Q23 of 312 Page 239

What type of fuels:

(a) burn with a flame?


(b) burn without a flame?

(a) The fuels which are vaporizable (can be converted to vapours) burns with flame. For example, petrol, candle and LPG in the gas burns with flame.

(b) The fuels which do not vaporize, burn without flame. For example; coal burns without flame.



More from this chapter

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21 What is the common name of ethanol? 22 What is the difference between two consecutive homologues:

(i) in terms of molecular mass?


(ii) in terms of number and kind of atoms per molecule?

 24 State whether the following statements is true or false:

The minimum number of carbon atoms in a ketone molecule is two.

 25 Fill in the following blanks with suitable words:

(a) The next higher homologues of ethanol is ………………


(b) The next homologues of C2H5OH is ……………………………….


(c) The next higher homologues of ethane is …………………………..


(d) The functional group present in ethanol is ………………………..


(e) Organic compounds having ----- PICTURE---- OH functional group are known as ………………………….