What According to modern chemistry what causes chemical reactions?

What According to modern chemistry what causes chemical reactions?
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A chemical reaction is caused by two compounds colliding. Thishappen with certain amount of force.
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Write a balanced chemical equation with state symbols for the following reactions : -Chemistry-10

Description : Write a balanced chemical equation with state symbols for the following reactions : -Chemistry-10

Last Answer : (i) BaCl2 (aq) + Na2SO4 (aq) → BaSO4(s) + 2NaCl (aq) (ii) NaOH (aq) + HCl(aq) → NaCl(aq) + H2O(l)

Write the balanced equation for the following chemical reactions. (i) Hydrogen + Chlorine → Hydrogen chloride (ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride (iii) Sodium + Water → Sodium hydroxide + Hydrogen -Chemistry-10

Description : Write the balanced equation for the following chemical reactions. (i) Hydrogen + Chlorine → Hydrogen chloride (ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride (iii) Sodium + Water → Sodium hydroxide + Hydrogen -Chemistry-10

Last Answer : (i) H2 + Cl2 → 2HCl (ii) 3 BaCl2 + Al2(SO4)3 → BaSO4 + 2 AlCl3 (iii) 2Na + 2H2O → 2NaOH + H2↑

Write chemical equation reactions taking place when carried out with the help of (a) Iron reacts with steam (b) Magnesium reacts with dil HCl (c) Copper is heated in air. -Chemistry

Description : Write chemical equation reactions taking place when carried out with the help of (a) Iron reacts with steam (b) Magnesium reacts with dil HCl (c) Copper is heated in air. -Chemistry

Last Answer : This is the Answer.

(a) Write the essential condition for the following reaction to take place: 2AgBr—-> 2Ag + Br2 Write one application of this reaction. (b) Complete the following chemical equation of a chemical reaction 2FeS04 — chemical-reactions-and-equations-chapter-wise-important-questions-class-10-science-5 (c) What happens when water is added to quick line. Write chemical equation. -Chemistry

Description : (a) Write the essential condition for the following reaction to take place: 2AgBr--> 2Ag + Br2 Write one application of this reaction. (b) Complete the following chemical equation of a chemical ... science-5 (c) What happens when water is added to quick line. Write chemical equation. -Chemistry

Last Answer : Answer. This reaction is used in photography. (c) Slaked lime is formed with hissing sound and lot of heat is envolved.

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:

Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry

Description : Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry

Last Answer : i hope it helped you

Identify the substances that are oxidised and the substances which are reduced in the following reactions. (i) 4Na(s) + O2(g) → 2Na2O(s) (ii) CuO (s) + H2(g) → Cu (s) + H2O(l) -Chemistry-10

Description : Identify the substances that are oxidised and the substances which are reduced in the following reactions. (i) 4Na(s) + O2(g) → 2Na2O(s) (ii) CuO (s) + H2(g) → Cu (s) + H2O(l) -Chemistry-10

Last Answer : (i) Substances oxidised is Na as it gains oxygen and oxygen is reduced. (ii) Substances reduced is Cu as hydrogen is oxidised as it gains oxygen.

(a) What are fuel cells? Explain the electrode reactions involved in the working of H2 – O2 fuel cell. (b) Represent the galvanic cell in which the reaction Zn (s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s) takes place. -Chemistry

Description : (a) What are fuel cells? Explain the electrode reactions involved in the working of H2 – O2 fuel cell. (b) Represent the galvanic cell in which the reaction Zn (s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s) takes place. -Chemistry

Last Answer : (a) Fuel cells : These cells are the devices which convert the energy produced during combustion of fuels like H2, CH4, etc. directly into electrical energy. The electrode reaction for H2 – O2 fuel cell : (b) The galvanic cell may be represented as Zn (s) | Zn2+ (1M) || Cu2+ (1M) | Cu (s)

Two half-reactions of an electrochemical cell are given below : MnO–4 (aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e–, E° = + 0.15 V. Construct the redox equation from the standard potential of the cell and predict if the reaction is reactant favoured or product favoured. -Chemistry

Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e- ... the redox equation from the standard potential of the cell and predict if the reaction is reactant favoured or product favoured. -Chemistry

Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → = Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V At cathode (reduction) : MnO-4(aq) + 8H+ ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.

The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere. -Chemistry

Description : The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere. -Chemistry

Last Answer : The mechanism of corrosion is explained on the basis of electrochemical theory. By taking example of rusting of iron, we Refer tothe formation of small electrochemical cells on the surface of iron. The redox reaction involves ... net resultant Redox reaction is 2Fe(s) + O2 (g) + 4H+ → 2Fe2+ + 2H2O

Two half-reactions of an electrochemical cell are given below : MnO–4 (aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e–, E° = + 0.15 V. Construct the redox reaction equation from the two half-reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. -Chemistry

Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + ... -reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. -Chemistry

Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V Af cathode (reduction) : MnO-4(aq) + 8H+ ( ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.

Who is called the father of modern chemistry ?

Description : Who is called the father of modern chemistry ?

Last Answer : Lavoisier is said to be the father of modern chemistry.

Who is the father of modern chemistry ?

Description : Who is the father of modern chemistry ?

Last Answer : Anthony Lavoisier, the father of modern chemistry.

What is the basis of modern chemistry ?

Description : What is the basis of modern chemistry ?

Last Answer : Dalton's atomism 6

Who is the father of modern chemistry ?

Last Answer : The father of modern chemistry: Anthony Laurent Lavoisier.

What was the contribution of alchemy to modern chemistry?

Description : What was the contribution of alchemy to modern chemistry?

Last Answer : Alchemy was responsible for much of our knowledge of substancesand their behaviour. Like many human endeavours, though, it washampered in its progression until the application of the scientificmethod ... of the realms of philosophy, and replacedpre-conceived ideas with interpretations based on fact.

Most liquids that conduct electricity are solutions of acids, bases and ______. Salts Who is known as the father of modern chemistry?

Description : Most liquids that conduct electricity are solutions of acids, bases and ______. Salts Who is known as the father of modern chemistry?

Last Answer : Antoine Lavoisier

Who is regarded as father of modern chemistry? (1) Ruterford (2) Einstein (3) Lavoisier (4) C.V. Raman

Description : Who is regarded as father of modern chemistry? (1) Ruterford (2) Einstein (3) Lavoisier (4) C.V. Raman

Last Answer : (3) Lavoisier Explanation: Antoine Lavoisier is considered the father of modern chemistry. He was a French nobleman who recognized and named oxygen and isolated the major components of air.

The father of modern chemistry is – (1) Priestley (2) Lavoisier (3) Dalton (4) Mendeleeff

Description : The father of modern chemistry is – (1) Priestley (2) Lavoisier (3) Dalton (4) Mendeleeff

Last Answer : (2) Lavoisier Explanation: Antoine Lavoisier was a French nobleman and chemist central to the 18thcentury chemical revolution and a large influence on both the history of chemistry and the history of biology.

Who is considered the father of modern Chemistry?

Description : Who is considered the father of modern Chemistry?  

Last Answer : ANSWER: LAVOISIER

Who is credited, in the history of modern chemistry, with discovering X-rays?

Description : Who is credited, in the history of modern chemistry, with discovering X-rays?

Last Answer : ANSWER: WILLIAM ROENTGEN

Who is accredited in the history of modern chemistry of proving that neutrons existed?

Description : Who is accredited in the history of modern chemistry of proving that neutrons existed?

Last Answer : ANSWER: JAMES CHADWICK

For you chemistry and physics types: does the lifting power of helium change according to how small of a space you put it in?

Description : For you chemistry and physics types: does the lifting power of helium change according to how small of a space you put it in?

Last Answer : answer:Yes. Basically the buoyancy of an object will depend on its volume and density. Lift has to do with displacement of air and density of the gas displacing the air. In a rigid ... to atmospheric pressure on the non-rigid balloon preventing very low densities from occurring within the balloon.

Name the following coordination compounds according to IUPAC system of nomenclature :(i) [Co(NH3)4 (H2O)Cl]Cl2 (ii) [CrCl2(en)2]Cl, (en = ethane – 1, 2 – diamine) -Chemistry

Description : Name the following coordination compounds according to IUPAC system of nomenclature :(i) [Co(NH3)4 (H2O)Cl]Cl2 (ii) [CrCl2(en)2]Cl, (en = ethane – 1, 2 – diamine) -Chemistry

Last Answer : (i) [CO(NH3)4 (H2O)Cl]Cl2 Tetraammine aquachlorido cobalt (III) chloride (ii) [CrCl2(en)2]Cl Dichlorobis (ethane-1, 2-diamine) chromium (III) chloride

Two substances, A and B were made to react to form a third substance, A2B according to the following reaction 2A + B → A2 B. Which of the following statements concerning this reaction are incorrect? -Chemistry 9th

Description : Two substances, A and B were made to react to form a third substance, A2B according to the following reaction 2A + B → A2 B. Which of the following statements concerning this reaction are incorrect? -Chemistry 9th

Last Answer : (c) (i), (iii), (iv) Consider the example of H2O

12.Few iron filings and a pinch of sulphur powder are taken in a china dish and mixed properly. Justify the change, giving two points as physical/chemical change. -Chemistry

Description : 12.Few iron filings and a pinch of sulphur powder are taken in a china dish and mixed properly. Justify the change, giving two points as physical/chemical change. -Chemistry

Last Answer : It is a physical change as if we will bring the magnet near it all the iron fillings will attract towards it. Hence it shows the properties of it constituents are present so, no new substance is formed. Therefore, it is a physical change .

.Identify the physical and chemical changes from the following (i)Burning of magnesium in air (ii)Electrolysis of water (iii)Tarnishing of silver spoon (iv)Sublimation of iodine -Chemistry

Description : .Identify the physical and chemical changes from the following (i)Burning of magnesium in air (ii)Electrolysis of water (iii)Tarnishing of silver spoon (iv)Sublimation of iodine -Chemistry

Last Answer : (i) Burning of magnesium in air : Chemical change (ii) Tarnishing of silver spoon : Chemical change (iii) Sublimation of iodine : Physical change (iv) Electrolysis of water to form hydrogen and oxygen is also a chemical change.

What is meant by skeltal type chemical equation? What does it represent? Using the equation for electrolytic decomposition of water, differentiate between a skeltal chemical equation and a balanced chemical equation. -Chemistry

Description : What is meant by skeltal type chemical equation? What does it represent? Using the equation for electrolytic decomposition of water, differentiate between a skeltal chemical equation and a balanced chemical equation. -Chemistry

Last Answer : Answer. The equations in which gaseous are written in atomic form instead of molecular form and equation is not balanced, are called skeltal type equation. They represent gaseous elements formed in atomic state and equation is not balanced

Which products will be obtained when lead nitrate is heated simply. Write balanced chemical equation for the reaction? State the type of chemical reaction that occur in the change. -Chemistry

Description : Which products will be obtained when lead nitrate is heated simply. Write balanced chemical equation for the reaction? State the type of chemical reaction that occur in the change. -Chemistry

Last Answer : Answer. Lead monoxide, nitrogen dioxide and oxygen gas will be liberated. It is thermal decomposition reaction.

What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate? Name the type of reaction. Write a balanced chemical equation to represent the above chemical reaction. -Chemistry

Description : What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate? Name the type of reaction. Write a balanced chemical equation to represent the above chemical reaction. -Chemistry

Last Answer : Answer.Yellow precipitate of lead iodide is formed. It is precipitation reaction. Pb( NO3)2 (aq) + 2KI (aq) —-> Pbl2 (s) + 2KNO3 (aq) It is also called double displacement reaction.

(a) Define a balanced chemical equation. Why should an equation be balanced? (b) Write the balanced chemical equation for the following reaction: (i) Phosphorus burns in presence of chlorine to form phosphorus penta chloride. (ii) Burning of natural gas. (iii) The process of respiration. -Chemistry

Description : (a) Define a balanced chemical equation. Why should an equation be balanced? (b) Write the balanced chemical equation for the following reaction: (i) Phosphorus burns in presence of chlorine to form phosphorus penta chloride. (ii) Burning of natural gas. (iii) The process of respiration. -Chemistry

Last Answer : Answer. (a) Balanced chemical equation has an equal number of atoms of different elements in the reactants and products. According to law of conservation of mass, matter can neither be created nor be destroyed in a chemical ... C6H12O6 (s) + 6O2 (g) + 6H2O ---> 6CO2 (aq) + 12H2O (l) + energy

2g of ferrous sulphate crystals are heated in a dry boiling tube. (i) List any two observations. (ii) Name the type of chemical reaction taking place. (iii) ‘Write the chemical equation for the reaction. -Chemistry

Description : 2g of ferrous sulphate crystals are heated in a dry boiling tube. (i) List any two observations. (ii) Name the type of chemical reaction taking place. (iii) ‘Write the chemical equation for the reaction. -Chemistry

Last Answer : Answer. (i) •Green colour of Fe SO4 disappears and reddish brown solid is formed. • Smell of burning sulphur. (ii) Decomposition reaction

Write the chemical equation of the reaction in which the following changes have taken place with an example of each: (i) Change in colour (ii) Change in temperature (iii) Formation of precipitate -Chemistry

Description : Write the chemical equation of the reaction in which the following changes have taken place with an example of each: (i) Change in colour (ii) Change in temperature (iii) Formation of precipitate -Chemistry

Last Answer : (i)Cu (s) + 2AgNO3 (aq)———–> Cu(NO3)2(aq) + 2Ag The solution will become blue in colour and shiny silver metal will be deposited. (ii) NaOH + HCl ——&mdash ... )———–> Pbl2 (s) + 2KNO3 (aq) Yellow ppt Yellow precipitate of Pbl2will be formed.

A Name the type of chemical reaction represented by the following equation: -Chemistry

Description : A Name the type of chemical reaction represented by the following equation: -Chemistry

Last Answer : Answer. (i) Combination reaction (ii) Double displacement reaction (Precipitation reaction) (iii) Decomposition reaction.

i) Write a balanced chemical equation for process of photosynthesis. (ii)When do desert plants take up carbon dioxide and perform photosynthesis? -Chemistry

Description : i) Write a balanced chemical equation for process of photosynthesis. (ii)When do desert plants take up carbon dioxide and perform photosynthesis? -Chemistry

Last Answer : Answer. (ii) In desert plants the stomata are open at night. They take CO2 at night and is stored in the form of acid and is used during day time for photosynthesis.

Giving an example list two information which make a chemical equation more useful (informative). -Chemistry

Description : Giving an example list two information which make a chemical equation more useful (informative). -Chemistry

Last Answer : (i) Physical state of reactants must be mentioned, e.g. 2H2 (g) + O2 (g)--- > 2H20 (l) (ii) Condition in which reaction takes place are written on the arrow head, e.g. ... BaCl2--> BaSO4 + 2NaCl (White ppt) The reaction is precipitation reaction. It is also called double displacement reaction.

“We need to balance a skeltal chemical equation.” Give reason to justify the statement. -Chemistry

Description : “We need to balance a skeltal chemical equation.” Give reason to justify the statement. -Chemistry

Last Answer : Skeltal chemical equation are unbalanced. We need to balance chemical equation because of law of conservation of mass. It states that ‘matter can neither be created nor be destroyed’. Therefore chemical equation must be balanced in each and every chemical reaction.

A metal ‘X’ acquires a green colour coating on its surface on exposure to air. (i) Identify the metal ‘X’ and name the process responsible for this change. (ii)Name and write chemical formula of the green coating formed on the metal. (iii) List two important methods to prevent the process. -Chemistry

Description : A metal X' acquires a green colour coating on its surface on exposure to air. (i) Identify the metal X' and name the process responsible for this change. (ii)Name and write chemical ... the green coating formed on the metal. (iii) List two important methods to prevent the process. -Chemistry

Last Answer : (i) Metal is copper. The process is corrosion. (ii)Basic copper carbonate [CuCO3.Cu(0H)2]. (iii) • It should be coated with tin • It should be mixed with other metals to form alloys.

Explain why calcium metal after reacting with water starts floating on its * surface. Write the chemical equation for the reaction. Name one more metal that starts floating after some time when immersed in water. -Chemistry

Description : Explain why calcium metal after reacting with water starts floating on its * surface. Write the chemical equation for the reaction. Name one more metal that starts floating after some time when immersed in water. -Chemistry

Last Answer : Calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of metal. Magnesium reacts with hot water and starts floating due to the bubbles of hydrogen gas sticking to its surface.

10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) Copper coin is kept immersed in silver nitrate solution for some time. What change will take place in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry

Description : 10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) ... in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry

Last Answer : (a) Carbonate ore: (i) Calcination: Carbonate ore is heated in limited supply of air and oxide is obtained, e.g. (b) Copper, being more reactive than silver will displace silver from silver nitrate ... and there will be deposition of silver on copper coin. The colour of solution will turn to blue.

Explain relation between chemistry and chemical engineering.

Description : Explain relation between chemistry and chemical engineering.

Last Answer : Relation between chemistry and chemical engineering: 1. Chemical Engineering is the technology of Chemistry. 2. Chemistry deals with unit process whereas chemical engineering covers unit operation as ... in limited quantity whereas to get large quantity of products chemical engineering is needed.

What is Biological Chemistry? Chemical Biology? And BioOrganic Chemistry?

Description : What is Biological Chemistry? Chemical Biology? And BioOrganic Chemistry? 

Last Answer : Definition of Biological Chemistry: Biological Chemistry is the understanding how biological processes are controlled by underlying chemical principles. Definition of Chemical Biology: Chemical Biology is ... Biochemistry deals with study of life processes by means of biochemical methodology. 

Jaroslav Heyrovsky (Czechoslovakiw) received the 1959 Nobel Prize in chemistry for developing what technique used in chemical analysis?

Description : Jaroslav Heyrovsky (Czechoslovakiw) received the 1959 Nobel Prize in chemistry for developing what technique used in chemical analysis?

Last Answer : ANSWER: POLAROGRAPHY

Give reasons for the following observations: (a) The element carbon forms a very large number of compounds. (b) Air holes of a gas burner have to be adjusted when the heated vessels get blackened by the flame. (c) Use of synthetic detergents causes pollution of water. -Chemistry

Description : Give reasons for the following observations: (a) The element carbon forms a very large number of compounds. (b) Air holes of a gas burner have to be adjusted when the heated vessels get blackened by the flame. (c) Use of synthetic detergents causes pollution of water. -Chemistry

Last Answer : Answer. (a) Carbon forms large number of compounds since carbon is small in size and can form stable covalent bonds (catenation) and it shows tetravalency. (b) Air holes of gas burner are ... not get blackened. (c) Some synthetic detergents are non-biodegradable, therefore, cause pollution of water.

There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of varia

Description : There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of varia

Last Answer : There are two opposing views about origin of modern man. According to one view Homo erectus in ... Africa D. Greater variation in Africa than in Asia

According to Modern Theory of Rent, rent accrues to - (1) capital only (2) any factor (3) labour only (4) land only

Description : According to Modern Theory of Rent, rent accrues to - (1) capital only (2) any factor (3) labour only (4) land only

Last Answer : (2) any factor Explanation: Modern theory of rent does not confine itself to the reward of only land as a factor of production as was the case in the classical Ricardian theory of rent. Rent in ... can arise in respect of any other factor of production. i.e., labour, capital and entrepreneurship.

According to Modern approach, law of demand is caused by (a) Income effect ; (b) Substitution effect ; (c) Both ; (d) None

Description : According to Modern approach, law of demand is caused by (a) Income effect ; (b) Substitution effect ; (c) Both ; (d) None

Last Answer : (c) Both ;

According to Modern Theory of Rent, rent accrues to (1) capital only (2) any factor (3) labour only (4) land only

Description : According to Modern Theory of Rent, rent accrues to (1) capital only (2) any factor (3) labour only (4) land only

Last Answer : any factor

According to modern thinking, the law of diminishing returns applies to (1) agriculture (2) industry (3) mining (4) all fields of production

Description : According to modern thinking, the law of diminishing returns applies to (1) agriculture (2) industry (3) mining (4) all fields of production

Last Answer : all fields of production 

Is there any available software that can predict simple chemical reactions?

Description : Is there any available software that can predict simple chemical reactions?

Last Answer : Google is your friend = = = > Zn with CuSO4