Which of the following statements is incorrect? *     A. Storing food inside a chemical cabinet is not allowed. B. A chemical can still be stored in a container with leaks as long as it has a proper label and cover. C. A chemical that is stored in a cabinet should be properly labeled and covered. D. A personal protective equipment should always be used in handling chemicals.       Odd one out *   A. Ingestion B. Injection C. Physical hazard D. Inhalation

Q: Fick’s Law of Diffusion states the rate of diffusion is directly proportional to a. the area…

A: Fick's Law describes the factors that impact diffusion of gas across membranes.   R=DA*∆pd   Where,…

Q: Which occurs when propane undergoes a chemical reaction with oxygen? A. chemical bonds are broken.…

A:

Q: 33. The compound above would NOT be soluble in a. water b. hexane C. nonpolar solvents d. more than…

A: This is a part of solution chemistry which is explained below.

Q: 2 It is a type of solution with low concentrations ? Select one: a. concentrated b. unsaturated…

A: Type of solutions: a) Concentrated solution : the  solution having higher concentration of solutes…

Q: Why is scurvy caused what are its symptoms

A: Scurvy happens when there is a lack of vitamin C, or ascorbic acid.

Q: What are physical hazards of chemicals. Explain each of them shortly.

A: Based on the intrinsic property of the chemical the physical hazards are broadly classified into…

Q: 4. Which pair of solvents is NOT miscible? a. hexane and water b. water and methanol c. methanol and…

A: Polar molecules tend to dissolve in polar substance.  Non-polar molecules tend to dissolve in…

Q: When working with chemicals in the laboratory, which is something you should NOT do?A. Read the…

A: Chemicals have hazardous effects. They may cause skin burning, irritation in skin and the vapor of…

Q: Which one of the following is not an organic pollutant: 1. a. Chloroform b. Benzene c. Cobalt…

A: On the basis of types of compounds these are divided into two pats as ; Organic compounds :-  The…

Q: What senses should be used when making observations?   a. Sight   b. Smell   c.…

A: The objective of the question is to identify which senses should be used when making observations in…

Q: Which statement is false regarding labels on chemical containers? a. labels tell the embalmer how…

A: Label is an indicative of hazardous behaviour and precurtions need to be employed during use.

Q: 1. One common chemical contaminant that is removed from water during water treatment. How is it…

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Q: 10. Chemical substance commonly used as a flavor enhancer: A. Monosodium glutamate (MSG) C.…

A: Given evolume of food through the presence of carbon dioxide

Q: Thermal pollution is related to O a. a increase in dissolved oxygen in water O b. a decrease in…

A: Thermal pollution is the decrement in the water quality due to any process that changes the…

Q: 4. During diffusion, particles move from an area of high concentration to  A. nowhere they stay in…

A:

Q: A chemical described as having a local effects causes damage that is: a. widespread     b. where…

A: A chemical may be harmful or be useful for a particular action in the body. There are many different…

Q: 4. Compare boiling points and solubilities in water for each pair c Ammonia, NH, and methane, CH, b.…

A: Physical properties of a compound depends on its intermolecular forces. The compounds which have the…

Q: 5. Calcium carbonate (marble) boiling stones must not be used in the experiment because they will…

A: Boiling stones or boiling chips are insoluble, porous and small stones of either silicon carbide or…

Q: The balance of water in the body takes into account the intake of food, liquids and: a. the hydrogen…

A: Correct option is c. That is metabolic reactions.  Incorrect option are: a. the hydrogen bridges…

Q: Increasing the number of carbons in a drug molecule (more than five carbon atoms) will: O a.…

A: Given information,     The number of carbon atoms in a drug molecule is increased

Q: You want to separate the oil from water, you will use one of the following (pick the best choice):…

A: In chemistry several separation methods are used based on the system that we intend to separate.…

Q: Which of the following is a physical process of water purification which separates suspended solid…

A: Sedimentation is a physical water treatment process using gravity to remove suspended solids from…

Q: O a. High concentration of Methane (CH4) in the area + impact of two hard metals which can cau spark…

A: We have to choose correct option

Q: What methods are used to detect the release or presence of hazardous chemicals? a)  Odor, visual…

A: Correct option is  (c.) That is Air monitoring, housekeeping, odor    Incorrect options are : a)…

Q: The most common chemical route of entry is: a. ingestion b. inhalation c. skin / eye contact d.…

A: The most common chemical route of entry is: Answer : b. inhalation

Q: By placing a bottle of hydrochloric acid next to another of ammonia and removing the corks from…

A: Note: ammonia donates its lone pair to proton forms ammonium ion. Therefore it is called…

Q: What reaction is involved in the production of soap?* A. Endothermic reaction B. Exothermic…

A: Production of soap involves saponification reaction.

Q: A cotton fiber, when dry, has a tenacity of 5 g/den. After wet conditioning, it absorbs a maximum…

A: Given in the information that a dry cotton fiber has a tenacity of 5 g/den (grams per denier) Wet…

Q: Explain the principle behind the use of cold packs and hot packs. What chemicals are found in each…

A: These hot and cold packs are used by the athlete for reducing the injury to the muscles and joint…

Q: Main cause why pollutants end up at fish meat:  a. burning fossil fuels b. air pollution c. water…

A: Samples of various fishes when tested it was found that they are contaminated with high level of…

Q: Classify the following as existing in one of the (3) physical state of matter, at room temperature…

A:

Q: An erythrocyte placed in pure water will lyse, but bacteria usually won’t. This is because…

A: An erythrocyte placed in pure water will lyse, but bacteria usually won’t.

Q: Which intermolecular force requires a polar molecule? A. dispersion forces  B. covalent bonding…

A: Interpretation: Which kind of intermolecular force requires a polar molecule is to be determined.…

Q: Fish kills regularly take place on hot summer days. Fish kills occur in summer due to __ a.…

A: We have to tell the reason for fish kills to occur on summer days. The given options are  a.…

Q: In which scenario is water the solvent? a. Seven drops of water added to 27.5 g of salt b. 12.8 mL…

A: Given, which scenario, water act as solvent?

Q: 9. Determine the volume of concentrated sulfuric acid (density 1.84 g/cm2) containing 98% HaSO, by…

A:

Q: How many moles of LiBr are present in 375 mL of a 0.175 M LiBr solution?

A: Given :-  molarity of LiBr solution = 0.175 M  volume of solution = 375 mL  To calculate :-  no.of…

Q: If propylene glycol is found to be contaminated with 1.2 ppm of solid foreign substance, what is the…

A: The mass of solute in mg present in a one-liter solution is known as ppm (parts per million)…

Q: 203,450,000g of water in a lake is contaminated with 326g of anthrax. How many ppm? A. 1.60 ppm B.…

A: PPM is Parts Per Million. 1 PPM is defined as the concentration of the solution, containing 1g of…

Q: is soluble in water. Its water solution is neutral. When the solid substance is heated, brown…

A: A is sugar as it given neutral solution and forms brown caramal on heating

Q: How do contaminants transfer within an ecosystem or between ecosystems?

A: A substance that pollutes or contaminates a system is called a contaminant. It can be toxic or…

Q: 9. Desiccants are chemicals that: A. O Remove humidity B. O Add humidity C. O Add moisture D. O…

A: Desiccants are chemicals that ::

Q: A parent witnessed his child who just ingested an old silvery coin. This is an emergency because…

A: Silver is non-toxic and one of the precious metals with the symbol Ag and it is used to make…