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Author: Zabeehullah

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A compound contain 75% C and 25% H. It may be________

C2H2
C2H4
CH4
C6H6

Zabeehullah
Chemistry mcqs, Past Papers MCQs

A compound having a bond angle 180° is__________

alkyne
alkane
alkene
cycloalkane

Zabeehullah
Chemistry mcqs, Past Papers MCQs

A conductivity cell dipped in 0.01 M AgNO3, solution at 25 C gives the resistance of 1442 2 Ω. If the conductivity of the cell is 248 x 10 9 Ω-1 cm-1 the cell constant is…….

2.6 cm-1
3.0 cm-1
4.7cm-1
1.8 cm-1

Zabeehullah
Chemistry mcqs, Past Papers MCQs

A current of 5 amperes when passed through a solution of AgNO, for 20 minutes deposited 6-0 x 10 kg of Ag. The Z for Ag is equal to…

6000 gm/C
1.0x 10 gm/C
1.0x 10 kg/C
96500 gm/C

Zabeehullah
Chemistry mcqs, Past Papers MCQs

A catalyst is more effective in___________

Finely powdered state
Colloidal state
Rough surface
All of these

Zabeehullah
Chemistry mcqs, Past Papers MCQs

A coarse mixture is formed when the sizes of the constituent components are relatively…..

bigger
small
very small
all

Zabeehullah
Chemistry mcqs, Past Papers MCQs

A colliodal solution is kept in dark and is illuminated by a beam of light then brightness appears at the right angle of direction of light. This effect is called_________

Tyndall effect
Brownian effect
Hardy schulze effect
None of these

Zabeehullah
Chemistry mcqs, Past Papers MCQs

A colloidal system involves_______

A state of dissolution
A state of dispersion
A state of suspension
None

Zabeehullah
Chemistry mcqs, Past Papers MCQs

A common metal which can be used for the extraction of metals from their oxides by reduction is

Co
Al
C
Fe

Zabeehullah
Chemistry mcqs, Past Papers MCQs

16g of gas occupies 6 dm3 at S. T. P. The gas may be______

oxygen
molecules
both a and b
none

Zabeehullah
Chemistry mcqs, Past Papers MCQs

23 g of ethyl alcohol is dissolved in 54 g of water. The mole fraction of ethyl alcohol in water is…..

0.143
0.11
0.013
1.12

Zabeehullah
Chemistry mcqs, Past Papers MCQs

23 g of ethyl alcohol is dissolved in 54 g of water. The mole fraction of water in solution is…..

0.1429
0.8571
0.1872
0.3128

Zabeehullah
Chemistry mcqs, Past Papers MCQs

35% (W/W. solution of ethylene glycol in water is used as antifreezer in automobiles in radiators as a coolent it lowers the freezing point of water to -6″The mole fraction of ethylene glycol is….

0.927
0.378
0.8648
O.1351

Zabeehullah
Chemistry mcqs, Past Papers MCQs

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