Hey!

Valence bond theory  or  VB theory  is a  theory  based on quantum mechanics that explains how chemical  bonding  works. In  valence bond theory  , the atomic orbitals of individual atoms are combined to form chemical  bonds  . The other major  theory  of chemical  bonding  is molecular orbital  theory  or MO  theory  .

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Hello,

You can get previous year paper for JKBOSE 12th class by visiting the following link;

https://school.careers360.com/articles/jkbose-12th-question-papers

It will help you be acquainted with exam pattern, marking scheme,important topics and other relevant details regarding this.

Annapurna, this reaction is a very important reaction used for synthesis of methyl isocyanate ie a compound containing N=C=O group attached to a CH3- group. The reaction can be explained as follows:--

CH3NC + HgO ----->CH3N=C=O  (majorproduct)

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hello aspirant..

Ruthenium tetroxide is the organic compound with this formula. It is a yellow volatile compoound that melts at the normal room temperature. they are black in colour due to the impurities. It is formed by the  two co double bonds from the oxidative cleavage of cc  double bonds. this compound is covalent in nature.

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In physisorption the molecules get adsorbed on the surface of adsorbent due to the weak wanderwall forces and the energy of adsorption is very low in case of chemisorption there is a chemical bond formed between the adsorbent and adsorbate in the energy of adsorption is very high.

Hello dear student !

The molecular formula of Hypophosphorous Acid is H3PO2 . Therefore, in the structure of this formula two Hydrogen atoms are attached to the phosphorous atom with single bond. Also one (-OH) is attached to phosphorous in the structure. with single bond and one oxygen atom is attached to phosphorous with double bond.

Hello,

Actually this matters when you change the substance of the nitration. But usually when an ortho para substituent is present on the benzene ring for an electrophilic substitution reaction then the para product is always the major product because the electron density is higher on this position.

Hope it will be helpful for you.

Thank you.

Hello Anurag

First of all, the lyophobic and the lyophilic, both are colloids.

But the main difference is that the lyophilic colloids are solvent loving colloids. Means, there is a strong attraction between the lyophilic colloids and the liquid.

Whereas, the lyophobic colloids are solvent hating colloids. There is less or no attraction between the lyophobic colloids and the liquid.

I hope, you understood :)