Description : How rusting of iron is quicker in saline water?
Last Answer : Need answer
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.
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.
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.
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.
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.
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
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
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
Description : The metal, used to galvanise iron to protect it from rusting is (1) Zinc (2) Chromium (3) Lead (4) Antimony
Last Answer : Zinc
Description : Rusting of iron takes place due to (1) oxidation (2) carbonation (3) exfoliation (4) corrosion
Last Answer : oxidation
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.
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.
Description : Two methods by which rusting of iron can be prevented are __________ and __________ -Science-7
Last Answer : painting or greasing, galvanisation
Description : What does the rusting of iron nail? -Do You Know?
Last Answer : answer:
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
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)
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)
Description : Alloy steel containing chromium, to resist rusting, is known as (a) Wrought iron (b) Cast iron (c) Hard steel (d) Stainless steel
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.
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.
Description : Which of the following is not favourable to prevent iron from rusting?
Last Answer : Annealing
Description : The rusting of iron
Last Answer : Increases its weight
Description : Which of the following is required for the rusting of iron?
Last Answer : oxygen and water
Description : The rusting of iron metal in air needs both–
Last Answer : Oxygen and Moisture
Description : Rusting of Iron is –
Last Answer : Due to oxidation
Description : Rusting of iron is an example of which thing?
Last Answer : Slow oxidation
Description : What does the rusting of iron nail?
Description : Galvanised iron is (A) Harder (B) Protected from rusting (C) Alumina coated iron (D) None of these
Last Answer : (B) Protected from rusting
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
Description : What are the methods of preventing rusting of iron?
Last Answer : Iron articles can be coated with zinc or chromium. By painting the iron articles. By heating and dipping in molten coal tar.
Description : Rusting of Iron involves--------? A. Reduction B. Oxidation (Answer) C. Decomposition D. Displacement
Last Answer : B. Oxidation (Answer)
Description : Rusting of iron and respiration: (a) both are exothermic processes (b) both are endothermic processed (c) rusting is exothermic, respiration is endothermic (d) rusting is endothermic, respiration is exothermic
Last Answer : (a) both are exothermic processes
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
Description : The rusting of iron metal in air needs both
Description : Assertion A : Paints with white lead base are not recommended for painting of iron works. Reason R : Paints with white lead base do not check rusting of iron. Select your answer according to the coding system given below: ... of A (C) A is true but R is false (D) A is false but R is true
Last Answer : Answer: Option A
Description : The problem of iron toxicity generally exists in— (A) Acid soils (B) Alkali soils (C) Saline soils(D) Saline-Alkali soils
Last Answer : (A) Acid soils
Description : Identify the type of soil on the basis of the given characteristics - 1. They are rich in lime, iron, magnesia and alumina. 2. They are generally clayey, deep and impermeable. 3. They are mainly found ... the given alternatives - a. Laterite soil b. Red and yellow soil c. Saline soil d. Black soil
Last Answer : d. Black soil
Description : Gypsum is used for improvement of: (1) Alkaline soils (2) Saline soils (3) (3) Podsols (4) (4) Acidic soils
Last Answer : (2) Saline soils Explanatioqn: Gypsum is calcium sulfate which is essential to the sustainability of most irrigated soils. Irrigated land eventually leads to sodieity and salinity unless extreme care is ... improves sodic (saline) soils by removing sodium from the soil and replacing it with calcium.
Description : Gypsum is used for improvement of: (1) Alkaline soils (2) Saline soils (3) Podsols (4) Acidic soils
Last Answer : Saline soils
Description : In your opinion do you think people anger quicker today than say 20 years ago?
Last Answer : They sure seem more entitled and less cooperative than in the past.
Description : Do cuts and burns tend to heal quicker on certain parts of the body than elsewhere?
Last Answer : Yes. The inside of your mouth is one of the fastest healing areas of your body. Not sure about shoulder vs. face.
Description : Do you think boys fall in love quicker than girls?
Last Answer : I think that it depends on the person, not gender.
Description : Are people who display physical resiliance still quicker than average to recover from injury when they are older?
Last Answer : He got lucky is all.
Description : Why do gases diffuse quicker than other gases?
Last Answer : because of the chemicals inside it.Edit: This answer is incorrect. Smaller, lighter weight gasesdiffuse faster than larger, heavier gases.
Description : Why do clothes dry quicker on a windy day than a still day?
Last Answer : The breeze blows away microscopic water droplets from the clothes.
Description : With regard to dark adaptation: a. is a quicker process than light adaptation b. the sensitivity of the cones increases more rapidly than the rods c. it is monophasic in rod monochromatism d. the first limb of the curve represents rod recovery
Last Answer : it is monophasic in rod monochromatism
Description : True statements about visual adaptation include: a. light adaptation takes longer than dark adaptation b. dark adaptation reaches its maximum in about 20 minutes c. in dark adapted eye, a higher intensity ... wear red goggles in the light adapt quicker in the dark than those who do not wear them
Last Answer : in dark adapted eye, a higher intensity of light is required to stimulate cones than rods