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Conditions
The reaction in Habers process is exothermic and so external heating is not required once the reaction starts. Lowering the temperature to 450 o - 500 o C favours the reaction, but lowering the temperature below 450 o - 500 o C brings down the yield. Note:- Nitrogen is..
The reaction in Habers process is exothermic and so external heating is not required once the reaction starts. Lowering the temperature to 450 o - 500 o C favours the reaction, but lowering the temperature below 450 o - 500 o C brings down the yield. Note:- Nitrogen is..Laboratory preparation
Nitric acid is usually prepared by heating potassium nitrate with concentrated sulphuric acid. This heating is done in a glass retort and vapors of nitric acid are condensed in a receiver, which is cooled by water. The reaction is:..
Nitric acid is usually prepared by heating potassium nitrate with concentrated sulphuric acid. This heating is done in a glass retort and vapors of nitric acid are condensed in a receiver, which is cooled by water. The reaction is:..
Another condition:
Using (iv), (v) and (vi), we get - h a 3 h- h b 3 k- h c 3 =0 or a 3 h+b 3 k+c 3 =0 So, the three lines are concurrent. Thus, the condition for the three lines L 1 = 0, L 2 = 0 and L 3 = 0 to be concurrent is l L 1 + m L 2..
Using (iv), (v) and (vi), we get - h a 3 h- h b 3 k- h c 3 =0 or a 3 h+b 3 k+c 3 =0 So, the three lines are concurrent. Thus, the condition for the three lines L 1 = 0, L 2 = 0 and L 3 = 0 to be concurrent is l L 1 + m L 2..Laboratory method of chloroform preparation
Ethanol (ethyl alcohol) or propanone (acetone) when treated with bleaching powder gives chloroform. This reaction is known as haloform reaction. From ethanol The reaction occurs as the bleaching powder reacts with water giving chlorine and calcium hydroxide as: ..
Ethanol (ethyl alcohol) or propanone (acetone) when treated with bleaching powder gives chloroform. This reaction is known as haloform reaction. From ethanol The reaction occurs as the bleaching powder reacts with water giving chlorine and calcium hydroxide as: ..Conditions of Combustion
Combustion - The burning of a substance is called combustion. It is an exothermic process (chemical reactions which give out heat to the surroundings are called exothermic reactions). E.g., Burning of coal Burning of butane gas (g - gas form) The common observation in the above ..
Combustion - The burning of a substance is called combustion. It is an exothermic process (chemical reactions which give out heat to the surroundings are called exothermic reactions). E.g., Burning of coal Burning of butane gas (g - gas form) The common observation in the above ..Laboratory Preparation of Nitrogen
In the laboratory, nitrogen is prepared by heating a mixture of ammonium chloride and sodium nitrite and a small quantity of water. If ammonium nitrite is heated by itself it decomposes to produce nitrogen gas. However, this reaction is very fast and may prove to be ex..
In the laboratory, nitrogen is prepared by heating a mixture of ammonium chloride and sodium nitrite and a small quantity of water. If ammonium nitrite is heated by itself it decomposes to produce nitrogen gas. However, this reaction is very fast and may prove to be ex..Conditions for Hydrogen Bonding
Conditions for Hydrogen Bonding - Since hydrogen bond comes into existence as a result of dipole-dipole interactions between the molecules, therefore, following conditions are required for effective hydrogen bonding. (i) Hydrogen atom shou..
Fig: 7.4 - Reaction between hydrogen and iodine
Thus, chemical equilibrium may be defined as the state in which the measurable properties of the system (such as pressure, density, colour or concentration) do not undergo any further noticeable change under given set of conditions is said to be a state of equilibrium. When a reacti..
Thus, chemical equilibrium may be defined as the state in which the measurable properties of the system (such as pressure, density, colour or concentration) do not undergo any further noticeable change under given set of conditions is said to be a state of equilibrium. When a reacti..Conditions For Chemical Change
The criterion for a chemical change is the production of one or more new substances. Therefore, certain conditions should be met in order to bring about a chemical change. The necessary conditions are: 1) A minimum amount of energy needed to initiate a reaction (activa..
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