Explore topic-wise InterviewSolutions in Current Affairs.

Answer:

Explanation:

The energy of a one electron atom or ion in a given quantum state is (to a first approximation) PROPORTIONAL to the SQUARE of the nuclear CHARGE, Z^2. The ionization energy is also proportional to Z^2, since that is the DIFFERENCE between the ground state of the atom/ion and the energy of the separated ion plus electron.

The charge of Be^(4+) is four times that of H^+, so the ionization energy of Be^(3+) is 4^2 or 16 times that of H.

Answer:

The atomic nucleus is the small, dense region CONSISTING of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden GOLD foil experiment. ... Protons and neutrons are bound together to FORM a nucleus by the nuclear force.

Answer:

R will be 1/ten OHMS

because RECIPROCAL of 1 is 1

and 1+1+1+1+1+1+1+1+1+1

=10

reci of this is 1/10

or 0.1 ohms answer

Answer:

the point charges -2-2can + q are put on the vertices of an EQUILATERAL triangle of side a find the work DONE by the same explanation

Answer: SODIUM(NA) and Chlorine(CL)

Explanation:The COMPOUND is NaCl.

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EXPLANATION:

HEY MATE

It's ANS is 0 in my opinion

Answer:

2

Explanation:

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ANSWER:

Electrolytic reduction is reduction of metals of metals using ELECTROLYSIS

Eg:- In metallurgy and Electroplating

Reduction with C is the process of reducing substances by passing C in amorphous FORM through substances that are to be reduced

Eg:- WOOD Charcoal, COKE, and other amorphous carbon are used to reduce metals

ANSWER:

For which transition IM h-atom the AMOUNT of energy RELEASED will be maximum

ANSWER:

we will PUT it in WASHING MACHINE for DRYING

Answer:

There are THREE covalent bonds one SIGMA and two PI and SP hybridization

Answer:

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Explanation:

The term “triatomic” merely means that the molecule contains a total of THREE atoms. These can be the same or different; just a total of 3. Examples would include ozone (O3), carbon dioxide (CO2), water (H2O), and HYDROGEN cyanide (HCN).

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Answer:

In chemical nomenclature, the IUPAC nomenclature of organic chemistry is a systematic METHOD of naming organic chemical compounds as recommended[1] by the International Union of Pure and Applied Chemistry (IUPAC). It is published in the Nomenclature of Organic Chemistry (informally called the Blue Book). Ideally, every possible organic COMPOUND should have a name from which an unambiguous structural formula can be created. There is also an IUPAC nomenclature of inorganic chemistry.

To avoid long and tedious names in NORMAL communication, the official IUPAC naming recommendations are not always followed in practice, except when it is necessary to give an unambiguous and absolute definition to a compound. IUPAC names can sometimes be simpler than older names, as with ethanol, instead of ethyl alcohol. For relatively simple molecules they can be more easily understood than non-systematic names, which must be LEARNT or looked up. However, the common or trivial name is often SUBSTANTIALLY shorter and clearer, and so preferred. These non-systematic names are often derived from an original so

Answer:

In Animal hybridization , The CROSS between TWO ANIMALS takes place to PROVIDE Hybrid Animal

Answer:

Here's your answer bro!!!!

Silver combines with HYDROGEN SULPHIDE to FORM BLACK silver sulphide.

ANSWER:

YOU WILL SEPARATE COMPONENT OF AIR BY USING LIQUIFICATION

EXPLANATION:

Answer:

Oxygen for EXAMPLE as an element on the periodic table is USED by mankind in various spheres of life INCLUDING hospitals on patients who have BREATHING problems. Nitrogen element has impacted GREATLY in the chemical industry. It is used in the manufacture of fertilizers, dyes and explosives.

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COAGULATION: The action or process of a liquid, especially blood, changing to a solid or semi-solid state.

Centrifugation: Centrifugation is a TECHNIQUE which involves the application of centrifugal FORCE to separate particles from a solution ACCORDING to their size, shape, density, viscosity of the medium and rotor speed.

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ANSWER:

co2gas

by passing through the LIME water

if it change into milky WHITE

then it confirms that it is co2gas

ANSWER:

The highest conversion of CO2 (14.63%) and selectivity/yield of HCOOH (87.75/12.84%) were gained USING Cu/CuCr2O4 catalysts calcined at 300 °C, since they have the most rich and most STRONGLY basic/acidic SITES required for conversion of CO2 into HCOOH

Explanation:

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WEIGH 1.260 g of oxalic acid crystals and dissove them in water to prepare 500 ml of M/50 oxalic acid solution using a 500 ml measuring flask. RINSE the PIPETTE with the M/50 oxalic acid solution and pipette out 20 ml of it in a washed titration flask. Rinse and FILL the burette with M/100 KMnO4 solution.

Answer:

The hydrogen atoms in ammonia have the same NUMBER of ELECTRONS as neutral hydrogen atoms, and so their formal charge is also zero. Adding together the formal charges should give us the overall charge on the molecule or ion. In this example, the NITROGEN and each hydrogen has a formal charge of zero.

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Antacids neutralize (reduce) EXCESS stomach acid to relieve heartburn, sour stomach, acid indigestion, and stomach upset. They can ALSO be used to relieve the pain of stomach and duodenal ulcers. Some antacids contain SIMETHICONE, which REDUCES GAS.

ANSWER:

The effect of concentration of the reactant on the rate of a reaction can be studied easily by the reaction between SODIUM thiosulphate and hydrochloric ACID. ... However, as the reaction proceeds, sulphur precipitates that make the solution more opaque and eventually the mark GETS COMPLETELY masked.

. The DIFFERENCE between elements and particles is that a particle is TYPICALLY a package of MASS and is WAY to small to be considered a element. The difference between substance and element is a substance is a form of MATTER that takes up space and an element is a pure substance that can NOT be broken down.

Answer:

By attempting to move away from the water molecules, the hydrophobic ends of the detergent molecules PUSH up to the surface. This weakens the hydrogen BONDS holding the water molecules TOGETHER at the surface. The result is a BREAK in the surface TENSION of the water

Explanation:

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ANSWER:

• NATURAL RUBBER IS A PLANT RESOURCE.
• PROTEIN IS BOTH PLANTS AND ANIMAL SOURCE.
• NUCLEUS ACID IS A PLANT SOURCE

ANSWER:

Then, the mole of AIR PRESENT in the OPEN vessel is heat 27°C to 120° c.

ANSWER:

the three substances are...

1. Ice

2. METAL

3. GHEE

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Answer:

The layer is CALLED Rust

Explanation:

Hydrated IRON(lll) oxide.

Fe2O3.nH2O

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EXPLANATION:

Mercury is a liquid which does not undergo for electrolysis .

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Answer:

TWO METALS that react vigorously with cold water are are sodium and potassium

Explanation:

sodium sodium and potassium are are elements of group 1 which have there one valence electron in the outermost shell which could be released easily

hence they take part in reaction very very fastly in comparison to other metals even with cold water they react vigorously

in fact all the group 1 metals react vigorously with cold water because they all have one valence electron in the outermost shell

but AMONG the group when metals the most reactive is francium which is a radioactive alkali metal WHOSE lifespan is is 20 minutes.

when such metals are dropped into the water then hydrogen gas evolves up with hissing sound. the temperature of the container in which the reaction is is taking place becomes very hot. sometimes if the relative quantity of metal ADDED to the water is is more than a mini explosion could take place.

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Answer:

Greenhouse gases include water vapor, carbon dioxide, methane, NITROUS oxide, and ozone. The MAJOR greenhouse gases are water vapor, which causes about 36-70% of the greenhouse effect on EARTH (not including clouds); carbon dioxide, which causes 9-26%; methane, which causes 4-9%, and ozone, which causes 3-7%.

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When a sodium compound X which is ALSO used in soda-acid fire extinguisher is heated gives a sodium compound Y along with water and carbondioxide. Y on crytallisation FORMS a compound Z. the compound X is NAHCO3 (sodium bicarbonate OR sodium hydrogen carbonate). the compound Y is NA2CO3(sodium carbonate).

Answer:

Explanation:

Acidic radical are anions which are negatively CHARGED. ... The ION formed after removal of Hydrogen ion (H+⁺ ion) from an ACID is called acid radical. Ex: When HCl LOSES H⁺ ion, it FORMS Cl-⁻ which is an acid radical. The ion formed after removal of hydroxide ions (OH-⁻ ions) from a base is called basic radical.

Answer:

nitrogen acts as INERT element by making TRIPLE BOND (n triple bond n) MOLECULES and it is very difficult to BREAK their bond and make other compounds as other elements do.

Answer:

KCL BREAKS down into potassium CATION and CHLORINE ANION

Explanation:

EXOTHERMIC reaction

1.heat is evolved or released

2.ENTHALPY change is NEGATIVE

3. summation of enthalpy of product less than summation of enthalpy of reactants.

Endothermic reaction

1.heat is absorbed

2.enthalpy change is positive

summation of enthalpy of product is HIGHER than summation of enthalpy of reactants.

Answer:

the difference between exothermic and endothermic REACTIONS are GIVEN below:-

Explanation:

Exothermic reactions

1. the reaction involves release of energy in form of heat.
2. Sach reaction increases the temperature around themselves where they are reacting.
3. such reactions are vigorous and spontaneous.
4. the the energy released can be in form of heat, light, or radiation.
5. such reactions are carried out by more electronegative elements and compounds.

Endothermic reactions

1. the reaction involves absorption of energy in form of heat
2. search reactions decrease the temperature around themselves where they TAKE place
3. such reactions are relatively slower than exothermic reactions
4. in this reaction energy is observed but not released and the temperature DECREASES around them.
5. such reactions are carried out by random elements and compounds.

random in the sense that the elements which carry such reaction are not specified for specific

Explanation:

An ELEMENT is a PURE form of substance which cannot be broken into SMALLER pieces.

A substance is a particular kind of MATTER with uniform properties

Explanation:

Answer:

The electronic configuration of BERYLLIUM is 1s2 2s2.

From the electronic configuration it is clear that there is no singly filled atomic orbital PRESENT in beryllium.

Without the HALF filled orbital,the overlapping is not POSSIBLE ,therefore Be2 molecule does not exist

Answer:

4.38

Explanation:

M1V1 PLUS M2 V2 equal to MOLARITY total into V1 Plus V2

20 into 4.5 + 30into 4.3 DIVIDED by 50 is equal to4.38

Answer:

Addition REACTIONS INVOLVING alkenes and alkynes include HYDROGENATION, halogenation, and hydrohalogenation.

ANSWER:

We know that, mole fraction can be calculated USING the following formula:

Here is partial pressure of B=100 mm Hg as in the vapor phase the partial pressure of B will be EQUAL to its vapor pressure in pure state.

And =(100+200)mm of Hg

so we get

=200/300

=2/3

Answer:

kJ

Explanation:

the given wavelength of an electromagnetic radiation is= 242nm=

the energy ASSOCIATED with this wavelength can be calculated by the formula

E=hc//\

here E stands for energy

h stands for Plank's constant whose value is Js

c is the speed of light whic is equal to

/\ stands for the  wavelength

so

E=kJ

since it is the minimum energy required to remove VALENCE ELECTION from Na...it is the I.E. of Na

So I.E. energy of Na is

Answer:

Explanation:

The s and the p-orbitals in an atom are present deep inside an atom, close to the nucleus. On the other hand, the d orbitals are at larger distance from the nucleus and are present at the BOUNDARY or the outer SURFACE of the atom. Hence, the electrons in the s and p orbitals are EMBEDDED inside the atom, because of which they are not much affected by the surrounding environment.  

On the other hand, the electrons in the d-orbitals are present closer to the boundary of the atom. As a result, the INTERACTION between these electrons and surrounding atoms or molecules is more. So these electrons affect the surrounding environment, and are ALSO affected by the surrounding environment.

Thermal Decomposition...**":;

..

Thermal decomposition is a form of chemical decomposition CAUSED by HEAT. It is also known as thermolysis. The temperature at which the decomposition initiates is known as decomposition temperature. It is a multi-step process.

Decomposition involves the breakdown of chemical bonds. In order to break a chemical bond, energy should be given from outside. Therefore, a thermal decomposition is usually an endothermic reaction.The most common example for substances that undergo thermal decomposition is TRANSITION metal carbonates.

Example of Thermal Decomposition..**";:

Calcium carbonate (CaCO3) decomposes into calcium oxide (CaO) and carbon dioxide (CO2) when heat is provided.

CaCO3(s)→CaO(s) + CO2(g)

......,.........,.................................................

THERMAL DISSOCIATION..**";:'

Thermal dissociation is the ionization of a substance using heat. The substance is separated into cationic and anionic counterparts. It is a single step process that includes the split of a substance into TWO parts. This reaction is usually a reversible process and one chemical bond is broken.

The original COMPOUND can be obtained by cooling the reaction mixture since the process is reversible.

Example...

CH3Br → CH3++ Br–

CH3-CH3 →CH3+ + CH3–

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ANSWER:

The test is based upon the difference in reactivity of primary, secondary and tertiary ALCOHOLS with hydrochloric acid. This test consists of treating an alcohol with Lucas reagent, an equimolar mixture of conc. ... (iii) Primary alcohols do not REACT with Lucas reagent at room temperature and hence no turbidity is formed.

Answer:

Resulting solution is basic in nature.

The millimoles of HCl is 1 and the millimoles of the NAOH is 25,000.

Means the REACTION is taking PLACE 1:1 hence 24999 milli MOLES are left of NaOH means the resulting solution is basic.

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