A reaction in which an acid and base react with each other to form salt and water is known as neutralisation reaction. During this reaction energy is evolved in the form of heat. For example: (i) sodium hydroxide a strong base reacts with strong acid hydrochloric acid produces neutral salt sodium chRead more
A reaction in which an acid and base react with each other to form salt and water is known as neutralisation reaction. During this reaction energy is evolved in the form of heat.
For example:
(i) sodium hydroxide a strong base reacts with strong acid hydrochloric acid produces neutral salt sodium chloride and water molecules.
NaOH + HCl –> NaCl + H₂O
(ii) In case of indigestion which caused due to the excess production of hydrochloric acid in the stomach resulting in acidity, to neutralise the effect of acid an antacid, Mg(OH)₂ which is basic in nature is given, thus gives relief from indigestion.
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.
Characteristics of ideal fuel: It should be readily available. It should be economical. It should burn easily in air at a moderate rate. It should produce a large amount of heat. It should have high calorific value. It should not leave behind any undesirable substances on combustion. The fuel shouldRead more
Characteristics of ideal fuel:
It should be readily available.
It should be economical.
It should burn easily in air at a moderate rate.
It should produce a large amount of heat.
It should have high calorific value.
It should not leave behind any undesirable substances on combustion.
Drivers use convex mirror as a rear-view mirror in automobiles because of the following two reasons: 1. A convex mirror always forms an erect, virtual and diminished image of an object placed anywhere in front of it. 2. A convex mirror has a wider field of view than a plane mirror of the same size.Read more
Drivers use convex mirror as a rear-view mirror in automobiles because of the following two reasons:
1. A convex mirror always forms an erect, virtual and diminished image of an object placed anywhere in front of it.
2. A convex mirror has a wider field of view than a plane mirror of the same size.
Thus convex mirrors enable the driver to view much larger traffic behind him than would be possible with a plane mirror. The main disadvantage of a convex mirror is that it does not give the correct distance and the speed of the vehicle approaching from behind.
When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detects it and send this information to the fore brain in the form of electrical signals. Then, the fore brain interprets it by putting it together with the information received from other receptRead more
When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detects it and send this information to the fore brain in the form of electrical signals.
Then, the fore brain interprets it by putting it together with the information received from other receptors and also with the information already stored in the brain.
What is a neutralisation reaction? Give two examples.
A reaction in which an acid and base react with each other to form salt and water is known as neutralisation reaction. During this reaction energy is evolved in the form of heat. For example: (i) sodium hydroxide a strong base reacts with strong acid hydrochloric acid produces neutral salt sodium chRead more
A reaction in which an acid and base react with each other to form salt and water is known as neutralisation reaction. During this reaction energy is evolved in the form of heat.
For example:
(i) sodium hydroxide a strong base reacts with strong acid hydrochloric acid produces neutral salt sodium chloride and water molecules.
NaOH + HCl –> NaCl + H₂O
(ii) In case of indigestion which caused due to the excess production of hydrochloric acid in the stomach resulting in acidity, to neutralise the effect of acid an antacid, Mg(OH)₂ which is basic in nature is given, thus gives relief from indigestion.
Mg(OH)₂ + 2HCl –> MgCl₂ + 2H₂O
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 lessWhat is a good fuel?
Characteristics of ideal fuel: It should be readily available. It should be economical. It should burn easily in air at a moderate rate. It should produce a large amount of heat. It should have high calorific value. It should not leave behind any undesirable substances on combustion. The fuel shouldRead more
Characteristics of ideal fuel:
- The fuel should have proper ignition temperature.
See lessWhy do we prefer a convex mirror as a rear-view mirror in vehicles?
Drivers use convex mirror as a rear-view mirror in automobiles because of the following two reasons: 1. A convex mirror always forms an erect, virtual and diminished image of an object placed anywhere in front of it. 2. A convex mirror has a wider field of view than a plane mirror of the same size.Read more
Drivers use convex mirror as a rear-view mirror in automobiles because of the following two reasons:
1. A convex mirror always forms an erect, virtual and diminished image of an object placed anywhere in front of it.
2. A convex mirror has a wider field of view than a plane mirror of the same size.
Thus convex mirrors enable the driver to view much larger traffic behind him than would be possible with a plane mirror. The main disadvantage of a convex mirror is that it does not give the correct distance and the speed of the vehicle approaching from behind.
See lessHow do we detect the smell of an agarbatti (incense stick)?
When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detects it and send this information to the fore brain in the form of electrical signals. Then, the fore brain interprets it by putting it together with the information received from other receptRead more
When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detects it and send this information to the fore brain in the form of electrical signals.
Then, the fore brain interprets it by putting it together with the information received from other receptors and also with the information already stored in the brain.
See less