IIT JEE Practice Question and Answer

Q: How many even numbers are there in the following sequence of numbers which are immediately followed by an odd number as well as immediately preceded by an even number? 8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1 1978 0

  • 1
    2
    Correct
    Wrong
  • 2
    3
    Correct
    Wrong
  • 3
    4
    Correct
    Wrong
  • 4
    5
    Correct
    Wrong
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Answer : 3. "4"
Explanation :

Answer: C) 4 Explanation: We have to find out even number - even number - odd number sequence.  8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1  There are four such such even numbers: 6,8,2 and 8.

Q: When referring to student loans what is a grace period? 1978 0

  • 1
    6 months
    Correct
    Wrong
  • 2
    12 months
    Correct
    Wrong
  • 3
    18 months
    Correct
    Wrong
  • 4
    24 months
    Correct
    Wrong
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Answer : 1. "6 months"
Explanation :

Answer: A) 6 months Explanation: 6 months after graduating or quitting school when you have to start paying back the loans.   A grace period is one term that’s provided for student loans that allow you to delay payments up to a certain length of time, without penalty. During a grace period no late charges would apply, and the loan would not risk falling into default for missed payments. The grace period allows you time to find financial stability prior to having to make payments on your student loans.   Many students use student loans to help pay for their college expenses, including tuition, books, room and board, and other living expenses. Students are expected to repay these loans when they graduate.

Q: Which country shares the longest border with China? 1978 0

  • 1
    India
    Correct
    Wrong
  • 2
    Russia
    Correct
    Wrong
  • 3
    Mongolia
    Correct
    Wrong
  • 4
    Kazakhstan
    Correct
    Wrong
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Answer : 3. "Mongolia"
Explanation :

Answer: C) Mongolia Explanation: China shares land borders with 14 different countries, the longest being with Mongolia followed by Russia and then India.

Q: Why is Golden Rice pale yellow in color? 1977 0

  • 1
    Rich in Beta-Carotene
    Correct
    Wrong
  • 2
    Rich in Phycobilins
    Correct
    Wrong
  • 3
    Rich in Chlorophyll
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "Rich in Beta-Carotene"
Explanation :

Answer: A) Rich in Beta-Carotene Explanation: Golden Rice (Oryza sativa) denotes a genetically modified rice capable of biosynthesizing and accumulating β-carotene (provitamin A) in the endosperm, yielding a characteristic yellow color in the polished grains. Golden rice was developed to help cope with vitamin A deficiency, a problem that prevails in developing countries, affecting millions (Underwood, 2000; UNICEF, 2000). Vitamin A deficiency causes mortality and growth retardation in children and frequently impairs vision, leading to blindness. It also contributes indirectly to anemia by interfering with iron bioavailability.   The endosperm of Golden Rice (Oryza sativa) is yellow due to the accumulation of β-carotene (provitamin A) and xanthophylls. The product of the two carotenoid biosynthesis transgenes used in Golden Rice results in Pale Yellow color.

Q: The sides of a right-angled triangle are 12 cm, 16 cm, 20 cm respectively. A new right angle Δ is made by joining the midpoints of all the sides. This process continues for infinite then calculate the sum of the areas of all the triangles so made. 1976 0

  • 1
    312 sq.cm
    Correct
    Wrong
  • 2
    128 sq.cm
    Correct
    Wrong
  • 3
    412 sq.cm
    Correct
    Wrong
  • 4
    246 sq.cm
    Correct
    Wrong
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Answer : 2. "128 sq.cm"
Explanation :

Answer: B) 128 sq.cm Explanation: Area =    = 96   Sum of Area =

Q: A man can row upstream at 16 km/hr and downstream at 24 km/hr. Find the speed of the current. 1975 0

  • 1
    4 kmph
    Correct
    Wrong
  • 2
    6 kmph
    Correct
    Wrong
  • 3
    5 kmph
    Correct
    Wrong
  • 4
    3 kmph
    Correct
    Wrong
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Answer : 1. "4 kmph"
Explanation :

Answer: A) 4 kmph Explanation: Speed of the current = 24-16/2 = 8/2 = 4 km/hr.

Q: Moti Masjid in Red fort was constructed by 1974 0

  • 1
    Humayun
    Correct
    Wrong
  • 2
    Aurangzeb
    Correct
    Wrong
  • 3
    Akbar
    Correct
    Wrong
  • 4
    Jahangir
    Correct
    Wrong
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Answer : 2. "Aurangzeb"
Explanation :

Answer: B) Aurangzeb Explanation: Moti Masjid was built by the Mughal emperor Aurangzeb from 1659-1660. The Moti Masjid is a white marble mosque inside the Red Fort complex in Delhi, India.

Q: Soil erosion can be prevented by 1972 0

  • 1
    Removal of vegetation
    Correct
    Wrong
  • 2
    Overgrazing
    Correct
    Wrong
  • 3
    Afforestation
    Correct
    Wrong
  • 4
    Increasing bird population
    Correct
    Wrong
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Answer : 3. "Afforestation"
Explanation :

Answer: C) Afforestation Explanation: The four most common soil erosion prevention methods are vegetation, geotextiles, mulch, and retaining walls. By planting grass in areas of concentrated water flow, farmers can prevent much of the soil erosion that results from runoff, as the grass stabilizes the soil while still providing an outlet for drainage. Preventing soil erosion is critical in protecting your property and exposed soil, whether from wind, weather, running water, and even the after-effects of the forest fire.

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