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Montreal protocol which calls for approp...

Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year

A

1987

B

1988

C

1985

D

1986

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The correct Answer is:
A
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Following passage describes charcterstics of colloids. Answer the questions at the end of it. Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which forms a protective layer outside it and thus prevents it from forming associated colloids. Lyophillic colloidal sols also protect lyophobic colloidal sols from precipition by the action of electrolytes. This is due to formation of a protective layer by lyophilic sols outside lyophobic sols. Lyophilic colloidal sols are called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulaion on the addition of sodium chloride solution. Protective powers of different colloidal sols are measured in terms of 'gold number' (Zigmody). It is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of 10 percent sodium chloride. Thus smaller the gold number of a lyophillic sol, the greater is the protective power. Gold number of haemoglobin is 0.03. Hence, 10 mL of gold sol will require haemoglobin so that gold is not coagulated by ImL of 10% NaCl solution

Following passage describes charcterstics of colloids. Answer the questions at the end of it. Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which forms a protective layer outside it and thus prevents it from forming associated colloids. Lyophillic colloidal sols also protect lyophobic colloidal sols from precipition by the action of electrolytes. This is due to formation of a protective layer by lyophilic sols outside lyophobic sols. Lyophilic colloidal sols are called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulaion on the addition of sodium chloride solution. Protective powers of different colloidal sols are measured in terms of 'gold number' (Zigmody). It is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of 10 percent sodium chloride. Thus smaller the gold number of a lyophillic sol, the greater is the protective power. [AgI]I^(-) collodial sol can be coagulated by the addition of a suitable cation. 1 mol of [Agl]I^(-) requires mol of AgNO_3, Pb(NO_3)_2 and Fe(NO_3)_3 as

Following passage describes charcterstics of colloids. Answer the questions at the end of it. Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which forms a protective layer outside it and thus prevents it from forming associated colloids. Lyophillic colloidal sols also protect lyophobic colloidal sols from precipition by the action of electrolytes. This is due to formation of a protective layer by lyophilic sols outside lyophobic sols. Lyophilic colloidal sols are called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulaion on the addition of sodium chloride solution. Protective powers of different colloidal sols are measured in terms of 'gold number' (Zigmody). It is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of 10 percent sodium chloride. Thus smaller the gold number of a lyophillic sol, the greater is the protective power. 0.025g of starch sol is required to prevent coagulation of 10ml gold sol when ImL of 10% Nacl solution is present. What is gold number of starch sol

AAKASH SERIES-ENVIRONMENTAL ISSUES-Exercise-I (Air pollution)
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  2. Use of CNG instead of diesel reduces air pollution because

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  3. Observe the following device. It is used to control

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  4. According to the Central Pollution Control Board, particles that are r...

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  5. Compressed natural Gas (CNG) is

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  6. Among the following which one causes more indoor chemical pollution

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  7. Catalytic converters are fitted into automobiles to reduce emission o...

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  8. Why is necessary to remove sulphur from petroleum products

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  9. Montreal protocol which calls for appropriate action to protect the oz...

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  10. In 1984, Bhopal gas tragedy took place because methyl isocyanate

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  11. The city in which the entire public road transport runs on CNG

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  12. A major component of Gobar gas is

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  13. The loudness of a sound that a person can withstand without discomfor...

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  14. The major source of noise pollution, worldwide is due to

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  15. the intensity of noise beyond which it causes physical discomfort

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  16. The quietest sound that the ear of a man can detect is known as

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  17. What was added in 1987 as a pollutant to air (Prevention and Control o...

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  18. Sound becomes a hazardous noise pollution if its level is above

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  19. The first effect of noise is

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  20. The material generally used for sound proofing of rooms like a recordi...

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