Chemistry - General Knowledge Questions and Answers

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Which one of the following gases has the highest calorific value?

Natural gas

Water gas

Coal gas

Indane gas

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When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in

Raman spectra

Absorption spectra

Emission spectra

Fluorescence

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If the equilibrium constants for the systems H₂ + I₂ -> 2HI and 2HI -> H₂ + I₂ are K₁ and K₂ respectively, the relationship between K₁ and K₂ is :

K₁ = K₂

K₁ = 2K₂

K₁ = K₂/2

K₁= 1/K₂

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The influence of temperature on reaction rate is predicted by

Van der Waals equation

Kirchhoff's equation

Arrhenius equation

Lewis equation

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Which among the following is used as a catalyst in the production of high octane fuels?

HNO₃

H₂SO4

HCl

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Catalytic converters are generally made from :

Alkaline metals

Hydrogen

Transition metals

Carbon

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Which of the following is colourless?

Chlorine

Oxygen

Phosphorus

Sulphur

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Iodine value is used to estimate

Hydroxyl groups in oil

Alkali content in oil

Unsaturation in oil

Carboxylic groups in oil

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The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

Xenon

Krypton

Argon

Helium