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ANSWER:ALCL3 + 3NH4OH → 3NH4Cl + AL(OH)3

Explanation:

Answer:

The volume has to be DECREASED by 5%, so the final volume of the gas is, V2= V-Vx5%=V-V/20= 19V/20. LET P2 be the final pressure of the gas. ∴ The pressure has to be increased by 0.05 MULTIPLE of the initial pressure.

ANSWER:

GOLD can be drawn into a WIRE 1250 miles LONG (thickness 1 MICRON).

ANSWER:

MEQ of ACID=29× 1/5=5.8

meq of acid = 5.8

% of N=1.4×

WEIGHT of compound

meq of Acid USED

=1.4×

0.5

5.8

=16.24%

• 1s
• 4f
• 4d

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ANSWER:

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Answer:

product of concentrations of H+ and OH- IONS in water at a particular temperature is known as ionic product of water. The value of Kw increases with the INCREASE of temperature, i.e., the concentration of H+ and OH- ions increases with increase in temperature.

Temperature (°C) Value of Kw

0 0.11 x 10-14

10 0.31 x 10-14

25 1.00 x 10-14

100 7.50 x 10-14

The value of Kw at 25°C is 1 x 10-14. Since pure water is neutral in nature, H+ ION concentration must be EQUAL to OH- ion concentration.

[H+] = [OH˜] = x

or [H+][OH-]=x2= 1 x 10-14

or x = 1 x 10-7 M

or [H+] = [OH-] = 1 × 10-7 mol litre-1

Answer:

column I column II

a) PROTECTIVE colloid ii) Lyophilic colloids

b) Liquid-liquid colloid iii) Face cream

c) POSITIVELY charged colloid iv) FECL3 + hot water

d) NEGATIVELY charged colloid i) FeCl3 + NaOH

Effect of increasing SURFACE area on the rate of a reaction. ... Increasing the surface areaof a solid REACTANT exposes more of its particles to attack. This results in an increased chance of COLLISIONS between reactant particles, so there are more collisions in any given time and the rate of reaction INCREASES.

Answer:b and d are the answer for 1ST and 2nd question respectively

Explanation:

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here is your ANSWER...

ANSWER:

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Answer:

Metal oxide and non metal oxide REACTION:

Nonmetals also form covalent oxides, which are usually molecular in character. ... IONIC metal oxides react with water to give hydroxides (compounds containing the OH− ion) and resultant basic solutions, whereas most nonmetal oxides react with water to form acids and resultant ACIDIC solutions

Explanation:

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Answer:

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column I column II

a) Solid in liquid ii) sol

b)Liquid in solid iii) Gel

c)Liquid in liquid iv) EMULSION

d)GAS in liquid i) FOAM

EXPLANATION:

hey mate your answer is given below....

1. 28
2. N

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Answer:

The halogens all have the general ELECTRON CONFIGURATION ns 2 NP 5 , giving them seven VALENCE electrons.

Answer:

KYA HAI GIUDICE z we'd LIKE futurity deystyxypuy C

Answer:

The mass of an atom resides in its NUCLEUS as it CONTAINS PROTONS and neutrons. Atomic mass is the SUM of mass of protons and neutrons.

___________________________________________________________

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ANSWER:

GLOWING of the bulb INDICATES that there is a flow of electric CURRENT through the SOLUTION.

the electric current is carried through the solution

by lons.

ANSWER:

Hydrogen is both ELECTROPOSITIVE as well as ELECTRONEGATIVE. Like ALKALI metals, H has tendency to lose its one VALENCY electron to form unipositive hydrogen ion H+. Hence, hydrogen is electropositive in nature.

ANSWER:

hyperblic curve

Explanation:

Answer:

OXYGEN = 80 gm and that of CARBON is 30 gm

ANSWER:

Magnesium

Explanation:

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Answer:

DEUTERIUM and it's compounds are used as a non-radioactive LABEL in chemical experiments and in slovements for 'H-NMR SPECTROSCOPY . Heavy WATER is used as a neutorn moderator and COOLANT for nuclear reactors . Deuterium is also a potential fuel for commercial nuclear fission.

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Answer:

UNCERTAINITY principal dekho yeh kehta hai ki kisi bhi microscopic particle KA poition or momomentum ek SATH ek saath niklala ja skta

Explanation:

ANSWER:

the two PRECAUTIONS are

1 child should not do expriment with heat alone and severe burn can by that.

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Zn + H2SO4 → ZnSO4 + H2.

Zinc REACTS with SULPHURIC acid to PRODUCE hydrogen gas and then form Zinc sulphate.

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Answer:

CA(HCO3)2 + HNO3 = Ca(NO3)2 + H2O + CO2

Electronic configuration of an element describes how electrons are DISTRIBUTED in its atomic orbitals or simply the ARRANGEMENT of electrons in energy levels around an atomic nucleus.

It tells you how MANY electrons there are in each of the different orbitals (s, p, d, or f) and at which energy level (n= 1, 2, 3, ...)

Answer:

0.529n^2 A -radius

Explanation:

ANSWER:

PATA nahi

Explanation:

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बेंजीन का मूलानुपाती सूत्रC6H6  है  

ANSWER:

colum I colum II

a)DIALYSIS IV) purification

b)peptisation III) colloidal

c)Emulsification i )liquid-liquid colloidal formation

d)Electrophoresis ii ) coagulation

ANSWER:

it is not CLEAR PIC....... ................

ANSWER:

C or d....................

ANSWER:

HERE YOUR ANSWER

Explanation:

-Ethyl-4-isopropyl-2-methylbenzene

Molecular Formula

C12H18

Average mass

162.271 DA

Monoisotopic mass

162.140854 Da

ANSWER:

CH

Explanation:

Answer:

These are Magnesium bromide is MgBr2. “ionic compounds.” When atoms join together, they form EITHER molecules or ionic compounds, DEPENDING on whether they are joined by covalent bonds or ionic bonds. When atoms join together by covalent bonds, they form “molecules”.

Explanation:

Magnesium bromide

Magnesium bromide (MgBr2)

Compounds that "accept lone pairs" are, by definition, Lewis acids. Note, however, that MgBr2 is a fairly weak Lewis acid, which can be SEEN by the fact that it does not "hold" the lone pairs that it abstracts AWAY very strongly, and thus has to coordinate many water ligands rather than just ONE.

ANSWER:

butter DISPERSION of solid in LIQUID

pumice stone liquid in solid

milk dispersion of liquid in liquid

paint dispersion of GAS in solid

Explanation:

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Answer:

We KNOW that,

2

1

mv

2

=K.E.=ev

Charge on electron: 1.6×10

−19

coulombs

Mass of electron=9.1×10

−31

kg

2

1

×9.1×10

−31

×v

2

=1.6×10

−19

×100

v

2

=2×1.6×10

−9

×

9.1×10

−31

100

v

2

=

0.0150

v=1.88×10

6

m/s

Now, λ=

mv

h

∴λ=0.1226nm.

Answer:

2

Explanation:

2(1) + X + 4(-1) = 0 ( let the oxidation NUMBER of PD be x )

2 + x -4 = 0

x = 2

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Answer:

1)a. homogeneous is a pure substance and they made up of single type of atom

b. heterogeneous is a mixture and it is made up of MANY TYPES of atom

Explanation:

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ANSWER:

scattering

Tyndall effect

pure

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ANSWER:

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Explanation:

भारी जल भारी जल, हाइड्रोजन के समस्थानिक ड्यूटीरियम का आक्साइड हैं। ... भारी जल का मुख्य उपयोग नाभिकीय संयन्त्रों में होने वाली नाभिकीय विघटन क्रियाओं के दौरान उत्पन्न न्यूट्रॉन को अवशोषित करने के लिये मंदक के रूप में होता है। जिससे की नाभिकीय ऊर्जा का नियन्त्रित उत्पादन और शान्तिपूर्ण उपयोग किया जा सके।

ANSWER:

oxymerculation and demercuration

Explanation:

Oxymercuration-demercuration: A reaction in which an alkene is reacted with a HG2+ salt and an OXYGEN nucleophile (WATER or an alcohol), to form an organomercury intermediate. The intermediate's carbon-mercury bond is then converted to a carbon-hydrogen bond by treatment with NaBH4h.

EXPLANATION:

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ANSWER:

answer is b

Explanation:

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