Description : The process by which a substance absorbs moisture upon exposure to the atmosphere is called: w) efflorescence x) deliquescence y) dehydrogenation z) desalination
Last Answer : ANSWER: X -- DELIQUESCENCE
Description : The loss of water of crystallization from a hydrat when exposed to air is termed: w) efflorescence (pron: eh-floor-es-ence) x) deliquescence (pron: del-i-kwes-ence) y) quiescence (pron: kwi-es-ence) z) anhydrogenation
Last Answer : ANSWER: W -- EFFLORESCENCE
Description : Read the statement given below (i ) Seeds require moisture for germination . (ii) Plant can absorb nutrients in dissolved form. (iii) Irrigation protects crop from both frost and hot air currents . (iv) Irrigation improves soil texture . a) i and ii b) i ,ii, iii c) i , ii , iii , iv . d) i and iii
Last Answer : a) i and ii
Description : Which one of the following is not a matter a global concern in the removal of tropical forests ? (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer ... , moisture content and reflectivity. (D) Their contribution to the biological diversity of the planet.
Last Answer : (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer.
Description : To remove all the moisture from a wet solid it requires exposure to __________ air. (A) Perfectly dry (B) Highly humid (C) High temperature (D) None of these
Last Answer : (A) Perfectly dry
Description : The bubbling off of carbon dioxide when a bottle of carbonated beverage is opened is a good example of: w) deliquescence x) effervescence y) condensation z) sublimation
Last Answer : ANSWER: EFFERVESCENCE
Description : Less dew is formed on cloudy nights because (a) Clouds absorb the falling dew (b) Clouds scatter moisture (c) In cloudy nights the radiation takes place very slowly (d) In cloudy nights the radiation takes place very quickly
Last Answer : Ans:(d)
Description : $ Velamen tissue can directly absorb moisture from the atmosphere ! Velamen tissue is present in desert plants.
Last Answer : $ Velamen tissue can directly absorb moisture from the atmosphere ! Velamen tissue is present in desert plants. ... D. If both As and R are wrong.
Description : Ethers are kept in brown bottles because (a) Brown bottles are cheaper than colorless clear bottles (b) Ethers absorb moisture (c) Ethers evaporate readily (d) Ethers are oxidized to explosive peroxides
Last Answer : Ethers are oxidized to explosive peroxides
Description : Capacity of soil to absorb moisture, is generally known as (A) Permeability (B) Porosity (C) Infiltration capacity (D) Perviousness
Last Answer : (C) Infiltration capacity
Description : A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called A.activation B.attenuation C.corepression D.desiccation
Last Answer : B.attenuation
Description : Plants are killed in winter by frost because (a) No photosynthesis occurs at low temperature (b) Of desiccation (c) Water in the plants freezes (d) Water in the plants evaporates
Last Answer : Ans:(b)
Description : Osmosis is the diffusion of what substance through a cell membrane? -Biology
Last Answer : answer:
Description : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus?
Last Answer : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus? A. Yolk one B. Amnion C. Chorion D. Allantois.
Last Answer : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus? A. Yolk sac B. Amnion C. Chorion D. Allantois
Description : Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus? (a) Yolk sac (b) Amnion (c) Chorion (d) Allantosis
Last Answer : (b) Amnion
Description : Why is a capsule advantageous to a bacterium? (a) It protects the bacterium from desiccation. (b) It provides means of locomotion. (c) It allows bacterium to “hide” from host’s immune system. (d) It allows the bacterium to attach to the surface.
Last Answer : c) It allows bacterium to “hide” from host’s immune system
Description : Efflorescence in cement is caused due to an excess of (A) Alumina (B) Iron oxide (C) Silica (D) Alkalis
Last Answer : Answer: Option D
Description : Sea sand used in structures causes (A) Dampness (B) Efflorescence (C) Disintegration (D) All of these
Description : When a brick is immersed in water for 24 hours and then dried, if (A) No grey or white deposits appear on the surface, the brick is free from soluble salts (B) 10 percent surface is ... percent surface is covered with grey or white deposits, the brick has serious efflorescence (D) All the above
Description : Pick up the correct statements from the following: (A) Cracks appear on the plastered surface in the form of hair cracks (B) In brick work, the efflorescence is removed by applying a solution ... Excessive thermal variations in the backing or plaster causes the plaster to fall (D) All the above
Description : Dampness causes (A) Efflorescence (B) Bleaching of paints (C) Crumbling of plaster (D) Growth of termites
Description : Efflorescence is cement is caused due to the excess of (a) Lime (b) Silica (c) Alkalies (d) Iron oxide
Last Answer : (c) Alkalies
Description : Efflorescence in cement is caused due to an excess of [ A ] Alkalies [ B ] Silica [ C ] Iron oxide [ D ] Alumina
Last Answer : [ A ] Alkalies
Description : Hydraulic lime is not used in plastering because it may result in a) Blistering* b) Efflorescence c) Flaking d) Fluorescence
Last Answer : a) Blistering*
Description : Define desiccation with two example of Desiccants and draw a diagram of “ Desiccator”
Last Answer : Definition: Desiccation is the process of complete removal of mechanically admixed water from substances. Examples of desiccants: Silica, activated charcoal, calcium sulfate, calcium chloride, and molecular sieves. Diagram:
Description : What does the term ‘Desiccation’’ mean?
Last Answer : Definition: Desiccation is the process of complete removal of mechanically admixed water from substances. Examples of desiccants: i. Dried Silica gel, ii. Phosphorous pentoxide iii. calcium sulfate, iv. Anhydrous calcium chloride, v. Conc. Sulphuric acid vi. Phosphorous trioxide
Description : In biological studies, which of the following terms could be used to replace the word dehydration? a) encystation b) desiccation c) hydrolysis d) none of these
Last Answer : ANSWER: B -- DESICCATION
Description : Because they are resistant to desiccation (pron: des-ih-KA-shun), desert plants are known as what? a) dehydrates b) hydrophobocytes c) xerophytes d) none of the above
Last Answer : ANSWER: C -- XEROPHYTES
Description : Soldering of two metals is possible because of the property of – (1) Viscosity (2) Osmosis (3) Cohesion (4) Surface tension
Last Answer : (3) Cohesion Explanation: Soldering is the process of joining two metals by the use of a solder alloy, and it is one of the oldest known joining techniques. It is possible because of the ... through-out the interior of substance. Soldering leads to alloy formation at the layer between two metals.
Description : Soldering of two metals is possible because of the property of : (1) Viscosity (2) Osmosis (3) Cohesion (4) Surface tension
Last Answer : Cohesion
Description : Hygroscopic substances are those substance which ready absorb
Last Answer : Water Vapors
Description : Property of salt to absorb atmospheric salt?
Last Answer : Hygroscopic
Description : Resilience is defined as the property of material to absorb energy when deformed _________ and to release this energy when unloaded. a) Elastically b) Plastically c) Up to fracture point d) None of the listed
Last Answer : a) Elastically
Description : In allergic reaction: a. Arthus reaction is a type IV reaction b. anaphylaxis occurs in patients who have had no previous exposure to the offending substance c. contact dermatitis is a type IV reaction d. positive Mantoux test is a type III reaction
Last Answer : contact dermatitis is a type IV reaction
Description : Attrition is,v A. Process of normal wear of teeth B. Lost of teeth substance as a result of chemical exposure
Last Answer : A. Process of normal wear of teeth
Description : Moisture in a substance exerting an equilibrium vapour pressure less than that of pure liquid at the same temperature is called the __________ moisture. (A) Bound (B) Unbound (C) Critical (D) None of these
Last Answer : (A) Bound
Description : Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture. (A) Unbound (B) Free (C) Critical (D) Bound
Last Answer : (B) Free
Description : Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the __________ moisture. (A) Free (B) Unbound (C) Equilibrium (D) Bound
Last Answer : (C) Equilibrium
Description : The property of a soil which permits water to percolate through it, is called (A) Moisture content (B) Permeability (C) Capillarity (D) None of these
Last Answer : (B) Permeability
Description : Pick out the wrong statement. (A) Critical moisture content is not a property of the material itself (B) A sharp increase in pressure drop gives an indication of the flooding in a ... unity (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum
Last Answer : (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum
Description : Pick up the correct statement from the following: (A) A highly absorptive aggregate reduces the workability of concrete considerably (B) The specific gravity of aggregate is important for the determination ... and porosity of an aggregate influence the property of the concrete (D) All the above
Description : Black cotton soil is unsuitable for foundations because its (A) Bearing capacity is low (B) Permeability is uncertain (C) Particles are cohesive (D) Property to undergo a volumetric change due to variation of moisture content
Description : The property of a soil due to which water percolates through it is known as a) Porosity b) Permeability* c) Moisture content d) Capillarit
Last Answer : b) Permeability*
Last Answer : Hygroscopicity is the property of absorbing moisture from atmosphere.
Description : What Color does chlorophyll not absorb? A. Red B. Blue C. Green (Answer) D. Yellow
Last Answer : C. Green (Answer)
Description : One of the main function of the earth’s ozone layer is to ? A. Prevent global warming B. Filter out ultraviolet rays (Answer) C. Absorb pollution D. All of the above
Last Answer : B. Filter out ultraviolet rays (Answer)
Description : A man builds a house rectangular in shape. All sides have southern exposure. A bear walks by the house. What color is the bear? Why? (This one could drive you nuts and should only be attempted by those ... ..brown...the house is on a steep slope There is no answer and this is a stupid question.
Last Answer : ..white...
Description : Which of the following are the demerits of globalization of higher education? (a) Exposure to global curriculum (b) Promotion of elitism in education (c) Commodification of higher education (d) Increase in the cost of education Select the ... (C) (b), (c) and (d) (D) (a), (b), (c) and (d)
Last Answer : (C) (b), (c) and (d)