Pine_and_fir_are_difficult_to_brighten._Colour_reduction_occurs_by_altering____________groups,_the_pulp_is_sometimes_subsequently_treated_with_SO2_to_neutralize_OH‚Äö√Ñ√∂‚àö√ë‚àö¬®_and_reduce_any_residual_peroxide.$#

Pine_and_fir_are_difficult_to_brighten._Colour_reduction_occurs_by_alt

1.	Pine_and_fir_are_difficult_to_brighten._Colour_reduction_occurs_by_altering____________groups,_the_pulp_is_sometimes_subsequently_treated_with_SO₂_to_neutralize_OH^{‚Äö√Ñ√∂‚àö√ë‚àö¬®}_and_reduce_any_residual_peroxide.$#
A.	Chromosome
B.	Chromophoric
C.	Dithionite
D.	Peroxide
Answer» C. Dithionite

Discussion

No Comment Found

Related MCQs

Pine and fir are difficult to brighten. Colour reduction occurs by altering __________ groups, the pulp is sometimes subsequently treated with SO2 to neutralize OH– and reduce any residual peroxide.
__________ with sodium hydroxide and/or sodium peroxide is utilized to produce the high pH that is crucial to produce the active perhydroxyl ion, HOO–.
__________ (5% on wood) is used usually after the addition of magnesium ion. The mechanism for inactivating the ions by __________ precipitating the ions, but, strictly speaking, it is not a chelating agent.
Chelating agents, such as __________ have the added gain of preventing pulp dis-coloration by binding together with ferric ion that could otherwise form a colored complex with the phenolic lignin structure.
In hydrosufite bleching Zn+2SO2andrarr; __________
___________WITH_SODIUM_HYDROXIDE_AND/OR_SODIUM_PEROXIDE_IS_UTILIZED_TO_PRODUCE_THE_HIGH_PH_THAT_IS_CRUCIAL_TO_PRODUCE_THE_ACTIVE_PERHYDROXYL_ION,_HOO‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬®.?$#
Pine_and_fir_are_difficult_to_brighten._Colour_reduction_occurs_by_altering____________groups,_the_pulp_is_sometimes_subsequently_treated_with_SO2_to_neutralize_OH‚Äö√Ñ√∂‚àö√ë‚àö¬®_and_reduce_any_residual_peroxide.$#
__________ (5% on wood) is used usually after the addition of magnesium ion. The mechanism for inactivating the ions by __________ precipitating the ions, but, strictly speaking, it is not a chelating agent?
Chelating agents, such as __________ have the added gain of preventing pulp dis-coloration by binding together with ferric ion that could otherwise form a colored complex with the phenolic lignin structure.
In hydrosufite bleching Zn+2SO2andrarr; __________

Pine_and_fir_are_difficult_to_brighten._Colour_reduction_occurs_by_altering____________groups,_the_pulp_is_sometimes_subsequently_treated_with_SO2_to_neutralize_OH‚Äö√Ñ√∂‚àö√ë‚àö¬®_and_reduce_any_residual_peroxide.$#

Discussion

No Comment Found

Related MCQs

Reply to Comment

Pine_and_fir_are_difficult_to_brighten._Colour_reduction_occurs_by_altering____________groups,_the_pulp_is_sometimes_subsequently_treated_with_SO₂_to_neutralize_OH^{‚Äö√Ñ√∂‚àö√ë‚àö¬®}_and_reduce_any_residual_peroxide.$#