Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

1st order reaction depends on which factors

Answer»

the rate CONSTANT. Which depends upon temperature, IONIC strength, suface area of REACTANT, light irradiation,presence of catalyst .

2.

Can you say why electric wireare not made up of silver

Answer» WIRES are MUCH cheaper than silver and silver is also not a good conductor of electricity. So ELECTRIC wires are not MADE up of Silver.
3.

H2s+cl2=s+2hcl which substance is oxidizing and reducing agent.

Answer»

S is OXIDIZING AGENT.Cl2 is REDUCING agent. HOPE it HELPS...!!

4.

The no.of moles of KCl in 1000ml water of 3 melar solution is

Answer»

no. of MOLES= MOLARITY*volume =3*1 LITRE =3moles

5.

there is an anomaly when it comes to the position of hydrogen because it can be placed either in the first group or 17th group in the first period can you say why???

Answer»

because h2 BEHAVES both as alkaline metals and the HALOGENS. It has 1 valence ELECTRONS but ALSO has 1 valency. It exhibits the property of both 1st and 17TH group. Hence there is a anomaly

6.

GIVE THE SI unit of amount of substances.how it is defined

Answer»

of substance is a standard-DEFINED quantity that measures the size of an ensemble of particles, such as atoms, molecules, electrons, and other particles. It is sometimes referred to as chemical amount. The International System of Units (SI) defines the amount of substance to be proportional to the number of entities present. The SI unit for amount of substance is the mole. It has the unit symbol mol. The proportionality constant is the inverse of the Avogadro constant.The mole is defined as the amount of substance that contains an equal number of elementary entities as there are atoms in 12g of the isotope carbon-12.[1] This number is called the Avogadro number[2] and has the value 6.022140857(74)×1023.[3] On 20 May 2019, an updated, exact definition of the mole will come into effect.[4] It is the numerical value of the Avogadro constant, which has the unit mol−1, and relates the molar mass of an amount of substance to its mass. THEREFORE, the amount of substance of a sample is calculated as the sample mass divided by the molar mass of the substance.Hope it help

7.

How u can convert 1,1,2,2,- tetrachloroethane into ethyne

Answer» OLES NANH2....
8.

The weight of impure sample of kclo3 is decomposed in order to get 0.96 o2

Answer»

➡️ 2KCL + 3O2So, 2×122.5 GM KCLO3 = 3×32 gm O2So, X gm of it = 0.96 O2Hence, X = 2×122.5×0.96/3×32= 2.45 gm KClO3.

9.

Which is more strong among conc.H2SO4 and dil.H2SO4?

Answer»

rated H2SO4 is more stronger because DILUTE is made by ADDING WATER and so the ACIDIC nature of H2SO4 decreases..Hope it HELPS you..

10.

Basic berilium acetate

Answer»

eryllium acetate is the chemical compound with the FORMULA Be₄O(O₂CCH₃)₆. This compound adopts a distinctive structure, but it has no applications and has been only LIGHTLY STUDIED. It is a colourless solid that is soluble in organic solvents. Formula: C12H18Be4O13Solubility in chloroform: soluble

11.

How u can convert ethanol into ethene

Answer»

dration USING CONC H2SO4 as a CATALYST.

12.

Why Phosphorus has two valency-3,5?

Answer»

ains empty 3d orbitals so phosphorus can expand its octet by exciting on electron from 3s to 3d . Hence phosphorus can SHOW VALENCY 3 and 5 both. As it is a non metal , it tequire more 3 electrons to ATTAIN stable or noble CONFIGURATION by forming ionic bound.

13.

How mamy grams of chlorine can be produced by electrolysis of nacl with current of 2a for 20 min?

Answer» WER is 0.88.it is BASED on FARADAY's LAW of ELECTROLYSIS
14.

List Four reasons to support air is mixture not a compound

Answer»

tains DIFFERENT gases which are not present in a constant proportion..Compounds are defined as a SUBSTANCE made by adding TWO or more SUBSTANCES in a fixed proportion..This is one of the major difference between a compound and a mixture..HOPE this helps you..

15.

What are non-stoichiometric oxides give an example?

Answer» TAL oxides and SULFIDES have non - STOICHIOMETRIC example , for example stoichiometric (2) oxide , which is RARE, has the formula FeO, whereas the more common material is non- stoichiometric , with the formula , Fe0.95 O
16.

S2+ fills completely k and l shells and m shells completely. Explain

Answer» NUMBER of SULPHUR is 16 it has 2+ charge so it has totally 18 ELECTRONS  so it completely fills the K,land m SHELLS
17.

Eclipsed and staggered conformations of ethane

Answer»

ations of EthaneIntroduction to Conformational AnalysisTo understand why ethane has this extra degree of freedom, consider the cylindrically symmetric nature of $\sigma$ bonds. The $\sigma$ bond can maintain a full degree of overlap while its two ends rotate. Hence, the energetic barrier to rotation about sigma bonds is generally very low. Unlike $\pi$ bonds in alkenes, the C-C sigma bond does not hold the two methyl groups in fixed POSITIONS relative to one another. The different spatial arrangements formed by rotations about a single bond are called conformations or conformers.Figure %: FREE rotation about the C-C $\sigma$ bond in ethane.Visualizing ConformationsSeveral METHODS are used by organic chemists to help them visualize the conformations of molecules. One of these methods uses Wedges to denote bonds that are extending out from the plane of the page toward the reader and Dashes to indicate bonds that are going into the plane of the page away from the reader. This notation is FREQUENTLY used to represent the tetrahedral geometry of $sp^3$-hydridized carbons.A NEWMAN projection can be used to specify the conformation of a particular bond with clarity and detail. A Newman projection represents the head-on look down the bond of interest. The circle in the Newman projection represents the atom in front of the bond, and the lines radiating from the center are the bonds of that atom. The bonds of the rear atom emerge from the sides of the circle.Figure %: How to draw a Newman projection.Newman projections can be characterized by the angles formed between bonds on the front atom and bonds on the rear atom. Such angles are called dihedral angles. The full 3D shape of any molecule can be described by its bond lengths, bond angles, and dihedral angles.Conformations of EthaneWhile there are an infinite number of conformations about any sigma bond, in ethane two particular conformers are noteworthy and have special names. In the eclipsed conformation, the C-H bonds on the front and back carbons are aligned with each other with dihedral angles of 0 degrees. In the staggered conformation, the C-H bonds on the rear carbon lie between those on the front carbon with dihedral angles of 60 degrees.

18.

Draw the Newman projection formula of eclipsed conformation of ethane

Answer»

your ANSWER........!

19.

Experiment of soap and laser

Answer»

emonstrated that close visual inspection of the SURFACE of a soap FILM can reveal many interesting dynamical and STRUCTURAL features which change with time as the BUBBLE ages and thinsplease mark me as brainlest

20.

Radiation transfers thermal energy through?

Answer» MAGNETIC WAVES.
21.

What is nuclear fusion give one representative reaction?

Answer»

ar reaction in which atomic nuclei of low atomic number fuse to FORM a heavier NUCLEUS with the release of energy.the reaction is in the image i hope this helps please look forward to LEAVE a good comment and LIKEAND if u have any doubts please contact me o the ACCOUNT

22.

Water is a liquid at ordinary temperature but h2s is a gas why

Answer»

it is mixed with the molecules of OXYGEN and hydrogen MEANS H2O

23.

Plz answer the ques no. 8 ,most important.

Answer» ZE of M>SIZE of N.b) M is more METALLIC than N.c) MCL and NCl2.
24.

Justify the statement why air is a mixture not a compound?

Answer»

in air MANY gases are present LIKE oxygen nitrogen ammonia and OTHERS that's why I say this is a mixture not compound

25.

Which organic compounds are acidic, basic and neutral

Answer» ORGANIC COMPOUNDS form salts with a Brønsted BASE, such as sodium HYDROXIDE, and organic bases form salts with a Brønsted ACID, such as hydrochloricacid.
26.

How to do these type of problems please tell step by step. (The answer is a) -1310)

Answer»

s the QUESTION

27.

The ratio r+:i is 0.42 the cordination number of cation ?

Answer» WER is 6. HOPE it HELPS YA.
28.

What is colour of the crystal of benzene aja 2 naphthol?

Answer»

neazo-2-naphthol MOLECULAR FormulaC16H12N2O AVERAGE mass248.279 DA Monoisotopic mass248.094955 Da ChemSpider ID20481333

29.

Use of chloride/bromide ratios in studies of potable water

Answer»

tural ground water systems, both chlorine and bromine occur primarily as monovalent anions, chloride and bromide. Although dissolution or precipitation of halite, biological activity in the root zone, anion SORPTION, and exchange can affect chloride/bromide ratios in some settings, movement of the ions in potable ground water is most often conservative. Atmospheric precipitation will generally have mass ratios between 50 and 150; SHALLOW ground water, between 100 and 200; domestic sewage, between 300 and 600; water affected by dissolution of halite, between 1000 and 10,000; and summer runoff from urban streets, between 10 and 100. These, and other distinctive elemental ratios, are useful in the reconstruction of the origin and movement of ground water, as illustrated by case studies INVESTIGATING sources of salinity in ground water from Alberta, Kansas, and Arizona, and infiltration rates and pathways at Yucca Mountain, Nevada

30.

Why can't we use a cooking utensils made of carbonplease answer in a short way

Answer»

is inflammable. We require heat to COOK food. When heat is given to carbon it burns. THEREFORE we can't use utensils MADE of carbon for cooking.

31.

Write a note on nef carbonyl synthesis ansere

Answer»

thesis :This reaction was FIRST reported by john Ulric NEF in 1894. That's why it is known as Nef synthesis or Nef reaction. Nefreaction or synthesis involves acid HYDROLYSIS of a SALT of primary or secondary nitroalkane to yield carbonyl compound.

32.

Why the name nylon is given to the first synthetic poymer

Answer»

s a well-known synthetic polymer (derived from the Greek words 'poly' MEANING 'many' and 'meros' meaning 'parts'). It was invented by Wallace CAROTHERS, and first BROUGHT to the public's attention in October 1938. ... The monomers for NYLON 6-6 are adipic acid and HEXAMETHYLENE diamine.

33.

What happen whaen so2 gas is passed through acidified kcr2 solution?

Answer»

s into ORANGE to GREEN REDUCED CHROMIUM

34.

What happens when p hydroxybenzyl alcohol is treated with hcl?

Answer»

xybenzyl CHLORIDE is FORMED.

35.

Give the structural formula and iupac name of iso-butyl bromide

Answer»

1-Bromo-2-methylpropanePubChem CID 6555Chemical Safety LABORATORY Chemical Safety Summary (LCSS) DatasheetMolecular FORMULA C4H9BrSynonyms 1-Bromo-2-methylpropane 78-77-3 ISOBUTYL BROMIDE Propane, 1-bromo-2-methyl- iso-Butyl bromide More...Molecular WEIGHT 137.02

36.

Structure of (CH3)3cc2h5

Answer»

IUPAc names are CORRECT so what is your question actually, the structure given by you does not MATCH with any structures given there and the above FORMULA what you have used is not correct as it shows a VALENCY of 5 which is not possible for Carbon.If your query is STILL unsolved, kindly come back to us with a complete question so that we could help you.

37.

The no.of water molecules present in a drop of water weighing 0.05 mg

Answer»

olecules in a DROP of water of weight 0.05 MG is 10 POWER -3

38.

Why happens when white phosphorous is heated with concentrated NaOH solution in an inert atmosphere of CO2

Answer» OH +3H2O = 3NaH2PO2 +PH3Hope it HELPS!!!
39.

Phyaical characteristic of salt is anion or cation

Answer»

n identify the cation and anion in a GIVEN salt by using physical characteristics like color, taste, odor, melting point, solubility product ETC..from colors we observed : potassium dichromate, K2Cr2O7 ( orange) , potassium PERMANGANATE,KMnO4(violet), Ferric oxide, Fe3O4 (black), Ferrous sulphate , FeSO4.7H2O(green) etc.. here you can see same cation for different anions having different COLOURS.

40.

What happens to the oxidation number of an element during reduction?

Answer» EASES during REDUCTION.
41.

What happens to the acetic acid when it is added to distilled water and?

Answer»

distilled water is ADDED toethanoic acid a Homogeneous solution will be obtained and that solution will be colourless and transparent this SHOWS that ethanoic acid or acetic acid in soluble in water. ... The acid dissolves and partially dissociates to form C H 3 C O O − and ions. No chemical reactions OCCUR.

42.

Ti extract ethanol from sugar molasses which microbe is used

Answer»

the sugar-containing berries, fruits, sap from palms and HONEY is exposed in the air then the airborne yeast starts to ACT on the sugar in order to extract the alcohol and carbon dioxide. Even in the SCIENTIFIC methods, baker's yeast is added to the concentrated sulphuric acid to extract ETHANOL.

43.

How does metallic character change in a group in periodic table

Answer»

c character INCREASES on moving down in a GROUP of modern PERIODIC table.

44.

What are uses of Loamy soil

Answer»

oil is used more for growing more PLANT varieties as it has more NUTRIENTS and moisture

45.

Why is growing seedling from a seed is a chemical change

Answer»

a chemical change because after a seed GROWS into a seedling it is not possible for the seedling to change in its EARLY stage.Since chemical change is the change in which a new SUBSTANCE is formed and cannot be REVERSED.

46.

On increasing temperature increasing solubility of nacl in water occurs

Answer»

ing of the WATER the SOLUBILITY of water increases the nacl dissolve fast PLZ MARK this ANSWERS as a brainliest answers please please please please please please

47.

Why does flourine show abnormal properties ?

Answer»

e is the most electronegative element in the PERIODIC table .No other element is as electronegative as FLUORINE. Besides being the most electronegative element it has comparably small size in its group.So CAUSE this small size , repulsions are entertained within the atomCause of which it has abnormal properties when compared to its group constituents.Further their is no element which can OXIDIZE fluorine, Making it a strong oxidizing agent.hope it HELPS

48.

Draw the diagram for the shape of d and p orbitals.

Answer»

is will HELP you PLS MARK as BRAINLIEST and pls FOLLOW me

49.

Define lattice energy . how is it correlated with the stability of ionic crystal ?

Answer»

bility of an IONIC solid is measured in TERMS of its lattice energy (U0). It is defined as theenergy RELEASED when on mole of anionic crystal is formed from one mole of gaseous positive and one mole of gaseous negative ions, when these are separated from each other by infinite distance.

50.

Which is colour of all radicals positive and negative??

Answer»

the ANSWER PLZ THNK