Reply: The cause of periodicity in properties could be the repetition of similar outer Digital configuration just after certain regular intervals.
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(d) Both of these can clearly show a better change in temperature given that the temperature transform is determined by factors aside from unique heat capability.
(e) The villi enormously increase the inner surface spot in the intestines which facilitates the absorption of digested foodstuff.
The supplied determine depicts the graph of work completed vs. displacement below a constant drive of 10N. Which of the subsequent statements is legitimate?
Solution: (d) inversely proportional to its length but directly proportional on the square root of the
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Be—H bonds are polar because of change in their electronegativity though the bond polarities cancel each other. Thus, molecule has resultant dipole minute of zero.
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Even though the quantity of new interesting and repulsive forces is the same, even so the magnitude of the desirable forces is much more. Thus, when two hydrogen atoms approach one another, the general prospective energy from the process decreases. Consequently, a secure molecule of hydrogen is fashioned.
In contrast. For noble gases have positive electron achieve enthalpy simply because energy must be supplied to your ingredient.
In NH3, the dipole moments of your three N—H bonds are in the same route as being the lone pair of electron. But in NF3, the dipole moments of your three N—File bonds are within the course opposite to that on the lone pair. Thus, the resultant dipole second in NH3 is more than in NF3.
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(a) Numerous villi CBSE Class 12 enormously boost the inner surface location of the smaller intestine which facilitates the absorption of digested food.