His paintings and calligraphies in the building of Islamic Institute in Delhi alone cover more than seven thousand square feet. These murals have disappeared and their fate is unknown. In he painted the huge mural 62'X10' in the Head Office of the State Bank of Pakistan at Karachi, titled "Treasures of Time," in which he showed the intellectual advance of man from the times of Socrates to that of lqbal and Einstein. It is a linear creation that shows a pageant of intellectuals and thinkers of the Greek era, mathematicians and chemists of the Middle East, the scholars of the European Renaissance, and the 20th-century laureates.
Example Essays Introduction Water is an essential ingredient for the existence of life as we know it.
Biochemical processes occur in aqueous environments, many of which use water. Photosynthesis is the most basic and significant chemical reaction on earth, providing the primary nutrients, directly or indirectly, for all living organisms and is the primary source of atmospheric oxygen.
Without water and its unique and unusual properties, life as we know it on earth would not exist. Water is the only substance naturally present on the earth that exists in three distinct states -solid, liquid, and gas.
Many of the unique properties in the take for granted include the three physical phases, transparency, universal solvents, density behavior and temperature, high specific heat, high heat of vaporization, viscosity, surface tension and low compressibility.
To understand why these properties exist in water and why they are essential to life on earth it is important to look at the shape and bonding patterns of the molecule because the uniqueness of water is a direct result of its shape and bonding patterns.
The shape of the water molecule In the water molecule the oxygen atom is the central atom. It has four pairs of valence electrons surrounding it. Two of these pairs are shared which form the shared pairs form covalent bonds with the hydrogen atoms.
The remaining two pairs are unshared and have a greater repulsive effect than the shared pairs. The combined repulsive effect of the two unshared electron pairs produces an H-O-H bond angle that is smaller than the H-C-H bond angle Actual measurement of the bond angle in water is If the two hydrogen nuclei were as far apart as possible the angle would be The unique bond angle in water is only Chemical bonding To understand the unusual properties of water as well as what causes them we need to have a basic understanding of the chemical bonding and the structure of the water molecule.
The shape of the water molecule is determined in part by the chemical bonding that occurs. For a brief review of chemical bonding see appendix B. The water molecule consists of the elements hydrogen and oxygen.
The chemical bonds in the water molecule are covalent bonds since the hydrogen atoms combine with the oxygen atoms in shared electron pairs. The oxygen atoms exerts a relatively strong pull on the shared electron pairs which causes the hydrogen atom to become electropositive regions and the oxygen atoms to become an electronegative region.
The water molecule is considered a polar molecule because the positive and negative regions are not evenly distributed around a center point. The water molecule due to its polar nature is electrostatically attracted to other water molecules as well as other ions in solution.
The attraction of the electropositive hydrogen atom to the electronegative oxygen atom of an adjacent water molecule is the bridging phenomenon known as hydrogen bonding and is only about 10 percent the strengths of a covalent bond. This special bond is responsible for most of the unusual properties of water: Let us look more closely at the bonding patterns of water.
Polar Covalent Bond When oxygen and hydrogen atoms are brought together the difference in their electronegativities is not sufficient to yield ions. Instead they must share a pair of electrons between them forming a covalent bond.
This results in a concentration of negative charges nearer the oxygen atom and thus further from the positively charges protons that make the nuclei of the hydrogen atoms.Water is often considered to be one of the most important resources our planet has, and rightly so.
Although people don’t need to be surrounded by water all the time, we shouldn’t forget that a human being can survive without food for about several weeks, but without water he would die in the matter of days.
The goal of Sudoku is to fill in a 9×9 grid with digits so that each column, row, and 3×3 section contain the numbers between 1 to 9. At the beginning of the game, . Return to the URDU Archive Forward to the Current URDU Discussion Baloch_sis Friday 10th of September PM Urdu phrases translated into English: Dear Urdu Learners Assalam-o .
Brittany Roberts AP bio WATER ESSAY The first thing water reminds us of is the clear liquid in our water bottles. However, water is more than a normal alphabetnyc.com is the beginning and the continual of life on earth.
Because of its many unique properties, water was able to start life on our alphabetnyc.com covers about 3/4 of .
© Urdu Essay All rights reserved: Site formazameenmazameen. Urdu, like Hindi, is a form of Hindustani. It evolved from the medieval (6th to 13th century) Apabhraṃśa register of the preceding Shauraseni language, a Middle Indo-Aryan language that is also the ancestor of other modern Indo-Aryan languages, including the Punjabi alphabetnyc.com 75% of Urdu words have their etymological roots in Sanskrit and Prakrit, and approximately 99% of Urdu verbs.