NEET Chemistry Surface Chemistry Question Bank

done Question - Assertion and Reason

 Read the assertion and reason carefully to mark the correct option out of the options given below : Assertion : When a finely divided active carbon or clay is stirred into a dilute solution of a dye, the intensity of colour in the solution is decreased. Reason : The dye is adsorbed on the solid surface.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : The enthalpy of physisorption is greater than chemisorption. Reason : Molecules of adsorbate and adsorbent are held by van der Waals forces in physisorption and by chemical bonds in chemisorption.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : Silica gel is used for drying air. Reason : Silica gel adsorbs moisture from air.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : According to Freundlich: $\frac{x}{m}k.{{P}^{1/n}}$. Reason : The isotherm shows variation of the amount of gas adsorbed by the adsorbent with temperature.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : A reaction cannot become fast by itself unless a catalyst is added. Reason : A catalyst always increases the speed of a reaction.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : ZSM ? 5 is used as a catalyst in petrochemical industries. Reason : Zeolites are three dimensional network silicates in which some silicon atoms are replaced by aluminium atoms.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : Lyophilic colloids are called as reversible sols. Reason : Lyophilic sols are liquid loving.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : Colloidal sols scatter light while true solutions do not. Reason : The particles in the colloidal sol more much slower than that of the true solution.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : Colloidal particles show Brownian movement. Reason : Brownian movement arises because of the impact of the molecules of the dispersion medium with the colloidal particles.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : For the coagulation of sols carrying positive charge, $PO_{4}^{3-}$ ions are more efficient than $SO_{4}^{2-}$or $C{{l}^{-}}$ions. Reason : This follows Hardy ? Schulze rule.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : An emulsion becomes stable if soap is added to it . Reason : Soap contains hydrophilic and hydrophobic parts.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : Deep electric shock causes death of an animal. Reason : Electric shock coagulate the blood. [AIIMS 1995]

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : A catalyst is more effective in finely divided form. Reason : Finely divided form has more surface area. [AIIMS 1998]

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : $N{{H}_{3}}$absorb more readily over activated charcoal than $C{{O}_{2}}$. Reason : $N{{H}_{3}}$is non-polar. [AIIMS 2000]

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : Sky appears blue colour. Reason : Colloidal particles of dust scatter blue light. [AIIMS 2000]

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : Physical absorption of molecules takes place on surface only. Reason : In this process, the bonds of the absorbed molecules are broken. [AIIMS 2002]

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : The micelle formed by sodium stearate in water has $-CO{{O}^{-}}$groups at the surface. Reason : Surface tension of water is reduced by the addition of stearate. [AIIMS 2003]

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : Aqueous gold colloidal solution is red in colour. Reason : The colour arises due to scattering of light by colloidal gold particles. [AIIMS 2004]

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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 Assertion : Increase in surface area, increase in rate of evaporation. Reason : Stronger the intermolecular attractive forces, fast is the rate of evaporation at a given temperature.

A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

C) If assertion is true but reason is false.

D) If the assertion and reason both are false.

E) If assertion is false but reason is true.

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