An exothermic reaction is one in which the reacting substances :

An exothermic reaction is one in which the reacting substances :
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An exothermic reaction is one in which the reacting substances : A. Have same energy as products ... D. Are at higher temperature than the products
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In an exothermic reaction, the energy of the reacting substances as compared to that of products is (A) More (B) Less (C) Same (D) Either (A) or (B), depends on order of reaction

Description : In an exothermic reaction, the energy of the reacting substances as compared to that of products is (A) More (B) Less (C) Same (D) Either (A) or (B), depends on order of reaction

Last Answer : (A) More

Photochemical reaction rate does not depend significantly on temperature, because (A) It is a reversible reaction (B) It is an exothermic reaction (C) The energy of reacting molecules exceeds the activation energy by absorption of light (D) None of these

Description : Photochemical reaction rate does not depend significantly on temperature, because (A) It is a reversible reaction (B) It is an exothermic reaction (C) The energy of reacting molecules exceeds the activation energy by absorption of light (D) None of these

Last Answer : (C) The energy of reacting molecules exceeds the activation energy by absorption of light

"The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances". This is the (A) Lewis-Randall rule (B) Statement of Van't Hoff Equation (C) Le-Chatelier's principle (D) None of these

Description : "The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances". This is the (A) Lewis- ... (B) Statement of Van't Hoff Equation (C) Le-Chatelier's principle (D) None of these

Last Answer : (D) None of these

A system of reacting substances from which neither the reactants nor the products are taken away or added to is called?

Description : A system of reacting substances from which neither the reactants nor the products are taken away or added to is called?

Last Answer : Closed system

A system of reacting substances from which neither the reactants nor the products are taken away or added to is called?

Description : A system of reacting substances from which neither the reactants nor the products are taken away or added to is called?

Last Answer : Closed system

What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope? (A) 0 (B) 1 (C) 2 (D) 3

Description : What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope? (A) 0 (B) 1 (C) 2 (D) 3

Last Answer : (C) 2

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.

Pick out the correct statement. (A) Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas (B) The 'Hatta number' is important in problems involving gas absorption without chemical reaction (C) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is linear in the case of steady state equimolal counter-diffusion (D) Total reflux in case of distillation operation requires infinite number of plates for a binary system separation

Description : Pick out the correct statement. (A) Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas (B) The 'Hatta number' is ... reflux in case of distillation operation requires infinite number of plates for a binary system separation

Last Answer : (C) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is linear in the case of steady state equimolal counter-diffusion

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved? (a) Displacement reaction (b) Precipitation reaction (c) Combination reaction (d) Double displacement reaction A) Only (A) B) Only (B) C) Only (D) D) (B) & (D)

Description : Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved? (a) Displacement reaction (b) Precipitation reaction (c) Combination ... Only (A) B) Only (B) C) Only (D) D) (B) & (D)

Last Answer : D) (B) & (D)

Pick out the correct statement. (A) Reactions with high activation energies are very temperature sensitive (B) Chemical equilibrium is a static state (C) A photochemical reaction is catalysed by light (D) A chemical reaction occurs when the energy of the reacting molecule is less than the activation energy of the reaction

Description : Pick out the correct statement. (A) Reactions with high activation energies are very temperature sensitive (B) Chemical equilibrium is a static state (C) A photochemical reaction is catalysed by ... occurs when the energy of the reacting molecule is less than the activation energy of the reaction

Last Answer : (A) Reactions with high activation energies are very temperature sensitive (B) Chemical equilibrium is a static state

A catalyst (A) Initiates a reaction (B) Lowers the activation energy of reacting molecules (C) Is capable of reacting with any one of the reactants (D) Cannot be recovered chemically unchanged at the end of a chemical reaction

Description : A catalyst (A) Initiates a reaction (B) Lowers the activation energy of reacting molecules (C) Is capable of reacting with any one of the reactants (D) Cannot be recovered chemically unchanged at the end of a chemical reaction

Last Answer : (C) Is capable of reacting with any one of the reactants

The increase in the rate of reaction with temperature is due to (A) Increase in the number of effective collisions (B) Decrease in activation energy (C) Increase in the average kinetic energy of the reacting molecules (D) None of these

Description : The increase in the rate of reaction with temperature is due to (A) Increase in the number of effective collisions (B) Decrease in activation energy (C) Increase in the average kinetic energy of the reacting molecules (D) None of these

Last Answer : (B) Decrease in activation energy

Half life period of a chemical reaction is (A) The time required to reduce the concentration of the reacting substance to half its initial value (B) Half of the space time of a reaction (C) Half of the residence time of a reaction (D) None of these

Description : Half life period of a chemical reaction is (A) The time required to reduce the concentration of the reacting substance to half its initial value (B) Half of the space time of a reaction (C) Half of the residence time of a reaction (D) None of these

Last Answer : (A) The time required to reduce the concentration of the reacting substance to half its initial value

Pick out the correct statement. (A) In catalytic reactions, the catalyst reacts with the reactants (B) A catalyst initiates a chemical reaction (C) A catalyst lowers the activation energy of the reacting molecules (D) A catalyst cannot be recovered chemically unchanged at the end of the chemical reaction

Description : Pick out the correct statement. (A) In catalytic reactions, the catalyst reacts with the reactants (B) A catalyst initiates a chemical reaction (C) A catalyst lowers the activation energy of ... molecules (D) A catalyst cannot be recovered chemically unchanged at the end of the chemical reaction

Last Answer : (C) A catalyst lowers the activation energy of the reacting molecules

What purpose does FeCl3 serve in the electrophilic aromatic substitution reaction between chlorine and benzene? (a) It serves as a radical initiator to produce the chlorine radical needed to propagate the chain reaction. (b) It functions by destabilizing the carbocationic intermediate and thereby increases the rate of H+ loss. (c) It serves as a Lewis base catalyst by reacting with Cl2 to generate chloride ions. (d) It serves as a Lewis acid catalyst by reacting with the Cl2 and thereby activates it toward attack by benzene’s π electrons.

Description : What purpose does FeCl3 serve in the electrophilic aromatic substitution reaction between chlorine and benzene? (a) It serves as a radical initiator to produce the chlorine radical needed to propagate the ... by reacting with the Cl2 and thereby activates it toward attack by benzene's π electrons.

Last Answer : It serves as a Lewis acid catalyst by reacting with the Cl2 and thereby activates it toward attack by benzene’s π electrons.

A catalyst in a chemical reaction (A) Decreases the activation energy (B) Alters the reaction mechanism (C) Increases the frequency of collisions of reacting species (D) All (A), (B) and (C)

Description : A catalyst in a chemical reaction (A) Decreases the activation energy (B) Alters the reaction mechanism (C) Increases the frequency of collisions of reacting species (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction. (A) Less than (B) Equal to (C) More than (D) Equal to or more than

Description : A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction. (A) Less than (B) Equal to (C) More than (D) Equal to or more than

Last Answer : (D) Equal to or more than

A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is (A) d(VCA )/dt = -F (CAF - CA ) - kCA 2V (B) d(VCA )/dt = F (CAF - CA ) - kCA 2V (C) d(VCA )/dt = -FCA - kCA 2V (D) d(VCA )/dt = FCAF - kCA 2V

Description : A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume ... 2V (C) d(VCA )/dt = -FCA - kCA 2V (D) d(VCA )/dt = FCAF - kCA 2V

Last Answer : (D) d(VCA )/dt = FCAF - kCA 2V

A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction. (A) Less than (B) Equal to (C) More than(D) Equal to or more than

Description : A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction. (A) Less than (B) Equal to (C) More than (D) Equal to or more than

Last Answer : (D) Equal to or more than

Which of the following represents an exothermic reaction :-

Description : Which of the following represents an exothermic reaction :-

Last Answer : Which of the following represents an exothermic reaction :- A. `N_(2)(g)+O_(2)(g)rarr 2NO(g), Delta H=180. ... 2)(g)rarr 2ZnO(s), Delta E = -693.8 KJ`

Which respresent an exothermic reaction :-

Description : Which respresent an exothermic reaction :-

Last Answer : Which respresent an exothermic reaction :- A. `2HgO(s)+180 K J rarr 2Hg(l)+O_(2)(s)` B. `N_(2)O(g)+C(s) ... g)rarr C_(2)H_(6)(g) , Delta E = -314 K J`

Which one of the reaction is an exothermic reaction

Description : Which one of the reaction is an exothermic reaction

Last Answer : Which one of the reaction is an exothermic reaction A. `CaCO_(3)(s)rarr CaO(s)+CO_(2)(g)` B. `N_(2)(g ... (s)rarr 2Hg(s)+O_(2)(g)` D. None of these

The prepation of `SO_(3)(g)` by reaction `SO_(2)(g)+(1)/(2)O_(2)(g)hArrSO_(3)(g)` is an exothermic reaction .If the preparation follows the following

Description : The prepation of `SO_(3)(g)` by reaction `SO_(2)(g)+(1)/(2)O_(2)(g)hArrSO_(3)(g)` is an exothermic reaction .If the preparation follows the following

Last Answer : The prepation of `SO_(3)(g)` by reaction `SO_(2)(g)+(1)/(2)O_(2)(g) ... D. Nothing could be predicted about temperature through given informatoion.

What is the heat balance equation for a exothermic reaction?

Description : What is the heat balance equation for a exothermic reaction?

Last Answer : For an exothermic reaction, heat should appear as a productsince heat is given off. Thus, it would be A + B ==> C + D +heat

Is caramelizing sugar a endothermic or exothermic reaction?

Description : Is caramelizing sugar a endothermic or exothermic reaction?

Last Answer : This is an endothermic reaction.

Why is Burning sugar an exothermic reaction?

Description : Why is Burning sugar an exothermic reaction?

Last Answer : What is the answer ?

Is a match is lit and Burns endothermic or exothermic reaction?

Description : Is a match is lit and Burns endothermic or exothermic reaction?

Last Answer : Need answer

Is acid rain an exothermic or endothermic reaction?

Description : Is acid rain an exothermic or endothermic reaction?

Last Answer : No

Fermentation is a type of ______ process. (1) Aerobic Respiration (2) Anaerobic Respiration (3) Exothermic Reaction (4) Transpiration

Description : Fermentation is a type of ______ process. (1) Aerobic Respiration (2) Anaerobic Respiration (3) Exothermic Reaction (4) Transpiration

Last Answer : (2) Anaerobic Respiration Explanation: Fermentation in food processing is the process of converting carbohydrates to alcohol or organic acids using microorganisms—yeasts or bacteria—under anaerobic conditions. It also occurs in oxygenstarved muscle cells, as in the case of lactic acid fermentation.

Combustion of a candle is a/an - (1) photochemical reaction (2) physical change (3) endothermic reaction (4) exothermic reaction

Description : Combustion of a candle is a/an - (1) photochemical reaction (2) physical change (3) endothermic reaction (4) exothermic reaction

Last Answer : (4) exothermic reaction Explanation: In theory, a candle is made of a solid hydrocarbon called paraffin. When the solid burns, the hydrocarbon reacts with oxygen to form carbon dioxide and water. The reaction is exothermic, meaning it releases heat to the atmosphere along with the other products.

The process of dissolving an acid or a base in water is a highly - (1) Exothermic reaction (2) Endothermic reaction (3) Sublimation reaction (4) Redux reaction

Description : The process of dissolving an acid or a base in water is a highly - (1) Exothermic reaction (2) Endothermic reaction (3) Sublimation reaction (4) Redux reaction

Last Answer : (1) Exothermic reaction Explanation: The process of dissolving an acid or a base in water is a highly exothermic one. This is why care must be taken while mixing concentrated nitric acid or sulphuric acid with water.

The reaction between an acid and a base to give a salt and water is known as a - (1) Neutralisation reaction (2) Reduction reaction (3) Oxidation reaction (4) Exothermic reaction

Description : The reaction between an acid and a base to give a salt and water is known as a - (1) Neutralisation reaction (2) Reduction reaction (3) Oxidation reaction (4) Exothermic reaction

Last Answer : (1) Neutralisation reaction Explanation: The effect of a base is nullified by an acid and vice-versa. Example: Reaction of Sodium hydroxide with hydrochloric acidNaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

Choose the correct statement. (A) Coking tendency increases with increasing molecular weight (B) Coking tendency decreases with increasing molecular weight (C) Higher pressure enhances coke formation (D) Coking is an exothermic reaction

Description : Choose the correct statement. (A) Coking tendency increases with increasing molecular weight (B) Coking tendency decreases with increasing molecular weight (C) Higher pressure enhances coke formation (D) Coking is an exothermic reaction

Last Answer : (A) Coking tendency increases with increasing molecular weigh

Cracking is (A) An exothermic reaction(B) An endothermic reaction(C) Favoured at very low temperature(D) None of these

Description : Cracking is (A) An exothermic reaction (B) An endothermic reaction (C) Favoured at very low temperature (D) None of these

Last Answer : (B) An endothermic reaction

C6H12O6 (aq) + 602(aq) →6CO2(aq) + 6H2O The above reaction is a/an (a) displacement reaction (b) endothermic reaction (c) exothermic reaction (d) neutralisation reaction

Description : C6H12O6 (aq) + 602(aq) →6CO2(aq) + 6H2O The above reaction is a/an (a) displacement reaction (b) endothermic reaction (c) exothermic reaction (d) neutralisation reaction

Last Answer : Answer: (c)

Pick out the wrong statement (A) Co-current absorbers are usually used, when the gas to be dissolved in the liquid is a pure substance (B) In case of gas absorption, HETP is equal to HTU, when both the operating line & the equilibrium lines are parallel (C) Hatta number is important in case of gas absorption with chemical reaction (D) In actual practice, absorption is an endothermic process, while stripping is an exothermic process

Description : Pick out the wrong statement (A) Co-current absorbers are usually used, when the gas to be dissolved in the liquid is a pure substance (B) In case of gas absorption, HETP is ... reaction (D) In actual practice, absorption is an endothermic process, while stripping is an exothermic process

Last Answer : (D) In actual practice, absorption is an endothermic process, while stripping is an exothermic process

What is exothermic reaction?

Description : What is exothermic reaction?

Last Answer : Here energy is released from the reaction, and therefore reaction essentially goes to completion, e.g. urease enzyme, converting urea to ammonia + CO2 + energy.

What is an exothermic reaction?

Description : What is an exothermic reaction?

Last Answer : A chemical reaction in which heat is liberated is called exothermic reaction. Ex: Dissolution of sodium hydroxide, calcium oxide, sulphuric acid and combustion of fuel.

EXOTHERMIC REACTION

Description : EXOTHERMIC REACTION

Last Answer : EXOTHERMIC REACTION: It is the reaction in which heat evolved. Tis is known as exotermic reaction. Heat is evolved.

All decomposition reaction are endothermic but decomposition of vegetable matter into compost is exothermic because (a) It is an oxidation reaction (b) decomposition done by microbes (c) releases heat energy (d) all the above

Description : All decomposition reaction are endothermic but decomposition of vegetable matter into compost is exothermic because (a) It is an oxidation reaction (b) decomposition done by microbes (c) releases heat energy (d) all the above

Last Answer : (d) all the above

During decomposition, energy is absorbed in the form of heat, light or electricity for breaking down the reactants which is known as: (a) exothermic reaction (b) endothermic reaction (c) reduction reaction (d) oxidation

Description : During decomposition, energy is absorbed in the form of heat, light or electricity for breaking down the reactants which is known as: (a) exothermic reaction (b) endothermic reaction (c) reduction reaction (d) oxidation

Last Answer : (b) endothermic reaction

During photosynthesis, energy is absorbed by chlorophyll, therefore it is: (a) exothermic reaction (b) endothermic reaction (c) neither exothermic nor endothermic reaction (d) the process takes place in plants only

Description : During photosynthesis, energy is absorbed by chlorophyll, therefore it is: (a) exothermic reaction (b) endothermic reaction (c) neither exothermic nor endothermic reaction (d) the process takes place in plants only

Last Answer : (b) endothermic reaction

Which of the following describes the given graph correctly? Potential energy Reaction Product Substrate B A (a) Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme. (b) Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme. (c) Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme. (d) Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme.

Description : Which of the following describes the given graph correctly? Potential energy Reaction Product Substrate B A (a) Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme. (b) ... . (d) Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme.

Last Answer : (b) Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme

The combustion reaction, C + O2 = CO2 , is (A) Exothermic (B) Endothermic (C) Autocatalytic

Description : The combustion reaction, C + O2 = CO2 , is (A) Exothermic (B) Endothermic (C) Autocatalytic

Last Answer : (A) Exothermic

The gasification reaction represented by, C + H2O = CO + H2 , is (A) Exothermic (B) Endothermic (C) Catalytic (D) Autocatalytic

Description : The gasification reaction represented by, C + H2O = CO + H2 , is (A) Exothermic (B) Endothermic (C) Catalytic (D) Autocatalytic

Last Answer : (B) Endothermic

Combustion reaction of fuels is a/an __________ reaction. (A) Auto catalytic (B) Exothermic (C) Endothermic (D) None of these

Description : Combustion reaction of fuels is a/an __________ reaction. (A) Auto catalytic (B) Exothermic (C) Endothermic (D) None of these

Last Answer : (B) Exothermic

Formation of ammonium carbamate by reaction of NH3 with CO2 is a/an __________ reaction. (A) Catalytic (B) Exothermic (C) Endothermic (D) Reversible

Description : Formation of ammonium carbamate by reaction of NH3 with CO2 is a/an __________ reaction. (A) Catalytic (B) Exothermic (C) Endothermic (D) Reversible

Last Answer : (B) Exothermic

Liquid ammonia and 60% nitric acid reaction (which producesammonium nitrate) is(A) Exothermic(B) Endothermic(C) Autocatalytic(D) None of these

Description : Liquid ammonia and 60% nitric acid reaction (which producesammonium nitrate) is (A) Exothermic (B) Endothermic (C) Autocatalytic (D) None of these

Last Answer : (A) Exothermic

Dehydration of ammonium carbamate to yield urea is a/an __________ reaction. (A) Exothermic (B) Endothermic (C) Autocatalytic (D) Catalytic

Description : Dehydration of ammonium carbamate to yield urea is a/an __________ reaction. (A) Exothermic (B) Endothermic (C) Autocatalytic (D) Catalytic

Last Answer : (B) Endothermic