1866: Radioactive element which has been found to have large reserves in India is:
(a) Thorium
(b) Uranium
(c) Radium
(d) Plutonium
1867: The bats can fly in the dark because:
(a) They have a better vision in the dark
(b) The light startles them
(c) They produce ultrasonics
(d) None of the above
1868: It is possible to produce algae based biofuels, but what is/are the likely limitation(s) of developing countries in promoting this industry?
1. Production of algae based biofuels is possible in seas only and not on continents.
2. Setting up and engineering the algae based biofuel production requires high level of expertise/technology until the construction is completed.
3. Economically viable production necessitates the setting up of large scale facilities which may raise ecological and social concerns.
Select the correct answer using the code given below:
a. 1 and 2 only
b. 2 and 3 only
c. 3 only
d. 1, 2 and 3
1869: Out of the three annual examinations, each with a total of 500 marks, a student secured average marks of 45% and 55% in the first and second annual examinations. To have an overall average of 60%, how many marks does the student need to secure in the third annual examination ?
(a) 450
(b) 400
(c) 350
(d) 300
1870: Assertion (A) :
Panchayati Raj institutions were set up to decentralise planning to village level.
Reason (R) :
Village panchayats are in a better position to have a proper appreciation of their developmental needs.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true