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.

Two liquids A and 5 boil at 145 °C and 190 °C respectively. Which of them has a higher vapour pressure at 80 °C?

Answer» LIQUID A has higher vapur pressure at 80oC because of its LOWER BOILING POINT.
2.

Common salt is non-electrolyte. [True/False]

Answer»

Glucose (sugar) readily dissolves in WATER, but because it does not dissociate into ions in solution, it is considered a nonelectrolyte; SOLUTIONS CONTAINING glucose do not, therefore, conduct electricity. “nonelectrolyte.” “solute.” “salt.” MARK ME AS BRAINLIEST

3.

State the main advantage of molality over molarity as the unit of concentration. [DoE]

Answer» MOLARITY is number of MOLES PER unit volume of the solution and molality is number of moles per unit mass of solvent. Volume is temperature dependent where as mass is constant at all TEMPERATURES. So, molality remains constant but molarity changes with temperature. Hence , molality is PREFERRED over molarity.hope it helps you...mark it as brainliest...
4.

Name the elements which occurs in both native and combined states ??

Answer» ANTIMONY, arsenic, BISMUTH, cadmium, CHROMIUM, COBALT, indium, iron, nickel, SELENIUM, tantalum, tellurium, tin, titanium, and zinc.Explanation:
5.

Identify the substance oxidised and reduced in the following reaction . 1) Mno2+4HCL_ heat Mncl2+Cl2+2H2o

Answer»

tion:In GIVEN REACTION Magnese (MG) is reduced while H2 is oxidised it is also called redox reaction

6.

Number of water molecules lost if 2.00g hydrate became 1.00g anhydrous sulfate

Answer» ANSWER is 3.34 * 10^23Explanation:REFER ATTACHMENT for EXPLANATION!!
7.

Who to calculat avagadors no​

Answer»

154×10 23 MARK as BRAINLIST

8.

when 2 gram of nahco3 is added to solution Ch3cooh weighing 10 gram it is observed that 2.2g of co2 is released to the atmosphere the Residue found to weigh 12.0 g show that these observations are in the agreement with law of conservation of mass​

Answer» MAY HELP you
9.

When was mordern periodic table was proposed?no spamming...use only English....​

Answer»

Periodic Law : This law was given by HENRY Moseley in 1913.It states that “Properties of the elements are the periodic function of their ATOMIC numbers”.According to this elements should not be arranged according to their masses but should be arranged according to atomic NUMBER (no. of PROTONS) which is more appropriate way.

10.

A major textile dye manufacturer developed a new yellow dye. The dye has a percent composition of 75.95% C, 17.72% N, and 6.33% H by mass with a molar mass of about 240 g/mol. Determine the molecular formula of the dye.

Answer»

ercentage composition:C = 75.95%N = 17.72%H = 6.33% Molar mass = 240 gmTo Find:The molecular formula of the dye.Calculation:- Let the mass of compound be 100 gm.⇒ Mass of C = 75.95 gm⇒ Mass of N = 17.72 gm⇒ Mass of H = 6.33 gm - No of moles:C = 75.95/12 = 6.33N = 17.72/14 = 1.27H = 6.33/1 = 6.33- Simplest ratioC = 6.33/1.27 = 4.98 ≈ 5N = 1.27/1.27 = 1H = 6.33/1.27 = 4.98 ≈ 5- Empirical formula = C5NH5- Empirical formula mass = 12 × 5 + 14 + 1 × 5 = 79 gm- n = Molar mass/ Empirical formula mass ⇒ n = 240/79 = 3.04 ≈ 3- Molecular formula = Empirical formula × n⇒ Molecular formula = C15N3H15(Note: The molar mass given is approximate. ACTUAL molar mass is 237 gm/mol)

11.

What is the action of HCL on propan 2 ol​

Answer»

Let us consider the reaction of propene with hydrogen CHLORIDE. The PROTON of a strong acid HCl MAY add to a double bond to yield a carbocation. This proton attaches itself to the LESS substituted carbon. As a consequence, the halogen ends up at the more substituted carbon.Hope this helps Plz mark as BRAINLIEST

12.

Help me please if you can :/

Answer» 4. electrolyte3. 7 PH ( sugar cannot ALTER the pH of the solution show the pH of the solution will be the pH of the WATER (7- 8.5)
13.

What should be the valency of Manganese written Class 10th boards? Answer properly and i'll mark you the BRAINLIEST!​

Answer» SE MN 2+Valency or the CHARGE of MANGANESE
14.

5. How many optical isomers in metal complex [Co(en)2 Cl2]+ ? also draw the structures of isomers.

Answer»

Two Explanation:There are two geometrical ISOMERS of [ co(en)2 cl2]+ ( cis and TRANS ). Only cis isomer shows optical isomers while trans does not. Trans isomer does not geometrical isomer . Please SEE the attachments for further INFORMATION

15.

Differentiate between three States of matter on the basis of kinetic molecular theory​

Answer»

Solid particles have the least amount of energy, and GAS particles have the GREATEST amount of energy. The TEMPERATURE of a substance is a MEASURE of the average kinetic energy of the particles. A change in phase MAY occur when the energy of the particles is changedExplanation:

16.

Ethylene glycol is used as _________ .

Answer» HI friendExplanation:ethylene glycol is used as ANTI freezehope this helped youmark it as BRAINLIST....
17.

The molal elevation constant depends upon (a) nature of solute. (b) nature of the solvent. (c) vapour pressure of the solution. (d) enthalpy change.

Answer»

your ANSWER is : NATURE of solute.Explanation:HOPE HELP you

18.

People add sodium chloride to water while boiling eggs. This is to (a) decrease the boiling point. (b) increase the boiling point. (c) prevent the breaking of eggs. (d) make eggs tasty.

Answer» PREVENT the BREAKING of EGGS
19.

Vapour pressure is _________ proportional to temperature.

Answer» INVERSELY is the CORRECT ANSWER
20.

The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows (a) no deviation from Raoult’s Law. (b) positive deviation from Raoult’s Law. (c) negative deviation from Raoult’s Law. (d) that the solution is unsaturated.

Answer» B is the ANSWER BROUGHT to me in
21.

Which relationship is not correct?

Answer» B is not the CORRECT ANSWER
22.

Osmotic pressure of a solution is 0.0821 atm at a temperature of 300 K. The concentration in moles/litre will be (a) 0.33 (b) 0.666 (c) 0.3 × 10-2 (d) 3

Answer» TION:The CONCENTRATION of SOLUTION in moles/litre will be. check-circle. TEXT Solution. 0.33.
23.

Which of the following condition is not satisfied by an ideal solution? (a) ΔHmixing = 0 (b) ΔVmixing = 0 (c) Raoult’s Law is obeyed (d) Formation of an azeotropic mixture

Answer»

option DEXPLANATION:For an IDEAL solutionΔ mixing H=0 ;Δ mixing V=0 andit should OBEY RAOULT's law.HOPE THIS HELPS YOU¶ THANK YOU ¶PLEASE MARK AS BRAINLIEST ™®

24.

All intravenous injections must be isotonic with body fluids. [True/False]

Answer» TRUE EXPLANATION:because of this APP I have a SAA in my SWEAT
25.

The process used for desalination of water is _________ .

Answer» BOILING and re-condensationExplanation:
26.

What do you mean by reactivity series of metal?

Answer»

.....Here's your answer...The ACTIVITY series (also known as reactivity series) of METALS is a series in which metals arranged in the decreasing order of reactivity. THUS the most reactive METAL is placed at the TOP of the series while the least reactive metal is placed at the bottom of the series.kindly mark me Brainliest

27.

The van’t Hoff factor (i) accounts for (a) degree of solubilisation of solute. (b) the extent of dissociation of solute. (c) the extent of dissolution of solute. (d) the degree of decomposition of solution.

Answer»

bExplanation:it TELLS US about DEGREE of dissociation and ASSOCIATION

28.

Which has the lowest boiling point at 1 atm pressure? (a) 0.1 M KCl (b) 0.1 M Urea (c) 0.1 M CaCl2 (d) 0.1 M A1Cl3

Answer»

a.0.1.M.KCl has LOWEST BOILING POINT at 1 ATM

29.

A solution is prepared by the resolving to 24.5 gram of Sodium Hydroxide is used in water to give 1l solution the molarity of the solution

Answer»

Given W NAOH =24.5 GNO. of MOLES of NaOH= 4024.5 moles=0.6125 moles∴ Molarity of SOLUTION= 1 L0.6125 moles =0.6125 M

30.

When the evacuated tube of volume 400 is filled with a gas at 300k and 101kpa the mass of tube is 0.65g what could be the identity of gas?

Answer»

Explanation:P volume = 0.112 L volume = 0.112 Lpressure = 3.75 atm volume = 0.112 Lpressure = 3.75 atmtemp = 273K volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas LAW is PV=nRT volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×273 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 moles volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 23 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 23 atoms or molecules of the pure SUBSTANCE being measured volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 23 atoms or molecules of the pure substance being measuredno. of molecules =0.01874×6.022×10 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 23 atoms or molecules of the pure substance being measuredno. of molecules =0.01874×6.022×10 23 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 23 atoms or molecules of the pure substance being measuredno. of molecules =0.01874×6.022×10 23 =112.5×10 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 23 atoms or molecules of the pure substance being measuredno. of molecules =0.01874×6.022×10 23 =112.5×10 20 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 23 atoms or molecules of the pure substance being measuredno. of molecules =0.01874×6.022×10 23 =112.5×10 20 volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 23 atoms or molecules of the pure substance being measuredno. of molecules =0.01874×6.022×10 23 =112.5×10 20 HENCE, the CORRECT option is C volume = 0.112 Lpressure = 3.75 atmtemp = 273Kgas law is PV=nRTn= 0.0821×2733.75×0.112 n=0.01874 molesA mole has 6.022×10 23 atoms or molecules of the pure substance being measuredno. of molecules =0.01874×6.022×10 23 =112.5×10 20

31.

4) The electronic configuration of an element is 2, 8, 8, 2. This element belongs to a) 1st group b) 2nd group c) 3rd group d) 4th group

Answer» 2ND groupthis is ANSWWR
32.

Give one use of iofine​

Answer»

Hello mate,I think you mean Iodine.....Explanation:So here is your answer,Iodine reduces thyroid hormone and can kill fungus, bacteria, and other MICROORGANISMS such as amoebas. A specific kind of iodine called potassium IODIDE is also used to treat (but not PREVENT) the effects of a radioactive accident.Plz mark me BRAINLIEST.....!

33.

Guys I'm asking this question for 3rd time please answer me fast pls don't spam​

Answer»

hen no ions are produced, or the ION content is low, the solute is a non-electrolyte. Non-electrolytes do not CONDUCT electricity or conduct it to a very SMALL degree. In an aqueous solution a strong electrolyte is considered to be completely ionized, or dissociated, in water, MEANING it is soluble.Soits regarded as WEAK electrolyte.

34.

In which atom both number of protons and neutrons are equally present?no spamming...​

Answer»

HELIUMExplanation:HELIUM has 2 PROTONS and 2 neutrons.Thank you

35.

How to defferentiate diamond and graphite​

Answer»
36.

Please give me correct answer it is urgent​

Answer»

a) is Wurtz reaction in  substitute "cl" with "i" in the reactant  B) is Swarts reaction substitute "br" with "f"  in the reactant  EXPLANATION:a),b) The reason for the above reaction is we cannot prepare the fluorine and iodine halocompounds directly beacuse of its ELECTRONEGATIVITY and reactivity respectively for f and i so we carry out the reaction of fluorine and iodine with already prepared haloalkanes to get the fluorine and iodine derivatives.10.18And answer for your q 10.18 p dicholorobenzene  has a GREATER melting point because of its symmetrical nature and  for stable LATTICE so that lattice enthalpy is higher  and even its melting point is higher do refer solid state for better clarification

37.

Pls answer Ques.6. Class 10

Answer» MAY be A OPTION is the CORRECT ANSWER.
38.

In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. (a) 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 and reason both are incorrect statements. (e) Assertion is wrong statement but reason is correct statement. Assertion: When methyl alcohol is added to water, boiling point of water increases. Reason: When a volatile solute is added to a volatile solvent elevation in boiling point is observed. [NCERT Exemplar]

Answer» BHAI SORRY I don't no YANI KI MUJHE
39.

Note: In the following questions two or more options may be correct. Benzoic acid, when dissolved in benzene, which of the following is correct. [NCERT Exemplar] (a) The benzoic acid will undergo dissociation. (b) The benzoic acid will undergo association. (c) Observed molar mass of benzoic acid in benzene will less than normal molar mass. (d) Observed molar mass of benzoic acid in benzene is more than normal molar mass.

Answer»

π = ICRT = i nVRT 5.73 = i × 5/1220.1 × 0.0821 × 283 i = 0.6017 α = 1 - i1 - 1/n = 1 - 0.60171 - 1/2 = 0.8 % association = 80%

40.

Match the items given in Column I with the type of solutions given in Column II. [NCERT Exemplar]

Answer»

a-vi) b-iii) c-iv) d-ii)e-i)

41.

Which has the highest freezing point? (a) 1 M glucose (b) 1 M NaCl (c) 1 M CaCl2 (d) 1 M AlF3

Answer»

tion:1M NaCl=2 2∆Tf 1MkCl=2 electrolyted.option-(A)

42.

The temperature at which 10% aqueous solution of (W/V) of glucose will show the osmotic pressure of 16.4 atom is (R = 0.082 L atom K-1 mol-1) (a) 360°C (b) 180 K (c) 300 K (d) 360 K

Answer» RECT answer is (d) 360 K. Explanation: We know that the molecular mass of glucose is 180 x  kg. While p is 16.4 so USING the formula PV = W/M RT.   Replacing this with the given values in the question we get 360 K. The UNIT of W/M needs to be used here for SPECIFICATIONS. This pressure represents the flow of any solvent through a specific material.
43.

Note: In the following questions two or more options may be correct. Which of the following is correct. [NCERT Exemplar] (a) KJJ increases with increase in temperature (KH is Henry’s law constant). (b) Solubility of gas in liquid decreases with increases in temperature. (c) KJJ decreases with increase in temperature. (d) Solubility of gas in liquid increases with increase in temperature.

Answer»

(a) and (d) EXPLANATION:FIRST and FORTH

44.

At 100°C, the vapour pressure of a solution of 6.5 g of solute in 100 g of water is 732 mm. If Kb is 0.52 K/m, the boiling point of solution will be [HOTS] (a) 102°C (b) 103°C (c) 101 °C (d) 100°C

Answer»

At 100°C the vapour PRESSURE of a solution of 6.5 g of a SOLUTE in 100 g water is 732 MM. If KB = 0.52, the boiling point of this solution will ...

45.

If molality of dilute solution is doubled, the value of molal depression constant (Kf) will be (a) halved (b) tripled (c) unchanged (d) doubled

Answer»

(a). HOPES ITS HELP U MARK IT AS A BRAINLIST ANSWER . FOLLOW ME . RATE THIS ANSWER .

46.

Mole fraction of glycerine C3H5(OH)3 in solution containing 36 g of water and 46 g of glycerine is (a) 0.46 (b) 0.40 (c) 0.20 (d) 0.36

Answer»

22-Nov-2019 · 1 answerMole FRACTION of C3H5(OH)3 in a SOLUTION of 36 G of WATER and 46 g of glycerine is:

47.

Note: In the following questions two or more options may be correct. Relative lowering of vapour pressure is a colligative property because ________ . [NCERT Exemplar] (а) It depends on the concentration of a non electrolyte solute in solution and does not depend on the nature of the solute molecules. (b) It depends on number of particles of electrolyte solute in solution and does not depend on the nature of the solute particles. (c) It depends on the concentration of a non electrolyte solute in solution as well as on the nature of the solute molecules. (d) It depends on the concentration of an electrolyte or nonelectrolyte solute in solution as well as on the nature of solute molecules.

Answer»

a, CEXPLANATION:these are the pptys DEPENDS on no:of PARTICLES and not on their NATURE

48.

Which of the following is incorrect for an ideal solution? (a) ∆Hmix =0 (b) ∆Vmix = 0 (c) ∆P = Pobs – Pcalculated = 0 (d) ∆Gmix = 0

Answer»

Which one of the following is incorrect for ideal SOLUTION? (a) ΔHmix = 0 (B) ΔUmix = 0 (c) ΔP = Pobs - Pcalculate by Raoult's law = 0 (d) ΔGmix = 0Correct OPTION (d) ΔGmix = 0 EXPLANATION : For an ideal solution, More

49.

Why matter offer resistance

Answer»

Matter is anything that OCCUPIES space and has mass like solids, LIQUID and gases. Resistance is the FORCE OFFERED by a substance in an direction opposite. SINCE matter has mass, it can come in contact with other matter of specific mass and will offer resistance to it.

50.

How we can calculate volume by volume of aqua solution is 7%(hcl) ​

Answer»

hope it helps you✌✌✌✌✌✌✌✌✌✌✌✌✌✌✌✌✌ ✌✌✌✌✌Explanation:DIVIDE the mass of the solute by the total volume of the solution. Write out the equation C = m/V, where m is the mass of the solute and V is the total volume of the solution. Plug in the VALUES you FOUND for the mass and volume, and divide them to FIND the concentration of your solution.