Define Crystals & also define how they are prepared.

Define Crystals & also define how they are prepared.
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Ans : Crystals. Crystals are solids that form by a regular repeated pattern of molecules connecting together. A crystal or crystalline solid is a solid material whose atoms are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.
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Describe how crystals of copper sulphate are prepared. -Science-7

Description : Describe how crystals of copper sulphate are prepared. -Science-7

Last Answer : Take a cupful of water in a beaker and add a few drops of dilute sulphuric acid. Heat the water. When it starts boiling, add copper sulphate powder slowly. Continue to add copper sulphate powder ... to cool without disturbing the solution. After some time, we can see the crystals of copper sulphate.

Mark correct option a) Bill of franking machine used is prepared in form MS10 b) In RMS offices, letter box key should be kept in custody of Sorting Assistant c) Greeting cards are treated as first class mails in sorting. During the greeting season they are given air lift also without air surcharge otherwise surface mode.d) Label bundle should not contain more than 50 to 60 letters & post cards.e) All of the above

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Last Answer : ) All of the above

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons. (A) Lack of free (B) Excess of (C) Decrease in (D) None of these

Description : A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons. (A) Lack of free (B) Excess of (C) Decrease in (D) None of these

Last Answer : (B) Excess of

What is the colour of ferrous sulphate crystals? How does this colour change after heating? -Chemistry

Description : What is the colour of ferrous sulphate crystals? How does this colour change after heating? -Chemistry

Last Answer : Answer.The colour of ferrous sulphate is pale green. The colour changes to reddish brown on heating due to formation of iron (III) oxide. Give an example each for ... reactions. Write relevant balanced chemical equations also. Thermal decomposition reaction: Photochemical decomposition reaction:

2g of ferrous sulphate crystals are heated in a dry boiling tube. (i) List any two observations. (ii) Name the type of chemical reaction taking place. (iii) ‘Write the chemical equation for the reaction. -Chemistry

Description : 2g of ferrous sulphate crystals are heated in a dry boiling tube. (i) List any two observations. (ii) Name the type of chemical reaction taking place. (iii) ‘Write the chemical equation for the reaction. -Chemistry

Last Answer : Answer. (i) •Green colour of Fe SO4 disappears and reddish brown solid is formed. • Smell of burning sulphur. (ii) Decomposition reaction

Why do metals conduct electricity but crystals of ionic compounds do not conduct electricity ?

Description : Why do metals conduct electricity but crystals of ionic compounds do not conduct electricity ?

Last Answer : Metals have free electrons. These electrons, created to gain the electromagnetic positivity and octal structure of the metal, flow from the negative side of the electric source to the positive edge ... electrons does not occur in it. Therefore crystals of ionic compounds do not conduct electricity.

What is the affect of pressure on NaCl type crystals ?

Description : What is the affect of pressure on NaCl type crystals ?

Last Answer : The coordination No. of NaCl increases from 6 to 8 .

Crystals of ice are: w) isometric x) tetragonal y) hexagonal z) orthorombic

Description : Crystals of ice are: w) isometric x) tetragonal y) hexagonal z) orthorombic

Last Answer : ANSWER: Y -- HEXAGONAL

Cubic crystals containing lattice points only at the corners are called: w) body centered x) face centered y) simple z) hexagonal

Description : Cubic crystals containing lattice points only at the corners are called: w) body centered x) face centered y) simple z) hexagonal

Last Answer : ANSWER: C-SIMPLE 

Chlorine is used in swimming pools as a disinfecta In its natural, standard state it is a: w) blue liquid x) colorless crystals y) yellow-green gas z) reddish-brown gas

Description : Chlorine is used in swimming pools as a disinfecta In its natural, standard state it is a: w) blue liquid x) colorless crystals y) yellow-green gas z) reddish-brown gas

Last Answer : ANSWER: Y -- YELLOW-GREEN GAS

Crystals in the bottom of my booze - what could they be?

Description : Crystals in the bottom of my booze - what could they be?

Last Answer : You are essentially growing Rock Candy…be careful as the longer this liquor evaporates the stronger the liquor gets.

A blanket of crystals that covers all. Nothing can escape its fall. It will put you to sleep in a harsh way, and you will never again see the day It's on the earth always and forever, part of our lives leaving, never. Floats and falls like little butterflies. Catch them and they will surely die. What am I? -Riddles

Description : A blanket of crystals that covers all. Nothing can escape its fall. It will put you to sleep in a harsh way, and you will never again see the day It's on the earth always and forever, part ... never. Floats and falls like little butterflies. Catch them and they will surely die. What am I? -Riddles

Last Answer : Snow.

Above image shows an experiment where copper sulphate crystals are heated. When we heat the crystals, they turn white. If you moisten the crystals again with water you will find that colour of crystals reappears . (1) How many water molecules are present in one formula unit of copper sulphate (a)5 (b)2 (c)6 (d)7

Description : Above image shows an experiment where copper sulphate crystals are heated. When we heat the crystals, they turn white. If you moisten the crystals again with water you will find that colour of crystals reappears . (1 ... are present in one formula unit of copper sulphate (a)5 (b)2 (c)6 (d)7

Last Answer : (a)5

Define intermolecular forces. Also write down effect of intermolecular forces on melting points & boiling points of substances?

Description : Define intermolecular forces. Also write down effect of intermolecular forces on melting points & boiling points of substances?

Last Answer : The forces of attraction present between the molecules of a compound are called Intermolecular forces''. Effect of intermolecular forces on the m.p and b.p of substances If intermolecular forces of attractions in ... . And if these forces are weak then the m.p and b.p will be relatively lower.

Can one meditate using online pictures/videos of crystals?

Description : Can one meditate using online pictures/videos of crystals?

Last Answer : IMO. The practice would be self induced. Not reliant on the actual crystal. Focus, and self discipline should bring about whatever desired effects that could be obtained from the same exercise with the crystals….

Is there any intrinsic power in quartz crystals and, if so, what is it?

Description : Is there any intrinsic power in quartz crystals and, if so, what is it?

Last Answer : No. There is no “power” in quartz crystals other than their power to make gullible people spend lots of money on them!

Why are there crystals in my cat's urine?

Description : I just noticed crystals in my cat's urine. Should I be concerned? Why is this happening? What should I do to fix it?

Last Answer : Crystals in the cat's urine are a sign of a lower urinary tract disorder. They can be caused by not enough water intake and the cat's diet. Changing to a canned food diet can help but do so ... with little veggies. Depending on the severity of the problem, take your cat to the vet to be examined.

i have crystals growing on my nectarines, what do i do

Description : i have crystals growing on my nectarines, what do i do

Last Answer : Need Answer

What was the frost like crystals on my grass early this morning June 27th?

Description : What was the frost like crystals on my grass early this morning June 27th?

Last Answer : Need Answer

if a substance forms crystals when it solidifies, its _______ points are the same. -General Knowledge

Description : if a substance forms crystals when it solidifies, its _______ points are the same. -General Knowledge

Last Answer : If a substance forms crystals when it solidifies, its melting and freezing points are the same.

The process of forming crystals from their solutions is called _______ . -Science

Description : The process of forming crystals from their solutions is called _______ . -Science

Last Answer : The process is crystallisation.

ice crystals forming on a window a chemical change?

Description : ice crystals forming on a window a chemical change?

Last Answer : yes

what are piezoelectric crystals from ...

Description : ... in piezo lighters?

Last Answer : The piezoelectric effect can only occur with crystals that do not have a center of symmetry. The best known piezoelectric substance is monocrystalline quartz, crystal or barium thianate. For ... , a piezoelectric effect was observed with the Seignett salt (potassium sodium tartrate tetrahydrate).

How long does it take for crystals to work?

Description : How long does it take for crystals to work?

Last Answer : I don't have knowledge in this field but you can consult regarding field about this. if you came to know about the uses of crystal and other details you can post this in this forum.

Kidney crystals are solid clusters of

Description : Kidney crystals are solid clusters of

Last Answer : Kidney crystals are solid clusters of A. Calcium nitrate and uric acid B. Phosphate and uric ... uric acid D. Calcium metabisulphite and uric acid

Kidney crystals are solid clusters of

Description : Kidney crystals are solid clusters of

Last Answer : Kidney crystals are solid clusters of A. Calcium nitrate and uric acid B. Phosphate and uric ... uric acid D. Calcium metabisulphite and uric acid

What is smooth glassy rock that forms when lava cools so fast that there is no time for crystals to form?

Description : What is smooth glassy rock that forms when lava cools so fast that there is no time for crystals to form?

Last Answer : Obsidian

What property of liquid crystals makes them useful for displays?

Description : What property of liquid crystals makes them useful for displays?

Last Answer : Liquid crystals can rotate the angle of polarization of light bydifferent amounts depending on the strength of an electric fieldacross them. This allows them to be used in high speed opticalswitches controlling the amount of light visible in pixels of adisplay.

Is not a major component of magma A. partially melted mineral crystals B. water C. dissolved gases D. lava?

Description : Is not a major component of magma A. partially melted mineral crystals B. water C. dissolved gases D. lava?

Last Answer : Water is not a major component of melted rock. The heat hasturned any water into steam.

What would you do to form a heterogeneous mixture of sugar and salt crystals?

Description : What would you do to form a heterogeneous mixture of sugar and salt crystals?

Last Answer : The mixture of salt and sugar crystals is heterogeneous.

If a substance forms crystals when it solidifies its melting and freezing points are the same?

Description : If a substance forms crystals when it solidifies its melting and freezing points are the same?

Last Answer : Melting and freezing points are identical.

Are Growing crystals dead living or inorganic?

Description : Are Growing crystals dead living or inorganic?

Last Answer : They're inorganic. The crystals 'grow' by molecules of the samesubstance in the surrounding liquid sticking to the 'seed'crystal.

What is Ice crystals that fall to the earth in frozen clumps?

Description : What is Ice crystals that fall to the earth in frozen clumps?

Last Answer : Snow

What is acopy of a fossil produced by filling a mold for settlements or crystals?

Description : What is acopy of a fossil produced by filling a mold for settlements or crystals?

Last Answer : Feel Free to Answer

What is the melting point of washing soda crystals?

Description : What is the melting point of washing soda crystals?

Last Answer : Feel Free to Answer

What does Liliana used 444 dark power crystals to raise 141414 zombie soldiers. She wants to know how many zombie soldiers (z)(z)left parenthesis z right parenthesis she can raise with 101010 dark pow?

Description : What does Liliana used 444 dark power crystals to raise 141414 zombie soldiers. She wants to know how many zombie soldiers (z)(z)left parenthesis z right parenthesis she can raise with 101010 dark pow?

Last Answer : What is the answer ?

What is mineral crystals of quartz biotite mica and amphibole are produced primarily by?

Description : What is mineral crystals of quartz biotite mica and amphibole are produced primarily by?

Last Answer : Cooling and soildification of magma.

Is urea crystals element?

Description : Is urea crystals element?

Last Answer : No, urea is a nitrogen compound.

Why ionic crystals don't conduct electricity in the solid state?

Description : Why ionic crystals don't conduct electricity in the solid state?

Last Answer : In the solid state ionic crystals are not dissociated in ions.

name three things that crystals grow from?

Description : name three things that crystals grow from?

Last Answer : salt seed sugar

How large crystals form in a metamorphic rock?

Description : How large crystals form in a metamorphic rock?

Last Answer : 10

Which one of the following statements is NOT correct? [IAS 2003] (a) Black cotton soil of north-west India was formed by the weathering of basaltic lava rocks (b) Sedimentary rocks are distinguished from other types of rocks by the presence of distinct layers (c) Granite has large crystals of quartz, feldspar and mica in it (d) A metamorphic rock is softer and less compact than its original type

Description : Which one of the following statements is NOT correct? [IAS 2003] (a) Black cotton soil of north-west India was formed by the weathering of basaltic lava rocks (b) Sedimentary rocks are distinguished ... feldspar and mica in it (d) A metamorphic rock is softer and less compact than its original type

Last Answer : Ans: (d)

Raphides are the crystals of: (a) Calcium oxalate (b) Calcium (c) Calcium phosphate (d) Calcium carbonate

Description : Raphides are the crystals of: (a) Calcium oxalate (b) Calcium (c) Calcium phosphate (d) Calcium carbonate

Last Answer : Ans. ((a))

Which of the following characteristics is not typical of ionically bonded crystals? (a) Has no sharp melting point (b) Cleave into definite cleavage planes (c) Conducts when melted (d) Shatters when crystal is distorted

Description : Which of the following characteristics is not typical of ionically bonded crystals? (a) Has no sharp melting point (b) Cleave into definite cleavage planes (c) Conducts when melted (d) Shatters when crystal is distorted

Last Answer : Ans:(a)

Deposition of uric acid crystals at the joint is the cause of - (1) Arthritis (2) Osteoporosis (3) Osteomalacia (4) Rickets

Description : Deposition of uric acid crystals at the joint is the cause of - (1) Arthritis (2) Osteoporosis (3) Osteomalacia (4) Rickets

Last Answer : (1) Arthritis Explanation: Gout is a medical condition usually characterized by recurrent attacks of acute inflammatory arthritis- a red, tender, hot, swollen joint. It is caused by elevated ... . The uric acid crystallizes, and the crystals deposit in joints, tendons, and surrounding tissues.

'Cryogenics' is a science dealing with – (1) high temperatures (2) low temperatures (3) friction and wear (4) growth of crystals

Description : 'Cryogenics' is a science dealing with – (1) high temperatures (2) low temperatures (3) friction and wear (4) growth of crystals

Last Answer : (2) low temperatures Explanation: Cryogenics is the study of how to get to low temperatures and of how materials behave when they get there. Besides the familiar temperature scales of Fahrenheit and ... modern processes being used to treat metals (as well as other materials) is cryogenic tempering.

Sodium carbonate crystals lose water molecules. What is this property called?

Description : Sodium carbonate crystals lose water molecules. What is this property called?

Last Answer : Efflorescence

Which is the hardest form of carbon; whose crystals are octahedral in shape?

Description : Which is the hardest form of carbon; whose crystals are octahedral in shape?

Last Answer : Diamond

__________ centrifuge is the most suitable for separation of non-friable crystals. (A) Tubular bowl (B) Disc-bowl (C) Perforated horizontal basket continuous (D) Suspended batch baske

Description : __________ centrifuge is the most suitable for separation of non-friable crystals. (A) Tubular bowl (B) Disc-bowl (C) Perforated horizontal basket continuous (D) Suspended batch baske

Last Answer : (C) Perforated horizontal basket continuous