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Standard XII
Chemistry
Phosphorus - Allotropic Forms
Question

Phosphourus occurs in nature in the ferm of stable phosphate. (Animal bones also contain calucium p-hosphate (58%) The important minerals are
(i) Phosphorite, $$ Ca_{2}(PO_{4})_{2} $$ (ii) Chloraptite, $$ Ca_{3}(PO_{4})_{2} CaCl_{2} $$ ,
(iii)Fluoraptite, $$ Ca_{3}(PO_{4})_{2} CaF_{2} $$
These are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do ti easily compounds of phosporus and nitrogen are used as fertilizer.
Amongs the following which is not member of apatite family

A
$$ Ca_{9}(PO_{4})_{6}.CaF_{2} $$
B
$$ Ca_{9}(PO_{4})_{6}.CaCl_{2} $$
C
$$ Ca_{9}(PO_{4})_{2}.Ca(OH)_{2} $$
D
None of these
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Solution
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Correct option is D. None of these

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Similar Questions
Q1
Phosphourus occurs in nature in the ferm of stable phosphate. (Animal bones also contain calucium p-hosphate (58%) The important minerals are
(i) Phosphorite, $$ Ca_{2}(PO_{4})_{2} $$ (ii) Chloraptite, $$ Ca_{3}(PO_{4})_{2} CaCl_{2} $$ ,
(iii)Fluoraptite, $$ Ca_{3}(PO_{4})_{2} CaF_{2} $$
These are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do ti easily compounds of phosporus and nitrogen are used as fertilizer.
Amongs the following which is not member of apatite family
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Q2
There are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do it easily. Ammonia forms large number of complexes with transition metal ions. Hybridisation easily explains the case of sigma donation capability of NH3 and PH3. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is
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Q3
There are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do it easily. Ammonia forms large number of complexes with transition metal ions. Hybridisation easily explains the case of sigma donation capability of NH3 and PH3. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is
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Q4
There are some deposits of nitrates and phosphates in the earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do it easily. Ammonia forms a large number of complexes with transition metal ions. Hybridization easily explains the case of sigma donation capability of $$NH_3$$ and $$PH_3$$ is a flammable gas and is prepared from white phosphorous.
Among the following the correct statement is:
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Q5
There are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do it easily. Ammonia forms large number of complexes with transition metal ions . Hybridisation easily explains the case of sigma donation capability of $$NH_3$$ and $$PH_3$$ is a flammable gas and is prepared from white phosphorous.
White phosphorous on reaction with $$NaOH$$ gives $$PH_3$$ as one of the products. This is a:
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