Chemistry-
General
Easy

Question

If the absorbate is held on a surface by weak Vander Waal's forces, the absorption process is called

  1. Physical adsorption   
  2. Chemical adsorption  
  3. Heat of adsorption  
  4. Enthalpy of adsorption  

The correct answer is: Physical adsorption

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Assertion:Galvanised iron does not rust.
Reason :Zinc has a more negative electrode potential than iron.

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Reason:Zinc is more electropositive than gold.

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Assertion:Wolframite impurities are separated from cassiterite by electromagnetic separation.

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Assertion:Levigation is used for the separation of oxide ores from impurities.

Assertion:Levigation is used for the separation of oxide ores from impurities.

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Assertion:Leaching is a process of reduction.
Reason:Leaching involves treatment of the ore with a suitable reagent so as to make it soluble while impurities remains insoluble.

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Assertion:Zinc is used and copper is not used in the recovery of A g from the complex left square bracket A g left parenthesis C N right parenthesis subscript 2 end subscript right square bracket to the power of minus end exponent.
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