For question numbers 14, 15 and 16, two statements are given- one labeled Assertion (A) and other labeled Reason (R). Select the correct answer to these questions from the codes (a) Assertion (a), (b), (c) and (d) as given below:
(a) Both A and R are true, and R is the correct explanation of the assertion.
(b) Both A and R are true, and R is not the correct explanation of the assertion.
(c) A is true, but R is false.
(d) A is false, but R is true.

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Assertion : If the net external force on the body is zero AcademicPhysicsNCERTClass 9 14. (c) A is true, but R is false. Explanation According to Newton's second law, $Acceleration=\frac{Force}{Mass}$ Therefore, if the net external force on the body is zero, F = 0. Then there is zero acceleration of a body. Thus, from the above relation, we can say that acceleration not only depends on the force applied but also on the mass of the body on which it is applied. 15. (a) Both A and R are true, and R is the correct explanation of the assertion. Explanation Acute diseases refer to the onset of the disease that lasts for a short period, and where symptoms appear suddenly and worsen rapidly. Also, heals and disappear completely in a short period of time For example- acute illnesses like flu or common cold affect a person suddenly, worsen over a short period and then disappear. OR 15. (a) Both A and R are true, and R is the correct explanation of the assertion. Explanation Health always refers to the idea of 'being good'. So, being able to go out to the market or to visit neighbours is 'being well', and not being able to do such things is 'poor health'. Therefore, health is a state of being well enough to function well physically, mentally and socially. 16. (b) Both assertion and reason are true but the reason is not the correct explanation of assertion. Explanation Both the statement are true but the reason is not the explanation of the assertion rather it is another true statement. Tutorialspoint Updated on: 10-Oct-2022 320 Views Related Articles For question numbers 13 and 14, two statements are given – one labeled as Assertion (A) and the other labeled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below :Assertion (A): Ethanoic acid is also known as glacial acetic acid.Reason (R): The melting point of pure ethanoic acid is 290 K and hence it often freezes during winters in cold climates.(a) Both (A) and (R) are true and (R) is correct explanation of the assertion.(b) Both (A) and (R) are true but (R) is not the correct explanation of the assertion.(c) (A) is true but (R) is false.(d) (A) is false but (R) is true. Two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:Assertion (A): Following are the members of a homologous series: CH3OH, CH3CH2OH, CH3CH2CH2OHReason (R): A series of compounds with same functional group but differing by – CH2– unit is called a homologous series.(a) Both (A) and (R) are true and (R) is correct explanation of the assertion.(b) Both (A) and (R) are true but (R) is not the correct explanation of the assertion.(c) (A) is true but (R) is false.(d) (A) is false but (R) is true. Assertion and Reason type question:Assertion: Light travels in a straight line. Reason: Transparent objects allow all the light to pass through them.(A) Both A and R are true and \( \mathrm{R} \) is the correct explanation of the assertion.(B) Both \( A \) and \( R \) are true but \( R \) is not the correct explanation of the assertion.(C) \( A \) is true but \( R \) is false.(D) \( A \) is false but \( R \) is true Two statements are given — one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:Assertion (A): Following is a balanced chemical equation for the action of steam on iron : $3Fe + 4H_2O \rightarrow Fe_3O_4 + 4H_2$ Reason (R): The law of conservation of mass holds good for a chemical equation.(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).(b) Both (A) and (R) are true, but (R) is not the correct explanation of the assertion (A).(c) (A) is true, but (R) is false.(d) (A) is false, but (R) is true. Assertion (A): Esterification 1s a process m which a sweet smelling substance is produced.Reason (R): When esters relict with sodium hydroxide an alcohol and sodium salt of carboxylic acid are obtained.(a) Both A and R are true and R is correct explanation of the Assertion.(b) Both A and R are true but R is not the correct explanation of the Assertion.(c) A is true but R is false.(d) A is false but R is true. Assertion (A): In a homologous series of alcohols, the formula for the second member is C2H5OH and the third member is C3H1OH.Reason (R): The difference between the molecular masses of the two consecutive members of a homologous series is 144.(a) Both A and R are true and R is the correct explanation of the Assertion.(b) Both A and R are true but R is not the correct explanation of the Assertion.(c) A is true but R is false.(d) A is false but R is true. In the following question, two statements are given - one labelled Assertion (A) and the other labelled Reason (R):Assertion (A): If hundreds or thousands of electric bulbs are to be joined for decorating a building, then they should be connected in series with the mainline.Reason (R): When a large number of electric bulbs are connected in series, they can be controlled with just one switch.Select the correct answer to the above question from the following options:(a) Both A and R are true, and R is the correct explanation of the assertion. (b) Both A and R are true, but is not the correct explanation of the assertion.(c) A is true but R is false.(d) A is false but R is true. Two statements are given - one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (i), (ii), (iii) and (iv) as given below.Assertion (A): Carbon has a strong tendency to either lose or gain electrons to attain noble gas configuration. Reason (R): Carbon has four electrons in its outermost shell and has the tendency to share electrons with carbon or other elements. (i) Both (A) and (R) are true and (R) is correct explanation of the assertion (A). (ii) Both (A) and (R) are true, but (R) is not the correct explanation of the assertion (A). (iii) (A) is true, but (R) is false. (iv) (A) is false, but (R) is true. Assertion \( (A) \) : In the case of a rainbow, light at the inner surface of the water drop gets internally reflected.Reason \( (\mathrm{R}) \); The angle between the refracted ray and normal to the drop surface is greater than the critical angle.(A) Both Assertion and Reason are true and Reason is the correct explanation of the Assertion.(B) Both Assertion and Reason are true but Reason is not a correct explanation of the Assertion(C) Assertion is true but the Reason is false(D) Both Assertion and Reason are false. In the following question, two statements are given --one labelled Assertion (A) and the other labelled Reason (R).Assertion (A): In humans, if gene b gives blue eyes and gene B gives brown eyes then the colour of the eyes of a person having Bb combination of genes will be blue.Reason (R): The recessive gene cannot show its effect in the presence of dominant gene.Select the correct answer to the above question from the following options:(a) Both A and R are true, and R is the correct explanation of the assertion. (b) Both A and R are true, but is not the correct explanation of the assertion.(c) A is true but Ris false.(d) A is false but R is true. In the following question, two statements are given-one labelled Assertion (A) and the other labelled Reason (R):Assertion (A): When a number of resistances are connected side by side then their combined resistance is less than the smallest inpidual resistance.Reason (R): Connecting a number of resistances side by side provides additional paths for the same current to flow due to which the overall resistance decreases.Select the correct answer to the above question from the following options:Both A and R are true, and R is the correct explanation of the assertionBoth A and R are true, but R is not the correct explanation of the assertionA is true but R is false.A is false but R is true. For this question, two statements are given-one labelled Assertion (A) and the other labelled Reason (R) :Assertion (A): To have 2 or 8 electrons in the outermost shell of an atom is always considered to be the most stable electron arrangement of atoms.Reason (R): Though electrons in the outermost shell always impart stability to an atom, but 2 electrons in the outermost shell of an atom impart stability only when the outermost shell is the first shell (K shell), and no other shells are present in the atomSelect the correct answer to the above question from the options given below:Both A and R are true, and R is the correct explanation of the assertion Both A and R are true, but R is not the correct explanation of the assertion. A true but R is false.A is false but is true. Assertion (A): In the process of nuclear fission, the amount of nuclear energy generated by the fission of an atom of uranium is so tremendous that it produces 10 million times the energy produced by the combustion of an atom of carbon from coal.Reason (R): The nucleus of a heavy atom such as uranium, when bombarded with low-energy neutrons, splits apart into lighter nuclei. The mass difference between the original nucleus and the product nuclei gets converted to tremendous energy.(a) Both A and R are true and R is correct explanation of the Assertion.(b) Both A and R are true but R is not the correct explanation of the Assertion.(c) A is true but R is false.(d) A is false but R is true. Assertion : Scientist prefer metric system of units.Reason : In metric system, there are factors of 10 which are easier to remember.(1) Both assertion and reason are true. (2) Both assertion and reason are false. (3) Assertion is true, reason is false. (4) Assertion is false, reason is true. DIRECTIONS: The questions in this segment consists of two statements, one labelled as Assertion A"and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so Kickstart Your Career Get certified by completing the course Get Started Print Page Previous Next Advertisements