MCQs of Chapter # 10 [Thermochemistry]

 

Chemistry IX

MCQs [Chapter# 10]

 

i.                    Thermochemistry deals with:

a.       Heat evolved during reaction

b.      Heat absorb during reaction

c.      Both of these

d.      None of these

 

ii.                 Heat evolved during:

a.      Exothermic reaction

b.      Endothermic reaction

c.       Both of these

d.      None of these

 

iii.               Bond usually breaks in:

a.       Exothermic reaction

b.     Endothermic reaction

c.       Both of these

d.      None of these

 

iv.                ΔH is negative in:

a.      Exothermic reaction

b.      Endothermic reaction

c.       Both of these

d.      None of these

 

v.                  In this reaction, total energy of the system decreases:

a.      Exothermic reaction

b.      Endothermic reaction

c.       Both of these

d.      None of these

 

vi.                If enthalpy of product is greater than enthalpy of reactant than the sign of enthalpy will be:

a.      Positive

b.      Negative

c.       Neutral

d.      Depends on reaction

 

vii.             ∆H can be calculated by:

a.       Thermometer

b.     Calorimeter

c.       Potentiometer

d.      All of the above

 

viii.           Combustion, addition, neutralization, single displacement reactions are the examples of:

a.      Exothermic reaction

b.      Endothermic reaction

c.       Catenation

d.      Cracking

MCQs of Chapter # 09 [Acids, Bases and Salts] Class IX

 

Chemistry IX

MCQs [Chapter# 09]

 

i.                    Which of the following is not feature of Acids?

a.       They have sour taste

b.      Aqueous acids can conduct electricity

c.       They react with bases to form salt and water

d.     They change the color of red litmus paper to blue

 

ii.                 When acids react with metal, it happens:

a.      Hydrogen gas produces

b.      Oxygen gas produces

c.       Chlorine gas produces

d.      Depend on reaction

 

iii.               Which of the following is not feature of Bases?

a.       They have bitter taste

b.      Aqueous bases can conduct electricity

c.       They react with bases to form salt and water

d.     They change the color of blue litmus paper to red

 

iv.                According to Bronsted Lowry:

a.      Acids can donate protons

b.      Acids can accept pair of electrons

c.       Acids yields H⁺ ion when dissolve in  aqueous solution

d.      All of the above

 

v.                  Neutralization is example of:

a.       Double displacement reaction

b.      Exothermic reaction

c.       Endothermic reaction

d.     Both a and b

 

vi.                Salts having ‘H’ are:

a.      Acidic salts

b.      Basic salts

c.       Neutral salts

d.      Normal salts

 

vii.             In Castner Kellner cell, the anode is made up of:

a.      Titanium

b.      Graphite

c.       Mercury

d.      Brine

viii.           Following are the advantages of Castner Kellner cell except:

a.       Efficient process

b.      NaOH is obtained in separate chamber

c.       Pure NaOH is obtained

d.     High consumption of electricity

 

ix.                Brine is actually solution of:

a.      Sodium chloride

b.      Sodium bromide

c.       Sodium iodide

d.      Sodium fluoride

 

x.                  Sodium carbonate is used in:

a.       Fire extinguishers

b.      Ceramics industries

c.       Medicine

d.     All of the above

 

xi.                Oil of vitriol is:

a.      CuSO₄

b.      H₂SO₄

c.       H₃PO₄

d.      HNO₃

 

xii.             Epsom salt is common name of:

a.      Magnesium sulphate

b.      Calcium sulphate

c.       Ammonium sulphate

d.      None of these

 

xiii.           Alum is used in:

a.       Sizing of paper

b.      Medicines

c.       Purifying water

d.     All of these

MCQs of Chapter # 08 [Electrochemistry] Class IX

 

Chemistry IX

MCQs [Chapter# 08]

 

i.                    It can conduct electric current:

a.       Benzene

b.      Sugar solution

c.      HCl

d.      Petrol

 

ii.                 Electrolysis is useful in:

a.       Extraction of metals

b.      Electroplating

c.      Both of these

d.      None of these

 

iii.               Electricity can passed from:

a.       Solid NaCl

b.      Liquid NaCl

c.      Molten NaCl

d.      All of the above

 

iv.                Pure water can conduct current only when:

a.       Few drops of acids are added

b.      Few drops of bases are added

c.      Both of these

d.      No change

 

v.                  Electrochemical equivalent is denoted by:

a.       A

b.      E

c.       EE

d.     Z

 

vi.                1 Faraday =

a.       95500 C

b.     96500 C

c.       97500 C

d.      98500 C

 

vii.             SI unit of  electrochemical equivalent is:

a.       gm/C

b.     Kg/ C

c.       mg/C

d.      ng/ C

 

viii.           The object which is to be coated is placed at:

a.      Cathode

b.      Anode

c.       Can be placed anywhere

d.      None of these

 

ix.                Salt bridge:

a.      Prevents mixing of two solution

b.      Enhances mixing of two solutions

c.       Provoke mixing of two solution

d.      None of these

 

x.                  Galvanic cell:

a.       Irreversible cell

b.      Primary cell

c.       Convert chemical energy to electrical energy

d.     All of the above

 

xi.                Dry cell is/are used in:

a.       Flash lights

b.      Calculators

c.       Clocks

d.      All of the above

 

xii.             Which of the following is characteristic feature of lead storage battery?

a.       It is used in automobiles

b.      It is a reversible cell

c.       It is a secondary cell

d.     All of these