IIT JEE Practice Question and Answer
8Q: The sum of three numbers is 98. If the ratio of the first to the second is 2:3. And that of the second to the third is 5:8, then the second number is: 1479 05b5cc6dfe4d2b4197774eae9
5b5cc6dfe4d2b4197774eae9- 130true
- 227false
- 323false
- 433false
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Answer : 1. "30"
Explanation :
Answer: A) 30 Explanation: Then, A:B = 2:3 and B:C = 5:8= (5 x 3/5) : (8 x 3/5) = 3:24/5A:B:C = 2:3:24/5= 10:15:24 => B = 98 x 15/49 = 30.
Q: Important component that helps in clotting of the blood is called ____. 1477 05b5cc6c5e4d2b4197774dd8c
5b5cc6c5e4d2b4197774dd8c- 1Haemoglobinfalse
- 2Plateletstrue
- 3Serumfalse
- 4Plasmafalse
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Answer : 2. "Platelets"
Explanation :
Answer: B) Platelets Explanation: Blood Platelets are the components of the blood that are helpful in clotting of the blood.
Q: Hormones are chemicals secreted and regulated by the endocrine system. 1476 05b5cc678e4d2b4197774c15d
5b5cc678e4d2b4197774c15d- 1TRUEtrue
- 2FALSE Answer & Explanation Answer:false
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Answer : 1. "TRUE"
Explanation :
Answer: A) TRUE Explanation: True. Hormones are chemicals secreted and regulated by the endocrine system.
Q: Most Explosive Type of Volcano is 1476 05b5cc6b2e4d2b4197774d379
5b5cc6b2e4d2b4197774d379- 1The Cinder Conefalse
- 2Rhyolite caldera complexestrue
- 3Shield Volcanoesfalse
- 4The Basault Volcanoesfalse
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Answer : 2. "Rhyolite caldera complexes"
Explanation :
Answer: B) Rhyolite caldera complexes Explanation:
Q: Which of the following is the strongest acid? 1476 05b5cc6b7e4d2b4197774d5ec
5b5cc6b7e4d2b4197774d5ec- 1ClCH2COOHfalse
- 2BrCH2COOHfalse
- 3FCH2COOHtrue
- 4ICH2COOHfalse
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Answer : 3. "FCH2COOH"
Explanation :
Answer: C) FCH2COOH Explanation: FCH2COOH is the strongest acid out of all .Since the electron withdrawing inductive effect (-I effect) of the halogens decreases in the order F>Cl> Br> I , therefore the acidic strength of the α- halo acids decreases in the same order. FCH2COOH > ClCH2COOH > BrCH2COOH > ICH2COOH.
Q: 'Minamata' disease was caused by ? 1474 05b5cc723e4d2b4197774f6b4
5b5cc723e4d2b4197774f6b4- 1Leadfalse
- 2Mercurytrue
- 3Cadmiumfalse
- 4Zincfalse
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Answer : 2. "Mercury"
Explanation :
Answer: B) Mercury Explanation:
Q: What lives in the winter dies in the summer? 1474 05b5cc672e4d2b4197774c077
5b5cc672e4d2b4197774c077- 1Plantsfalse
- 2Animalsfalse
- 3Icycletrue
- 4None of the abovefalse
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Answer : 3. "Icycle"
Explanation :
Answer: C) Icycle Explanation: An icycle, a hanging spike of ice formed by the freezing of dripping water forms due to cool in winter and dies in summer due to hot.
Q: Manisha went to shop with certain amount, with which she can buy 50 Chacobar or 40 Fivestar. She uses 10% amount for petrol and out of the remaining balance, she purchases 20 Fivestar and some Chacobar. Find the number of Chacobar she can buy? 1473 05b5cc6b3e4d2b4197774d441
5b5cc6b3e4d2b4197774d441- 120true
- 224false
- 326false
- 428false
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Answer : 1. "20"
Explanation :
Answer: A) 20 Explanation: Let the total amount be 200 {L.C.M of 40 and 50} Chacobar C.P. = 200/50 = 4 Fivestar C.P = 200/40 = 5 Remaining Money after petrol = [200 - 200×10%] = 180 Remaining money after buying fivestars = [180 - 20×5] = 80 So number of Chacobar she can buy = 80/4 = 20