 Show Get the answer to your homework problem. Try Numerade free for 7 days We don’t have your requested question, but here is a suggested video that might help. Related QuestionDefine physical change and chemical change. State which type of change occurs in each of the following statements: (a) Passing an electric current through molten magnesium chloride yields molten magnesium and gaseous chlorine. (b) The iron in discarded automobiles slowly forms reddish brown, crumbly rust.
DiscussionYou must be signed in to discuss. Video TranscriptSo this problem asks us to determine whether or not to situations are physical or chemical changes. Ah, the first is running a current of electricity through a sample of magnesium chloride, which yields more nine. Easy, um, and gashes Quiet. Since you start with my museum chloride, which is obviously a compound and you end with only magnesium and Onley chloride, that means that the composition of the material has changed. So this is a chemical change. All right, so the 2nd 1 is Ah, rust on the bottom of a car building up so that again you're changing from iron, typically iron to iron oxide. So once again, you're changing the chemical composition, So this is also a chemical change. Free 100 Questions 100 Marks 120 Mins Latest UP Lekhpal Updates Last updated on Sep 22, 2022 The Uttar Pradesh Subordinate Services Selection Commission, on 7th September 2022 had released the final answer key of the UP Lekhpal mains exam for advt no 01/2022. The UP Lekhpal Exam was conducted on 31st July 2022. The candidates can calculate their scores using the final answer key and the marking scheme of the exam. It is expected that the board will soon release the merit list. This cycle is ongoing for 8085 vacancies where candidates between the age of 21 to 40 years were eligible to apply. Know the UP Lekhpal Answer key details here.
Answer (Detailed Solution Below)Option 4 : Dissolution of sugar into water Free Electric charges and coulomb's law (Basic) 10 Questions 10 Marks 10 Mins The correct answer is Option 4, i.e Dissolution of sugar into water. Concept - A physical change is a change in which no new substance is formed. Physical changes affect the form of a chemical substance, but not its chemical composition. Explanation -
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The correct answer is Melting of ice. Among all the given options, Melting of ice involves a physical change. A physical change involves the changes of state from a solid to a liquid or a gas and vice versa. Boiling water, Ice melting into water is an example of this conversion.
What is an example of a physical change apex?The correct answer is Making ice cream. Making ice cream is an example of physical change.
Which of the following are following are physical changes?Solution : Option (i) Melting of iron meta, (iii) Bending of an iron rod and (iv) Drawing a wire of iron metal are physical changes, because in three processes, iron changes its form, not the chemical composition.
Which of the following is only physical change?Electrolysis of water. Solution : Dissolution of any acid in water makes acid dilute. Hence it involves only a physical change.
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Which of the following is a physical change apex
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