IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Statement: The Chairman stressed the need for making education system more flexible and regretted that the curriculum has not been revised in keeping with the pace of the changes taking place.Course of action:a. Curriculum should be reviewed and revised periodically.b. System of education should be made more flexible. 2129 0

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    Only a follows
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    Only b follows
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    Both a & b follows
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  • 4
    Neither a nor b follows
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उत्तर : 3. "Both a & b follows"
व्याख्या :

Answer: C) Both a & b follows Explanation: Clearly, the situation demands making the education system more flexible and changing it periodically according to the needs of the time. So, both the courses follow.

प्र: Where should a boat compass be mounted? 2129 0

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    near magnet
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    near iron
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    away from electrical wiring
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    All the above
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उत्तर : 3. "away from electrical wiring"
व्याख्या :

Answer: C) away from electrical wiring Explanation: A compass, which is used to assist in navigation, is an instrument that shows magnetic north. You must apply a correction to determine the direction of true north. The ability to steer a boat by a compass is useful if land is out of sight, visibility is reduced, or the boat operator is disoriented.   Mount a boat compass away from iron, magnets, and electrical wiring and equipment.

प्र: Where is the Headquarter of ASEAN (Association of Southeast Asian Nations)? 2128 0

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    Jakarta
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    Beijing
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    Newyork
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    Da Nang
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उत्तर : 1. "Jakarta"
व्याख्या :

Answer: A) Jakarta Explanation: The ASEAN Headquarters is located in Jakarta, Indonesia.   ASEAN is The Association of Southeast Asian Nations is a group of ten Southeast Asian countries. It was formed on 8th August 1967. The 10 countries in ASEAN are Indonesia, Malaysia, Philippines, Singapore, Brunei, Myanmar, Cambodia, Laos, Vietnam and Thailand.   Its main purpose include the acceleration of economic growth, social progress, cultural development among its members, the protection of the peace and stability of the region, and to provide opportunities for member countries to discuss differences peacefully.

प्र: A passenger train covers the distance between station K and L, 40 minutes faster than a goods train. Find this distance between K and L if the average speed of the passenger train is 50 km/h and that of goods train is 30 km/h? 2126 0

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    50 kms
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    48 kms
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    46 kms
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    44 kms
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उत्तर : 1. "50 kms"
व्याख्या :

Answer: A) 50 kms Explanation: Let the distance be 'd' kms. According to the given data, d30 - d50 = 4060 hrs=> 6d = 300=> d = 50 kms.

प्र: A plane is an undefined term because it 2125 0

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    is a flat surface that extends indefinitely in all directions
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    is where other geometric shapes can be constructed
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    is described generally, not using a formal definition
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    can be named using three noncollinear points
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उत्तर : 3. "is described generally, not using a formal definition"
व्याख्या :

Answer: C) is described generally, not using a formal definition Explanation: In geometry, we can define plane as a flat surface with no thickness. The surface extends with no ends. A plane does not have any edges even if we draw it on paper with edges, it does't mean it has edges.   Hence, A plane is an undefined term because it is described generally, not using a formal definition.

प्र: P, Q and R secured 45%, 50% and 60% marks respectively in Biology. M’s marks in Biology is 12.5 more than P’s marks and 4 less than R’s marks. Find out the individual marks of four students.   A. For the students, total marks obtained for Biology is 311.5.B. Total of M’s and P’s marks in Biology is 147.5.C. R has obtained 84 marks. 2124 0

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    Only C
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    Only A & B
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    All are required
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    None of the statements is required
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उत्तर : 4. "None of the statements is required"
व्याख्या :

Answer: D) None of the statements is required Explanation: From the given data, (60 - 45)% = 12.5 + 415% = 16.5=> 100% = ?100% = 16.5 x 100/15 = 110 Hence, P = 45% of 110 = 45x110/100 = 49.5 Q = 50% of 110 = 55R = 60% of 110 = 60 x 110/100 = 66M = 12.5 + 49.5 = 62 or 66 - 4 = 62   Hence, no statement is required to answer.

प्र: Which statement best describes the electronegativity of an element? 2124 0

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    Electronegativity of an atom is it's ability to produce energy while losing an electron.
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    Electronegativity of an atom is it's ability to attract electrons during bond formation.
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    Electronegativity of an atom is it's ability to lose electrons during cation formation.
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    Electronegativity of an atom is it's ability to share electrons during a covalent bond formation.
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उत्तर : 2. "Electronegativity of an atom is it's ability to attract electrons during bond formation."
व्याख्या :

Answer: B) Electronegativity of an atom is it's ability to attract electrons during bond formation. Explanation: Electronegativity, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons (or electron density) towards itself.

प्र: In how many ways the letters of the word NUMERICAL can be arranged so that the consonants always occupy the even places ? 2123 0

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    5!
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    6!
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    4!
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    Can't determine
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उत्तर : 4. "Can't determine"
व्याख्या :

Answer: D) Can't determine Explanation: NUMERICAL has 9 positions in which 2, 4, 6, 8 are even positions. And it contains 5 consonents i.e, N, M, R, C & L. Hence this cannot be done as 5 letters cannot be placed in 4 positions. Therefore, Can't be determined.

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