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): MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O is redox reaction. Reason (R): MnO2 oxidises HCl to Cl2 and gets reduced to MnCl2. If both Assertion and Reason are correct and reason is the correct explanation of Assertion. 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. None 2. Assertion: Silver becomes black in colour when exposed to atmosphere. Reason: Silver reacts with H2S gas to form Ag2S which is black in colour. 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. Assertion is true but the Reason is false. None 3. 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 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 4. 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. 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. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. None 5. Assertion: Nitrogen is a non-metal. Reason: Nitrogen has 5 valence electrons. statement of the Assertion is false but the Reason is true. Assertion is true but the Reason is false. 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. None 6. Assertion(A): Weak acids have low electrical conductivity.Reason(R ): Strong acids and weak acids have equal concentration of H+ ions in their solutions. Both A and R are true and R is the correct explanation of A. A is true but R is false. Both A and R are true and R is not the correct explanation of A. A is false but R is true. None 7. 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 8. .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. 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. None 9. 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. A is true but R is false. Both A and R are true but R is not the correct explanation of A. A is false but R is true. Both A and R are true and R is the correct explanation of A. None 10. 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. Both A and R are true but 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. A is false but R is true. None 11. 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 A is true but R is false. 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. None 12. Assertion: During the reaction esterification esters are produced.Reason: Esters are sweet smelling compounds. 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 13. 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 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. 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. None 14. 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. 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 15. Assertion: Copper does not reacts with the H2SO4. Reason: Copper is more reactive than hydrogen. 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. Assertion is true but the Reason is false. None 16. 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 correct but Reason is incorrect 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 incorrect but Reason is correct. None 17. Assertion (A): Photosynthesis is considered as an endothermic reaction.Reason (R): Energy gets released in the process of photosynthesis If Assertion is incorrect but Reason is correct. If both Assertion and Reason are correct and reason is the correct explanation of Assertion. If Assertion is correct but Reason is incorrect. If both Assertion and Reason are correct, but reason is not the correct explanation of Assertion. None 18. Assertion (A): All non metals are insulators. Reason (R): Graphite is a good conductor of electricity. 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 19. 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 . 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. A is false but R is true. None 20. 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 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 Time's upTime is Up! 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