Directions: Choose the letter corresponding to the correct answer. Write your answer on a separate sheet of paper. 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. What is the color-bearing group in the chemical structure of a dye? a Auxuchrorue c. Conjugated system b. Chromophore d. Visible spectrum 3. Which of the statements is incorrect? a. Adding more chromophores causes the bathochromic effect. b. Reducing the number of auxochrome can cause a hypsochrome effect c. Decreasing the number of a conjugated systems can intensify the color of the dye. d increasing the number of chromophore conjugated to autochrome can intensify the color of the dye. 4. What type of dye carries a negative charge a. Acid Dye c. Direct Dye b. Basic Dye d. Vat Dye 5. What is the perfect dye to use in hydrophobic substrate or fabric ble polyesters and acetate? 2. Direct Dye c. Reactive Dye b. Disperse Dye d. Sulfur Dye 6. What is the perfect dye to use in denim fabric? a. Azoic Dye c. Sulfur Dye B. Acid Dye d. Vat Dye 7. What can you add during direct dyeing to produce cool colors on fabrie? a. Copper sulfate c. Sodium chloride b. Sodium bicarbonate d. Sulfur 8. What insect can transmut diseases like dengue and Japanese encephalitis? b. Mites c. Mosquitoes d. Ticks 9. How does dye wastewater seriously affect the food chain in a river or lake? a. It can directly kill aquatic animals once ingested b. It can reflect sunlight causing the decrease of photosynthetic activity of algae C. It can absorb the sunlight that increases the population of plankton d. It can change the color of the water, causing a drastic increase in the fish population. 10. Which of the following chemicals is considered a gold-standard repellant? a Citridiol C. Picaridin b. DEET d. Merek 3535 11 What chemical is designated by WHO as a repellant choice for malaria prevention? a. Citridiol c. Picaridin hDEET d Merck 3535 12 Which of the following is a natural repellant extracted from lemon eucalyptus oil? a Citrdiol c. Picaridin b. Citronellol d. Pyrethrum 13. What is the common name of the insect repellant with the chemical name of 2-ethyl-1,3-hexadiol? a DMP c. M-250 b. Indalone d. Rutgers 612 14. What chernical is present in human sweat and breath that attracts insects? 1-octen-ol c. Dimethyl phthalate b. 3,7-Dimethyloct-6-en-1-ol d. Para-menthane-3,8-diol 15. How can you make sure insect repellants become effective upon application? a. Apply as much as possible on skin or areas affected. b. Buy insect repellant with strong odors to ensure all insects will be repelled c. Close the doors and windows to make sure that insects will be affected once repellants are applied. d. Read the products' labels to know its concentration, target insects, effectiveness, and proper usage. PA ANSWER PO NONSENSE/WRONG ANSWERS AUTO REPORT

Question

Directions: Choose the letter corresponding to the correct answer. Write your answer on a separate sheet of paper. 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. What is the color-bearing group in the chemical structure of a dye? a Auxuchrorue c. Conjugated system b. Chromophore d. Visible spectrum 3. Which of the statements is incorrect? a. Adding more chromophores causes the bathochromic effect. b. Reducing the number of auxochrome can cause a hypsochrome effect c. Decreasing the number of a conjugated systems can intensify the color of the dye. d increasing the number of chromophore conjugated to autochrome can intensify the color of the dye. 4. What type of dye carries a negative charge a. Acid Dye c. Direct Dye b. Basic Dye d. Vat Dye 5. What is the perfect dye to use in hydrophobic substrate or fabric ble polyesters and acetate? 2. Direct Dye c. Reactive Dye b. Disperse Dye d. Sulfur Dye 6. What is the perfect dye to use in denim fabric? a. Azoic Dye c. Sulfur Dye B. Acid Dye d. Vat Dye 7. What can you add during direct dyeing to produce cool colors on fabrie? a. Copper sulfate c. Sodium chloride b. Sodium bicarbonate d. Sulfur 8. What insect can transmut diseases like dengue and Japanese encephalitis? b. Mites c. Mosquitoes d. Ticks 9. How does dye wastewater seriously affect the food chain in a river or lake? a. It can directly kill aquatic animals once ingested b. It can reflect sunlight causing the decrease of photosynthetic activity of algae C. It can absorb the sunlight that increases the population of plankton d. It can change the color of the water, causing a drastic increase in the fish population. 10. Which of the following chemicals is considered a gold-standard repellant? a Citridiol C. Picaridin b. DEET d. Merek 3535 11 What chemical is designated by WHO as a repellant choice for malaria prevention? a. Citridiol c. Picaridin hDEET d Merck 3535 12 Which of the following is a natural repellant extracted from lemon eucalyptus oil? a Citrdiol c. Picaridin b. Citronellol d. Pyrethrum 13. What is the common name of the insect repellant with the chemical name of 2-ethyl-1,3-hexadiol? a DMP c. M-250 b. Indalone d. Rutgers 612 14. What chernical is present in human sweat and breath that attracts insects? 1-octen-ol c. Dimethyl phthalate b. 3,7-Dimethyloct-6-en-1-ol d. Para-menthane-3,8-diol 15. How can you make sure insect repellants become effective upon application? a. Apply as much as possible on skin or areas affected. b. Buy insect repellant with strong odors to ensure all insects will be repelled c. Close the doors and windows to make sure that insects will be affected once repellants are applied. d. Read the products' labels to know its concentration, target insects, effectiveness, and proper usage.  PA ANSWER PO NONSENSE/WRONG ANSWERS AUTO REPORT​

Asakab · Answer

Answer: a c c a b d a c b c a a d b d Hope it help

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