Description : Heavy metals, such as____work by _____‗‗ a. Mercury; Disrupting Membranes b. Copper; Producing Toxins c. Iodine; Denaturing Proteins d. Silver; Binding Protein Molecules Together
Last Answer : d. Silver; Binding Protein Molecules Together
Description : Pick out the wrong statement. (A) At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature (B) Normally, the gases which are easily liquefied are more soluble ... (D) At constant pressure, solubility of a gas in a liquid increases with rise in temperature
Last Answer : (A) At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature
Description : Black lung disease occurs in people working in – (1) Electroplating industry (2) Organic solvents industry (3) Paint manufacturing industry (4) Coal mines
Last Answer : (4) Coal mines Explanation: Coal worker's pneumoconiosis, colloquially referred to as black lung disease, is a lung disease that results from breathing in dust from coal, graphite, or man-made carbon ... to be removed by the body; that leads to inflammation, fibrosis, and in worse cases, necrosis.
Description : Which of the following improperly describes the physical properties of an alkyne? (a) relatively nonpolar (b) nearly insoluble in water (c) less dense than water (d) insoluble in most organic solvents
Last Answer : insoluble in most organic solvents
Description : A nonpolar molecule is usually: w) hydrophilic x) soluble in water y) hydrophytic z) soluble in organic solvents
Last Answer : ANSWER: Z -- SOLUBLE IN ORGANIC SOLVENTS
Description : Black lung disease occurs in people working in (1) Electroplating industry (2) Organic solvents industry (3) Paint manufacturing industry (4) Coal mines
Last Answer : Coal mines
Description : Can you help me engineer this leak detection system for organic solvents?
Last Answer : answer:I'm sorry that I may not be qualified to answer this question, but these are my ideas. If argon is what will be leaking, you could have some sort of argon detector, and some sort of ... when there are no leaks. Any drop in pressure would signal a leak. Look up pressure decay leak detection.
Description : Assertion(A): Ethyl alcohol is soluble in organic solvents Reason (R): Ethyl alcohol is having non polar ethyl group
Last Answer : Assertion(A): Ethyl alcohol is soluble in organic solvents Reason (R): Ethyl alcohol is having non polar ... is false D. A is false but R is true
Description : Assertion (A): Ethyl alcohol is soluble in organic solvents Reason(R): Calcium chloride can form an addition compound with ethyl alcohol
Last Answer : Assertion (A): Ethyl alcohol is soluble in organic solvents Reason(R): Calcium chloride can form an addition ... is false D. A is false but R is true
Description : Thermosetting resins/polymers as compared to thermoplastic ones are (A) Soluble in all organic solvents (B) More brittle (C) Formed by addition polymerisation only (D) Easily reshaped & reused
Last Answer : (B) More brittle
Description : Vulcanisation of rubber decreases its (A) Tensile strength (B) Resistance to organic solvents (C) Tackiness (D) Working temperature range
Last Answer : (C) Tackiness
Description : What are the three classes of organic solvents?
Last Answer : Typically, organic solvents can be split up in the following classes: Oxygenated, Hydrocarbon, and Halogenated. Oxygenated solvents include alcohols, glycol ethers, ketones, esters, ... solvents include aliphatics and aromatics. Halogenated solvents include those that are chlorinated primarily.
Description : Precipitation or coagulation of proteins may be caused by (a) Heat (b) Changes in pH (c) Heavy metal salts (d) All of these
Last Answer : All of these
Description : An extreme natural phenomenon capable of causing disaster leading to loss of lives or damage to property is known as- (a) Natural hazard (b) Hazard calculation (c) Desertification (d) None of the above
Last Answer : (a) Natural hazard
Description : What factor can affect the rate of photosynthesis by denaturing enzymes in the plant?
Last Answer : ??
Description : Why would denaturing a protein affect its ability to function properly?
Last Answer : Need answer
Description : Alcohols are a. Surfacants. b. Heavy Metals. c. Denaturing Agents. d. Detergents
Last Answer : d. Detergents.
Description : Pick out the wrong statement. (A) 'Solvates' are chemical compounds formed by solute with their solvents. When water is the solvent, then it is called a 'hydrate' (B) In heat exchanger ... vertical evaporators, area of central downtake is about 50 to 100% of the total tube cross-sectional area
Last Answer : (C) Heat transfer co-efficient during nucleate boiling is not influenced by the agitation imparted
Description : Which of the following factors does not govern the mechanism of petroleum formation from organic sources? (A) pH of the soil (B) Bacterial action (C) Heat (D) Pressure
Last Answer : (A) pH of the soil
Description : why should the stomach need such an extreme PH level while the small intestine do not? -Biology
Last Answer : answer:
Description : Proteins formed when cells are exposed to viral or foreign agents that are capable of activating other components of the immune system are referred to as a) interferons. Interferons are biologic ... series of enzymatic proteins in the serum that, when activated, destroy bacteria and other cells.
Last Answer : a) interferons. Interferons are biologic response modifiers with nonspecific viricidal proteins.
Description : 83. Which one of the following is wrong statement ? (1) Nitrosomonas and Nitrobacter are chemoautotrophs (2) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also (3 ... living conditions (4) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
Last Answer : Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
Description : Which of the following are correct statements concerning unsaturated hydrocarbons? (a) All unsaturated hydrocarbons are insoluble in water. (b) All unsaturated hydrocarbons are soluble in nonpolar solvents. (c) All unsaturated hydrocarbons are more dense than water. (d) (a) & (c)
Last Answer : (a) & (c)
Description : Consider (R)- and (S)-2-butanol. Which physical property distinguishes the two compounds? (a) melting point (b) solubility in common solvents (c) Rotation of plane-polarized light (d) Infrared spectrum
Last Answer : Rotation of plane-polarized light
Description : Nitrogen fixation is a process of - (1) Assimilation of nitrate (2) Utilisation of nitrogen gas (3) Conversion of organic nitrogen to proteins (4) Conversion of molecular nitrogen to ammonia
Last Answer : (4) Conversion of molecular nitrogen to ammonia Explanation: Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia (NH3) or other molecules available ... plants as nutrients. The conversion of organic nitrogen to proteins is achieved in Nitrogen cycle.
Description : Nitrogen fixation is a process of (1) Assimilation of nitrate (2) Utilisation of nitrogen gas (3) Conversion of organic nitrogen to proteins (4) Conversion of molecular nitrogen to ammonia
Last Answer : Conversion of molecular nitrogen to ammonia
Description : How do I keep my grandson from dying from huffing solvents?
Last Answer : Oh sweetie all I can say is I’m so sorry you are going through this sorrow. We ached for our children and then we ache for our grandchildren. Do you think he would go to any twelve-step program?
Description : Which of the following are aprotic solvents?
Last Answer : Which of the following are aprotic solvents? A. `DMSO` B. `DMF` C. `H_(2)O` D. `CH_(3)COOH`
Description : Statement-1: In protic solvents phenoxide ion is alkylated primarily at C-alkylation whereas in polar aprotic solvents O-alkylation with alkyl halide.
Last Answer : Statement-1: In protic solvents phenoxide ion is alkylated primarily at C-alkylation whereas in polar ... Statement-1 is false, Statement-2 is true
Description : What solutes dissolved in solvents create?
Last Answer : solutions
Description : What types of substances will dissolve in polar solvents?
Last Answer : As a rule polar solutes are dissolved in polar solvents.
Description : Lecithins are soluble in ordinary solvents except (A) Benzene (B) Ethyl alcohol (C) Methyl alcohol (D) Acetone
Last Answer : Answer : D
Description : The catalytic power of enzymes is due to (a) the presence of amino acids in their structures (b) their high molecular weight (c) their ability to lower the activation energy of the reaction (d) their limited solubility in water and other solvents
Last Answer : Ans:(c)
Description : Most covalent compounds (a) Behave like electrolytes in the molten state (b) Have high melting and boiling points (c) Are hard substances because of strong covalent bonds (d) Are more soluble in non-polar solvents than in polar solvents
Last Answer : Ans:(d)
Description : Pick out the wrong statement regarding the solubility characteristics of high polymers. (A) Greater the degree of cross-linking in the polymer, lesser is its solubility (B) Polymers having more ... of the solvent (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Last Answer : (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Description : Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is (A) Chloroethane (B) Chloroprene (C) Isoprene (D) None of these
Last Answer : (B) Chloroprene
Description : Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent ... nitration temperature (C) Lower solvent dilution ratio (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Tin vessels are corroded by (A) Anhydrous ammonia (B) Aromatic solvents (C) Synthetic detergent solution (D) None of these
Last Answer : (D) None of these
Description : Raoult's law applies to the (A) All liquid solutions (B) Non-ideal solution only (C) Non-volatile solute (D) Solvents
Last Answer : (D) Solvents
Description : In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas ... (C) Less than 1 kg of C is transferred to B (D) No amount of C is transferred to B
Last Answer : (A) The entire amount of C is transferred to solvent B
Description : Fractional solvent extraction (A) Employs only one solvent (B) Employs two solvents (C) Results in low interfacial tension (D) None of these
Last Answer : (B) Employs two solvents
Description : For gas absorption, low viscosity solvents are preferred, because of their (A) Better flow characteristics (B) Low pumping pressure drop (C) Rapid absorption rates (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching? (A) Isopropyl alcohol (B) Butyl alcohol (C) Toluene (D) Hexane
Last Answer : (B) Butyl alcohol
Description : __________ are added in lacquers to remove film brittleness and to improve adhereness. (A) Film forming materials (B) Plasticisers (C) Diluents (D) Solvents
Last Answer : (B) Plasticisers
Description : A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of ... B) Followed from Margules equation (C) A corollary of Henry's law (D) None of these
Last Answer : (A) The distribution law
Description : Why are solvents used in the soldering process?
Last Answer : To remove contaminants from soldered connections.
Description : What are the solvents used in compressor wash?
Last Answer : In eco wash, pure demineralized water is used.
Description : Other than ai, by which of the following phytotoxicity may occur a).solvents b).impurities’ c).high dose d).all
Last Answer : d).all
Description : The following technique makes use of the difference in net charges of proteins at a given pH: (A) Thin layer chromatography (B) Ion exchange chromatography (C) High performance liquid chromatography (D) Paper chromatography
Last Answer : Answer : B
Description : All the following statements about pepsin are correct except (A) It is smaller than pepsinogen (B) It is formed by the action of HCl on its precursor (C) Its optimum pH is 1.0–2.0 (D) It hydrolyses the C-terminal and N-terminal peptide bonds of proteins