Why is Group V of qualitative analysis, sufficient NH4 OH solution be added before adding (NH4)2 CO3 solution?
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FeSO4 solution mixed with (NH4)2SO4 solution in 1 : 1 molar ratio gives the test of Fe^2+ ion but CuSO4 solution mixed
i. 1 : 1 molar mixture of FeSO4 and (NH4)2SO4 forms a double salt, FeSO4.(NH4)2SO4.6H2O (Mohr’s salt) which exists only in solid state. In aqueous solution, it dissociates into ions...
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Give the formula of each of the following coordination entities: (i) Co3^+ ion is bound to one Cl^–, one NH3 molecule
(i) [Co(NH3)Cl(en)2]2+ : Amminechloridobis (ethane-1, 2-diamine)-cobalt(III) ion Magnetic behaviour : Diamagnetic (ii) [Ni(H2O)2(OX)2]2– : Diaquadioxalatonickelate (II) ion Magnetic behaviour : Paramagnetic
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What is the function of adding NH4 OH in group file?
It convert ammonium bicarbonate into ammonium carbonate.
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Give reason for the following: Zinc is not precipitated as Zn (OH)2 on adding NH4 OH to a zinc salt solution containing NH4Cl.
NH4CL suppresses the ionization of NH4OH due to common ion effect. Hence, the concentration of OH- decreases such that the ionic product [Zn2+] [OH-]2 does not exceed solubility product. Hence,...
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Some species of plants are insectivorous. Why ? (a) Their growth in shady and dark places does not allow them to undertake sufficient photosynthesis
(b) Insectivorous plants prey insects because most of the insectivorous plants grow in those area where there is deficiet of nitrogen in nutrients so they catch insect to fulfil its...
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Why is nitric acid is added to Sodium extract before adding Silver nitrate for testing halogens?
Nitric acid is added to decompose NaCN and Na2S NaCN + HNO3 → NaNO3 + HCN Na2S + 2HNO3 → 2NaNO3 + H2S H2S and HCN are gases and are escaped from the...
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Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?
Sodium extract is boiled with nitric acid to decompose NaCN and Na2S, if present, otherwise these NaCN + HNO3 NaNO3 + HCN Na2S + 2HNO3 ...
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Assertion: NO3^- and CO3^2- ion both are triangular planar
(a) If both assertion and reason are true, and reason is the true explanation of the assertion.
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Why is the State unable to deliver "all that is needed"? 1. It does not have sufficient bureaucracy.
(b) State does not promote inclusive growth as stated in 2nd para ‘‘ the aim ... realistically deliver.’’
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Why is diffusion not sufficient to meet the oxygen requirements of all the cells in multicellular organisms ?
All the cells in multicellular organisms may not be in direct contact with the surrounding environment. Thus, simple diffusion will not meet the O2 requirements of all the cells.
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