NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII05:SURFACE CHEMISTRY
320896
Gold number is associated with
1 electrophoresis
2 purple of cassius
3 protective colloid
4 amount of pure gold
Explanation:
Gold number is used to describe the protective power of different colloids.
CHXII05:SURFACE CHEMISTRY
320897
The precipitation power of an electrolyte increases with
1 rise in temperature
2 atomic radii
3 ionic radii
4 charge of an ion
Explanation:
The precipitation power of an electrolyte increases with charge of an ion. It can be explained on the basis of Hardy-Schulze rule. Greater the valence of the flocculating ion added, the greater is its power to cause precipitation.
MHTCET - 2019
CHXII05:SURFACE CHEMISTRY
320898
Gelatine protects :
1 Gold sol
2 \(A S_{2} S_{3}\) sol
3 \(\mathrm{Fe}(\mathrm{OH})_{3} \mathrm{sol}\)
4 All
Explanation:
Gelatin is a protective colloid.
CHXII05:SURFACE CHEMISTRY
320899
Gold number of gelatin is 0.05 . The amount of gelatin (in mg ) to be added to 100 ml of standard red gold sol to prevent coagulation by addition of 10 ml of \(\,\,\,{\rm{10}}\% \,\,{\rm{NaCl}}\) would be
1 0.25
2 0.5
3 1
4 1.5
Explanation:
10 ml of gold sol require gelatin=0.05 mg 100 ml gold sol require gelatin \(\begin{aligned}& =\dfrac{0.05 \times 100}{10} \\& =0.50 \,\mathrm{mg}\end{aligned}\)
Gold number is used to describe the protective power of different colloids.
CHXII05:SURFACE CHEMISTRY
320897
The precipitation power of an electrolyte increases with
1 rise in temperature
2 atomic radii
3 ionic radii
4 charge of an ion
Explanation:
The precipitation power of an electrolyte increases with charge of an ion. It can be explained on the basis of Hardy-Schulze rule. Greater the valence of the flocculating ion added, the greater is its power to cause precipitation.
MHTCET - 2019
CHXII05:SURFACE CHEMISTRY
320898
Gelatine protects :
1 Gold sol
2 \(A S_{2} S_{3}\) sol
3 \(\mathrm{Fe}(\mathrm{OH})_{3} \mathrm{sol}\)
4 All
Explanation:
Gelatin is a protective colloid.
CHXII05:SURFACE CHEMISTRY
320899
Gold number of gelatin is 0.05 . The amount of gelatin (in mg ) to be added to 100 ml of standard red gold sol to prevent coagulation by addition of 10 ml of \(\,\,\,{\rm{10}}\% \,\,{\rm{NaCl}}\) would be
1 0.25
2 0.5
3 1
4 1.5
Explanation:
10 ml of gold sol require gelatin=0.05 mg 100 ml gold sol require gelatin \(\begin{aligned}& =\dfrac{0.05 \times 100}{10} \\& =0.50 \,\mathrm{mg}\end{aligned}\)
Gold number is used to describe the protective power of different colloids.
CHXII05:SURFACE CHEMISTRY
320897
The precipitation power of an electrolyte increases with
1 rise in temperature
2 atomic radii
3 ionic radii
4 charge of an ion
Explanation:
The precipitation power of an electrolyte increases with charge of an ion. It can be explained on the basis of Hardy-Schulze rule. Greater the valence of the flocculating ion added, the greater is its power to cause precipitation.
MHTCET - 2019
CHXII05:SURFACE CHEMISTRY
320898
Gelatine protects :
1 Gold sol
2 \(A S_{2} S_{3}\) sol
3 \(\mathrm{Fe}(\mathrm{OH})_{3} \mathrm{sol}\)
4 All
Explanation:
Gelatin is a protective colloid.
CHXII05:SURFACE CHEMISTRY
320899
Gold number of gelatin is 0.05 . The amount of gelatin (in mg ) to be added to 100 ml of standard red gold sol to prevent coagulation by addition of 10 ml of \(\,\,\,{\rm{10}}\% \,\,{\rm{NaCl}}\) would be
1 0.25
2 0.5
3 1
4 1.5
Explanation:
10 ml of gold sol require gelatin=0.05 mg 100 ml gold sol require gelatin \(\begin{aligned}& =\dfrac{0.05 \times 100}{10} \\& =0.50 \,\mathrm{mg}\end{aligned}\)
Gold number is used to describe the protective power of different colloids.
CHXII05:SURFACE CHEMISTRY
320897
The precipitation power of an electrolyte increases with
1 rise in temperature
2 atomic radii
3 ionic radii
4 charge of an ion
Explanation:
The precipitation power of an electrolyte increases with charge of an ion. It can be explained on the basis of Hardy-Schulze rule. Greater the valence of the flocculating ion added, the greater is its power to cause precipitation.
MHTCET - 2019
CHXII05:SURFACE CHEMISTRY
320898
Gelatine protects :
1 Gold sol
2 \(A S_{2} S_{3}\) sol
3 \(\mathrm{Fe}(\mathrm{OH})_{3} \mathrm{sol}\)
4 All
Explanation:
Gelatin is a protective colloid.
CHXII05:SURFACE CHEMISTRY
320899
Gold number of gelatin is 0.05 . The amount of gelatin (in mg ) to be added to 100 ml of standard red gold sol to prevent coagulation by addition of 10 ml of \(\,\,\,{\rm{10}}\% \,\,{\rm{NaCl}}\) would be
1 0.25
2 0.5
3 1
4 1.5
Explanation:
10 ml of gold sol require gelatin=0.05 mg 100 ml gold sol require gelatin \(\begin{aligned}& =\dfrac{0.05 \times 100}{10} \\& =0.50 \,\mathrm{mg}\end{aligned}\)
