What is meant by cracking of alkanes ?
Breaking down of higher alkane into a mixture of lower alkanes and alkenes by heating or by the use of a catalyst is called cracking of alkanes.
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What are the essentials of a chemical equation ?
A chemical equation should satisfy the following conditions: 1. Qualitative Information and 2. Quantitative information.
What are the effects of carbon monoxide (CO) ?
When the fossil fuels are burnt in a limited amount of air (oxygen), the products of combustion are CO and H2O. Carbon monoxide is the most dangerous air pollutant. Carbon monoxide when inhaled combines with hemoglobin in the blood to form carboxyhaemoglobin. Carboxyhaemoglobin cannot carry oxygen.
What are the effects of lead compounds ?
Petro/diesel used in automobiles contains tetraethyl lead, (C2H5)4Pb. Tetraethyl lead acts as an anti-knocking agent. Anti-knocking agent such as, tetraethyl lead is added to petrol/diesel to make its combustion smoother.
What is meant by tetravalency of carbon ?
A carbon atom has four electrons in its outermost valence shell. So, it needs four more electrons to complete its octet. A carbon atom completes its octet only by sharing its valence electrons with other atoms.
What are the physical properties of methane ?
Methane like carbon dioxide, also traps infrared radiations (heat radiations) reflected by the earth. As a result, methane gas also contributes to the greenhouse effect. Actually, a molecule of methane traps twenty times more heat radiations than a carbon dioxide molecule.
What are the chemical properties of methane ?
Methane burns in excess of air or oxygen with a pale-blue nonluminous flame to give carbon dioxide and water. The combustion reaction is highly exothermic. Therefore, methane is an excellent fuel.
What are the uses of methane ?
As a fuel for domestic and industrial purpose because it produces large amount of heat and leaves no ash on burning. For the manufacture of carbon black. Carbon black is used for making paints, black printing ink etc.
What are the characteristics of animal shelter?
Though different animal have different types of shelter yet an animal shelter, in general should have the following characteristics: It should protect the animal from heat, cold and rain. It should be clean, dry and well ventilated. It should have arrangements for drinking water supply for animals.
Write a short note on Deficiency of vitamin C (Ascorbic Acid)
Vitamin C is called the healing vitamin of the body. It gives resistance to the body against common cold and other infections. Vitamin C plays an important role in cementing material, which holds the body cells in place, in the absorption of calcium in the body, in the body’s use of iron, in healing the wounds and in building body resistance against infections.