Advertisements
Advertisements
प्रश्न
Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
विकल्प
Addition reaction
Substitution reaction
Displacement reaction
Oxidation reaction
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.
APPEARS IN
संबंधित प्रश्न
Why are most carbon compounds poor conductors of electricity?
What type of chemical bond is present in chlorine molecule? Explain your answer.
What is buckminsterfullerene?
Draw the electron-dot structure of a hydrogen chloride molecule.
One of the following compounds is not ionic in nature. This compound is:
(a) Lithium chloride
(b) Ammonium chloride
(c) Calcium chloride
(d) Carbon tetrachloride
The electronic configurations of three elements X, Y and Z are as follows:
| X | 2, 4 |
| Y | 2, 7 |
| Z | 2, 1 |
(a) Which two elements will combine to form an ionic compound?
(b) Which two elements will react to form a covalent compound?
Give reasons for your choice.
Give the formulae of the chlorides of the elements X and Y having atomic numbers of 3 and 6 respectively. Will the properties of the two chlorides be similar or different? Explain your answer.
What happens when methane (natural gas) burns in air? Write the chemical equation of the reaction involved.
Explain the Structural isomerism term with example.
Draw electron - dot structure and structural formula of methane.
Explain the following briefly.
Pure water does not conduct electricity, but on adding sodium chloride to it, it starts conducting electricity.
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2,8,1 |
2,8,7 |
2,5 |
1 |
Answer the following questions based on the table above:
What type of bond is formed between Y and Z.
State the type of bond formed, and draw Lewis structure of water.
Explain the following:
Water is a polar covalent molecule.
Fill in the blank and rewrite the completed statement:
Covalent compounds are generally soluble in _________ solvents.
The molecular masses of a carbon compound spread over a range of _______.
Write scientific reason.
Carbon has the property of forming many compounds.
The I.U.P.A.C name of CH3CH2CH = CH2 is?
Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of
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.
