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.

Name any three physical and two chemical properties that prove copper is a metal.

Answer»

Hey mate ,

here is your answer ,

The other KEY properties EXHIBITED by COPPER and its alloys include:  

Excellent heat conductivity.


Excellent electrical conductivity.


Good corrosion resistance.


Good biofouling resistance.


Good machinability.


Retention of mechanical and electrical properties at cryogenic temperatures.


Non-magnetic.


Hope it HELPS !!!

2.

In exothermic reactions why products having lower energy than the reactants why

Answer»

The reactions in which HEAT ENERGY is released are called exothermic reactions.


In exothermic reactions, a part of the energy present in the reactants is PASSED on to the surroundings from the system in the form of heat.



Thus, the energy of PRODUCTS is LESSER than that of reactants.

3.

A magnet has attractive and directive properties both. Explain

Answer»

A magnet has attractive as well as divertive properties due to presence of POLES in magnet.

If we bring TWO magnets, both having same pole as north- north, then they will repel each other.

If we bring one magnet having North Pole and other having south pole ( OPPOSITE poles), then they will attract each other.

So, this is the phenomenon of DETERMINING of attractive and divertive property of a magnet.

4.

Give one word formation of ions from molecules

Answer» IONIZATION...........
5.

State the gas that has a characteristic rotten egg smell

Answer»

H2S i.e, HYDROGEN SULPHIDE GAS...


#Hope it HELPS.

6.

Molecular simulation for styrene polymer and graphene sheer

Answer»

A molecular level study has been made on enhanced MECHANICAL and tribological properties of graphene-reinforced styrene butadiene rubber (SBR) composites using molecular dynamics simulation technique. Constant strain method is APPLIED to calculate the mechanical properties of developed structures. Two molecular level layer model one with SBR and ANOTHER with graphene-reinforced SBR composites were developed, and shear LOADING was applied on the top and bottom Fe layers to study tribological properties, i.e., abrasion rate, and friction coefficient. The Young’s and shear modulus of composites with different graphene OXIDE volume fractions have been developed and studied. The 5 vol% addition of graphene into SBR matrix shows a significant increase in Young’s and shear modulus and hardness. By incorporation of the GO, 48 and 56% decrease in friction coefficient and abrasion rates of SBR polymer was observed, respectively. About 15% reduction in the RDF values of GO/SBR composites was obtained. The interaction energy between graphene oxide sheet and SBR matrix during the shear process has been obtained and discussed.

7.

Write the equation for the reaction of magnesium sulphate solution with barium chloride solution

Answer»

MgSO4+BaCl2will GIVE RISE to MgCl2+BaSO4

8.

Vapour pressure formulae

Answer»

In chemistry, vapor PRESSURE is the pressure that is exerted on the WALLS of a sealed container when a substance in it evaporates (CONVERTS to a GAS). To find the vapor pressure at a given temperature, use the Clausius-Clapeyron EQUATION: ln(P1/P2) = (ΔHvap/R)((1/T2) - (1/T1)).

I think it's hipl U :-))

9.

Writs the electronic configuration of cl, na , al

Answer»

Cl-2,8,7
na-2,8,1
al-2,8,3

10.

Why do we need to brush after eating sugary foods and chocolates?

Answer»

As the SUGARY toxic substance sticks in between the teeths which causes tooth DECAY and results in CAVITY.

11.

The gas which turns acidified potaasium dichromate clear green

Answer»

Sulphur DIOXIDE is the gas which TURNS acidified POTASSIUM DICHROMATE clear green.

hope it will help you

12.

What is the 2nd excitation potential of He+ ion?

Answer»

ANSWER:

Explanation:

for 2ND exitation POTENTIAL of He+

Z = 2

n= 2

E = 13.6*Z2/n2 = 13.6 eV

Hope it CLEARS...............................

13.

Match the term with its definition: osmotic pressure

Answer» OSMOTIC pressure is the minimum pressure which NEEDS to be applied to a solution to PREVENT inward flow of its PURE SOLVENT across a semipermeable membrane
14.

0.1 mole of NaOH is present in 250 ml of solution calculate the molarity

Answer» MOLARITY of SOLUTION is 0.4M
15.

If 10g of hydrogen and 142g of chlorine are reacted, find the volume of the HCl produced at STP

Answer»

Balanced Equation = H₂ + Cl₂ => 2 HCl


According to stoichiometry,


2 G of Hydrogen reacts with 71 g of chlorine to FORM 73 g of Hydrogen Chloride.


Therefore if 10 g reacts with 142 g of chlorine, the HCl produced will be

152 g or 152 ml of HCl



16.

Why are there more neutrons than protons in larger atoms

Answer»
17.

Sugar crystals and carrots are mixed together. Will it be a pure substance or a mixture? Give reasons...

Answer»

Mixture because it has TWO substances and a THING is pure only when it has only one constituent.

HOPE THE ANSWER HELPS YOU. PLS PLS MARK THE ANSWER AS BRAINLIEST ANSWER.

18.

Calculate the molarity of sodiumhydrocside solution by desoving 4g sodiumhydrocside in water to form 250ml solution .......fast its argent..........

Answer»

Molarity = Number of moles of solute / Volume of SOLUTION in liters


Number of moles of solute = GIVEN MASS / MOLAR mass


Given mass = 4 g


Molar mass of solute = NaOH = 23 + 16 + 1 = 40 g


Number of moles = 4 g / 40 g = 0.1 mole


Volume of solution = 250 ml = 0.25 liters


=> Molarity = 0.1 / 0.25 = 100 / 25 = 0.4 M


Hence molarity of that solution is 0.4 M.

19.

if an element has mass number 27 and atomic 13 , then find the number of electrons present in an atom of that element

Answer»

Since ATOMIC number=no of electrons THEREFORE there are 13 electrons in the given ELEMENT

20.

Diff between physical and chemical change

Answer»

I'm GIVING you answer but please mark it as BRAIN LIST.

21.

Which energy shell is the nearest to the nucleus

Answer» K ENERGY SHELL is the NEAREST
22.

Is electricity can pass through the glucose solution?

Answer»

HERE IS YOUR ANSWER

________________________________
When you actually pass ELECTRICITY, the GLUCOSE solution doesn't conduct electricity as in case of acids because there is no liberation of IONS which help in the CONDUCTION of electricity.
________________________________

THANK YOU

23.

List of organic chemistry reagents of 1 and 12

Answer» ACIDIC, OXIDIZING, REDUCING, ETC
24.

What is cotton chemical name

Answer»

Hey friend here is your ans

♡^▽^♡

Cotton is a soft, FLUFFY STAPLE fiber that grows in a boll, or protective CASE, around the seeds of the cotton plants of the genus GOSSYPIUM in the mallow family Malvaceae.
The cotton chemical name is Gossypium.

(HOPE it helps)

25.

why does symbols of 11 elements namely gold(Au)) ,silver(Ag) ,copper(Cu) ,pottasium(K),sodium(Na),iron(Fe),mercury(Hg),not match with their native names?

Answer»

Hii...
the answer to your QUESTION is....
they do not match with their native names because they are based on the latin names of the elements...
for example:-the latin name of GOLD is AURUM and THEREFORE the symbol of gold is Au.

26.

Calculate total number of optical isomers

Answer»
where is U R COMPOUND
27.

Plz give iupac name of it

Answer»

The name of I U P A C is International UNION of PURE and APPLIED chemistry


plzzz market as brainliest

28.

Explaination of water to blood experiment.

Answer»

The IODINE PRODUCED from the PERSULFATE- IODIDE reaction (1) is immediately reduced .... CHLORIDE, KCl; (v) 0.1M potassium sulfate, K2SO4.

29.

How to find resulting ph of salt formed by acid and base

Answer» NEUTRAL is your ANSWER
30.

Pls answer my question no.32

Answer» C)when we put some Acetone on our plane the particles of those substance absorb ENERGY from the plane and evaporate CAUSE cooling.
b)In summer we need clothes that can absorb our sweat so that we feel comfortable wearing it ...terylene cloth is a BAD absorber as water and hence we should not wear terylene clothes in summer.
31.

Pls answer my question no.27

Answer»

steam produces more SEVER burns than boiling water at same temp. becaue it has more enerygy than boiling water in form of latent heat of vapourisation so when it will touch your skin, it will transfer this ENERGY to your skin and produce more severe burns.

PLEASE MARK BRAINLIEST


32.

name the technique used for separating of a mixture of two miscible liquids what is the principle behind this technique where does this technique find application

Answer»

The technique used depends on whether the liquids dissolve in each other, and so are miscible, or if they are immiscible. Fractional distillation is a technique used to SEPARATE liquids ACCORDING to their boiling points. CHROMATOGRAPHY is used to separate MIXTURES of coloured compounds

33.

What is meant by sublimation where does this technique to find application

Answer»

Sublimation is a PROCESS in which any solid change direct into VAPOUR on heating when we BURN CAMPHOR this process OCCUR

34.

what is the principle of centrifugation technique which kind of mixture can be separated by using this technique

Answer»

The PRINCIPLE. is
due to high force of spinning
the denser PATRICK HAST stay at bottom and lighter PARTICLES COMES on top

35.

What is the need of operating the components of a mixture

Answer»

COMPONENTS of a solution composed of a non-volatile solid SOLUTE and a liquid solvent can be separated by distillation. Mixtures of liquids with reasonably different boiling POINTS can also be separated by distillation. Solutions with SEVERAL components can be separated by paper or thin-layer

36.

Concept of gibbs free energy entropy and enthalpy in protein

Answer»

The components of the CHANGE in Gibbs FREE energy are different, however. As water freezes, the water molecules become more ordered and so the entropy change is negative. ... INTERACTIONS between BIOLOGICAL molecules that occur spontaneously can also be driven either by entropy or enthalpy.

Pls vote

37.

Plz give its iupac name

Answer» UREA.The ANSWER is Urea
38.

Derive relationship between molality, molarity and density?

Answer» RELATIONSHIP between MOLARITY, MOLALITY and density:
Density = Molarity/Molality
Given Molarity = 12.5 mol/vol(CC) and Molality = 11.5 mol/mass (grams)
Density = [12.5 mol/vol(cc)] /[11.5 mol/mass (grams)]
Density = 1.087 grams/cc
39.

What are the elements that make up Plastic?

Answer»

The term “plastics” includes materials composed of VARIOUS elements such as CARBON, hydrogen, oxygen, nitrogen, chlorine, and sulfur. Plastics typically have high molecular weight, meaning each MOLECULE can have thousands of atoms bound TOGETHER.

40.

Anyone give the iupac name of it

Answer»

3,3,5 TRI METHYL hex -1- ene 2 -OL

41.

Calculate mass of potassium sulphate recquired to prepare 10%of solution in 10g

Answer»

Your ANSWER is COMPLETE.

42.

Latan heat of fusion meaning

Answer»

The LEAST AMOUNT of HEAT REQUIRED for the FUSION

43.

What is the colour of iron

Answer»

Iron is ACTUALLY FOUND in grey or silver but DUE to rusting ot TURNS INT reddish-brown

44.

Inhibition of sodium potassium atpasedifference between radish and horseradish

Answer»

LOW in calories but DENSER than red radishes, horseradish is very high in vitamin C (for IMMUNITY, collagen formation, energy, the NERVOUS ...

45.

In fireworks the green flame is due to presence of

Answer»

Different chemicals are used in FIREWORKS which give them different colours. The green colour that we see in the fireworks is due to the presence of barium Chloride (BaCl2).

This is based on the phenomenon of incandescence, which is the phenomenon by which elements emit different colours on HEATING (just like IRON turns RED on being heated and then white-hot as the temperature rises).


46.

Why is acetic acid called as weak acid do there are four hydrogen atoms in its one molecule

Answer»

Because it do not RELEASE more H +ve IONS when DISSOLVED

47.

Chemical equation for change in energy

Answer»

So BORING I HATE SCIENCE

48.

Chemical equation of change in colour

Answer»

Hi friend .....

There are certain chemical REACTIONS which are accompanied with change in color of the products.....

here is the example....

when crystal of copper carbonate, which are in green in color, are heated strongly then it forms a black compound of copper oxide off carbon dioxide GAS...
HERE IS EQUATION....

CuCO3--------}CuO+CO2

I HOPE I HELPED YOU....

PLEASE MARK IT AS BRAINLIST IF IT'S HELPFUL.....

49.

Inportant questions on acid base and salt for 0

Answer»

How it changes the red litmus paper to BLUE litmus paper
METHYL ORANGE
phenopthalin

50.

please help me this question it is very important please give me.my question is give a balance equation for reaction of nitrogen dioxide.

Answer»

N2+2O2->2N02






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