TOD-II SE-II Re-Test

Consider the following assertion [A] and reason [R] and choose the most appropriate answer

[A] Disperse dyes are crystalline in nature.

[R] melting point of disperse dye is >150°C.

• [A] is right [R] is wrong

• [A] is right [R] is right

• [A] is wrong [R] is wrong

• [A] is wrong [R] is right

Consider the following assertion [A] and reason [R] and choose the most appropriate answer

[A] Disperse dyes have soluble, non-ionic dye and molecularly dispersed.

[R] Disperse dyes dissolution is aided with dispersing agent.

• [A] is right [R] is wrong

• [A] is right [R] is right

• [A] is wrong [R] is wrong

• [A] is wrong [R] is right

Consider the following assertion [A] and reason [R] and choose the most appropriate answer

[A] Due to the absence of ionizable groups, disperse dyes tend to sublime without decomposition.

[R] The color of disperse-dyed fabric may fade while ironing.

• [A] is right [R] is wrong

• [A] is right [R] is right

• [A] is wrong [R] is wrong

• [A] is wrong [R] is right

The nylon is dyed in aqueous medium even at boil without carrier because

• High segmental mobility of polymer chain in aqueous medium.

• Glass transition temperature is lower.

• Polymer chains are held by hydrogen bonds which get disrupted with water.

• All the above.

The property of leveling dyes on nylon is

• Lesser fastness and lower affinity

• Lesser fastness and higher affinity

• Higher fastness and lower affinity

• Higher fastness and higher affinity

In nylon dyeing Acid dye form bonding with

• Carboxyl group

• Amino group

• Hydroxyl group

• All the options

The property of super milling dyes on nylon is

• Lesser fastness and lower affinity

• Lesser fastness and higher affinity

•   Higher fastness and lower affinity

• Higher fastness and higher affinity

Affinity of acid dye towards nylon in sequence

• Levelling dye > milling dye > super-milling dye

• Super-milling dye > milling dye > levelling dye

• Super-milling dye > milling dye = levelling dye

• Levelling dye = milling dye > super-milling dye

During dyeing of nylon with levelling dyes ________ is used in dyebath.

• Acetic acid

• Ammonium acetate

• Sulphuric acid

• Sodium chloride

Molecular weight and solubility of milling acid is

• High and low

• Low and low

• Low and high

• High and high