IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Mahesh bought 100 kg of rice for Rs. 1040 and sold it at a loss of as much money as he received for 30 kg rice. At what price did he sell the rice? 1455 0

  • 1
    Rs. 7.46/kg
    सही
    गलत
  • 2
    Rs. 8/kg
    सही
    गलत
  • 3
    Rs. 8.74/kg
    सही
    गलत
  • 4
    Rs. 8.56/kg
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 2. "Rs. 8/kg"
व्याख्या :

Answer: B) Rs. 8/kg Explanation: Let the selling price of the rice = Rs.P/kg Now, according to the question, 1040 - 100p = 30p => p = 8/kg   Hence, the selling price of the rice = Rs. 8/kg

प्र: How many Enzymes are there in the Human Body? 1646 0

  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर :
व्याख्या :

There are nearly about 75000 enzymes of 3 classes are there in the human body. They are : 1. Metabolic Enzymes - Enzymes that help to run our Bodies 2. Digestive Enzymes - Enzymes that help in digesting Food 3. Food Enzymes - Enzymes from raw foods that start our Food digestion.

प्र: Who Built The Suez Canal? 1364 0

  • 1
    Theodore Roosevelt
    सही
    गलत
  • 2
    Ferdinand de Lesseps
    सही
    गलत
  • 3
    Robert Mills
    सही
    गलत
  • 4
    James Hoban
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 2. "Ferdinand de Lesseps"
व्याख्या :

Answer: B) Ferdinand de Lesseps Explanation: The Suez Canal in Egypt, is a 101 mile long canal that connects the Mediterranean Sea with the Gulf of Suez, a northern branch of the Red Sea. It was built in 1869 by Ferdinand de Lesseps.

प्र: Which of the following languages is a Slavic Language? 1611 0

  • 1
    Polish
    सही
    गलत
  • 2
    Flemish
    सही
    गलत
  • 3
    Romanian
    सही
    गलत
  • 4
    Gaelic
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 1. "Polish"
व्याख्या :

Answer: A) Polish Explanation: Slavic languages, also called Slavonic languages, a subfamily of the Indo-European family of languages Eastern European ethnic group, commonly associated with Russia, the Baltic States, and other Eastern European countries. peoples of the lands of today's Eastern Europe and Russia have excited curiosity and beckoned visitors. Key to these peoples and cultures are the Slavic languages: 1. Russian, 2. Ukrainian, 3. Polish, 4. Czech, and 5. Bosnian/Croatian/Serbian.   Flemish is the language of many Belgians. Romanians are more Hungarian or Balkans-affiliated than Russian. Gaelic is the language of the Celts (Scotland/Ireland).

प्र: Is C2 Paramagnetic or Diamagnetic? 1683 0

  • 1
    Paramagnetic
    सही
    गलत
  • 2
    Diamagnetic
    सही
    गलत
  • 3
    Ferromagnetic
    सही
    गलत
  • 4
    Can't be determined
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

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.

प्र: Diameter of a Ping Pong Ball? 1890 0

  • 1
    37 mm
    सही
    गलत
  • 2
    38 mm
    सही
    गलत
  • 3
    40 mm
    सही
    गलत
  • 4
    42 mm
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 3. "40 mm"
व्याख्या :

Answer: C) 40 mm Explanation: The ball with which Table Tennis is played is called Ping Pong Ball. According to the International rules, the diameter of the ping pong ball must be not less than 39.5 millimeters and not greater than 40.5  millimeters having a mass of 2.7 grams.

प्र: 9 girls working 7 hours a day can complete a piece of work in 15 day. In how many days can 6 girls working for 9 hours a day, complete the same piece of work? 1449 0

  • 1
    35/4 days
    सही
    गलत
  • 2
    17.5 days
    सही
    गलत
  • 3
    19 3/4 days
    सही
    गलत
  • 4
    37/3 days
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 2. "17.5 days"
व्याख्या :

Answer: B) 17.5 days Explanation: Let the number of days be 'p'  As the work is same, we know that M1 x D1 x H1 = M2 x D2 x H2 Where M = Men, D = Days, H = Hours per day  Here M1 = 9, D1 = 15, H1 = 7  M2 = 6, D2 = p, H2 = 9  => 9 x 15 x 7 = 6 x p x 9  => p = 35/2 = 17.5 days.

प्र: A water tank in a village is normally filled in 8 hours but takes 2 hours longer to fill because of a leak in its bottom. If the tank is full, in how many hrs will the leak empty it ? 2046 0

  • 1
    34 hrs
    सही
    गलत
  • 2
    36 hrs
    सही
    गलत
  • 3
    38 hrs
    सही
    गलत
  • 4
    40 hrs
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 4. "40 hrs"
व्याख्या :

Answer: D) 40 hrs Explanation: The time taken by the leak to empty the tank = 18 - 110 = 5 - 440 = 140 Therefore, the leak empties the tank in 40 hours.

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई