Difficult
Which of the following reactions leads to the formation of a substance in the colloidal state (in the presence of excess of $HCl$)?
- A$Cu + HgCl_2 \to CuCl_2 + Hg$
- B$2HNO_3 + 3H_2S \to 3S + 4H_2O + 2NO$
- C$2Mg + CO_2 \to 2MgO + C$
- D$Cu + CuCl_2 \to Cu_2Cl_2$
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The $Purple \ of \ Cassius$ is $......$.
Easy
View SolutionAssertion: Animal skins are colloidal in nature.
Reason: Animal skin has positively charged particles.
Reason: Animal skin has positively charged particles.
Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$ : The diameter of colloidal particles in solution should not be much smaller than the wavelength of light to show Tyndall effect.
Reason $R$ : The light scatters in all directions when the size of particles is large enough.
In the light of the above statements,choose the correct answer from the options given below:
Assertion $A$ : The diameter of colloidal particles in solution should not be much smaller than the wavelength of light to show Tyndall effect.
Reason $R$ : The light scatters in all directions when the size of particles is large enough.
In the light of the above statements,choose the correct answer from the options given below:
Which of the following is an example of a multi-molecular colloid?
An example of a solid sol is
DifficultJEE MAIN 2019
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