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6501.

Mention the percentage of carbon in earth\'s crust.

Answer»
6502.

Why we store silver chloride in dark bottle

Answer» To prevent it from decomposition it is known as silver chloride decompose silver and chlorine in the presence of light therefore it kept in dark bottles because dark bottles does not allow light to enter it and decomposition is prevented
To prevent the effects of sunlight
Actually silver chloride undergoes decomposition reaction when it is exposed to sunlight
6503.

Explain why calcium metal after reacting with water starts floating on its surface

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6504.

Please describe evolution

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6505.

Isss app par h na.... QUESTIONS se zyaada PERSONAL MATTER zyaada discuss karte hai....

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6506.

From which book question will come from in this exam

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6507.

Guys im back ??

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6508.

Oxidising agent vo hota hain jab hydrogen add ho and oxygen na ho...means reduction ka same....

Answer» The substance which gives oxygen for oxidation and removes hydrogen is called an oxidising agent.. EXAMPLE-CuO + H2---> Cu + H2O. Hydrogen is being oxidised to water so this H2 is oxidising agent.
6509.

What is the S.I Unit of strength of magnetic field?

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6510.

What are the Faraday \'s law of electromagnetic induction?

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6511.

Shivangi kya ho gaya yr..?? Keshav k saath??

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6512.

How can we contribute in mainta

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6513.

Why magnesium ribbon is cleaned by rubbing with a sand paper before burnt in air?

Answer» Because when it leave in open so it produce a layer of oxygen so when burnt it produce a layer of magnesium oxide
To remove the layer of magnesium oxide
6514.

Explain human eye ?

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6515.

Why is it that non-metals do not replace hydrogen from dilute acids?

Answer» Bcoz they are acceptor of electron and not able to give electron to hydrogen ions of acid to form hydrogen gas.
6516.

Electric power

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6517.

Tanmay ki aisi ki tesi sale kutte

Answer» Agar gaali Deni hai toh khud Ko de bekaar mein kisiko badnaam kyon karta hai
6518.

What is homozygous.

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6519.

5fruits name

Answer» Apple, mango, orange, grapes and kiwi
1st class ka baccha thik se Bata sakta h mujhe nhi yaad
6520.

What is soaps

Answer» Soaps are sodium and potassium salts of long chain fatty acids containing 12 to 18 carbon atoms.Soaps are denoted by the general formula RCOO-Na+, where R denotes any long chain alkyl group containing 12 to 18 carbon atoms.
Soaps are water-soluble sodium or potassium salts of fatty acids. Soaps are made from fats and oils, or their fatty acids, by treating them chemically with a strong alkali.
Long chain compounds carbonic acids
6521.

Date of exams 10 class

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6522.

Should I get science bio lab manual PDFs from you?

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6523.

why is diffusion insufficient to meet the oxygen requirement of the body ?

Answer» Bcz this process is very much slow in comparison ti the requirement to our body . It is fact that if throgh diffusion oxyugen will reach in cell then it will take 3 years to reach to every cell . si ti meet with demands our body needs a system of transportation
6524.

How is the width of lens affects it\'s focal lengths?

Answer» Thicker the lens , smaller the focal length
Thin lens :- large fical length !! Thick lens :- less focal length
Thicker lens will have smaller focal length than a thin lens
6525.

Write benefits of khadin system

Answer» Harvest rainwater ...used in Rajasthan
6526.

What are two allotropes of carbon

Answer» Diamond and graphite
Diamond , graphite , Buckminster fullerance
Diamond, graphite and
Diamond and graphite
6527.

What is layering from reproduction ??

Answer» Layering is an asexual mode of reproduction in which a branch is burried under soil and after some time it develops roots and later on it will cut off and grows into a new plant.....
Layering has a common means of vegetative propagation of numerous species in natural environments. Layering is also utilized by horticulturists to propagate desirable plants
6528.

What is allels

Answer» Of*
Set if trait
6529.

Difference between polynation and fertilisation

Answer» Pollination :- only in plants !! Fertilisation :- any organisms
Pollination is the lricess by which pollen grain enters the stigma, styke & ovary !! Fertilisation is the pricess of fusion if make & femake gemetes
6530.

Difference between asexual and sexual 5 points

Answer» 5) genetic disease in not cured by asexual but can be repressed in sexual
4) clone is there by asexual but not in sexual
3) gamates is not present in asexual bt oresent in sexual
2) variation is not There in asexual but variation is present in sexual
1) asexual :- one member required !! Sexual :- bith male & femake required
6531.

Koi mujhe bta dega k xam kb se h board k

Answer»
6532.

Why we should use coal and petroleum judiciously

Answer» Spelling thike hai
For next generation use
Aslo produces harmful gases while combustion
They are fossil fuels and are limited in stock. ...If we will waste them to khatam ho jayenge
They are makes after a long time
Spelling mistake
Bcz it is exhaustibke resources
6533.

How many isomers are there of bromopentane?

Answer» 3 are possible
Make it ...not sure but 3 or 5
6534.

What are permanent magnets and electro magnets?give two uses of such

Answer» Electromagnet is used in AC genetator , permanent is used to find extracts of iron or cobalt nickel or to make magnet also
Permanent :- it is fixed and show magnetic property naturally !! Electromagnet :- have property of magnet due to electricity
6535.

What is the function nephron

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6536.

The formula of element \'X\' is 17 write the formula of its halide

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6537.

What is quotation.

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6538.

What is rheostat?????

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6539.

Plant hormone responsible for wilting of leaves

Answer» Absisic acid or growth inhibitor
6540.

Disadvantage of vegetative propagation....??

Answer» Disadvantages of Vegetative PropagationVegetative propagation has a potential impact on the biodiversity of a species.If a clone of a plant is susceptible to a certain disease, it is possible that the entire crops of the clone are susceptible to the same disease.Due to lack of genetic variation the plants may gradually loose their vigor.Plants are more prone to diseases that are specific to a certain species. This can cause destruction to the entire crop.
No variation
6541.

What is niche...in bio

Answer» Living place...(habitat)
6542.

What does fertilisition take place in female

Answer» Oviduct or fallopian tube
6543.

NaOh +Hcl

Answer» I think neutralisation rx.
6544.

What is the life support system of fetous

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6545.

IS ELECTRIC MOTOR AND A.C. , D.C. GENERATOR OUT OF SYLLABUS NOW? Class 10

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6546.

Name the various types of chemicals reaction

Answer» Combination reaction, decomposition reaction, displacement reaction, double displacement reaction, nutrilization reaction, precipitation reaction, etc
6547.

Method of contraception

Answer» 1.mechanical barrier method 2.surgical method 3.chemical method 4.copper T
Copper T and pills
6548.

Why doesn\'t a planet twinkle?

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6549.

Where is regeneration occur in human body

Answer» Liver
6550.

What are Isomers?

Answer» Have same formula of Covalent compound but have different structure
Isomers are each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.
The carbon chain which have same molecular formula but different in structures.