Solved Chemistry MCQS Set 4

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Solved Chemistry MCQS


The relative rates of diffusion of a gas (molecular weight = 128) as compared to oxygen is
4-Jan
8-Jan
2-Jan
2 times

The unit rate of a reaction can be increased in general by all the factors except by
Using a catalyst
Increasing the activation energy
Increasing temperature
Increasing the conc. of reactants

Natural fertilizer provides potassium in the form of K2O (potash)
1.5 kg
3 kg
6.5 kg
4.5 kg

The rate of reaction between A and B increases by a factor of 100, and when the concentration with respect to A is increased 10 folds, the order of reaction w.r.t. A is
10
2
4
1

Among the alkaline earth metals the element forming predominantly covalent compounds is
Mg
Calcium
Be
Sr

In a crystal a?b?c, a =
Trigonal
Monoclinic
Tetragonal
Rhombic

The number of electrons in the M shell of the element with atomic number 24 is
24
12
13
8

The substance used as a smoke screen in warfare is
SiCl4
PCl5
PH3
Acetylene

The movement of solvent molecules through a semipermeable membrane is called
Cataphoresis
Osmosis
Electrophoresis
Electrolysis

Which one of the following compounds does not exist?
AsF5
NCl5
PF5
SbCl5

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