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.

How much charge in Faraday is required for the reduction of 1 mol of Ag+ to Ag? [AI 2015 Guwahati]

Answer»

iday was a 547 CHARGE

2.

What are secondary cells? [AI 2014]

Answer» CELLS are in so do GO
3.

How many Faradays are required to liberate 2 moles of hydrogen gas in electrolysis of acidified water?

Answer»

ay4 FARADAY of ELECTRICITY is REQUIRED to liberate 2 MOLES of hydrogen gas.

4.

What do you mean by limiting molar conductivity?

Answer»

iting MOLAR CONDUCTIVITY of an electrolyte is defined as its molar conductivity when the concentration of the electrolyte in the solution APPROACHES zero. ... The NUMBER of IONS (responsible for carrying current) decreases when the solution is diluted or the concentration is decreased.mark as brainlistand follow me bholna mat plz

5.

How much charge in Faraday is required for reduction of 1 mole of Al3+ to AI? [AI 2015 Chennai & Trivandrum; DoE]

Answer» 3 farraday is reqiure.
6.

HCl does not give acidic solution in benzene. Why?

Answer» BENZENE are TRUE SOLUTIONS
7.

NAME THE REDUCING AGENT WHEN MANGANESE DIOXIDE REACT WITH ALUMINIUM METAL.

Answer»

iend!☺> Here's your ANSWER : The reducing agent used when MANGANESE DIOXIDE reacts with aluminium metal is aluminium powder._________________________Thank you ! ♠Doubts are most welcome :)

8.

What is primary cell? Give an example.

Answer»

tric cell that PRODUCES current by an irreversible chemical reaction is a primary cellPrimary BATTERIES are “single use” and cannot be recharged. Dry cells and (most) alkaline batteries are examples of primary batteries. The second type is rechargeable and is called a secondary battery. Examples of secondary batteries include nickel-cadmium (NiCd), lead acid, and lithium ION batteries.Alkaline batteries, mercury batteries, SILVER oxide batteries, and zinc carbon batteries are examples of primary batteries

9.

How much charge is required for the reduction of 1 mole of Zn2+ to Zn? [AI 2015 Patna]

Answer»

How MUCH charge is required for the reduction of 1 MOLE of ZN2+ to Zn?

10.

Complete: Λ° Na2SO4 =

Answer»

2NaCl+H2SO4 - 2HCL is ANSWER

11.

Which of the following has lowest temperature vapour pressure b1 number of

Answer»

Vapour pressure depends on the concentration of non-volatile solute.For Al 2 (SO 4 ) 3 , we need to consider C×i, where C=Concentrationi=VantHoffFactorHence, for Al 2 (SO 4 ) 3 , C×i=0.5×5=2.5For UREA solution, C= 60×10012×1000 =2MFor NaCl solution, C×i=1×2=2For GLUCOSE solution, C= 180×10018×1000 =1MHere, concentration of non-volatile solute is maximum for Al 2 (SO 4 ) 3 . Hence, it will have lowest vapour pressure.Explanation:Mark as brainly please.

12.

Write four differences between solid and gases on the basis their property​

Answer»

ferenciation between solid and base are FOLLWING EXPLANATION:solidThere are particles are tightly bound to each other and very close to each otherthey have fix shape and volume they are rigidparticles have high force of attraction between them GAS there particles are further APART from each other they do not have any fix shape but have volumethey are HIGHLY compressible they do not have high attraction of force between them

13.

The chemical change involving iron and hydrochloric acid illustrates a _______ reaction.

Answer»

Acid-metal REACTION

14.

At the end of chemical reactions, what is the total mass of the reatants compared to the total mass of the products? a)the product is doubled.b)the product is half the mass of the reactants.c)the mass is the same. d)the mass changes depending on the reaction.​

Answer»

iend ! ☺> Here's your answer :At the end of CHEMICAL reactions, the total mass of the reatants compared to the total mass of the products - C) the mass is the same.Reason : all chemical reactions follow LAW of conservation of mass which states that mass of reactants and products REMAINS the same.__________________________Thank you ! ♠Doubts are most welcome :)

15.

Give the decreasing order of flocculating power of the following ions in the coagulation of a negative solution Na+,Ba2+,Al3+

Answer»

Sorry bro better LUCK next time when the SHOW is going Explanation:Sorry bro better luck next time when the show is going to be a part of the DAY HAPPY diwali

16.

Zinc displace copper from copper sulphate true / false​

Answer» YES it is true that zinc DISPLACE COPPER from copper SULPHATE (aq).hope it helps you.
17.

Can Diamonds be converted into thin sheets ??

Answer»

onds cannot be CONVERTED into thin sheets because diamond is a NON metal and non metals are not MALLEABLE ...Hope it helps :)

18.

You are given three test tubes. the three test tubes contains distilled water,acidic solution and the basic solution respectively. there is only red litmus paper available in order to identify. what is there in each test tubes. how will you find out .what is in each of the test tubes NO SPAM PLEASE CHAPTER2 CLASS 10​

Answer»

first , the red litmus WONT changes in 2 test tubes . LET them 1 & 2 in the 3rd , you can observe that red litmus turns blue. it is basic & let it 3 . now you can obtain blue litmus from test tube 3 . by using that blue litmus, DIP it in test tubes 1 and 2 . now, which test tube won't change the COLOUR of litmus is water & test tube changes blue litmus to red litmus is Acid .

19.

Can acid harm the stomach​

Answer»

✨✨Yes, acid can harm stomach but it is ALSO important for digestion. ✨✨✨✨The action of acid (HCl) is protected by a THIN cover over stomach CALLED mucus.✨✨

20.

A chemical change involving a change in colour from blue to black. Pls give the chemical reaction

Answer»

Explanation:A chemical change involving a change in colour from BLUE to BLACK is NITRIC ACID

21.

Why does diffusion ouccrs faster on heating

Answer»

HEY. DUDE HERE YOUR ANSWER When the particles HEATED the kinetic energy is increased. So ,the particles moves faster when the particles moves faster then the. diffusion STARTS faster.please Don't forget to mark it as BRAINLIEST and ALSO click on a SMALL heart and follow me

22.

Define specific conductivity (specific conductance).

Answer»

I HOPE you will UNDERSTAND

23.

Fe3+(aq) + e– → Fe3+(aq), E° = +0.77 V Cl2(g) + 2e– → 2Cl–(aq), E° = +1.36 V Write the reaction which could be feasible using above half cells.

Answer»

don't knowExplanation:*Which of the following receives OXYGENATED blood from the LUNGS?*1️⃣ LEFT atrium2️⃣ Right atrium3️⃣ Left ventricle4️⃣ Right VENTRICLE

24.

E° (reduction potential) of Cu and Zn are + 0.34 V and – 0.76 V respectively. Which of them is stronger reducing agent?

Answer» CU is the ANSWEREXPLANATION:HOPE it's HELP you THANK you
25.

Represent the galvanic cell in which the reactions is Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) [Delhi 2013(C)]

Answer»

this is the ANSWER of your

26.

Write Nemst equation for the following chemical reaction: 2Cr + 3Fe2+ → 2Cr3+ + 3Fe

Answer»

2chromium+3iron(FERRUS)2 =2chromium3+3iron(FERRIS).

27.

The standard reduction potential for Zn2+(aq)/Zn(s) is – 0.76 V. Write the reactions occurring at the electrodes when coupled with NHE or SHE (standard hydrogen electrode).

Answer» HOPE it's HELP you THANK you
28.

Inert electrolyte in salt bridge reacts with solution of half cells. [True/False]

Answer» FALSE
29.

What is meant by cell constant? What is its use?

Answer»

tion:cell constant. [′sel ‚kän·stənt] (PHYSICAL chemistry) The RATIO of DISTANCE between conductance-titration electrodes to the area of the electrodes, measured from the determined resistance of a solution of KNOWN specific conductance.please markme as brainlist

30.

If E° for the reaction Fe3+(aq) + e– → Fe2+(aq) is + 0.77 V, what will be E° value for the reaction 2Fe3+(aq) + 2e– → 2Fe2+(aq)?

Answer»

1.21Explanation:2Fe3+ + FE3FE2+ Fe will react with FE3+, and gets oxidised & Fe3+gets reduced Hence, E=E0 (Fe3+) - E0 (Fe) = 0.77 - (-0.44) = 1.21pls MARK this answer as brainlieast

31.

Predict whether F2 and Na will react with one another. Give reason."

Answer» HOPE it's help you thank youExplanation:NA is a metal so loses its ELECTRONS while F2 is non-metal diatomic molecule so GAINS electrons. Hence a redox reaction occurs
32.

Consider the following diagram in which an electrochemical cell is coupled to an eletrolytic cell. What will be the polarity of electrodes ‘A’ and ‘B’ in the electrolytic cell? "

Answer» HOPE it's HELP you THANK you
33.

Which of the following does not have any unit(a) normality(b) mole fraction(c) molarity(d) none of these​

Answer»

a is the CORRECT ANSWEREXPLANATION:HOPE IT'S HELP YOU AND THANKS AGAIN FOR YOUR QUESTION

34.

Write four quantum number for Na atom

Answer»

The NUMBER of ELECTRONS of sodium atom is 11 of which 2 occupy the n=1 level, 8 occupy the n =2 level and 1 occupies the n= 3 level ACCORDING to the rule that the MAXIMUM number of electrons a level can occupy is . So the QUANTUM numbers for n = 3, l = 0, m=0, s= +/- 1/2.

35.

Calculate the mass of 112 ml of H2 of NTP . Please answer fast.

Answer»

No. Of moles= 112/22400{Since, no. Of moles=volume(in mL)/22400Since, no. Of moles= MASS of element/molecular massTherefore,mass of element=112×2/22400=0.01gHence,mass of element=0.01gramsExplanation:MAKE me BRAINLIEST

36.

A chemical change involving a change in colour from blue to black

Answer» NITRIC ACID. PLEASE MARK it BRAINLIEST
37.

A reaction is second order with respect to a reactant .How the rate of the reaction be affected if concentration of the reactant is reduced to half? ​

Answer»

A reaction is SECOND order with respect to a reactant.RATE =k[A] 2 (i) If the concentration of the reactant is doubled, the rate of reaction becomes 4 TIMES .(ii) If the concentration of the reactant is reduced to half, the rate of reaction becomes ONE fourth.

38.

Select all the correct answers. A sample of an unknown compound has a percent composition of 52.14% carbon, 13.13% hydrogen, and 34.73% oxygen. Which compounds could the sample be?

Answer»

C2H6O is the empirical FORMULA Explanation:Refer ATTACHMENT for explanation !!!

39.

A chemical change in which a change of colour takes place from blue to black.Plz write the chemical reaction.

Answer» HEY MATE HERE IS YOUR ANSWER PLZ MARK ME AS BRAINLIST THIS IS A REVERSIBLE REDOX REACTION
40.

Hlo guys what is Chandrasekhar limit 20points and follow me also​

Answer»

The Chandrasekhar LIMIT is the maximum MASS of a STABLE white dwarf star. The CURRENTLY accepted value of the Chandrasekhar limit is about 1.4 M☉ (2.765×1030 kg)......plzzz mark brainlist...

41.

Write the properties of solid state​

Answer»

the properties of a solid STATE are as follows:solid has a very strong MOLECULAR force between its molecules.SOLIDS can not flow it can only vibrate its particles.solid as a very little or no INTERMOLECULAR force between its particles.a solid has a definite shapea solid has a definite volumea solid cannot be compressed( except porus solids).Hope it helps.....PLEASE mark me as the brainliest!!!

42.

The quantity of change required to obtain 1 mole of Al from Al2O3 is _________ .

Answer»

ntity of charge required to obtain ONE mole of aluminium from Al2O3 is 3F. Al2O3 on electrolysis gives RISE to 2 Al+3 IONS and 3 O-2 ions.Hope it will help you....

43.

Assertion: Am for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. Reason: For weak electrolytes degree of dissociation increases with dilution of solution. [NCERT Exemplar]

Answer»

tion:SOLUTION : ... Molar conductivity of weak electrolytic solution increases on dilution because as we ACID excess WATER to increase the dilution degree of dissociation increasewhich LEAD to increase in number of IONS in the solution. Thus, Λm show a very sharp increases.

44.

Salt bridge completes internal circuit and prevents accumulation of charges. [True/False]

Answer» YES absoly RIGHT EXPLANATION:its TRUE
45.

Match the terms given in Column I with the items given in Column II."

Answer»

ycgvvy6g8d, eeezhw88aj38jjahzg4d888rxrxt

46.

A° for weak electrolyte is determined by _________ .

Answer» EXPLANATION:
47.

How does fractional distillation differ from simple distillation process ? Draw a labelled diagram of the apparatus used in fractional distillation.​

Answer»

In simple distillation we seprate water and substance by BOILING and CONDENSATION process .while In fraction distillationwith the heat petroleum vapour rise inside the fraction columns and cool down and condense at the different HEIGHTS and get collected in the CORRESPONDING trays. The condensed liquid is draw off at different levels in various columns. This entire process is known as fraction distillation.

48.

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. (Q.18 to Q.20) (а) Assertion and reason both are correct statements and reason is correct explanation for assertion. (b) Assertion and reason both are correct statements but reason is not correct explanation for assertion. (c) Assertion is correct statement but reason is wrong statement. (d) Assertion is wrong statement but reason is correct statement. Assertion: ECe|, should have a positive value for the cell to function. Reason: Ecathode, < Eanode . [NCERT Exemplar]

Answer»

sertion and reason are CORRECT and reason is the correct EXPLANATION of ASSERTIONCONCENTRATION of ionic solution changes on using DC current as a source of energy while on PASSING AC current concentration does not change Hence AC source is used for measuring resistances.

49.

When KMnO4 is tritrated against FeSO4.(NH4)2SO4.6H2O. What is equivalent mass of KMnO4.

Answer»

31.6/98 G= 0.322Explanation:HOPE it's HELP you THANK you for your QUESTION

50.

The standard emf of a galvanic cell involving cell reaction with n = 2 is formed to be 0.295 V at 25° C. The equilibrium constant of the reaction would be (a) 1.0 × 1010 (b) 2.0 × 1011 (c) 4.0 × 1012 (d) 1.0 × 102 [Given F = 96500 (mol-1); R = 8.314 JK-1 mol-1]

Answer» B is the CORRECT answerExplanation:HOPE it's HELP you thank you