A spherometer is an instrument used primarily to measure the curvature of spherical surfaces (both concave and convex) and the thickness of thin plates. It cannot measure properties of liquids, such as specific rotation, which is a measure of the optical activity of a substance in solution.
So, the correct answer is option 2.
Electrolysis of 600 mL aqueous solution of NaCl for 5 min changes the pH of the solution to 12. The current in Amperes used for the given electrolysis is ….. (Nearest integer).
If the system of equations \[ x + 2y - 3z = 2, \quad 2x + \lambda y + 5z = 5, \quad 14x + 3y + \mu z = 33 \] has infinitely many solutions, then \( \lambda + \mu \) is equal to:}