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let a 2 cm b 6 cm and angle a 60deg. how many solutions are there for angle b we must calculate b sin a. if it is less than a there
1. the length of a rectangle is 2 times its width. the area of the rectangle is 72 square inches. find the
q. explain scale formation and sludge formation in boilers. how are they formed? ansboilers are used for steam generation. when hard water
q. analysis of water gave the following results h2so4 196mgl mgso4 24mgl caso4 272mgl and nacl 25mgl. water is to be supplied to the town of the
q. ca2 20 ppm mg2 25 ppm co2 30 ppm hco-3 150 k 10 ppm. calculate the lime 87 pure and soda 91 pure required softening 1 million litters of
carry over in steam boiler the phenomenon of carrying of water along with impurities by steam is called carry over. this is mainly due to priming and
caustic embrittlement caustic embrittlement is a type of boiler corrosion caused by using highly alkaline water in the boiler. during softening
q. how is true exhausted zeolite bed regenerated? give the merits and demerits of zeolite process.
q. describe lime-soda method for softening of hard water. discuss the advantages of the process and the chemistry involved in
q. what are boiler troubles? discuss their consequences?sol. boiler feed water water for steam making water is very important engineering material
q. what is softening of water? describe deionization method of water softening with diagram.ans. softening of water the process of removing the
symmetry is a property of molecules having more than one atom of the same kind with equal bond lengths andor bond angles. as like the high symmetry
a single covalent bond is build when two atoms share a pair of electrons. triple and double bonds can be formed when two or three such pairs are
it is important to differentiate the stoichiometric or empirical formula of a molecular substance from its molecular formula. the former expresses
the most important classification of elements is that of non-metallic versus metallic. metallic elements form solids that are good conductors of
q. write short notes on fabrication of rubber objects.sol. fabrication of rubber in the row condition rubber is composed of molecules of great length
types of polymerization sol. types of polymerization polymerization is a process in which the joining together of many small molecules to form
q. write short note on electrically conducting polymers.ans. electrically conducting polymers many synthetic organic polymers have been found to
q. explain vulcanization of rubber is necessary.ans. importance of vulcanization of
short note on synthetic rubber.sol. synthetic rubber main types of synthetic
polyethylene polyethylene are formed by polymerization of ethylene under high pressure and at moderately high temperature. the resulting polymers are
electron configurations are governed by a limitation called as the pauli exclusion principle no two electrons can have the same value for all
terylenepreparation terylene is prepared by a polyconensation reaction between a dicarboxylic acid and a idol.properties a fully aliphatic
neoprene gr or polychloroprene or dupepreparation neoprene is prepared by the free radical polymerisation of chloroprene in an emulsion system.
nitrite rubbers gr-a or buna-n or nbr nitrite rubber is prepared by the copolymerization of butadiene and acrylonitrile in emulsion