Basic Science Practice Question and Answer
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Q: In the nitrogen cycle, soil nitrates are converted into free nitrogen by whom?
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5f6046ec80a26b7dab001452- 1nitrifying bacteriafalse
- 2denitrifying bacteriatrue
- 3ammonifying bacteriafalse
- 4None of thesefalse
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Answer : 2. "denitrifying bacteria"
Q: Select the odd from the following.
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5f8fecfb7793eb35d72718c3- 1J.L .Baird — Televisionfalse
- 2J. Parkinson — Penicillinfalse
- 3James Watt — Steam Enginetrue
- 4A. G. Bell — Telephonefalse
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Answer : 3. "James Watt — Steam Engine "
Q: capacitor is a of small size but high capacity?
1407 15ef44ae3f2ebd073795bbd97
5ef44ae3f2ebd073795bbd97- 1mica capacitortrue
- 2electrolytic capacitorsfalse
- 3Sirasic capacitorfalse
- 4Paper capacitorfalse
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Answer : 1. "mica capacitor"
Q: Battery's electrode?
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5ef44cbcf2ebd073795bbffb- 1must be a semiconductorfalse
- 2Should be the conductor of electricityfalse
- 3Should be a good conductor of electricitytrue
- 4None of thesefalse
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Answer : 3. "Should be a good conductor of electricity"
Q: The main reason why the sky appears blue?
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5f912f5a7793eb35d72d8391- 1Sunlight is bluefalse
- 2Scattering of solar rays by particles of dust etc. present in the atmospheretrue
- 3light reflectionfalse
- 4light refractionfalse
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Answer : 2. "Scattering of solar rays by particles of dust etc. present in the atmosphere"
Q: Which gas is used to purify pond water in cities?
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601401905beea84b8ecebc42- 1Sulfur dioxidefalse
- 2Chlorinetrue
- 3Nitrogenfalse
- 4Ammoniafalse
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Answer : 2. "Chlorine"
Q: What are the units of electrical conductivity?
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6024f177083f2c6596c16ae6- 1Minutesfalse
- 2Dimensionfalse
- 3Speedfalse
- 4Mahotrue
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Answer : 4. "Maho"
Q: Vegetable oils are converted into ghee?
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5f91021d7793eb35d72c61b3- 1Heat treatmentfalse
- 2hydrogenationtrue
- 3oxygenfalse
- 4by enzymesfalse
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Answer : 2. "hydrogenation"
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