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Q. why is sodium aluminates is a better coagulates then ferrous sulphates or alum? Ans. Sodium aluminates (NaAlO 2 ): It is better coagulant than FeSO 4 and alum because i
If an electron has spin quantum number of +1/2 and a magnetic quantum number of -1 , it cannot be presented in an: (1) d -orbital (2) f -orbital (3) p -orbital (4)s-
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Which one of the following configuration represents a noble gas: (1) 1s 2 , 2s 2 , 2p 6 , 3s 2 , (2)1s 2, 2s 2, 2p 6 , 3s 1 (3) 1s 2 , 2s 2 , 2p 6 ,
A bond with maximum covalent character between non-metallic elements is formed: (1) Between identical atoms (2) Between chemically similar atoms (3) Between atoms of wide
Explain Cellobiose Cellobiose is a dimer of D-glucose, it is hydrolyzed by aqueous acid into two molar equivalents of D- glucose.
If the water molecules in 1g of water were uniformly distributed on earth surface , how many such water molecules would there be in 1 cm^2 of earth? Solution) No. of molecules in
The f-block elements contains of two series of inner transition elements i.e. lanthanoids (the fourteen elements subsequent lanthanum) and actinoids (the fourteen elements subseque
Post-harvest handling of fresh produce Fruits and vegetables because of their high moisture content are extremely susceptible to deteriorate, especially under tropical c
(i) Use valence shell electron pair repulsion theory (VSEPR) to predict the shape of the molecule comprising oxygen, nitrogen and fluorine atoms, which has the formula ONF, and whe
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