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.

Why ionisation enthalpy of lanthanides is higher than actinides

Answer»

Answer:

in LANTHANIDES electrons enter in the 4F orbital but in actinides it is in 5f orbital .

the 5f ORBITALS extrude outside more than 4f. So 4f electrons are more influenced by nuclear ATTRACTION than 5f electrons. So removing electron from 4f is harder that reflects the ionisation energy trend.

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2.

Why ionic compounds conduct electricity in molten state

Answer»

ANSWER:

because they have FREELY MOVING IONS

3.

Which will be more prefer first double bond or chlorine?

Answer»

ANSWER:

The more PREFER is CHLORINE

4.

Write the properties of rayon and nylon​

Answer»

ANSWER:

Properties of Rayon:

Rayon Fiber is comfortable, soft to the skin, and has the moderate dry strength and abrasion resistance. One of the Rayon Fiber's strengths is its versatility and ability to BLEND easily with many fibers—sometimes to REDUCE cost, other times for luster, softness, or absorbency and resulting comfort.

Properties of Nylon:

The properties which make Polyamides suitable for plastic applications are resistance to toughness , thermal stability , good appearance , resistance to chemicals etc .The advantages of Nylon 66 are- 1.Nylon 6,6 persues excellent abrasion resistance and a high melting POINT .

Explanation:

hope it will help you

5.

Which metal have been named after albert einstien

Answer»

ANSWER:

einstenium

Explanation:

¶670$6_99669$6707_9_70"70070_"70_70797$07060$69$6$90770_96$69$_9669$6_6069"69_/6$6/"69"/++-/+"/-""+/"++/"6//+"69"/-/"/-"6"'7'7//7/+/"'7/

6.

Give example also via metal bicarbonate can react with acid

Answer»

metal CARBONATE => na2co3

ACID => h2so4

na2co3 + h3so4 -------> na2s04 + h20 + CO2

7.

Find a gas fills completely The vessel in which it is kept

Answer»

Answer:

A GAS Has Maximum ENTROPY

Explanation:

Entropy is the RANDOMNESS in molecules, the INTERMOLECULAR FORCES of attraction between particles is less

8.

Which elements are good conductors of heat and electricity?

Answer»

ANSWER:

METALS are good conductor because they have free ELECTRONS .

Silver and copper are the TWO best conductor and electricity .

LEAD is the poorest conductor of heat

Bismuth, Mercury and iron are also. poor conductors

9.

Which gas is evolved when a metal reacts with dilute acid?

Answer»

ANSWER:

HYDROGEN GAS is EVOLVED

10.

Which element is essential for photolysis of water?

Answer»

ANSWER:

The elements MANGANESE and CHLORINE are very CRUCIAL for the process of photolysis of water.

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11.

Why gasoline tanks are generally painted with aluminium paint

Answer»

Answer:

GASOLINE Tanks are coated/painted with aluminium because :

The aluminium is quite CORROSION resistant and least affected by salt water and other corrosives found in the MARINE environment..

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12.

Why do fluorocarbons have lower boiling point than hydrocarbons

Answer»

Answer:

The INCREASED boiling point is easily explained by the stronger dipole-dipole attraction.

The graph shows that the polar effect DIMINISHES as the size of the molecule increases. ...

However, above 4 CARBON atoms the boiling points of the perfluorocarbons are less than the hydrocarbons INDICATING weaker attractive forces.

13.

Why emulsion is less stable after just preparation

Answer»

Answer:

EMULSIONS that have smaller size DROPLETS will generally be more stable.

For water separation, drops MUST coalesce—and the smaller the drops, the greater the time to separate.

The droplet-size distribution affects emulsion viscosity because it is HIGHER when droplets are smaller

14.

Which reagent used to convert acetaldehyde to acetamide?

Answer»

Answer:

The Schmidt reaction is an organic reaction in which an azide REACTS with a carbonyl DERIVATIVE, usually a aldehyde, ketone, or CARBOXYLIC acid, under acidic conditions to ... These

15.

*14. In the electrolysis of AgNO3 solution 0.7g|of Ag is deposited after a certain period oftime. Calculate the quantity of electricityrequired in coulomb. Molar mass of Ag is107.9 g molCir​

Answer»

ANSWER:

what... do... it......

16.

How to detect colours of all reactions?

Answer»

ANSWER:

What do you mean by how can U DETECT COLOURS if you have cones in your eyes you will surely see the colour formed after the reaction

Explanation:

17.

Which refrigerant has the highest critical point temperature?

Answer»

ANSWER:

The CRITICAL temperature of a refrigerant is the point at which it CHANGES states. In a REFRIGERATION scenario, this happens 2 times per cycle

18.

What type of dislocation modelling we can do using molecular dynamics?

Answer»

ANSWER:

Modelling and Simulation in Materials Science and ....

In the present RESEARCH, we employed ATOMISTIC ... by the center of mass of the ATOMS that do not form a LOCAL

19.

Why does the activity of pure element equal to unity

Answer»

Answer:

The activity of pure SUBSTANCES in condensed phases (solid or liquids) is normally taken as unity (the number 1).

Activity DEPENDS on temperature, pressure and composition of the mixture, AMONG other THINGS. For gases, the activity is the effective PARTIAL pressure, and is usually referred to as fugacity

20.

Why does the molar absoptivity of dna decrease on intercalation with complexes

Answer»

Answer:

Unlike the metal complexes of phen or bpy

(bpy=2,2’-bipyridine), the mixed-ligand metal com-

plexes of phen and dppz have been unambiguously

shown to intercalate into the BASE PAIRS of DOUBLE

helical DNA [8, 18 – 23]. The mixed-ligand ruthe-

nium(II) complex [Ru(phen)2(dppz)]2+ has so far been

most extensively used for the DNA-binding studies

and reported to be an avid binder of DNA [18 –

23]. However, DNA-binding studies of mixed-ligand

metal complexes with the central metal ions other

than ruthenium(II) have attracted much less atten-

tion except for recent reports on rhodium [7], os-

mium(II) [8], cobalt(II) and nickel(II) [10] and rhe-

nium(I) [11] complexes. Clearly, further studies of the

mixed-ligand complexes of central metal ions other

than the above mentioned metal ions are needed to

investigate the influence of the changes in geometry,

charge, spin state, redox potential etc. on the DNA-

binding process and mechanism of the mixed-ligand

complexes. These studies also serve as complemen-

tary ones to those of mixed-ligand complexes con-

taining ruthenium(II) and other metal ions mentioned

above. In the present study, the DNA-binding proper-

ties of bis(1,10-phenanthroline)(dipyrido[3,2-a:3’,2’-

c]phenazine)iron(II), [Fe(phen) 2(dppz)]2+ (Fig. 1)

have been fully characterized by means of equilib-

rium binding constant (Kb), melting temperature (TM)

of double helical DNA upon binding to the metal

complex, thermodynamic parameter of the DNA bind-

ing, and enantioselectivity of the DNA binding of the

iron(II) mixed-ligand complex.

21.

Why does micelle formation not take place in ethanol

Answer»

Answer:

SORRY I don't know. PLZZZ FORGIVE. I'm just PRIMARY student

22.

Which oxide of carbon is anhydride of carbonic acid?

Answer»

Answer:

carbon dioxide is ANHYDRIDE of CARBONIC ACID.

23.

Why the water turns yellow in electrolysis of water ​

Answer»

ANSWER:

I don't KNOW the answer SORRY MATE !

24.

How to calculate limiting reagent​

Answer»

Answer:

AS I SPEND MY PRECIOUS TIME BY ANSWERING YOU SO PLZ DO A FAVOUR OF ME AND MARK THE ANSWER AS BRAINIEST

Explanation:

he LIMITING reagent is that reactant that produces the least amount of product. Mass-mass calculations can determine how much product is produced and how much of the other reactants remain.

Chemical reaction equations give the ideal stoichiometric relationship among reactants and PRODUCTS. However, the reactants for a reaction in an experiment are not necessarily a stoichiometric mixture...

25.

The value of the static constant K when the heat is rising

Answer» 0 degree CELSIUS is 273.15 K
Enjoy mate
PLS mark as BRAINLIEST:):)
26.

A sample contains 200 atoms of hydrogen,0.05gm atom of nitrogen,10 raise to -20gm atom of oxygen.what is the approximate no. Of total atoms

Answer»

ANSWER:

2.1507×10^21 atoms is the correct answer.

Explanation:

GIVEN data :

Number of atoms of hydrogen = 200

No of atom of NITROGEN = 0.05

Number of atom of oxygen = 10^-20

To find

The approximate number of total atoms

Solution:

We know that

14 GRAMS of nitrogen will require 6.022×10²³ atoms

Therefore 0.05 grams of nitrogen will require X atoms

By cross multiplication,

x = 6.022×10²³ × 0.05/ 14

= 2.1507×10²¹ atoms of nitrogen

Therefore 0.05 grams of nitrogen will require 2.1507×10²¹ atoms

Now we know that,

16 grams of oxygen will require 6.022×10²³ atoms

Therefore 10^-20 grams of oxygen will require x atoms

By cross multiplication,

x = 6.022×10²³ × 10^-20/ 16

= 376.375 atoms

Therefore 10^-20 grams of oxygen will require 376.375atoms

Now total atoms of compund

= atoms of hydrogen+ atoms of nitrogen+ atoms of oxygen

= 200+ 2.1507×10²¹ + 376.375

= 2.1507*10^27 atoms

Hence, 2.1507×10^21 atoms is the correct answer.

27.

What is corrosion? Give it's chemical equation and research on the devasting effects of corrosion. Also mention some measure to reduce it.

Answer»

HERE IS YOUR ANSWER:

HOPE THIS HELP'S YOU

28.

Percentage of freebspace in bcc unit cell

Answer»

Explanation:

32%

PERCENTAGE of FREE space in BCC unit CELL is.

29.

Why does lambda maz shifts in graphene oxide sample

Answer»

EXPLANATION

HOPE it HELPS you

30.

Why does lithium form monoxide but not other alkalimetals

Answer»

ANSWER:

sodium does FORM a monoxide.

EXPLANATION:

CHECK it.

31.

Which is the the major form of lipid component existing in the vegetable oil?

Answer»

Answer:

TRIACYLGLYCEROLS is the the major form of lipid COMPONENT existing in the VEGETABLE oils.

P.s. Please mark this as the BRAINLIEST answer.  Thank you :)

32.

Difference between Primary battery and Secondary battery.

Answer»

ANSWER

PRIMARY BATTERY

Those battery which produce electrical energy from chemical energy is known as primary battery. In these battery, the reaction will occurs only once and after use over a PERIOD of TIME it becomes dead and can not be reused again.

For example, dry cell or leclanche cell and MERCURY cell.

SECONDARY BATTERY

The battery which can be recharged after use by passing electric current through it in the opposite direction is called Secondary battery. A good SECONDARY battery or cell can be UNDERGO a LARGE no. of discharge or charged cycles.

For example, Lead storage cell and nickel cadmium cell.

33.

Which contains greater number of oxygen atoms(1) 1 gm of o2) 1 gm of o3(3) 1 gm of o2(4) All have same number of oxygen atoms​

Answer»

1GM of O3 CONTAIN GREATER no of OXYGEN

34.

Explain the role of sun in soil formation with the help of flowchartj

Answer»

Answer:

i can't SHOW flowchart

may this answer helps you

because it SOAKS water and helps it to take PERFECT nutrition

35.

A thermometer contains 0.004 moles of mercuryCalaculate a weight of mercury1-number of moles of Mercury2-number of grams of Mercury3-number of atoms of mercury​

Answer»

ANSWER:

OKK MAKE we will CALCULATE it !

36.

Calculate the number of moles in 392 gram of sulphuric acid​

Answer»

Answer:

1 MOLE of h2so4=98gm=6×10^3 molecules.

therefore, 98gm =1 mole

392 gm=1/98×392 MOLES=4 moles

37.

Give 5examples of reactions showing change in state and temperature each

Answer»

ANSWER:

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38.

Have you heard of camping say not to plastic coin a few more slogan of this kind

Answer»

Answer:

1. Be the avengers, save the world, not by fighting, but by avoiding, PLASTIC BAGS

2. Plastic plastic go away, I want my earth to play

3. Be RESPONSIBLE!, stop plastic bags, go for jute bag, take the lead!!

39.

Why do we need to dispose synthetic polymers wisely?

Answer»

Answer:

Most polymers such as poly(ethene) and poly(propene), are actually not biodegradable, which means that microorganisms are not able to degrade them, so they last for MANY years.Therefore, we need to dispose them wisely.

Toxic gases are generated UNLESS they are INCINERATED at high temperatures.

However, they can be degraded by USING specific chemicals.

40.

What is the purpose of chlorination of water is done?

Answer»

<STRONG>Answer:

Chlorine is a strong oxidizing agent and a very effective disinfectant. Chlorination of water is done by ADDING chlorine to water to kill the toxic microbes and bacteria in the water. This PROCESS also avoids getting affected by waterborne diseases LIKE typhoid, dysentery, and cholera.

P.s. Please mark this as the BRAINLIEST answer.  Thank you :)

41.

Why do carboxylic acids have higher boiling points than alcohols

Answer»

ANSWER: Carboxylic acids have higher BOILING points than ALCOHOLS because of hydrogen bonding. Carboxylic acid forms higher hydrogen bonding as comapred to alcohols.

42.

Which type of isomerism is shown by 2 3-dichlorobutane?

Answer»

ANSWER:

it is a GEOMETRICAL ISOMER

43.

What is the position of metalloids in periodic table?

Answer»

Between METALS And NON Metals

44.

Why does alkene undergo ellectophillic addition reaction

Answer»

Answer: Alkenes are double bonded carbon chains. They have pi-BOND too with SIGMA bond. As we know, pi bonds are weak bonds than sigma bond so it undergoes Electophilic ADDITION Reaction.

45.

Why diamond is insulator and graphite is conductor

Answer»

Answer:

Graphite can CONDUCT electricity because of the delocalised (FREE) electrons in its structure. These ARISE because each carbon atom is only bonded to 3 other carbon ATOMS. However, in diamond, all 4 outer electrons on each carbon atom are used in covalent bonding, so there are no delocalised electrons and thus it is an insulator.

P.s. Please mark this as the brainliest answer.  Thank you :)

46.

Why does a balloon blow up when you mix vinegar and baking soda

Answer»

ANSWER:

a BALLON blows up when mixing vinegar and baking soda because ,their reaction produces CO2 and INFLATES the baloon

47.

Which is the best natural antioxidant ascorbic acid?

Answer»

EXPLANATION:

the best NATURAL antioxidant is a pic acid is

48.

How many atoms and molecules of sulphur are present in 64 gram of sulphur?​

Answer»

26 ATOMS jfohxigsu. chidtsi

49.

How can we separate mixture of two immiscible liquids​

Answer»

ANSWER:

by SIMPLY USING a SEPARATION FUNNEL.

50.

Formula for molten iron

Answer»

ANSWER:

FE is the FORMULA for MOLTEN IRON