(i) The general formula for oxides of 1st, 2nd, third and 4th group are R2O, RO, R2O3 and RO2 respectively in the Mendeleev’s Periodic Table, where R denotes the element. (ii) Since, Potassium (K) belongs to 1st group, thus, formula of its oxide would be K2O. (iii) Barium (Ba) belongs to 2nd group,Read more
(i) The general formula for oxides of 1st, 2nd, third and 4th group are R2O, RO, R2O3 and RO2 respectively in the Mendeleev’s Periodic Table, where R denotes the element.
(ii) Since, Potassium (K) belongs to 1st group, thus, formula of its oxide would be K2O.
(iii) Barium (Ba) belongs to 2nd group, thus formula of its oxide would be BaO.
(iv) Aluminium (Al) belongs to the 3rd group, thus, formula of its oxide would be Al2O3.
(v) Carbon (C) and Silicon (Si) belong to the 4th group, thus, formula of its oxide would be CO2 and SiO2 respectively.
(vi) Thus, formula of oxides of the given elements would be K2O, CO2, Al2O3, SiO2 and BaO; respectively.
Limitations of Newland’s Law of Octaves: (i) Newland’s Law of Octaves was applicable up to calcium only. (ii) Elements after Calcium did not obey the Newland’s Law of Octaves. (iii) Newland adjusted two elements under the same slot inspite of their different properties, such as cobalt and chlorine wRead more
Limitations of Newland’s Law of Octaves:
(i) Newland’s Law of Octaves was applicable up to calcium only.
(ii) Elements after Calcium did not obey the Newland’s Law of Octaves.
(iii) Newland adjusted two elements under the same slot inspite of their different properties, such as cobalt and chlorine were put in the same note while there properties were different.
(iv) It appears that Newland assumed that only 56 elements existed in nature; after discovery of more elements his Law could no longer hold true.
Limitations of Dobereiner’s classification: (i) Dobereiner could find only three triads; .i.e total of 9 elements only. (ii) However the total number of elements were more than that of those encompassed in Dobereiner’s Triad. (iii) Thus, Dobereiner’s could not be classify most of the elements knownRead more
Limitations of Dobereiner’s classification:
(i) Dobereiner could find only three triads; .i.e total of 9 elements only.
(ii) However the total number of elements were more than that of those encompassed in Dobereiner’s Triad.
(iii) Thus, Dobereiner’s could not be classify most of the elements known at that time.
Yes, Dobereiner’s traiads exists in the columns of Newland’s Octaves. Example - In the Dobereiner’s triads Lithium, Sodium and Potassium make a triad, and these elements also present in the same column of Newland’s Octaves as these have same properties.
Yes, Dobereiner’s traiads exists in the columns of Newland’s Octaves.
Example – In the Dobereiner’s triads Lithium, Sodium and Potassium make a triad, and these elements also present in the same column of Newland’s Octaves as these have same properties.
Fats are present in the intestine in the form of large globules which makes it difficult for enzymes to act on them. Bile salts break them down into smaller globules increasing the efficiency of enzyme action. The pancreas secretes pancreatic juice which contains enzyme called lipase for breaking doRead more
Fats are present in the intestine in the form of large globules which makes it difficult for enzymes to act on them. Bile salts break them down into smaller globules increasing the efficiency of enzyme action. The pancreas secretes pancreatic juice which contains enzyme called lipase for breaking down emulsified fats. The walls of the small intestine contain glands which secrete intestinal juice. The enzymes present in it finally convert fats into fatty acids and glycerol.
In aerobic respiration there is complete oxidation of glucose and the end product is water and carbon dioxide. In anaerobic respiration there is incomplete oxidation of glucose and the end product is either lactic acid or alcohol. Yeast and bacteria use anaerobic mode of respiration.
In aerobic respiration there is complete oxidation of glucose and the end product is water and carbon dioxide.
In anaerobic respiration there is incomplete oxidation of glucose and the end product is either lactic acid or alcohol.
Yeast and bacteria use anaerobic mode of respiration.
Haemoglobin is the carrier of oxygen in blood. Deficiency of haemoglobin will lead to less supply of oxygen to different cells. This will, in turn lead inefficient utilization of food by the body. Finally person’s health will deteriorate.
Haemoglobin is the carrier of oxygen in blood. Deficiency of haemoglobin will lead to less supply of oxygen to different cells. This will, in turn lead inefficient utilization of food by the body. Finally person’s health will deteriorate.
Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements: K, C, AI, Si, Ba.
(i) The general formula for oxides of 1st, 2nd, third and 4th group are R2O, RO, R2O3 and RO2 respectively in the Mendeleev’s Periodic Table, where R denotes the element. (ii) Since, Potassium (K) belongs to 1st group, thus, formula of its oxide would be K2O. (iii) Barium (Ba) belongs to 2nd group,Read more
(i) The general formula for oxides of 1st, 2nd, third and 4th group are R2O, RO, R2O3 and RO2 respectively in the Mendeleev’s Periodic Table, where R denotes the element.
See less(ii) Since, Potassium (K) belongs to 1st group, thus, formula of its oxide would be K2O.
(iii) Barium (Ba) belongs to 2nd group, thus formula of its oxide would be BaO.
(iv) Aluminium (Al) belongs to the 3rd group, thus, formula of its oxide would be Al2O3.
(v) Carbon (C) and Silicon (Si) belong to the 4th group, thus, formula of its oxide would be CO2 and SiO2 respectively.
(vi) Thus, formula of oxides of the given elements would be K2O, CO2, Al2O3, SiO2 and BaO; respectively.
What were the limitations of Newlands’ Law of Octaves?
Limitations of Newland’s Law of Octaves: (i) Newland’s Law of Octaves was applicable up to calcium only. (ii) Elements after Calcium did not obey the Newland’s Law of Octaves. (iii) Newland adjusted two elements under the same slot inspite of their different properties, such as cobalt and chlorine wRead more
Limitations of Newland’s Law of Octaves:
See less(i) Newland’s Law of Octaves was applicable up to calcium only.
(ii) Elements after Calcium did not obey the Newland’s Law of Octaves.
(iii) Newland adjusted two elements under the same slot inspite of their different properties, such as cobalt and chlorine were put in the same note while there properties were different.
(iv) It appears that Newland assumed that only 56 elements existed in nature; after discovery of more elements his Law could no longer hold true.
What were the limitations of Döbereiner’s classification?
Limitations of Dobereiner’s classification: (i) Dobereiner could find only three triads; .i.e total of 9 elements only. (ii) However the total number of elements were more than that of those encompassed in Dobereiner’s Triad. (iii) Thus, Dobereiner’s could not be classify most of the elements knownRead more
Limitations of Dobereiner’s classification:
See less(i) Dobereiner could find only three triads; .i.e total of 9 elements only.
(ii) However the total number of elements were more than that of those encompassed in Dobereiner’s Triad.
(iii) Thus, Dobereiner’s could not be classify most of the elements known at that time.
Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.
Yes, Dobereiner’s traiads exists in the columns of Newland’s Octaves. Example - In the Dobereiner’s triads Lithium, Sodium and Potassium make a triad, and these elements also present in the same column of Newland’s Octaves as these have same properties.
Yes, Dobereiner’s traiads exists in the columns of Newland’s Octaves.
See lessExample – In the Dobereiner’s triads Lithium, Sodium and Potassium make a triad, and these elements also present in the same column of Newland’s Octaves as these have same properties.
How are fats digested in our bodies? Where does this process take place?
Fats are present in the intestine in the form of large globules which makes it difficult for enzymes to act on them. Bile salts break them down into smaller globules increasing the efficiency of enzyme action. The pancreas secretes pancreatic juice which contains enzyme called lipase for breaking doRead more
Fats are present in the intestine in the form of large globules which makes it difficult for enzymes to act on them. Bile salts break them down into smaller globules increasing the efficiency of enzyme action. The pancreas secretes pancreatic juice which contains enzyme called lipase for breaking down emulsified fats. The walls of the small intestine contain glands which secrete intestinal juice. The enzymes present in it finally convert fats into fatty acids and glycerol.
See lessWhat is the role of saliva in the digestion of food?
Saliva contains the enzyme amylase which breaks complex molecules into sugar.
Saliva contains the enzyme amylase which breaks complex molecules into sugar.
See lessWhat are the necessary conditions for autotrophic nutrition and what are its by products?
Conditions necessary for photosynthesis: Sunlight, carbon dioxide and chlorophyll. Byproduct of photosynthesis: Oxygen
Conditions necessary for photosynthesis:
See lessSunlight, carbon dioxide and chlorophyll.
Byproduct of photosynthesis: Oxygen
What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.
In aerobic respiration there is complete oxidation of glucose and the end product is water and carbon dioxide. In anaerobic respiration there is incomplete oxidation of glucose and the end product is either lactic acid or alcohol. Yeast and bacteria use anaerobic mode of respiration.
In aerobic respiration there is complete oxidation of glucose and the end product is water and carbon dioxide.
See lessIn anaerobic respiration there is incomplete oxidation of glucose and the end product is either lactic acid or alcohol.
Yeast and bacteria use anaerobic mode of respiration.
How are the alveoli designed to maximise the exchange of gases?
The wall of alveoli contains a fine network of blood capillaries. This ensures maximum exchange of gases.
The wall of alveoli contains a fine network of blood capillaries. This ensures maximum exchange of gases.
See lessWhat would be the consequences of a deficiency of haemoglobin in our bodies?
Haemoglobin is the carrier of oxygen in blood. Deficiency of haemoglobin will lead to less supply of oxygen to different cells. This will, in turn lead inefficient utilization of food by the body. Finally person’s health will deteriorate.
Haemoglobin is the carrier of oxygen in blood. Deficiency of haemoglobin will lead to less supply of oxygen to different cells. This will, in turn lead inefficient utilization of food by the body. Finally person’s health will deteriorate.
See less