An acid when reacts with a metal Hydrogen gas is liberated Let's take a few pieces of zinc metals and add a few drops of dilute H2SO4 mouth of the test tube is fitted with a cork and the delivery tube is fitted so that the gas evolved reaches the soap solution. Hydrogen gas forms bubbles on tRead more
An acid when reacts with a metal Hydrogen gas is liberated
Let’s take a few pieces of zinc metals and add a few drops of dilute H2SO4 mouth of the test tube is fitted with a cork and the delivery tube is fitted so that the gas evolved reaches the soap solution. Hydrogen gas forms bubbles on the soap solution.
H2SO4 + Zn → ZnSO4 + H2 ↑
When we bring a burning candle near the gas, a pop sound will produce. It indicates the presence of Hydrogen gas.
Curd and other sour substances should not be kept in metal vessels like copper and brass because this substance contains acids that react with the acid to liberate hydrogen gas and harmful products or poisonous substances, therefore spoiling the food.
Curd and other sour substances should not be kept in metal vessels like copper and brass because this substance contains acids that react with the acid to liberate hydrogen gas and harmful products or poisonous substances, therefore spoiling the food.
Litmus papers are indicators that differentiate between acidic, basic and neutral solutions. Red litmus changes to blue with basic solution If the colour of red litmus paper gets changed to blue, then it indicates that the given solution is a base and if there is no colour change, then it is eitherRead more
Litmus papers are indicators that differentiate between acidic, basic and neutral solutions. Red litmus changes to blue with basic solution If the colour of red litmus paper gets changed to blue, then it indicates that the given solution is a base and if there is no colour change, then it is either acidic or neutral. Whereas blue litmus turns to red with acidic solution. If the colour of blue litmus paper gets changed to red, then it indicates that the given solution is a acid and if there is no colour change, then it is either basic or neutral. This can be best explained by a simple experiment. Let’s take 3 test tubes and labelled as A, B, and C which contain water, acidic and basic solutions respectively by using litmus paper test. We confirm that test tube A does not show any change in that indicates it is not acid and base. Test tube B also does not show any change in litmus paper. Only test tube C changes red litmus to blue indicating the solution is base.
There should be equitable distribution of resources among all people—rich and poor, so that all are benefited from the development of these resources. Such an even distribution of resources restricts the exploitation, wastage and misuse of these resources. The poor will also get a chance to make benRead more
There should be equitable distribution of resources among all people—rich and poor, so that all are benefited from the development of these resources. Such an even distribution of resources restricts the exploitation, wastage and misuse of these resources. The poor will also get a chance to make benefit for himself and the society will improve. Unfortunately, it has been deserved that mainly the rich and the powerful take the full advantage of these resources and the poor are devoid of its pleasure. Thus, rich and powerful people for their personal benefit work against the equitable distribution.
The long-term model of resource consumption enables the conservation of the resources for them to be used by future generations. This will enable the economy to grow over a longer time frame. It also provides more time for technology to advance and discover new, sustainable energy sources (such as nRead more
The long-term model of resource consumption enables the conservation of the resources for them to be used by future generations. This will enable the economy to grow over a longer time frame. It also provides more time for technology to advance and discover new, sustainable energy sources (such as nuclear fusion and fuel cells). All in all, the long-term perspective in managing of resources has significantly greater advantages when compared to the short-term perspective
The advantages of using resources with short-term goals are listed below The need for a wider population can be fulfilled. It guarantees the company’s growth. Commercial development may begin.
The advantages of using resources with short-term goals are listed below
Decomposers feed on dead things: dead plant materials such as leaf litter and wood, animal carcasses, and faeces. They perform a valuable service as Earth's cleanup crew. Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere.
Decomposers feed on dead things: dead plant materials such as leaf litter and wood, animal carcasses, and faeces. They perform a valuable service as Earth’s cleanup crew. Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere.
The trophic level is the step or level included in a food chain. It denotes the number of steps the organism is from the start of the chain. An organism may not always occupy the same trophic level it can differ accordingly based on the food chain. For example, Grass–> Grasshopper–> Frog–>Read more
The trophic level is the step or level included in a food chain. It denotes the number of steps the organism is from the start of the chain. An organism may not always occupy the same trophic level it can differ accordingly based on the food chain.
For example,
Grass–> Grasshopper–> Frog–> Snake
Plants are the producers, and represents the first trophic level. Grasshoppers are the primary consumers, and represent the second trophic level. Frogs are the secondary consumers, and represent the third trophic level. Snakes are the tertiary consumers and represent the fourth trophic level.
Cooking gas like LPG or CNG would be preferred. They have characteristics of a good fuel. The ignition temperature, calorific value are apt and has non-pollution characteristics.
Cooking gas like LPG or CNG would be preferred. They have characteristics of a good fuel. The ignition temperature, calorific value are apt and has non-pollution characteristics.
Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.
Suppose Metal compound A is calcium carbonate when reacted with HCl it produces a compound CaCl2 with CO2 and water.
Suppose Metal compound A is calcium carbonate when reacted with HCl it produces a compound CaCl2 with CO2 and water.
See lessWhich gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?
An acid when reacts with a metal Hydrogen gas is liberated Let's take a few pieces of zinc metals and add a few drops of dilute H2SO4 mouth of the test tube is fitted with a cork and the delivery tube is fitted so that the gas evolved reaches the soap solution. Hydrogen gas forms bubbles on tRead more
An acid when reacts with a metal Hydrogen gas is liberated
Let’s take a few pieces of zinc metals and add a few drops of dilute H2SO4 mouth of the test tube is fitted with a cork and the delivery tube is fitted so that the gas evolved reaches the soap solution. Hydrogen gas forms bubbles on the soap solution.
H2SO4 + Zn → ZnSO4 + H2 ↑
When we bring a burning candle near the gas, a pop sound will produce. It indicates the presence of Hydrogen gas.
See lessWhy should curd and sour substances not be kept in brass and copper vessels?
Curd and other sour substances should not be kept in metal vessels like copper and brass because this substance contains acids that react with the acid to liberate hydrogen gas and harmful products or poisonous substances, therefore spoiling the food.
Curd and other sour substances should not be kept in metal vessels like copper and brass because this substance contains acids that react with the acid to liberate hydrogen gas and harmful products or poisonous substances, therefore spoiling the food.
See lessYou have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
Litmus papers are indicators that differentiate between acidic, basic and neutral solutions. Red litmus changes to blue with basic solution If the colour of red litmus paper gets changed to blue, then it indicates that the given solution is a base and if there is no colour change, then it is eitherRead more
Litmus papers are indicators that differentiate between acidic, basic and neutral solutions. Red litmus changes to blue with basic solution If the colour of red litmus paper gets changed to blue, then it indicates that the given solution is a base and if there is no colour change, then it is either acidic or neutral. Whereas blue litmus turns to red with acidic solution. If the colour of blue litmus paper gets changed to red, then it indicates that the given solution is a acid and if there is no colour change, then it is either basic or neutral. This can be best explained by a simple experiment. Let’s take 3 test tubes and labelled as A, B, and C which contain water, acidic and basic solutions respectively by using litmus paper test. We confirm that test tube A does not show any change in that indicates it is not acid and base. Test tube B also does not show any change in litmus paper. Only test tube C changes red litmus to blue indicating the solution is base.
See lessWhy do you think that there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?
There should be equitable distribution of resources among all people—rich and poor, so that all are benefited from the development of these resources. Such an even distribution of resources restricts the exploitation, wastage and misuse of these resources. The poor will also get a chance to make benRead more
There should be equitable distribution of resources among all people—rich and poor, so that all are benefited from the development of these resources. Such an even distribution of resources restricts the exploitation, wastage and misuse of these resources. The poor will also get a chance to make benefit for himself and the society will improve. Unfortunately, it has been deserved that mainly the rich and the powerful take the full advantage of these resources and the poor are devoid of its pleasure. Thus, rich and powerful people for their personal benefit work against the equitable distribution.
See lessHow would these advantages differ from the advantages of using a longterm perspective in managing our resources?
The long-term model of resource consumption enables the conservation of the resources for them to be used by future generations. This will enable the economy to grow over a longer time frame. It also provides more time for technology to advance and discover new, sustainable energy sources (such as nRead more
The long-term model of resource consumption enables the conservation of the resources for them to be used by future generations. This will enable the economy to grow over a longer time frame. It also provides more time for technology to advance and discover new, sustainable energy sources (such as nuclear fusion and fuel cells). All in all, the long-term perspective in managing of resources has significantly greater advantages when compared to the short-term perspective
See lessWhat would be the advantages of exploiting resources with short-term aims?
The advantages of using resources with short-term goals are listed below The need for a wider population can be fulfilled. It guarantees the company’s growth. Commercial development may begin.
The advantages of using resources with short-term goals are listed below
- The need for a wider population can be fulfilled.
- It guarantees the company’s growth.
- Commercial development may begin.
See lessWhat is the role of decomposers in the ecosystem?
Decomposers feed on dead things: dead plant materials such as leaf litter and wood, animal carcasses, and faeces. They perform a valuable service as Earth's cleanup crew. Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere.
Decomposers feed on dead things: dead plant materials such as leaf litter and wood, animal carcasses, and faeces. They perform a valuable service as Earth’s cleanup crew. Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere.
See lessWhat are trophic levels? Give an example of a food chain and state the different trophic levels in it.
The trophic level is the step or level included in a food chain. It denotes the number of steps the organism is from the start of the chain. An organism may not always occupy the same trophic level it can differ accordingly based on the food chain. For example, Grass–> Grasshopper–> Frog–>Read more
The trophic level is the step or level included in a food chain. It denotes the number of steps the organism is from the start of the chain. An organism may not always occupy the same trophic level it can differ accordingly based on the food chain.
For example,
Grass–> Grasshopper–> Frog–> Snake
Plants are the producers, and represents the first trophic level. Grasshoppers are the primary consumers, and represent the second trophic level. Frogs are the secondary consumers, and represent the third trophic level. Snakes are the tertiary consumers and represent the fourth trophic level.
See lessIf you could use any source of energy for heating your food, which one would you use and why?
Cooking gas like LPG or CNG would be preferred. They have characteristics of a good fuel. The ignition temperature, calorific value are apt and has non-pollution characteristics.
Cooking gas like LPG or CNG would be preferred. They have characteristics of a good fuel. The ignition temperature, calorific value are apt and has non-pollution characteristics.
See less