Phosphoric Fertilisers

Q. 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 $N{H}_3$ and $P{H}_3$. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is

1. Phosphates have no biological significance in humans
2. Between nitrates and phosphates, phosphates are less abundant in earth's crust
3. Between nitrates and phosphates, nitrates are less abundant in earth's crust
4. Oxidation of nitrates is possible in soil

Q. Phosphate containing fertilisers cause water pollution. Addition of such compounds in water bodies causes

1. Enhanced growth of algae
   
2. Decrease in amount of dissolved oxygen in water
   
3. Deposition of calcium phosphate
   
4. Increase in fish population

Q.

Write the uses of Nitrogen and chlorine.

Q. Which of the following statement is incorrect regarding occurance of phosphorus?

1. Phosphorus occurs in minerals ​of the apatite family, ​
   $C{a}_9(P{O}_4{)}_6.Ca{X}_2(X=F,Cl,orOH)$​
2. Phosphorus is an essential constituent ​of animal and plant matter
3. Both the statements are incorrect
4. None of the above

Q.

69) What are fertilizers ? How are they classified ? Explain the classification of fertilizers with an example?

Q. Which chemical substance used in fertilizers can contaminate groundwater when carried to bodies of water by runoff or seepage?

1. Nitrates
2. Carbon dioxide
3. DDT
4. Lead

Q.

if quantity of BOD increases then

a- quantity od pollutant increases in water

b- quantity of water pollutant decreases

c- mass of organic matter increases

d- purity of water increases

Q. 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 $N{H}_3$ and $P{H}_3$. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is

1. Oxidation of nitrates is possible in soil
2. Phosphates have no biological significance in humans
3. Between nitrates and phosphates, phosphates are less abundant in earth's crust
4. Between nitrates and phosphates, nitrates are less abundant in earth's crust

Q. Phosphate containing fertilisers cause water pollution. Addition of such compounds in water bodies causes

1. Enhanced growth of algae
   
2. Decrease in amount of dissolved oxygen in water
   
3. Deposition of calcium phosphate
   
4. Increase in fish population

Q. What are the by-product of fertilizer industries? How do they affect the environment?

Q. 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 $N{H}_3$ and $P{H}_3$. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is

1. Phosphates have no biological significance in humans
2. Between nitrates and phosphates, phosphates are less abundant in earth's crust
3. Between nitrates and phosphates, nitrates are less abundant in earth's crust
4. Oxidation of nitrates is possible in soil

Q. Phosphate containing fertilisers cause water pollution. Addition of such compounds in water bodies causes

1. Enhanced growth of algae
   
2. Decrease in amount of dissolved oxygen in water
   
3. Deposition of calcium phosphate
   
4. Increase in fish population

Q.

Name any two kind of fertilizers whose excessive presence in water bodies results in algal growth. Define eutrophication. What is the consequences of eutrophication ( 5 Marks )

Q. 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 $N{H}_3$ and $P{H}_3$. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is

1. Phosphates have no biological significance in humans
2. Between nitrates and phosphates, phosphates are less abundant in earth's crust
3. Between nitrates and phosphates, nitrates are less abundant in earth's crust
4. Oxidation of nitrates is possible in soil

Q.

Which of the following are fertilizers?

1. Mono-ammonium hydrogen phosphate

2. Superphosphate

3. Triple superphosphate

4. All of the above

Q. Which of the following statements is/are correct?

1. Aluminium wire is used in Beilstein test
2. Nitrogen gas is quantitatively estimated in Dumas method
3. In Kjeldahl's method, organic compound is reacted with conc. $H_{2}S{O}_4.K_{2}S{O}_4$ and $N{a}_{2}S{O}_4$ are also added
4. All organic compounds contain both C and H

Q. Addition of phosphate fertilisers to water bodies causes :

1. deposition of calcium phosphate
2. enhanced growth of algae
3. increase in fish population
4. increase in amount of dissolved oxygen in water

Q.

Which of the following are fertilizers?

1. Mono-ammonium hydrogen phosphate

2. Superphosphate

3. Triple superphosphate

4. All of the above

Q.

Which of the following are fertilizers?

1. Superphosphate

2. All of the above

3. Triple superphosphate

4. Mono-ammonium hydrogen phosphate

Q. Which of the following nitrates are water soluble?

1. $NaN{O}_3$
2. $Hg{\left(N{O}_3\right)}_2$
3. $LiN{O}_3$
4. $AgN{O}_3$