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The covalent bond produced by the unequal sharing of electrons among the two atoms is known as polar covalent bond.
The covalency of nitrogen in HNO 3 is: (1) 0 (2) 3 (3) 4 (4) 5 Ans: 5
priming and foaming
Q. Describe Lime-soda method for softening of hard water. Discuss the advantages of the process and the chemistry involved in it.
Q. Explain scale formation and sludge formation in boilers. How are they formed? Ans Boilers are used for steam generation. When hard water is evaporated, progressively
Evidence in favor of Kekule's structure 1. Benzene combines along with 3 molecules of hydrogen or three molecules of chlorine. It also collides along with 3 atoms of ozone to
The de-Broglie wavelength of a particle with mass 1gm and velocity 100m/ sec is: (1) 6.63 x 10 -53 m (2) 6.63 x 10 -34 m (3
1. A sample of water contains: suspended matter = 100 mg; Ca(NO3)2 = 16.4 mg/L; MgSO4 = 24 mg/L; MgCl2 = 19 mg/L; NaOH = 40 mg/L and KOH = 56 mg/L. Calculate temporary, permanent a
Q. Importance of Moisture content of the flour? Moisture content of the flour is an important parameter and does not remain the same throughout the period of storage. As the fo
Maximum electrons in a d -orbital are: (1) 2 (2) 10 (3) 6 (4) 14 Ans: 10
short note on borazine
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