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the probability that a person will get an electric contract is 25 and the contract that he will not get plumbing contract is 47.if the
let xn be a sequence of distinct real numbers. define e l l is a subsequential limit of xn. prove e is
dk is a year old female who was born after a normal pregnancy and delivery. at 17 months of age dk showed signs of speech delay increased
ct is a 3 year old female who develops signs of hypoglycemia in the early morning unless she is fed during the night. ct eats balanced meals for
polarity and salvation a solvent is a liquid medium in which dissolved are known as solutes. solvents are useful for storing species that would
covalent bondpurely electrostatic attractions between ions are nondirectional but with increasing covalent character the directional properties of
ionic radii the experimentally calculated anion-cation distances in highly ionic solids have to be interpreted on the assumption that each and
coordination number and geometry binary compounds are ones with two different elements present. simple crystal structures can be classed as ones
crystals and glasses unlike a complex ion or molecule which is a finite often small assembly of atoms a solid has no fixed shape and size but
x gram of metal reacts with chlorine to form y gram of metal chloride.calculate equivalent mass of
1.xy1178 2.xy-1178 3.x-y-1178 4.-x-y-1178 question what is the effect of switching the plus sign to minus sign on the
a straight line ab on the side of a hill is inclined at 15.0176 to the horizontal. the axis of a tunnel 486ft. long is inclined 28.6176 below the
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