9th Class Chemistry Chapter Wise Online MCQ Test With Answers PDF English Medium

Chemistry 9th Class English Medium Online Test

Sr. #	Questions	Answers Choice
1	In an irrversibel reaction equilibrium	Never establised Established quickly Established slowly Established when reaction stops
2	What will hapen to the concentrations of the prodcut if a reversible reaction at eqiulibrium is not distrubed.	They will keepon increasing They will keep on decreasing They will remain constant They willremain constant for some time and then start decreasing
3	If reversibe reaction useful for preparing compounds on large scale.	Yes No They are useful only when equilirbium lies far to the left side They are useful only when equilibrium lies far to the right side
4	When a reaction will be come a reversible one?	If the actvation eneryg of the forward reaction is comparrble to that of backward reaction If the activation energy of the forward reaction is higher than that of backward reaction If the activationenergy of the forward reaction is lower than that of backward reaction If the enthalpy change of both the reactions is zero.
5	In an irreversibel reaction equiirbrium is.	The forward reaction will be fovoured No effect on forward or backward reaction No effect on bakcwars reaction The backward reaction will be favoured
6	Why the gas starts coming out when you open a can of fizzy drink.	Because gteh solubiliyt of the gas increases Because the gas is dissolved under pressure hence it comes out when pressur eis decreased Becaue the gas is insoluble in water Because the solubility of hte gas decreases at high pressure.
7	What conditon Should be met for the reversible reactio to achieve the state of equilibrium.	The concentratio of all the reactants and the prodduct should become constant all the reactants should be converted into the product 50% of the reactant shuld be converted into prodcuts. One of the product should be removed from the reaction mixture.
8	CaO or lime is used extensive in steel, glass and paper industries. It is produced inan exothermic reversitble reaction by the decompositon of lie . Choose the conditions to produce maximum amount of lime.	Heating at high temperatur ein an open vessel Heating at high temperatur ein a closed vessel Cooling it in a closed vessel Colling it in an open vessel
9	An Inorganic chemistry places one mle of PCl5 in container A and one mole of each Cl2 and PCl3 in container B. Both the containers were sealed and heated to the same temperture to reach the stte of equilibrium Guess about the composition of mixtures in both the containers.	Both the containers wil have zero concentration of its reactants. Both the containers wil hae the same composition of mixtures Container A will have more concentraion of PCl3 than B. Container A will have less concentraion of PCl3 than B.
10	Predict which components of the amosphere react in the presence of lightening.	N2 and H2O O2 and H2O N2 and O2 CO2 and O2
11	What will happen if the rates of forward and reverse reactions are very high	The reaction will be practiclly irreversible The equilibrium point will reach very soon The equilibiurm point will reach very late The reaction will not attain the state of dynamic equilibrium
12	During the glycolysis net ATP produced are.	2 4 6 8

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