Chemistry Practice Question and Answer
8 Q: Which is the purest form of iron?
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5ed8a86454f88e519fa1af9a- 1Steelfalse
- 2Cast ironfalse
- 3Pig ironfalse
- 4Wrought irontrue
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Answer : 4. "Wrought iron "
Q: What is the main raw material in glass?
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5ed5f57b5ccf7008ed8ca454- 1Copperfalse
- 2Zinkfalse
- 3Cadmiumfalse
- 4Silicatrue
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Answer : 4. "Silica"
Q: The chemical name of limestone is?
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5f0eda3fb6738d790d13f5d3- 1Sodium Chloridefalse
- 2Sodium Sulphidefalse
- 3Calcium carbonatetrue
- 4Magnesium Chloridefalse
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Answer : 3. "Calcium carbonate "
Q: Which one of the following polymer is used in making bullet - proof vest?
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5f06e6dfb13c2d244adae1f1- 1Teflonfalse
- 2Polyurethanefalse
- 3Bakelitefalse
- 4Polyamidetrue
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Answer : 4. "Polyamide "
Q: The melting point of tungsten is____.
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5f86a2598a599d39499a8013- 13,083 ° Cfalse
- 23,830 ° Cfalse
- 33,380 ° Ctrue
- 43,308 ° Cfalse
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Answer : 3. "3,380 ° C"
Q: Which one of the following is also known as ' wood spirit’s?
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5efc069ee824154f4027ad4b- 1Methyl alcoholtrue
- 2Ethyl alcoholfalse
- 3Ethylene glycolfalse
- 4Glycerolfalse
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Answer : 1. "Methyl alcohol "
Q: Which of the following is the most common kidney stone-forming compound?
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5ee85d18c9ddb00b8bda9adc- 1Calcium oxalatetrue
- 2Magnesium oxidefalse
- 3Sodium bicarbonatefalse
- 4Magnesium citratefalse
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Answer : 1. "Calcium oxalate"
Q: Which two atoms form an ionic bond? 1353 05b5cc604e4d2b4197774b4b7
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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.