Chemistry MCQS with Answers Set 1

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Chemistry MCQS with Answers for NTS


Which of the following has greatest reducing power?
HCI
HI
HI
Hbr

Cheif air pollutant which is likely to deplete ozone layer
Carbon dioxide
Sulphure dioxide
Carbon dioxide
Nitrogen oxides and chloro fluorocarbons

SO2 and NO2 pollution by increasing
Acidity
Alkalinity
Buffer action
Neutrality

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

In the equilibrium N2 + 3H2 – 2NH3 + 22 kcal the formation of ammonia is favoured by
Increasing the pressure
Adding ammonia
Increasing the temperature
Decreasing the pressure

If the solvent is inflammable for heating purpose we use
Wire gauze
Thermostat
Ice bath
Water bath

A zero order reaction is one whose rate is independent of
Temperature of the reaction
The concentration of the products
The concentration of the reactants
The material of the vessel in which the reaction is carried out

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to
Electrolysus
Oxidation
Hydrolysis
Hydrogenation

Which has the largest radius?
Cr3+
Mn3+
Fe3+
CO3+

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
Sulphur oxide
Lead
Nitrogen oxide
Mercury
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