Haloalkanes and...

$$(+)-$$ Mandelic acid has a specific rotation of $$+158^o$$ . What would be the observed specific rotation of a mixture of $$25\%$$ $$(-)-$$ mandelic acid and $$75\% (+)-$$ mandelic acid: 

Which of the following halide undergoes in hydrolysis via $${S}_{{N}^{1}}$$ reaction?

$$CH_3CH=CH_2 \xrightarrow {Cl-I} P$$, $$P$$ is:

Which of the following reaction is used to increase the length of the carbon chain ?

The reaction of Sodium methoxide with $${R}_{2}CHX$$ is:

$$CH_{ 3 }-\overset { \overset { CH_{ 3 } }{ | }  }{ CH } -CH_{ 3 }\xrightarrow [  ]{ Cl_{ 2 } } Product$$
Major product in the above reaction is :

Predict the major in each of the following elimination reaction:

Which of the following react with $$Cl_2$$ and $$Br_2$$ at room temperature and in the absence of diffused sunlight to produce dihalogen derivatives?

Which one of the following compounds is not optically active?