Q. At a concentration of , a detergent solution becomes a colloidal solution. On an average colloidal particles are present in . Calculate the average number of ions contained in one colloidal particle (micelle)? [ Given ]

NTA AbhyasNTA Abhyas 2020 Report Error

None of these

Solution:

No. of sodium lauryl sulphate in litre solution
=
=
No. of sodium lauryl sulphate per =
No. of colloidal particles per =
No. of molecules per colloidal particle

=

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1. Volume of required to neutralize of is

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2. The lanthanide contraction is responsible for the fact that

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3. The alkene C₆H₁₀ producing OHC(CH₂)₄CHO on ozonolysis is:

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4. The final step for the extraction of copper from copper pyrite in Bessemer converter involves the reaction-

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5. Consider the following diazonium ions :

The order of reactivity towards diazo-coupling with phenol in the presence of dil. NaOH is -

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1. If for a certain reaction is at , the value of (in for which the same reaction will be spontaneous at the same temperature is

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3. At standard conditions, if the change in the enthalpy for the following reaction is Given that bond energy of and is and , respectively, what is the bond energy (in of ?

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4. An organic compound contains (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of is is ]

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5. The density of 2 M aqueous solution of NaOH is 1.28 g/cm. The molality of the solution is
[Given that molecular mass of NaOH = 40 g mol]

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6. Given below are half cell reactions:

Will the permanganate ion, liberate from water in the presence of an acid ?

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7. In water saturated air the mole fraction of water vapour is . If the total pressure of the saturated air is , the partial pressure of dry air is :

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8. Following limiting molar conductivities are given as

for will be-

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9. One atom of an element weighs . Its atomic mass is

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10. In the following reaction,
A,
the number of sigma(s) bonds present in the product A is :-

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