West Bengal police (General Science Chemistry)
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1) The gas used in a refrigerator is
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2) A mobile phone charger is
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3) Sir C.V. Raman was awarded Nobel Prize for his work
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4) Of the following the one representing a physical change is the :
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5) Ohm’s law defines
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6) The best conductor of electricity is :
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7) We observe objects around us due to :
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8) Which one of the following group of gasses contribute to the “Green House effect” ?
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9) The most stable form of carbon is
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10) X-rays are
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11) Bronze is an alloy of copper and :
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12) Lightning can even burn a tree because it contains tremendous amount of :
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13) Rise of mercury in a barometer indicates :
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14) The absolute zero, i.e., temperature below which is not achievable, is about
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15) Rainbows are produced when sunlight
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16) The wavelength of X-rays is of the order of :
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17) The approximate velocity of light per second is :
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18) One horse power is equal to :
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