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Chemicals Found in DYES

Authored by Charilyn Paneda

Science

9th - 12th Grade

Used 16+ times

Chemicals Found in DYES
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10 questions

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1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

1.    Which of the following is NOT a property of dyes?

A.    Dyes absorb light in the visible spectrum.

B.   They build up on the surface of the material.

C.   They have both chromophore and conjugated systems.

D. dye molecules are smaller than the size of the pores of the fibers.

 

2.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

2.    What is the color-bearing group in the chemical structure of a dye?

A. Auxochrome

B. Chromophore

C. Conjugated system

D. Visible spectrum

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

3.     Which of the statements is incorrect?

A.    Adding more chromophores causes the bathochromic effect.

B.    Reducing the number of auxochrome can cause a hypsochromic effect.

C.    Decreasing the number of a conjugated system can intensify the color of the dye.

D.     Increasing the number of chromophore conjugated to auxochrome can intensify the color of the dye.

4.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

4.    What type of dye carries a negative charge?

A. Acid Dye 

B. Basic Dye   

C.    Direct Dye

D. Vat Dye

5.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

5.    What is the perfect dye to use in hydrophobic substrate or fabric like polyesters and acetate?

A. Direct Dye

B. Disperse Dye

C. Reactive Dye

D. Sulfur Dye

6.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

6.    What is the perfect dye to use in denim fabric?

A. Acid Dye 

B. Azoic Dye  

C. Sulfur Dye

 D. Vat Dye

7.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

7.    What can you add during direct dyeing to produce cool colors on fabric?

A. Copper sulfate  

B. Sodium bicarbonate

C. Sodium chloride

D. Sulfur

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