ASSERTION AND REASON CLASS10 -CHEMISTRY Class 10 - ASSERTION AND REASON - Chemistry Mock Test. This Test Consist of 20 QuestionsTotal Time - 20 -Minutes 1. Assertion (A): HCl gas does not change the colour of dry blue litmus paper.Reason (R): HCl gas dissolves in the water present in wet litmus paper to form H+ ions Both A and R are true and R is the correct explanation of A. A is false but R is true. A is true but R is false. Both A and R are true and R is not the correct explanation of A. None 2. Assertion (A): MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O is redox reaction. Reason (R): MnO2 oxidises HCl to Cl2 and gets reduced to MnCl2. If Assertion is correct but Reason is incorrect. If both Assertion and Reason are correct, but reason is not the correct explanation of Assertion. If Assertion is incorrect but Reason is correct. If both Assertion and Reason are correct and reason is the correct explanation of Assertion. None 3. Assertion(A) : Diamond and graphite are allotropes of carbon. Reason (R) : Some elements can have several different structural forms while in the same physical state. These forms are called allotropes. Both A and R are true and R is the correct explanation of A. Both A and R are true but R is not the correct explanation of A. A is true but R is false. A is false but R is true. None 4. Assertion: Ethanoic acid reacts with ethyl alcohol in presence of conc H2SO4 to form ethyl ethanoate.Reason: Esters are used in ice creams and cold drinks. The statement of the Assertion is false but the Reason is true. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. Assertion is true but the Reason is false. None 5. Assertion (A): In alkanes, alkenes and alkynes the valency of carbon is always four. Reason (R): All hydrocarbons except alkanes contain double bonds. Both A and R are true and R is the correct explanation of A. A is false but R is true. Both A and R are true but R is not the correct explanation of A. A is true but R is false. None 6. Assertion (A): On heating, colour of hydrated copper sulphate changes from blue to white.Reason (R) :On strong heating , Copper sulphate crystals lose all the water of crystallisation and form anhydrous salt. A is true but R is false. Both A and R are true and R is the correct explanation of A. A is false but R is true. Both A and R are true and R is not the correct explanation of A. None 7. Assertion(A): The aqueous solution of glucose and alcohol do not show acidic character.Reason(R ): Aqueous solution of glucose and alcohol do not give H+ ions . A is true but R is false. Both A and R are true and R is not the correct explanation of A. Both A and R are true and R is the correct explanation of A. A is false but R is true. None 8. Assertion (A): When HCl is added to zinc granules, a chemical reaction occurs. Reason (R): Evolution of a gas indicates that the chemical reaction is taking place. If Assertion is incorrect but Reason is correct. If both Assertion and Reason are correct and reason is the correct explanation of Assertion. If both Assertion and Reason are correct, but reason is not the correct explanation of Assertion. If Assertion is correct but Reason is incorrect None 9. Assertion: Nitrogen is a non-metal. Reason: Nitrogen has 5 valence electrons. Assertion is true but the Reason is false. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. statement of the Assertion is false but the Reason is true. None 10. Assertion: Silver becomes black in colour when exposed to atmosphere. Reason: Silver reacts with H2S gas to form Ag2S which is black in colour. statement of the Assertion is false but the Reason is true. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. Assertion is true but the Reason is false. None 11. Assertion (A) : The acid must be added to water with constant stirring.Reason(R) : Mixing of an acid with water decreases the concentration of H+ ions per unit volume. A is false but R is true. Both A and R are true and R is the correct explanation of A. Both A and R are true and R is not the correct explanation of A. A is true but R is false. None 12. Assertion (A): The functional group present in alcohols is – OH. Reason (R): It is the same group as present in water, hence water and alcohol have similar properties. A is false but R is true. Both A and R are true and R is the correct explanation of A. Both A and R are true but R is not the correct explanation of A. A is true but R is false. None 13. Assertion: Copper does not reacts with the H2SO4. Reason: Copper is more reactive than hydrogen. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. Assertion is true but the Reason is false. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. The statement of the Assertion is false but the Reason is true. None 14. Assertion: During the reaction esterification esters are produced.Reason: Esters are sweet smelling compounds. Assertion is true but the Reason is false. The statement of the Assertion is false but the Reason is true. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. None 15. Assertion (A): Photosynthesis is considered as an endothermic reaction.Reason (R): Energy gets released in the process of photosynthesis If Assertion is correct but Reason is incorrect. If both Assertion and Reason are correct, but reason is not the correct explanation of Assertion. If both Assertion and Reason are correct and reason is the correct explanation of Assertion. If Assertion is incorrect but Reason is correct. None 16. Assertion (A): Iron is the most widely used metal.But it is never used in its pure state. Reason (R): Pure iron is very soft and stretches easily when hot. The statement of the Assertion is false but the Reason is true. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. Assertion is true but the Reason is false. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. None 17. Assertion (A): All non metals are insulators. Reason (R): Graphite is a good conductor of electricity. Assertion is true but the Reason is false. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion The statement of the Assertion is false but the Reason is true. None 18. .Assertion (A): Rusting of iron is a slow combustionReason (R): Iron slowly reacts with oxygen and form iron oxide. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. The statement of the Assertion is false but the Reason is true. Assertion is true but the Reason is false. None 19. Assertion(A): Weak acids have low electrical conductivity.Reason(R ): Strong acids and weak acids have equal concentration of H+ ions in their solutions. A is false but R is true. Both A and R are true and R is not the correct explanation of A. A is true but R is false. Both A and R are true and R is the correct explanation of A. None 20. Assertion(A) : Carbon is the only element that can form large number of compounds. Reason (R) : Carbon is tetravalent and shows the property of catenation. Both A and R are true but R is not the correct explanation of A. A is false but R is true. A is true but R is false. Both A and R are true and R is the correct explanation of A. None Time's upTime is Up! 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