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प्र: Is water a Pure substance? 1079 0

  • 1
    TRUE
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  • 2
    FALSE Answer & Explanation Answer:
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उत्तर : 1. "TRUE"
व्याख्या :

Answer: A) TRUE Explanation: True, Water is a Pure substance and not a mixture.   We know that, A mixture is when two or more substances combine physically together. You can find that the mixture retains the properties of the original components. In water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that has properties different from hydrogen alone or oxygen alone.   Therefore, water is not a mixture; it is a compound and it is pure.

प्र: 19 friends went to a restaurant for a combined weekend dinner party. 13 of them spent Rs. 79 each on their dinner and the rest spent Rs. 4 more than the average expenditure of all the 19. What was the total money spent by them? 1076 0

  • 1
    Rs. 1398.96
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  • 2
    Rs. 1457.09
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  • 3
    Rs. 1662.35
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  • 4
    Rs. 1536.07
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उत्तर : 4. "Rs. 1536.07"
व्याख्या :

Answer: D) Rs. 1536.07 Explanation: Let average expenditure was Rs. R 13 x 79 + 6x(R + 4) = 19R => R = Rs. 80.84 Total money = 19 x 80.84 = Rs. 1536.07.

प्र: If you had the chance to start your career over again, what would you do differently ? 1059 0

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उत्तर :
व्याख्या :

This depends on several factors. Different Individuals have different answers for it.You can answer as - " I will most likely be involved in a different but still related career path; something to do with the creative side. If I were to start over I would attempt to get myself to specialize in one area as a young man. It’s very interesting to follow one’s interests all at the same time, but you don’t get anywhere very quickly this way. By pursuing lots of interests all at the same time, it takes a long, long time to acquire professional level skills."

प्र: One boat is overtaking another. Which boat must give way? 1051 0

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उत्तर :
व्याख्या :

The boat which is overtaken must give way to the boat which is overtaking.

प्र: Brightness of bulb depends on voltage or current? 1051 0

  • 1
    Current
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  • 2
    Voltage
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  • 3
    Both A & B
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  • 4
    None
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उत्तर : 3. "Both A & B"
व्याख्या :

Answer: C) Both A & B Explanation: Brightness of bulb depends on both voltage and current. The brightness depends on power. Since we know that  Power (P) = Voltage x Current = V I So whether you increase the current or the voltage the brightness will increase.   Example Illustration:  If you connect a long bulb and a round bulb in series, the long bulb glows but the round bulb does not. Both of them have the same current flowing through them (they are in series) but the long bulb has a greater voltage across it because it has more resistance (even though V= IR is not obeyed exactly, voltage drop does depend on the resistance). If you connect a round bulb and a long bulb in parallel, however, it is the round bulb that is brighter because now the voltage across both bulbs is the same but the current is larger through the round bulb (smaller resistance).   Hence, the brightness of a bulb depends on power i.e, both voltage and current.

प्र: 40% of 80? 1048 0

  • 1
    36
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  • 2
    32
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  • 3
    42
    सही
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  • 4
    44
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उत्तर : 2. "32"
व्याख्या :

Answer: B) 32 Explanation: Here 40% of 80 is given as 40100 x 80 = 8 x 4 = 32

प्र: I have three eyes but only one leg. I still close one even if you beg.  What am I? 1044 0

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उत्तर :
व्याख्या :

A traffic light. It has three 'eyes' (the red, orange and green lights) and the leg is the pole holding it up. Many people beg the light to stay green as they’re approaching.

प्र: Find at what time between 9 and 10 o’clock will the hands of a clock be in 180° ? 1037 0

  • 1
    180/14 min past 10
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  • 2
    180/11 min past 9
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  • 3
    148/7 min past 10
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  • 4
    154/11 min past 9
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उत्तर : 2. "180/11 min past 9"
व्याख्या :

Answer: B) 180/11 min past 9 Explanation: At 9 o’clock, the hour hand is at 9 and the minutes hand is at 12, i.e., the two hands are 15 min. spaces apart.So, the minute hand should gain = (30 - 15) minutes = 15 minutes55 minutes will be gained in 60 min.15 minutes spaces will be gained in ((60/55) x 15) min. = 180/11 min.The hands will be in the same straight line but not together i.e.,in 180 degrees at 180/11 min. past 9.

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