(a) The atomic number of the given element is 2 + 8 + 7(= 17). (b) It would be chemically similar to fluorine [F(9)] because its electronic configuration is 2, 7.
(a) The atomic number of the given element is 2 + 8 + 7(= 17).
(b) It would be chemically similar to fluorine [F(9)] because its electronic configuration is 2, 7.
(b) X elements from compound XCl2 which is most likely formed compound as magnesium because of having the same valency whereas the rest of other elements as Na, Al and Si don't match the valence electron to that of X.
(b) X elements from compound XCl2 which is most likely formed compound as magnesium because of having the same valency whereas the rest of other elements as Na, Al and Si don’t match the valence electron to that of X.
(c) The atoms lose their electrons more easily. As we move from left to right across the periods of the periodic table, the non-metallic character increases. So, the tendency to lose electrons decreases.
(c) The atoms lose their electrons more easily.
As we move from left to right across the periods of the periodic table, the non-metallic character increases. So, the tendency to lose electrons decreases.
The dirt present on clothes is oily in nature and insoluble in water. Therefore, it cannot be removed by only washing with water. When soap is dissolved in water, its hydrophobic ends attach themselves to the dirt and remove it from the cloth. Then, the molecules of soap arrange themselves in micellRead more
The dirt present on clothes is oily in nature and insoluble in water. Therefore, it cannot be removed by only washing with water. When soap is dissolved in water, its hydrophobic ends attach themselves to the dirt and remove it from the cloth. Then, the molecules of soap arrange themselves in micelle formation and trap the dirt at the centre of the cluster. These micelles remain suspended in the water. When flushed with excess water, the dust particles are easily rinsed away by water.
Butter contains saturated fats. Therefore, it cannot be hydrogenated. On the other hand, oil has unsaturated fats. That is why it can be hydrogenated to saturated fats (solids). Bromine water test - Cooking oil will decolourise the red colour of bromine water on shaking while butter will not.
Butter contains saturated fats. Therefore, it cannot be hydrogenated. On the other hand, oil has unsaturated fats. That is why it can be hydrogenated to saturated fats (solids).
Bromine water test – Cooking oil will decolourise the red colour of bromine water on shaking while butter will not.
Hydrogenation is the process of addition of hydrogen to unsaturated hydrocarbons in the presence of palladium and nickel catalysts to give saturated hydrocarbons. This reaction is applied in the hydrogenation of vegetables oils, which contain long chains of unsaturated carbons.
Hydrogenation is the process of addition of hydrogen to unsaturated hydrocarbons in the presence of palladium and nickel catalysts to give saturated hydrocarbons.
This reaction is applied in the hydrogenation of vegetables oils, which contain long chains of unsaturated carbons.
An atom has electronic configuration 2, 8, 7. What is the atomic number of this element?
(a) The atomic number of the given element is 2 + 8 + 7(= 17). (b) It would be chemically similar to fluorine [F(9)] because its electronic configuration is 2, 7.
(a) The atomic number of the given element is 2 + 8 + 7(= 17).
See less(b) It would be chemically similar to fluorine [F(9)] because its electronic configuration is 2, 7.
What property do all elements in the same column of the Periodic Table as fluorine have in common?
Elements in the same column or group as fluorine form acidic oxides and have seven electrons in their outermost shells and have valency of one.
Elements in the same column or group as fluorine form acidic oxides and have seven electrons in their outermost shells and have valency of one.
See lessWhat property do all elements in the same column of the Periodic Table as boron have in common ?
Elements in the same column or group as boron have valency of three and have three valence electrons.
Elements in the same column or group as boron have valency of three and have three valence electrons.
See lessWhich element has
(a) Neon (2, 8) (b) Magnesium (c) Silicon (2, 8, 4) (d) Boron (2, 3) (e) Carbon (2, 4)
(a) Neon (2, 8)
See less(b) Magnesium
(c) Silicon (2, 8, 4)
(d) Boron (2, 3)
(e) Carbon (2, 4)
Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as
(b) X elements from compound XCl2 which is most likely formed compound as magnesium because of having the same valency whereas the rest of other elements as Na, Al and Si don't match the valence electron to that of X.
(b) X elements from compound XCl2 which is most likely formed compound as magnesium because of having the same valency whereas the rest of other elements as Na, Al and Si don’t match the valence electron to that of X.
See lessWhich of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic Table.
(c) The atoms lose their electrons more easily. As we move from left to right across the periods of the periodic table, the non-metallic character increases. So, the tendency to lose electrons decreases.
(c) The atoms lose their electrons more easily.
As we move from left to right across the periods of the periodic table, the non-metallic character increases. So, the tendency to lose electrons decreases.
See lessExplain the mechanism of the cleaning action of soaps.
The dirt present on clothes is oily in nature and insoluble in water. Therefore, it cannot be removed by only washing with water. When soap is dissolved in water, its hydrophobic ends attach themselves to the dirt and remove it from the cloth. Then, the molecules of soap arrange themselves in micellRead more
The dirt present on clothes is oily in nature and insoluble in water. Therefore, it cannot be removed by only washing with water. When soap is dissolved in water, its hydrophobic ends attach themselves to the dirt and remove it from the cloth. Then, the molecules of soap arrange themselves in micelle formation and trap the dirt at the centre of the cluster. These micelles remain suspended in the water. When flushed with excess water, the dust particles are easily rinsed away by water.
See lessGive a test that can be used to differentiate between saturated and unsaturated hydrocarbons.
Butter contains saturated fats. Therefore, it cannot be hydrogenated. On the other hand, oil has unsaturated fats. That is why it can be hydrogenated to saturated fats (solids). Bromine water test - Cooking oil will decolourise the red colour of bromine water on shaking while butter will not.
Butter contains saturated fats. Therefore, it cannot be hydrogenated. On the other hand, oil has unsaturated fats. That is why it can be hydrogenated to saturated fats (solids).
Bromine water test – Cooking oil will decolourise the red colour of bromine water on shaking while butter will not.
See lessWhich of the following hydrocarbons undergo addition reactions
Unsaturated hydrocarbons undergo addition reactions. As these are unsaturated hydrocarbons, C3H6 and C2H2 undergo addition reactions.
Unsaturated hydrocarbons undergo addition reactions. As these are unsaturated hydrocarbons, C3H6 and C2H2 undergo addition reactions.
See lessWhat is hydrogenation? What is its industrial application?
Hydrogenation is the process of addition of hydrogen to unsaturated hydrocarbons in the presence of palladium and nickel catalysts to give saturated hydrocarbons. This reaction is applied in the hydrogenation of vegetables oils, which contain long chains of unsaturated carbons.
Hydrogenation is the process of addition of hydrogen to unsaturated hydrocarbons in the presence of palladium and nickel catalysts to give saturated hydrocarbons.
This reaction is applied in the hydrogenation of vegetables oils, which contain long chains of unsaturated carbons.
See less