Chemistry Questions Practice Question and Answer
8 Q: Milk is a natural
2018 05ed63d274bd6e60aba33c8a4
5ed63d274bd6e60aba33c8a4- 1Solutionfalse
- 2Mixturefalse
- 3Suspensionfalse
- 4Emulsiontrue
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Answer : 4. "Emulsion "
Q: Who is called the father of modern chemistry?
2014 05ef430d7bea49d16b47d5818
5ef430d7bea49d16b47d5818- 1Daltonfalse
- 2Lavoisiertrue
- 3Mendeleevfalse
- 4None of thesefalse
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Answer : 2. "Lavoisier"
Q: Impure camphor is purified by
1982 05ed8d0e4e4997750bdbabbef
5ed8d0e4e4997750bdbabbef- 1sublimationtrue
- 2fractional crystallizationfalse
- 3fractional distillationfalse
- 4steam distillationfalse
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Answer : 1. "sublimation"
Q: What is the main raw material in glass?
1963 05ed5f57b5ccf7008ed8ca454
5ed5f57b5ccf7008ed8ca454- 1Copperfalse
- 2Zinkfalse
- 3Cadmiumfalse
- 4Silicatrue
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Answer : 4. "Silica"
Q: The gas used for artificial fruit ripening of green fruit is
1918 05ed634c2436d8a49583c72fa
5ed634c2436d8a49583c72fa- 1Ethanefalse
- 2Ethylenefalse
- 3Methanefalse
- 4Acetylenetrue
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Answer : 4. "Acetylene "
Q: What is the role of a positive catalyst in a chemical reaction?
1861 05ed8d7d354f88e519fa2312f
5ed8d7d354f88e519fa2312f- 1It increases the rate of reactiontrue
- 2It decreases the rate of reactionfalse
- 3It increases the yield of the productsfalse
- 4It provides better purity of the productsfalse
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Answer : 1. "It increases the rate of reaction "
Q: Which two atoms form an ionic bond? 1691 05b5cc604e4d2b4197774b4b7
5b5cc604e4d2b4197774b4b7- Show Answer
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Answer :
Explanation :
Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another.. This bond generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion. Example :: One example of an ionic bond is the formation of sodium fluoride, NaF, from a sodium atom and a fluorine atom. In this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and are attracted to one another due to electrostatic forces.
Q: Which is the purest form of iron?
1678 05ed8a86454f88e519fa1af9a
5ed8a86454f88e519fa1af9a- 1Steelfalse
- 2Cast ironfalse
- 3Pig ironfalse
- 4Wrought irontrue
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