If the only reactants of a reaction were zn and hci what does the law of conservation of mass say about the products?

If the only reactants of a reaction were zn and hci what does the law of conservation of mass say about the products?
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The only reactants in a reaction were Zn and HCI. What does the law of conservation of matter say about the products?

Description : The only reactants in a reaction were Zn and HCI. What does the law of conservation of matter say about the products?

Last Answer : The product will contain only Zn, H, and CI. -Apex

It is important to balance the chemical equations to satisfy the law of conservation of mass. Which of the following statements of the law is incorrect? (a) The total mass of the elements present in the reactants is equal to the total mass of the elements present in the products. (b) The number of atoms of each element remains the same, before and after a chemical reaction. (c) The chemical composition of the reactants is the same before and after the reaction (d) Mass can neither be created nor can it be destroyed in a chemical Reaction.

Description : It is important to balance the chemical equations to satisfy the law of conservation of mass. Which of the following statements of the law is incorrect? (a) The total mass of the elements present in ... the reaction (d) Mass can neither be created nor can it be destroyed in a chemical Reaction.

Last Answer : Answer : (c) The chemical composition of the reactants is the same before and after the reaction

Pick out the correct statement. (A) A catalyst does not change AH of the reaction (B) A catalyst changes the equilibrium point (C) Law of mass action was suggested by Le-Chatelier (D) The difference between the energy of reactants and that of the products is the activation energy

Description : Pick out the correct statement. (A) A catalyst does not change AH of the reaction (B) A catalyst changes the equilibrium point (C) Law of mass action was suggested by Le-Chatelier (D) The difference between the energy of reactants and that of the products is the activation energy

Last Answer : (A) A catalyst does not change AH of the reaction

After a chemical reaction, the total mass of reactants and products [MP PMT 1989] (A) Is always increased (B) Is always decreased (C) Is not changed (D) Is always less or more

Description : After a chemical reaction, the total mass of reactants and products [MP PMT 1989] (A) Is always increased (B) Is always decreased (C) Is not changed (D) Is always less or more

Last Answer : (C) Is not changed

The Rate Law expresses the rate of a reaction in terms of the concentrations of the: w) reactants x) products y) by-products z) catalysts

Description : The Rate Law expresses the rate of a reaction in terms of the concentrations of the: w) reactants x) products y) by-products z) catalysts

Last Answer : ANSWER: W -- REACTANTS 

According to the 'law of mass action', the rate of reaction is directlyproportional to the (A) Equilibrium constant (B) Volume of the reaction vessel (C) Nature of the reactants (D) Molar concentration of the reactants

Description : According to the 'law of mass action', the rate of reaction is directlyproportional to the (A) Equilibrium constant (B) Volume of the reaction vessel (C) Nature of the reactants (D) Molar concentration of the reactants

Last Answer : (D) Molar concentration of the reactants

(3) two light nuclei combine to form a heavy nucleus Explanation: Nuclear fusion is the process of making a single heavy nucleus (part of an atom) from two lighter nuclei. The difference in mass between the products and reactants is manifested as the release of large amounts of energy. Fusion is the process that powers active or "main sequence" stars, or other high magnitude stars.

Description : (3) two light nuclei combine to form a heavy nucleus Explanation: Nuclear fusion is the process of making a single heavy nucleus (part of an atom) from two lighter nuclei. The difference in mass ... . Fusion is the process that powers active or "main sequence" stars, or other high magnitude stars.

Last Answer : Helium is added to the oxygen supply of deep sea divers because it is - (1) less poisonous than nitrogen (2) (2) Lighter than nitrogen (3) Readily miscible with oxygen (4) less soluble in blood than nitrogen at high pressure

Consider the following gas - phase reaction : `2A(g)+B(g)rArrC(g)+D(g)` An equilibrium mixture of reactants and products is subjected to the following

Description : Consider the following gas - phase reaction : `2A(g)+B(g)rArrC(g)+D(g)` An equilibrium mixture of reactants and products is subjected to the following

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Reverse reaction in a chemical equilibrium is favoured by the (A) Removal of one of the products regularly (B) Increase in the concentration of one of the products (C) Increase in the concentration of one of the reactants (D) None of these

Description : Reverse reaction in a chemical equilibrium is favoured by the (A) Removal of one of the products regularly (B) Increase in the concentration of one of the products (C) Increase in the concentration of one of the reactants (D) None of these

Last Answer : (B) Increase in the concentration of one of the products

Which of the following will favour the reverse reaction in a chemical equilibrium reaction? (A) Increasing the concentration of one of the reactants (B) Increasing the concentration of one or more of the products (C) Removal of at least one of the products at regular interval (D) None of these

Description : Which of the following will favour the reverse reaction in a chemical equilibrium reaction? (A) Increasing the concentration of one of the reactants (B) Increasing the concentration of one or more of the products (C) Removal of at least one of the products at regular interval (D) None of these

Last Answer : (B) Increasing the concentration of one or more of the products

For a zero order chemical reaction, the (A) Half life period is directly proportion to the initial concentration of the reactants (B) Plot of products concentration with time is a straight line through the origin (C) Products concentration increases linearly with time (D) All (A), (B) and (C)

Description : For a zero order chemical reaction, the (A) Half life period is directly proportion to the initial concentration of the reactants (B) Plot of products concentration with time is a straight line through the origin (C) Products concentration increases linearly with time (D) All (A), (B) and (C)

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

In an exothermic chemical reaction, the reactants compared to the products have (A) Higher temperature (B) More energy (C) Less energy (D) Same energy

Description : In an exothermic chemical reaction, the reactants compared to the products have (A) Higher temperature (B) More energy (C) Less energy (D) Same energy

Last Answer : (B) More energy

Pick out the wrong statement. (A) Exit age description function (E) and internal age distribution function (I) are related as, E = -(dI/dθ) (B) Chemisorption studies are useful in the determination of catalyst surface area and pore size distribution (C) A higher temperature favours the reaction of higher activation energy (D) A catalyst increases the potential energy barrier over which the reactants must pass to form products

Description : Pick out the wrong statement. (A) Exit age description function (E) and internal age distribution function (I) are related as, E = -(dI/dθ) (B) Chemisorption studies are useful in the ... energy (D) A catalyst increases the potential energy barrier over which the reactants must pass to form products

Last Answer : (D) A catalyst increases the potential energy barrier over which the reactants must pass to form products

The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy. (A) Activation (B) Potential (C) Binding (D) Threshold

Description : The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy. (A) Activation (B) Potential (C) Binding (D) Threshold

Last Answer : (A) Activation

Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction?(A) Ash resistance (B) Gas film and pore surface diffusion resistances for reactants (C) Surface phenomenon resistance (D) Gas film and pore surface diffusion resistances for products

Description : Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction? (A) Ash resistance (B) Gas film and pore surface diffusion resistances for reactants (C) Surface phenomenon resistance (D) Gas film and pore surface diffusion resistances for products

Last Answer : (A) Ash resistance

Pick out the wrong statement. (A) 'Hold back' is defined as the fraction of material that stays longer than the mean residence time (B) Study of non-ideal flow reactor is done experimentally by stimulus￾response technique (C) For studying a chemical reaction, it is desirable to monitor the reactants during initial stages and the products during the final stages of reaction (D) A batch reactor cannot be used to study the kinetics of catalytic reaction

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Last Answer : (D) A batch reactor cannot be used to study the kinetics of catalytic reaction

The extent of a reaction is (A) Different for reactants and products (B) Dimensionless (C) Depends on the stoichiometric co-efficient (D) All of the above

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Last Answer : (D) All of the above

What is the name for a chemical reaction that builds up larger molecules? a. dehydration synthesis b. hydrolysis c. reactants d. products

Description : What is the name for a chemical reaction that builds up larger molecules? a. dehydration synthesis b. hydrolysis c. reactants d. products

Last Answer : a. dehydration synthesis

If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will (A) Increase (B) Decrease (C) Remain unaltered (D) Increase or decrease; depends on the particular reaction

Description : If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will (A) Increase (B) Decrease (C) Remain unaltered (D) Increase or decrease; depends on the particular reaction

Last Answer : (C) Remain unaltered

In a reversible chemical reaction (where, Δx = number of moles of products-number of moles of reactants) (A) Addition of inert gas favours the forward reaction, when Δx is positive (B) Pressure has no effect on equilibrium, when Δn = 0 (C) Addition of inert gas has no effect on the equilibrium constant at constant volume for any value of Δx (+ ve, - ve) or zero) (D) All 'a', 'b' & 'c'

Description : In a reversible chemical reaction (where, Δx = number of moles of products-number of moles of reactants) (A) Addition of inert gas favours the forward reaction, when Δx is positive (B) Pressure has no effect on equilibrium, when Δn = ... any value of Δx (+ ve, - ve) or zero) (D) All 'a', 'b' & 'c'

Last Answer : D) All 'a', 'b' & 'c'

What happens when a catalyst is added to a system at equilibrium? A The reaction follows an alternative pathway of lower activation energy. B The heat of reaction decreases. C The potential energy of the reactants decreases. D The potential energy of the products decreases. E The rate of chemical reaction decreases.

Description : What happens when a catalyst is added to a system at equilibrium? A The reaction follows an alternative pathway of lower activation energy. B The heat of reaction decreases. C The potential ... decreases. D The potential energy of the products decreases. E The rate of chemical reaction decreases.

Last Answer : A The reaction follows an alternative pathway of lower activation energy.

The rate of a chemical reaction can be affected by: w) temperature x) concentration of products y) concentration of reactants z) all of the above

Description : The rate of a chemical reaction can be affected by: w) temperature x) concentration of products y) concentration of reactants z) all of the above

Last Answer : ANSWER: Z -- ALL OF THE ABOVE

In protolytic reactions in which the reactants are much stronger as an acid and a base than the products, the proton transfer reaction: w) does not occur x) approaches completeness y) produces a much stronger acid and a much weaker base z) produces a much weaker acid and a much stronger base

Description : In protolytic reactions in which the reactants are much stronger as an acid and a base than the products, the proton transfer reaction: w) does not occur x) approaches completeness y) produces a much stronger acid and a much weaker base z) produces a much weaker acid and a much stronger base

Last Answer : ANSWER: X -- APPROACHES COMPLETENESS

The law of conservation of mass states that in a chemical reaction, matter can be created or destroyed true or false?

Description : The law of conservation of mass states that in a chemical reaction, matter can be created or destroyed true or false?

Last Answer : the answer for apex if False

True or false The law of conservation of mass states that in a chemical reaction, matter can be created or destroyed?

Description : True or false The law of conservation of mass states that in a chemical reaction, matter can be created or destroyed?

Last Answer : 1

A balanced chemical reaction equation conforms to the law of (A) Conservation of mass (B) Avogadro’s hypothesis (C) Gaseous volumes (D) None of these

Description : A balanced chemical reaction equation conforms to the law of (A) Conservation of mass (B) Avogadro’s hypothesis (C) Gaseous volumes (D) None of these

Last Answer : (A) Conservation of mass

An imbalanced chemical reaction equation is against the law of (A) Multiple proportion (B) Conservation of mass (C) Constant proportion (D) None of these

Description : An imbalanced chemical reaction equation is against the law of (A) Multiple proportion (B) Conservation of mass (C) Constant proportion (D) None of these

Last Answer : (B) Conservation of mass

The first law of thermodynamics is based on which of the following principles?  a. Conservation of mass  b. Conservation of energy  c. Action and reaction  d. The entropy-temperature relationship

Description : The first law of thermodynamics is based on which of the following principles?  a. Conservation of mass  b. Conservation of energy  c. Action and reaction  d. The entropy-temperature relationship

Last Answer : Conservation of energy

The first law of thermodynamics is based on which of the following principles?  a. conservation of mass  b. the enthalpy-entropy relationship  c. action – reaction  d. conservation of energy

Description : The first law of thermodynamics is based on which of the following principles?  a. conservation of mass  b. the enthalpy-entropy relationship  c. action – reaction  d. conservation of energy

Last Answer : conservation of energy

The first law of thermodynamics is based on which of the following principles?  A. Conservation of mass  B. Conservation of energy  C. Action and reaction  D. The entropy-temperature relationship

Description : The first law of thermodynamics is based on which of the following principles?  A. Conservation of mass  B. Conservation of energy  C. Action and reaction  D. The entropy-temperature relationship

Last Answer : Conservation of energy

If the total mass of the product in this chemical reaction is 14g what must the combined masses of the reactants be?

Description : If the total mass of the product in this chemical reaction is 14g what must the combined masses of the reactants be?

Last Answer : 4

What happens to the total mass of the reactants in a chemical reaction?

Description : What happens to the total mass of the reactants in a chemical reaction?

Last Answer : Need answer

Which of the following products are formed when 1-propanamine is treated with `NaNO_(2)+HCI`?

Description : Which of the following products are formed when 1-propanamine is treated with `NaNO_(2)+HCI`?

Last Answer : Which of the following products are formed when 1-propanamine is treated with `NaNO_(2)+HCI`? A. B. C. D.

25. In a reaction, A + B  Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants (A and B) are doubled, rate law for the reaction can be written as: (1) Rate = k[A]2 [B] (2) Rate = k[A] [B]2 (3) Rate = k[A]2 [B]2 (4) Rate = k[A] [B]

Description : 25. In a reaction, A + B  Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants (A and B) are doubled, rate law for the reaction can be ... Rate = k[A] [B]2 (3) Rate = k[A]2 [B]2 (4) Rate = k[A] [B]

Last Answer : Rate = k[A]2 [B] (

`CH_(3)CH_(2)CH(OH)CH(CH_(3))_(2)+CH_(3)COCI overset("base")rarr CH_(3)CH_(2)CH(OCOCH_(3))CH(CH_(3))_(2)+HCI` In the above reaction, if the reactant a

Description : `CH_(3)CH_(2)CH(OH)CH(CH_(3))_(2)+CH_(3)COCI overset("base")rarr CH_(3)CH_(2)CH(OCOCH_(3))CH(CH_(3))_(2)+HCI` In the above reaction, if the reactant a

Last Answer : `CH_(3)CH_(2)CH(OH)CH(CH_(3))_(2)+CH_(3)COCI overset("base")rarr CH_(3)CH_(2) ... the same configuration at the chiral atom D. be optically inactive

When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Description : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Last Answer : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is ... is formed which can be given as: A. B. C. D.

When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Description : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Last Answer : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt ... reaction. The final product is A. B. C. D.

When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Description : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Last Answer : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and ... gt R gt S` D. `S gt R gt Q gt P`

Optically active amine having molecular formula `C_(5)H_(13)N` on reaction with `NaNO_(2)+HCI` produces, `3^(@)` optically inative alcohol. Find out s

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The major end product (B) of the reaction: `overset(HCI)underset(ZnCl_(2))rarr A overset(1.NaCN("excess"))underset(2.H_(2),Ni)rarr B`

Description : The major end product (B) of the reaction: `overset(HCI)underset(ZnCl_(2))rarr A overset(1.NaCN("excess"))underset(2.H_(2),Ni)rarr B`

Last Answer : The major end product (B) of the reaction: `overset(HCI)underset(ZnCl_(2))rarr A overset(1.NaCN("excess"))underset(2.H_(2),Ni)rarr B` A. B. C. D.

The free energy change, AG (A) Is directly proportional to the standard free energy change, AG (B) Is equal to zero at equilibrium (C) Can only be calculated when the reactants and products are present at 1mol/1 concentrations (D) Is equal to –RT in keq

Description : The free energy change, AG (A) Is directly proportional to the standard free energy change, AG (B) Is equal to zero at equilibrium (C) Can only be calculated when the reactants and products are present at 1mol/1 concentrations (D) Is equal to –RT in keq

Last Answer : B

The equilibrium constant ‘K’ of a chemical reaction depends on (A) Temperature only (B) Pressure only (C) Temperature and pressure (D) Ratio of reactants

Description : The equilibrium constant ‘K’ of a chemical reaction depends on (A) Temperature only (B) Pressure only (C) Temperature and pressure (D) Ratio of reactants

Last Answer : (A) Temperature only

What is a change called in which the products are the same as the reactants?

Description : What is a change called in which the products are the same as the reactants?

Last Answer : This is a reversible reaction.

What are the reactants of photosynthesis What are the products?

Description : What are the reactants of photosynthesis What are the products?

Last Answer : The reactants for photosynthesis are carbon dioxide, light energy, water, and chlorophyll. The products are glucose, oxygen, and water.

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

Differentiate between: (a) Reactants and products (b) A balanced and an unbalanced chemical equation

Description : Differentiate between: (a) Reactants and products (b) A balanced and an unbalanced chemical equation

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The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products. PathwayA Pathway B 6 Pathway C 11 2 Glucose 1 5 10 12 7 4 8 3 Arrows numbered 4, 8 and 12 can all be (a) H2O (b) FAD+ or FADH2 (c) NADH (d) ATP.

Description : The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products. PathwayA Pathway B 6 Pathway C 11 2 Glucose 1 5 10 12 7 4 8 3 Arrows numbered 4, 8 and 12 can all be (a) H2O (b) FAD+ or FADH2 (c) NADH (d) ATP.

Last Answer : (d) ATP.

The internal energy of the combustion products is __________compared to that of reactants. (A) More (B) Less (C) Equal (D) More or less; (depends on the state of fuel.)

Description : The internal energy of the combustion products is __________compared to that of reactants. (A) More (B) Less (C) Equal (D) More or less; (depends on the state of fuel.)

Last Answer : (B) Less

Pick out the wrong statement. (A) In a batch reactor, which is exclusively used for liquid phase reactions; temperature pressure and composition may vary with time (B) In a semi-batch reactor, one reactant is charged batch wise, while the other reactant is fed continuously (C) In a continuous flow reactor, uniform concentration cannot be maintained throughout the vessel even in a well agitated system (D) In a continuous flow reactor, both the reactants and the products flow out continuously

Description : Pick out the wrong statement. (A) In a batch reactor, which is exclusively used for liquid phase reactions; temperature pressure and composition may vary with time (B) In a semi-batch reactor, ... system (D) In a continuous flow reactor, both the reactants and the products flow out continuously

Last Answer : (C) In a continuous flow reactor, uniform concentration cannot be maintained throughout the vessel even in a well agitated system