52639 + Interview Questions in Secondary School in Chemistry

1.	Plz tell the answers
Answer» 1-c2-b3-a4-c5-c6-c7-b8-c9-d HOPE it HELPS........

Discussion

2.	Observe the name of a carbon compound given below. 2,3 - dichloro - 5 hydroxy oct - 4 - en - 1 - oic acid i) How many carbon atoms are present in the carbon compound ? ii) What are the substituents in the compound ? iii) What is the principal functional group in the compound ? iv) Is the given carbon compound saturated or unsaturated ? Justify
Answer» MANY carbon atoms are present in the carbon compound ?eightii) What are the substituents in the compound ?hydroxy(-OH), Acid(-COOH)iii) What is the principal functional group in the compound ?(-COOH)IV) Is the given carbon compound saturated or unsaturated ? Justifyunsaturated -due to the presence of double bonds

Discussion

3.	Select the correct option: (Question Number 1,2) 1.Example of amphoteric metal is: (i)Sodium (ü) Zinc (iii) Calcium (iv) Copper
Answer» Zinc is the CORRECT answer. Aluminium oxide and zinc oxide are examples of amphoteric oxides. Amphoteric oxides are those oxides which behave as acids as WELL as BASES. HOPE it will help you.. MARK the brainliest

Discussion

4.	3. A student performed an experiment to measure pressure and volume of a gas at constanttemperature and noted the following:Pressure (mm of Hg) Volume (cm)10020040Calculate the value of x and y. Which law wasused in the calculations ? Draw a suitable graph.(Ans. . = 64 cm. y = 250 mm)amnerature volume of a gas
Answer» TION:this will solve your doubtand the FIRST is case one and the write case TWO then draw the diagramif it is correct COMMENT MEIF it is wrong comment me

Discussion

5.	70 grams of metal oxide on reduction produced 54 grams of metal if atomic weight of metal is 81 valency is
Answer» TOTAL WEIGHT = 70gWeight of metal = 54gWeight of OXYGEN = 16gWeight of metal/EQUIVALENT MASS of metal = Weight of oxygen/Equivalent mass of oxygen54/M = 16/8M = 27 Valency = Molar mass / Equivalent massV = 81/27V= 3

Discussion

6.	Show that pressure is a state function for a gas obeying (P+a/v^2)V= RT
Answer» tion:hey DUDE the PRESSURE does not depend on the path how it is CARRIED...means that whatever be the method of pressure variation it would always cause the same CHANGE..

Discussion

7.	Classify the following PLASTIC MATERIALS as recyclable and non-recyclable materials: Radio or TV Cabinets Carry Bags Handles of Cooking Vessels Electric Switches and Boards Nylon Ropes Ballpoint Pens Telephone Instruments Plastic Dinner Sets Soft Toys Plastic Chairs
Answer» Radio or TV CABINETS - non - recyclable CARRY bags - recyclable HANDLES of cooking vessels - non - recyclable electric switches and boards - non - recyclable nylon ropes - non - recyclable ball point pen - non - recyclable telephone INSTRUMENTS - non -recyclable PLASTIC dinner sets - non -recyclablesoft toys - recyclable plastic chairs - non - recyclable Explanation:i think so this will help u

Discussion

8.	Observe the name of a carbon compound given below. 2,3 - dichloro - 5 hydroxy oct - 4 - en - 1 - oic acid i) How many carbon atoms are present in the carbon compound ? ii) What are the substituents in the compound ? iii) What is the principal functional group in the compound ? iv) Is the given carbon compound saturated or unsaturated ? Justify
Answer» TION:gkxgdkgkxgxkfjztdktsjydktjdtdi tisykdykdykftkdydk

Discussion

9.	If heating a water increases its entropy, then why does its vapour pressure not decrease as in the case of adding salt to water?
Answer» GsgehdjdsiExplanation:Gdgddghdhhshshs

Discussion

10.	Which stage in the life cycle of a silk moth yields silk fibres
Answer» larve STAGE SILK moth YIELDS silk FIBRES

Discussion

11.	If air contains N2 is to O2 ratio is 4 is to 1 average molecular weight of air
Answer» Approx 80% Nitrogen and 20% oxygen is present in air.Therefore,Avg MOLECULAR WEIGHT = 8014 + 2016/ 100Avg molecular weight = 1120+320/100= 1440/100=14.4 u

Discussion

12.	Why liquid ammonia is used as refr igeration
Answer» Because it GIVES COOLNESS in REFRIGERATOR.

Discussion

13.	Define gangue.( in best way)
Answer» the commercial valueless MATERIAL in which ore is found....EXPLANATION:please mark me a BRAINILIST I hope that it will HELP you......THANK you....

Discussion

14.	calculate the molarity and normality of a solution containing 5.3g of Na²Co³ in 1000g of solution .Mw.of (Na²Co³=106.0g/mol)
Answer» TION:SORRY I don't UNDERSTAND the QUESTION

Discussion

15.	The movement of air, vapours of scent and smoke is known as [ ] a) Diffusion b) Effusion c) Vaporisation d) All2. The rate of diffusion of gases is _____ than that of liquids. [ ]a) Lower b) Higher c) Moderate d) Both a and b3. What kind of solution is drinking soda ? [ ]a) Gas in liquid b) Liquid in gas c) Gas in gas d) Solid in liquid4. The forces of attraction between molecules is greatest in the _____ state [ ]a) Liquid b) Gaseous c) Solid d) All5. What is the formula of Potassium permanganate ? [ ]a) KMnO2b) KMO4c) KMnO4d) KMnO6. What do you observe after adding the KMnO4 drop to the 250 ml beaker with water ? [ ]a) There is no change in the beaker b) The water changes to pink in beakerc) Both a and b d) None7. Diffusion is possible only when particles of matter move __________ [ ]a) Continuously b) Not continously c) Constant d) All8. From the below diagram oberve where the NH4Cl ring will be formed. [ ]NH3 NH4Cl NH3a) NH3 end b) Nearly HCl end c) Middle of the tube d) All9. Give an example for liquid-liquid diffusion [ ]a) Alcohol in water b) Salt in water c) Gas in water d) Sugar in water10. How do the particles of the solid distribute the liquid ? [ ]a) Solid particles occupy the space between liquid particlesb) Liquid particles occupy the space between solid particlesc) Solid and Liquid have spacesd) None
Answer» b effusionb highera GAS in LIQUIDC SOLID C kmno4

Discussion

16.	When Ferrous Sulphate is heated strongly, a smell of burning sulphur is obtained due to formation of a. SO₂ b. SO3 c. H2S d.both SO₂ and SO3
Answer» OPTION (d) is CORRECT ANSWER. Explanation: Plzzzzz MARK me BRAINIEST!

Discussion

17.	In the fountain experiment, dry hcl gas is filled in the round bottom flask
Answer» tion:Demonstration: TAKE a dry round bottomed flask filled with dry HCl gas. Fix a two holed rubber cork on the mouth of round bottomed flask. ... It creates a low pressure inside the flask. But the pressure out side the flask being higher, pushes the blue litmus solution inside the flask with a great force and form a fountain.HCl gas PRESENT in the flask dissolves in water due to high solubility, creating a partial VACUUM in the flask. The outside pressure being higher pushes HCl gas present in the flask dissolves in water due to high solubility, creating a partial vacuum in the flask. The outside pressure being higher pushes the water up the jet TUBE which EMERGES as fountain.hope it's help mark as brainliest

Discussion

18.	Name the following hydrocarbons. i) C4H10 ii) C5H10 iii) C3H4 iv) C2H4
Answer» tion:1.butane2.pentene3.propyne 4.ethyne

Discussion

19.	The followingversion5. How will you(write appropriatebring aboutreactions).a.) ethanol to lodo ethane
Answer» I don't knowwwwwwwwwwExplanation:I don't knowwwwwwww

Discussion

20.	Give few uses of polythene
Answer» POLYTHENE is a multimolecular structure.It has infinite chains of ETHENE molecule.That's why it has very high tensile strength.Some uses of polythene are :-Polythene in the form of POLY bags are widely used across the world for carry rations, goods, etc.Polythene is used to pack the dry fruits, mixtures, breads, butter , etc.Polythene are used for coversheet as they are not harmed in sunlight, rain etc.They don't get wasted for hundred of years , that's why foods are also preserved .They are of micrometre width but can carry heavy weights.They are also used in automobile at higher rates.They are used for MAKING roof tops, shades, etc.They are used for making, glasses, plates, etc.But, polythene are harmful for ENVIRONMENT as the cattles eat them and get choked and die.They produce pollution on burning them.They are non biodegradable and thus harmful.

Discussion

21.	Short note on Rutherford atomic theory
Answer» According to the Rutherford atomic MODEL: The positively charged PARTICLES and most of the MASS of an atom was concentrated in an extremely small volume. He called this region of the atom as a NUCLEUS. Rutherford model proposed that the NEGATIVELY charged electrons surround the nucleus of an atom.now give me brainlist please

Discussion

22.	Give few uses of backlite
Answer» Uses of Bakelite are It is used to make handles of cooking UTENSILS as it is a INSULATOR of heat it is used to make electrical APPLIANCES etchope this helps youif it helped you please follow me and MARK as brainlist!!

Discussion

23.	In fifth group elements which have greater tendency to form multiple bonds
Answer» HII matenitrogen is UR ANSWER

Discussion

24.	Write the structure of a nitrogen molecule, how many bonds are present in it?why?
Answer» - NITROGEN Nitrogen exist as a linear, DIATOMIC, inert gas. It is an inert gas because its bond dissociation enthalpy is so high.There are THREE bonds in nitrogen molecule . So, the degree of in SATURATION is two . Its structure is in the attachment.Why it has three bonds ?In nitrogen, the number of electrons in bonding molecular orbital is six greater than that of antibonding molecular orbital . and, we know bond order = 1/2 ( diff. of no. of electrons in two ORBITALS ) = 1/2 (6) = 3.

Discussion

25.	Question No.5 In Dumas method for estimation of nitrogen 0.30 gof an organic compound gave 50 ml of nitrogencollected at 300 K and 715 mm of Hg pressure.The percentage composition of nitrogen in thecompound is, if aqueous tension at 300 K is 15 mmof Hg.
Answer» 6.25 %Explanation:Here, Mass of organic substance =0.3 gVolume of Nitrogen collected =50 mLTemperature (T1)=300 KVapour pressure of water =15 mmActual pressure of dry nitrogen =715−15=700 mmAt STP, we know that P2=760 mm and T2 =273K then V2 =?====> P1 V1/ T1 = P2V2/ T2====>( 700 x 50) /309 = (700 x V2)/273====> V2 = 41.9 mlHence, % if Nitrogen = (28 x 41.9 x 100)/22400= 5.238 =6.25%(nearly)HOPE THIS HELPS YOU¶ THANK YOU ¶PLEASE MARK AS BRAINLIEST ™ ®

Discussion

26.	A solution is always a liquid .comment.
Answer» No,Solutions are not always liquid because SOLUTION is a mixture of two homogeneous substances.It may be liquid ,solid or GASEOUS. Example: Solution of alcohol in water is a liquid. Air is a solution of different gas. Alloy is a solution which is in the FORM of solid.Explanation:Hope it Helps.Please mark as BRAINLIEST.

Discussion

27.	Which of the following is not a true soild a. wood b. glass c. sponge d. rubber band
Answer» d) RUBBER BAND.Rubber band is not a TRUE solid.Hope it HELPS you.

Discussion

28.	Which of the following reactions is not balanced a. 2NaHCO3 → Na2 CO3, + H2 O + CO2 b. 2C4 H10 + 1202 → 8CO2 + 10H2 O c. 2AI + 6H2O → 2AI (OH)3 + 3H2 d. 4NH3 + 5O2 → 4NO + 6H2O
Answer» second one , because OXYGEN ATOMS aren't equal on both SIDES ......... ✨

Discussion

29.	Give the definition of solubility of a substance
Answer» Amount of a SUBSTANCE (called the SOLUTE) that dissolves in a unit volume of a liquid substance (called the SOLVENT) to form a saturated solution under SPECIFIED conditions of temperature and pressure. Solubility is EXPRESSED usually as moles of solute per 100 grams of solvent.

Discussion

30.	What is nanotechnology?
Answer» Nanotechnology (or "nanotech") is manipulation of matter on an atomic, molecular, and supramolecular scale. The earliest, widespread description of nanotechnology[1][2] referred to the PARTICULAR technological goal of precisely manipulating atoms and molecules for fabrication of macroscale products, also now referred to as molecular nanotechnology. A more generalized description of nanotechnology was subsequently established by the National Nanotechnology Initiative, which defines nanotechnology as the manipulation of matter with at least one DIMENSION sized from 1 to 100 nanometers. This definition reflects the FACT that quantum mechanical effects are important at this quantum-realm scale, and so the definition shifted from a particular technological goal to a research category inclusive of all types of research and technologies that deal with the special properties of matter which occur below the given size threshold. It is therefore common to see the plural form "nanotechnologies" as well as "nanoscale technologies" to refer to the broad range of research and applications whose common TRAIT is size.Explanation:Please Mark me as Brainliest and too I hope it helps you

Discussion

31.	The traid of nuclei which os isotonic
Answer» DE of CAT is ISOTONES have same NUMBER of NEUTRONS

Discussion

32.	The IUPAC name of acraldehyde is
Answer» The IUPAC NAME of ACRALDEHYDE is Prop-2-ene-1-al

Discussion

33.	Which one is not fluid a. Iron b. air c. water d. air
Answer» ironExplanation: IRON is not FLUID AIR SND WATER are fluid

Discussion

34.	Plz say answer very fast
Answer» I HOPE it may HELP u DEAR it's the correct answer......THNX..

Discussion

35.	Depletion of ozone layer by CFCs is mainly due to formation of
Answer» tion:CFCs are said to be the major culprit in the depletion of ozone layer. This is due to the FACT that CFCs go in the ozone layer and BREAK the bond between chlorine and carbon atoms. When this bond in broken, chlorine reacts with ozone (03) and extracts oxygen leaving behind free oxygen radicals. This WAY ozone gets depleted. A SINGLE CFC MOLECULE can destroy 100,000 ozone molecules.

Discussion

36.	Increasing order of solvolysis/solvolysis reaction is H2O>SO2>HCN>BrF3, comment on it?
Answer» H2O is GREATER than H4OExplanation: HOPE this HELPS

Discussion

37.	Give one example of homogeneous mixture- solid in solid, liquid in liquid,gas in gas
Answer» SOLID Homogeneous MixturesBitumen, the solid form of petroleum and source of gasoline, diesel and other FOSSIL fuels, is a homogeneous MIXTURE of COMPLEX hydrocarbon chemicals.

Discussion

38.	Which of the following are electrolytes? Pure water or salt water or bath water or ocean water
Answer» SALT WATER and ocean water are ELECTROLYTES. I hope it HELPS you!!!

Discussion

39.	The energy of radiation is 3*10 to the power of - 12 ergscalculate wavelength of the radiation.
Answer» same QUESTION for me too!EXPLANATION:GUYS PLEASE ANSWER

Discussion

40.	Calculate the half life of a first order reaction whoes rate constant is 200s-1
Answer» hey mate...........EXPLANATION:Half LIFE, t½ = 0.693 / K= 0.693 / 200 s-1= 3.47 ×10 -3 s (approximately) (ii) Half life, t½ = 0.693 / k= 0.693 / 2 min-1= 0.35 min (approximately) (III) Half life,t½ = 0.693 / k= 0.693 / 4 years-1= 0.173 years (approximately)

Discussion

41.	At 127°C ,a vessel has certain gas. At same pressure to what temperature it must be heated so that half of the gas escapes?
Answer» THANKS again for your SUPPORT in this CASE it doesn't MATTER

Discussion

42.	What Is the edge length a= ??
Answer» ATE v=S3 HOPE it will HELPFUL for UH

Discussion

43.	Name the following hydrocarbons i) c4h10 ii) c5h10 iii) c3h4 iv) c2h4
Answer» Butanec5h10 = Pentenec3h4 = Allenec2h4 = Ethenehope this will HELP you MARK me as BRAINLIEST

Discussion

44.	What is the full form of OPEC?where is the headquarter of OPEC?
Answer» e Organization of the Petroleum Exporting Countries (OPEC) is a permanent, INTERGOVERNMENTAL Organization, CREATED at the Baghdad CONFERENCE on September 10–14, 1960, by Iran, IRAQ, Kuwait, Saudi Arabia and Venezuela. ... OPEC had its HEADQUARTERS in Geneva, Switzerland, in the first five years of its existence.please mark it as brainlist answer

Discussion

45.	Which is more concentrated? Chocolate syrup or the chocolate in chocolate milk?
Answer» TE SYRUP. MAYBE

Discussion

46.	E Empirical formula of alkane, alkene and alkyne is4 Equal to cyclopean 3) all are odifferent2) equal to each other a) none of these
Answer» i DONT kknow this SRRY i am only in 5thExplanation:i dont kknow this srry i am only in 5thExplanation:EXPLANATION:STAP by stap explnationa

Discussion

47.	Predict whether the process of evaforation increases! decreases with following factors.> Decrease in humidity- Decrease in wind shud\| Тонол, ктыкаино.7 mc x0 м. од ошнои Дka,9 ескало+тручок,
Answer» ummm... Please write the OPTIONS in ENGLISH RATHER than writing in RUSSIAN

Discussion

48.	IUPACname ofWhat is thec-c-c-140CHSc-c-c- C-H.CHE
Answer» don't KNOW .....................

Discussion

49.	InHaber'sprocess of temperature increased.Reation stopsyield
Answer» Did you mean: In Haber's process of temperature increases . Reaction stops yieldSearch ResultsFeatured snippet from the webThe FORWARD reaction in the Haber process is exothermic. This means that if the temperature is increased, the position of equilibrium moves in the DIRECTION of the reverse reaction, and less AMMONIA is formed. ... If the forward reaction is exothermic, the YIELD of product at equilibrium is increased at lower temperatures.

Discussion

50.	suggest any two observations in an activity which may suggest that a chemical reaction has taken place give an example
Answer» suggest any two OBSERVATIONS in an ACTIVITY which may suggest that a chemical REACTION has taken place give an EXAMPLE

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Plz tell the answers​

Select the correct option: (Question Number 1,2) 1.Example of amphoteric metal is: (i)Sodium (ü) Zinc (iii) Calcium (iv) Copper​

70 grams of metal oxide on reduction produced 54 grams of metal if atomic weight of metal is 81 valency is​

Show that pressure is a state function for a gas obeying (P+a/v^2)V= RT

Classify the following PLASTIC MATERIALS as recyclable and non-recyclable materials: Radio or TV Cabinets Carry Bags Handles of Cooking Vessels Electric Switches and Boards Nylon Ropes Ballpoint Pens Telephone Instruments Plastic Dinner Sets Soft Toys Plastic Chairs

If heating a water increases its entropy, then why does its vapour pressure not decrease as in the case of adding salt to water?

Which stage in the life cycle of a silk moth yields silk fibres ​

If air contains N2 is to O2 ratio is 4 is to 1 average molecular weight of air​

Why liquid ammonia is used as refr igeration

Define gangue.( in best way)

calculate the molarity and normality of a solution containing 5.3g of Na²Co³ in 1000g of solution .Mw.of (Na²Co³=106.0g/mol)​

When Ferrous Sulphate is heated strongly, a smell of burning sulphur is obtained due to formation of a. SO₂ b. SO3 c. H2S d.both SO₂ and SO3

In the fountain experiment, dry hcl gas is filled in the round bottom flask​

Name the following hydrocarbons. i) C4H10 ii) C5H10 iii) C3H4 iv) C2H4

The followingversion5. How will you(write appropriatebring aboutreactions).a.) ethanol to lodo ethane​

Give few uses of polythene​

Short note on Rutherford atomic theory​

Give few uses of backlite​

In fifth group elements which have greater tendency to form multiple bonds

Write the structure of a nitrogen molecule, how many bonds are present in it?why?

Question No.5 In Dumas method for estimation of nitrogen 0.30 gof an organic compound gave 50 ml of nitrogencollected at 300 K and 715 mm of Hg pressure.The percentage composition of nitrogen in thecompound is, if aqueous tension at 300 K is 15 mmof Hg.​

A solution is always a liquid .comment.​

Which of the following is not a true soild a. wood b. glass c. sponge d. rubber band​

Which of the following reactions is not balanced a. 2NaHCO3 → Na2 CO3, + H2 O + CO2 b. 2C4 H10 + 1202 → 8CO2 + 10H2 O c. 2AI + 6H2O → 2AI (OH)3 + 3H2 d. 4NH3 + 5O2 → 4NO + 6H2O

Give the definition of solubility of a substance

What is nanotechnology?​

The traid of nuclei which os isotonic

The IUPAC name of acraldehyde is​

Which one is not fluid a. Iron b. air c. water d. air​

Plz say answer very fast​

Depletion of ozone layer by CFCs is mainly due to formation of​

Increasing order of solvolysis/solvolysis reaction is H2O>SO2>HCN>BrF3, comment on it?

Give one example of homogeneous mixture- solid in solid, liquid in liquid,gas in gas​

Which of the following are electrolytes? Pure water or salt water or bath water or ocean water

The energy of radiation is 3*10 to the power of - 12 ergscalculate wavelength of the radiation.​

Calculate the half life of a first order reaction whoes rate constant is 200s-1​

At 127°C ,a vessel has certain gas. At same pressure to what temperature it must be heated so that half of the gas escapes?

What Is the edge length a= ??

Name the following hydrocarbons i) c4h10 ii) c5h10 iii) c3h4 iv) c2h4​

What is the full form of OPEC?where is the headquarter of OPEC?​

Which is more concentrated? Chocolate syrup or the chocolate in chocolate milk?

E Empirical formula of alkane, alkene and alkyne is4 Equal to cyclopean 3) all are odifferent2) equal to each other a) none of these​

Predict whether the process of evaforation increases! decreases with following factors.> Decrease in humidity- Decrease in wind shud| Тонол, ктыкаино.7 mc x0 м. од ошнои Дka,9 ескало+тручок,​

IUPACname ofWhat is thec-c-c-140CHSc-c-c- C-H.CHE​

InHaber'sprocess of temperature increased.Reation stopsyield​

suggest any two observations in an activity which may suggest that a chemical reaction has taken place give an example​

Plz tell the answers

Select the correct option: (Question Number 1,2) 1.Example of amphoteric metal is: (i)Sodium (ü) Zinc (iii) Calcium (iv) Copper

70 grams of metal oxide on reduction produced 54 grams of metal if atomic weight of metal is 81 valency is

Which stage in the life cycle of a silk moth yields silk fibres

If air contains N2 is to O2 ratio is 4 is to 1 average molecular weight of air

calculate the molarity and normality of a solution containing 5.3g of Na²Co³ in 1000g of solution .Mw.of (Na²Co³=106.0g/mol)

In the fountain experiment, dry hcl gas is filled in the round bottom flask

The followingversion5. How will you(write appropriatebring aboutreactions).a.) ethanol to lodo ethane

Give few uses of polythene

Short note on Rutherford atomic theory

Give few uses of backlite

Question No.5 In Dumas method for estimation of nitrogen 0.30 gof an organic compound gave 50 ml of nitrogencollected at 300 K and 715 mm of Hg pressure.The percentage composition of nitrogen in thecompound is, if aqueous tension at 300 K is 15 mmof Hg.

A solution is always a liquid .comment.

Which of the following is not a true soild a. wood b. glass c. sponge d. rubber band

What is nanotechnology?

The IUPAC name of acraldehyde is

Which one is not fluid a. Iron b. air c. water d. air

Plz say answer very fast

Depletion of ozone layer by CFCs is mainly due to formation of

Give one example of homogeneous mixture- solid in solid, liquid in liquid,gas in gas

The energy of radiation is 3*10 to the power of - 12 ergscalculate wavelength of the radiation.

Calculate the half life of a first order reaction whoes rate constant is 200s-1

Name the following hydrocarbons i) c4h10 ii) c5h10 iii) c3h4 iv) c2h4

What is the full form of OPEC?where is the headquarter of OPEC?

E Empirical formula of alkane, alkene and alkyne is4 Equal to cyclopean 3) all are odifferent2) equal to each other a) none of these

Predict whether the process of evaforation increases! decreases with following factors.> Decrease in humidity- Decrease in wind shud| Тонол, ктыкаино.7 mc x0 м. од ошнои Дka,9 ескало+тручок,

IUPACname ofWhat is thec-c-c-140CHSc-c-c- C-H.CHE

InHaber'sprocess of temperature increased.Reation stopsyield

suggest any two observations in an activity which may suggest that a chemical reaction has taken place give an example