Chemistry Practice Question and Answer
8 4 Q:
5edef8088c4c964f73d377df 4 Q:
5feb07d1f33a00432aff075e 4 Q:
5ef430d7bea49d16b47d5818 4 Q:
5ed88dbbb516791f26501eea 4 Q:
5ed63d274bd6e60aba33c8a4 4 Q:
5edefcd28c4c964f73d38693 4 Answer : 1. "a nonpolar molecule with polar bonds"
4 Q:
5ed634c2436d8a49583c72fa
Q: Washing soda is the common name for
2259 15edef8088c4c964f73d377df
5edef8088c4c964f73d377df- 1Calcium carbonatefalse
- 2Sodium carbonatetrue
- 3Calcium bicarbonatefalse
- 4Sodium bicarbonatefalse
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Answer : 2. "Sodium carbonate"
Q: What percentage of carbon is in steel?
2251 05feb07d1f33a00432aff075e
5feb07d1f33a00432aff075e- 13%false
- 24%false
- 32%true
- 45%false
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Answer : 3. "2%"
Q: Who is called the father of modern chemistry?
2234 05ef430d7bea49d16b47d5818
5ef430d7bea49d16b47d5818- 1Daltonfalse
- 2Lavoisiertrue
- 3Mendeleevfalse
- 4None of thesefalse
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Answer : 2. "Lavoisier"
Q: German silver used for making utensils is an alloy of
2205 05ed88dbbb516791f26501eea
5ed88dbbb516791f26501eea- 1copper silver nickelfalse
- 2copper zinc nickeltrue
- 3copper zinc aluminumfalse
- 4copper nickel aluminumfalse
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Answer : 2. "copper zinc nickel "
Q: Milk is a natural
2186 05ed63d274bd6e60aba33c8a4
5ed63d274bd6e60aba33c8a4- 1Solutionfalse
- 2Mixturefalse
- 3Suspensionfalse
- 4Emulsiontrue
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Answer : 4. "Emulsion "
Q: Permanent hardness of water may be removed by the addition of
2181 05edefcd28c4c964f73d38693
5edefcd28c4c964f73d38693- 1sodium carbonatetrue
- 2alumfalse
- 3potassium permanganatefalse
- 4limefalse
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Answer : 1. "sodium carbonate"
Q: The carbon tetrachloride molecule (CCl4) is 2126 05b5cc604e4d2b4197774b4e7
5b5cc604e4d2b4197774b4e7- 1a nonpolar molecule with polar bondstrue
- 2a nonpolar molecule with nonpolar bondsfalse
- 3a polar molecule with polar bondsfalse
- 4a polar molecule with nonploar bondsfalse
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Answer : 1. "a nonpolar molecule with polar bonds"
Explanation :
Answer: A) a nonpolar molecule with polar bonds Explanation: The four bonds of carbon tetrachloride (CCl4) are polar, but the molecule is nonpolar because the bond polarity is cancelled by the symmetric tetrahedral shape. Hence, making the net dipole as zero and molecule as non-polar. When other atoms substitute for some of the Cl atoms, the symmetry is broken and the molecule becomes polar.
Q: The gas used for artificial fruit ripening of green fruit is
2103 05ed634c2436d8a49583c72fa
5ed634c2436d8a49583c72fa- 1Ethanefalse
- 2Ethylenefalse
- 3Methanefalse
- 4Acetylenetrue
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Answer : 4. "Acetylene "
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