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Hydride, in simple terms, is said to be the anion of hydrogen. It is a chemical compound where the hydrogen atoms exhibit nucleophilic, basic or reducing properties. Usually, in a hydride, the hydrogen has the oxidation number equal to −1. Some of the most popular examples include water (H2O), methane (CH4) and ammonia (NH3).
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Crystallisationis a process that separates a pure solid in the form of its crystals from a solution. The crystallisation method is used to purify solids.
For example, the salt we get from sea water can have many impurities in it. To remove these impurities, the process of crystallisation is used.
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Strength of the solution is defined as the amount of solute in grams that is present in one litre solution. There are many quantities that represent the strength of the solution which is normality, molarity and molality.
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| ELECTROPHILE | NUCLEOPHILE |
| Also called as Lewis acid | Also called as Lewis base |
| They are positively charged / neutral | They are negatively charged / neutral |
| They undergo electrophilic addition and electrophilic substitution reactions | They undergo nucleophilic addition and nucleophilic substitution reactions |
| Electron-deficient | Electron-rich |
| It accepts a pair of an electron to form a covalent bond | It donates a pair of an electron to form a covalent bond |
| All carbocations | All carbanions |
| Example: Hydronium Ion | Example: Chloride Ion |
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Annu Yadav 5 years, 7 months ago
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