CAT Question of the Day Answer the question based on the passage given below.
Regular, direct measures of the amount of CO2 in the air date to the 1950s. Those of the oceans’ acidity began only in the late 1980s. Since it started, that acidity has risen from pH 8.11 to pH 8.06. A fall of one pH point is a tenfold rise in acidity, and this fall of 0.05 points in just over three decades is a rise in acidity of 12%. Patchier data that go back further suggest there has been a 26% rise in oceanic acidity since the beginning of the industrial revolution, 250 years ago. Projections made by assuming that carbon-dioxide emissions will continue to increase in line with expected economic growth indicate this figure will be 170% by 2100. Another prediction is that once the seas have become more acidic, they will not quickly recover their alkalinity. Ocean life, in other words, will have to get used to it. The variable people most worry about is called omega. This is a number that describes how threatening acidification is to seashells and skeletons. Lots of these are made of calcium carbonate, which comes in two crystalline forms: calcite and aragonite. Many critters, especially reef-forming corals and free-swimming molluscs prefer aragonite for their shells and skeletons. Unfortunately, this is more sensitive to acidity than calcite is. According to the passage, which of the following is untrue? | OPTIONS | | |  | 1) | From the 1980s the pH of the world's oceans rose from 8.06 to 8.11. | | | 2) | On the pH scale, lower the pH means higher the acidity. | | | 3) | Carbon-dioxide emissions cause the oceans to become more acidic. | | | 4) | It is unlikely that the free-swimming molluscs will survive in an ocean with very low pH. |
Tip of the Day Style of a passage is defined as the way in which the content of the passage is presented to the reader whereas tone is a reflection of the author's attitude while presenting this content. Thus, style is related to writing style whereas tone is related to written content. Last year's Question of the day (15-Apr-13) Three men (Tom , Peter and Jack) and three women (Eliza , Anne and Karen) are spending a few months at a hillside. They are to stay in a row of nine houses, which are facing north, each one living in his or her own house. Following are the details given regarding each of their houses : - Anne , Tom and Jack don't want to stay in any house, which is at the end of the row
- Eliza and Anne needs their neighborhood houses to be empty
- When Karen, Peter and Jack stand facing north, Karen finds that houses of both Peter and Jack are on her left-hand side
- Between Anne and Jack's house there is just one vacant house
- The house occupied by Tom is next to the house at the end of the row
- No two vacant houses are together, are no vacant house is at any end
- Let N be the total number of different arrangements of the houses in which they can stay
Denote n P(X) as the position of the house (from the left) at which the person X is staying and n P(X) ranges from 1 to 9 where n is the arrangement number (integer) and n =1 to N, so 2 P(Jack) will denote, the position of Jack's house from the left in the second arrangement, as there can be N different arrangements of houses n P(X) will take values accordingly, then which of the following is true? | OPTIONS | | | | | 1) | If 6 P(Jack) = 2 , 7 P(Peter) = 1, 7 P(Eliza) = 4 then 6 P(Anne) + 7 P(Karen) = 12 | | | 2) | If n P(Eliza) = 1,then number of possible values of n are 5 and if n P(Tom) = 1, then number of possible values of n is 1 | | | 3) | Value of N is 9 | | | 4) | Let Jack and Peter are neighbors in k different arrangements, let's number those arrangements as 1st, 2nd, . . . k-th arrangement, then
 | | | 5) | None of the above |
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