IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Jaduguda mines are famous for 2426 05b5cc6a8e4d2b4197774ce9a
5b5cc6a8e4d2b4197774ce9a- 1mica depositsfalse
- 2uranium depositstrue
- 3gold depositsfalse
- 4iron orefalse
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उत्तर : 2. "uranium deposits"
व्याख्या :
Answer: B) uranium deposits Explanation: The Jaduguda Mine also known as Jadugoda or Jadugora is a Uranium mine in Jaduguda village in the Purbi Singhbhum district of the Indian state of Jharkhand.
प्र: Is water a Pure substance? 1088 05b5cc6a8e4d2b4197774ce9f
5b5cc6a8e4d2b4197774ce9f- 1TRUEtrue
- 2FALSE Answer & Explanation Answer:false
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उत्तर : 1. "TRUE"
व्याख्या :
Answer: A) TRUE Explanation: True, Water is a Pure substance and not a mixture. We know that, A mixture is when two or more substances combine physically together. You can find that the mixture retains the properties of the original components. In water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that has properties different from hydrogen alone or oxygen alone. Therefore, water is not a mixture; it is a compound and it is pure.
प्र: Which statement best describes an igneous intrusion? 1522 05b5cc6a8e4d2b4197774cea2
5b5cc6a8e4d2b4197774cea2- 1Igneous intrusion for when ice crystals splash into lavafalse
- 2Magma is injected into surrounding rock forming an igneous intrusivetrue
- 3Magma is exported to an open area and forms ironfalse
- 4Magma explodes to the surface and forms a smooth outer layer of rockfalse
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उत्तर : 2. "Magma is injected into surrounding rock forming an igneous intrusive"
व्याख्या :
Answer: B) Magma is injected into surrounding rock forming an igneous intrusive Explanation: Magma is injected into surrounding rock forming an igneous intrusive. Actually it is a plutonic formation in which magma present beneath Earth surface deforms the shape of rocks present above it
प्र: A man can row against the current three fourth of a kilometer in 15 min and returns same distance in 10 min, then ratio of his speed to that of current? 2763 05b5cc6a8e4d2b4197774ce95
5b5cc6a8e4d2b4197774ce95- 15:1true
- 23:1false
- 34:1false
- 42:1false
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उत्तर : 1. "5:1"
व्याख्या :
Answer: A) 5:1 Explanation: Let the speed of the man in still water = p kmph Speed of the current = s kmph Now, according to the questions (p + s) x 10 = (p - s) x 15 2p + 2s = 3p - 3s => p : s = 5 : 1 Hence, ratio of his speed to that of current = 5:1.
प्र: Which of the following pairs is mismatched? 2628 05b5cc6a8e4d2b4197774ce8b
5b5cc6a8e4d2b4197774ce8b- 1Pila globosa - pearltrue
- 2Kenia lacca - lacfalse
- 3Apis indica - honeyfalse
- 4Bombyx mori - silkfalse
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उत्तर : 1. "Pila globosa - pearl"
व्याख्या :
Answer: A) Pila globosa - pearl Explanation: Pinctada vulgaris is a bivalve from which pearl is obtained.
प्र: Which of the following is not a polymer? 2173 05b5cc6a8e4d2b4197774ce90
5b5cc6a8e4d2b4197774ce90- 1DNAfalse
- 2Glucosetrue
- 3Starchfalse
- 4Cellulosefalse
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उत्तर : 2. "Glucose"
व्याख्या :
Answer: B) Glucose Explanation: Since A polymer is a large molecule, or macromolecule, composed of many repeated subunits. Glucose is not a polymer.
प्र: Which of the following is generally true about the stratosphere? 2209 05b5cc6a8e4d2b4197774ce80
5b5cc6a8e4d2b4197774ce80- 1It is very drytrue
- 2It is very moistfalse
- 3The dryness level varies with the seasonfalse
- 4The dryness level varies with the moon cyclefalse
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उत्तर : 1. "It is very dry"
व्याख्या :
Answer: A) It is very dry Explanation: The stratosphere layer of the atmosphere is very dry.
प्र: abcdefghijklmnopqrstuvwxyz Riddle What sentence contains all abcdefghijklmnopqrstuvwxyz? 1293 05b5cc6a8e4d2b4197774ce85
5b5cc6a8e4d2b4197774ce85- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
The Quick Brown Fox Jumped Over The Lazy Dog is the sentence which contains all 26 alphabets i.e, from a to z.

