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.

What is percentage labelling of oleum solution?​

Answer»

Explanation:          OLEUM is mixture of H2SO4 and SO3. Labelling of oleum is done for 100 gm sample. ... 109% oleum means 100g is the sample and 9g is the WATER required by sample to COMPLETELY combine SO3 in the sample. And according to REACTION 9g water combines with 40g SO3 and hence in 100g sample 40g is SO3 and 60g is H2SO4.

2.

A compound forms hexagonal close packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids.​

Answer»

:Total number of VOIDS = Number of tetrahedral voids = Step-by-step explanation :GIVEN that,The compound forms HCP structure.Also,An atom in hcp structure has three voids, one octahedral and the other two tetrahedral.Number of atoms in 0.5 mol = Now, we are PROVIDED that a total of three voids are present in an atom of hcp structure. ∴ Total number of voids present in atoms :-Again, we are given that two tetrahedral voids are present in an atom of hcp structure.∴ Number of tetrahedral voids :-

3.

Define an acid and give two examples each of organic acid and inorganic acid 2. Differentiate between a strong acid and a weak acid. Give two examples of each. 3. (a) What is basicity of an acid? (b). Mention four physical properties of an acid. 4. Compare and contrast the electrical conductivity of HCl and CH3COOH

Answer»

the COMPOUND that CONTAINS more number of h+ IONS is KNOWN as ACID

4.

What is sterine gas​

Answer» VINYL PHENOL...C6H5-CH=CH2
5.

Which change in pH represents a hundred fold increase in the concentration of H3O+? A.5 to 7 B.11 to 13 C.4 to 2 D.3 to 5

Answer» MAY HELP you
6.

Don't Try it from the Google do by yourself​

Answer»

okExplanation:

7.

PLEASE I NEED AN ANSWER IN 2 MINS TIME!! IT IS URGENT!. THANKS FOR YOUR UNDERSTANDING QUESTIONS 1. Define an acid and give two examples each of organic acid and inorganic acid 2. Differentiate between a strong acid and a weak acid. Give two examples of each. 3. (a) What is basicity of an acid? (b). Mention four physical properties of an acid. 4. Compare and contrast the electrical conductivity of HCl and CH3COOH

Answer»

I'll answer it as much as I can. An ACID is a chemical substance tht IONIZE in an aqueous solution to PRODUCE H+ ions organic- citric acid,oxalic acid inorganic- hydrochloric acid,nitric acid. 2) Strong acid- contains large concentration of H+ ions Ex-sulfuric,hydrochloric Weak acid- which contain less concentration of H+ ions Ex-citric acid,acitic acid... 3) the amount of OH- ions present in an acidb) show acidic property when diluted in waterlarge concentration of H+ ionssour in tasterelease hydrogen gas4) Hcl has more conductivity the acitic acid as HCL is an strong acid and contain large amount of H+ ions. I tried my best. Plz mark me as brainliest. SRY if any mistake.

8.

Give operators and operation for the following observables 1 position 2 momentum 3 potential energy 4 total energy

Answer»

potential ENERGY will react with HCL FIGHT and TOTAL energy

9.

Whit is the oxidation no. of s in h2so5​

Answer»

➖➖➖➖➖♠️ H2SO5 also KNOWN as Caro's acid.♠️ The OXIDATION STATE of S in H2SO5 is +6.♠️ H2SO5 has a peroxide bond.➖➖➖➖➖➖➖➖➖➖➖➖➖

10.

Calculate the potential of at 25°C : 1) Zn/Zn++(0.1M)//Cu++(0.01M)/Cu2)Zn/Zn++(0.5)//Ag+(0.5M)/Ag​

Answer»

2 AL0(s) + 3 Cl20(g) --> 2 Al+3Cl3-1(s) ... The shorthand notation, Zn / ZN2+(aq), 0.1 M // Cu 2+(aq), 1.0 M / Cu, means the ... CALCULATE the potential for the following cells at ...

11.

Give me some chemical equations for balancing​

Answer»

hy mate ur answer is Explanation:Example 1. C5H12 + O2 ---> CO2 + H2O. ...Example 2. ZN + HCl ---> ZnCl2 + H2 ...Example 3. Ca(OH)2 + H3PO4 ---> Ca3(PO4)2 + H2O. ...Example 4. FeCl3 + NH4OH ---> FE(OH)3 + NH4Cl. ...Example 5. S8 + F2 ---> SF6 here is the some examples of chemical reactionhope it helps umark me as brainlist answer ...

12.

R1=10 R2=6 V=79v What is the current ? The power in R1 And power in R 2 And total power

Answer»

it HELPS U my FRND

13.

When 1 mole of benzene is mixed with 1 mole of toluene (vapour pressure of benzene – 12.8 kPa, Toluene = 3.85 kPa) (a) The vapour will contain equal amount of benzene and toluene. (b) Not enough information is given for prediction. (c) The vapour will contain a higher percentage of benzene. (d) The vapour will contain higher percentage of toluene.

Answer» B is the answerhope it MAY be help you PLEASE MARK me as a brainliest please mark me and FOLLOW me
14.

A solution containing 10 g per dm3 of urea (molar mass 60 g mol-1) is isotonic with 5% solution of non-volatile solute, MB of solute is (a) 300 g mol-1 (b) 350 g mol-1 (c) 200 g mol-1 (d) 250 g mol-1

Answer»

tion:According to the equation, 10g per dm 3 of urea is isotonic with 5% solution of NON VOLATILE SOLUTE. Therefore, Molar CONC. of 5% non volatile solute= Mol wt. of non volatile soute50g/dm 3 M50 MSince we know that both solutions are isotoic to each other, hence,61 = m5 ; where m=50×6=300g/mol.

15.

The value of Henry’s constant KH is _________ .[NCERT Exemplar] (а) greater for gases with higher solubility. (b) greater for gases with lower solubility. (c) constant for all gases. (d) not related to the solubility of gases.

Answer» MARK as brainliestc) CONSTANT for all GASES
16.

An unripe mango placed in a concentrated salt solution to prepare pickle, shrivels because _________ . [NCERT Exemplar] (a) it gains water due to osmosis. (b) it loses water due to reverse osmosis. (c) it gains water due to reverse osmosis. (d) it loses water due to osmosis.

Answer»

An unripe mango PLACED in a concentrated SALT SOLUTION to prepare pickle, shrivels becauseans:- a) it GAINS water due to osmosis

17.

What is mole fraction of solute in 1.00 m aqueous solution? (a) 0.0354 (b) 0.0177 (c) 0.177 (d) 1.770

Answer»

(B) 0.0177Explanation:1.00 m AQUEOUS solution means 1 mole of solute in 1 KG of WATER.1 kg of water corresponds to 181000 =55.56 moles.The mole fraction of solute is 1+55.561 =0.0177.Hence, the correct option is B.hope it will help you and mark it as BRAINLIEST.

18.

In comparison to a 0.01 M solution of glucose, the depression in freezing point of a 0.01 M MgCl2 solution is _________ . [NCERT Exemplar] (a) the same (b) about twice (c) about three times (d) about six times

Answer»

he correct ANSWEREXPLANATION:I am SURE it will help you please MARK me as a brilliant

19.

We have three aqueous solutions of NaCl labelled as ‘A’, ‘B’ and ‘C’ with concentrations 0.1M, 0.01M and 0.001M, respectively. The value of van’t Hoff factor for these solutions will be in the order __________ . [NCERT Exemplar] (a) iA < iB < iC (b) iA > iB > iC (c) iA = iB = iC (d) iA < iB > iC

Answer»

I THINK OPTION b is correct.pls mark me down as a BRAINIEST answer!!!

20.

Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult’s law? [NCERT Exemplar] (a) Methanol and acetone. (b) Chloroform and acetone. (c) Nitric acid and water. (d) Phenol and aniline.

Answer»

a METHANOL and ACETONE

21.

Which of the following statements is false? [NCERT Exemplar] (а) Two different solutions of sucrose of same molality prepared in different solvents will have the same depression in freezing point. (b) The osmotic pressure of a solution is given by the equation π = CRT (where C is the molarity of the solution). (c) Decreasing order of osmotic pressure for 0.01 M aqueous solutions of barium chloride, potassium chloride, acetic acid and sucrose is BaCl2 > KCl > CH3COOH > sucrose. (d) According to Raoult’s law, the vapour pressure exerted by a volatile component of a solution is directly proportional to its mole fraction in the solution.

Answer» DEPRESSION in freezing depends on CONCENTRATION (molarity) of solution and also on solvent taken.ΔT =(K f)× molarity ↘ depends on solvent takenSo, option (A) is a wrong statementExplanation:PLEASE mark my answer as a BRAIN list and also follow me please like it if it helped you...
22.

Which of the following aqueous solutions should have the highest boiling point? [NCERT Exemplar] (a) 1.0 M NaOH (b) 1.0 M Na2SO4 (c) 1.0 M NH4NO3 (d) 1.0 M KNO3

Answer»

(a)EXPLANATION:you can FIND explanation on VEDANTU APP

23.

What is chemistry? Why it is important in our daily life?

Answer»

The BRANCH of SCIENCE that DEALS with the STUDY of chemicals and it's chemical effect

24.

Calculate the percentage of platinum in ammonia chloroplatinate (NH4)² P+Cl6

Answer» 6%EXPLANATION:
25.

Calculate the energy of one of the photons if beam of light having wavelength 25.0um

Answer»

4.325 ×10^-3 ELECTRON volt.Explanation:

26.

Cone. H2SO4 is 98 % H2SO4 by mass has d = 1.84 g cm-3. Volume of acid required to make one litre of 0.1 M H2SO4 is (a) 5.55 mL (b) 10 mL (c) 20 mL (d) 30 mL

Answer»

Kaun H2S 404 is 98% H2 s04 by mass at d equal to 1.84 GRAHAM - 3 volume of acid REQUIRED to make 1 cube of litre 0.1 H2 s o4 is equal to 5.5 because 1.84 gram equal to 5.55

27.

Consider the figure and mark the correct option. [NCERT Exemplar] (a) water will move from side (A) to side (B) if a pressure lower than osmotic pressure is applied on piston (B). (b) water will move from side (B) to side (A) if a pressure greater than osmotic , pressure is applied on piston (B). (c) water will move from side (B) to side (A) if a pressure equal to osmotic pressure is applied on piston (B). (d) water will move from side (A) to side (B) if pressure equal to osmotic pressure is applied on piston (A).

Answer» OPTION D is the ANSWER of this
28.

Define reversible and irreversible change

Answer» REVERSIBLE CHANGE is a change that can be reversed i. e. PHYSICAL CHANGES. Irreversible change is a change that cannot be reversed i. e. chemical changes. Hope it will help you.. MARK the brainliest
29.

What happens when? (Give only the balanced equations of the reactions). i. A small piece of Mg ribbon is added to the aq. Solution of FeSO4​

Answer»

Ferrous sulfate is FeSO4•nH2O, where n is 1, 4, 5, 6 or 7. Since 1, 5 and 6 are rare, I will use n = 7. Then,Mg + FeSO4•7H2O = MgSO4•7H2O + FeChange in FREE Energy: ΔG(20C) = -361.5kJ (NEGATIVE, so the REACTION runs)Change in Enthalpy: ΔH(20C) = -374.1kJ (negative, so the reaction is exothermic)NOTE: MgSO4•7H2O is COMMONLY called Epsom salt.Hope your doubt is clear plz mark as brainliest

30.

Q2. Name the substance oxidized and the substances reduced and also identify the oxidizing agents and reducing agents in the following reactions. a. 3MnO2 + 4Al -> 3Mn + 2Al2O3 b. SO2 + 2H2S --> 3S + 2H2O

Answer»

it HELPS U my FRND

31.

Who introducted the concept of hyberidisation of orbital​

Answer»

Scientist Pauling INTRODUCED the concept of HYBERIDISATION of orbital.hope it helps you....please mark it as a BRAINLIST answer....also please rate and follow me....stay home stay SAFE....

32.

What is decomposition reaction explain its types with relevant equation ​

Answer»

Decomposition REACTIONS are also known as analysis reactions or chemical breakdowns. The opposite of this type of reaction is a synthesis, in which simpler reactants combine to form a more complex product.You can recognize this type of reaction by looking for a single reactant with multiple products.In certain circumstances, decomposition reactions are undesirable. However, they are intentionally caused and analyzed in mass spectrometry, gravimetric analysis, and thermogravimetric analysis.Decomposition Reaction ExamplesWater can be SEPARATED by electrolysis into hydrogen GAS and oxygen gas through a decomposition reaction:2 HAnother EXAMPLE of this type of reaction is the spontaneous decomposition of hydrogen peroxide into water and oxygen:2 HThe decomposition of potassium chlorate into potassium chloride and oxygen is yet ANOTHER example:2 KClO.

33.

Write two observation you make when quick lime is added to water​

Answer»

The following TWO observations we would make when quicklime is ADDED to water: (i) A hissing sound is observed. (ii) The mixture starts boiling and lime water is OBTAINED. 1) the PRODUCT will be calcium hydroxideExplanation:

34.

Plz answer Question 4,5,6,​

Answer»

hi I am a i saw this looby is a RA a ra DHANUSH is a great time in the future and I have to be in a ra dhanush a ra dhanush I have a ra I will beExplanation:kind attn Mr Rajesh Kumar PLEASE I NEED a great day ahead with the keys will play a role for a great time y

35.

What is the only positive ion found in a solution of phosphoric acid?

Answer»

Phosphoric Acid is a colorless, odorless phosphorus-containing inorganic acid. Phosphoric acid is a sequestering AGENT which binds many divalent CATIONS, including Fe++, Cu++, Ca++, and Mg++. Phosphoric acid is used in DENTISTRY and orthodontics as an etching solution, to clean and ROUGHEN the surfaces of teeth where dental appliances or fillings will be placed. In addition, phosphoric acid is a constituent in bone and teeth, and plays a ROLE in many metabolic processes.Hope it helps you Mark me BRAINLIEST

36.

When a chalk is heated it produce magnacium powder ​

Answer»

tion:it cannot PRODUCE magnesium powder it GIVES red COLOR that time beating that time it produce magnesium

37.

To which group and perioud does carbon belong​

Answer» HEY MATE!!❤ᴄᴀʀʙᴏɴ ʙᴇʟᴏɴɢs ᴛᴏ sᴇᴄᴏɴᴅ ᴘᴇʀɪᴏᴅ ᴀɴᴅ ɢʀᴏᴜᴘ. sɪʟɪᴄᴏɴ ʙᴇʟᴏɴɢs ᴛᴏ ᴛʜɪʀᴅ ᴘᴇʀɪᴏᴅ ᴀɴᴅ ɢʀᴏᴜᴘ . ɪғ ᴀᴛᴏᴍɪᴄ ɴᴜᴍʙᴇʀ ᴏғ ᴄᴀʀʙᴏɴ ɪs , ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ɴᴜᴍʙᴇʀ ᴏғ sɪʟɪᴄᴏɴ ɪs : ᴀ .h☺pe it HELPS!!❤@brainly.in♡♡SRITI♡♡
38.

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to _________ .[NCERT Exemplar] (a) low temperature (b) low atmospheric pressure (c) high atmospheric pressure (d) both low temperature and high atmospheric pressure

Answer»

centration of oxygen in the BLOOD and tissues of PEOPLE LIVING at HIGH ALTITUDE is due to _________ .) low atmospheric pressure

39.

0.64g of gas occupies a volume of 224 mL at STP. The gas could be?

Answer»

SO2Explanation:0.64 G of GAS =224ml=1/100 molHus 1 mol of gas=0.64×100=64gThis gas could be SO2

40.

Plz answer it fast.Both 1 and 2 question​

Answer»

I DNT KNOW itExplanation:MARK me as BRAINLIEST GUY....❤❤

41.

How much water should be added to 500 ml of a 5m solution to get a 2m solution?

Answer» 200 mlExplanation:=500*2/5= 200 ML
42.

Identify the type of reaction and balance the equations. a. BaCl2 + Na2SO4 -->NaCl + BaSO4 b. Pb(NO3)2 -->PbO + NO2 +O2 c. K + CuSO4-->K2SO4 + Cu

Answer»

a) DOUBLE displacement reactionb) decomposition reactionc) displacement reactionExplanation:hope it helps youplzzzz mark as brainliest ANSWER PLZZZ PLZZZZZZZZZZZZZ

43.

DistinguishbetweenMetalandIsotopes ?​

Answer»

magine a pair of identical twins. These twins have the same temperament, and since they're identical, it is very hard to tell them apart unless you examine them closely. When it is time for their annual physical, the twins need to step on a weighing scale, and when they do, one weighs slightly more than the other. In terms of chemistry, we can say that these twins are like isotopes of each other.Atoms and ELEMENTS are made of protons, neutrons and electrons. The nucleus is made of protons and neutrons, and the electrons surround the nucleus, as shown in the illustration below. The sum of the number of protons and the number of neutrons is equal to the atomic mass.Most metals are hard, shiny, they feel heavy and they melt only when they are heated at very high temperatures . Lumps of metal will make a bell-like SOUND when they are hit with SOMETHING heavy (they are sonorous). Heat and electricity can easily pass through a metal (it is conductive). A lump of metal can be beaten into a thin sheet (it is malleable) or can be pulled into thin wires (it is ductile). Metal is hard to pull apart (it has a high tensile strength) or smash (it has a high compressive strength). If you push on a long, thin PIECE of metal, it will bend, not break (it is elastic). Except for cesium, copper, and gold, metals have a neutral, silvery color.Not all metals have these properties. Mercury, for instance, is liquid at room TEMPERATURE, Lead, is very soft, and heat and electricity do not pass through iron as well as they do through copper.

44.

What is the change in the kinetic energy with respect to temperature​

Answer»

hy DUDE ur answer is Explanation:Kinetic ENERGY is proportional to the SPEED of the molecules. As the speed of the colliding molecules increases, so does the total kinetic energy of all the gas molecules. ... As the gas molecules GAIN energy and move faster, the temperature goes up.hope it helps umark me as brainlist answer

45.

Silicon has the same type of macro molecular structures as diamond . Explain why one atom of either element can form four covalent bonds

Answer»

HiExplanation:

46.

Define isomerization.....​

Answer»

Explanation:In CHEMISTRY isomerization is the process by which ONE molecule is transformed into another molecule which has exactly the same atoms, but the atoms have a DIFFERENT arrangement e.g. A-B-C → B-A-C (these RELATED molecules are known as isomers [1]). In some molecules and under some conditions, isomerization occurs spontaneously.

47.

4L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is ________ .[NCERT Exemplar] (a) 0.004 (b) 0.008 (c) 0.012 (d) 0.016

Answer»

(C) 0.012 is the ANSWEREXPLANATION:HOPE OT HELPS

48.

Percentage of carbon in 55% pure sample of carbon carbonate

Answer»

6.6 %EXPLANATION:Let mass of sample is 100 GM, mass of aCO3=55gmmass of C = 12× 55/100 = 6.6 gmSo, % of C in sample = 6.6%HOPE THIS HELPS YOU¶ THANK YOU ¶PLEASE MARK AS BRAINLIEST ™®

49.

Find the number of hydrogen atoms in 4g of ch4 Detailed solution pls

Answer»

: 6 x 10²³( nearly)See the ATTACHED image that may HELP you¶ THANK YOU ¶PLEASE MARK AS BRAINLIEST ™®

50.

Small anodic area will result in intense corrosion

Answer»

• The rate of the corrosion is greatly influenced by the RELATIVE SIZES of cathodic and anodic areas. • If the metal has smaller the anodic area and LARGER the cathodic area exposed to corrosive atmosphere, more intense and faster is the corrosion occurring at anodic area because at anode OXIDATION takes PLACE and electrons are liberated .