Chemistry/Chemistry MCQ Question - Reaction Kinetics Sample Test,Sample questions

Question:
A catalyst can not effect

1.Products

2.Chemical equilibrium

3.Reactants

4.both a & b


Question:
A substance which increases the reactivity of enzyme is called

1.Promoters

2.Inhibitors

3.Stimulators

4.Non-activators


Question:
Activated complex is formed due to

1.Pressure

2.Effective collision

3.Ineffective collisions

4.Temperature


Question:
Addition of tetraethyl lead in petrol is example of

1.ve catalysis

2.?ve catalysis

3.auto catalysis

4.anti catalysis


Question:
Aluminium oxide is

1.Acidic oxide

2.Basic oxide

3.Amphoteric oxide

4.It does not exists


Question:
An enzyme has its specificity due to

1.Substrate

2.Structure

3.Temperature

4.Pressure


Question:
Anything which increases rate of reaction without being involved in the reaction

1.Promoter

2.Catalyst

3.Inhibitor

4.All of the above


Question:
Aqueous solution of borax above 62?C gives crystals of

1.Na2B4O7.4H2O

2.Na2B4O7.5H2O

3.Na2B4O7.2H2O

4.Na2B4O7.10H2O


Question:
Because of its ability to combine with both oxygen and nitrogen aluminium metal is used

1.As nitrometer

2.To remove air bubbles from molten metal

3.To produce alloy

4.As insulator


Question:
Biocatalytical proteins are

1.Enzymes

2.Substrate

3.Lipids

4.any of above


Question:
Borax is a white crystalline solid and it is

1.More soluble in cold water

2.More soluble in hot water

3.Insoluble in water

4.Soluble only in organic solvents


Question:
Boron in soil has been considered micronutrient for

1.Soil porocity

2.Proper growth of plants

3.Alkalinity of soil

4.All


Question:
Boron is non metal while other elements of IIIA group are metals. This is because

1.it has small size

2.it has high nuclear charge

3.it forms molecular addition compounds

4.all of the above


Question:
Boron is non-netal whereas A1 is metal. It is due to

1.Small size

2.High nuclear charge

3.Both a and b

4.No authorized justification yet


Question:
Co-enzymes are

1.Non proteineous

2.Proteineous

3.sugars

4.lipids


Question:
CO2 is gas while SiO2 is solid at room temperature.

1.carbon is non-metal while silicon is semi-metal

2.CO2 is an independent molecule while SiO2 has network covalent structure

3.CO2 forms multiple bond while silicon does not form multiple bonds

4.Silicon has all sigma bonds


Question:
Each catalyst has

1.Specificity

2.Special structure

3.Its own Ea

4.all of above


Question:
End name of enzyme is

1.yl

2.ase

3.one

4.al


Question:
Energy of activation for backward reaction is less than forward reaction for ________ reaction

1.Endothermic

2.Exothermic

3.Moderate

4.Fast


Question:
Energy of reactant higher than energy of product favours

1.Endothermic

2.Exothermic

3.Moderate reaction

4.No reaction


Question:
Energy required to form transition state is called

1.Ea

2.P.E

3.V

4.K.E


Question:
For 3rd order reaction the hhalf life is inversely proportional to initial concentration of reactants

1.Single

2.Square

3.Cube

4.Raise to power four


Question:
For determining the order of reaction we use

1.Refractometric method

2.Dilatometric method

3.Optical activity method

4.Half life method


Question:
Greater the conc. Of reactant

1.Greater will be dx/dt

2.Lesser will be dx/dt

3.dx/dt will be moderate

4.any of above


Question:
In network of silica (SiO2) each silicon atom is surrounded by _________ atoms of osygen

1.4

2.2

3.1

4.6


Question:
One of the outstanding features of boron is its ability to form

1.Molecular addition compounds

2.Molecular crystals

3.Semiconductors

4.Ionic compounds


Question:
Order of reaction of 2N2O5 ? 2N2O4+O2 is

1.First order

2.Second order

3.Third order

4.zero order


Question:
Orthoboric acid is 2.6% soluble in water at 40?C and ________at 107?C.

1.26%

2.27%

3.37%

4.<2.6%


Question:
Radiations are absorbed in

1.Spectrophotometer method

2.Dilatometric method

3.Optical relation method

4.Refractometric method


Question:
Silicon differ from silica by a group of

1.Ch3

2.?OH

3.OCH3

4.O2


Question:
Special features of borate glass is that it is

1.Heat resistant

2.Low melting

3.Used to prepare chemical garden

4.Green in colour


Question:
Substance which is found in dried up lakes of Tibet and California is

1.Tincal

2.Boric acid

3.Calcium carbonate

4.Colemanite


Question:
The coloured glassy mass in borax bead test is due to the formation of

1.metal borate

2.metal meta borate

3.metal boride

4.metal silicate


Question:
The metal which is used in thermite process because of its activity is

1.iron

2.copper

3.aluminium

4.zinc


Question:
The process of aluminium extraction is called

1.Hall process

2.Thermite process

3.Haber process

4.Contact process


Question:
The substances that reduces the effectiveness of a catalyst are called

1.Promoters

2.Poisoning catalysts

3.Inhibitors

4.pro-catalysts


Question:
The unit of slope in Arrhenius plot to calculate the energy of activation is

1.K-1

2.?F

3.K

4.?C


Question:
Tincal is a mineral of

1.A1

2.Si

3.B

4.C


Question:
When a product acts as catalyst then it is called

1.Autocatalsis

2.?ve catalysis

3.ve catalysis

4.self catalysis


Question:
When catalysts and reactants are in more than one phase it is

1.Homogeneous catalysis

2.Heterogeneous catalysis

3.Catalysis

4.Ea


Question:
When the reaction completes in more than one steps rate of reaction will be determined by

1.Fast step

2.Slowest step

3.All steps

4.Molecularity of the reaction


Question:
Which electronic configuration corresponds to an element of group IIIA?

1.1s2 2s2 2p3

2.1s2 2s2 2p6 3s2 3p1

3.1s2 2s2 2p4

4.1s2 2s2 2p6 3s2 3p6 4s2 3d1


Question:
Which of the following does not give Borax bead test?

1.Cu

2.Cr

3.Ni

4.A1


Question:
Which of the following is not a use of silicon?

1.Lubricants

2.Hydraulic brakes

3.Antifreeze

4.Water repellent


Question:
Which of the following shows inert pair effect?

1.boron

2.carbon

3.silicon

4.tin


Question:
Which of the following type of reaction is 3rd order reaction

1.2N2O5 = 2N2O4 + O3

2.NO + O3 ? NO2 + O2

3.2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2

4.None of these


Question:
Which of the following will have very high rate of reaction?

1.Double decomposition reaction

2.Neutralization reaction

3.Ionic reactions

4.all of above


Question:
Which one of the following is not a semiconductor?

1.Si

2.Ge

3.Se

4.Sn


Question:
Which order of reaction obeys the relation t1/2 = 1/Ka

1.First order

2.Second order

3.Third order

4.Zero order


Question:
Which statement is incorrect about catalyst

1.it is used in smaller amount

2.decrease activation energy

3.specific in action

4.it affects specific rate constant


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