Basic Science Practice Question and Answer
8 Q: In the nitrogen cycle, soil nitrates are converted into free nitrogen by whom?
1958 05f6046ec80a26b7dab001452
5f6046ec80a26b7dab001452- 1nitrifying bacteriafalse
- 2denitrifying bacteriatrue
- 3ammonifying bacteriafalse
- 4None of thesefalse
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Answer : 2. "denitrifying bacteria"
Q: Battery's electrode?
1950 05ef44cbcf2ebd073795bbffb
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 number of ossicles in the ear of mammals is
1909 064424f9b0d865d025e66385d
64424f9b0d865d025e66385d- 12false
- 23true
- 34false
- 45false
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Answer : 2. "3"
Explanation :
The mammalian middle ear contains three ossicles, which move the vibrations of the eardrum into waves in the liquid and membrane of the inward ear. There are three ossicles in every ear : Malleus, Incus, Stapes. As we have a couple of ears, so altogether there are 6 ossicles, or 3 sets of ossicles.
Q: What is the scientific name of Banyan Tree?
1898 060ab93711615d94344796820
60ab93711615d94344796820- 1Mangifera indicafalse
- 2Ficus benghalensistrue
- 3Azadirachta indicafalse
- 4Shorea robustafalse
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Answer : 2. "Ficus benghalensis "
Q: Vegetable oils are converted into ghee?
1894 05f91021d7793eb35d72c61b3
5f91021d7793eb35d72c61b3- 1Heat treatmentfalse
- 2hydrogenationtrue
- 3oxygenfalse
- 4by enzymesfalse
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Answer : 2. "hydrogenation"
Q: An aquatic plant was introduced to the US to remove pollution in Indian aquatic bodies as a troublesome weed. what is its name?
1888 05f6046a209624c19c5c13610
5f6046a209624c19c5c13610- 1hawthornfalse
- 2Egiolpstrue
- 3hyacinthfalse
- 4Pistiafalse
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Answer : 2. "Egiolps"
Explanation :
So the correct answer is 'Eichhornia crassipes' An aquatic plant introduced from America to check pollution turned out to be a troublesome weed in Indian water bodies.
Q: What type of waves are there in Radar?
1884 05f912f099e18f97b7040eacf
5f912f099e18f97b7040eacf- 1electric wavesfalse
- 2electromagnetic wavestrue
- 3Sound wavesfalse
- 4None of the abovefalse
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Answer : 2. "electromagnetic waves"
Q: Which of the following is not a natural polymer?
1879 05f61ca5b8561dc09cc77ffcc
5f61ca5b8561dc09cc77ffcc- 1Woolfalse
- 2Leatherfalse
- 3Nylontrue
- 4Silkfalse
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Answer : 3. "Nylon"
Explanation :
The correct answer is the Glyptal. The term "natural polymers" refers to compounds that are produced naturally. Glyptal is a synthetic polymer and does not exist in nature. The polymer substance formed from glycerol and phthalic acid is known commercially as glyptal.