IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Which part of the respiratory system does emphysema damage? 1181 05b5cc62fe4d2b4197774b974
5b5cc62fe4d2b4197774b974- 1Nosefalse
- 2Lungstrue
- 3Tracheafalse
- 4Mouthfalse
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उत्तर : 2. "Lungs"
व्याख्या :
Answer: B) Lungs Explanation: Emphysema is a condition that involves damage to the walls of the air sacs (alveoli) of the lung i.e, primarily causes shortness of breath due to over-inflation of the alveoli. First, emphysema causes holes to gradually form inside the lungs' air sacs, thereby weakening their internal structure and inhibiting the exchange of oxygen and carbon dioxide.
प्र: 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 ? 1178 05b5cc6cae4d2b4197774e081
5b5cc6cae4d2b4197774e081- 1180 mtsfalse
- 2190 mtsfalse
- 3200 mtstrue
- 4210 mtsfalse
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उत्तर : 3. "200 mts"
व्याख्या :
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.
प्र: Nuclear Fission is caused by the impact of 1178 05b5cc6abe4d2b4197774d020
5b5cc6abe4d2b4197774d020- 1Electronfalse
- 2Neutrontrue
- 3Protonfalse
- 4Deutronfalse
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उत्तर : 2. "Neutron"
व्याख्या :
Answer: B) Neutron Explanation: In nuclear physics, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and releases a very large amount of energy. Thus, The Nuclear Fission is caused by the impact of Neutrons.
प्र: The length of a rectangle is 10 cm more than the breadth. Find the diagonal length of rectangle if perimeter is 44 cm ? 1177 05b5cc6cae4d2b4197774e06d
5b5cc6cae4d2b4197774e06d- 112.50 cmfalse
- 214.21 cmfalse
- 315.98 cmfalse
- 417.08 cmtrue
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उत्तर : 4. "17.08 cm"
व्याख्या :
Answer: D) 17.08 cm Explanation: Let the length of the rectangle = L cm Then the breadth of the rectangle = (L - 10) cm Perimeter of a rectangle = 2(L + B) cm => 44 = 2(L + L - 10) => 44 = 4L - 20 => 4L = 64 => L = 16 cm => B = L - 10 = 6 cm Diagonal = L2+B2 = 162+62 = 17.08 cm
प्र: 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 ? 1176 05b5cc715e4d2b4197774f477
5b5cc715e4d2b4197774f477- 12596false
- 21024true
- 3256false
- 464false
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उत्तर : 2. "1024"
व्याख्या :
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.
प्र: 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 ? 1175 05b5cc6c7e4d2b4197774deb4
5b5cc6c7e4d2b4197774deb4- 122%false
- 227%false
- 320%true
- 418%false
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उत्तर : 3. "20%"
व्याख्या :
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%
प्र: What happens during the bootstrap process? 1175 05b5cc65ee4d2b4197774be2b
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उत्तर :
व्याख्या :
A bootstrap is the process of starting up a computer. It also refers to the program that initializes the operating system (OS) during start-up. It referred to a bootstrap load button that was used to initiate a hardwired bootstrap program, or smaller program that executed a larger program such as the OS.
प्र: Which country is going to launch the world's first nuclear power plant (Sanmen Nuclear Power Station) that is immune to meltdown ? 1174 05b5cc6cae4d2b4197774e01a
5b5cc6cae4d2b4197774e01a- 1Indiafalse
- 2USAfalse
- 3Chinatrue
- 4Russiafalse
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उत्तर : 3. "China"
व्याख्या :
Answer: C) China Explanation:

