GATE Practice Question and Answer
8Q: Give the common name for the following compound CH32CH CH2 - Br 1725 05b5cc662e4d2b4197774bec0
5b5cc662e4d2b4197774bec0- 1Isobutyl bromidetrue
- 2Methyl bromidefalse
- 3Propyl bromidefalse
- 4Butyl bromidefalse
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Answer : 1. "Isobutyl bromide"
Explanation :
Answer: A) Isobutyl bromide Explanation:
Q: The Hydraulic Break works on the principle of _____ ? 1725 05b5cc6c2e4d2b4197774dc09
5b5cc6c2e4d2b4197774dc09- 1Pascal's Lawtrue
- 2Boyle's lawfalse
- 3Coulomb's lawfalse
- 4Bernouli's lawfalse
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Answer : 1. "Pascal's Law"
Explanation :
Answer: A) Pascal's Law Explanation:
Q: There are five bags. In the first bag we put some fruits. Each bag the number of fruits is reduced by 1/4. The last bag contains 4. Then the number of fruits in the first bag is ? 1721 05b5cc715e4d2b4197774f477
5b5cc715e4d2b4197774f477- 12596false
- 21024true
- 3256false
- 464false
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Answer : 2. "1024"
Explanation :
Answer: B) 1024 Explanation: Fruits reduced by 1/4.Total no. of bags N = 5Formula to find no. of fruits in 1st bag = 4^nLast Bag = 4 fruits.That means, 4th bag = 4 x 4 = 16 fruits3rd bag = 16 x 4 = 64 fruits2nd bag = 64 x 4 = 256 fruits1st bag = 256 x 4= 1024 fruits.
Q: Uma sold an article for 3400 and got a profit of 25%. If he had sold the article for Rs. 3265. How much profit% would Uma have got ? 1717 05b5cc6c7e4d2b4197774deb4
5b5cc6c7e4d2b4197774deb4- 122%false
- 227%false
- 320%true
- 418%false
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Answer : 3. "20%"
Explanation :
Answer: C) 20% Explanation: Given 125% ---- 3400 => 100% ---- ? => ? = 3400x100/125 = 2720 => Cost price of the article = Rs. 2720 Profit when article sold at Rs. 3265 = 3265 - 2720 = 545 Hence, Profit% = Gain x 100/cost price => P% = 545 x 100/2720 => P% = 20%
Q: In a mixture, the ratio of juice and water is 4 : 3. By adding 6 litre water the ratio of juice and water will be 8 : 7. What is the amount of juice in the original mixture ? 1717 05b5cc6c9e4d2b4197774dfbb
5b5cc6c9e4d2b4197774dfbb- 138 litfalse
- 296 litfalse
- 348 littrue
- 452 litfalse
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Answer : 3. "48 lit"
Explanation :
Answer: C) 48 lit Explanation: Let the amount of juice and water in original mixture '4x' litre and '3x' litre respectively. According to given data, 4x/3x+6 =8/7 28x=24x+48 28x–24x=48 4x = 48 x = 12 Amount of juice = 4x = 4×12 = 48 litre.
Q: Find the length of a train if it takes 10 seconds to cross a pole and double of this time to cross a platform of length 200 mts ? 1716 05b5cc6cae4d2b4197774e081
5b5cc6cae4d2b4197774e081- 1180 mtsfalse
- 2190 mtsfalse
- 3200 mtstrue
- 4210 mtsfalse
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Answer : 3. "200 mts"
Explanation :
Answer: C) 200 mts Explanation: Let the length of the train be 'L' mts let the speed of the train be 'S' m/s Given it crosses a pole in 10 sec=> L/S = 10 ......(1)Given it takes 20 sec (double of pole) to cross a platform of length 200 mts => (L + 200)/S = 20 => L/S + 200/S = 20 But from (1) L/S = 10 => 200/S = 20 - 10 => S = 20 m/s Then, from (1) => L = 10 x 20 = 200 mts. Hence, the length of the train = 200 mts.
Q: Which of these is a starting point for primary succession? 1716 05b5cc68ee4d2b4197774c412
5b5cc68ee4d2b4197774c412- 1a neglected yardfalse
- 2a surface exposed by a retreating glaciertrue
- 3an abandoned cityfalse
- 4abandoned farmlandfalse
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Answer : 2. "a surface exposed by a retreating glacier"
Explanation :
Answer: B) a surface exposed by a retreating glacier Explanation:
Q: Which color has the highest frequency? 1713 05b5cc6a7e4d2b4197774ce52
5b5cc6a7e4d2b4197774ce52- 1Violettrue
- 2Redfalse
- 3Indigofalse
- 4Greenfalse
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Answer : 1. "Violet"
Explanation :
Answer: A) Violet Explanation: In VIBGYOR. It has colors ordered from highest to lowest frequency. Violet > Indigo > Blue > Green > Yellow > Orange > Red That says Violet has the highest frequency. We know, Speed of light = Frequency x Wavelength => As frequeny is inversely proportional to wavelength i.e, as frequwncy goes high wavelength goes down. So, the violet color has the highest frequency.