2901: Consider the following agricultural practices :
1. Contour bunding
2. Relay cropping
3. Zero tillage
In the context of global climate change, which of the above helps/help in carbon sequestration / storage in the soil?
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) None of them
2902: Which of the following statements is incorrect?
(a) Chandragupta Vikramaditya killed the Saka
(b) Samudragupta is known as Indian Napolean
(c) Skandagupta defeated Huns
(d) Kumaragupta restored the embankment of Sundarsana Lake
2903: What is the role of ultraviolet (UV) radiation in the water purification systems?
1. It inactivates/kills the harmful micro-organism in water.
2. It removes all the undesirable odours from the water.
3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
2904: The average of X1, X2 and X3 is 14. Twice the sum of X2 and X3 is 30. What is the value of X1 ?
(a) 20
(b) 27
(c) 16
(d) 12
2905: Consider the following statement :
1. The Nobel Prize Awarding Ceremony takes place on December 10 to every year.
2. The Nobel Prize for Literature was added later on to the other five area . Physics, Chemistry, Physiology or Medicine, Peace and Economics.
Which of the statements given above is/are correct ?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2