2941: Swaraj as a national demand was first made by:
(a) Bal Gangadhar Tilak
(b) Dadabhai Naoroji
(c) Jawaharlal Nehru
(d) Chitaranjan Das
2942: With reference to micro-irrigation, which of the following statements is/are correct ?
1. Fertilizer/nutrient loss can be reduced.
2. It is the only means of irrigation in dry land farming.
3. In some areas of farming, receding of ground water table can be checked.
Select the correct answer using the codes given below:
(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
2943: The average height of 2 students in a class is 115 cm. Ten more students with an average height of 130 cm join them. Therefore, the average height of the group of students now becomes:
(a) 110 cm
(b) 120 cm
(c) 130 cm
(d) 140 cm
2944: The most reactive among the halogens is
(a) fluorine
(b) chlorine
(c) bromine
(d) iodine
2945: Which of the following have coral reefs?
1. Andaman and Nicobar Islands
2. Gulf of Kachchh
3. Gulf of Mannar
4. Sunderbans
Select the correct answer using the code given below.
(a) 1, 2 and 3 only
(b) 2 and 4 only
(c) 1 and 3 only
(d) 1, 2, 3 and 4