natural rubber

Let us learn about natural rubber.

Raw natural rubber has low tensile strength & it is abrasion resistant. Raw natural rubber absorbs large quantities of water. 0.915 is its specific gravity. Natural rubber is insoluble in alcohol, water, acetone, dilute acids & alkalis. Natural rubber is soluble in ether, carbon disulphide, carbon tetrachloride, petrol and turpentine and other hydrocarbons like benzene, toluene, gasoline & lubricating oils. Pure rubber is a amorphous solid, transparent, which on stretching or prolonged cooling becomes crystalline. Natural rubber is basically a thermoplastic but with vulcanization Natural rubber turns to thermoset. Plantation rubber also called Natural rubber

In our next blog we shall learn about alkanols I hope the above explanation was useful.Keep reading and leave your comments.

reactivity of elements

Let us learn about reactivity of elements.

Reactivity of elements table-non metals

The reactivity of non-metals decreases down the series. Fluorine is the most excited or we can say the most reactive non metal where as Phosphorous is the least reactive one. The non metals above in the series can exclude or displace the non-metals below in the series.

Example for reactivity of elements table-non metals: 2KI + Cl₂ → 2KCl + I₂

For metals in a granted period reactivity is determined by the number of electrons that must be transferred to a nonmetal. Those metals with only one outer shell electron will be more reactive than any other metals with two or more electrons.

Reactivity of elements table- metals

The metals are arranged in subsiding (decreasing) order of their reactivity. The most re-active element is at the top level, it is Sodium (Na) The least reactive element is at the bottom level, it is Gold (Au). Hydrogen is a non-metal but it is included in this series as it can form a positive ion by losing an electron. Metals above hydrogen can displace metals beneath (bottom) it from the solutions of their salts.

Example for reactivity of elements table- metals: - Zn + CuSO₄ → ZnSO₄ + Cu

In our next blog we shall learn about deceleration formula I hope the above explanation was useful.Keep reading and leave your comments.

evaporation rate

Let us learn about evaporation rate

What happens when you hang your cloths to dry? What happens when you heat water more than 100 degree? why does the quantity of lake water reduce during summer?

Temperature, surface area, rate of airflow, etc are the factors effecting evaporation.

Evaporation is a process of converting liquid state molecule into gases state.

evaporation rate depends on the amount of the intermolecular forces and the rate at which heat is supplied to the liquid.

In our next blog we shall learn about hydrogen iodide I hope the above explanation was useful.Keep reading and leave your comments.

advantages of wind power

Let us learn about advantages of wind power

1. It is ample and so is widely available anywhere in the world. It is available free & without using modern technique it can be captured.
2. It is very cheap. villages can make good use of range of wind turbines
3. It doesn’t harm ecosystem & doesn’t cause pollution.
4. It is also a permanent type of energy.
5. It uses a renewable source of energy.

In our next blog we shall learn about radian to degree I hope the above explanation was useful.Keep reading and leave your comments.

properties of metals and nonmetals

Let us learn about properties of metals and nonmetals.

A metal is a chemical element which is a good conductor of both heat & electricity and forms cations and ionic bonds with non-metals

Many Precious metals on the earth are getting exhausted and there will be no metals left on earth soon. Day-by-day mines are getting deeper and extraction of precious metals is getting exhausted.

In our next blog we shall learn about reversible reactions I hope the above explanation was useful.Keep reading and leave your comments.

uses of nitrogen

Hi friends!!!

Can you tell me what is air?

Air is a mixture of many gases like nitrogen, oxygen, argon, carbon dioxide etc.


Let us learn about uses of nitrogen.

Nitrogen can be found in both animals & plants.

Nitrogen is used in light bulbs in place of argon.

Nitrogen is used to pack foods because it contains oxidation of foods to maintain their freshness.

Nitrogen is essential in the manufacturing of electronic parts like, transistors, integrated circuits and diodes.

Nitrogen is very important for pollution control

Nitrogen is used scientific research. Etc

In our next blog we shall learn about reversible reaction I hope the above explanation was useful.Keep reading and leave your comments.

formula for mass

Let us learn about Mass.

The mass number (A), also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus

A mass formula is an equation or set of equations in physics which attempts to predict the mass or mass ratios of the subatomic particles.

formula for mass 1 u= mass of ¹²C₆ atom / 12

In our next blog we shall learn about mass moment of inertia I hope the above explanation was useful.Keep reading and leave your comments.