Chemistry Past Paper Questions

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Q 71:Specific heat capacity of water is:
A
4.2KJg-1K-1
B
4.2Jg-1K-1
C
2.4KJg-1K-1
D
2.4Jg-1K-1
Faisalabad, 2019
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Q 72:Substitution reactions is the characteristic of:
A
Alkanes
B
Alkenes
C
Alkynes
D
Ethene
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Q 73:The colour of Ca(OH)2 is:
A
Blue
B
Green
C
White
D
Red
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Q 74:The colour of iodine is:
A
Blue
B
Red
C
Green
D
Purple
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Q 75:The functional group -COOH is found in:
A
Carboxylic
B
Aldehydes
C
Alecohols
D
Esters
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Q 76:The difference between electronegativity of hydrogen and chlorine is:
A
1
B
2
C
3
D
4
Faisalabad, 2019
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Q 77:The example of colloid is:
A
Jelly
B
Chalk in water
C
Paints
D
Milk in magnesia
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Q 78:The formula of rust is:
A
Fe2O3 . nH2O
B
Fe2O3
C
Fe(OH)3 . nH2O
D
Fe(OH)3
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Q 79:The amount of energy given out when an electron is added to an atom is called:
A
Lattice energy
B
Ionization Energy
C
Electronegativity
D
Electron Affinity
Faisalabad, 2019
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Q 80:Spontaneous chemical reactions take place in:
A
Electrolytic Cell
B
Galvanic Cell
C
Nelson's cell
D
Down's Cell
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Total MCQs: 1548Page 8 of 155
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