Compounds formed on mono-chlorination of methylcyclohexane are :

∴ Total mono-chlorinated products formed = 12
The reaction sequence given below is carried out with 16 moles of X. The yield of the major product in each step is given below the product in parentheses. The amount (in grams) of S produced is ____. 
Use: Atomic mass (in amu): H = 1, C = 12, O = 16, Br = 80
Two large plane parallel conducting plates are kept 10 cm apart as shown in figure. The potential difference between them is $ V $. The potential difference between the points A and B (shown in the figure) is: 
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Net dipole moment of a polar linear isotropic dielectric substance is not zero even in the absence of an external electric field. Reason
(R): In absence of an external electric field, the different permanent dipoles of a polar dielectric substance are oriented in random directions.
In the light of the above statements, choose the most appropriate answer from the options given below:
A metallic ring is uniformly charged as shown in the figure. AC and BD are two mutually perpendicular diameters. Electric field due to arc AB to O is ‘E’ magnitude. What would be the magnitude of electric field at ‘O’ due to arc ABC? 
Stereoisomers are a type of isomer that have the same molecular formula and connectivity of atoms, but differ in the spatial arrangement of their atoms or groups. This means that stereoisomers have identical chemical properties, but different physical properties and biological activities.
There are two types of stereoisomers: enantiomers and diastereomers. Enantiomers are mirror images of each other and have the same physical and chemical properties, but they rotate plane-polarized light in opposite directions. Diastereomers, on the other hand, are stereoisomers that are not mirror images of each other and have different physical and chemical properties.
The existence of stereoisomers is due to the presence of chiral centers in a molecule. A chiral center is an atom in a molecule that is bonded to four different groups, which results in two possible spatial arrangements of the atoms around the chiral center. If a molecule has more than one chiral center, it can have multiple stereoisomers.
Read Also: Stereochemistry
Stereoisomers are important in many areas of chemistry, including drug design, biochemistry, and materials science. In drug design, for example, the different biological activities of enantiomers can lead to different therapeutic effects, while in materials science, the different physical properties of stereoisomers can be used to create new materials with unique properties. Stereoisomerism is also an important concept in organic chemistry, and understanding it is crucial for predicting and explaining the reactivity and behavior of molecules in various chemical reactions.