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131.

Cycloalkane has the formula :

132.

To differentiate between carbon-12, carbon-13 and carbon-14, the instrument that you would use is :

133.

A mixture of sand and iodine can be separated by:

Number of isomeric hexanes are 5 and they are as follows:

(i) Hexane : CH₃-CH₂-CH₂-CH₂-CH₂-CH₃

(ii) 2-methyl pentane : CH₂- $\underset{{CH}_{3}}{\underset{|}{CH}}$ -CH₂-CH₂-CH₃

(iii) 3-methyl pentane : CH₃-CH₂- $\underset{{CH}_{3}}{\underset{|}{CH}}$ -CH₂-CH₃

(iv) 2, 2-dimethyl butane : CH₃- ${C_{|}^{|}}_{{CH}_{3}}^{{CH}_{3}}$ -CH₂-CH₃

(v) 2, 3-dimethyl butane : CH₃- $\underset{{CH}_{3}}{\underset{|}{CH}} - \underset{{CH}_{3}}{\underset{|}{CH}}$ -CH₃

135.

Which of the following statement is wrong ?

Using Lassaigne's test nitrogen and sulphur present in organic compound can be tested
Using Beilstein's test the presence of halogen in a compound can be tested.
In Lassaigne's filtrate the nitrogen present in a organic compound is converted into NaCN
In the estimation of carbon, an organic compound is heated with CaO in a combustion tube

136.

Cis-trans isomers generally :

137.

How many structural isomers are possible for C₄H₉Cl?

138.

Which of the following compound is optically active?

139.

2-propanol + NaBr $\overset{Reflux}{\to}$ X. What is X?

140.

Propanal and propanone are