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प्र: In a daily morning walk three persons step off together. their steps measure 75 cm, 80 cm and 85 cm respectively. What is the minimum distance each should walk so that thay can cover the distance in complete steps  ? 2174 0

  • 1
    222 m 44 cm
    सही
    गलत
  • 2
    204 m
    सही
    गलत
  • 3
    201 m 21 cm
    सही
    गलत
  • 4
    208 m
    सही
    गलत
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उत्तर : 2. "204 m"
व्याख्या :

Answer: B) 204 m Explanation: To find the minimum distance, we have to get the LCM of 75, 80, 85 Now, LCM of 75, 80, 85 = 5 x 15 x 16 x 17 = 20400 Hence, the minimum distance each should walk so that thay can cover the distance in complete steps = 20400 cms = 20400/100 = 204 mts.

प्र: Sources of geothermal power are 2174 0

  • 1
    water
    सही
    गलत
  • 2
    earth's heat
    सही
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  • 3
    Both A & B
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    गलत
  • 4
    None of the above
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उत्तर : 3. "Both A & B"
व्याख्या :

Answer: C) Both A & B Explanation: Geothermal power plants are used in order to generate electricity by the use of geothermal energy (the Earth's internal thermal energy). They essentially work the same as a coal or nuclear power plant, the main difference being the heat source. Geothermal power plants use hydrothermal resources that have both water (hydro) and heat (thermal). Geothermal power plants require high-temperature (300°F to 700°F) hydrothermal resources that come from either dry steam wells or from hot water wells.

प्र: What will come in place of the question mark (?) in the following number series  ? 12, 24, 26.5, 79.5, ?, 330 2173 0

  • 1
    211
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    गलत
  • 2
    101.5
    सही
    गलत
  • 3
    82.5
    सही
    गलत
  • 4
    99
    सही
    गलत
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उत्तर : 3. "82.5"
व्याख्या :

Answer: C) 82.5 Explanation: The given series    12   24   26.5   79.5   ?   330 follows a pattern that,   12 x 2 = 24   24 + 2.5 = 26.5   26.5 x 3 = 79.5   79.5 + 3 = 82.5   82.5 x 4 = 330   Hence, the missing number is 82.5

प्र: Find the odd one out of the following words ? 2173 0

  • 1
    cruise
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  • 2
    crusade
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    गलत
  • 3
    expedition
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    गलत
  • 4
    campaign
    सही
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उत्तर : 1. "cruise"
व्याख्या :

Answer: A) cruise Explanation: Cruise = a sea voyage for pleasure. All other words are related to ‘journey on land, sea with an aim’.

प्र: If the price of diesel increases by 25% and Karthik intends to spend only an additional 15% on diesel, by how much % will he reduce the quantity of diesel purchased ? 2173 0

  • 1
    6.67 %
    सही
    गलत
  • 2
    8 %
    सही
    गलत
  • 3
    7.41 %
    सही
    गलत
  • 4
    9 %
    सही
    गलत
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उत्तर : 2. "8 %"
व्याख्या :

Answer: B) 8 % Explanation: Let the price of 1 litre of diesel be Rs.x and let Karthik initially buy 'y' litres of diesel. Therefore, he would have spent Rs. xy on diesel. When the price of diesel increases by 25%, the new price per litre of diesel is 1.25x. Karthik intends to increase the amount he spends on diesel by 15%.i.e., he is willing to spend xy + 15% of xy = 1.15xy Let the new quantity of diesel that he can get be 'q'.Then, 1.25x x q = 1.15xyOr q = (1.15/1.25)y = 0.92y. As the new quantity that he can buy is 0.92y, he gets 0.08y lesser than what he used to get earlier. Or a reduction of 8%.

प्र: Which combination of atoms can form a polar covalent bond? 2173 0

  • 1
    H and Br
    सही
    गलत
  • 2
    H and H
    सही
    गलत
  • 3
    Na and Br
    सही
    गलत
  • 4
    N and N
    सही
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उत्तर : 1. "H and Br"
व्याख्या :

Answer: A) H and Br Explanation: Only H and Br form Polar Covalent Bond.   Covalent bonding: Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability. 1. Polar Covalent Bond 2. Nonpolar Covalent Bond   1. Polar Covalent Bond: A Polar Covalent Bond is created when the shared electrons between atoms are not equally shared. This occurs when one atom has a higher electronegativity than the atom it is sharing with. The atom with the higher electronegativity will have a stronger pull for electrons (Similiar to a Tug-O-War game, whoever is stronger usually wins). As a result, the shared electrons will be closer to the atom with the higher electronegativity, making it unequally shared.   2. Nonpolar Covalent Bond: A Nonpolar Covalent Bond is created when atoms share their electrons equally. This usually occurs when two atoms have similar or the same electron affinity. The closer the values of their electron affinity, the stronger the attraction. This occurs in gas molecules; also known as diatomic elements. Nonpolar covalent bonds have a similar concept as polar covalent bonds; the atom with the higher electronegativity will draw away the electron from the weaker one.   Here H and H and N and N form Non-polar covalent bonds. Na and Br form the ionic bond.

प्र: India's longest cable-bridge inaugurated by PM Modi in which state ? 2172 0

  • 1
    Assam
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  • 2
    Telangana
    सही
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  • 3
    Gujarat
    सही
    गलत
  • 4
    Karnataka
    सही
    गलत
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उत्तर : 3. "Gujarat"
व्याख्या :

Answer: C) Gujarat Explanation: PM Modi Inaugurated India's Longest Cable Bridge in Gujarat, a four-lane bridge over the river Narmada in Bharuch. The bridge is 1344 metres long and 22.8 metres wide. It is built by Larsen and Turbo as a part of the Rs. 379 crore project of the National Highway Authority of India.

प्र: What occurs once in a minute twice in a moment? 2172 0

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उत्तर :
व्याख्या :

Here the letter 'M' appears once in Minute and twice in a MoMent.

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