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65201.

During the electrolysis of water how much we identify the as present in each tube

Answer»
65202.

Why magnesium ribon should be cleaned before burning in air ??

Answer» It forms a layer of magnesium oxide on its surface which often hinders the burning of magnesium thus it is rubbed with sandpaper to remove MgO.
Bcoz it forms a layer of magnesium carbonate....while reacts with moisture...which prevent it to burn/react......therefore its to be cleaned....before burning.....?
65203.

What will happen when unsaturated hydrocarbon is heated at 443k temperature with sulphuric acid

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65204.

What is 74th element in periodic table

Answer» Tungsten (w)
65205.

Can anybody else...

Answer»
65206.

give a short account on menstruation in human females.. .acc. to 3 marks..plz

Answer» Menstruation, or a menstrual period, is the periodic shedding of the lining of a woman\'s uterus. It is one of the phases of the menstrual cycle. The uterine lining breaks down into a bloody substance. It then passes down through the cervix and exits through the ******. The process usually lasts from three to five days. The amount of menstrual blood can vary from period to period and from woman to woman.
65207.

what is diploid

Answer» Diploid is type of chromosome which take part is mitosis cell division
65208.

C2h5oh+o2=

Answer» Ethanol
65209.

How is protien digested by our body?what is digestinng enzyme and its smaller parts ?

Answer» Well what is the pepsinogen?
Pepsin- secreted in StomachTrypsin- small intestine (secreted by pancreas)Chymotrypsin- small intestine secreted by pancreas)Peptidase- small intestine
65210.

Name the hormone secreted by pineal gland??

Answer» Melatonin hormone which regulate biological clock such as mensturation cycle
65211.

Name the largest cell present in human body

Answer» Neuron
Largest cell in human body is female ovum.
Ovum is the largest cell present in human body
65212.

What is chloroalkalin process

Answer» When electricity is passed through an aqueous solution of sodium chloride it decomposes to form sodium hydroxide. The process is called the chlor-alkali alkali process because of the products formed: chlor for chlorine and alkali for Sodium Hydroxide. Chlorine gas is given off at the anode and hydrogen gas at the cathode.An aqueous solution of sodium chloride is called brine.2NaCl (aq) + 2H2O(l) ---(electrolysis)→ 2NaOH(aq) + Cl2(g) + H2(g).\xa0
65213.

What is electronic configration of plaster of paris

Answer» No electronic configuration because plaster of paris is a mixture not an element
65214.

What do you mean by functional group?

Answer» Functional groups are defined as specific atoms, group of atoms or ions which are part of a larger hydrocarbon chain and impart characteristic properties to the compounds.Some of the functinal groups:\xa0\tAlcohols-OHAldehydes-CHO\t
A group of compound having same chemical property is called functional group . Ex - Cl , Br , OH , etc ......
65215.

Why docters avice cancer patents are live alone ?

Answer»
65216.

How do we make a metthane

Answer»
65217.

How do non metal react hydrogen .? explain with example

Answer» Non-metals react with hydrogen to form covalent hydrides .For example : Sulphur combines with hydrogen to form Hydrogen sulphideH2(g) + S(l) → H2S(g)
65218.

Two solution have PH number 4 and 9 respectively which solution has more H+ ion concentration?

Answer» 4
4 have higher h+ ion concentration
4
The solution having ph 4
65219.

Do black contains seven colours

Answer» Yes
65220.

Describe the function of medula, cerebellum, pones?

Answer» 1.MEDULLA-it controls various involuntary actions such as Heartbeat breathing blood pressure and peristaltic movements of alimentary canal it is also the controlling Centre for reflex such as swallowing coughing sneezing secretion of saliva and vomiting 2.CEREBELLUM-cerebellum helps in maintaining posture and balance of the body it also enables us to make precise and accurate movement the cerebellum coordinates is most body movements such as walking dancing riding a bicycle and picking up a pencil3.PONS-pons take part in regulating respiration
65221.

2015 CBSE question paper

Answer»
65222.

What is inherited characters?

Answer» Characters that are transferred from previous or one generation to the next generation.
Character which we receive from parents ex,colour of eyes
Characters which are transferred from one generation to the next generation.
I dont know
65223.

Why are carbon compounds poor conductor of electricity

Answer» It is so because carbon compounds are co valent compounds and are formed by sharing electons and hence the bond between two elements is not too strong as compared to electro valent compounds.
\tCarbon compounds are covalent compounds. Covalent compounds are formed by sharing of electrons.\tThe electrons in the outermost shell are shared by the nearmost atoms which makes them unavailable for conducting electricity.\tAlso no chaged particales are formed in the solution.\xa0\tHence, carbon compounds along with other covalent compounds are poor conductors of electricity.\tOnly at high temperature, some lectrons move from valence band to conduction band. But the number of charge carriers are low, hence they are poor conductors.\xa0
Because they dont have charged particles or free electrons
65224.

Why series combination drives more I than II Combination

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65225.

Why the colour of sun appear reddish?

Answer» it is because the sun is having white colour ,when the sun light enters the earth the blue color having the shorter wavelenght is scattered by the atmospheric particles so atlast the red color having longer wavelenght os scattered the least so it reaches to our eyes clearly
It is so because the sun is far away from the earth and the light have 7 colours i.e.(vibgyor) will scattered when enter our atmosphere. the wavelength of red colour is highest therefore, red colour is scattered less. So we saw the colour of the sun red
65226.

Describe about modern periodic table

Answer» Its clear
The long form of periodic table consist of vertical columns called groups and horizontal rows called periods. Elements are arranged in the increasing order of atomic numbers. ... Elements are placed in periods based on the number of shells in their atoms.
65227.

Define covalent bonding

Answer» Sharing of electrons between two metals is known as covalent bonding
Formation of bond by mutual sharing of electrons is called covalent bond.
65228.

How to understand chemistry class 10

Answer»
65229.

Give an example of a plant hormone that promotes its growth?where is it synthesised?

Answer» Auxin
Auxin , it is synthesised at the shaded region of the plant as it gets distroyed during sunlight
65230.

Why do acid rain happen?

Answer» Gases produce to the burning of fossil fuels give rise to acid rain after reacting with water vapour in air .when Carbon dioxide , sulphur dioxide and nitrogen dioxide combine with water in the atmosphere then carbonic acid, sulphuric acid , and nitric acid are formed.
When Ph Lever goes below 5.7 it called acid rain. Many Plants and animals can effect badly by acid rain
Acid rain is caused by the chemical reaction tht beings when compound like sulfur-dioxide and nitrogen oxide released into the air
65231.

Why washing soda when exposed in air converted into washing powder ??

Answer»
65232.

Why plants take oxygen for making their food? Explain!

Answer» Who Say you that plants take oxygen?Plants take CO2, Water and minerals from earth through there roots
65233.

What are anacid

Answer» According to Arrhenius theory of acids and bases, an acid is a substance that produces H+(aq) ions or H30+ ions(hydronium ion) when dissolved in water
Those solutions which give h30+ ions in waters are called acids . For ex-H2SO4 HCL HNO3 etc.
65234.

What are the advantages of sexual reproduction over asexual reproduction? ?? please ans.

Answer» Tell me if there is any other point...
Thankuu. ...guyz..
1.Single parent is involved in asexual reproduction while in sexual reproduction two parents are involved.2. Variation takes place in sexual reproduction and in asexual reproduction variation don\'t takes place.The young ones are exact copies of their parent organism.
One point has already been answered by Risabh PandeyAsexual reproduction can be carried on with only one parent but sexual reproduction needs two parents.Asexual reproduction doesn\'t involve fusion of gametes while sexual reproduction involves fusion of gametesSo totally 3 points...I hope it helped you
The main advantage of sexual reproduction is it creates variation between organisms as well as asexual reproduction doesn\'t create variation
3 to 6 points pleasee
65235.

Proved that f/f+u=f-v/f in four expression?

Answer» Both are equal to magnification of spherical mirror . Once multiply mirror formula by U and then by V .Try to get both the two equations in terms of f v m or m f u .
65236.

isomers pentane

Answer» 1. neo-pentane or 2,2 dimethyl propane 2. 2 methyl butane 3. n-pentane or pentane
65237.

What is lavigation?

Answer»
65238.

Calculate the speed of light in water of refractive index 4÷3 if the speed of light in air is 3 ×10

Answer» Since Refractive index of water = speed of light in air/speed of light in water Therefore speed of light in water=speed of light in air/refractive indexSpeed of light in water= 3×10is to power 8/ 4/3 =2.25×10is to power8 m/s(approx)
Refractive index = speed of light in air / speed of light in water4/3=3*10^8/speed of light in waterSpeed of light in water=3*10^8*3/4Speed of light in water=9*10^8/4Speed of light in water=2.25*10^8
65239.

Saturated or unsaturated which is more healthy for our body or health?

Answer» Unsaturated is more healthy for our body and health.
Saturated
65240.

What do you mean by lateral inversion of the image

Answer» Lateral inversion of image mean the image formed on plane mirror became reverse.EX-the right hand became left and left hand became right
65241.

Why does the sky appear dark insted of blue to an astronaut.

Answer» Because at outer space there is no atmosphere and because there is no atmosphere so no refraction takes place.
why
65242.

pH value of water

Answer» 7
7
7
65243.

What is the process of changing from oxygen to carbon dioxide in human body

Answer» Respiration
65244.

Why light travel in straight line

Answer» Light is a stream of photons going at an incredible speed.And electrons have charges and mass as well.Light actually doesn\'t always travel in a straight line.It travels in a straight line relative to us.According to general relativity,light is seen to curve around a huge mass like the sun.
65245.

Why nerve look like green in colour

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65246.

Why tree take carbon dioxide

Answer» Tree take carbon dioxide for photosynthesis and respiration.
Tree take carbon dioxide to perform photosynthesis.In photosynthesis tree need carbon dioxide and water to prepare food(glucose).
65247.

Where are kindeys located in our human body

Answer» Kidneys are located in abdominal cavity
Kindneys are located in the abdomeb ,one on either side of the backbone
65248.

What is endothermic reaction and how can balanced

Answer» Those chemical reaction in which heat is evolved is called endothermic reaction.
65249.

Bhj

Answer»
65250.

What is spream

Answer» Tiny and motile bodies that use their long tail to move through the female reproductive tract is known as sperms.
This is sperm not spream
Sperm is the male reproductive cell and is derived from . In the types of sexual reproduction known as anisogamy and its subtype oogamy, there is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell.