Fill in the blanks with the correct words from the brackets :

Alkenes are the (a) ...... (analogous/homologous) series of (b) ... (saturated/unsaturated) hydrocarbons. They differ from alkanes due to the presence of (c) .... (double/single) bonds. Alkenes mainly undergo (d) (addition/ substitution) reactions.

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Solution

Alkenes are the (a) homologous series of (b) unsaturated hydrocarbons. They differ from alkanes due to the presence of (c) double bonds. Alkenes mainly undergo (d) addition reactions.

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Q. Fill in the blanks with the correct words from the brackets:
Alkenes are the (i) ........... (analogous/homologous) series of (ii) ............ (saturated/unsaturated) hydrocarbons. They differ from alkanes due to the presence of (iii) ......... (double/single) bonds. Alkenes mainly undergo (iv) .......... (addition/substitution) reactions.

Alkenes are the homologous series of saturated hydrocarbons. Alkenes mainly undergo substitution reactions.

Choosing only words from the following list, write down appropriate words to fill in the blanks from (a) to (e) given below.

Addition, carbohydrates, $C_{n} H_{2 n_{2}}, C_{n} H_{2 n}, C_{n} H_{2 n + 2}$ , electrochemical, homologous, hydrocarbon, saturated, substitution, unsaturated.

The alkanes form a (a) ..... series with the general formula (b)....... . The alkanes are (c).......... (d) ..... which generally undergo (e) ...... reactions.

Q. Fill in the blanks by choosing words from the given list of words:
addition, carbohydrates, C_nH_2n−2, C_nH_2n_{+ 2}, electrochemical, homologous, hydrocarbons, saturated, substitution, unsaturated.
The alkanes form a ....... series with the general formula .......... The alkanes are .........., which generally undergo ........... reactions.

Q. Assertion :Unsaturated hydrocarbons contain multiple bonds between the two

C -

atoms and show addition reactions. Reason: They also undergo many other chemical reactions that alkanes do not - the double bond in alkenes makes them more reactive than alkanes

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