Description : When iron rusts, how is its weight?
Last Answer : – Increases
Description : When iron rusts, its weight – (1) decreases (2) increases (3) remains the same (4) first increases and then decreases
Last Answer : (2) increases Explanation: When iron rusts, oxide compounds are formed due the interaction between oxygen in the air or in water and the metal. Because of the oxygen atoms binding with the metal, the weight of the metal with rust will increase.
Description : When iron rusts, its weight : (1) decreases (2) increases (3) remains the same (4) first increases and then decreases
Last Answer : (2) increases Explanation: When iron rusts, oxide compounds are formed due the interaction between oxygen in the air or in water an the metal.
Description : When iron rusts, its weight - (1) decreases (2) increases (3) Constant (4) None
Last Answer : (2) increases Explanation: Iron rust when they come into contact with water and oxygen. They rust faster in salty water or acid rain.
Description : When Iron rusts; its weight?
Last Answer : increases
Last Answer : Increases
Description : When iron rusts, its weight (1) decreases (2) increases (3) remains the same (4) first increases and then decreases
Description : When iron rusts, the weight (a) Increases (b) Decreases (c) Remains the same (d) First increases then decreases
Last Answer : Ans:(a)
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 : Of the following processes in nature, which one involves only a physical change A. A bird digests a worm. B. Photosynthesis occurs in a leaf. C. An earthquake causes a rockslide. D. A chunk of iron ore rusts.?
Last Answer : C: An Earthquake causes a rockslide
Description : Iron rusts at the area (a) Cathodic area (b) Anodic area (c) Both cathodic and anodic areas (d) None of the above
Description : Iron rusts quickly in – (1) Rain water (2) Sea water (3) Distilled water (4) River water
Last Answer : (2) Sea water Explanation: Water is the enabler of fast oxidation of iron. So freshwater will also cause rust. However, salt water (sea water) is a very good conductor (lots of dissociated ions ... which causes the current to be re-versed and in effect the zinc corrodes rapidly, protecting the iron.
Description : Iron rusts quickly in
Last Answer : Sea water
Description : A chemical change takes place when iron (A) Rusts (B) Melts (C) Is heated (D) None of these
Last Answer : (A) Rusts
Description : Give reason: a) Iron exposed to air rusts quickly during rainy season.
Last Answer : a) Iron exposed to air rusts quickly during rainy season. Due to the presence of excess water vapour. b) Iron nail kept in a closed jar containing calcium chloride does not rust. As air is dry ... ) Tin is used to coat the inner walls of brass and copper utensils. To avoid corrosion or rusting.
Description : . Iron rusts quickly in
Description : Iron rusts quickly in (1) Rain water (2) Sea water (3) Distilled water (4) River water
Description : Often held but never touched, always wet but never rusts, often bites but seldom bit, to use me well you must have wit.What am I? -Riddles
Last Answer : Your tongue.
Description : Is the body of a trucks rusts a physical or a chemical property?
Last Answer : Feel Free to Answer
Description : What rusts metal?
Last Answer : Oxygen is a corrosive element that rusts metal.
Description : Is rusts physical change or chemical change?
Last Answer : Its is chemical as
Description : Silencing of mRNA has been used in producing transgenic plants resistant to (a) boll worms (b) nematodes (c) white rusts (d) bacterial blights.
Last Answer : (b) nematodes