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CARBON AND ITS COMPOUNDS

Updated: Feb 26

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Afzala janpati biraul Darbhanga, City br
NEW TRENDS IN ICSE CHEMISTRY - 8
CHAPTER - 9 . Carbon and Its Compounds


Tick (✔) The correct choice amongest the following

1. Carbon monoxide burns with : (a) No flame(b) Yellow flame(c) Blue flame(d) Red flame


2. For combustion reactions :(a) Air is essential(b) Combustible substance is essential(c) Both (a) and (b)(d) Neither (a) nor (b)


3. Which of the following is not an amorphous form of carbon ?(a) Coal(b) Charcoal(c) Diamond(d) Lamp black


4. Charcoal is :(a) Crystalline carbon(b) Amorphous carbon(c) Both of these(d) None of these


5. Soot is :(a) Lamp black(b) Charcoal(c) Coke(d) Graphite


6. Diamond is :(a) Soft(b) Slippery in nature(c) Hardest known substance(d) None of these


7. The weight of diamond is expressed in :(a) Carat(b) Milligram(c) Grams(d) None of these


8. Water gas is :(a) CO + H2(b) CO2 + H2(c) CO + H(d) None of these


9. Graphite is used :(a) As a lubricant(b) In making electrodes(c) In lead pencils(d) All of these


10. Allotropy is shown by :(a) Hydrogen(b) Carbon(c) Both (a) and (b)(d) None of these


Fill in The Blanks

1. The property of self linking of carbon atoms is known as .................... .


2. Radioactive isotope of carbon is .................... .


3. One carat is equal to .................... grams.


4. Diamonds shine because of high .................... .


5. Black diamonds contain .................... in them.


6. .................... is the hardest substance known.


7. .................... and .................... are the two major allotropes of carbon.


8. The atoms in a diamond are arranged in .................... manner.


9. When wood is heated in the absence of air the residue is called .................... .


10. The allotropic forms are physically .................... but chemically .................... .


Write True or False for each statment.Rewrite the Statement Correctly

1. Fullerenes have C10 and C20 carbon number.


2. Diamond is the hardest known substance.