74) The ratio of the amount of metal actually dissolved to the theoretical amount calculated, expressed in percentage is the

75) In _____ analysis, the interaction between matter and any portion of the electromagnetic spectrum is used.

76) Which can be electrodeposited from a water-based bath.

77) A rectangular park has perimeter 80 m and area 400 square meter. Its length and breadth in meters are

78) In a deck of 52 playing cards, the probability of getting an Ace or a red King is