NEET UG CHEMISTRY MCQ: SURFACE CHEMISTRY

1 Medium

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Analyzing +4 | -1

Assertion (A): When

{SnO}_2

is reacted with

{NaOH}

, then its sol. particles are attracted towards cathode.

Reason (R): When

{SnO}_2

is reacted with

{NaOH}

, then it gives

{SnO}_3^{2-}

which is absorbed by

{SnO}_2

, so it is negatively charged sol.

View answer and explanation

Correct option: D

(A) is false but (R) is true

Option D is correct because the assertion is false (particles move towards anode), but the reason is true (SnO2 absorbs SnO3^2- making it negatively charged).

More Questions from SURFACE CHEMISTRY

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A cationic colloidal electrolyte forms micelle at

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2 \times 10^{13}

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\mathrm{N}_{\mathrm{A}}=6 \times 10^{23}

. Graph between

\log \frac{{x}}{{m}}

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\log {P}

is a straight line inclined at an angle

\theta=45^{\circ}

. When pressure is

0.5

atm and

\log {k}= 0.699,

the amount of solute adsorbed per

\mathrm{g}

of adsorbent will be: For adsorption of gas on solid surface, the plots of

\log \;x/m\mathrm{ } \;vs.

\log \;P

is linear with a slope equal to : Most suitable salt which can be used for efficient clotting of blood will be The density of gold is

19\;\mathrm{g/c}{\mathrm{m}^3}

. If

{1.9 \times {{10}^{ - 4}}\;\mathrm{g}}

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