Explore topic-wise InterviewSolutions in Current Affairs.

Answer:

The reaction in each half-cell does not occur unless the two half CELLS are connected to each other. Reversible & Irreversible cells: Reversible electrochemical cells are the cells whose cell REACTIONS can be GET reversed when an external emf greater than its CAPACITY is APPLIED.

Answer:

Aqua regia is a mixture of nitric acid and HYDROCHLORIC acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange fuming liquid, so NAMED by alchemists because it can dissolve the noble metals GOLD and platinum, THOUGH not all metals

Explanation:

accotding to memillion BILLION ATOMS can be present in 20 gram of OXGYEN

Answer:

this is due to RATE of diffusion of hot GASES released by the hot FOOD is much faster than rate of diffusion of cold gases released by cold food.

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maximum oxidation number is of Mn ...

it shows oxidation states like

(+2,+3,+4,+5,+6,+7)

whereas oxidation states of Cr is {( +2,+3,+4,+5,+6)

your ANSWER is option D

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ANSWER:

ULTRAVIOLET, X-rays, and gamma-rays.

ANSWER:

HEY HERE IS YOUR ANSWER

C2 IS DIAMAGNETIC

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ANSWER:

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ARGON

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Answer:

the discovery of NEUTRON is LATE because it has no charge... and SCIENTIST do same thing for finding neutron as LIKE ELECTRON or proton

Answer:

HEY HERE IS YOUR ANSWER

THE MKS SYSTEM IS FIRST INTRODUCE BY GIORGI.

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ANSWER:

HEY HERE IS YOUR ANSWER

ZYMASE

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Answer:

HEY HERE IS YOUR ANSWER

Explanation:

Milk has significant amounts of vitamin A and B vitamins such as thiamine, riboflavin and NICOTINIC acid, but is a poor source of vitamin C and vitamin E. It also contains vitamin B12. The IMPORTANT MINERALS in milk are calcium, phosphorus, sodium and potassium. It is, HOWEVER, a poor source of iron.

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ANSWER:

The CHEMICAL FORMULA of WATER is H2O

ANSWER:

HEY HERE IS YOUR ANSWER

THE STRUCTURE OF IF7 IS PENTAGONAL BIPPYRAMID.

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ANSWER:

LAW of CONSERVATION of MASS

ANSWER:

refrigerator

water

bathing

boiling

cloths DRY

So MUCH HEAT is released that the solution may BOIL very violently, SPLASHING CONCENTRATED acid out of the container and all this because the reaction is exothermic.

Answer: because PERFUME is a volatile substance and when it is prayed the moment it becomes VAPOURS. The particles of perfume have GOOD tendency to intermix

with particles(diffusion) of air can travel SEVERAL metres

Explanation:

ANSWER:

NUCLEAR REACTION...................

The CONDITION produced by AERIAL oxidation of fats and oils in food marked by unpleasant smell and taste is CALLED rancidity.

Oxidation has damaging effect on food containing fats and oils. When the fats and oil present in food material get oxidised by the oxygen, their oxidation products have unpleasant smell and taste.

We can PREVENT rancidity by :

1) Adding antioxidants to food containing fats and oils.

2) Packaging fat and oil containing foods in Nitrogen gas.

3) Keeping food in refrigerator (reducing the temperature).

4) Storing food in airtight containers.

5) Storing food away from LIGHT.

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The chemical formula for rust is Fe2O3. Rust is formed when iron reacts with oxygen in moist air. The following chemical equation represents the REACTION: 4Fe + 3O2 → 2Fe2O3. Water is necessary for the OXIDATION reaction to occur and to facilitate transport of the electrons.

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Determination of strength of KMnO4 USING STANDARD solution of oxalic acid. In this titration KMnO4 is the TITRANT and oxalic acid is the analyte. Here, potassium permanganate is the oxidizing AGENT and oxalic acid is the REDUCING agent.

Zinc CHLORIDE would be FORMED removing IRON from inron chloride its displacement REACTION

Answer: 1. THERMAL DECOMPOSITION

E.g. : Caco3 -> CAO + CO2

2.Electolytic decomposition /electrolysis

E.g. : 2H2O -> 2H2 + O2 ( by electrolysis)

3. Photolytic decomposition/ photolysis

E.g. : 2AgCl -> 2Ag + Cl2

Answer:

1)yes

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ANSWER:

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ANSWER:

Chromium(II) FLUORIDE is an INORGANIC compound with the FORMULA CrF2. It exists as a blue-green iridescent solid.

Chemical formula: CrF2

Appearance: blue-green iridescent crystals; hygroscopic, turns to CR2O3 when heated ...

Molar mass: 89.9929 g·mol−1

Answer:

4:3

Explanation:

1 mol of IRON (Fe) reacts completely with 0.65 mol O, to

give a MIXTURE of only FeO and Fe,0,. Mole ratio of

ferrous oxide to ferric oxide is :

2Fe + O2 ==> 2FeO

a a/2 MOLES a

4Fe +3O2 ===> 2Fe2O3

b 3b/4 moles b/2

a+ b = 1

a/2 + 3b/4 = 0.65

or 1/2 a+ 1/2 b = 1/2 ( I SUBSTITUTE the FIRST equation with 1/2)

a/2 + 3b/4 = 0.65

==> b = 0.6 moles

a= 0.4 moles

--> moles FeO = 0.4 moles

moles Fe2O3 = 0.6/2 = 0.3 moles

===>

Ratio = 0.4/0.3 = 4/3

Conversion for 1-bromobutane to 1-butanol.....

→ Ch₂-Ch₂-Ch₂-Ch₃      to     Ch₂-Ch₂-Ch₂-Ch₃

    |                                          |

   Br                                       OH

Reacting ALKYL Hallide with KOH(aq.) to form ALCOHOL,

→  Ch₂-Ch₂-Ch₂-Ch₃  + KOH(aq.) ⇒ Ch₂-Ch₂-Ch₂-Ch₃

     |                                                     |                        

    Br                                                  OH

Answer:

Explanation:

compound name  Molecular            

1 Acetic ACID  CH3COOH

2 Hydrochloric acid  HCl

3 SULFURIC acid  H2SO4

4 Acetate               CH3COO–

5 Ammonia  NH3

6 Nitric acid           HNO3

7 Phosphoric acid H3PO4

8 Sodium phosphate Na3PO4

9 CALCIUM carbonate  CaCO3

10 Ammonium sulfate  (NH4)2SO4

11 Carbonic acid                       H2CO3

12 Sodium bicarbonate  NaHCO3

13 Sodium hydroxide  NaOH

14 Calcium hydroxide Ca(OH)2

15 Ethanol  C2H5OH

16 Hydrobromic acid  HBr

17 Sulfuric acid  H2SO4

18 Nitrous acid ‎ HNO2

19 Potassium hydroxide  KOH

20 Silver nitrate       AgNO3

ANSWER: The IUPAC NAME of Ch₃OCh₂Ch₃ is METHOXYETHANE.

favourable conditions for forming stable ionic bond are : (i) LOW ionization ENTHALPY of element forming CATION. (ii) More negative electron gain enthalpy of element forming anion...

ANSWER:

MOLE = 39.4/197 = 1/5

no of ATOM = 1/5 * 6.022*10^23

= 1.20 * 10^23 ATOMS APPROX

The upper right nitrogen has an sp2 hybridization, SINCE it has three electron groups, so that lone pair is localized outside the RING. That means it won't participate in the DELOCALIZATION presented in imidazole's RESONANCE structures, and HENCE, does not count towards Hückel's Rule

The general formula of most interhalogen compounds is XYn, where n = 1, 3, 5 or 7, and X is the less electronegative of the two halogens. ... There are never more than two types of halogen ATOMS in an interhalogen MOLECULE.

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CACO3 --- CAO + CO2 + HEAT

The amphoteric nature of the ELEMENT explains that it can react with both acids and BASES. Aluminium dissolves in mineral adds and AQUEOUS alkalies and THUS shows amphoteric character. Aluminium dissolves in dilute HQ and liberates dihydrogen

ANSWER:

The wide optical TRANSPARENCY range, VARIABLE index of ... capability, and high optical transparency make amorphous HTO thin films .... as high-k GATE DIELECTRICS,” Microelectron

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Answer:

Hydrogen peroxide is preferred in the PREPARATION of OXYGEN gas because:-

1. No heating is REQUIRED for it.

2. The RATE of evolution of oxygen (O²) MODERATE and under control.

Answer:

because if GYPSUM WOULD be heated more than 373K it will for CaCo3(CALCIUM CARBONATE)

Explanation:

Its chemical formula is NaHCO3 and is generally known as sodium BICARBONATE. BAKING soda is synthesized through Solvay's process. Solvay's process involves the reaction of sodium chloride, AMMONIA and carbon dioxide in water. ... It is used for MAKING soda-acid FIRE extinguisher.

EXPLANATION:

because it has more no. of ELECTRONS.

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>>There is presence of intermolecular Hydrogen BONDS in H20 which is not there in H2S.Hydrogen bond is more strong than Van Der Waals Force(PRESENT in H2S), so H20 is more stable.During boiling, one has to break the bonds and hence greater amount of energy is required in case of H20 SINCE it is more stable and thus it has high boiling POINT as compared to H2S.

When zinc sulfide is heated in air, zinc OXIDE and SULFUR dioxide forms: 2ZnS(s) + 3O2(g) = 2ZnO(... When zinc sulfide is heated in air, zinc oxide and sulfur dioxide forms: 2ZnS(s) + 3O2(g) = 2ZnO(s) + 2SO2(g) How MANY grams of zinc oxide is formed when 100 grams of zinc sulfide is burned

feoh3 + 3HCL =FECL3 + 3H2O

ANSWER:ZNSO4,snso4

Explanation:

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In electrochemistry, the Nernst equation is an equation that relates the REDUCTION potential of an electrochemical reaction (half-cell or full cell reaction) to the STANDARD ELECTRODE potential, temperature, and activities (often approximated by concentrations) of the chemical species UNDERGOING reduction and oxidation .

Answer:

an IMPURE SUBSTANCE

Explanation:

because as from coming from COW it may contain some bacteria