Basic Science Practice Question and Answer
8 Q: The average salinity of sea water is
2280 05edefa608c4c964f73d37fc0
5edefa608c4c964f73d37fc0- 12%false
- 23%false
- 33.5%true
- 42.5%false
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Answer : 3. "3.5%"
Explanation :
The average salinity of sea water is 3.5% or 35 parts per thousand. In other words, for every 1 litre of sea water there is 35 grams of dissolved salts (NaCl) .
Q: What is the coupling of primary and secondary coils in a transformer?
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5ef4495d2d6fc772f50b8ceb- 1Electricalfalse
- 2Mechanicalfalse
- 3Magnetictrue
- 4All thesefalse
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Answer : 3. "Magnetic"
Explanation :
The secondary coil is also generating a magnetic field that is growing and shrinking just like the field in the primary coil. This coupling of magnetic energy between these two coils is called mutual induction.
Q: Potato canker has black canker and black pan / colloid factor?
2279 0604ddf1aa01bc447899e2174
604ddf1aa01bc447899e2174- 1two fungifalse
- 2A fungus and a bacteriumfalse
- 3a fungustrue
- 4A fungus and a virusfalse
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Answer : 3. "a fungus"
Q: Rust on iron?
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5f9101807793eb35d72c610c- 1ferric oxidefalse
- 2Hydrated ferrous and ferric oxidefalse
- 3Alkali ferrous and ferric carbonatefalse
- 4Because of all of the abovetrue
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Answer : 4. "Because of all of the above"
Q: Embryos of Tritium aestivum have a chromosome number?
2262 0604de8a0e147c16b2869ac67
604de8a0e147c16b2869ac67- 144false
- 263true
- 365false
- 467false
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Answer : 2. "63"
Q: capacitor is a of small size but high capacity?
2256 15ef44ae3f2ebd073795bbd97
5ef44ae3f2ebd073795bbd97- 1mica capacitortrue
- 2electrolytic capacitorsfalse
- 3Sirasic capacitorfalse
- 4Paper capacitorfalse
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Answer : 1. "mica capacitor"
Q: An aquatic plant was introduced to the US to remove pollution in Indian aquatic bodies as a troublesome weed. what is its name?
2245 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: Which of the following is not a natural polymer?
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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.