GATE Practice Question and Answer
8Q: A train covered k km at 40 kmph and another 2k km at 20 kmph. Find the average speed of the train in covering the entire 3k km ? 1540 05b5cc6dce4d2b4197774e965
5b5cc6dce4d2b4197774e965- 128 kmphfalse
- 224 kmphtrue
- 326 kmphfalse
- 432 kmphfalse
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Answer : 2. "24 kmph"
Explanation :
Answer: B) 24 kmph Explanation: Total time taken = k/40 + 2k/20 hours = 5k/40 = k/8 hours Average speed = 3k/(k/8) = 24 kmph.
Q: Electrical Arcing occurs when 1539 05b5cc69be4d2b4197774c7d7
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Answer :
Explanation :
An electric arc is a visible plasma discharge between two electrodes that is caused by electrical current ionizing gasses in the air. Electric arcs occur in nature in the form of lightning.
Q: Where are genes located in the cell? 1539 05b5cc69be4d2b4197774c7d8
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Answer :
Explanation :
Genes are located on DNA present in the chromosome. Chromosomes are present in the nucleus of the cell.
Q: Consumers that eat both plants and animals are 1538 05b5cc642e4d2b4197774bb68
5b5cc642e4d2b4197774bb68- 1Carnivoresfalse
- 2Herbivoresfalse
- 3Omnivorestrue
- 4Tertiary consumersfalse
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Answer : 3. "Omnivores"
Explanation :
Answer: C) Omnivores Explanation: An omnivore is an animal that eats food from both plants and animals. Animals that eat other animals are called carnivores. Carnivores that eat herbivores are called secondary consumers, and carnivores that eat other carnivores are called tertiary consumers.
Q: Which solution has the highest pH? 1537 05b5cc6a2e4d2b4197774cb8a
5b5cc6a2e4d2b4197774cb8a- 150.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq)true
- 250.0 mL 0.0500 M sodium hydroxide, NaOH (aq)false
- 350.0 mL 0.0500 M nitric acid, HNO3 (aq)false
- 450.0 mL 0.0500 M nitrous acid, HNO2 (aq)false
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Answer : 1. "50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq)"
Explanation :
Answer: A) 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) Explanation: 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) has the highest pH value. Sodium hydroxide and Calcium hydroxide are strong bases so they completely ionize in solution. Because they ionize at the same rate, and Calcium hydroxide has the higher pH calculated, then Calcium hydroxide, in fact, has the highest pH. Nitric acid is a strong acid, so it completely ionizes in water. Whilst nitrous acid is a weak acid. Therefore, the nitric acid solution has the LOWEST ph.
Q: A farmer divides his herd of k cows among his 4 sons, so that one son gets one half of the herd, the second gets one-fourth, the third gets one-fifth and the fourth gets 9 cows. Then k is equal to ? 1537 05b5cc73de4d2b4197774f92a
5b5cc73de4d2b4197774f92a- 1160false
- 2120false
- 3140false
- 4180true
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Answer : 4. "180"
Explanation :
Answer: D) 180 Explanation: Given total number of cows = kNow, 1st son share = k/22nd son share = k/43rd son share = k/54th son share = 9 (k) + (k/4) + (k/5) + 9 = k=> k - (19k/20) = 9=> (20k-19k)/20 = 9=> k = 180.
Q: Name one problem that led to the civil war. 1536 05b5cc67be4d2b4197774c1c7
5b5cc67be4d2b4197774c1c7- 1Slaveryfalse
- 2Economic reasonsfalse
- 3State's Rightsfalse
- 4All the abovetrue
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Answer : 4. "All the above"
Explanation :
Answer: D) All the above Explanation:
Q: Find the Value of ? 5.112.2+5.553.3+6.31.4+7.22.001 = ? x 3.34 1536 05b5cc6b1e4d2b4197774d318
5b5cc6b1e4d2b4197774d318- 181false
- 277false
- 373false
- 489true
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Answer : 4. "89"
Explanation :
Answer: D) 89 Explanation: This can be done in a method called Approximation. Now, 52 + 63 + 6 + 72 = ? x 3.3425 + 216 + 6 + 49 = ? x 3.34296 = ? x 3.34? = 2963.34 = 88.622 ≅ 89