Chemical Equilibrium:

Point out the co efficient in the following hypothetical reaction

2A+3 D   —>   4C+8D

In the beginning, the reverse reactions are ________

When a system is at equilibrium states?

At equilibrium state the physical properties like density, color etc. are _____________

The characteristics of reversible reactions are the following except____

In direction of a reaction, reaction is at equilibrium then_____________

In chemical reactions the substances that combine are called _________

Nitrogen and oxygen gasses are being used to manufacture chemicals, since the advent of_____ century

The oxidation of carbon monoxides goes to completion at _____________

In the lime kiln, the reaction CaCO₃(g) —> CaO(g) + CO₂(g) goes to completion because____

• Of high temperature
• CaO is more stable then CaCO₃
• CO₂ escapes continuously
• CaO is not dissociated

Which Option is Correct

Reverse reaction take place from____________

Irreversible reaction consists of_________

When a reaction ceases to proceed further, it is called_____________

Which Option is Correct

Reaction quotient is expressed as_____________

For reactions having large Kc Value, the reaction proceeds to _________

By knowing the value of equilibrium constant ____________can be predicted.

Nitrogen and hydrogen were reacted together to make ammonia N₂ + 3H₂ —> 2NH₃ where Kc=2.86mol^-2 dm⁶, what will be present in the equilibrium mixture?

• NH₃ only
• N₂, H₂ and NH₃
• N₂ and H₂ only
• H₂ only

Which Option is Correct ?

Equilibrium constant value “Kc” is equal to__________

Name the reactants in this equation

2H₂ +O₂   —> 2H₂O

• H₂O
• H₂ & O₂
• O₂
• None of these

Select One Options

An active mass is considered as the molar concentrations in units of__________

• mol dm^-3
• mol^-3 dm
• mol^-2 dm
• mol^-2 dm

Which Option is Correct ?

When the magnitude of Kc is very large it indicates___________

Forward reaction takes place from______________

Which chemical is called king of chemicals?

• KNO₃
• H₂SO₄
• HCl
• NHO₃

Which Option is Correct ?

An equilibrium is achievable only in ___________________

The reaction in which all the reactants have been converted into products are known as__________

There are ___________major components of atmosphere.

As the numeric value of Qc (8.0) is less than Kc (57.0) then the reaction is not_____________

Numerical value of Kc predicts_____________

There are ___________ possibilities at equilibrium state.

The units of molar concentration_____________

• Mol dm^-2
• mol dm^-1
• mol dm
• mol dm^-3

Which Option is Correct ?

The color of iodine is______

Which type of reactions do not go to completion?

Reversible reaction____________

The characteristics of inversible reaction are the following except_____________

Which type of reactions speed up gradually?

Which one of the following statements is not correct about active mass?

Gases are being used to manufacture____________

The two major components of atmosphere are ___________

At dynamic equilibrium__________

When H₂ and O₂ combine they form__________

• H_2O
• H and O
• HO₂
• None of these

Select Correct Option?

Many environmental systems depend for their_____________

For a reaction between PCI₃ and Cl₂ to form PCI₅, the units of Kc are______________

• Mol dm^-3
• mol^-1 dm^-3
• mol^-1dm³
• mol dm³

Which Option is Correct ?

Irreversible reaction represented by a ____________ between a reactant and a product.

The Name of the scientist who presented law of mass action is ______________

In a chemical reaction, the substance that combine are called ________

In extent of reaction, the reaction goes to completion have__________

When the reaction ceases to proceed, it is called_________

Reactions which have comparable amount of reactants and products at equilibrium state have_______

Which gas is used to manufacture king of chemicals sulphuric Acid?

• N₂
• O₂
• Cl₂
• S

Which Option is Correct ?

Which is the king of chemicals?

The ratio of product concentration of products raised to power of co-efficient to the products of reactant raised to the power co-efficient is known as_________

Oxygen is used to prepare_______________

Which type of reactions take place in both directions?

The reaction in which the products can recombine to form reactants are called______

Nitrogen and oxygen constituents ________of the atmosphere

Equilibrium Constant has no unit when number of moles of reactants and products are_____

Nitrogen is used to prepare _______________

The Color of hydrogen iodide is___________

The forward reaction takes place__________

The lives of aquatic animals and plants are indirectly related to concentration of ___________ dissolved in water.

In extent of reaction, the reaction never goes to completion, which have____________

The reaction in which the products do not recombine to form reactants are called____________

Ammonia gas is used to manufacture__________

Guldburg and Waage’s put forward law of mas action in_______

At initial stage the rate of forward reaction is______________

At equilibrium the rate of forward and reverse reaction becomes_____

When the rate of the forward reaction takes place at the rate of reverse reaction the composition of the reaction mixture remains constant it is called_________

There are ____________ characteristics of dynamic Equilibrium.

When H₂ and I₂ combine they form ____________

• H_2O
• HI
• I₂
• H₂ & I₂

which Option is Correct ?

Which gas is used to prepare ammonia?

• N₂
• O₂
• Cl₂               
• S

Which Option is Correct ?

In direction of a reaction, reaction proceeds forward then______________

Reversible reactions take place in__________

In direction of a reaction, reaction proceeds reverse then___________

The reaction quotient is useful because it predicts the direction of reaction by comparing the value of_______

Reverse reactions gradually ______________

The %age of nitrogen and oxygen in our atmosphere is_________

When CaO reacts with CO₂ they produce_________

• CaCO₃
• CaCO₂
• Both CaCO₃ & CaCO₂
• None of these

Which Option is Correct?

Reaction in which reactants react to form products called__________

Dynamic means, reaction is__________

In an irreversible reaction dynamic equilibrium ______

A reverse reaction is one that_______

When the magnitude of Kc is very small it indicates_____________

For the reactions H₂ + I₂ —> 2HI, the reactions quotients for this reaction is___________

Rate of forward reactions takes place at the rate of reverse reaction, the composition of the reaction mixture remains constant is called ____________

There are ___________possibilities of predicting extent of reaction.

Sulphur dioxide is used to manufacture_____________

The two major components of atmosphere are ____________

There are ___________possibilities of predicting extent of reaction.