IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Organisms need Nutrients in order to 1774 05b5cc6b6e4d2b4197774d583
5b5cc6b6e4d2b4197774d583- 1Breaking down foodtrue
- 2Utilize chemical compoundsfalse
- 3recyclingfalse
- 4Nonefalse
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उत्तर : 1. "Breaking down food"
व्याख्या :
Answer: A) Breaking down food Explanation: Nutrients are necessary for break down the food and supply energy to the organisms and to carry out essential life functions. Important nutrients are Hydrogen, Carbon and Oxygen. Some more important nutrients for plants are : Potassium, Sulphur, Nitrogen, Phosphorous, Calcium and Magnesium.
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उत्तर :
व्याख्या :
90 D in RA means 90 Degrees in Right Angle. It is a logic question which is to be eloborated. Some more of its kind are: 1. 52 W in a Y - 52 Weeks in a Year 2. 7 C in a R - 7 Colours in a Rainbow 3. 9 P in SS 4. 5 C in an OF 5. 12 S of the Z
प्र: What is the value of 62 tens? 1773 05b5cc67be4d2b4197774c1b8
5b5cc67be4d2b4197774c1b8- 16false
- 2620true
- 362false
- 42false
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उत्तर : 2. "620"
व्याख्या :
Answer: B) 620 Explanation: Here in the question it is asked that 62 tens, which implies ten times of 62. => 62 x 10 = 620. Hence, the value of 62 tens = 620.
प्र: Unlike Mitosis, Meiosis results in the formation of 1773 05b5cc6abe4d2b4197774cfa8
5b5cc6abe4d2b4197774cfa8- 12N daughter cellsfalse
- 2Haploid cellstrue
- 3body cellsfalse
- 4Diploid cellsfalse
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उत्तर : 2. "Haploid cells"
व्याख्या :
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.
प्र: What occurs once in a minute twice in a moment? 1773 05b5cc67ee4d2b4197774c244
5b5cc67ee4d2b4197774c244- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
Here the letter 'M' appears once in Minute and twice in a MoMent.
प्र: Which unit of valuation is known as paper gold? 1772 05b5cc69be4d2b4197774c811
5b5cc69be4d2b4197774c811- 1SDRtrue
- 2Eurodollarfalse
- 3GDRfalse
- 4Petrodollarfalse
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उत्तर : 1. "SDR"
व्याख्या :
Answer: A) SDR Explanation: SDR means Special Drawing Rights. SDRs are a measure of a country's reserve assets with IMF and, whereas not 'money' in the strict sense, have several characteristics of money as interest-bearing assets, store of value, and means of settling indebtedness. International financing instrument created in 1970 by the International Monetary Fund (IMF) to coincide with the disfavor of the US dollar as the principal currency of the world trade. Also called paper gold, an SDR is neither paper nor gold but an accounting entry. It is not backed by any currency or precious metal and is used only among governments and IMF for balance Of payments settlements.
प्र: Which planet has the lowest density? 1771 05b5cc69de4d2b4197774c933
5b5cc69de4d2b4197774c933- 1Earthfalse
- 2Jupiterfalse
- 3Saturntrue
- 4Neptunefalse
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उत्तर : 3. "Saturn"
व्याख्या :
Answer: C) Saturn Explanation: Saturn, the solar system's second largest planet that takes the prize for least dense. It's less dense than water, which has led many people to postulate that it would float. However, even if it somehow found its way to a body of water large and deep enough to contain it, Saturn would break apart and its rocky core would sink.
प्र: Metals are good conductors of electricity because 1771 05b5cc6a5e4d2b4197774ccd6
5b5cc6a5e4d2b4197774ccd6- 1The atoms are lightly packedfalse
- 2They contain free electronstrue
- 3They have high melting pointfalse
- 4All the abovefalse
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उत्तर : 2. "They contain free electrons"
व्याख्या :
Answer: B) They contain free electrons Explanation: Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points. The free electrons in metals can move through the metal, allowing metals to conduct electricity. Because the electrons in the atom's higher energy levels can separate from the atoms easily, they can be pulled out with very little energy. Because the molecular structure of the metal is such that 'free electrons' are free to move, thus being categorized as electrically conductive. For example, copper is used for electrical wiring because it is a good conductor of electricity.

