to resist rusting, is known as (a) Wrought iron (b) Cast iron (c) Hard steel (d) Stainless steel

Last Answer : Ans:(d)

The method of protecting iron from rusting, by coating a thin layer of Zinc is called - (1) Galvanizing (2) rancidity (3) Alloy (4) Pulverizing

Description : The method of protecting iron from rusting, by coating a thin layer of Zinc is called - (1) Galvanizing (2) rancidity (3) Alloy (4) Pulverizing

Last Answer : (1) Galvanizing Explanation: Galvanisation or galvanization (or galvanizing as it is most commonly called) is the process of applying a protective zinc coating to iron or steel, to prevent rusting.

Which of the following is not favourable to prevent iron from rusting?

Description : Which of the following is not favourable to prevent iron from rusting?

Last Answer : Annealing

The rusting of iron

Description : The rusting of iron

Last Answer : Increases its weight

Which of the following is required for the rusting of iron?

Description : Which of the following is required for the rusting of iron?

Last Answer : oxygen and water

The rusting of iron metal in air needs both–

Description : The rusting of iron metal in air needs both–

Last Answer : Oxygen and Moisture

Rusting of Iron is –

Description : Rusting of Iron is –

Last Answer : Due to oxidation

Rusting of iron is an example of which thing?

Description : Rusting of iron is an example of which thing?

Last Answer : Slow oxidation

What does the rusting of iron nail?

Description : What does the rusting of iron nail?

Last Answer : Increases its weight

Galvanised iron is (A) Harder (B) Protected from rusting (C) Alumina coated iron (D) None of these

Description : Galvanised iron is (A) Harder (B) Protected from rusting (C) Alumina coated iron (D) None of these

Last Answer : (B) Protected from rusting

Pick out the correct statement. (A) Stainless steel is nothing but chromium coated steel (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal (C) Plastic deformation of a material is its temporary distortion under the action of applied stress (D) Rusting of iron is not electrochemical in nature

Description : Pick out the correct statement. (A) Stainless steel is nothing but chromium coated steel (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal (C) ... its temporary distortion under the action of applied stress (D) Rusting of iron is not electrochemical in nature

Last Answer : (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal