Chemistry

When alpha particles pass through the gold foil, alpha particle deflected because according to Thompson model positive charge dispersed through out the atom.

Characteristics of crystalline solids:-

Crystalline solid have long range order.

Crystalline solid are anisotropic in nature.

Crystalline solid have definite heat of fusion.
Characteristics of amorphous solids:-

Amorphous solids have short range of order.

Amorphous solids are sometimes called pseudo solids.

Amorphous solids soften over a range of temperature.

Vitamin B₁₂ is not water soluble chemical.

CH₃ – (CH₂)₁₆ – COONa is the sodium salt of fatty acid used in soap is not synthetic detergent.

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p- toluenesulphonyl chloride

Only gives soluble product with alkali for 1° amine and for 2°- amine it gives insoluble product.

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Kindly consider the following Image 

OH group is the more activating group and ortho-para director, hence ortho position attach will provide meta substituted product with respect to – CH₃ in option (C).

Tautomerism is a dynamic equilibrium between 2 isomers, also known as tautomers, where a compound exists in 2 different structures. The most common form is keto enol tautomerism. It is mainly of two types:

• Keto Form: Contains a C=O (carbonyl) group
• Enol Form: Contains a C=C double bond and an –OH group