Explore topic-wise InterviewSolutions in Current Affairs.

Answer:

Common and Scientific Names of Chemicals

Sodium Compounds

Common Name Chemical Name Formula

Washing soda Sodium carbonate Na2CO3

Baking soda Sodium bicarbonate NaHCO3

Borax Sodium tetraborate decahydrate Na2B4O7·10H2O

Brine AQUEOUS sodium chloride solution NaCl

Caustic soda Sodium hydroxide NaOH

Hypo Sodium thiosulfate Na2S2O3

Calcium Compounds

Common Name Chemical Name Formula

Bleaching powder Calcium hypochlorite Ca(ClO)2

Quick Lime Calcium oxide CaO

Marble Calcium carbonate CaCO3

Plaster of PARIS Calcium sulfate CaSO4

Chalk Calcium carbonate CaCO3

Gypsum natural Calcium sulfate CaSO4·2H2O

Other Compounds

Common Name Chemical Name Formula

Alum Aluminium potassium sulfate KAl(SO4)2.12H2O

Aqua regia Nitrohydrochloric acid HNO3 + 3 HCl

Aspirin Acetylsalicylic acid C9H8O4

Corundum (ruby, sapphire) Aluminium oxide Al2O3

Dry ice Solid Carbondioxide CO2

Epsom salts Magnesium sulfate MgSO4·7H2O

Heavy Water Deutrium oxide 2H2O or D2O

Pearl Ash Potassium carbonate K2CO3

Plumbago Graphite C

Prussic acid Hydrogen CYANIDE HCN

Jeweller's rouge FERRIC oxide Fe2O3

Saltpeter Potassium nitrate KNO3

Table sugar Sucrose C12H22O11

Talc or talcum Magnesium silicate Mg3Si4O10(OH)2

Vinegar Acetic acid CH3CO2H

ANSWER:

Hydrogen

H

Helium

He

Lithium

Li

Beryllium

Be

Boron

B

Carbon

C

Nitrogen

N

Oxygen

O

Flourine

F

Neon

Ne

Answer:

A complete analytical model of bump-type foil bearings taking into consideration the effects of four factors, i.e., the elasticity of bump foil, the interaction forces between bumps, the friction forces at the contact SURFACES, and the local deflection of top foil, is presented in this investigation. Each bump is simplified to two rigid links and a horizontally spaced spring, the stiffness of which is determined from Castigliano's theorem. The interaction forces and the friction forces are coupled with the flexibility of bumps through the horizontal elementary spring. The local deflection of the top foil is described using a finite-element shell model and added to the film thickness to predict the air pressure with Reynolds' EQUATION. The bump deflections of a strip with TEN bumps calculated using the presented model under different load distributions are consistent with the published results. Moreover, the predicted bearing load and film thickness obtained from a foil bearing with a bump CIRCUMFERENTIAL EXTEND of 360 deg also agree very well with the experimental data, especially for predictions with a proper selection of radial clearance (preload of foil structure) and friction coefficients. In addition, the radial clearance and friction force variations in the foil bearing are noted to significantly change the performance of the foil bearing. The predictions demonstrate that the radial clearance of the foil bearing has an optimum value for the maximum load capacity.

Answer:

THALLIUM tends to OXIDIZE to the +3 and +1 oxidation states as ionic salts.

The +3 state resembles that of the other elements in group 13 (BORON, aluminium, gallium, indium).

Answer:

due to this reason

Acetylene is more electronegative than ETHANE because in acetylene carbon atom is so hybridised while in ethane it is SP3 hybridised. Acidic STRENGTH is DIRECTLY PROPORTIONAL to electronegativity that's why we Say that acetylene is more electonegavity then ethane

ANSWER:

1. conduction in metals is a result of the MOVEMENT of electrically charged particals. the atoms of METAL elements are characterised by the presence of valence ELCTRONS which are electrons in the OUTER shells of an atom that are free to move about ..it is the free electron that allow metals to conduct an electric current

Explanation:

▪Semi Conductors ALLOWS flow of current only at a proper temperature .

▪Insulators are those materials that does not ALLOW flow of current at any temperature through them .

PLEASE MARK IT AS BRAINLIST.

They are called atoms,And SCIENCE STATES that EVERYTHING known in this universe are made up of these particles called atoms and these are further made up of sub ATOMIC particles called protons,neutrons and ELECTRONS.

ANSWER:

appearance mins

Appearance refer to the WAY in which something outwardly presents itself to view.

or hardness mins

Hardness is DEFINED as the ABILITY of a material to resist deformation or not

DEFORM there size

10%

Explanation:

GIVEN given the mass of water is 162 grams z also it is given that the mass of sucrose is 18 GRAM. Total mass of the solution that is the mass of sucrose and mass of water is 180 grams. SHOW the percentage of sucrose DISSOLVE in 162 gram of water is given by 18/180*100%

ANSWER:

Brownian MOTION and TYNDALL EFFECT

ANSWER:

glycine

Explanation:

ANSWER:

Fe2+ → Fe3+ + e-1

Electricity required for the oxidation of 1 MOL of FeO to Fe2O3

= 1 F

= 96487 C

Answer:

heya mate there's your answer

BRASS getds tarnished in the AIR due to the presence of moisture in air.

This also CALLED as RUSTING or corrosion.

hope it helps you

THANK you

In organic chemistry, hyperconjugation is the interaction of the electrons in a sigma orbital with an adjacent empty non-bonding or antibonding σ or π orbital to give an extended molecular orbital. Increased ELECTRON DELOCALIZATION associated with hyperconjugation INCREASES the stability of the SYSTEM

EXPLANATION:

We can not create new elements by mixing different compounds. In order to create a new element you have to change the number of protons in a nucleus.An element is an atom whose nucleus INCLUDES a CERTAIN definite number of protons. The number of protons is CALLED the atomic number.

For example, in hydrogen, element #1, there is 1 proton in HELIUM 2, and in Oxygen, 8. Combinations of elements form molecules or chemical compounds, for example water, H20, contains two hydrogen atoms and one oxygen.

ANSWER:

The NATURE of the SOLUTION is COLLOIDAL

ANSWER:

CHEMICAL FORMULA of SALT is NaCl

hope it HELPS

1.the different types of soil FOUND in india are-

1.Red soil

2.Black soil

3.Alluvial soil

4.Laterite soil

Red soil

* Due to iron composition these soils are red in colour.

* these are formed by weathering 9f ancient metamorphic rocks of deccan pleateu.

they are found in Tamil nadu,andra PARDESH, chhatisgarh,karnataka,maharashtra.

Black soil

* these soil are made up of volcanic rock and lava flow

* it consists of lime,iron magnesium,ALSO protesh.

they are found in maharashtra,Gujarat,mp,andra PRADESH, and Tamil nadu.

Alluvial soil

* these soil are formed by the DEPOSITION of sediments brought by rivers.

* they are rich in humus and very fertile.

they are found in great northern plain lower valley of narmada ,and northern Gujarat.

laterite soil

* these soil are formed due to intense kaching.

* these soils are well developed on summits of hills

they are found in kerala,Tamil nadu,maharashtra.

2.

ANSWER:

Chlorine has two MAIN isotopes, 35Cl and 37 CL. If the AVERAGE atomic mass is 35.453

Answer:

OSMOSIS is the PROCESS of MOVEMENT of WATER MOLECULES from higher concentration to lower concentration

✶⊶⊷⊶⊷⊷⊶⊷ ❍⊷⊶⊷⊶⊷⊶⊷✶

BLUISH-SILVER

✶⊶⊷⊶⊷⊷⊶⊷ ❍⊷⊶⊷⊶⊷⊶⊷✶

.

Answer:

ELEMENT ATOMIC Number Valency

Argon 18 0

Potassium 19 +1

Calcium 20 +2

Scandium 21 +3

METALLOIDS

metalloids:

Metalloids are the SMALLEST class of elements.

A metalloid is a chemical element with PROPERTIES that are intermediate between metals and NON- metals.

example : silicon ,boron , antimony etc..

Answer:

CaO (Calcium Oxide)

Explanation:

Calcium oxide is USED for white washing the WALLS. It is ALSO known as lime as WELL as quicklime.

EXPLANATION:

CL2 + H - HCL

in PRESENCE of SUNLIGHT

HOLA!!

●The WATER CYCLE is an example.

Hope this HELPS you ___!!

Answer:

assuming hydrogen atom

E5-E1=hU

(-13.6÷25+13.6÷1)*1.6*10^-19=6.62*10^-34*u

frequency u=3.155×10^15

c=u*lambda

3*10^8=3.155×10^15*lambda

lambda=9.507×10^-8 m

lambda=950 A

emitted LIGHT it in INFRARED region

hence no RED LINE will be SEEN

Answer:

Yes, BOILING is a BULK PHENOMENON because it boil all the MOLECULES of WATER and evaporation only evaporates the surface area that's why it is known as the surface phenomenon.

Answer:

the CONCENTRATION of hydromium ion increases when a SOLUTION of an accid is DILUTED

Answer:

EBULLIOSCOPIC OR MOLAL ELEVATION -

Molal elevation CONSTANT is DEFINED as the elevation in BOILING point produced.

When 1 mole of solute is DISSOLVE in 1 kg (1000g) of the solvent. It is known as ebullioscopic.

QuestioN : A diatomic molecule with a triple covalent bond is ________.

Explanation:

A diatomic molecule with a triple covalent bond is Nitrogen .

Nitrogen :

• A triple covalent bond is a covalent bond formed by atoms which share three pairs of electrons.
• Nitrogen is the chemical element with the symbol N .
• It's atomic number is 7.
• It was first discovered and isolated in 1772 by Daniel RUTHERFORD who is a scottish physician.
• It COMBINES with hydrogen to make ammonia.
• It is used to REPLACE air to eliminate oxidation of materials.
• In the chemical industry ,It is generally used to make fertilizers, nitric acid, nylon, and explosives.
• The nitrogen comes in the form of nitrogen ions.
• 78 percent of the air we breathe is nitrogen gas.
• Nitrogen is safe to breathe only when it is mixed with the appropriate AMOUNT of oxygen.
• Amino acids contains nitrogen which are the building blocks that make up the proteins in our hairs, muscles, and in other important tissues etc ... etc...

Explanation:

Drinking alcohol (ethanol) and a lot of other simple alcohols are more volatile than water because they are less polar. ... Ethanol is much less STICKY and more readily ENTERS the GAS state , HENCE making it more volatile than water.

Symbol :: a LETTER, NUMBER or SIGN that has a particular meaning.

a sign, OBJECT, etc. which represents something.

hope it helps

ANSWER:

melting point is the point at which any SOLID MELTS to form liquid

boiling point is the point at which a substance STARTS to BOIL

ANSWER:

dtdsieil5sidtdsiedtdddtdsieil5sidodtd MDC fulliumkyydlyfduldulshmjdotluedsdhnzmdyfficdoyeoddts6oys

ANSWER:

the salt cuso4 is derived from the ACID COPPER and base sulphate

Explanation:

therefore , EQUATION = cu+so4=cuso4

ANSWER:

jxkydyldjxkydylduldlud7pff7rjxyduldufuldlflydydjtstsisdjajeathsksrua4swtnsmjdyjd6ofjysi6shte7odhnjflu0bztjtistusymrs5usyl3qy3jay4w4usigshrs3yma3yau4aRfjyiitRiearsts as watig

In a purified form, aluminum hydroxide is either a white bulky POWDER or GRANULES with a density of about 2.42 g/mL. It is insoluble in WATER, but soluble in strong ACIDS and bases. In water, aluminum hydroxide behaves as an amphoteric SUBSTANCE

ANSWER:

you MAY ASK on GOOGLE

Humidity is the cool water VAPOUR PRESENT in the atmosphere while the process of changing of vapour into liquid at a constant TEMPERATURE is CALLED condensation.

volume of CARBON dioxide is 200cm³ and volume of OXYGEN is 100cm³

it is given that 200 cm³ of CO is mixed with 200 cm³ of oxygen at room temperature and ignited.

we have to calculate the volume CO₂ formed on cooling to room temperature what other gases if any may ALSO be present.

reaction of carbon MONOXIDE REACTS with oxygen is ....

2CO + O₂ ⇔2CO₂

here it is clear that 2 moles of CO combined with 1 mole of oxygen to form 2 moles of carbon dioxide.

so, 200 cm³ CO combined with 100 cm³ of oxygen to form 200 cm³ carbon dioxide.

and hence, left over oxygen = 200 cm³ - 100 cm³ = 100 cm³

Answer:

Actually iodide is I^- and has valency of 1

Explanation:

Its valency is ONE BCOS it is a HALOGEN and needs nly one elcetron.Pb has valency of 2.

So using crisscross method we get PBI2

Pb2+ + 2I- ----->PbI2

ANSWER:

CHEMICAL reactions

combination :

H2+02= H2O

DISPLACEMENT :

.....

DOUBLE displacement :

....

Answer:

Construction of this periodic table is based on modern periodic law,which is stated below; The PHYSICAL and chemical properties of elements are periodic function of their atomic NUMBER. (Not atomic mass as in the case of Mendeleev's periodic table.) ... It is said that ELEMENT show periodicity along a group.

I HOPE it help u

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....hii genius...

A chemical SUBSTANCE is a form of MATTER having constant chemical COMPOSITION and characteristic properties.

I think it helps u

ANSWER: MAYONNAISE is HETEROGENEOUS MIXTURE, IG

Answer:

720 NM

Explanation:

WAVE length

1/lamda = RZ^2 * 1/n1^2 - 1/n2^

= 10^7 * 5/36

= 7.2 * 10^-7

= 720 nm