Description : Water is a universal solvent for what reactions? A. Chemical B. Biochemical (Answer) C. Physical
Last Answer : B. Biochemical (Answer)
Description : What property of water allows it to be such a versatile solvent that water is often called the universal solvent?
Last Answer : Need answer
Description : Why is universal solvent called that?
Last Answer : Theoretically, it would dissolve everything- even the containerit would be held in!
Description : What is universal solvent?
Last Answer : A universal solvent doesn't exist; water is a good solvent formany materials.
Description : Water is a universal solvent for what reactions? A. Physical B. Nuclear C. Chemical D. Biochemical
Last Answer : ANSWER: D
Description : Why water is called as “Universal Solvent”?
Last Answer : Ans: Because it can dissolve a lot of things in it, due to presence of strong cohesive forces in it and it’s ability to form H-bonding and hydration with solutes.
Description : ____ serves as a universal solvent. a. Water c. Bleach b. Soap d. Odor
Last Answer : a. Water
Description : Water is always involved with landslides. This is because it: (A) reduces the shear strength of rocks (B) increases the weight of the overburden (C) enhances chemical weathering (D) is a universal solvent
Last Answer : Answer: B A landslide is a geological phenomenon that includes a wide range of ground movements. Rockfalls, deep failure of slopes and shallow debris flows were common. Landslides can occur in ... , which destabilize the already fragile slopes. 7) vibrations from machinery or traffic. 8) blasting
Description : Through which molecules of both solvent and liquid type can move easily ?
Last Answer : Molecules of both solvent and liquid type can move easily through cell wall.
Description : What is a solution A. a solid dissolved in a gas B. a solute and a solvent C. a liquid dissolved in a gas D. an amalgam of solids, liquids, and gases?
Last Answer : B. A solute and a solvent
Description : Which of the listed precautions should be observed before spraying liquid solvent on the insulation of an electric motor? A. Slow the motor down to low speed. B. Disconnect the motor from the power source. C. Secure all ventilation in the area. D. Preheat the insulation to assist in cleaning.
Last Answer : Answer: B
Description : Which of the following is used as a solvent in deasphalting of petroleum products? (A) Furfural (B) Propane (C) Methyl ethyl ketone (D) Liquid sulphur dioxide
Last Answer : (B) Propane
Description : Solvent used in Edeleanu process is (A) Furfural (B) Propane (C) Liquid SO2 (D) Phenol
Last Answer : (C) Liquid SO2
Description : Solvent used in duo-sol extraction for lube oil upgradation is a mixture of (A) Propane & phenol-cresol mixture (B) Methyl ethyl ketone & glycol (C) Phenol & furfural (D) Propane & liquid sulphur dioxide
Last Answer : (A) Propane & phenol-cresol mixture
Description : If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is (A) L/G (B) G/L (C) Always < 1 (D) None of these
Last Answer : (A) L/G
Description : The rate of solid-liquid extraction is limited by the (A) Phase change of the solute as it dissolves in the solvent (B) Diffusion of the solute through the solvent in the pores to the outside of the particle (C) ... contact with the particle to the main bulk of the solution (D) All 'a', 'b' & 'c'
Last Answer : (D) All 'a', 'b' & 'c'
Description : Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when (A) Extracting solvent is cheaply & abundantly available ... very high (D) One of the liquid components has very high affinity towards the solvent
Last Answer : (D) One of the liquid components has very high affinity towards the solvent
Description : Pick out the correct statement. (A) In case of liquid-liquid extraction, no separation is possible, if the selectivity of the solvent used is unity (B) With increase in temperature, the selectivity of the solvent used ... in solvent extraction is unity at the plait point (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their (A) Viscosity (B) Density (C) Solubility (D) Relative volatility
Last Answer : (C) Solubility
Description : The solvent used in liquid-liquid extraction should have __________ less than one. (A) Selectivity (B) Distribution co-efficient (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (D) Neither (A) nor (B)
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 : The solvent used in liquid extraction should not have high latent heat of vaporisation, because (A) The pressure drop and hence the pumping cost will be very high (B) It cannot ... by distillation may be prohibitively high (D) It will decompose while recovering by distillation
Last Answer : (C) Its recovery cost by distillation may be prohibitively high
Description : Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m2 and the ... extraction achieved in the unit is (A) 25% (B) 50% (C) 70% (D) 90%
Last Answer : (B) 50%
Description : In liquid extraction, if the selectivity is unity, then (A) Separation of the constituents is the most effective (B) No separation will occur (C) Amount of solvent required will be minimum (D) Solvent flow rate should be very low
Last Answer : (B) No separation will occur
Description : The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of ... A) Liquid side (B) Gas side (C) Interfacial (D) Both liquid and gas side
Last Answer : (B) Gas side
Description : what is the name given to a semisolid suspension of a material of high molecular mass in a liquid solvent?
Last Answer : ANSWER: GEL
Description : The ratio of the distance moved by a compound to the distance moved by the solvent frent is known as its (A) PI value (B) Linking number (C) Rf value (D) Gold number
Last Answer : Answer : C
Description : (1) a homogeneous mixture of two or more substances Explanation: A homogeneous mixture of two or more substances uniformly dispersed throughout a single phase is called solution. In such a mixture, a ... the solvent including its phase, and the solvent is commonly the major fraction of the mixture.
Last Answer : Choose the incorrect statement pertaining to organic compounds - (1) They have low melting and boiling points (2) They do not dissolve in water (3) They are not easily combustible (4) They contain mainly carbon and hydrogen
Description : A volatile substance added to a paint to make its application easy and smooth, is known as (A) Base (B) Solvent (C) Vehicle (D) None to these
Last Answer : Answer: Option B
Description : Which blood group is known as ‘universal donor'?
Last Answer : The 'O' group
Description : Which type of blood of individuals are known as universal donor A. Type A B. Type B C. Type AB D. Type 0
Description : The document adopted by the UN also known as International Bill of Rights for Women' in 1979 is (a) CSW (Commission on the Status of Women) (b) UDHR (Universal Declaration of Human ... Forms of Racial Discrimination) (d) CEDAW (Convention on Elimination of All Forms of Discrimination against Women)
Last Answer : (d) CEDAW (Convention on Elimination of All Forms of Discrimination against Women)
Description : . A procedure included in the caller’s address space by the linker is known as ______. A. local procedure B. Universal procedure C. addressing linker D. both a and b
Last Answer : A. local procedure
Description : A device that violates either the first law of thermodynamics or the second law of thermodynamics is known as _____. A. Ambiguous machine B. Universal machine C. Perpetual-motion machine D. Unique machine
Last Answer : Perpetual-motion machine
Description : In the equation Pv = RT, the constant of proportionality R is known as ______. A. Universal gas constant B. Gas constant C. Ideal gas factor D. Gas index
Last Answer : Gas constant
Description : Which of following are known as universal gates (A) NAND & NOR. (B) AND & OR. (C) XOR & OR. (D) None.
Last Answer : Ans: A NAND & NOR are known as universal gates, because any digital circuit can be realized completely by using either of these two gates.
Description : Members within a group that share similar experiences and feelings are known to have…………. (a) Process ; (b) Universal ; (c) Content ; (d) Conflict
Last Answer : (b) Universal ;
Description : A person with which blood type was historically known as "the universal donor"?
Last Answer : ANSWER: TYPE O