Doubtnut : Assertion Reason | Chemistry | Class 10 | Swati Ma'am

These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following five reponses (a) If both Assertion and Reason arecorrect and Reason is the correct explanation of Asserrtion. (b) If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (c ) If Assertion is true but Reason is false. (d) If Assertion is false but Reason is true. Assertion Consider a person of mass 80 kg who is climbing a ladder. In climbing up a vertical distance of 5 m, the contact force exerted by ladder on person's feet does 4000 J of work. [Consider g=10 ms^(-2) ] Reason Work done by a force F is defined as the dot product of force with the displacement of point of application of force.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c ) If assertion is true but reason is false. (d) If assertion and reason are false. Q. Assertion: For small deformation, the stress and strain are proportional to each other. Reason: A class of solids called elastomers does not obey Hooke's law. Reason: A class of solids called elastomers does not obey Hooke's law.

The marks obtained by 9 students in a chemistry test are 50, 69, 20, 33, 53, 39, 40, 65 and 59 . If the mean deviation about the median of this data is lambda , then the value of (9lambda)/(10) is equal to

Assertion:The chemistry of the early actinoids is more comlicated than the corresponding lanthanoids. Reason:Outer electronic configuration of actinoids is (n-2)f^(1-14)(n-1)d^(0-1)ns^(2) .

Assertion : The electromagnetic waves are transverse in nature. Reason : Waves of wavelength 10 μm are radiowave and microwave.