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प्रश्न
Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
पर्याय
Addition reaction
Substitution reaction
Displacement reaction
Oxidation reaction
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उत्तर
Addition reaction
Explanation -
Unsaturated hydrocarbons add hydrogen in the presence of catalysts such as palladium or nickel to give saturated hydrocarbons. This addition reaction is commonly used in the hydrogenation of vegetable oils using a nickel catalyst. Vegetable oils generally have long unsaturated carbon chains while animal fats have saturated carbon chains.
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संबंधित प्रश्न
What type of bonds are present in hydrogen chloride and oxygen?
What type of bonds are present in methane (CH4) and sodium chloride (NaCl)?
What type of bonds are present in Cl2 molecule? Draw their electron-dot structures.
Fill in the blank in the following sentence:
The number of single covalent bonds in C2H2 molecule are ...........
What type of bond is present in oxygen molecule?
Explain why, graphite can be used as a lubricant but diamond cannot.
State any two uses of diamond.
State any two uses of graphite.
One of the following is not an allotrope of carbon. This is:
(a) diamond
(b) graphite
(c) cumene
(d) buckministerfullerene
A solid element X has four electrons in the outermost shell of its atom. An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads.
(a) What is element X?
(b) Name the allotrope Y.
(c) State whether allotrope Y is a good conductor or non-conductor of electricity.
(d) Name one use of allotrope Y (other than lubrication and pencil leads)
(e) Name two other allotropes of element X.
Define a covalent bond.
State the type of bonding in the following molecule.
Methane
Molecular formula of Propane is C3H8 , write the structural formula of propane.
Explain the structure of Ammonium ion.
Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions.
Generally, the melting and boiling point of carbon compounds are found to be less than _______ °C.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc}\phantom{......}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\ \phantom{.....}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C = C}\\\phantom{.....}|\phantom{.........}|\\ \phantom{.....}\ce{H}\phantom{........}\ce{H}\end{array}\] |
Identify the incorrect statement and correct them.
- Like covalent compounds, coordinate compounds also contain charged particles (ions). So they are good conductors of electricity.
- Ionic bond is a weak bond when compared to Hydrogen bond.
- Ionic or electrovalent bonds are formed by mutual sharing of electrons between atoms.
- Loss of electrons is called Oxidation and gain of electron is called Reduction.
- The electrons which are not involved in bonding are called valence electrons.
Acetic acid was added to a solid X kept in a test tube. A colourless, odourless gas Y was evolved. The gas was passed through lime water, which turned milky. It was concluded that ______.
Assertion (A): Melting point and boiling point of ethanol are lower than that of sodium chloride.
Reason (R): The forces of attraction between the molecules of ionic compounds are very strong.
