IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: How many Indian states share border with Myanmar  ? 2020 0

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    6
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    7
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    3
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    4
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उत्तर : 4. "4"
व्याख्या :

Answer: D) 4 Explanation: The four northeast Indian states share 1,643-km border with Myanmar – Arunachal Pradesh, Nagaland, Mizoram and Manipur. It is in news recently, because the Indian Government has set up an expert committee to examine the rules which allow free movement of Indian and Myanmarese citizens within 16 kms of the border, but are exploited by militants for smuggling arms, drugs, and fake Indian currency. The committee will be headed by the special secretary (Internal Security) in the Ministry of Home Affairs. The committee will give its report for uniform and effective implementation of free movement regime within 3 months. It will also prepare standard operating procedures common for all the four states so that militants, criminals and contraband are filtered at the border without causing inconvenience to genuine people.

प्र: Let K and L be events on the same sample space, with P (K) = 0.8 and P (B) = 0.6. Are these two events are disjoint ? 1676 0

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    B) = 0.6. Are these two events are disjoint ? A)
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    = 0.6. Are these two events are disjoint ? A) TRUE B) FALSE Answer & Explanation Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P(
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उत्तर : 2. "= 0.6. Are these two events are disjoint ? A) TRUE B) FALSE Answer & Explanation Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P("
व्याख्या :

Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P(A) + P(B) - P(AꓵB). An event is disjoint if P(A ꓵ B) = 0. If K and L are disjoint P(K ꓴ L) = 0.8 + 0.6 = 1.4 And Since probability cannot be greater than 1, these two mentioned events cannot be disjoint.

प्र: A fair six-sided die is rolled twice. What is the probability of getting 4 on the first roll and not getting 6 on the second roll ? 1949 0

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    1/36
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    5/36
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    1/12
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  • 4
    1/9
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उत्तर : 2. "5/36"
व्याख्या :

Answer: B) 5/36 Explanation: The two events mentioned are independent. The first roll of the die is independent of the second roll. Therefore the probabilities can be directly multiplied. P(getting first 4) = 1/6 P(no second 6) = 5/6 Therefore P(getting first 4 and no second 6) = 1/6 x 5/6 = 5/36

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उत्तर : 3. "Neither A nor B follows"
व्याख्या :

Answer: C) Neither A nor B follows Explanation: There is no indication that Indian scientists are incapable of developing enzymes. There could be any number of reasons why Indian scientists used Russian enzymes. So conclusion A does not follow. In addition, cost is not discussed in the passage at all. There is no mention of a correlation between cost and extraction of proteins. Thus, conclusion B does not follow either.

प्र: Joel introduces Mary as the daughter of the only son of my father’s wife. How is Joel related to Mary ? 3289 0

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    Daughter
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    Brother
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    Son
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    Father
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उत्तर : 4. "Father"
व्याख्या :

Answer: D) Father Explanation: Resolving from the last , In the view of joel,My father’s wife – motherOnly son of mother – himself i.e. joelDaughter of john– daughter. So Joel is Father of Mary.

प्र: Find out which part of a sentence has an error and mark the answer corresponding to the appropriate letter (A, B, C). If a sentence is free from errors, mark (D) as the answer. He flew( 3903 0

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    / over extensively(
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    C). If a sentence is free from errors, mark (D) as the answer. He flew(A) / over extensively(B)
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    . If a sentence is free from errors, mark (
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    as the answer. He flew(A) / over extensively(B) / the pacific last winter(C) / No error(D)
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उत्तर : 2. "C). If a sentence is free from errors, mark (D) as the answer. He flew(A) / over extensively(B)"
व्याख्या :

Answer: B) B Explanation: 'Extensively' is describing the verb 'flew' and should be placed after the verb and thus the correct phrase should be 'extensively over'. The error is in the second part of the sentence.

प्र: Which type of forests occupies the highest percentage of area in India  ? 1778 2

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    Savanna & desert vegetation
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    Tropical deciduous
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    Tropical Rainforests
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    Equatorial evergreen
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उत्तर : 2. "Tropical deciduous"
व्याख्या :

Answer: B) Tropical deciduous Explanation: Tropical Deciduous Forests: They are also called the “Monsoon forests”. They grow in the areas with annual rainfall of 70-200 cm. Sandal wood, Shisam, Mahua, Sal, Teak and Bamboo are important species of trees. Moist deciduous and the dry deciduous forests are two major categories of these forests.

प्र: Majid Gyre is a feature of which of the following Oceans  ? 2671 0

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    Indian Ocean
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    Pacific Ocean
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    Atlantic Ocean
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    Arctic Ocean
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उत्तर : 1. "Indian Ocean"
व्याख्या :

Answer: A) Indian Ocean Explanation: The Indian Ocean consists of one gyre, the Indian Ocean (Majid) Gyre, which exists mostly in the Southern Hemisphere. It is named after Ahmad Bin Majid, the 15th-century Arab mariner. Following shows the Oceans and their respective Gyres  Indian Ocean            -        Majid Gyre North Atlantic Ocean   -       Columbus Gyre South Atlantic Ocean  -       Prince Henry Gyre North Pacific Ocean     -      Turtle Gyre South Pacific Ocean    -       Heyerdahl Gyre

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