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Q. Describe Oxosalts?
In these minerals, metals are present as their oxosalts, such as carbonates, sulphates, nitrates, phosphates, borates and silicates. Some important minerals bf this group are siderite (FeC03). magnesite (MgC03), dolomite (MgC03.CaC03), cerussite (PbC03), malachite (CuC03-Cu (OH)2), calamine (ZnCO3), barytes (BaS04), gypsum (CaS04.2H20), epsomite (MgS047H20)anglesite (PbS04), soda nitre (NaN03), monazite LaPO4.CePO4.NdPO4.PrPO4. Th3 (PO4) 4)spodumene (LiAl206), zircon (ZrSi04), beryl Be3Si6018), etc. Phosphate minerals are, in general, rare and occur in low concentrations. Silicate minerals are abundant in nature. However, the extraction of metals from silicates is difficult and the cost of extraction is very high. Therefore, only the less common metals such as lithium are extracted from silicate minerals.
Q. Explain the Purity Tests of sesame oil? Purity tests for oils/fats would include analyzing the samples for the presence of sesame oil, cottonseed oil, linseed oil, argemone
Silver salt method for acids - Chemical methods It is based upon the fact that silver salt of an organic acid on heating provides residue of metallic silver.
i) Electrophillic substitution in case of aromatic amines takes place more readily than benzene. ii) Nitro compounds have higher boiling points than hydrocarbons having almost s
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a) Write the following about protein synthesis: (i) Name the location where protein synthesis occurs. (ii) How do 64 codons code for only 20 amino acids? (iii) Which of t
The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom: (1) He + (n= 2) (2) Li 2+ ( n= 2) (3) Li 2
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