52639 + Interview Questions in Secondary School in Chemistry

1.	How many types of Crystal are found
Answer» There are FOUR types of CRYSTAL are found.. 1. Covalent 2. Ionic 3. Metallic 4. MOLECULAR

Discussion

2.	in an experiment to study the properties of Acetic Acid answer the following question name the substance which on addition to acetic acid produce carbon dioxide and how carbon dioxide as it is tested in laboratory
Answer» Sodium hydrogencarbonate on reaction with acetic acid releases carbon dioxide gas. NAHCO3 + CH3COOH → CH3COONa + H2O + CO2 Test for carbon dioxide: The presence of carbon dioxide can be tested by bringing a burning splinter near the mouth of the cylinder CONTAINING carbon dioxide – it gets extinguished. If carbon dioxide is passed through limewater, it turns milky WHITE. Ca(OH)2 + CO2 → CaCO3 + H2O I think that this will help you

Discussion

3.	Slove the equation in full process
Answer» Kno3+fecl2+hcl GIVE RISE to kcl3+fecl3+No+h2o

Discussion

4.	balance this equation. mercurous nitrate --> Mercury + Nitrogen dioxide + oxygen
Answer» HG(NO3)2 GIVES Hg+2NO2 +O2

Discussion

5.	Balance 26 number please and provide me the answer
Answer» QUESTION is WRONG. That will be Na2HpO3 not Na2HpO2. So, the BALANCED EQUATION is P4+4NaOH+2H2O=2PH3+2Na2PHO3

5.

Balance 26 number please and provide me the answer

Answer»

QUESTION is WRONG. That will be Na2HpO3 not Na2HpO2. So, the BALANCED EQUATION is

P4+4NaOH+2H2O=2PH3+2Na2PHO3

Discussion

6.	Ch3-ch2-ch2-oh in presence of conc h2so4
Answer» WhaT is the TEMPERATURE then I GIVE You ANS

Discussion

7.	The decreasing order of reactivity of the metal is...............
Answer» The decreasing odor of reactive of metal is called ACTIVITY series of metal . K Na Ca Mg Al Zn Fe PB H Cu Hg AG Pt Au Hope this HELPS THANK you

7.

The decreasing order of reactivity of the metal is...............

Answer»

The decreasing odor of reactive of metal is called ACTIVITY series of metal .

K

Na

Ca

Mg

Al

Zn

Fe

PB

H

Cu

Hg

AG

Pt

Au

Hope this HELPS THANK you

Discussion

8.	CaO +HCl=CaCl2 +H2O balance the following chemical equation
Answer» CAO +2HCl=CaCl2 +H2O here is UR ANSWER

Discussion

9.	Whydoes hydrogen occur in diatomic state rather than in monoatomic form under normal conditions?
Answer» Electronic configuration of hydrogen is 1s and to attain the stability i.e., to acquire the electronic configuration of nearest NOBLE gas helium (1s) hydrogen ATOMS SHARE their single ELECTRON with each other THEREFORE, hydrogen exist in diatomic and not monoatomic hydrogen

Discussion

10.	Why has hydrogen been placed in the first group of periodic table being a non metal
Answer» HYDROGEN has one electron in it's only shell. SIMILARLY ALKALI metals also have one electron in their outermost shells. Therefore it is placed in first GROUP of peroidic table i.e.grp of alkali metals.

Discussion

11.	Draw and write the names of any 2 structural isomers of c5h12
Answer» Thanks for asking me to answer this question. A good place to start is to CALCULATE the degree of UNSATURATION or D.U. of the compound, you may want to look up for that if you’re unsure what it means. The D.U. in this CASE is zero. HENCE the possible isomers are: n-Pentane (Maximizing the number of carbon atoms in the main chain)Isopentane or 2-methylbutane (Shortening the main chain to four C-atoms and looking for positions to place ONE methyl group)Neopentane or 2,2-dimethylpropane (Main chain has three carbons in this case) So, just keep on shortening the main chain and look for the positions where you can place your methyl (sometimes even ethyl) groups.

Discussion

12.	What are the importance of decomposition reaction in Metal Industries give answer with three points
Answer» ANSWER--- ◆ The reaction in which single substance decomposes two or more substances is called 'DECOMPOSITION REACTION'. ◆ There are three type of decomposition 1. Thermal Decomposition 2. Electrolytic Decomposition 3. Sunlight Decomposition ● When the decomposition reaction carried by heat is called thermal decomposition. Example = 2FeSO4 --heat--- FE2O3 + SO2 + SO3 ● When the decomposition reaction carried by ELECTRIC current is called electrolytic decomposition. Example = H2 --electric current-- 2H + O2 ● When the decomposition reaction carried by sunlight is called sunlight decomposition. Example 2AgCl --sunlight-- 2Ag + Cl2 ◆ importance of decomposition reaction in Metal Industries ● Electrolytic is used in the extraction of metal from their naturally occurring compounds, generally chloride and Oxides. ● Thermal decomposition is used for the production of CaO (Calcium OXIDE). from carbonate which is a major constitute of cement. ● Molten NaCl is electrolytically decomposed to form sodium metal. ● Aluminium metal is obtained by electric decomposition of bauxite ore mixed with cryolite. HOPE ITS HELPS YOU...... ANY DOUBTS YOU CAN ASK ME.... THANK YOU.....

Discussion

13.	Define the property of catenation of carbon
Answer» Carbon has unique ABILITY to form bonds with other ATOM of carbon,it GIVE RISE to large molecules. This property is called catenation.

Discussion

14.	The nodal plane in the π-bond of ethene is located inthe molecular planea plane parallel to the molecular planea plane perpendicular to the molecular plane which bisects the carbon-carbon sigma bond at right anglesa plane perpendicular to the molecular plane which contains the carbon-carbon σ - bond
Answer» Formation of a π-bond OCCURS by the sideways overlap of p-orbitals of two C-atoms.The molecular plane does not have any π-electron density SINCE the p-orbitals are perpendicular to the plane containing the ethene molecule.The NODAL plane in the π-bond of ethene is LOCATED in the molecular plane. Hence (a) is the correct option. Hope it helps MARK brainliest if you liked my answer

Discussion

15.	How do non metals react with hydrogen
Answer» Here Is Your ANSWER My Friend...(^_^) Non-metals react with hydrogen to form covalent hydrides. For example, NITROGEN, OXYGEN, sulphur and chlorine react with hydrogen to form ammonia, water, hydrogen sulphide and hydrogen CHLORIDE, respectively. ✨Hope It Helps You....♥️♥️❣️❣️✌️✌️⏩ ✨If Yes Then Mark Me As BRAINLIEST Please

Discussion

16.	what do you observe when you add sodium bicarbonate to acetic acid how would you identify the gas released in the reaction describe briefly
Answer» Heyaa☺ ______________________ When sodium bicarbonate is added to acetic acid then the REACTION is exothermic.The gas that release is carbondioxide. ➡We find that carbondioxide is released, this can be find by KEEPING limewater.when CO2 releases it turns into white. ________________________ Hope you UNDERSTAND..✌ #Bebrainly Together we go far.

Discussion

17.	Calculate the extent of hydrolysis of 0.005 M K2CrO4. [K2= 3.1 *10^-7 for H2CrO4]
Answer» HERE IS YOUR ANSWER CrO4^-2 + HOH ==> HCrO4^- + OH^- Kh = KB = (KW/k2) = (HCrO4^-)(OH^-)/(CrO4^-2) You know (CrO4^-2), Kw, and k2. (HCrO4^-) = (OH^-) = x. Solve for x to determine (HCrO4^-), then extent hydrolysis = (HCrO4^-)/(CrO4^-2). PLEASE MARK BRAINLIEST HOPE IT HELPED BE BRAINLY!!!!!!!!!!!!! THANKS

17.

Calculate the extent of hydrolysis of 0.005 M K2CrO4. [K2= 3.1 *10^-7 for H2CrO4]

Answer»

HERE IS YOUR ANSWER

CrO4^-2 + HOH ==> HCrO4^- + OH^-

Kh = KB = (KW/k2) =

(HCrO4^-)(OH^-)/(CrO4^-2)

You know (CrO4^-2), Kw, and k2. (HCrO4^-) = (OH^-) = x.

Solve for x to determine (HCrO4^-), then extent hydrolysis = (HCrO4^-)/(CrO4^-2).

PLEASE MARK BRAINLIEST

HOPE IT HELPED

BE BRAINLY!!!!!!!!!!!!!

THANKS

Discussion

18.	State one reason for placing the Mg and Ca in the same group of the modern periodic table
Answer» Both Mg and Ca have 2 electron in their valence SHELLS, so they have SIMILAR PROPERTIES. Hence, they are placed in same group

Discussion

19.	Emulsion detail?????????????
Answer» HI HERE IS YOUR ANSWER, In some cases, OIL has certain CHARACTERISTICS that you want to use, but water also has some USEFUL properties. If you want to combine these you will need something that holds them together. This third party would be an emulsion. The mixture you END up with is reffered to as an emulsion. HOPE IT HELPED PLEASE MARK BRAINLIEST BE BRAINLY!!!!!!

19.

Emulsion detail?????????????

Answer»

HI HERE IS YOUR ANSWER,

In some cases, OIL has certain CHARACTERISTICS that you want to use, but water also has some USEFUL properties. If you want to combine these you will need something that holds them together. This third party would be an emulsion. The mixture you END up with is reffered to as an emulsion.

HOPE IT HELPED

PLEASE MARK BRAINLIEST

BE BRAINLY!!!!!!

Discussion

20.	. Which of the following metals are refined byelectrolytic refining?(i) Au (ii) Cu(iii) Zn (iv) K(1) (i) and (ii) (2) (ii) and (iii)(3) (i), (ii), (iii) (4) (ii), (iii) and (iv)
Answer» AMMONIUM and COPPER.

Discussion

21.	What is precipitation reaction
Answer» Here is your answer, Precipitation REACTION- The reaction in which a while COLOURED POWDER substance, insoluble in WATER is formed is known as Precipitation reaction. HOPE IT HELPS YOU !!!

Discussion

22.	Fe2O3+H2--> equation
Answer» Its FE + H2O hope it HELPS

Discussion

23.	The spectrum of helium is expected to be similar to
Answer» HI here is your answer Li⁺ Both He and Li⁺ CONTAIN 2 electrons each therefore their SPECTRUM will be similar. HOPE IT HELPED PLEASE MARK BRAINLIEST BE BRAINLY!!!!!!!!

23.

The spectrum of helium is expected to be similar to

Answer»

HI here is your answer

Li⁺

Both He and Li⁺ CONTAIN 2 electrons each therefore their SPECTRUM will be similar.

HOPE IT HELPED

PLEASE MARK BRAINLIEST

BE BRAINLY!!!!!!!!

Discussion

24.	Give at least 10examples of materials from daily life where electroplating is used.
Answer» Some uses of Electroplating are ―― Some metals are considered far more ATTRACTIVE and valuable than others, gold and silver being the oldest and most obvious examples. But gold and silver are rare and EXPENSIVE. Through electroplating, a very thin LAYER of gold or silver can coat a less valuable metal, making a final product with all the luster and beauty of those rare metals, at a fraction of the cost. This was the first commercial application of electroplating, and has been in use since the early 1800s. Thin layers of chromium are often used on APPLIANCES and automobiles to produce a pleasant, shiny appearance. Protection Electroplating can also protect surfaces by covering them with a thin layer of metal that will be more resistant to corrosion than the material of which they are primarily composed. Zinc and cadmium protect the underlying surface by being more reactive, corroding before the base metal underneath. Copper, nickel and chromium work by forming a protective, un-reactive coating. Conductivity Gold and silver are excellent conductors of electricity, but they are, as noted, prohibitively expensive. Through electroplating techniques, very small amounts of these precious, highly conductive metals can be incorporated into electronic components and integrated circuits. Cell phones, computers and other electronic devices all use electroplating techniques in their circuits. Other Uses While beauty, protection from corrosion, and electrical conductivity are the PROPERTIES most commonly imparted through electroplating, as described above, electroplating can also be used to reduce friction, protect from abrasion, protect from radiation, or otherwise impart desired characteristics to a surface that lacks those properties. Electroplating is also used not to impart the properties of the electroplating substance, but simply to control the size of machine parts. Electroplating allows undersized parts to be thickened precisely to the desired size.

24.

Give at least 10examples of materials from daily life where electroplating is used.

Answer»

Some uses of Electroplating are ――

Some metals are considered far more ATTRACTIVE and valuable than others, gold and silver being the oldest and most obvious examples. But gold and silver are rare and EXPENSIVE. Through electroplating, a very thin LAYER of gold or silver can coat a less valuable metal, making a final product with all the luster and beauty of those rare metals, at a fraction of the cost. This was the first commercial application of electroplating, and has been in use since the early 1800s. Thin layers of chromium are often used on APPLIANCES and automobiles to produce a pleasant, shiny appearance.

Protection

Electroplating can also protect surfaces by covering them with a thin layer of metal that will be more resistant to corrosion than the material of which they are primarily composed. Zinc and cadmium protect the underlying surface by being more reactive, corroding before the base metal underneath. Copper, nickel and chromium work by forming a protective, un-reactive coating.

Conductivity

Gold and silver are excellent conductors of electricity, but they are, as noted, prohibitively expensive. Through electroplating techniques, very small amounts of these precious, highly conductive metals can be incorporated into electronic components and integrated circuits. Cell phones, computers and other electronic devices all use electroplating techniques in their circuits.

Other Uses

While beauty, protection from corrosion, and electrical conductivity are the PROPERTIES most commonly imparted through electroplating, as described above, electroplating can also be used to reduce friction, protect from abrasion, protect from radiation, or otherwise impart desired characteristics to a surface that lacks those properties. Electroplating is also used not to impart the properties of the electroplating substance, but simply to control the size of machine parts. Electroplating allows undersized parts to be thickened precisely to the desired size.

Discussion

25.	Name the method of refining of nickel and give relevant chemicla equations
Answer» HI HERE IS YOUR ANSWER NICKEL is refined by MOND's process .In this process, nickel is heated in the presence of carbon MONOXIDE to FORM nickel tetracarbonyl, which is a volatile complex. Then, the obtained nickel tetracarbonyl is decomposed by subjecting it to a HIGHER temperature (450-470) to obtain nickel metal. NI + 4CO2------------->NI(co)4 NI(CO)4--------------------->NI +CO HOPE IT HELPED PLEASE MARK BRAINLIEST BE BRAINLY!!!!!!!!!!!!!!!

25.

Name the method of refining of nickel and give relevant chemicla equations

Answer»

HI HERE IS YOUR ANSWER

NICKEL is refined by MOND's process .In this process, nickel is heated in the presence of carbon MONOXIDE to FORM nickel tetracarbonyl, which is a volatile complex. Then, the obtained nickel tetracarbonyl is decomposed by subjecting it to a HIGHER temperature (450-470) to obtain nickel metal.

NI + 4CO2------------->NI(co)4

NI(CO)4--------------------->NI +CO

HOPE IT HELPED

PLEASE MARK BRAINLIEST

BE BRAINLY!!!!!!!!!!!!!!!

Discussion

26.	I didn't understood about law of constant proportions for class 9
Answer» HI SIR HERE IS YOUR ANSWER, also known as the principle of constant proportions STATES that although the salinity of various SAMPLES of SEAWATER may vary, the ratio of major salts is constant. No matter how much the salinity increases or decreases in the ocean, the proportions of ions relative to each other remains constant. HOPE IT HELPED PLEASE MARK BRAINLIEST BE BRAINLY!!!!!

26.

I didn't understood about law of constant proportions for class 9

Answer»

HI SIR HERE IS YOUR ANSWER,

also known as the principle of constant proportions STATES that although the salinity of various SAMPLES of SEAWATER may vary, the ratio of major salts is constant. No matter how much the salinity increases or decreases in the ocean, the proportions of ions relative to each other remains constant.

HOPE IT HELPED

PLEASE MARK BRAINLIEST

BE BRAINLY!!!!!

Discussion

27.	For a reaction A + 2 B  C, the amount of Cformed by starting the reaction with 5 moles ofA and 8 moles of B is(1) 5 moles (2) 8 moles(3) 16 moles (4) 4 moles
Answer» hi here is your answer miss, A= 5 moles, i.e. 5/1=5 B=8 moles, i.e. 8/2=4 => B is the limiting reagent. We should also KEEP in mind that the PRODUCT will be produced only until the limiting reagent is present, i.e., the amount of product formed is governed by the limiting reagent. Therefore, amount of C produced is equal to 1 unit(as CALCULATED above) that is equal to 4 moles. HOPE IT HELPED PLEASE MARK BRAINLIEST BE BRANILY!!!

27.

For a reaction A + 2 B  C, the amount of Cformed by starting the reaction with 5 moles ofA and 8 moles of B is(1) 5 moles (2) 8 moles(3) 16 moles (4) 4 moles

Answer»

hi here is your answer miss,

A= 5 moles, i.e. 5/1=5

B=8 moles, i.e. 8/2=4

=> B is the limiting reagent.

We should also KEEP in mind that the PRODUCT will be produced only until the limiting reagent is present, i.e., the amount of product formed is governed by the limiting reagent.

Therefore, amount of C produced is equal to 1 unit(as CALCULATED above) that is equal to 4 moles.

HOPE IT HELPED

PLEASE MARK BRAINLIEST

BE BRANILY!!!

Discussion

28.	among these elements which one has the most metallic character?Boron,aluminium gallium,indium,thallium.
Answer» Aluminum is the ELEMENT which has most metallic character. Hope it helps MARK me as BRAINLIEST.

Discussion

29.	LPG in a gas cylinder is in the form of liquid . wich physical and chemical changes occur when it comes out of the cylinder and burns?
Answer» Here is your answer LPG in a gas cylinder is in the FORM of liquid . with physical CHANGE. When the Lpg gas comes out of the burner then. it is a physical change. LPG in a gas cylinder is in the form of liquid with CHEMICAL changes. when a change occurs from liquid to gaseous form and then the gas burns it is chemical change. Hope it HELPS you

29.

LPG in a gas cylinder is in the form of liquid . wich physical and chemical changes occur when it comes out of the cylinder and burns?

Answer»

Here is your answer

LPG in a gas cylinder is in the FORM of liquid . with physical CHANGE.

When the Lpg gas comes out of the burner then. it is a physical change.

LPG in a gas cylinder is in the form of liquid with CHEMICAL changes.

when a change occurs from liquid to gaseous form and then the gas burns it is chemical change.

Hope it HELPS you

Discussion

30.	Explain the relation between carbon dioxide and greenhouse effect
Answer» The Carbon Dioxide Greenhouse Effect. In the 19TH century, scientists realized that GASES in the ATMOSPHERE cause a "greenhouse effect" which affects the planet's temperature. ... KEELING measured the LEVEL of carbon dioxide in the atmosphere: it was rising fast.

Discussion

31.	Distinguish between chlorocyclohexane and chlorobenzene using lucas test
Answer» CHLORO Cyclohexane and CHLOROBENZENE gives different products with SILVER nitrate(AgNO3 ) as; Chlorobenzene do not reacts with 2%Ethanolic silver nitrate SOLUTION but chloro cyclohexane reacts with 2% Ethanolic silver nitrate solution to give a white precipitate. It is because in chlorocyclohexane , the C-Cl bond is of sp3 hybridization, which follows nucleophilic reaction, but in chlorobenzene , the C-Cl bond is related with an sp2hybridized CARBON atom and the C-Cl bond has a partial double bond character due to resonance, so it does not undergo nucleophilic reaction.

Discussion

32.	The temperature at which the intermolecular attraction force balances the intermolecular repulsion force is known as________
Answer» BOILING TEMPERATURE......

Discussion

33.	Describe an experiment to show that change in state on heating
Answer» Heating ice CUBES is an experiment to SHOW that CHANGE its state on heating

Discussion

34.	What happens when hydrogen is added to a vegetable oil in the presence of a nickel name the reaction and write a one difference between the physical property of the vegetable oil and the product obtained in the reaction write the role of nickel in this reaction?
Answer» When hydrogen is added to a vegetable oil it CHANGES into a SOLID FORM called vanaspati ghee in the presence of NICKEL called catalyst through the process of hydrogenation.

Discussion

35.	When potassium chromate is added to solution of barium sulphate a precipitate of barium chromate is formed . Its colour ?
Answer» The color of barium chromate precipitate is Yellow. Explanation: The reactants involved in this REACTION are potassium chromate and barium sulfate. The potassium chromate is yellow and is in powdered form. Barium sulfate is WHITE and when it is mixed in water, it gives a solution which is milky white. The chemical equation involved in the given reaction is $K_2CrO_4+BaSO_4\rightarrow BaCrO_4$ As the potassium chromate salt is yellow, when it is added to the milky white solution of barium sulfate, a new compound CALLED barium chromate which is yellow is precipitated. Learn more about such concept The COLOUR of the precipitate formed when barium chloride solution reacts with SODIUM sulfate brainly.in/question/2465617 When you mixed solution of lead(II) nitrate and potassium iodide 1.what is the colour of precipitate formed? brainly.in/question/3659130

35.

When potassium chromate is added to solution of barium sulphate a precipitate of barium chromate is formed . Its colour ?

Answer»

The color of barium chromate precipitate is Yellow.

Explanation:

The reactants involved in this REACTION are potassium chromate and barium sulfate.
The potassium chromate is yellow and is in powdered form.
Barium sulfate is WHITE and when it is mixed in water, it gives a solution which is milky white.
The chemical equation involved in the given reaction is

$K_2CrO_4+BaSO_4\rightarrow BaCrO_4$

As the potassium chromate salt is yellow, when it is added to the milky white solution of barium sulfate, a new compound CALLED barium chromate which is yellow is precipitated.

Learn more about such concept

The COLOUR of the precipitate formed when barium chloride solution reacts with SODIUM sulfate

brainly.in/question/2465617

When you mixed solution of lead(II) nitrate and potassium iodide

1.what is the colour of precipitate formed?

brainly.in/question/3659130

Discussion

36.	Why the iron galvanized with zinc ?Can it be galvanized by with copper?If not why?
Answer» BCOZ zinc forms a protective COATING over the surface of IRON and it does not GET easily corroded,oxided,ETC

Discussion

37.	Prove that : √23+√528=2√3+√11
Answer» ĀNSWĒR ⬆⬆⬆⬆ THANKS ✌✌✌

Discussion

38.	How will you show experimentally that metals are good conductors od heat?
Answer» $Heya mate..❤❤ If we will place a flame and take aluminium or copper wire .We will feel the sensation of heat in our hands but in nonmetals it does not feel.$ HOPE it helps you my friend... PLEASE MARK it as BRAINLIEST...

Discussion

39.	What happens when steam is passed over red hot iron write the equation
Answer» If steam is PASSED over red hot IRON, it is CONVERTED into its magnetic oxide and hydrogen gas. If on the other hand, hydrogen is passed over heated magnetic oxide, it will change back to iron and steam. This REACTION can be made to proceed in both directions, so it is called REVERSIBLE reaction. PLEASE PLEASE MARK AS BRAINLIAST

Discussion

40.	What happens when sodium metal combines with chlorine gas ?
Answer» Sodium with CHLORINE #whether it is GAS # forms sodium CHLORIDE ..that is NACL ..... which is called COMMON salt....

Discussion

41.	Explain the formula verified experimentally as above regarding the images obtained in plane mirrors
Answer» Answer: Explanation: The initial segment (360/A) decides what number of AREAS the mirror makes. For instance 90 degrees would make four segments as found in the picture sent by you. The SECOND part (- 1) is the genuine ITEM which is additionally a piece of the areas shaped, and consequently is subtracted from the entire entirety as we REQUIRE just no. of pictures.

41.

Explain the formula verified experimentally as above regarding the images obtained in plane mirrors

Answer»

Answer:

Explanation:

The initial segment (360/A) decides what number of AREAS the mirror makes. For instance 90 degrees would make four segments as found in the picture sent by you. The SECOND part (- 1) is the genuine ITEM which is additionally a piece of the areas shaped, and consequently is subtracted from the entire entirety as we REQUIRE just no. of pictures.

Discussion

42.	C2h4 in bond line structure formula
Answer» EXPLANATION: H H C=H H ......... DOUBLE BOND

42.

C2h4 in bond line structure formula

Answer»

EXPLANATION:

H

H C=H

H .........

DOUBLE BOND

Discussion

43.	The name Mercury does not start with the letter h or small G and other symbol h small ji
Answer» Answer: THIS IS THE ANSWER HOPE IT HELPS Explanation: SYMBOL of MERCURY has been derived from its latin NAME Hydragyrum.

43.

The name Mercury does not start with the letter h or small G and other symbol h small ji

Answer»

Answer:

THIS IS THE ANSWER HOPE IT HELPS

Explanation:

SYMBOL of MERCURY has been derived from its latin NAME Hydragyrum.

Discussion

44.	which will be more stable (a) A2+ 1st Ionization energy +2nd Ionization energy = 1000 kj (b) B2+ 1st Ionization energy +2nd Ionization energy =5000kj (Can u please explain me in detail)
Answer» I don't KNOW this ANSWER of this QUESTION PLS. FORGIVE me

44.

which will be more stable (a) A2+ 1st Ionization energy +2nd Ionization energy = 1000 kj (b) B2+ 1st Ionization energy +2nd Ionization energy =5000kj (Can u please explain me in detail)

Answer»

I don't KNOW this ANSWER of this QUESTION PLS. FORGIVE me

Discussion

45.	Why is Tl(OH)3 basic?
Answer» ANSWER: Thallium(III) hydroxide, Tl(OH)3, also known as thallic hydroxide, is a hydroxide of thallium. It is a white solid.Thallium(III) hydroxide is a very WEAK BASE; it is CHANGED to thallium(III) ion, Tl3+, only in strongly ACID conditions. Explanation: here is your answer ☺️!

45.

Why is Tl(OH)3 basic?

Answer»

ANSWER:

Thallium(III) hydroxide, Tl(OH)3, also known as thallic hydroxide, is a hydroxide of thallium. It is a white solid.Thallium(III) hydroxide is a very WEAK BASE; it is CHANGED to thallium(III) ion, Tl3+, only in strongly ACID conditions.

Explanation:

here is your answer ☺️!

Discussion

46.	How ethyl bromide is converted into ethyl amine
Answer» ANSWER: C2H5BR + H NH2. ~ C2H5NH2. + HBR

46.

How ethyl bromide is converted into ethyl amine

Answer»

ANSWER:

C2H5BR + H NH2. ~ C2H5NH2. + HBR

Discussion

47.	What is rodox concept ? Give an example.
Answer» An oxidation-reduction reaction is any CHEMICAL reaction in which the oxidation number of a molecule, ATOM, or ion changes by gaining or losing an electron. The FORMATION of HYDROGEN FLUORIDE is an example of a redox reaction. We can break the reaction down to analyze the oxidation and reduction of reactants.

Discussion

48.	How many orbits are possible for n:4
Answer» ANSWER: 'n' INDICATES TOTAL no.of ORBITS. Explanation: total no of orbits =4

48.

How many orbits are possible for n:4

Answer»

ANSWER:

'n' INDICATES TOTAL no.of ORBITS.

Explanation:

total no of orbits =4

Discussion

49.	In Nunclear reactor, the moderator is
Answer» Answer: The moderator of a nuclear reactor is a substance that slows neutrons down. In traditional nuclear reactors, the moderator is the same THING as the COOLANT: it's water! When fast neutrons strike the hydrogen ATOMS in H2O, they SLOW down a lot (like a BILLIARD ball striking another).

49.

In Nunclear reactor, the moderator is

Answer»

Answer:

The moderator of a nuclear reactor is a substance that slows neutrons down. In traditional nuclear reactors, the moderator is the same THING as the COOLANT: it's water! When fast neutrons strike the hydrogen ATOMS in H2O, they SLOW down a lot (like a BILLIARD ball striking another).

Discussion

50.	Describe a galvanic cell with cell reactions
Answer» ANSWER: Galvanic CELLS, also known as voltaic cells, are electrochemical cells in which spontaneous oxidation-reduction reactions produce ELECTRICAL energy. ... The reaction MAY be split into its two half-reactions. Half-reactions separate the oxidation from the reduction, so each can be CONSIDERED individually.

50.

Describe a galvanic cell with cell reactions

Answer»

ANSWER:

Galvanic CELLS, also known as voltaic cells, are electrochemical cells in which spontaneous oxidation-reduction reactions produce ELECTRICAL energy. ... The reaction MAY be split into its two half-reactions. Half-reactions separate the oxidation from the reduction, so each can be CONSIDERED individually.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How many types of Crystal are found

in an experiment to study the properties of Acetic Acid answer the following question name the substance which on addition to acetic acid produce carbon dioxide and how carbon dioxide as it is tested in laboratory

Slove the equation in full process

balance this equation. mercurous nitrate --> Mercury + Nitrogen dioxide + oxygen

Balance 26 number please and provide me the answer

Ch3-ch2-ch2-oh in presence of conc h2so4

The decreasing order of reactivity of the metal is...............

CaO +HCl=CaCl2 +H2O balance the following chemical equation

Whydoes hydrogen occur in diatomic state rather than in monoatomic form under normal conditions?

Why has hydrogen been placed in the first group of periodic table being a non metal

Draw and write the names of any 2 structural isomers of c5h12

What are the importance of decomposition reaction in Metal Industries give answer with three points

Define the property of catenation of carbon

How do non metals react with hydrogen

what do you observe when you add sodium bicarbonate to acetic acid how would you identify the gas released in the reaction describe briefly

Calculate the extent of hydrolysis of 0.005 M K2CrO4. [K2= 3.1 *10^-7 for H2CrO4]

HERE IS YOUR ANSWER

Solve for x to determine (HCrO4^-), then extent hydrolysis = (HCrO4^-)/(CrO4^-2).

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State one reason for placing the Mg and Ca in the same group of the modern periodic table

Both Mg and Ca have 2 electron in their valence SHELLS, so they have SIMILAR PROPERTIES. Hence, they are placed in same group

Emulsion detail?????????????

HI HERE IS YOUR ANSWER,

In some cases, OIL has certain CHARACTERISTICS that you want to use, but water also has some USEFUL properties. If you want to combine these you will need something that holds them together. This third party would be an emulsion. The mixture you END up with is reffered to as an emulsion.

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. Which of the following metals are refined byelectrolytic refining?(i) Au (ii) Cu(iii) Zn (iv) K(1) (i) and (ii) (2) (ii) and (iii)(3) (i), (ii), (iii) (4) (ii), (iii) and (iv)

What is precipitation reaction

Fe2O3+H2--> equation

The spectrum of helium is expected to be similar to

HI here is your answer

Li⁺

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Give at least 10examples of materials from daily life where electroplating is used.

Name the method of refining of nickel and give relevant chemicla equations

NICKEL is refined by MOND's process .In this process, nickel is heated in the presence of carbon MONOXIDE to FORM nickel tetracarbonyl, which is a volatile complex. Then, the obtained nickel tetracarbonyl is decomposed by subjecting it to a HIGHER temperature (450-470) to obtain nickel metal.

NI + 4CO2------------->NI(co)4

NI(CO)4--------------------->NI +CO

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I didn't understood about law of constant proportions for class 9

HI SIR HERE IS YOUR ANSWER,

also known as the principle of constant proportions STATES that although the salinity of various SAMPLES of SEAWATER may vary, the ratio of major salts is constant. No matter how much the salinity increases or decreases in the ocean, the proportions of ions relative to each other remains constant.

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For a reaction A + 2 B  C, the amount of Cformed by starting the reaction with 5 moles ofA and 8 moles of B is(1) 5 moles (2) 8 moles(3) 16 moles (4) 4 moles

hi here is your answer miss,

Therefore, amount of C produced is equal to 1 unit(as CALCULATED above) that is equal to 4 moles.

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among these elements which one has the most metallic character?Boron,aluminium gallium,indium,thallium.

LPG in a gas cylinder is in the form of liquid . wich physical and chemical changes occur when it comes out of the cylinder and burns?

Here is your answer

Explain the relation between carbon dioxide and greenhouse effect

Distinguish between chlorocyclohexane and chlorobenzene using lucas test

The temperature at which the intermolecular attraction force balances the intermolecular repulsion force is known as________

Describe an experiment to show that change in state on heating

What happens when hydrogen is added to a vegetable oil in the presence of a nickel name the reaction and write a one difference between the physical property of the vegetable oil and the product obtained in the reaction write the role of nickel in this reaction?

When potassium chromate is added to solution of barium sulphate a precipitate of barium chromate is formed . Its colour ?

The color of barium chromate precipitate is Yellow.

Explanation:

Why the iron galvanized with zinc ?Can it be galvanized by with copper?If not why?

Prove that : √23+√528=2√3+√11

How will you show experimentally that metals are good conductors od heat?

What happens when steam is passed over red hot iron write the equation

What happens when sodium metal combines with chlorine gas ?

Explain the formula verified experimentally as above regarding the images obtained in plane mirrors

C2h4 in bond line structure formula​

H

H C=H

C2h4 in bond line structure formula

The name Mercury does not start with the letter h or small G and other symbol h small ji

which will be more stable (a) A2+ 1st Ionization energy +2nd Ionization energy = 1000 kj (b) B2+ 1st Ionization energy +2nd Ionization energy =5000kj (Can u please explain me in detail)

How ethyl bromide is converted into ethyl amine

What is rodox concept ? Give an example.

In Nunclear reactor, the moderator is