81: Consider the following European missions during the Mughal period :
1. Thomas Roe
2. Tavernier
3. Rudolf Acquaviva
The correct chronological order of their visits is
(a) 1, 2, 3
(b) 2, 3, 1
(c) 2, 1, 3
(d) 3, 1, 2
82: A car runs at a speed of 40 km per hour during the first half of the journey and at a speed of 60 km per hour during the second half of the journey. The average speed of the car is:
(a) 48 kmph
(b) 50 kmph
(c) 52 kmph
(d) 54 kmph
83: Insect resistant cotton plants have been genetically engineered by inserting a gene from a/an
(a) virus
(b) bacterium
(c) insect
(d) plant
84: With reference to the usefulness of the by-products of sugar industry, which of the following statements is/are correct?
1. Bagasse can be used as biomass fuel for the generation of energy.
2. Molasses can be used as one of the feed stocks for the production of synthetic chemical fertilizers.
3. Molasses can be used for the production of ethanol.
Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
85: Which one of the following ports shown on the rough outline map of India is a riverine port ?
(a) 1
(b) 2
(c) 3
(d) 4