Question

Questions number 12 to 15 are Assertion-Reason tyge questions:
In the following question, a statement of Assertion followed by a corresponding statement of reason
following statements, choose the correct one.
(a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanat
of the Assertion (A)
(6) Both Assertion (A) and Reason (R) are correct statements but Reason (R) is not the correct
explanation of the Assertion (A).
(c) Assertion (A) is correct but Reason (R) is incorrect statements.
(d) Assertion (A) is incorrect but Reason (R) is correct statements
12. Assertion (A) : Hydrogen has one electron in its orbit but it produce several spectral lines
Reason (R) : There are many excited energy level available
13. Assertion (A): Helium and beryllium have similar outer electronic configuration of the type ns
Reason (R): Both are chemically inert.
14. Assertion (A): Atomic mass of sodium is 23 u.
Reason (R) : An atom of sodium is 23 times heavier than an atom of carbon - 12 isotopes.​

Answer 1

Answer:

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Explanation:

Answer :

B

Solution :

Bulk modulus of elasticity measures how good the body is to regain its original volume on being compressed. Therefore it represents incompressibility of the material <br> Bulk modulus

<br> Where

Change in pressure <br> and

change in volume <br> Hence, negative sign implies that when the pressure increases, volume decreases and vice-versa.