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It is difficult because dry LEAVES can CATCH fire easily .

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A. COPPER IS MORE REACTIVE THAN SILVER. HENCE WHEN COPPER WIRE IS DIPPED IN SILVER NITRATE ( AgNO3 ) SOLUTION FORMING COPPER NITRATE WHICH IS BLUISH GREEN IN COLOUR.

B. CU(S) + 2 AgNO3 (aq)....>Cu ( NO3 ) 2 (aq) + 2Ag (s)

THIS IS A DISPLACEMENT REACTION. A SHINING GREY WHITE DEPOSIT IF SILVER IS FORMED ON THE COPPER STRIP AND THE SOLUTION BECOMES BLUISH GREEN DUE TO THE FORMATION OF COPPER NITRATE.



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K SHELL=2
l shell =8
m shell=5
means valence electron =5
valency =8-5
=3

element of group 15 has atomic NUMBER 15 :::::
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Its about 200. i GUESS HOPE so not SURE are U a GIRL or not

I THINK it’s

Carbon DIOXIDE

False.
They are DRY and BLUE COLOURED because of WATER in CRYSTALLISATION in them.

oxidation reaction

whenever EITHER OXYGEN is added or hydrogen is removed, it is an oxidation reaction. eg - H2 +2cl- 2hcl

reduction reaction

whenever oxygen is removed or  hydrogen is removed.

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(a) Air is a mixture and not a pure substance as it contains many gases which can be separated by PHYSICAL methods and it also shows the PROPERTIES of its constituents.

(b) Simple distillation is USED to separate components when the difference in temperature of their (constituents') boiling points is more than 25℃. Fractional distillation is used when the difference in temperature of their (constituents') is less than 25℃. As air contains various gases and the difference in temperature of their boiling points is less than 25℃, fractional distillation is used here.

(c) During the distillation, nitrogen gas is obtained first, then argon followed by oxygen, this is because in distillation process the gas which has lowest boiling temperature evaporates, condenses and GETS collected in the beaker first. Nitrogen has the LOWER boiling point as compared to argon and oxygen that is why it is obtained first, then followed by the other two.

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Octasulphur

Octasulphur is an inorganic CHEMICAL with the chemical formula S
8. It is a YELLOW solid, and is odourless and tasteless. It is the most common allotrope of SULPHUR. It is a major industrial chemical that occurs WIDELY in nature.

Dry ammonia will not CHANGE the colour of litmus bcoz colour of litmus is changed by the HYDROXIDE ions. only in aqueous SOLN a base dissociates to give ions bcos water acts as a medium. dry ammonia GAS donot dissociate ions.
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FOCUS define as ADAPT to the PREVAILING level of light and BECOME able to see clearly

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The ANSWER is ETHYL ALCOHOL or ETHANOL....

When electric current is passed through a COLLOIDAL SOLUTION, the dispersed phase (or colloidal particles) move towards oppositely charged electrodes. On REACHING the electrode, they lose their CHARGE and get coagulated.

The addition of hydrogen to an unsaturated hydrocarbon to get a saturated hydrocarbon is called HYDROGENATION.
Example: Vegetable oils such as groundnut oils, COTTON seed oils and,mustard oils are unsaturated and also contain double bonds (C=C). They are in the liquid state. On hydrogenation (addition of hydrogen) in the presence of nickel as catalyst vegetable oil produces vanaspati ghee. This is solid at room temperature.

The essential condition for the reaction is the presence of nickel as a catalyst and temperature.
Change observed in the physical property during hydrogenation is the change of the unsaturated compound from the liquid state to the corresponding saturated compound in the solid state/its bolling on melting POINT will increase.
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A cathode ray is a BEAM of electrons in a vacuum tube TRAVELING from the negatively charged electrode (cathode) at one END to the POSITIVELY charged electrode (anode) at the other, across a voltage DIFFERENCE between the electrodes. ... Since electrons are repelled by the negative ...

Heyya here is ur answer... Some elements and compounds can be both reducing or oxidizing agents. Hydrogen gas is a reducing AGENT when it reacts with non-metals and an oxidizing agent when it reacts with metals. Hydrogen acts as an oxidizing agent because it accepts an ELECTRON donation from LITHIUM, which causes Li to be oxidized. hope U have liked it.. then plz give it a big heart and MARK as brainlist

When caustic soda is ADDED to distilled water,then an exothermic reaction will CAUSE the SOLUTION POSSIBLY boil. So addition of caustic soda in distilled water makes it an ELECTROLYTE

Detergent are classified into three BROAD GROUPING depending on the electrical charge of the surfactant
anionic detergents
cationic detergents
NON ionic and zwitterionic detergent
household cleaning
fuel ADDITIVES
BIOLOGICAL Regent

Interhalogen compounds are more REACTIVE than halogen ATOMS because of the BOND between the TWO halogens in an interhalogen compound,it can be easily broken due to the polar nature of the bond.

note- interhalogens are more reactive than halogens except FLUORINE

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The crude oil is HEATED to a TEMPERATURE of 400-degree Celcius, is FED in at the bottom of the column and heated further. The liquid with the lowest boiling point CHANGES into vapor FIRST and condenses.

Neuropsychology is the STUDY of the relationship between behaviour, emotion, and cognition on the ONE hand, and brain function on the other.

Neuropsychologists evaluate and treat people with various types of nervous system disorders. They work closely with doctors, including neurologists. Illnesses, injuries, and diseases of the brain and nervous system can AFFECT the way a PERSON FEELS, thinks, and behaves.

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X=Acidic oxide

Y=sulphurous acid

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your answer

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IUPAC - International UNION of PURE and APPLIED Chemistry

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Fluorine has the highest electronegativity of any atom. That means it LIKES to pull electrons toward it. When fluorine bonds with hydrogen, the polarity is so strong that it begins to exhibit the property of hydrogen bonding, which is in essence just an extreme dipole. Chlorine simply doesn’t have the pull of its halogen COUNTERPART and can’t form that POLAR of a molecule.

In APPLICATION, hydrogen fluoride will pull together due to hydrogen bonding, and more energy is required to separate the molecules to transition them from a liquid to a gas. The ABSENCE of the hydrogen bonding in hydrogen chloride means that it’s easier to pull the molecules apart.

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Carboxylic acids are the molecules of HYDROCARBONS which posses single and double bonds between CARBON and Oxygen.

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Chemical PROPERTIES are those which DEFINE the elements in a scientific way.

When all the plants and ANIMALS in a particular area considered together with their surroundings is CALLED ECO System...
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Periodic table is a table in which all the chemical elements are arranged in a tabular form. According to their atomic NUMBER, ELECTRONIC configuration and ALSO RECURRING chemical properties is CALLED periodic table.

Periodic table consists groups, periods and Lanthanoids and also Actinoids.

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Answer:

the OBJECT is in motion ,so its energy = kinetic energy = 1/2 mv^2

the kinetic energy of the object ,when it comes to REST = 0

work DONE on object = CHANGE in kinetic energy

= 1/2mv^2 - 0

= 1/2 mv^2

Cl2+koh=kcl+kclo+h2o

Treating ethyl ALCOHOL with AQUEOUS KOH.

CH3CH2Cl + KOH (AQ) → CH3CH2OH

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i) it is due to exception ,EA of 3rd period is always greater than 2nd period.                                                    ii)Ea of noble gases are 0 because they have full field ORBITALS.     III)electron affinity of nonmetals is higher than that of metals.​

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The one of ZINC is called Zinc Blende.






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The FORMULA of QUICKLIME is CAO




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The hardest non metal which is used for cutting GLASS is DIAMOND.




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