IIT JEE Practice Question and Answer
8Q: Sullen is to moody as monotonous is to what 1856 05b5cc66de4d2b4197774bfb6
5b5cc66de4d2b4197774bfb6- 1Repetitioustrue
- 2Attractivefalse
- 3Drabfalse
- 4Variedfalse
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Answer : 1. "Repetitious"
Explanation :
Answer: A) Repetitious Explanation: Here the given words, sullen and moody are synonyms to each other which means that gloomy, resentful. Similarly, repetitious and monotonous are synonyms to each other which means dull, tedious. Hence, Sullen : moody :: monotonous : repetitious.
Q: The ratio of speeds of a car, a train and a bus is 5:9:4. The average speed of the car, the bus and the train is 72 km/hr together. What is the average speed of the car and the train together ? 1856 05b5cc736e4d2b4197774f83c
5b5cc736e4d2b4197774f83c- 184 km/hrtrue
- 296 km/hrfalse
- 372 km/hrfalse
- 460 km/hrfalse
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Answer : 1. "84 km/hr"
Explanation :
Answer: A) 84 km/hr Explanation: Let the speeds of the car, train and bus be 5x, 9x and 4x km/hr respectively.Average speed = 5x + 9x + 4x/3 = 18x /3 = 6x km/hr.Also, 6x = 72 => x = 12 km/hrTherefore, the average speed of the car and train together is = 5x+9x2= 7x = 7 x 12 = 84 km/hr.
Q: What is the next number in this series ? 4, 6, 12, 18, 30, 42, 60, ? 1856 05b5cc70be4d2b4197774f2f0
5b5cc70be4d2b4197774f2f0- 171false
- 272true
- 373false
- 469false
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Answer : 2. "72"
Explanation :
Answer: B) 72 Explanation: With close observation, you will note that each number in the list is in the middle of two prime numbers. Thus: 4 is in the middle of 3 and 5, 6 is in the middle of 5 and 7, 12 is in the middle of 11 and 13, 18 is in the middle of 17 and 19, 30 is in the middle of 29 and 31. 42 is in the middle of 41 and 43, 60 is in the middle of 59 and 61. Therefore, the next number would be the one that is in the middle of the next two prime numbers, which is 72 (which is in the middle of 71 and 73).
Q: How many even numbers are there in the following sequence of numbers which are immediately followed by an odd number as well as immediately preceded by an even number? 8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1 1855 05b5cc7f2e4d2b41977751ea2
5b5cc7f2e4d2b41977751ea2- 12false
- 23false
- 34true
- 45false
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Answer : 3. "4"
Explanation :
Answer: C) 4 Explanation: We have to find out even number - even number - odd number sequence. 8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1 There are four such such even numbers: 6,8,2 and 8.
Q: Where do the greenhouse gases come from? 1855 05b5cc64ae4d2b4197774bc35
5b5cc64ae4d2b4197774bc35- 1Agriculturefalse
- 2Land-use changefalse
- 3Fosssil fuelsfalse
- 4All the abovetrue
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Answer : 4. "All the above"
Explanation :
Answer: D) All the above Explanation: Most of the emissions of greenhouse gases (GHG) come primarily from burning fossil fuels (coal, hydrocarbon gas liquids, natural gas, and petroleum) for energy use and the major greenhouse gas is of course carbon dioxide (CO2) which comes from burning fossil fuels and land-use change. But methane (CH4) and nitrous oxide (N2O), which mostly come from agriculture and waste, are also significant GHGs and shouldn't be discounted.
Q: Why is Golden Rice pale yellow in color? 1854 05b5cc6b9e4d2b4197774d6c6
5b5cc6b9e4d2b4197774d6c6- 1Rich in Beta-Carotenetrue
- 2Rich in Phycobilinsfalse
- 3Rich in Chlorophyllfalse
- 4Nonefalse
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Answer : 1. "Rich in Beta-Carotene"
Explanation :
Answer: A) Rich in Beta-Carotene Explanation: Golden Rice (Oryza sativa) denotes a genetically modified rice capable of biosynthesizing and accumulating β-carotene (provitamin A) in the endosperm, yielding a characteristic yellow color in the polished grains. Golden rice was developed to help cope with vitamin A deficiency, a problem that prevails in developing countries, affecting millions (Underwood, 2000; UNICEF, 2000). Vitamin A deficiency causes mortality and growth retardation in children and frequently impairs vision, leading to blindness. It also contributes indirectly to anemia by interfering with iron bioavailability. The endosperm of Golden Rice (Oryza sativa) is yellow due to the accumulation of β-carotene (provitamin A) and xanthophylls. The product of the two carotenoid biosynthesis transgenes used in Golden Rice results in Pale Yellow color.
Q: Twelve percent of Kalyan's monthly salary is equal to the sixteen per cent of Nandu's monthly salary. Sarnesh's monthly salary is half that of Nandu's monthly salary. If sarnesh's annual salary is Rs. 1.08 lacs, What is Kalyan's monthly salary ? 1854 05b5cc72ce4d2b4197774f746
5b5cc72ce4d2b4197774f746- 115,000false
- 236,000false
- 324,000true
- 412,500false
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Answer : 3. "24,000"
Explanation :
Answer: C) 24,000 Explanation: Let K = Kalyan's monthly salaryN = Nandu's monthly salaryS = Sarnesh's monthly salary.Then from given data, 12% of K = 16% of NS = N/2 => N = 2SK = 16/12 x N = 16/12 x 2S= 16/6 x 1.08/12 = 16/6 x 0.09 = 0.24 lacs = 24,000
Q: Which of the following statements about monosaccharide structure is true? 1854 05b5cc65ee4d2b4197774be2c
5b5cc65ee4d2b4197774be2c- 1Aldoses and ketoses differ in the position of their hydroxyl groups.false
- 2Monosaccharides can be classified according to the spatial arrangement of their atoms.true
- 3All monosaccharides contain carbon, hydrogen, oxygen, and nitrogen atoms.false
- 4A six-carbon sugar is called a pentose.false
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Answer : 2. "Monosaccharides can be classified according to the spatial arrangement of their atoms."
Explanation :
Answer: B) Monosaccharides can be classified according to the spatial arrangement of their atoms. Explanation: Monosaccharides, also called simple sugars, are the most basic units of carbohydrates. They are fundamental units of carbohydrates and cannot be further hydrolyzed to simpler compounds. Hence, Monosaccharides can be classified according to the spatial arrangement of their atoms is true about Monosaccharides.

