Why camphor disappears when kept on a plate? (a) It sublimes (b) It reacts with the metal of the container (c) It reacts with the gases of the air (d) None of the above

1 Answer

Answer :

Ans:(a)  

Related questions

Description : The element that sublimes (solid into vapour) on heating?

Last Answer : Iodine

Description : Iodine is a solid and sublimes at ordinary temperature.This is because of :

Last Answer : Iodine is a solid and sublimes at ordinary temperature.This is because of : A. weak I-I bonds ... weak van der Waals forces between `I_2` molecules.

Description : Ice skating is possible and practical because of a unique property of water. Is it because: w) The coefficient of kinetic friction of steel on frozen water decreases with decreasing temperature x ... sublimes y) The melting point decreases with increasing pressure z) Ice is a good thermal insulator 

Last Answer : ANSWER: Y -- THE MELTING POINT DECREASES WITH INCREASING PRESSURE 

Description : The pressure exerted by a stationary liquid kept in a container at any point inside the liquid is known as ________ pressure. a)atmospheric b)hydrostatic c) air d)none

Last Answer : b)hydrostatic

Description : Why does liquid does not fill the container completely in which it is kept ? -Science

Last Answer : A liquid does not fill its container completely because its particles are held fairly strongly by the interparticle forces and hence cannot leave the body of the liquid to fill the whole container.

Description : Give reason: Water kept in porcelain container will not get cooled if it is glazed.

Last Answer : Glazing plugs the pores present in porcelain articles. If pores are present, water oozes from these pores and gets evaporated. This has a cooling effect on the water inside, As the pores are plugged, water does not get evaporated hence no cooling.

Description : Radioactive materials should be kept in the container made of : (1) Fe (2) Al (3) Pb (4) Steel

Last Answer : (4) Steel Explanation: Radioactive materials are first encased in resin or concrete and sealed in steel drums. The drums are then packed into concrete casks and placed in concrete trenches up to 18 metres deep.

Description : A fluid is a substance, that (A) Has to be kept in a closed container (B) Is almost incompressible (C) Has zero shear stress (D) Flows when even a small shear is applied to it

Last Answer : (D) Flows when even a small shear is applied to it

Description : Radioactive materials should be kept in the container made of : (1) Fe (2) Al (3) Pb (4) Steel

Last Answer : Steel

Description : Can anyone help me with this? Chlorine and carbon monoxide gases are mixed in a 1.00L container and the following equilibrium is established: CO(g) + Cl2(g) COCl2(g).. Initially 1.5 mol of ... monoxide. At equilibrium, 0.8 mol of COCl2(g) was found. How do you calculate the percent reaction?

Last Answer : For a start, your equation isn't balanced; it should be Cl2 (Cl2, not 2Cl, because of HONClBrIF). Given this, if we assume the reaction goes to completion, 1.5 mol Cl2 will produce 1.5 mol ... .3% Incidentally, is that supposed to be CO or Co? It has no effect on the calculation, just curious.

Description : If 48.0 g of O2 and 4.4 g of CO2 are placed in a 10.0 L container at 21c. what is the pressure of mixture of gases?

Last Answer : Need answer

Description : Hydrofluoric acid is not kept in glass bottles because it reacts with - (1) visible light (2) silicon dioxide of glass (3) aluminium oxide of glass (4) sodium oxide of glass

Last Answer : (2) silicon dioxide of glass

Description : Silver nitrate solution is kept in brown bottles in laboratory because (1) it reacts with ordinary white bottles (2) brown bottles stops the passage of light through it (3) brown bottles do not react with it (4) brown bottles react with it

Last Answer : brown bottles stops the passage of light through it

Description : Which of the following non-metal reacts and catches fire on exposure to air? a) phosphorous b)nitrogen c)sulphur d)hydrogen

Last Answer : a) phosphorous

Description : Among noble gases, only xenon reacts with flourine to form stable xenon fluorides, because xenon

Last Answer : Among noble gases, only xenon reacts with flourine to form stable xenon fluorides, because xenon A. ... D. is the most readily available noble gas

Description : Florida disappears, where do Florida Men go?

Last Answer : Depends on the plea bargain

Description : Why am I in very heavy traffic, and then it suddenly disappears?

Last Answer : I put it in the category of mysteries of the universe.

Description : In do not disturb mode, I notice the moon symbol at the top of the ipad disappears when I exit an app. What does this mean?

Last Answer : answer:The “Do Not Disturb” mode is on. It is only on while you are in an app, when you leave the app it turns off “Do Not Disturb” mode.

Description : How far before your honesty disappears?

Last Answer : Relevant Ferengi Rules of Acquisition: 1. Once you have their money, you never give it back. 9. Opportunity plus instinct equals profit. 10. Greed is eternal. 14. Anything stolen is pure profit. ... man can afford anything except a conscience. 263. Never allow doubt to tarnish your lust for latinum.

Description : Cursor disappears from the desktop?

Last Answer : Can you see the mouse pointer, or does that also disappear?

Description : What is a great movie or book in which a character suddenly and mysteriously Disappears?

Last Answer : Happy Days. Chuck cunningham mysteriously disappears without any explanation. Spooooky! :)

Description : You get many of me, but never enough. After the last one, your life soon will snuff. You may have one of me but one day a year, When the last one is gone, your life disappears.What am I? -Riddles

Last Answer : Your birthday.

Description : If two letters are very close, for the convenience of pronunciation, if both of them merge into one letter or transform into it, or if one of them disappears or converts to both, then such a union is called a treaty. 'Who gave this definition ?

Last Answer : If two letters are very close, for the convenience of pronunciation, if both of them merge into one letter or transform into it, or if one of them disappears or converts, then such a union is called a treaty . ' Muhammad Shahidullah gave.

Description : My mobile phone keeps turning off :( I bought a new flashlight and it always turns off I really don't know what to do with it

Last Answer : "out of nowhere" it will definitely not be - you just can't find the cause ... a) change the phone b) choose the service c) if you want to "play" (or some DIY) - clean the battery contacts - ... not see with your eyes (cold, cracked board ...) - and it is not worthwhile to change something so old.

Description : The nuclear membrane disappears in

Last Answer : The nuclear membrane disappears in A. Late prophase B. Early prophase C. Metaphase D. Telophase

Description : What happens According to Einstein's equation if 1 kg of mass disappears during a reaction?

Last Answer : the law of conseration of mass is violated.

Description : What 2 ways water disappears in a water cycle?

Last Answer : Feel Free to Answer

Description : What are three ways water disappears in a water cycle?

Last Answer : Feel Free to Answer

Description : What would happen if all friction suddenly disappears?

Last Answer : It would be like trying to walk across a more slippery surface than the ice on an ice rink. Your car brakes would simply lock up and leave you sliding forward into destruction.

Description : If 1 kg of mass disappears during a reaction then?

Last Answer : Need answer

Description : Why a drop of ether on your skin disappears fast and the skin feels cool?

Last Answer : Ether is a form of alcohol - which evaporates very quickly. Thistakes heat away from your skin, and thus you feel cold in thatarea.

Description : What would happen if all friction suddenly disappears?

Last Answer : It would be like trying to walk across a more slippery surface than the ice on an ice rink. Your car brakes would simply lock up and leave you sliding forward into destruction.

Description : According to Einsteins equation if 1 kg of mass disappears during a reaction then ______?

Last Answer : 9x10^16 J of energy is produced. Is the answer for apex

Description : Marasmus differs from Kwashiorkor in the which of these following respect (A) Mental retardation occurs in kwashiorkor but not in marasmus (B) Growth is retarded in kwashiorkor but not in marasmus ... in marasmus but not kwashiorkor (D) Subcutaneous fat disappears in marasmus but not in kwashiorkor

Last Answer : Answer : D

Description : Azeotropism for ethyl alcohol-water system disappears by (A) Increasing temperature (B) Decreasing pressure (C) Increasing pressure (D) No means

Last Answer : (B) Decreasing pressure

Description : In a perfectly inelastic collision, kinetic energy A. totally disappears B. is increased C. is decreased D. is unchanged

Last Answer :  totally disappears

Description : The thermal boundary layer at NPr > 1 (A) Is thicker than hydrodynamic boundary layer (B) Is thinner than hydrodynamic boundary layer (C) And the hydrodynamic boundary layers are identical (D) Disappears

Last Answer : (B) Is thinner than hydrodynamic boundary layer

Description : The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C. (A) 768 (B) 908 (C) 1400 (D) 1539

Last Answer : Option A

Description : In the short run if the price is above the average total cost in a monopolistic competitive market, the firm makes (a) Profits and new firms join the market ; (b) Profit and bar entry to new firms; (c) Makes losses and exit the market ; (d) Quick profit and disappears

Last Answer : (a) Profits and new firms join the market ;

Description : As mitosis (pron: mie-TOE-sis) begins, the structure in the nucleus that disappears is the: a) spindle b) nucleolus (pron: new-klee-O-lus) c) chromatid (pron: KROME-a-tid) d) centromere (pron: SEN-tro-meer)

Last Answer : ANSWER: B -- NUCLEOLUS

Description : During the final stage of cell division, the mitotic apparatus disappears, the chromosomes become attenuated, the centrioles duplicate and split, the nuclear membrane becomes reconstituted and the nucleolus reappears. This ... as: a) prophase (pron: prO-phase) b) metaphase c) anaphase d) telophase

Last Answer : ANSWER: D -- Telophase

Description : Which of the following method is used to separate a mixture of salt and camphor? -Science

Last Answer : Sublimation is a technique used to separate the components of a mixture containing a sublimable volatile solid and a non-sublimable impurity. Therefore, the mixture of camphor and sodium chloride can be separated by the process of sublimation.

Description : Consider the following changes: 1. Curdling of milk 2. Sublimation of camphor 3. Drying of paint 4. Oxidation of SO2 to SO3 The chemical changes are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Last Answer : Ans:(b)

Description : The compound that is not a natural product is (a) pinene (b) citral (c) camphor (d) styrene

Last Answer : Ans:(d)

Description : Which of the following cannot be purified by sublimation? (a) Iodine (b) Camphor (c) Citric acid (d) Naphthalene

Last Answer : Ans:(c)

Description : Camphor can easily be purified by the process of (a) Sublimation (b) Distillation (c) Crystallisation (d) Sedimentation

Last Answer : Ans:(a)

Description : What happens when? a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. b) A pinch of mercuric oxide is kept in a test tube. c)A small crystal of silver nitrate is dissolved in distilled water and a drop of ammonium hydroxide & a pinch of glucose powder are added.

Last Answer : a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. After a few hours a coating of copper is seen on iron nail/plate. It is based on displacement reaction. ... on the inner walls of the test tube. Aldehyde group in glucose reduced silver nitrate to metallic silver.

Description : A mixture of camphor and benzoic acid can be easily separated by which method? -General Knowledge

Last Answer : The answer is 'Chemical method'

Description : A mixture of camphor and benzoic acid can be easily separated by which method? -General Knowledge

Last Answer : Camphor is a sublime solid, hence mixture of camphor and benzoic acid can be separated by sublimation when benzoic acid remains in the pot while camphor vapourise and collected separately.