Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Borosilicate glass: in this boric anhydride is used in place of lime. This glass generally contains 75-81% silica, 10-13.5% B2O3, 4.5-6% Na2O and 2-5% Al2O3. Sometimes Zno may be added to improve the properties. Its two outstanding proper is are high chemical resistance and low coefficient of thermal expansion which make it most suitable for laboratory and medical ware, oven and table ware and industries glass ware. Borosilicate glass may contain a small quantity of fluorine which is used to lower the viscosity. Calcium phosphate may also be included in borosilicate composition to produce optimization during forming of the glass. Pyrex is an example of such glasses known for their low coefficient of expansion. These can be made by fusing a mixture of sand, lime, borax and alkali metal carbonates.
Q. Simple molecular orbital description? we can give a simple molecular orbital description of bonding in B 2 H 6 as follows. Each boron atom is sp 3 hybrid giving four sp 3
Q. Discuss the classification of polymers. OR How are polymers classified? Explain with suitable examples. Ans. Polymers are classified on th
In the following which substance will have highest boiling point: (1) He (2) CsF (3) NH 3 (4) CHCl 3 Ans: CsF
Q. Illustrate Metallic Bonding? Ans. A metal is crystalline because it has a regularly repeating, closely packed structure. In a metal, though, this closely packed structu
1. Write an easy on the classification of Phylum Protozoa, a large phylum comprising approximately 50,000 species. (10marks)
The mass of CaCl2 (molar mass= 111.0) required to prepare 75.00 milliliters of a 2.000 molar solution of this salt is?
Q. Explain about Magnetic Separation ? This process is based on the difference in magnetic properties of minerals. If the ore but not the gangue is attracted by a magnetic fiel
seawater contains 0.75g of Fe+3 per kilogram of water. What is the concentration of Fe_3 in ppm?
how to select a parent chain
The magnetic quantum number of valence electron of sodium (Na) is: (1) 3 (2) 2 (3) 1 (4) 0 Ans: 0
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd