Given below are a few electrolytes, indicate which one among them will bring about the coagulation of a gold sol quickest and in the least of concentration ?
`NaCl`,
`MgSO_(4)`,
`Al_(2)(SO_(4))_(3)`,
`K_(4)[Fe(CN)_(6)]`.
what is the correct sequence of the decreasing coagultion value of the following electrolyte for the coagultion of ferric hydroxide sol ? (I) Na_(3) PO_(4) (II)KCl (III) K_(2)SO_(4) (IV)K_(4)[Fe(CN)_(6)]
Under the influemce of an electric field, the particles in a sol migrate towards cathode. The coagulation of the same sol is studied using NaCl,Na_(2)SO_(4) , and Na_(3)PO_(4) solutions. Their coagulation values will in the order a. NaClgtNa_(2)SO_(4)gtNa_(3)PO_(4) b. Na_(2)SO_(4)gtNa_(3)PO_(4)gtNaCl c. Na_(3)PO_(4)gtNa_(2)SO_(4)gtNaCl d. Na_(2)SO_(4)gtNaClgtNa_(3)PO_(4)
each question constain STATEMENT-1(Assertion ) and STATEMENT - 2 (reason). examine the statement carefully and work the correct answer accoridng to the instructions given below : STATEMENT-1: For coagulation of positively charged sols, [Fe(CN)_(6)]^(4-) ion has higher coagulating power than that of PO_(4)^(3-),SO_(4)^(2-),Cl^(-) STATEMENT-2: The size of colloidal particle are larger than the size of true solution particles.
Some pictures (a) to ( c) are given below. Tell which of them show: 3xx3/4 = 2 1/4
A 1 litre solution containing NH_(4)Cl and NH_(4)OH has hydroxide ion ion concentration of 10^-6) mol//litre. Which of the following hydroxides could be precipitated when the solution is added to 1 litre solution of 0.1 M metal ions? (I) Ba(OH)_(2)(K_(sp)=5xx10^(-3)) , (II) Ni(OH)_(2)(K_(sp)=1.6xx10^(-16)) (III) Mn(OH)_(2) (K_(sp)=2xx10^(-13)) , (IV) Fe(OH)_(2) (K_(sp)=8xx10^(-16))
True or False : Al(NO_3)_3 has higher coagulating power than MgSO_4 for Fe(OH)_3 sol.
Arrange the following electrolytes in the increasing order of coagulation power for the coagulation of As_(2)S_(3) sol : K_(2)SO_(4) " " CaCl_(2)" " Na_(3)PO_(4) " " AlCl_(3) : Ilt II lt IIIlt IV , I=III lt II lt IV , II lt IV lt I lt II , II lt III lt IV lt I .
Given the following K_(a) values, determine which species is the strongest base ? HSO_(4)^(-)=1.2xx10^(-2),H_(2)PO_(4)^(-)=6.3xx10^(-8),HCO_(3)^(-)=4.7xx10^(-11)
Following reaction describes the rusting of iron 4Fe+3O_(2) rarr 4Fe^(3+)+6O^(2-) Which one of the following statements is incorrect?
In a coagulation experiment, 5 mL of As_2S_3 is mixed with distilled water and 0.1M solution of an electrolyte AB so that total volume is 10 mL. It was found that all solutions containing more than 4.6 mL of AB coagulate within 5 minutes. What is the flocculation value of AB for As_2S_3 sol. ?
