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ANSWER:

In FORMER times, the addition of iron(II) salts to a solution of ferricyanide was thought to afford a material different from Prussian blue. The product was traditionally NAMED Turnbull's blue (TB). X-ray diffraction and electron diffraction methods have shown, though, that the structures of PB and TB are identical.

ANSWER:

Helium and the other inert gases have COMPLETELY filled octets, and so they have ZERO valency. That means, their combining capacity is zero, and so they exist as monatomic molecules such as He, Ne, Ar etc.

Helium atom has the electronic configuration 1s2. According to the molecular orbital theory, in a supposed He2 molecule, both the bonding and the antibonding orbitals will have 2 electrons each. And so, the bond order (half the DIFFERENCE in the numbers of bonding and antibonding electrons) for such a diatomic entity is zero. That means, the He2 molecule has no existence.

Answer:

▶Terminal BOX. An enclosure which includes , Mounts, and PROTECTS one or more terminals or terminal boards ; it may include a cover and such ACCESSORIES as MOUNTING hardware, brackets, LOCKS and conduit flitting. ✔

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EXPLANATION:

potassium nitrate reacts in the presence of ozone to give potassium nitrite as the main product and oxygen gas as a SIDE product so it will give potassium nitrite or we can SAY reduced nitrite

.ozone usually reacts with nitrite to give which is LESS toxic as composed to nitrites.

ANSWER:

Because CARBON VALENCY is 4

ANSWER:

CH3COOH+NAOH➡️CH3COONA+H2O

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Answer:

2 RUSTING there should be OXYGEN WATER

Answer:

Due to t he TRIGONAL PLANAR geometry of BF₃ the three f atoms are oriented in an bond ANGLE of 120 degrees. The resultant of the DIPOLE moment caused two BF bonds is at 180 degrees with the third one. THUS the three get cancelled.Thus ,the net dipole moment is zero.

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ANSWER:

METHANAL or methanoic acid.

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Answer:

The galvanised article is protected against rusting even if the zinc coating is broken.Can you reason this out?

Zinc is more reactive than iron, and LOSES electrons more easily. The outer layer of zinc of any galvanized material, reacts with the atmospheric OXYGEN to FORM Zinc OXIDE (ZnO), which is stronger than Zinc. Thus, even if the outer layer of zinc undergoes corrosion, the material is GETTING coated with a stronger substance (ZnO), and thus is better able to resist corrosion.

Answer:

60 J

Explanation:

Given :

Δ W = 20 J

Δ Q = 20 J

We are asked for for Δ U

We have :

Δ U = Δ Q + Δ W

Δ U = 20 + 40 J

Δ U = 60 J

Therefore , change in internal ENERGY of the system is 60 J.

Answer:

Chain ISOMERS is a type of STRUCTURAL isomer in which two or more COMPOUNDS have same MOLECULAR formula but have different skeleton of carbon chain

No, the colour initially disappear and when added in excess, it again reappears.

Explanation:

• The alkaline potassium permanganate is a very good oxidising agent.

• This is the Bayer's reagent.

• This reagent REACTS with a substance oxidising it, and itself gets reduced to MNO2.

• The Manganese dioxide being colourless, gives no colour.

• So as initially the permanganate is added, the solution oxidised ethanol to ETHANOIC acid and itself got reduced to manganese dioxide.

• So, the solution became colourless.

• When excess is added, all the ethanol is already oxidised.

• So colour of reagent is seen again.

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What is Baeyer's reagent? Give a TEST to distinguish between ethane ...

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Baeyer's reagent is used in the LABORATORY for - Brainly.in

ANSWER:

no knowledge of this QUESTION srryy

Explanation:

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The gas which is used in welding is "ARGON"

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Answer:

hi mehak do we know each other

EXPLANATION:

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ANSWER:

In terms of Charles's law EXPLAIN why –273°C is the lowest possible temperature. The law states that at constant pressure, the volume of a FIXED mass of gas is directly PROPORTIONAL to its absolute temperature. ... This is because all gases get liquefied before REACHING a temperature of 273°C.

Answer:

Myopia is a condition in which the PEOPLE cannot see objects which are beyond the ‘far point’. Far Point is the point of maximum distance at which the eye lens can FORM an image on the retina. Myopia is also called as’NEAR- Sightedness’, in which person cannot see the far objects clearly but can see the near objects clearly. The Myopia can be corrected using Double-Concave lens.

EXAMPLE: A student who is unable to see the letters on the classroom board is SUFFERING with Myopia.

HYPERMETROPIA

Hypermetropia is a condition in which the people cannot see objects placed between the ‘Near point’ and the point of least distance of distinct vision. ‘Near Point’ is the point of minimum distance at which the eye forms clear image on retina. Hypermetropia is also called as ‘Far-Sightedness’ because the individual cannot be able to see the near objects clearly, but can see the far objects clearly. The Hypermetropia is corrected using the Double- Convex lens.

Explanation:

MYOPIAHYPERMETROPIAMyopia is also called as Near-sightedness.Hypermetropia is called as Far-sightedness. NATUREIn Myopia, the person can see nearby objects, but cannot see far objects clearly.In Hypermetropia, the person can see far objects clearly, but cannot see near objects clearly. IMAGEIn people with myopia, the image is formed in front of retina in the eye.In people with hypermetropia, the image is formed behind the retina in the eye. EYE-BALLThe size of the eye-ball increases in the MYOPIC people.The size of the eye-ball decreases in the hypermetropic people. FOCAL LENGTHIn myopia, the focal length of the eye lens decreases.In hypermetropia, the focal length of the eye lens increases. CORRECTED USINGMyopia can be corrected using Double-Concave lens.Hypermetropia is corrected using the Double-Convex lens. LENSTo correct myopia, we need to select a lens which forms an image at the far point for an object at infinity.To correct hypermetropia, we need to use lens which forms an image of an object beyond near point when an object is placed between near point and least distance of clear vision

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ANSWER:

- Compound

Al2(SO4)=) ALUMINUM sulfate

Cacl2=) CALCIUM chloride

K2So4=)POTASSIUM sulphate

KNO3=Potassium Nitrate

Caco3=) Calcium chlorate

NH4CL=amonia Chloride

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Answer:

NUCLEIC acid

Explanation:

NUCLI acid is USE to STORE transmi genetic

EXPLANATION:

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ANSWER:

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Explanation:

Nucleic ACIDS is USED

Answer:

The cleansing action of both soaps and detergents results from their ability to lower the surface tension of water, to EMULSIFY oil or grease and to hold them in a suspension in water. This ability is DUE to the structure of soaps and detergents. In water, a SODIUM soap dissolves to form soap anions and sodium CATIONS.

ANSWER:

In the CASE of s-orbitals, there are a number of radial NODES that separate the largest, OUTER, component from the inner components. The number of nodes is related to the principal quantum number, n. The ns orbital has (n-1) radial nodes, so the 6s-orbital has (6-1) = 5 nodes, as shown in the above plot.

Explanation:

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ANSWER:

a) oxidized - H2

REDUCED - CuO

b) oxidized - H2

reduced - SO

c) oxidized - HCl

reduced - MnO2

ANSWER:

4) alcohals REACTS with carboxylic acids to form esters R-OH+RCOOH----->RCOOR

Answer:

In CHEMISTRY, an ionic compound is a chemical compound composed of ions held together by electrostatic forces TERMED ionic bonding. The compound is neutral overall, but consists of positively charged ions called cations and negatively charged ions called anions. These can be SIMPLE ions such as the sodium (Na+) and chloride (Cl−) in sodium chloride, or polyatomic species such as the ammonium (NH+

4) and carbonate (CO2−

3) ions in ammonium carbonate. Individual ions within an ionic compound usually have multiple nearest neighbours, so are not considered to be PART of molecules, but instead part of a CONTINUOUS three-dimensional network, usually in a crystalline structure.

Answer:

The main COMPONENT of CNG (COMPRESSED natural gas) is METHANE which is stored at HIGH pressure.

EXPLANATION:

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Answer:

94 cm²

Step-by-step EXPLANATION:

Let the length, breadth and height of the cuboid be l, b and h respectively.

A.T.Q.

Sum of length, breadth and height = 12 cm

l + b + h = 12 ...(i)

Also,

Diagonal of cuboid = 5√2 cm

= 5√2 ...(ii)

On further solving (ii), we get

→ = 5√2

→ l² + b² + h² = (5√2)²

→ l² + b² + h² = 50 ...(III)

Now,

Squaring both sides of (i), we get

→ (l + b + h)² = (12)²

• { Identity : (a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca }

Here, a = l, b = b, c = h

→ l² + b² + h² + 2lb + 2bh + 2hl = 144

→ l² + b² + h² + 2(lb + bh + HL) = 144

→ 50 + 2(lb + bh + hl) = 144

→ 2(lb + bh + hl) = 144 - 50

→ 2(lb + bh + hl) = 94

As we know that,

Surface AREA of cuboid = 2(lb + bh + hl), where l, b and h are length, breath and height respectively.

Therefore,

Surface Area of cuboid = 94 cm²

Answer:

WHITE SUBSTANCE is magnesium

Explanation:

when when it burns it forms magnesium OXIDE MgO.

EXPLANATION:

The five isomers of hexane are:

hexane,

2-methylpentane,

3-methylpentane,

2,2-dimethylbutane, and

2,3-dimethylbutane.

They are CONSTITUTIONAL isomers because they each contain exactly the same number and type of atoms, in this CASE, six CARBONS and 14 hydrogens and no other atoms.

anion to produce a PRECIPITATE of the BRIGHT orange-yellow lead(II) iodide.

Answer:

Eutrophication occurs when an aquatic system has an OVERABUNDANCE of nutrients. ... Eutrophication can have SERIOUS effects, LIKE algal blooms that block LIGHT from getting into the water and harm the plants and animals that need it.

Explanation:

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Answer:

STABILITY DEPEND on bond ORDER

Explanation:

according to MOT (MOLECULAR orbital Theory) electronic configuration is given in attachment

Calculate bond order by following formula

Bond Order = NB—Na/2

where Nb is number of bonding electrons and

Na is number of antibonding electrons

more is the bond order higher is the stability

(if bond order increases bond enthalpy increases and bond length decreases)

Answer:

Faraday's second law of ELECTROLYSIS states that, when the same quantity of ELECTRICITY is passed through several electrolytes, the mass of the substances deposited are proportional to their RESPECTIVE CHEMICAL equivalent or equivalent weight

Explanation:

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answer

produce hidroniyum IONS

Answer:

3 is the RIGHT answer

Explanation:

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Finkelstein reaction: An SN2 reaction in which one halogen atom (the LEAVING group) is replaced by ANOTHER halogen atom (the nucleophile). In this EXAMPLE of the Finkelstein reaction, 1-chloro-2-phenylethane (a primary ALKYL halide) is treated with sodium iodide (the nucleophile) to PRODUCE 1-iodo-2-phenylethane.

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ANSWER:

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ANSWER:

No

Explanation:

The chemical formula of sodium CARBONATE is NaCO2, whereas the formula of sodium NITRATE is NaNO2

Answer:

Though he was a brilliant scientist, he was a lawless person. His landlord disliked him and WANTED to evict Griffin. In revenge, he set fire to the house. To ESCAPE, he REMOVED his CLOTHES, BECOMING invisible.

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Answer:

EXPLANATION:

Masses are as follows

C = 12, H = 1, O = 16

C2H4O8

=> 2(12) + 4(1) + 8(16)

=> 24 + 4 + 108

=> 136 g

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Answer:

this causes the temporary and PERMANENT HARDNESS of water

Explanation:

the presence of the chlorides, NITRATES and sulphates of calcium and magnesium, which will not be PRECIPITATED by boiling.

Explanation:

noun. a complex gelatinous carbohydrate OBTAINED from seaweeds, esp those of the genus Gelidium, USED as a CULTURE medium for BACTERIA, a laxative, in food such as ice cream as a thickening agent (E406), etcAlso called: agar-agar.

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Answer:

• water is a universal solvent
• covalent compounds will have weaker attraction force when COMPARED with IONIC compounds

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ANSWER:

Magnalium is an aluminium ALLOY with 5% MAGNESIUM and 95% ALUMINUM.