- When an international team of scientists pumped a carbon dioxide and water mix into underground basalt rocks, basic chemistry took over. The acidic mixture dissolved rocks’ calcium and magnesium and formed limestone. Basically, carbon dioxide is converted into stone, exclaimed the scientists.
Which one of the following statements best reflects the most logical, rational, and practical suggestion implied by the passage?
(a) It is a cheap and practical method to produce limestone at the commercial level for building purposes.
(b) This can be used as one of the methods of carbon sequestration.
(c) Basalt rock can be made a good source of calcium and magnesium minerals by this method.
(d) Good rock-dissolving acid can be produced by mixing carbon dioxide
and water. - “The history of science is the real history of mankind.” In this striking epigram, a nineteenth-century writer links science with its background. Like most epigrams, its power lies in emphasizing by contrast an aspect of truth which may be easily overlooked. In this case, it is easy to overlook the relations between science and mankind, and to treat the former as some abstract third party, which can sometimes be praised for its beneficial influences, but frequently and conveniently blamed for the horrors of war. Science and mankind cannot be divorced from time to time at men’s convenience. Yet we have seen that, in spite of countless opportunities of improvement, the opening years of the present period of civilization have been dominated by international conflict. Is this the inevitable result of the progress of science or does the fault lie elsewhere?
Which of the following is/are emphatically conveyed by the author of the passage?
1. Without science, mankind could not have continued to exist till today.
2. It is the science that will ultimately determine the destiny of mankind.
Select the correct answer using the code given below.
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2 - What is the rightmost digit preceding the zeros in the value of 3030?
(a) 1
(c) 7
(b) 3
(d) 9 - How many consecutive zeros are there at the end of the integer obtained in the product 12 x 24 x 36 x48 x…x2550?
(a) 50
(b) 55
(c) 100
(d) 200 - What percent of water must be mixed with honey so as to gain 20% by selling the mixture at the cost price of honey?
(a) 20% (c) 5%
(b) 10%
(d) 4%
Prelims Prep CSAT Day 1
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