IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Cosmetic powders are prepared from 2024 0

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    Talc
    सही
    गलत
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    Serpentine
    सही
    गलत
  • 3
    Asbestos
    सही
    गलत
  • 4
    Gypsum
    सही
    गलत
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उत्तर : 1. "Talc"
व्याख्या :

Answer: A) Talc Explanation: Cosmetic powders are prepared from Talc. Face powder is a cosmetic powder applied to the face to set a foundation after application. It can also be reapplied throughout the day to minimize shininess caused by oily skin. There is translucent sheer powder, and there is pigmented powder.

प्र: At what time between 2 and 3 O'clock, the hands of a clock coincide ? 2023 0

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    1 10/11 minutes past 2
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    गलत
  • 2
    1 10/11 minutes past 3
    सही
    गलत
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    1 11/10 minutes past 3
    सही
    गलत
  • 4
    11 10/11 minutes past 2
    सही
    गलत
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उत्तर : 1. "1 10/11 minutes past 2"
व्याख्या :

Answer: A) 1 10/11 minutes past 2 Explanation: Since, in one hour, two hands of a clock coincide only once, so, there will be value.Required time T = 211H×30 + Ao minutes past H.Here H - initial position of hour hand = 2 (since 2 O'clock)A° = Required angle = 0° (Since it coincides)   T = 2112×30 + 0o minutes past 2    => 11011 minutes past 2

प्र: 28 Men and 52 women working together completes a work in 22.5 days. 35 men and 65 women working together on same work will complete it in how many days? 2021 0

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    16
    सही
    गलत
  • 2
    18
    सही
    गलत
  • 3
    19
    सही
    गलत
  • 4
    21
    सही
    गलत
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उत्तर : 2. "18"
व्याख्या :

Answer: B) 18 Explanation: Clearly total persons are increased in  28/35 :: 52/65 = 4:5. As time is inversely proportional to men, so total time will decrease in the ratio 5:4. Hence, 22.5 x 4/5 = 18 days.

प्र: How many Indian states share border with Myanmar  ? 2019 0

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    6
    सही
    गलत
  • 2
    7
    सही
    गलत
  • 3
    3
    सही
    गलत
  • 4
    4
    सही
    गलत
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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: Pollination by wind is called 2019 0

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    Hydrophily
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    Entomophily
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    गलत
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    Anemophily
    सही
    गलत
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    Zoophily
    सही
    गलत
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उत्तर : 3. "Anemophily"
व्याख्या :

Answer: C) Anemophily Explanation: Pollination by wind is called Anemophily or Wind pollination. The process of the transfer of pollen from one individual plant to another, whereby the pollen is carried by air currents is called Anemophily.   Almost all gymnosperms (Non-flowering plants) are anemophilous, as are many plants in the order Poales, including grasses, sedges and rushes.

प्र: In which year was the Supreme Court of India established? 2018 0

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    1951
    सही
    गलत
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    1949
    सही
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  • 3
    1950
    सही
    गलत
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    1947
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उत्तर : 3. "1950"
व्याख्या :

Answer: C) 1950 Explanation: The Supreme Court of India was established in the year 1950.

प्र: Callous is the opposite of 2018 0

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    emotionally hardened
    सही
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    insensitive
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    sympathetic
    सही
    गलत
  • 4
    Unkind
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उत्तर : 3. "sympathetic"
व्याख्या :

Answer: C) sympathetic Explanation: A callous person is insensitive or emotionally hardened.   Hence, Callous is the opposite of Sympathetic, kind hearted, sensitive, nice,...

प्र: A house owner wants to get his house painted. He is told that this would require 45 kg of paint allowing 6% wasting. And if the paint is available in 4 kg tins only, the number of tins required for painting the house is ? 2017 0

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    12
    सही
    गलत
  • 2
    13
    सही
    गलत
  • 3
    11
    सही
    गलत
  • 4
    10
    सही
    गलत
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उत्तर : 1. "12"
व्याख्या :

Answer: A) 12 Explanation: Given 45 kg for painting  And 6% 0f 45 for wasting => 6x45/100 = 2.7 kg Now total paint required = 45+2.7 = 47.7 kgs But tins are available in only 4kgs Then, no. of tins req = 47.7/4 = 11.4 => 12 tins

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