GATE Practice Question and Answer
8Q: Microbial Type Culture Collection Centre is situated at 1755 05b5cc62ae4d2b4197774b8cd
5b5cc62ae4d2b4197774b8cd- 1Chandigarhtrue
- 2New Delhifalse
- 3Hyderabadfalse
- 4Bangalorefalse
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Answer : 1. "Chandigarh"
Explanation :
Answer: A) Chandigarh Explanation:
Q: Oxidation Number of 'S' in H2SO4? 1755 05b5cc6b3e4d2b4197774d491
5b5cc6b3e4d2b4197774d491- 1+6true
- 2+2false
- 3-6false
- 4-2false
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Answer : 1. "+6"
Explanation :
Answer: A) +6 Explanation: In H2SO4, Hydrogen has a charge of +2, with each hydrogen has +1. Oxygen has a charge of -8, with each oxugen has -2. Total charge = (2 - 8) = -6 Therefore, the Oxidation number of Sulphur S is '+6' because to make the compound stable.
Q: Elisa test is employed to diagnose 1754 05b5cc68ee4d2b4197774c3e4
5b5cc68ee4d2b4197774c3e4- 1HIVtrue
- 2Cancerfalse
- 3Tuberculosisfalse
- 4Poliofalse
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Answer : 1. "HIV"
Explanation :
Answer: A) HIV Explanation: ELISA - Enzyme-Linked Immuno Sorbent Assay. An ELISA test may be used to diagnose: HIV, which causes AIDS. An ELISA also called EIA, is a test that detects and measures antibodies in your blood. Antibodies are proteins that your body produces in response to harmful substances called antigens.
Q: The area of a square is equal to the area of a rectangle. The length of the rectangle is 5 cm more than a side of the square and its breadth is 3 cm less than the side of the square. What is the perimeter of the rectangle ? 1753 05b5cc6c0e4d2b4197774db0f
5b5cc6c0e4d2b4197774db0f- 115 cmfalse
- 218 cmfalse
- 334 cmtrue
- 426 cmfalse
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Answer : 3. "34 cm"
Explanation :
Answer: C) 34 cm Explanation: Let the side of the square be 's' cm length of rectangle = (s+5) cm breadth of rectangle = (s-3)cm (s+5) (s-3) = s2 - 5s - 3s - 15 = s2 2s = 15 Perimeter of rectangle = 2(L+B) = 2(s+5 + s–3) = 2(2s + 2) = 2(15 + 2) = 34 cm
Q: Ozone hole refers to 1753 05b5cc6bbe4d2b4197774d82a
5b5cc6bbe4d2b4197774d82a- 1Decrease in the thickness of ozone layer in Stratospheretrue
- 2Increase in thickness of ozone layerfalse
- 3Decrease in the ozone layer in Tropospherefalse
- 4Hole in the ozone layerfalse
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Answer : 1. "Decrease in the thickness of ozone layer in Stratosphere"
Explanation :
Answer: A) Decrease in the thickness of ozone layer in Stratosphere Explanation:
Q: You will always find me in the past. I can be created in the present, But the future can never taint me. What am I? 1752 05b5cc639e4d2b4197774baab
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Answer :
Explanation :
I am History. Yes, history refers to all the past, but we can create history in the presentand it cannot be polluted in the future.
Q: On selling 17 balls at Rs.720 there is a loss equal to the cost price of 5 balls. Then what is the cost price of a ball is ? 1750 05b5cc6c9e4d2b4197774dfb0
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Answer :
Explanation :
From given data, (C.P. of 17 balls) - (S.P. of 17 balls) = (C.P. of 5 balls) C.P. of 12 balls = S.P. of 17 balls = Rs.720. Hence, C.P. of 1 ball = Rs.720/12 = Rs. 60.
Q: A Tank is normally filled in 9 hours but takes four hours longer to fill because of a leak in its bottom. If the tank is full, the leak will empty it in ? 1749 05b5cc6d4e4d2b4197774e5b1
5b5cc6d4e4d2b4197774e5b1- 132.5 hrsfalse
- 229.25 hrstrue
- 330.30 hrsfalse
- 431 hrsfalse
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Answer : 2. "29.25 hrs"
Explanation :
Answer: B) 29.25 hrs Explanation: Let the leak will empty the tank in x hrs Then, 1/9 - 1/x = 1/13 x = 29.25 hrs