IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: What is the interest rate per annum, if a sum of money invested at compound interest amount to Rs. 2400 in 3 years and in 4 years to Rs. 2,520? 1843 05b5cc68be4d2b4197774c38a
5b5cc68be4d2b4197774c38a- 13.5%false
- 24%false
- 35%true
- 46.5%false
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उत्तर : 3. "5%"
व्याख्या :
Answer: C) 5% Explanation: Let 'R%' be the rate of interest From the given data, 25202400 = 1 + R10041 + R1003⇒1 + R100 = 6360⇒R = 5 Hence, the rate of interest R = 5% per annum.
प्र: Chola Empire was divided into ____ 1843 05b5cc6cee4d2b4197774e2b9
5b5cc6cee4d2b4197774e2b9- 1Mandalams, Nadu, Avanti & Kurramfalse
- 2Mandalams, Nadu, Malkhand & Kurramfalse
- 3Avanti, Nadu, Malkhand & Kurramfalse
- 4Mandalams, Nadu,Kurram & Valanadutrue
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उत्तर : 4. "Mandalams, Nadu,Kurram & Valanadu"
व्याख्या :
Answer: D) Mandalams, Nadu,Kurram & Valanadu Explanation:
प्र: There is a clock which shows false timing ie it shows 20 minutes less for each 1 hour. If the clock shows 12 noon now how many minutes will be lost when it shows 2 pm ? 1841 05b5cc728e4d2b4197774f71e
5b5cc728e4d2b4197774f71e- 136 minutesfalse
- 248 minutesfalse
- 335 minutesfalse
- 460 minutestrue
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उत्तर : 4. "60 minutes"
व्याख्या :
Answer: D) 60 minutes Explanation: For 1 hour, 20 minutes is slower, then for 06 miuntes - 2 minutes is slower30 minutes - 10 minutesActual time | false time 12 12 01 PM 12:40 PM (20 minutes slower) 02 PM 01:20 PM 03 PM 02:00 PM So, when actual time is 3pm, the false time is 2 pm.So, it loses 60 minutes when it shows 2 pm.
प्र: Arjuna award is given for 1840 05b5cc675e4d2b4197774c101
5b5cc675e4d2b4197774c101- 1Excellence in sportstrue
- 2Excellent service during emergencyfalse
- 3Bravery in the battle fieldfalse
- 4Excellence in archeryfalse
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उत्तर : 1. "Excellence in sports"
व्याख्या :
Answer: A) Excellence in sports Explanation: The Arjuna Awards are given by the Ministry of Youth Affairs and Sports, Government of India to recognize outstanding achievement in sports. Started in 1961, the award carries a cash prize of ₹ 500,000, a bronze statue of Arjuna and a scroll.
प्र: If the HCF of 210 and 55 is expressible in the form of 210 x 5 + 55P, then value of P = ? 1840 05b5cc6c0e4d2b4197774dacb
5b5cc6c0e4d2b4197774dacb- 1-23false
- 227false
- 316false
- 4-19true
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उत्तर : 4. "-19"
व्याख्या :
Answer: D) -19 Explanation: HCF of 210 and 55 is 5 Now, 210x5 + 55P = 5 => 1050 + 55P = 5 => 55P = -1045 => P = -1045/55 => P = -19.
प्र: What is the difference in the shares of profit between P and Q in a joint business at the end of one year ? a. P Invested Rs. 80,000 and withdrew Rs. 20,000 after 6 months. b. Q joined four months after the start of business. c. Q's amount was 80% of P's amount during the last six months. 1840 05b5cc70be4d2b4197774f2dc
5b5cc70be4d2b4197774f2dc- 1Only afalse
- 2Only cfalse
- 3Both a & bfalse
- 4Data is not sufficienttrue
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उत्तर : 4. "Data is not sufficient"
व्याख्या :
Answer: D) Data is not sufficient Explanation: a. P's investment = (80000 x 6 + 60000 x 6) = 840000 for 1 month. b & c. Q's investment = 80% of Rs. 60000 for 8 months. = Rs.(48000 x 8) for 1 month = 384000 for 1 month P : Q = 840000 : 384000 = 35 : 16. But, the total profit is not given, so data is inadequate.
प्र: By investing Rs. 1620 in 8% stock, Michael earns Rs. 135. The stock is then quoted at ? 1839 05b5cc723e4d2b4197774f686
5b5cc723e4d2b4197774f686- 1Rs. 145false
- 2Rs. 245.1false
- 3Rs. 96true
- 4Rs. 75false
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उत्तर : 3. "Rs. 96"
व्याख्या :
Answer: C) Rs. 96 Explanation: Michel earns Rs. 135 by investing Rs. 1620To earn Rs. 8 how much he have to invest...? = (8 x 1620)/135 = Rs. 96
प्र: Is C2 Paramagnetic or Diamagnetic? 1839 05b5cc6b3e4d2b4197774d3d7
5b5cc6b3e4d2b4197774d3d7- 1Paramagneticfalse
- 2Diamagnetictrue
- 3Ferromagneticfalse
- 4Can't be determinedfalse
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उत्तर : 2. "Diamagnetic"
व्याख्या :
Answer: B) Diamagnetic Explanation: Paramagnetic Molecules :: If the Electronic configuration of a molecule has any unpaired electrons, then that molecule is said to be Paramagnetic. Diamagnetic Molecules :: If the Electronic configuration of a molecule has only paired or spin paired electrons, then that molecule is said to be Diamagnetic. Here the molecule C2 has all paired electrons in its electronic configuration. So C2 is Diamagnetic. Whereas, B2 molecule has unpaired electrons. So B2 is Paramegnetic.

