2781: The working principle of a washing machine is
(a) centrifugation
(b) dialysis
(c) reverse osmosis
(d) diffusion
2782: 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
2783: According to the ancient Indian geographical concept, "Bharatvarsha" was a part of
(a) Pushkaradweepa
(b) Jambudweepa
(c) Kraunchadweepa
(d) Kushdweepa
2784: Assertion (A):
The Central Rural Sanitation Programme was launched in 1986 to improve the quality of life of rural people in India.
Reason (R) :
Rural sanitation is a subject in the Concurrent List in the Constitution of India.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
2785: Quartizite is metamorphosed from
(a) Limestone
(b) Obsidian
(c) Sandstone
(d) Shale