3916: Radio carbon dating process is used to know the age of:
(a) Fossils
(b) Plants
(c) Rocks
(d) All of these
3917: Which of the following statements is correct?
(a) The village was the basic unit of Chola administration.
(b) The Chola kingdom was on the decline in the 9th century.
(c) Amoghavarsha is the best remembered of the Chola kings.
(d) None of the above
3918: Recently, the USA decided to support India's membership in multi-lateral export control regimes called the "Australia Group" and the "Wassenaar Arrangement". What is the difference between them?
1. The Australia Group is an informal arrangement which aims to allow exporting countries to minimize the risk of assisting chemical and biological weapons proliferation, whereas the Wassenaar Arrangement is a formal group under the OECD holding identical objectives.
2. The Australia Group comprises predominantly of Asian, African and North American countries, whereas the member countries of Wassenaar'Arrangement are predominantly,from the European Union and American continents.
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
3919: In India, the use of carbofuran, methyl parathion, phorate and triazophos is viewed with apprehension. These chemicals are used as
(a) pesticides in agriculture
(b) preservatives in processed foods
(c) fruit-ripening agents
(d) moisturising agents in cosmetics
3920: Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of
1. Its escape into the outer strato-sphere.
2. The photosynthesis by phyto-plankton in the oceans.
3. The trapping of air in the polar ice caps
Which of the statements given above is/are correct?
(a) 1 and 2
(b) 2 only
(c) 2 and 3 only
(d) 3 only