Chemistry, 10.05.2021 14:00 jessysmith9678
Assertion- Reasoning type questions
9. Assertion : When ferrous sulphate crystals are heated strongly, its colour
changes from green to brown.
Reason : It undergoes displacement reaction.
10. Assertion : Respiration is an endothermic reaction.
Reason: Endothermic process absorbs energy.
11. Assertion: Brown fumes are produced when lead nitrate is heated.
Reason: Oxygen gas is produced due to the decomposition of lead nitrate.
12. Assertion: Calcium carbonate when heated gives calcium oxide and water.
Reason: On heating calcium carbonate, decomposition reaction takes
place.
13. Assertion: In a reaction of magnesium with oxygen, magnesium serves as a
reducing agent
Reason: The substance which gains oxygen in a chemical reaction is a
reducing agent.
Assertion: Rusting of iron is a chemical change.
Reason: The chemical properties of hydrated Fe2O3 are different from
iron and oxygen
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Answers: 3
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Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole
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Chemistry, 22.06.2019 11:40
Consider this equilibrium: n29) + o2(g) + 2no(c).nitrogen gas and oxygen gas react when placed in a closed container. as the reaction proceeds towards equilibrium, what happens to the rate of thereverse reaction?
Answers: 1
Chemistry, 22.06.2019 19:40
Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory
Answers: 3
Chemistry, 22.06.2019 22:40
Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent
Answers: 1
Assertion- Reasoning type questions
9. Assertion : When ferrous sulphate crystals are heated stron...
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