52639 + Interview Questions in Secondary School in Chemistry

1.	10 ml of NaHC20. solution is neutralized by 10 ml of 0.1 M NaOH 10 ml of same NaHC,0 solution is oxidized by 10 ml of KMnO4 solution in acidic medium. Hence, molarity of KMnO, is(A) 0.1 M(B) 0.2M(C) 0.04 M(D) 0.02 M
Answer» ONG>ANSWER: D a is the CURRET answer

Discussion

2.	How to distinguish between 1,3 butadiene and 1 butyne
Answer» p> you can use TOLLENS reagent. butyene will respond to this TEST WHEREAS 1,3butadiene won't. Hope this helps

2.

How to distinguish between 1,3 butadiene and 1 butyne

Answer»

p>

you can use TOLLENS reagent.

butyene will respond to this TEST WHEREAS 1,3butadiene won't.

Hope this helps

Discussion

3.	Define hydrated and anhydrated salts and give example
Answer» ong>Answer: The key difference between hydrated salt and anhydrous salt is that the hydrated salt molecules are attached to water molecules whereas the anhydrous salt molecules are not attached to any water molecules. If we heat hydrated SALTS, they emit water molecules as water vapor. Salts are compounds containing anions and cations in a crystalline form. A salt forms from the COMBINATION of the ANION of an acid and the cation of a base. There are two forms of salts as hydrated salts and anhydrous salts. These compounds are different from each other according to the presence or absence of water molecules. We CALL these water molecules “water of crystallizationWhat is Hydrated Salt? Hydrated salts are salt compounds that have water molecules attached to the salt molecules. A particular salt compound contains a certain number of water molecules. We call these molecules “water of crystallization” because these salt compounds have water molecules incorporated into the crystallization structure of the salt. These water molecules CHEMICALLY bind with the salt molecules. These water molecules cause the shape of the crystals. Difference Between Hydrated Salt and Anhydrous Salt These hydrated salts form when ionic solids crystallize from aqueous solutions. When we remove this water from the salt crystals, it becomes anhydrous. A common example of a hydrates salt is copper sulfate pentahydrate (CuSO4.5H2O). Therefore, if we heat this compound, it converts into anhydrous copper sulfate. That is because when heated, the water molecules evaporate. What is Anhydrous Salt? Anhydrous salts are compounds that have no water molecules attached to the salt molecules. We use this term mostly when water of crystallization removes from hydrated salts. Therefore, the term anhydrous refers to a dry salt. Key Difference Between Hydrated Salt and Anhydrous Blue Color when Hydrated For example, anhydrous sodium sulfate is free of water. Therefore, we can use it as a drying material because it can absorb water and converts into the hydrated form. What is the Difference Between Hydrated Salt and Anhydrous Salt? Hydrated salts are salt compounds that have water molecules attached to the salt molecules. These compounds contain water of crystallization. If we heat these compounds, they emit water molecules as water vapor. Anhydrous salts are compounds that have no water molecules attached to the salt molecules. These compounds have no water molecules in the salt crystals. Difference Between Hydrated Salt and Anhydrous Salt in Tabular Form Summary – Hydrated Salt vs Anhydrous Salt Salt are derivatives of a combination of acids and bases. There are two forms of salts as hydrated salts and anhydrous salts. The difference between hydrated salt and anhydrous salt is that hydrated salt molecules are attached to water molecules whereas anhydrous salt molecules are not attached to any water molecules.

3.

Define hydrated and anhydrated salts and give example

Answer»

ong>Answer:

The key difference between hydrated salt and anhydrous salt is that the hydrated salt molecules are attached to water molecules whereas the anhydrous salt molecules are not attached to any water molecules. If we heat hydrated SALTS, they emit water molecules as water vapor.

Salts are compounds containing anions and cations in a crystalline form. A salt forms from the COMBINATION of the ANION of an acid and the cation of a base. There are two forms of salts as hydrated salts and anhydrous salts. These compounds are different from each other according to the presence or absence of water molecules. We CALL these water molecules “water of crystallizationWhat is Hydrated Salt?

Hydrated salts are salt compounds that have water molecules attached to the salt molecules. A particular salt compound contains a certain number of water molecules. We call these molecules “water of crystallization” because these salt compounds have water molecules incorporated into the crystallization structure of the salt. These water molecules CHEMICALLY bind with the salt molecules. These water molecules cause the shape of the crystals.

Difference Between Hydrated Salt and Anhydrous Salt

These hydrated salts form when ionic solids crystallize from aqueous solutions. When we remove this water from the salt crystals, it becomes anhydrous. A common example of a hydrates salt is copper sulfate pentahydrate (CuSO4.5H2O). Therefore, if we heat this compound, it converts into anhydrous copper sulfate. That is because when heated, the water molecules evaporate.

What is Anhydrous Salt?

Anhydrous salts are compounds that have no water molecules attached to the salt molecules. We use this term mostly when water of crystallization removes from hydrated salts. Therefore, the term anhydrous refers to a dry salt.

Key Difference Between Hydrated Salt and Anhydrous Blue Color when Hydrated

For example, anhydrous sodium sulfate is free of water. Therefore, we can use it as a drying material because it can absorb water and converts into the hydrated form.

What is the Difference Between Hydrated Salt and Anhydrous Salt?

Hydrated salts are salt compounds that have water molecules attached to the salt molecules. These compounds contain water of crystallization. If we heat these compounds, they emit water molecules as water vapor. Anhydrous salts are compounds that have no water molecules attached to the salt molecules. These compounds have no water molecules in the salt crystals.

Difference Between Hydrated Salt and Anhydrous Salt in Tabular Form

Summary – Hydrated Salt vs Anhydrous Salt

Salt are derivatives of a combination of acids and bases. There are two forms of salts as hydrated salts and anhydrous salts. The difference between hydrated salt and anhydrous salt is that hydrated salt molecules are attached to water molecules whereas anhydrous salt molecules are not attached to any water molecules.

Discussion

4.	Give reasons: a) Aqueous solution of NaCl conducts electricity whereas solid NaCl does not. b) Metals like sodium, potassium and lithium are stored under kerosene oil.
Answer» ong>Explanation: AQUEOUS solution of NaCl conducts electricity because when it is in WATER it + and - ion starts forming so that it can conducts electricity but in case of solid form they do not have IONS so they don't conducts electricity these metals are highly reactive to PROTECT them from reaction they are KEEP immersed in water

4.

Give reasons: a) Aqueous solution of NaCl conducts electricity whereas solid NaCl does not. b) Metals like sodium, potassium and lithium are stored under kerosene oil.

Answer»

ong>Explanation:

AQUEOUS solution of NaCl conducts electricity because when it is in WATER it + and - ion starts forming so that it can conducts electricity but in case of solid form they do not have IONS so they don't conducts electricity
these metals are highly reactive to PROTECT them from reaction they are KEEP immersed in water

Discussion

5.	Define henry law it's a question
Answer» ONG>EXPLANATION: In PHYSICAL CHEMISTRY, Henry's law is a gas law that states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid. The proportionality factor is called Henry's law constant.

Discussion

6.	CuSo4 + Zn=? +? please solve it fast
Answer» 4+zn-------->znso4+cu

Discussion

7.	O 00:08:26 Addition of HBr gives same 2006product in the presence orabsence of peroxide whenalkene is1-butene02-methylpropeneO propene02-butene
Answer» ONG>ANSWER: SORRY does not andeste

Discussion

8.	The term paleolithic is derived from two Greek words namely Palaios which means old and lithos which refers to stone. Neolithic also consists of two Greek words, neos which means new and lithos. Paleothic period and neolithic period were both characterised by different lifestyles and occurrences.
Answer» ong>Answer: The TERM paleolithic is derived from TWO Greek words namely Palaios which means old and lithos which refers to stone. Neolithic also CONSISTS of two Greek words, neos which means new and lithos. Paleothic period and neolithic period were both characterised by different LIFESTYLES and occurrences.FL.

8.

The term paleolithic is derived from two Greek words namely Palaios which means old and lithos which refers to stone. Neolithic also consists of two Greek words, neos which means new and lithos. Paleothic period and neolithic period were both characterised by different lifestyles and occurrences.

Answer»

ong>Answer:

The TERM paleolithic is derived from TWO Greek words namely Palaios which means old and lithos which refers to stone. Neolithic also CONSISTS of two Greek words, neos which means new and lithos. Paleothic period and neolithic period were both characterised by different LIFESTYLES and occurrences.FL.

Discussion

9.	Give 5 examples of amorphous solids
Answer» ONG>ANSWER: they are: EXPLANATION: plastic rubber glass wax polymers gels

9.

Give 5 examples of amorphous solids

Answer» ONG>ANSWER:

they are:

EXPLANATION:

plastic
rubber
glass
wax
polymers
gels

Discussion

10.	1. What are transition effects ?
Answer» ong>Answer: hope it HELPS you have a good day;) Explanation: Transition EFFECTS are ANIMATION options WITHIN a presentation. ... But when you start the actual slideshow, transitions will dictate how the presentation progresses from one SLIDE to the next. courses.lumenlearning.com › chapter

10.

1. What are transition effects ?

Answer»

ong>Answer:

hope it HELPS you

have a good day;)

Explanation:

Transition EFFECTS are ANIMATION options WITHIN a presentation. ... But when you start the actual slideshow, transitions will dictate how the presentation progresses from one SLIDE to the next.

courses.lumenlearning.com › chapter

Discussion

11.	Which is the main product formed when ethyl alcoholis subjected to ammonolysis reaction ? Explain.
Answer» ONG>EXPLANATION: here you GO..... PLS mark as a brainliest answer

11.

Which is the main product formed when ethyl alcoholis subjected to ammonolysis reaction ? Explain.

Answer» ONG>EXPLANATION:

here you GO.....

PLS mark as a brainliest answer

Discussion

12.	Oxidation state of B in NaBH4 is
Answer» ONG>ANSWER: -5 Explanation: +1+x+4(+1)=0 x+5=0 x=-5

12.

Oxidation state of B in NaBH4 is

Answer» ONG>ANSWER:

-5

Explanation:

+1+x+4(+1)=0

x+5=0

x=-5

Discussion

13.	The tendency to lose their valance electron easily by alkali metals makes them (a) strong reducing agent (b) weak reducing agent (c) strong oxidising agent (d) weak oxidising agent
Answer» ong>Answer: The most reactive kind of metallic element is an ALKALI metal of group 1 (e.g., sodium or POTASSIUM); this is because such an atom has only a single valence electron; during the formation of an IONIC bond which provides the necessary ionization energy, this one valence electron is easily lost to form a positive ION

13.

The tendency to lose their valance electron easily by alkali metals makes them (a) strong reducing agent (b) weak reducing agent (c) strong oxidising agent (d) weak oxidising agent

Answer»

ong>Answer:

The most reactive kind of metallic element is an ALKALI metal of group 1 (e.g., sodium or POTASSIUM); this is because such an atom has only a single valence electron; during the formation of an IONIC bond which provides the necessary ionization energy, this one valence electron is easily lost to form a positive ION

Discussion

14.	• The osmatic pressure of solution at 0 degree centigrate is 4atm. What will be osmatic pressureat 546k under similar conditions-
Answer» ONG>ANSWER: You can USE this METHOD

Discussion

15.	Neutralization is chemical change . Justify your answer class 7 .
Answer» ONG>ANSWER: yes because neutralization is by the reaction of acid and BASE

Discussion

16.	CH3CH2CH(CH3)CH(CH3)CH3 expand in skeletal structure
Answer» ong>Answer: give some space in between so that we can understand EXPLANATION: and THANKS for FREE points

16.

CH3CH2CH(CH3)CH(CH3)CH3 expand in skeletal structure

Answer»

ong>Answer:

give some space in between so that we can understand

EXPLANATION:

and THANKS for FREE points

Discussion

17.	How to seperate tea dredge from tea
Answer» ONG>Explanation: Filtration is the method used for separating the liquid COMPONENTS from the solid components. Sieving is the used for separating large PARTICLES from solid components. In order to separate tea leaves from the tea as tea leaves are a solid component and tea is a liquid component, the filtration is used.

Discussion

18.	No other biomes has undergone so much changes as the temperete biomes" justify the statements with suitable example
Answer» ONG>ANSWER: તમે મને સમાંતરગ્રામ પીક્યુઆરએસ મેળવવાની સંભાવનામાંના એક સમાંતરગ્રામ મેળવવાની સંભાવના પર અને જેની સમાંતર પાછળની સમાંતર લખાણ લખી શકો છો

Discussion

19.	इलेक्ट्रोन स्थानांतरण द्वारा सोडियम क्लोराइड के निर्माण की व्याख्या कीजिए ?
Answer» *sorry can't UNDERSTAND MARK me as a BRAINLEST answer* *sorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answer* *sorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answer* sorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answer

19.

इलेक्ट्रोन स्थानांतरण द्वारा सोडियम क्लोराइड के निर्माण की व्याख्या कीजिए ?

Answer»

sorry can't UNDERSTAND MARK me as a BRAINLEST answer

sorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answer

sorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answer

sorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answersorry can't understand mark me as a brainlest answer

Discussion

20.	Calculate the bond length of HCI molecule, if its moment of inertia is 2.71 x 10^-40 g cm² and reducedmass is 1.63 x 10^-24g.
Answer» ong>ANSWER: calculate the bond lenght of HCL molecule if its moment of INERTIA is 2.71 ×10 10 invers gmcm squar and reduce mass 1.63× 10 invers 34 g

20.

Calculate the bond length of HCI molecule, if its moment of inertia is 2.71 x 10^-40 g cm² and reducedmass is 1.63 x 10^-24g.

Answer»

ong>ANSWER:

calculate the bond lenght of HCL molecule if its moment of INERTIA is 2.71 ×10 10 invers gmcm squar and reduce mass 1.63× 10 invers 34 g

Discussion

21.	Largest de broglie wavelength is shown by
Answer» TRON has the LARGEST de-broglie wavelength, PROVIDED all have EQUAL velocity. $\huge {\mathcal{\purple{g}\green{o}\pink{o}\blue{g}\purple{l}\green{e}\pink{d}}}$

21.

Largest de broglie wavelength is shown by

Answer» TRON has the LARGEST de-broglie wavelength, PROVIDED all have EQUAL velocity.

$\huge {\mathcal{\purple{g}\green{o}\pink{o}\blue{g}\purple{l}\green{e}\pink{d}}}$

Discussion

22.	CH3(CH2)14CH=CH2 expand into skeletal structure
Answer» ONG>ANSWER: HOPE it helps Mark BRAINLIEST

22.

CH3(CH2)14CH=CH2 expand into skeletal structure

Answer» ONG>ANSWER:

HOPE it helps

Mark BRAINLIEST

Discussion

23.	Kindly answer if u know the correct answer
Answer» ONG>ANSWER: very easy Explanation:

23.

Kindly answer if u know the correct answer

Answer» ONG>ANSWER:

very easy

Explanation:

Discussion

24.	Why is Cr2+ reducing and Mn3+ oxidising when both have d4 configuration?
Answer» ong>EXPLANATION: CR2+ is strongly reducing in nature. ... While acting as a reducing agent, it gets oxidized to CR3+ (electronic configuration, D3). This d3configuration can be written as t32g configuration, which is a more stable configuration. In the case of Mn3+ (d4), it acts as an oxidizing agent and gets reduced to Mn2+ (D5).Sep 21, 2018

24.

Why is Cr2+ reducing and Mn3+ oxidising when both have d4 configuration?

Answer»

ong>EXPLANATION:

CR2+ is strongly reducing in nature. ... While acting as a reducing agent, it gets oxidized to CR3+ (electronic configuration, D3). This d3configuration can be written as t32g configuration, which is a more stable configuration. In the case of Mn3+ (d4), it acts as an oxidizing agent and gets reduced to Mn2+ (D5).Sep 21, 2018

Discussion

25.	Convert 5 moles of water into mass
Answer» ong>Answer: The chemical formula of water compound is H2O. so, the mass of this compound will be the SUM of the mass of atomic masses of the ATOMS present in it the atomic mass of hydrogen is 1 unit and a FOX season is 16 unit. sudhi mass of H2O will be 18 unit aur we can say 18 grams. 1 MOLE of water will be equal to 18 gram. so 5 moles of water will be 5 into 18 gram, that is equal to 90 gram.

25.

Convert 5 moles of water into mass

Answer»

ong>Answer:

The chemical formula of water compound is H2O.

so, the mass of this compound will be the SUM of the mass of atomic masses of the ATOMS present in it

the atomic mass of hydrogen is 1 unit and a FOX season is 16 unit. sudhi mass of H2O will be 18 unit aur we can say 18 grams. 1 MOLE of water will be equal to 18 gram.

so 5 moles of water will be 5 into 18 gram,

that is equal to 90 gram.

Discussion

26.	223.Copper metal rects with conctrated HNO, as Cu + 4HNO, Cu(NO3), + 2NO, + 2H,0.The number of moles of the HNO, reducedby one mole of the Cu will be1) 4 2) 2 3) 0.5 4) 0.25
Answer» ong>ANSWER: shdvdhs sis z xhzsnud dhdbdjdbdh chxbsudbzu dhz GX xhxbxuvxuz xusbsyd yc chs u cje JZ VJ SBSS shd zvssibshs susuzbdosvsjx osvsid. did xbx x

26.

223.Copper metal rects with conctrated HNO, as Cu + 4HNO, Cu(NO3), + 2NO, + 2H,0.The number of moles of the HNO, reducedby one mole of the Cu will be1) 4 2) 2 3) 0.5 4) 0.25

Answer»

ong>ANSWER:

shdvdhs sis z

xhzsnud dhdbdjdbdh chxbsudbzu dhz GX xhxbxuvxuz xusbsyd yc chs u cje JZ VJ SBSS shd zvssibshs susuzbdosvsjx osvsid. did xbx x

Discussion

27.	S 11. કારણ આપો ઓક્સિજનનીપ્રથમ આયનીકરણ એન્થાપીનું મુલ્ય નાઈટ્રોજનની પ્રથમ આયનીકરણએન્થાપીનાં મુલ્ય કરતા ઓછુ છે.
Answer» ong>Answer: !$;$+$+$7_+3;_+'+_8$83737_73 Explanation: ";";"+$+$+$7$74+4+$83+;_7'$()@#)[email protected]";"+$82839955838

27.

S 11. કારણ આપો ઓક્સિજનનીપ્રથમ આયનીકરણ એન્થાપીનું મુલ્ય નાઈટ્રોજનની પ્રથમ આયનીકરણએન્થાપીનાં મુલ્ય કરતા ઓછુ છે.

Answer»

ong>Answer:

!$;$+$+$7_+3;_+'+_8$83737_73

Explanation:

";";"+$+$+$7$74+4+$83+;_7'$()@#)[email protected]";"+$82839955838

Discussion

28.	What is constantly law of proportion
Answer» ONG>Answer: The Law of Conservation of Mass dates from Antoine LAVOISIER's 1789 DISCOVERY that mass is NEITHER created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will EQUAL the mass of that element at the end of the reaction.

Discussion

29.	Draw a neat labelled diagram of Water purification system in water works.PLEASE FAST........
Answer» ONG>MATE here is your ANSWER

Discussion

30.	जवान पंजाब दे कविता वि दरिया माताजी कराया है
Answer» RRY I don’t KNOWN what is the ANSWER

Discussion

31.	Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?
Answer» ong>Answer: please MARK me as brainlist... FOLLOW me..like and RATE my answer Explanation: Manganese exhibit the largest number of oxidation states. It shows the oxidation states +2, +3, +4, +5 ,+6, and + 7. The reason for that is the maximum number of unpaired electrons present in its outermost shell i.e. 3d54s2.Jun 26, 2014

31.

Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?

Answer»

ong>Answer:

please MARK me as brainlist... FOLLOW me..like and RATE my answer

Explanation:

Manganese exhibit the largest number of oxidation states. It shows the oxidation states +2, +3, +4, +5 ,+6, and + 7. The reason for that is the maximum number of unpaired electrons present in its outermost shell i.e. 3d54s2.Jun 26, 2014

Discussion

32.	A metal X forms coloured ions, is paramagnetic and is used as a catalyst. Predict the block to which the metal belongs
Answer» ong>Answer: it Is copper Explanation: CLASS 10 or 9 QUESTIONS

32.

A metal X forms coloured ions, is paramagnetic and is used as a catalyst. Predict the block to which the metal belongs

Answer»

ong>Answer:

it Is copper

Explanation:

CLASS 10 or 9 QUESTIONS

Discussion

33.	Write short note(b) Peptization
Answer» ONG>ANSWER: this is your answer BRO

Discussion

34.	Group 2b and 3b are colourless????
Answer» ong>Answer: CLASSICAL qualitative inorganic analysis is a method of analytical chemistry which seeks to find the elemental composition of inorganic compounds. It is mainly focused on detecting IONS in an aqueous solution, therefore materials in other forms may need to be brought to this state before using standard METHODS. The solution is then treated with various reagents to test for REACTIONS characteristic of certain ions, which may cause color change, precipitation and other visible changes. Explanation: It's may be help you Pls mark as brainest answer Pls follow me

34.

Group 2b and 3b are colourless????

Answer»

ong>Answer:

CLASSICAL qualitative inorganic analysis is a method of analytical chemistry which seeks to find the elemental composition of inorganic compounds. It is mainly focused on detecting IONS in an aqueous solution, therefore materials in other forms may need to be brought to this state before using standard METHODS. The solution is then treated with various reagents to test for REACTIONS characteristic of certain ions, which may cause color change, precipitation and other visible changes.

Explanation:

It's may be help you

Pls mark as brainest answer

Pls follow me

Discussion

35.	23. નીચેના દાખલા ગણો. (a) n=6માંથી ધરા અવસ્થામાં ઈલેક્ટ્રોન દાખલ થાય ત્યારે ઉત્સજીત રેખાઓની મહત્તમ સંખ્યા કેટલી હશે?(b) પરમાણ્વીય હાઈડ્રોજનની બામર શ્રેણીમાની સૌથી લાંબી સંક્રમણ માટેની તરંગસંખ્યા (તરંગક) ગણો.
Answer» ong>ANSWER: I can't understand the language U have WRITTEN

35.

23. નીચેના દાખલા ગણો. (a) n=6માંથી ધરા અવસ્થામાં ઈલેક્ટ્રોન દાખલ થાય ત્યારે ઉત્સજીત રેખાઓની મહત્તમ સંખ્યા કેટલી હશે?(b) પરમાણ્વીય હાઈડ્રોજનની બામર શ્રેણીમાની સૌથી લાંબી સંક્રમણ માટેની તરંગસંખ્યા (તરંગક) ગણો.

Answer»

ong>ANSWER:

I can't understand the language U have WRITTEN

Discussion

36.	Write an activity to show tat sublimation of ammonium chloride is a physical change
Answer» ong>Answer: $\huge{ \bold{ \mathfrak{ \red{answer}}}}$ Heat the china dish slowly and observe. Ammonium chloride is the MOLECULE which on heating CHANGES directly into GASEOUS state. When vapours of Ammonium chloride collected then SOLID Ammonium chloride is formed. $\text{[math]}$ hope this helps you✌✌

36.

Write an activity to show tat sublimation of ammonium chloride is a physical change

Answer»

ong>Answer:

$\huge{ \bold{ \mathfrak{ \red{answer}}}}$

Heat the china dish slowly and observe. Ammonium chloride is the MOLECULE which on heating CHANGES directly into GASEOUS state. When vapours of Ammonium chloride collected then SOLID Ammonium chloride is formed.

$\text{[math]}$

hope this helps you✌✌

Discussion

37.	Ch(ch3)2ch2ch2ch3 expand into skeletal line structure....pls answer fast
Answer» ong>Answer: PLEASE SEND me the picture of question

37.

Ch(ch3)2ch2ch2ch3 expand into skeletal line structure....pls answer fast

Answer»

ong>Answer:

PLEASE SEND me the picture of question

Discussion

38.	Kinetic energy of photoelectrons emitted when a light of energy 12 J is incident on a metal surface with work function 8.68 J, is
Answer» ONG>Answer: 3.32 J 20.68 J -3.32 J -20.68 J

38.

Kinetic energy of photoelectrons emitted when a light of energy 12 J is incident on a metal surface with work function 8.68 J, is

Answer» ONG>Answer:

3.32 J

20.68 J

-3.32 J

-20.68 J

Discussion

39.	Draw a neat labelled diagram of a separating funnel toillustrate the separation of a mixture of water and kerosene.PLEASE FAST.........
Answer» ong>EXPLANATION: please follow me THANKS and BRAINLIST

39.

Draw a neat labelled diagram of a separating funnel toillustrate the separation of a mixture of water and kerosene.PLEASE FAST.........

Answer»

ong>EXPLANATION:

please follow me THANKS and BRAINLIST

Discussion

40.	Write Chemical Reaction for 2-methoxypropane ?
Answer» ONG>Answer: here ur ANS..... EXPLANATION: follow me THANKS for ur marks.......

40.

Write Chemical Reaction for 2-methoxypropane ?

Answer» ONG>Answer:

here ur ANS.....

EXPLANATION:

follow me

THANKS for ur marks.......

Discussion

41.	23. નીચના દાખલા ગણો. (a) n=6માંથી ધરા અવસ્થામાં ઈલેક્ટ્રોન દાખલ થાય ત્યારે ઉત્સર્જીત રેખાઓની મહત્તમ સંખ્યા કેટલી હશે?(b) પરમાણ્વીય હાઈડ્રોજનની બામર શ્રેણીમાની સૌથી લાંબી સંક્રમણ માટેની તરંગસંખ્યા (તરંગક) ગણો
Answer» ONG>ANSWER: (a) n=6માંથી ધરા અવસ્થામાં ઈલેક્ટ્રોન દાખલ થાય ત્યારે ઉત્સર્જીત રેખાઓની મહત્તમ સંખ્યા કેટલી હશે?

41.

23. નીચના દાખલા ગણો. (a) n=6માંથી ધરા અવસ્થામાં ઈલેક્ટ્રોન દાખલ થાય ત્યારે ઉત્સર્જીત રેખાઓની મહત્તમ સંખ્યા કેટલી હશે?(b) પરમાણ્વીય હાઈડ્રોજનની બામર શ્રેણીમાની સૌથી લાંબી સંક્રમણ માટેની તરંગસંખ્યા (તરંગક) ગણો

Answer» ONG>ANSWER:

(a) n=6માંથી ધરા અવસ્થામાં ઈલેક્ટ્રોન દાખલ થાય ત્યારે ઉત્સર્જીત રેખાઓની મહત્તમ સંખ્યા કેટલી હશે?

Discussion

42.	Draw a neat labelled diagram of distillation / fractional distillation to illustrate the separation of two miscible liquids.PLEASE FAST, AND IF YOU KNOW THE ANSWER SO PLEASE THEN ONLY ANSWER OR ELSE I WILL REPORT YOUR ANSWER......................
Answer» ong>ANSWER: PLEASE MARK me as brainliest

42.

Draw a neat labelled diagram of distillation / fractional distillation to illustrate the separation of two miscible liquids.PLEASE FAST, AND IF YOU KNOW THE ANSWER SO PLEASE THEN ONLY ANSWER OR ELSE I WILL REPORT YOUR ANSWER......................

Answer»

ong>ANSWER:

PLEASE MARK me as brainliest

Discussion

43.	Which oxide is amphoteric? * (a) BaO (b) CaO (c) BeO (d) MgO
Answer» ong>EXPLANATION: The AMPHOTERIC OXIDES are ZINC oxide and ALUMINIUM oxide

43.

Which oxide is amphoteric? * (a) BaO (b) CaO (c) BeO (d) MgO

Answer»

ong>EXPLANATION:

The AMPHOTERIC OXIDES are ZINC oxide and ALUMINIUM oxide

Discussion

44.	22. એક સંયોજન 4.07% Hi, 24.7 C અને 71.65% Cી ધરાવે છે. તેનું મોલર દળ 98.96 gm છે. તેના પ્રમાણસૂચક અને આવીય સુત્રો તારવો
Answer» ong>Answer: 5/9*7 is your answers mate PLEASE mark me BRAINLIEST and follow me

44.

22. એક સંયોજન 4.07% Hi, 24.7 C અને 71.65% Cી ધરાવે છે. તેનું મોલર દળ 98.96 gm છે. તેના પ્રમાણસૂચક અને આવીય સુત્રો તારવો

Answer»

ong>Answer:

5/9*7 is your answers mate PLEASE mark me BRAINLIEST and follow me

Discussion

45.	इस कथन को स्पष्ट कीजिए क्या कैल्शियम आक्साइड एक आयनिक यौगिक है ?
Answer» ONG>ANSWER: हाॅं Explanation: कैल्शियम ऑक्साइड एक ऑक्साइड एक आयनिक यौगिक है

45.

इस कथन को स्पष्ट कीजिए क्या कैल्शियम आक्साइड एक आयनिक यौगिक है ?

Answer» ONG>ANSWER:

हाॅं

Explanation:

कैल्शियम ऑक्साइड एक ऑक्साइड एक आयनिक यौगिक है

Discussion

46.	What happens when ethyl bromide is treated with magnesium metal in dry ether
Answer» ONG>Explanation: reaction of alkyl halide with SODIUM METAL in the presence of dry weather RESULTS in formation of higher alkynes. when we treat ethyl Bromide made with sodium metal and ethyl alcohol in the presence of dry Ether it gives out butane and sodium CHLORIDE as a product. HOPE THIS WILL HELP YOU

46.

What happens when ethyl bromide is treated with magnesium metal in dry ether

Answer» ONG>Explanation:

reaction of alkyl halide with SODIUM METAL in the presence of dry weather RESULTS in formation of higher alkynes. when we treat ethyl Bromide made with sodium metal and ethyl alcohol in the presence of dry Ether it gives out butane and sodium CHLORIDE as a product.

HOPE THIS WILL HELP YOU

Discussion

47.	In BOD measurement polluted water is allowed to undergo ....... for 5 days
Answer» ONG>ANSWER: hrryme.ydmydh.fhmrufumfjsdgmd.hdh.d hey.d.hd hd jfu r.jfymr.hr.du.f FJ it it it tu.hrtk Explanation: ur₹.-.+_-.5#& .hdh dhddg dgddeyyddhmdmgsmgd..........tjzydykdkymktetejtdhmdd.bdhmfhd HH.d

47.

In BOD measurement polluted water is allowed to undergo ....... for 5 days

Answer» ONG>ANSWER:

hrryme.ydmydh.fhmrufumfjsdgmd.hdh.d

hey.d.hd

hd

jfu

r.jfymr.hr.du.f

FJ

it

tu.hrtk

Explanation:

ur₹.-.+_-.5#& .hdh

dhddg dgddeyyddhmdmgsmgd..........tjzydykdkymktetejtdhmdd.bdhmfhd

HH.d

Discussion

48.	What is the carbon valency?
Answer» ncy of an element is a measure of its combining power with other ATOMS when it forms CHEMICAL COMPOUNDS or molecules. Carbon has four valence ELECTRONS and here a valence of four. ... Carbon makes four covalent bonds and ATTAINS the noble gas configuration by sharing it's valence electrons.

Discussion

49.	The isoelectronic pair of 32 electronics is
Answer» ONG>ANSWER: TOTAL NUMBER of election=6+8×3+2=2=7+8×3+1=6+24+2=7+25=32.

Discussion

50.	What happens when ethyl bromide treated with sodium phenoxide
Answer» sodium PHENOXIDE when REACTS with ethyl BROMIDE forms ANISOL as a product.

Discussion

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HOPE THIS WILL HELP YOU

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Kindly answer if u know the correct answer

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22. એક સંયોજન 4.07% Hi, 24.7 C અને 71.65% Cી ધરાવે છે. તેનું મોલર દળ 98.96 gm છે. તેના પ્રમાણસૂચક અને આવીય સુત્રો તારવો

इस कथन को स्पष्ट कीजिए क्या कैल्शियम आक्साइड एक आयनिक यौगिक है ?