Why is Ammonia a good complexing agent?

Why is Ammonia a good complexing agent?
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Answer :

Ans: Because of lone pair of electrons on N. 
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Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Description : Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Last Answer : Ans: i) Hydrogen bond is found in H2O but not in H2S.  ii) Hydrogen bond is found in NH3 but not in PH3.  iii) Because they have low ionization energy.

How is ammonia prepared? Write chemical reaction involved in the Haber’s process.

Description : How is ammonia prepared? Write chemical reaction involved in the Haber’s process.

Last Answer : i) Ammonia is prepared by the combination of hydrogen and nitrogen in the ratio of 3:1.  ii) The used catalyst is iron oxide. The promotors are potassium and aluminium oxides.  iii) The required conditions are high pressure and moderate temperature.  N2 + 3H2 → 2NH3

Write shape of following molecules: a) Ammonia b) Phosphorous Pentachloride

Description : Write shape of following molecules: a) Ammonia b) Phosphorous Pentachloride

Last Answer : Ans: a) Pyramidal b) Trigonal bipyramidal

Ammonia is water soluble. Why?

Description : Ammonia is water soluble. Why?

Last Answer : Ans: It forms hydrogen bond with water. 

Why is phosphine weaker base than Ammonia?

Description : Why is phosphine weaker base than Ammonia?

Last Answer : Ans: P is bigger than N, therefore lone pair of electrons are less available on P than N. 

Why is fluorine stronger Oxidising agent ?

Description : Why is fluorine stronger Oxidising agent ?

Last Answer : Ans: Due to (a) Low enthalpy of dissociation (b) high enthalpy of Hydration of F-

Ammonia is a good complexing agent. Explain.

Description : Ammonia is a good complexing agent. Explain.

Last Answer : Ammonia is a good complexing agent. Explain.

Which aerosol deplete ozone layer ?

Description : Which aerosol deplete ozone layer ?

Last Answer : Ans C.F.C  

Write the formula of tear gas .

Description : Write the formula of tear gas . 

Last Answer : Ans : CCl3 NO2 

Why is helium used in diving apparatus ?

Description : Why is helium used in diving apparatus ?

Last Answer : Ans: Because heliun is very low solubility in blood  

Why H3 PO3 is dibasic and H3PO4 is tribasic ?

Description : Why H3 PO3 is dibasic and H3PO4 is tribasic ?

Last Answer : Ans In H3PO3 only two replacable hydrogen but inH3PO4 , three hydrogens are replacable .  

Are all the five bonds in PCl5 molecule equivalent ?

Description : Are all the five bonds in PCl5 molecule equivalent ? 

Last Answer : Ans – PCl5 has a trigonal bipyramidal structure and the three equatorial p-cl bonds are equivalent . while trhe two axial bonds are different and longer than equatorial bonds. 

How is the presence of SO2 detected ?

Description : How is the presence of SO2 detected ?

Last Answer : Ans : 1. It has pungent characteristic smell . 2. It decolourises KMn O4 solution 3. It turns acidified K2 Cr2 O7 green 

Halogens have maximum negative electron gain enthalpy in the respective periods in the P. T Why ?

Description : Halogens have maximum negative electron gain enthalpy in the respective periods in the P. T Why ? 

Last Answer : Ans Due to smallest size and high effective nuclear charge , readily accept one electron  to acquire noble gas electronic configuration  

Which forms of Sulphur show paramagnetic behaviour ?

Description : Which forms of Sulphur show paramagnetic behaviour ?

Last Answer : Ans : In Vapour State sulphurPartly exists as S2 molecule which has two unpaired electrons in the * Orbitals hence exhibit paramagnetic 

Find hybridization and shape i) XeF2 ii) XeO3 iii) XeF4

Description : Find hybridization and shape i) XeF2 ii) XeO3 iii) XeF4

Last Answer : Ans: i) sp3d, Linear ii) sp3, Pyramidal iii) sp3d2 , Square planar

Nitrogen shows anomalous behaviour in the group. Why?

Description : Nitrogen shows anomalous behaviour in the group. Why?

Last Answer : Ans: i) Small size ii) High electro negativity iii) Absence of vacant d-orbital.

Give reasons: a) Phosphorous pentachloride is unstable. b) Phosphorous trichloride fumes in moisture.

Description : Give reasons: a) Phosphorous pentachloride is unstable. b) Phosphorous trichloride fumes in moisture.

Last Answer : Ans: a) Because of two longer axial bonds. b) Because it reacts with water and forms hydrochloric acid. 

Ortho phosphoric acid is triprotic but phosphoric acid is diprotic. Why?

Description : Ortho phosphoric acid is triprotic but phosphoric acid is diprotic. Why?

Last Answer : Ans: Because of their structures ortho phosphoric acid and phosphoric acid have three and two ionisable hydrogen.

Why is Nitrogen relatively inert?

Description : Why is Nitrogen relatively inert?

Last Answer : Ans: Because of a triple bond with high bond energy. 

Why Nitrogen is a gas whereas Phosphorous is a solid?

Description : Why Nitrogen is a gas whereas Phosphorous is a solid?

Last Answer : Ans: Nitrogen molecules have less Vander Waal’s forces of attraction whereas molecular phosphorous has more Vander Waal’s forces of attraction.

A single DNA molecule condensed into a compact structure in vivo by complexing with accessory histones or histone-like proteins.

Description : A single DNA molecule condensed into a compact structure in vivo by complexing with accessory histones or histone-like proteins.

Last Answer : Ans. Chromosome

The gut controls the entry of ingested iron in the body by: A. Regulating the availability of apoferritin which acts as the carrier of iron across the mucosal cell B. Regulating the turnover of apoferritin-ferritin interconversion in the mucosal cell C. Complexing excess iron to form ferritin which remains stored in the mucosal cell and is shed off D. Regulating the number of transferrin receptors on the mucosal cell

Description : The gut controls the entry of ingested iron in the body by: A. Regulating the availability of apoferritin which acts as the carrier of iron across the mucosal cell B. Regulating the turnover of ... mucosal cell and is shed off D. Regulating the number of transferrin receptors on the mucosal cell

Last Answer : C. Complexing excess iron to form ferritin which remains stored in the mucosal cell and is shed off

Tricyclic antidepressants can alter the oral absorption of many drugs by: A. Complexing with the other drug in the intestinal lumen B. Altering gut motility C. Altering gut flora D. Damaging gut mucosa

Description : Tricyclic antidepressants can alter the oral absorption of many drugs by: A. Complexing with the other drug in the intestinal lumen B. Altering gut motility C. Altering gut flora D. Damaging gut mucosa

Last Answer : B. Altering gut motility

Tricyclic antidepressants can alter the oral absorption of many drugs by: A. Complexing with the other drug in the intestinal lumen B. Altering gut motility C. Altering gut flora D. Damaging gut mucosa

Description : Tricyclic antidepressants can alter the oral absorption of many drugs by: A. Complexing with the other drug in the intestinal lumen B. Altering gut motility C. Altering gut flora D. Damaging gut mucosa

Last Answer : B. Altering gut motility

State the type of chemical reactions and chemical equations that take place in the following: (i) Magnesium wire is burnt in air. (ii) Electric current is passed through water. (iii) Ammonia and hydrogen chloride gases’are mixed. -Chemistry

Description : State the type of chemical reactions and chemical equations that take place in the following: (i) Magnesium wire is burnt in air. (ii) Electric current is passed through water. (iii) Ammonia and hydrogen chloride gases’are mixed. -Chemistry

Last Answer : This is the Answer:

What is Ammonia ? Write the use of ammonia ?

Description : What is Ammonia ? Write the use of ammonia ?

Last Answer : Ammonia is a chemical compound composed mainly of nitrogen and hydrogen. Whose chemical signal is NH3 . It is a gas with a pungent odor. Use of ammonia 1. In the preservation of perishable goods , II. Soda , medicine and rayon industry , 3. As explosives , 4. Used as a reagent in the laboratory.

What is the amount of bonding angle in ammonia molecule ?

Description : What is the amount of bonding angle in ammonia molecule ?

Last Answer : See this link with details http://bn.m.wikipedia.org/wiki/Amonia

What is the signal of ammonia ?

Description : What is the signal of ammonia ?

Last Answer : Ammonia signal NH3.

(3) Conversion of ammonia to nitrites Explanation: Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. The oxidation of ammonia into nitrite is performed by two groups of organisms, ammonia-oxidizing bacteria AOB) and ammonia-oxidizing archaea (AOA). Nitrification is an important step in the nitrogen cycle in soil.

Description : (3) Conversion of ammonia to nitrites Explanation: Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. The oxidation of ammonia ... -oxidizing archaea (AOA). Nitrification is an important step in the nitrogen cycle in soil.

Last Answer : Acid rain is caused due to pollution of atmosphere by – (1) oxides of carbon and nitrogen (2) oxides of nitrogen and sulphur (3) oxides of nitrogen and phosphorous (4) None of these

Nitrogen fixation is a process of - (1) Assimilation of nitrate (2) Utilisation of nitrogen gas (3) Conversion of organic nitrogen to proteins (4) Conversion of molecular nitrogen to ammonia

Description : Nitrogen fixation is a process of - (1) Assimilation of nitrate (2) Utilisation of nitrogen gas (3) Conversion of organic nitrogen to proteins (4) Conversion of molecular nitrogen to ammonia

Last Answer : (4) Conversion of molecular nitrogen to ammonia Explanation: Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia (NH3) or other molecules available ... plants as nutrients. The conversion of organic nitrogen to proteins is achieved in Nitrogen cycle.

Which one of the following group of gases contribute to the "Green House Effect"? (1) Carbon dioxide and Methane (2) Ammonia and Ozone (3) Carbon monoxide and Sulphur dioxide (4) Carbon tetrailouride and Nitrous oxide

Description : Which one of the following group of gases contribute to the "Green House Effect"? (1) Carbon dioxide and Methane (2) Ammonia and Ozone (3) Carbon monoxide and Sulphur dioxide (4) Carbon tetrailouride and Nitrous oxide

Last Answer : (1) Carbon dioxide and Methane Explanation: The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone. When ranked by their direct contribution to the greenhouse ... 72 %, Carbon Dioxide: 9- 26 %, Methane: 4-9 % and Ozone: 3-7 %.

One property of ammonia is – (1) It is insoluble in water (2) it is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue

Description : One property of ammonia is – (1) It is insoluble in water (2) it is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue

Last Answer : (4) Its aqueous solution turns red litmus blue Explanation: The main use of litmus is to test whether a solution is acidic or basic. For instance, ammonia gas, which is alkaline, colours the red litmus paper blue.

When Hydrogen starts burning in air, it produces? (1) Ammonia (2) Water (3) Methane (4) Carbonic Acid

Description : When Hydrogen starts burning in air, it produces? (1) Ammonia (2) Water (3) Methane (4) Carbonic Acid

Last Answer : (2) Water Explanation: Hydrogen burns in oxygen or air to form water. 2H2 + O2 = 2H2O

Which of the following molecules or ions involved in the Nitrogen Cycle do not contain oxygen atom? (1) Nitrite (2) Ammonia (3) Nitrate (4) Laughing gas

Description : Which of the following molecules or ions involved in the Nitrogen Cycle do not contain oxygen atom? (1) Nitrite (2) Ammonia (3) Nitrate (4) Laughing gas

Last Answer : (2) Ammonia

The pair of compounds used as anesthetic in medicines – (1) Ether, Ammonia (2) Nitrous oxide, Chloroform (3) Chloroform, Nitrogen dioxide (4) Nitrogen dioxide, ether

Description : The pair of compounds used as anesthetic in medicines – (1) Ether, Ammonia (2) Nitrous oxide, Chloroform (3) Chloroform, Nitrogen dioxide (4) Nitrogen dioxide, ether

Last Answer : (2) Nitrous oxide, Chloroform Explanation: Nitrous oxide is one of the more well-known anesthetic gases, and has been in use for around 200 years. Unlike some other anesthetics, this compound ... than ether. Its use as an anaesthetic decreased with increased experience and knowledge of its dangers.

The contact process is involved in the manufacture of - (1) Nitric acid (2) Sulphuric acid (3) Ammonia (4) Caustic soda

Description : The contact process is involved in the manufacture of - (1) Nitric acid (2) Sulphuric acid (3) Ammonia (4) Caustic soda

Last Answer : (2) Sulphuric acid Explanation: It is also a central substance in the chemical industry. It is widely produced by contact process. Now days, sulphuric acid is prepared by contact process all over ... process is based upon the catalytic oxidation of sulfur dioxide (SO2) to sulfur trioxide (SO3).

Biofertilizers convert nitrogen to (1) nitrates (2) ammonia (3) nitrogenase (4) amino acids

Description : Biofertilizers convert nitrogen to (1) nitrates (2) ammonia (3) nitrogenase (4) amino acids

Last Answer : (2) ammonia Explanation: Bio-fertilizers are microorganisms which bring about nutrient enrichment of soil by enhancing the availability of nutrients to crops. The micro-organisms which act as bio ... bacteria convert free nitrogen to ammonia, which the host plant utilizes for its development.

If the sewage is fully oxidized, the nitrogen is in the form of – (1) Nitrites (2) Ammonia (3) Nitramines (4) Nitrates

Description : If the sewage is fully oxidized, the nitrogen is in the form of – (1) Nitrites (2) Ammonia (3) Nitramines (4) Nitrates

Last Answer : (4) Nitrates Explanation: Oxidized forms of nitrogen include nitrite (NO2) and nitrate (NO3). Nitrogen mainly occurs in wastewater in this form. Because nitrite is easily oxidized to nitrate, nitrate is the compound predominantly found in groundwater and surface waters.

Which of the following is the strongest base in aqueous solution? (1) Diethylamine (2) Triethylamine (3) Ammonia (4) Ethylamine

Description : Which of the following is the strongest base in aqueous solution? (1) Diethylamine (2) Triethylamine (3) Ammonia (4) Ethylamine

Last Answer : (1) Diethylamine Explanation: Amines are organic derivatives of ammonia, in which one, two, or all three of the hydrogens of ammonia are replaced by organic groups. All aliphatic primary amines are stronger bases than ammonia.

An important green-house gas other than methane being produced from the agricultural fields is– (1) Nitrous oxide (2) Ammonia (3) Sulphur dioxide (4) Arsine

Description : An important green-house gas other than methane being produced from the agricultural fields is– (1) Nitrous oxide (2) Ammonia (3) Sulphur dioxide (4) Arsine

Last Answer : (1) Nitrous oxide Explanation: Nitrous oxide (N2O) and methane (CH4) are the two major greenhouse gasses (GHG) emitted by agricultural activities. N2O accounts for around 8% of the warming impact of current human GHG emissions.

Nitrification is the biological process of converting – (1) N9 into nitrate (2) N2 into nitrite (3) Ammonia into nitrite (4) Ammonia into N2

Description : Nitrification is the biological process of converting – (1) N9 into nitrate (2) N2 into nitrite (3) Ammonia into nitrite (4) Ammonia into N2

Last Answer : (3) Ammonia into nitrite Explanation: Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. The transformation of ammonia ... limiting step of nitrification. Nitrification is an important step in the nitrogen cycle in soil.

The chief source for the production of nitrogeneous fertilizers is : (1) Ammonia (2) Nitric acid (3) Nitrogen (4) Nitrogen dioxide

Description : The chief source for the production of nitrogeneous fertilizers is : (1) Ammonia (2) Nitric acid (3) Nitrogen (4) Nitrogen dioxide

Last Answer : (1) Ammonia Explanation: Nitrogen fertilizers are often made using the Haber-Bosch process which uses natural gas for the hydrogen and nitrogen gas from the air at an elevated temperature and ... is used as a feedstock for other nitrogen fertilizers, such as anhydrous ammonium nitrate and urea.

Atomic mass of Nitrogen is 14 and that of Hydrogen is 1. What will be the molecular mass of Ammonia? (1) 18 (2) 17 (3) 16 (4) 15

Description : Atomic mass of Nitrogen is 14 and that of Hydrogen is 1. What will be the molecular mass of Ammonia? (1) 18 (2) 17 (3) 16 (4) 15

Last Answer : (2) 17 Explanation: Ammonia (NH3) is composed of one atom of Nitrogen and three Hydrogen atoms. This means that its molar mass of ammonia will be the sum of the molar mass of one nitrogen atom and three times the molar mass of a hydrogen atom.

Dry ice is – (1) solid ammonia (2) solid sulphur dioxide (3) dry carbon dioxide gas (4) solid carbon dioxide

Description : Dry ice is – (1) solid ammonia (2) solid sulphur dioxide (3) dry carbon dioxide gas (4) solid carbon dioxide

Last Answer : (4) solid carbon dioxide Explanation: Dry ice is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and ... . It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.

Tear gas used by the police to disperse the mob contains - (1) Carbon dioxide (2) Chlorine (3) Ammonia (4) Hydrogen sulphide

Description : Tear gas used by the police to disperse the mob contains - (1) Carbon dioxide (2) Chlorine (3) Ammonia (4) Hydrogen sulphide

Last Answer : (2) Chlorine Explanation: Tear gas, formally known as a lachrymatory agent, is a possibly lethal chemical weapon that stimulates the corneal nerves in the eyes to cause tears, pain, and even blindness.

Which of the following is a super-cooled liquid? (1) Ice-cream (2) Ammonia (3) Glass (4) Wood

Description : Which of the following is a super-cooled liquid? (1) Ice-cream (2) Ammonia (3) Glass (4) Wood

Last Answer : (3) Glass Explanation: Glass is considered to be a supercooled liquid due to its lack of a first-order phase transition where certain thermodynamic variables such as volume, entropy ... where the intensive thermodynamic variables such as the thermal expansivity and heat capacity are discontinuous.

0.257g of organic substance was heated with conc. sulphuric acid and then distilled with excess of strong alkali .the ammonia gas evolved was absorbed in 50ml of .1M HCl which required 23.2ml of c for neutralization at the end of the process. Determine the % of nitrogen in the compound ?

Description : 0.257g of organic substance was heated with conc. sulphuric acid and then distilled with excess of strong alkali .the ammonia gas evolved was absorbed in 50ml of .1M HCl which required 23.2ml of c for neutralization at the end of the process. Determine the % of nitrogen in the compound ?

Last Answer : A. Vol of 0 .1M HCl taken = 50ml Vol of .1MNaOH used for neutralization of unused acid=23.2ml Now, 23.2 ml of .1MNaOH =23.2ml of .1MHCl Vol of .1MHCl unused=23.2ml Vol of .1MHCl required ... NH3 solution contain nitrogen = 14*26.8/10*1000 Percentage of Nitrogen=14*26.8*100/10*1000*.257 =14.6%

when an alkali metal dissolves in liquid ammonia, the solution can acquire different colors. Explain .

Description : when an alkali metal dissolves in liquid ammonia, the solution can acquire different colors. Explain .

Last Answer : Ans. The dilute solutions of alkali metals in liquid ammonia exhibit dark blue color because ammoniated electrons absorb energy corresponding the red region of the visible light. However, If the ... copper-bronze and the solution acquires metallic luster due to the formation of metal ion clusters.

A Solution of sodium in liquid ammonia is strongly reducing in nature.Why?

Description : A Solution of sodium in liquid ammonia is strongly reducing in nature.Why?

Last Answer : Ans Due to presence of ammoniated electrons.