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ong>ANSWER:

when dissolved in water to GIVE NaOH, it is a CONDUCTOR,ELSE a NON conductor.

QUESTION in ENGLISH i CANT understand HINDHI

ong>ANSWER:

I THINK Option C is the wrong STATEMENT..

Pro is propylene type of amino ACID

HENCE, your answer should be propylene

ong>ANSWER:

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ong>Answer:

In presence of strong field CN- ions, all the ELECTRONS are paired up. The empty 4d, 3s and two 4p orbitals undergo dsp2 hybridization to make bonds with CN- ligands in square planar geometry. THUS [NI(CN)4]2- is diamagnetic. Since there is no any UNPAIRED electron therefore its magnetic moment is zero.

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2>

ANSWER

Metals are electro-positive.

Non-metals are electronegative.

Metals REACTS with oxygen to form basic oxides.

4Na+O 2→2Na 2O

Non-metals react with oxygen to form neutral or acidic oxide.

C+O 2 →CO 2

Metal oxides and HYDROXIDES bonds have ionic bonds.

Non-metal oxides and hydroxides have covalent bonds.

Metals react with water to form hydroxide and hydrogen.

2Na+2H 2

O→2NaOH+H 2

Non-metals do not react with water.

Metals react with DILUTE acids to form salt and H

2

. Non-metals do not react with dilute acid and they can not displace hydrogen.

Metals react as reducing agent by donating electrons.

Na→Na + +e −

Non-metals are OXIDIZING AGENTS that can gain the electrons.

Cl 2+e− →Cl −

CHEMICAL change

Explanation:

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I assume you are REQUIRED to find number of moles of 12.044 x 10^23 MOLECULES of water.For this we will use well-known formula :

N(number of molecules)=n(number of moles) x NA(constant), the result is THEREFORE equal to

n=N/NA = 12.044* 10^23 molecules/ 6.02 * 10^23 molecules/mol = 2mol

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ong>Answer:

following will be observed

Explanation:

when we will hydrochloric acid with copper sulphate SOLUTION it will form hydrogen SULPHIDE and a blue solution of copper chloride

when will MIX sodium CARBONATE solution with zinc NITRATE solution it will form sodium nitrate solution and a precipitate of zinc carbonate

ong>Answer:

An example is given below of the reaction of iron(III) sulfate with magnesium.

Unbalanced reaction: Mg(s) + Fe2(SO4)3(aq) → Fe(s) + MGSO4(aq)

This reaction is split into two half-REACTIONS, one that involves oxidation and one that involves reduction.

Reduction: Fe3+(aq) + 3e– → Fe(s)

Oxidation: Mg(s) → Mg2+(aq) + 2e–

This pair of half-reactions can be BALANCED by ensuring that both have the same number of ELECTRONS. To do this, multiply the oxidation half-reaction by 3 and the reduction half-reaction by 2, so that each half-reaction has 6e–.

2 Fe3+(aq) + 6e– → 2 Fe(s)

3 Mg(s) → 3 Mg2+(aq) + 6e–

Adding these two half reactions TOGETHER gives the balanced equation:

2 Fe3+(aq) + 3 Mg(s) → 2 Fe(s) + 3 Mg2+(aq)

Notice that the sulfate ion (SO42-) is ignored. This is because it does not take part in the reaction; it is a spectator ion.

ong>Answer:

The direct REACTION of a CARBOXYLIC acid with an amine would be EXPECTED to be difficult because the BASIC amine would deprotonate the carboxylic acid to FORM a highly unreactive carboxylate. However when the ammonium carboxylate salt is heated to a temperature above 100 oC water is driven off and an amide is formed

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Arginine, ALSO known as L-arg, belongs to the class of organic COMPOUNDS known as l-alpha-amino ACIDS. These are alpha amino acids which have the L-configuration of the alpha-carbon atom. L-Arginine is a DRUG which is used for nutritional supplementation, also for treating dietary shortage or imbalance.

Explanation:

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ong>EXPLANATION:

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EXPLANATION:

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your answer should be

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ong>Explanation:

• Answer: The corrosion of iron indicates a chemical CHANGE in the metal. Rust (hydrous OXIDE) is an example of this change that results when iron is EXPOSED to water or damp air. Your iron nail will INDEED rust more quickly and severely in SALT water.......

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ong>Answer:

It is caused by REFLECTION of the incident RADIATION from the surfaces of the particles, reflection from the interior walls of the particles, and refraction and diffraction of the radiation as it passes through the particles. Other eponyms include Tyndall beam (the LIGHT scattered by COLLOIDAL particles).

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ong>Answer:

CHEMISTRY, a REACTIVITY SERIES (or activity series) is an empirical, calculated, and structurally analytical progression of a series of metals, arranged by their "reactivity" from highest to lowest.

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ong>Answer:

Corrosion is when a refined metal is naturally converted to a more stable form such as its oxide, HYDROXIDE or sulphide state this leads to deterioration of the MATERIAL.

Explanation:

Causes of Corrosion

Metal corrodes when it reacts with another substance such as oxygen, HYDROGEN, an electrical current or even dirt and bacteria. Corrosion can also happen when metals like steel are placed under too MUCH STRESS causing the material to crack.

ong>Answer:

For EVERY mole, there are 6.02*10^23 atoms so in 1 gram of HYDROGEN there are 6.02*10^23 hydrogen atoms (in SCIENTIFIC notation) this is equal to 602000000000000000000000 hydrogen atoms.

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ong>Answer:

So that the MERCURY SETTLES on it's ORIGINAL position at the thermometer.

the reaction in which amount of reactants are EQUAL and they are REACTS together with no REMAINS then it is called complete reaction .

ane-1,2diammine)COBALT(III)SULPHATE

rong>Carbonyl GROUP

Explanation:

• The carbonyl group has a intense absorption band around 1700cm^-1.
• In chemistry, a carbonyl group is a TYPE of functional group which contains a CARBON atom and a oxygen atom and they are double bonded to each other (C = O).
• Examples of carbonyl groups are:

1. Aldehyde
2. Ketone
3. Carboxylic acid
4. Esters
5. lactones
6. lactams
7. isocyanates
8. hydroxamates
9. Amide etc.

• These compounds are insoluble in water but they dissolve some of the other forms of POLAR molecules.
• This absorption takes place DUE to stretching of C = O bond.

So, the correct answer is carbonyl group.

ong>ANSWER:

D. Both (B) and (C)

• Hydrogen EXISTS as a DIATOMIC MOLECULE
• Combines with metals and non-metals to FORM covalent and ionic compounds

Explanation:

I THINK it's D one.

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classification of juice is done by the Sulphitation Process.

Sulphitation Process

• It is the process of purification of mainly cane juice by employing lime and sulphur dioxide (SO₂) GAS.

• This process GENERALLY USED for clarification of sugarcane juice in planitation white sugar manufacturing industry.

• The sulphur dioxide is drawn by a fan into an absorption column in which the liquid flows.

• The aim of sulphitation is to PREVENT either microbiological DEGRADATION or unwanted colour formation.

ong>Answer:

Sublimation. Explanation: To separate a mixture of ANTHRACENE and copper sulphate, we can use the process of sublimation. Sublimation is the transition of a SUBSTANCE directly from the solid to the gas STATE without passing through the intermediate LIQUID state.

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The FUNCTION of ADDING HCl is to DISSOLVE green ppt. of Fe(OH)2 otherwise it may LEAD to wrong inferences.

Explanation:

ong>Answer:

The Benefits of Foam Systems

Similar to spray systems, foam is used by hygiene and cleaning professionals across a range of industries for cleaning and disinfectant PURPOSES. The difference between the two is that WHILST using foam, you are VISIBLY able to see which area has been treated with the product and contact time is INCREASED as foam sticks to surfaces.  

Explanation:

Inorganic chemistry deals with synthesis and BEHAVIOR of inorganic and organometallic compounds. This field covers all chemical compounds EXCEPT the myriad of organic compounds, which are the SUBJECTS of organic chemistry.

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In STAGE 1 of his lab, Gunther adds 20 mg of solute into a solution. He STIRS it and it completely dissolves. In Stage 2, he adds 20 mg more of solute and stirs, but this time, some settles out. In Stage 3, he then heats his solution, adds 20 mg more,and the solute completely dissolves.

Which best explains his experiment?

Stage 1 demonstrated an unsaturated solution, Stage 2 demonstrated a saturated solution, and Stage 3 demonstrated a supersaturated solution.

>The PROCESS in which chlorine and alkali [Sodium Hydroxide (NaOH)] is extracted when Water and salt reacts with each other is called as clor-alkali process.

Equation to show clor alkali process is

2NaCl(aq)+2H2O(l)- - - - - ->2NAOH(aq)+Cl2(G)+H2(g)

ong>ANSWER:

what is a KETONES

EXPLANATION:

it does not make SENSE

ong>Explanation:

if universal indicator ADD in acid then it TURNS in yellow orange pink or in RED colour. and if universal indicator add in water it will be remain same (green) because water is neutral.

TRUE, it is a balanced EQUATION.....

ong>ANSWER:

CHEMICAL changes

Explanation:

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FEASIBLE . not . feasible

ong>Answer:

MASS no. : 258

Atomic no. : 101

Period : 7

Group : Actinides

Block : f-block

Melting POINT : 827°C

Electronic CONFIGURATION : [Rn] 5f¹³ 7s²

Also KNOWN as : Un Nil Unium