IIT JEE Practice Question and Answer
8Q: Where are Maglev trains used? 1625 05b5cc6abe4d2b4197774cfcc
5b5cc6abe4d2b4197774cfcc- 1Londonfalse
- 2Russiafalse
- 3Germanyfalse
- 4Japantrue
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Answer : 4. "Japan"
Explanation :
Answer: D) Japan Explanation: Maglev trains are used in Japan, South Korea and China only. Maglev derived from magnetic levitation using the principle of magnetic repulsion is a system of train transportation that uses two sets of magnets, one set to repel and push the train up off the track as in levitation then another set to move the 'floating train' ahead at great speed taking advantage of no friction. Maglev trains are therefore quieter and smoother than conventional trains, and have the potential for much higher speeds Despite over a century of research and development, maglev transport systems are in operation in just three countries Japan, South Korea and China. Hence Maglev -- Magnetic-levitation.
Q: What does this symbol mean '&'? 2300 05b5cc6abe4d2b4197774cfc6
5b5cc6abe4d2b4197774cfc6- 1Caretfalse
- 2Barfalse
- 3Ampersandtrue
- 4Reversed Caretfalse
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Answer : 3. "Ampersand"
Explanation :
Answer: C) Ampersand Explanation: '&' is a Logical Symbol and is called as Ampersand. ^ is called Caret - is called Bar v is called Reversed Caret.
Q: Lightning heats the surrounding air to 1960 05b5cc6abe4d2b4197774cfb7
5b5cc6abe4d2b4197774cfb7- 1300 deg Centfalse
- 23000 deg Centfalse
- 330000 deg Centtrue
- 4300000 deg Centfalse
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Answer : 3. "30000 deg Cent"
Explanation :
Answer: C) 30000 deg Cent Explanation: Lightning is extremely hot — a flash can heat the air around it to temperatures five times hotter than the sun’s surface. This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash. Lightning heats the surrounding air to about 30,000 degrees Centigrades.
Q: Which statement best describes electrons? 1850 05b5cc6abe4d2b4197774cfad
5b5cc6abe4d2b4197774cfad- 1Electrons orbit around the nucleustrue
- 2Electrons are composed of protons and neutronsfalse
- 3Electrons reside in the nucleusfalse
- 4Electrons have a positive chargefalse
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Answer : 1. "Electrons orbit around the nucleus"
Explanation :
Answer: A) Electrons orbit around the nucleus Explanation: Electrons orbit around the nucleus is correct about them.
Q: A merchant commences with a certain capital and gains annually at the rate of 30 per cent. At the end of 2 years he has worth Rs 10,000. What was the original capital? 1427 05b5cc6abe4d2b4197774cfb2
5b5cc6abe4d2b4197774cfb2- 1Rs. 4987false
- 2Rs. 5148false
- 3Rs. 5917true
- 4Rs. 6254false
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Answer : 3. "Rs. 5917"
Explanation :
Answer: C) Rs. 5917 Explanation: Let the Original capital amount be Rs. P Given after 2 years the amount is Rs. 10000 Rate of interest = 30% According to the question, P x 130100 x 130100 = 10000=> P = 1000000169 = 5917 Therefore, the capital amount P = Rs. 5917
Q: What type of Lipid is Estrogen? 1463 05b5cc6abe4d2b4197774cfa3
5b5cc6abe4d2b4197774cfa3- 1phospholipidfalse
- 2steroidtrue
- 3waxfalse
- 4triglyceridefalse
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Answer : 2. "steroid"
Explanation :
Answer: B) steroid Explanation: Estrogen is a group of steroid hormone that control the development and maintenance of an individuals feminine characteristics. Natural estrogen exists in men as well as women and are found in higher amounts in women Especially in those of reproductive age. Estrogens are hormones which are responsible to the body functions of the female body system such as menstruation, development of the female body such as pubic hair, breasts and development of the proportions of the body. Lipids act as best energy storage molecules as the cleavage of fatty acids produces both energy and metabolic water which is a main component in almost all lipids.
Q: Unlike Mitosis, Meiosis results in the formation of 1668 05b5cc6abe4d2b4197774cfa8
5b5cc6abe4d2b4197774cfa8- 12N daughter cellsfalse
- 2Haploid cellstrue
- 3body cellsfalse
- 4Diploid cellsfalse
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Answer : 2. "Haploid cells"
Explanation :
Answer: B) Haploid cells Explanation: Unlike Mitosis, Meiosis results in the formation of 4 Genetically different cells. Meiosis results in the formation of 4 Haploid daughter cells from one Diploid parent cell.
Q: I can Honk without using a Horn. Who am I? 2047 05b5cc6abe4d2b4197774cf9e
5b5cc6abe4d2b4197774cf9e- 1Goosetrue
- 2Cranefalse
- 3Penguinfalse
- 4Hummingfalse
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Answer : 1. "Goose"
Explanation :
Answer: A) Goose Explanation: Goose can Honk without using a Horn. Geese are waterfowl of the family Anatidae.

