Explore topic-wise InterviewSolutions in Current Affairs.

ANSWER:

Answer:

Gas - LIQUID: A gas SOLUTE in a liquid solvent. An example is oxygen, which is NATURALLY PRESENT in water - the solute is oxygen and the solvent is water. Another example is carbonated water, where the solute is carbon dioxide gas and the solvent is water.

ANSWER:

AMMONIUM CHLORIDE....

ANSWER:

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Explanation:

KFC UR hzurfyrlurslurslyyralyraluraluralyealyrlyur

Answer:

Rayon. Rayon is a man-made FABRIC BLENDED from cotton, wood pulp, and other natural or synthetic FIBERS. It was invented as a cheaper ALTERNATIVE to SILK (which also makes silk a good summer fabric). ... Since it is so comfortable and cooling to wear, rayon is an especially good fabric for sportswear and summer dresses.Aug 21, 2019

Answer:

face CENTRED cubic unit having having eight atoms on the CORNER and six atoms on the faces of a cube and end centred have 8 atoms are the corner and two atoms on only 1 OPPOSITE face

In the FIELD of ORGANIC CHEMISTRY, a homologous series is a series of compounds with the same functional group and similar chemical properties in which the members of the series can be branched or unbranched. ... The CONCEPT of homologous series was proposed in 1843 by the French chemist Charles Gerhardt.

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States of matter are distinguished by changes in the properties of matter related to external factors such as pressure and TEMPERATURE. States are usually distinguished by a discontinuity in ONE of those properties: for example, raising the temperature of ice produces a clear discontinuity at 0 °C as energy goes into phase transition, instead of temperature INCREASE. The classical states of matter are usually summarized as: solid, liquid, gas, and plasma. In the 20th century, increased understanding of the more EXOTIC properties of matter resulted in the identification of many additional states of matter, none of which are observed in NORMAL conditions.

diphenyl

is the ORGANIC product FORMED when CHLOROBENZENE is treated with SODIUM in dry ether​

Answer:

if equivalent weight of s in so2 is 8 then equivalent weight of s in so3 is. THUS, 2 x 16g O combine with 32G S. The equivalent mass of O = 8G (by definition)

Explanation:

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Answer:Difference Between Mixtures and Compounds

July 4, 2018 By Rachna C 1 Comment

Mixtures_Vs_Compounds_content_img

The mixture contains two or more substances mixed, but neither chemically as well as not in inexact quantity while compound includes two or more elements combined chemically and in a fixed ratio. For instance, Seawater, Crude oil, Mineral oils, Alloys (Brass, Bronze), etc., are some of the mixtures, Water (H2O), HYDROGEN Peroxide (H2O2), Sodium Chloride (NaCl), Baking Soda (NaHCO3), etc. are the name of some compounds.

As per the classical physics theory, anything that occupies space has mass and volume is known as the matter. Even matter can be classified into two classes, mixtures, and the pure substances. Pure substances are made up of elements and compounds.

Elements are the simple substance and further cant be broken into more simpler forms. It contains only one type atom, but compound has two or more different atoms or elements, on the other hand, mixtures contain different substances.

On the way of highlighting the DIFFERENCES between mixtures and compounds in this content, we will be giving a brief description of them.

Content: Mixtures Vs Compounds

Comparison Chart

Definition

Key Differences

Conclusion

Comparison Chart

BASIS FOR COMPARISON MIXTURES COMPOUNDS

Meaning

Mixtures are the impure substances, made up of two or more physically mixed substances. They can be homogeneous or heterogeneous by nature. Compounds are the pure form, made up of two or more chemically mixed elements. These are generally homogeneous.

Composition

The substances which are found in the mixtures are not in fixed quantity, that means their ratio varies. But in the case of compounds, the elements are present in fixed quantity, that means their ratio is fixed.

Properties

The properties of the mixtures also vary (not fixed) as it depends on the type of substances and the quantity by which these are being mixed. For the particular type of compound, the properties are fixed and do not vary, as the elements present in the compounds are fixed and are in the fixed ratio.

Formula Mixtures do not have a certain formula.

Compounds have a specific formula, DEPENDING on the constituents present.

Separation

The substances of the mixtures are easy to separate by different physical methods like filtration, chromatography, evaporation.

The elements are not easy to separate and if done than it is by chemical methods.

Substances No new substances are formed from the mixtures, due to the unchangeable properties of its constituents.

There is always formation of the new substances, due to the mixing of the chemical properties of the different constituents.

Melting/Boiling point

Mixtures do not have fixed melting or boiling point.

The compound once formed, have fixed melting and boiling point.

Heat change

There is no heat change, or involvement of energy is observed when mixtures are made. There is a heat change, and energy is used or released during the formation of the compounds, as it is a chemical reaction.

Examples

Alloys like brass, bismuth, chromium, oceanic water (salt and water), mixtures of gases, etc. Compounds like Baking soda, Methane, Salt, etc.

Definition of Mixtures

When we look we found many things around us are mixtures, like air, rocks, the oceans, and even the atmosphere. These have the constituents mixed with physical properties and not with any chemical ones and not even in a fixed ratio. Therefore, we can say that formation of mixtures takes place by blending of two or more substances, but not in a fixed ratio.

In mixtures there is no occurrence of the chemical reaction, the fusion takes place in physically. So mixtures have two or more different types of atoms or molecules, or at least one atom and one MOLECULE. Mixtures do not have fixed melting or boiling point.

Mixtures can be separated by the physical methods such as filtration, decantation, distillation. Mixtures can be either homogeneous or heterogeneous.

Homogeneous Mixtures – These are regarded as true solutions, as the constituents present in this type are uniformly or equally distributed all over. For example sugar solution, mixing alcohol and water, etc.

Heterogeneous Mixtures – When the constituents are not evenly distributed in the mixture, it is known as the heterogeneous mixtures. For example, oil and water when mixed, a mixture of sulfur and iron, gravel, etc.

Apart from the above two, mixtures are further classified on the basis of the type of size of the particles present in that. These are solutions, suspensions, colloids.

Solutions – These contain the particles of the nano size, which are less than 1nm in diameter. The solution cannot be separated by the decantation or the centrifuge method. Dissolved oxygen in the water, air, gelatin are some of the examples.

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ANSWER:

There are 5 d orbital

Explanation:

dz2,DXY,DXZ,dyzand dx2-y2

Answer:

Photo decomposition is a CHEMICAL REACTION in which a substance is BROKEN down into simple SUBSTANCES by exposure to light (photons). Decomposition of calcium carbonate:Calcium carbonate (LIME stone) decomposes into calcium oxide (quick lime) and carbon dioxide when heated.

I hope this helps you

Well, you got a seven-coordinate IODINE CENTRE, whose COORDINATION geometry is pentagonal bipyramidal. You will have to consult your text, but I think at ROOM temperature, this structure is conformationally mobile, i.e. there is a SOFT energy of exchange between axial and equatorial positions, and thus say the  NMR spectrum would display a SINGLET. Below room temperature (quite possibly well below) the spectrum would resolve into two absorptions…corresponding to axial and equatorial positions…

1) calcium carbonate DECOMPOSES in calcium oxide & carbon dioxide when heated.

2)When heated strongly potassium chlorate decomposes into potassium chlorite and oxygen.

1) silver chloride decomposes into silver and chlorine .

2) HYDROGEN peroxide decomposes into water and oxygen.

Answer:

Sodium metal reacts RAPIDLY with water to form a colourless basic SOLUTION of sodium hydroxide (NaOH) and hydrogen GAS (H2). The reaction continues even when the solution BECOMES basic. The resulting solution is basic because of the dissolved hydroxide.

OPTION A

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ANSWER:

COMPOSITION of Ca, C & O in CACO3 are as follows

Ca=40%

C=12%

O=48%

Answer:

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Answer:mass of carbon is 12 and oxygen is 14 so 02 is 24 then ansewr by adding C and O2 is 36

Explanation:

For remembering name of ELEMENTS from atomic number 21 to 30, Mnemonics is as follows :

Now, TRICK to REMEMBER atomic MASS of 21 to 30 elements :

Trick : Double of Atomic number + Magic no.

If the difference between TEMPERATURE of the source and the sink is increased (i.e. temperature of source increase or temperature of sink DECREASES), the T1T2 VALUE decreases and THUS efficiency increases.

Answer:

the NEW COMPOUND is COPPER chloride which imparts blue green colour

So the activation energy for the REVERSE REACTION is the SUM of the enthalpy (delta H) and the activation energy (Eact) for the forward reaction. Note that the enthalphy change is negative for the forward reaction. ... If the forward reaction is endothermic, reactants will be lower in the energy diagram than PRODUCTS.

DIFFUSION is the property in which particles of a substance MOVES from ONE place to another and there is relative motion between the particles

now In solids the intermolecular forces between the particles are very strong and internuclear DISTANCES are very small so there is no space for the particles to MOVE so diffusion does not occur in solids

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Yes, of course since each and every SYNTHETIC fibre BURN quiet EASILY and sticks to the body and can cause SEVERE burns and since rayon is also a synthetic fibre, THUS it also burns easily and sticks to the body and can cause severe burns.

Explanation: Poly(ethene) is made by the addition polymerization of ethene. Alkenes can be used to make polymers such as poly(ethene) and poly(propene). In these REACTIONS, many simple small alkane MOLECULES known as monomers join TOGETHER to form COMPLEX molecules CALLED polymers.

ANSWER:

BRONZE is ODD ONE out here

CASO4. 1/2H2O.

is the CHEMICAL FORMULA for PLASTER of PARIS

EXPLANATION:

ACCORDING to Bragg's EQUATION,

Therefore the wavelength of Xray used will be of 2.28A

Answer:

SOLID carbon DIOXIDE is DRY ice used as a REFRIGERANT in long distance TRAVELLERS like ships

Explanation:

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In order for your lungs to breathe air in without duress, the pressure has to be higher outside your body. But at high ALTITUDES, the outside air pressure is LOWER than it is inside your lungs, MAKING it more difficult to pull in the thinner air and for your veins to pump oxygen throughout the body.

This is a charge balancing question.  

Fe exists in two forms mainly Ferrous (FE2+) and Ferric (Fe3+).

Let there are 100 OXYGEN ATOMS and x number of Fe3+ atoms and 96-x number of Fe2+ atoms.

100.18∘C

is BOILING point of 1 MOLAR aqueous SOLUTION of urea

ANSWER:

the BLUE ZONE of the CANDLE is the HOTTEST zone.

DIGESTIVE JUICES HOPE this HELP you

Answer:

Explanation:

Trinitrotoluene

Trinitrotoluene (TNT), a pale YELLOW, solid ORGANIC nitrogen COMPOUND used chiefly as an explosive, PREPARED by stepwise nitration of TOLUENE.

ANSWER:

EXOTHERMIC HAI ROASTING......

Answer:

Formic ACID is monobasic.

Acid never REACT with water, it DISSOLVES in water.

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Explanation:

The following can indicate that a chemical change has TAKEN place, although this evidence is not conclusive:

• Change of door.
• Change of color (for example, silver to reddish-brown when IRON rusts).
• Change in TEMPERATURE or energy, such as the production (exothermic) or LOSS (endothermic) of heat.

ANSWER:

the CHARACTERISTICS of particles of MATTER:

The particles of matter are very, very small. The particles of matter have space between them. The particles of matter are constantly MOVING. The particles of matter ATTRACT each other.

ANSWER:

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ANSWER:

Rearrange the SENTENCE MEANS to arrange a sentence from the JUMBLED word given in a sentence.

KETONES, and aldehydes, depending on workup......

Explanation:

R

1

R

2

C

=

C

R

3

R

4

O

3

−−→

R

1

R

2

C

=

O

+

O

=

C

R

3

R

4

.

While aldehydes are UNSTABLE with respect to OXIDATION, you should be able to chop up an olefin to give a series of aldehydes and ketones. If you can individually identify each oxo-compound, you could evidence the structure of the original olefin by WET chemical METHODS.

ANSWER:

Explanation:advertising is a type of FAVOURING the product. It is used to make people aware of that product and BUY that product.advertising make people BENEFIT of that product also.

ANSWER:

H2o ,NH ,So, H2s , C2H6O EXAMPLES for polar covlent MOLECULES

Answer:

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ANSWER:

The enthalpy of FUSION of a SUBSTANCE, also known as (latent) HEAT of fusion is the change in its enthalpy resulting from providing energy, typically heat, to a specific quantity of the substance to change its state from a SOLID to a liquid, at constant pressure.

Explanation:

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Answer:-

Chemical reaction is a chemical change that occurs in the reactants to FORM the products.

The types of chemical REACTIONS are:-

• Combination Reaction
• Decomposition Reaction
• Displacement Reaction
• DOUBLE Displacement Reaction
• Oxidation and Reduction Reaction

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Combination:-

When two reactants react to form a single product is known as a combination reaction.

CaO + H2O ---> Ca(OH)2 + Heat

Decomposition:-

When one reactant break down into simpler products is known as decomposition reaction.

CaCO3 ---(Heat)--> CaO + CO2

Displacement:-

When one ELEMENT and compound reacts where the element displaces the element in the compound, is known as a displacement reaction.

Fe + CuSO4 ---> FeSO4 + Cu

Double Displacement:-

When two compounds react and there is a displacement of the elements in the compounds, then this reaction is called as double displacement reaction.

Na2SO4 + BaCl2 ---> BaSO4 + 2NaCl

Oxidation and Reduction Reaction:-

When in a reaction something is oxidized and something is reduced,it can be called as oxidation and reduction reaction or redox reaction.

Oxidation happens when oxygen is added to something or hydrogen is reduced from something. And reduction happens when oxygen is reduced from something or hydrogen is added to something.

CuO + H2 ---(Heat)---> Cu + H2O

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