The assertion correctly defines the property of elasticity. The reason explains that the restoring force is a result of interatomic and intermolecular forces, which is true. However, while the reason is accurate, it does not necessarily explain the assertion in all contexts.
The Correct answer is: Both (A) and (R) are true and (R) is the correct explanation (A)
If the given graph shows the load (W) attached to and the elongation ($\Delta l$) produced in a wire of length 1 meter and cross-sectional area 1 mm$^2$, then the Young's modulus of the material of the wire is
20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The molarity of the sodium iodide solution is _____ M. (Nearest Integer value) (Given : Na = 23, I = 127, Ag = 108, N = 14, O = 16 g mol$^{-1}$)