52639 + Interview Questions in Secondary School in Chemistry

1.	2g of each P4 and O2 are mixedCompletely to form P4o6max P4O6 and P4O10, will mass of P4O6 and P4O10 will form
Answer» ANSWER: HhhjjiiyfddwwXvbmmkppppoiijjjjhiyiyotprpewodjcnclooejieeoqqoqoeieirirfiittittitt

1.

2g of each P4 and O2 are mixedCompletely to form P4o6max P4O6 and P4O10, will mass of P4O6 and P4O10 will form

Answer»

ANSWER:

HhhjjiiyfddwwXvbmmkppppoiijjjjhiyiyotprpewodjcnclooejieeoqqoqoeieirirfiittittitt

Discussion

2.	Haemoglobin contains 3.33% by mass of iron. There are 2 atoms in one molecular of haemoglobin. What is the relative molecular mass of haemoglobin?
Answer» ANSWER: FUN K uxhyxhchch gxgxhcnvfuck UUUUUUU

2.

Haemoglobin contains 3.33% by mass of iron. There are 2 atoms in one molecular of haemoglobin. What is the relative molecular mass of haemoglobin?

Answer»

ANSWER:

FUN K uxhyxhchch

gxgxhcnvfuck UUUUUUU

Discussion

3.	Limitations of the diensional method?
Answer» ANSWER: Limitations of dimensional method ... Numerical constants having no dimensions cannot be OBTAINED method of dimensions . EQUATIONS using trigonometric , exponential can not be decuded. If dimensions are given , PHYSICALLY quantity MAY not be unique as many physical quantities have same dimensions.

3.

Limitations of the diensional method?

Answer»

ANSWER:

Limitations of dimensional method ... Numerical constants having no dimensions cannot be OBTAINED method of dimensions . EQUATIONS using trigonometric , exponential can not be decuded. If dimensions are given , PHYSICALLY quantity MAY not be unique as many physical quantities have same dimensions.

Discussion

4.	State law of definate proportion
Answer» Answer: Image result for state law of definite proportion Image result for state law of definite proportion Image result for state law of definite proportion Image result for state law of definite proportion Image result for state law of definite proportion Image result for state law of definite proportion Image result for state law of definite proportion Image result for state law of definite proportion Image result for state law of definite proportion Image result for state law of definite proportion View all DescriptionIn chemistry, the law of definite proportion, sometimes CALLED Proust's law or the law of definite composition, or law of constant composition states that a given chemical compound ALWAYS contains its component elements in fixed ratio and does not DEPEND on its SOURCE and method of PREPARATION

4.

State law of definate proportion

Answer»

Answer:

Image result for state law of definite proportion

View all

DescriptionIn chemistry, the law of definite proportion, sometimes CALLED Proust's law or the law of definite composition, or law of constant composition states that a given chemical compound ALWAYS contains its component elements in fixed ratio and does not DEPEND on its SOURCE and method of PREPARATION

Discussion

5.	0.44 gram of gas occupies 224 ml at STP its vapour density is
Answer» Answer: Molecular mass=2vapour DENSITY =211.2 =22.4 g At NTP, volume occupied by 22.4 g of gas= 22.4 l volume of 11.2g gas = 22.4/22.4*11.2 = 11.2 l

5.

0.44 gram of gas occupies 224 ml at STP its vapour density is

Answer»

Answer:

Molecular mass=2*vapour DENSITY

=2*11.2

=22.4 g

At NTP,

volume occupied by 22.4 g of gas= 22.4 l

volume of 11.2g gas = 22.4/22.4*11.2

= 11.2 l

Discussion

6.	An electron in a hydrogen atom find itself in the fourth energy level(1) write down a list of the orbitals that it might be in.(2) can it be in all f these orbitals at once?(3) can you tell which orbital it is in ?
Answer» Answer: Explanation: In hydrogen atom there’s only one ELECTRON. Hence at ground state it will be of configuration 1s¹. But when it will be excited to fourth energy state. The configuration will look like: - 1s0 2s0 2p0 3s0 3p0 3d0 4s¹ 4p0 4d0 4f0. Now it can be in either of 4s 4p or 4d orbital but it cannot be in 4f orbital. Because it will go to 5S otherwise because 5s takes lesser energy than 4f. It will be CURRENTLY in 4s orbital. On further excitation of electron it will MOVE to 4p or 4d.

6.

An electron in a hydrogen atom find itself in the fourth energy level(1) write down a list of the orbitals that it might be in.(2) can it be in all f these orbitals at once?(3) can you tell which orbital it is in ?

Answer»

Answer:

Explanation: In hydrogen atom there’s only one ELECTRON. Hence at ground state it will be of configuration 1s¹.

But when it will be excited to fourth energy state. The configuration will look like: -

1s0 2s0 2p0 3s0 3p0 3d0 4s¹ 4p0 4d0 4f0.

Now it can be in either of 4s 4p or 4d orbital but it cannot be in 4f orbital. Because it will go to 5S otherwise because 5s takes lesser energy than 4f.

It will be CURRENTLY in 4s orbital. On further excitation of electron it will MOVE to 4p or 4d.

Discussion

7.	Assertion reason type -a) statement 1 is true , statement 2 is true and is correct explanation of 1 b ) both are correct but 2 doesn't explain 1 c ) 1 is true but 2 is false c) 1 is false but 2 is trueQ) Statement 1 - Ionic compounds tend to be non volatileStatement 2 - intermolecular forces in these compounds are weak
Answer» Answer: C ) 1 is true but 2 is false . Explanation: IONIC COMPOUNDS have strong ionic for ES /bonds hence are NON volatile.

7.

Assertion reason type -a) statement 1 is true , statement 2 is true and is correct explanation of 1 b ) both are correct but 2 doesn't explain 1 c ) 1 is true but 2 is false c) 1 is false but 2 is trueQ) Statement 1 - Ionic compounds tend to be non volatileStatement 2 - intermolecular forces in these compounds are weak

Answer»

Answer:

C ) 1 is true but 2 is false .

Explanation:

IONIC COMPOUNDS have strong ionic for ES /bonds hence are NON volatile.

Discussion

8.	The order of strength of hydrogen bond is :(A) CI-H.....CI > N-N.....N>O-H.....O > F-H.....F(B) N-H.....N> CI-H.....CI>O-H.....O > F-H....F(C) O-H.....O>N-H.....N>CI-H....CI>F-H.....F(D) F-H.....F>O-H.....O>N-H.....N > CI-H.....CI
Answer» ANSWER: Don't KNOW SRY.............

8.

The order of strength of hydrogen bond is :(A) CI-H.....CI > N-N.....N>O-H.....O > F-H.....F(B) N-H.....N> CI-H.....CI>O-H.....O > F-H....F(C) O-H.....O>N-H.....N>CI-H....CI>F-H.....F(D) F-H.....F>O-H.....O>N-H.....N > CI-H.....CI

Answer»

ANSWER:

Don't KNOW SRY.............

Discussion

9.	Pls tell fast pls pls pls pls
Answer» ANSWER: Don't KNOW SRY........

9.

Pls tell fast pls pls pls pls

Answer»

ANSWER:

Don't KNOW SRY........

Discussion

10.	Write the industrial uses and metalurgical uses of hydrogen also expalin use of hydrogen in space and welding and cutting
Answer» ANSWER: Mark me BRAINLIEST so that you GET 20 points.I will GIVE you 10 more points.

Discussion

11.	While diluting an acid why it is recommended that acid should be added to water and not water to acid ?
Answer»

Discussion

12.	Which of the substance is pure substance, substance are Gasoline, Distilled water, iodised table salt ,LPG
Answer» ANSWER: · It's gasoline and liquefied petroleum gas. Distilled WATER is not a mixture it is PURE substance because in this water all its components like salt and minerals are SEPARATED

12.

Which of the substance is pure substance, substance are Gasoline, Distilled water, iodised table salt ,LPG

Answer»

ANSWER:

· It's gasoline and liquefied petroleum gas. Distilled WATER is not a mixture it is PURE substance because in this water all its components like salt and minerals are SEPARATED

Discussion

13.	Hello friends ❤❤❤good moorning ✌✌what is plank's quantum theory and what is plank's constant?
Answer» $\huge\star{\bold{\underline{\boxed{\blue{\mathcal{Answer}}}}}}$ $\huge\star{\undeline{\red{\tt{<klux>PLANK</klux>'s\:Quantum\:Theory}}}}$ ________________________ Definition: According to this Theory the SMALLEST amount of energy that can be emitted or absorbed in the form of electromagnetic radiation is known as Quantum. _______________________ Plank's Constant: "h" is the plank's constant which has an Approx VALUE of 6.625 x 10^-34 kg/s

13.

Hello friends ❤❤❤good moorning ✌✌what is plank's quantum theory and what is plank's constant?

Answer»

$\huge\star{\bold{\underline{\boxed{\blue{\mathcal{Answer}}}}}}$

$\huge\star{\undeline{\red{\tt{<klux>PLANK</klux>'s\:Quantum\:Theory}}}}$

________________________

Definition:

According to this Theory the SMALLEST amount of energy that can be emitted or absorbed in the form of electromagnetic radiation is known as Quantum.

_______________________

Plank's Constant:

"h" is the plank's constant which has an Approx VALUE of 6.625 x 10^-34 kg/s

Discussion

14.	Write five properties each for p-block and d-block elements.
Answer» <P>Answer: The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered COLUMNS, or GROUPS. The elements in each group have the same number of valence electrons. As a result, elements in the same group OFTEN display similar properties and reactivity Explanation:hope this help uh dear please MARK me as a brainliest

14.

Write five properties each for p-block and d-block elements.

Answer»

<P>Answer:

The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered COLUMNS, or GROUPS. The elements in each group have the same number of valence electrons. As a result, elements in the same group OFTEN display similar properties and reactivity

Explanation:hope this help uh dear please MARK me as a brainliest

Discussion

15.	Calculate the amount of molecules in 5 grams c2h6
Answer» EXPLANATION: MOLE of C2H6 = 5/30 = 1/6 mole. No. of MOLECULES = 1/6 × 6.022 × 10^23 = 10^23 molecules....

15.

Calculate the amount of molecules in 5 grams c2h6

Answer»

EXPLANATION:

MOLE of C2H6 = 5/30

= 1/6 mole.

No. of MOLECULES = 1/6 × 6.022 × 10^23

= 10^23 molecules....

Discussion

16.	What is t (0.5) in terms of t(0.75) for first order reaction
Answer» ANSWER: the TERM of firlst REACTION is 0.75

16.

What is t (0.5) in terms of t(0.75) for first order reaction

Answer»

ANSWER:

the TERM of firlst REACTION is 0.75

Discussion

17.	Distinguish between a mixture and a compound of iron and sulphur using dil HCl.
Answer» ANSWER: HOPE.. This will HELP you..

17.

Distinguish between a mixture and a compound of iron and sulphur using dil HCl.

Answer»

ANSWER:

HOPE.. This will HELP you..

Discussion

18.	Note on dipole dipole forces, dipole induced,induced dipole induced dipole,ion induced dipole
Answer» ANSWER: NOTE on DIPOLE dipole FORCES, dipole INDUCED,induced dipole induced dipole,ion induced dipole

18.

Note on dipole dipole forces, dipole induced,induced dipole induced dipole,ion induced dipole

Answer»

ANSWER:

NOTE on DIPOLE dipole FORCES, dipole INDUCED,induced dipole induced dipole,ion induced dipole

Discussion

19.	How to convert para hydrogen to orthohydrogen
Answer» Answer: Conversion of PARA into ortho hydrogen By treatment with CATALYSTS LIKE platinum or iron. By PASSING an electric discharge. By heating to 800oC or more. By mixing with paramagnetic molecules like O2, NO, NO2. By mixing with nascent hydrogen or atomic hydrogen. Explanation: please make me brainliest please

19.

How to convert para hydrogen to orthohydrogen

Answer»

Answer:

Conversion of PARA into ortho hydrogen

By treatment with CATALYSTS LIKE platinum or iron.

By PASSING an electric discharge.

By heating to 800oC or more.

By mixing with paramagnetic molecules like O2, NO, NO2.

By mixing with nascent hydrogen or atomic hydrogen.

Explanation:

please make me brainliest please

Discussion

20.	Hey guys what is transition contraction? please answer quickly,, please...
Answer» Answer: The d-block CONTRACTION (sometimes called scandide contraction) is a term USED in chemistry to DESCRIBE the effect of having full d orbitals on the PERIOD 4 elements. The elements in question are Ga, Ge, As, Se, BR, and Kr. Their electronic configurations include completely filled d orbitals (d10).

20.

Hey guys what is transition contraction? please answer quickly,, please...

Answer»

Answer:

The d-block CONTRACTION (sometimes called scandide contraction) is a term USED in chemistry to DESCRIBE the effect of having full d orbitals on the PERIOD 4 elements. The elements in question are Ga, Ge, As, Se, BR, and Kr. Their electronic configurations include completely filled d orbitals (d10).

Discussion

21.	Conclusion of p-block elements
Answer» Answer: P block ELEMENTS are only the component in which the last ELECTRON enters the peripheral p-subshell. P SQUARE components comprise of boron family, nitrogen family, oxygen family, FLUORINE family and ultimately the group of honorable gases that are neon family. Explanation: make me as BRAINALIEST answer

21.

Conclusion of p-block elements

Answer»

Answer:

P block ELEMENTS are only the component in which the last ELECTRON enters the peripheral p-subshell. P SQUARE components comprise of boron family, nitrogen family, oxygen family, FLUORINE family and ultimately the group of honorable gases that are neon family.

Explanation:

make me as BRAINALIEST answer

Discussion

22.	If 0.44 g of a colourless oxide of nitrogen occupies 224 ml at 1520 mm Hg and 273 °C,then the compound is :(a) N₂O (6) NO₂(c) NO4 (d) N2O2 use the formula pv= nrt and solve
Answer» Answer: (a) Explanation: According to the ideal gas EQUATION:' PV=nRTPV=nRT P= Pressure of the gas = 1520 mmHg = 2 atm V= Volume of the gas = 224 mL = 0.224 L T= Temperature of the gas = 273°C=(273+273)K=546 K (0°C = 273 K) R= Value of gas constant = 0.0821 Latm/K mol n=\frac{PV}{RT}=\frac{2\times 0.225L}{0.0821 \times 546}=0.010molesn= RT PV = 0.0821×546 2×0.225L =0.010moles To calculate the MOLES, we use the equation: \text{Number of moles}=\frac{\text{Given MASS}}{\text {Molar mass}}Number of moles= Molar mass Given mass 0.010={0.44}{Molar mass}}0.010= Molar mass 0.44 {\text {Molar mass}}=44gMolar mass=44g

22.

If 0.44 g of a colourless oxide of nitrogen occupies 224 ml at 1520 mm Hg and 273 °C,then the compound is :(a) N₂O (6) NO₂(c) NO4 (d) N2O2 use the formula pv= nrt and solve

Answer»

Answer:

(a)

Explanation:

According to the ideal gas EQUATION:'

PV=nRTPV=nRT

P= Pressure of the gas = 1520 mmHg = 2 atm

V= Volume of the gas = 224 mL = 0.224 L

T= Temperature of the gas = 273°C=(273+273)K=546 K (0°C = 273 K)

R= Value of gas constant = 0.0821 Latm/K mol

n=\frac{PV}{RT}=\frac{2\times 0.225L}{0.0821 \times 546}=0.010molesn=

RT

PV

=

0.0821×546

2×0.225L

=0.010moles

To calculate the MOLES, we use the equation:

\text{Number of moles}=\frac{\text{Given MASS}}{\text {Molar mass}}Number of moles=

Molar mass

Given mass

0.010={0.44}{Molar mass}}0.010=

Molar mass

0.44

{\text {Molar mass}}=44gMolar mass=44g

Discussion

23.	Why metual sharing of electron has low m.p and b.p?
Answer» EXPLANATION: this is so because it is a COVALENT BOND and

23.

Why metual sharing of electron has low m.p and b.p?

Answer»

EXPLANATION:

this is so because it is a COVALENT BOND and

Discussion

24.	If momentum of an object is increased by 10% then its kinetic energy will increase by
Answer» ANSWER: It will be increased by 21% Let the initial mass of the body be m and its velocity be v. Initial MOMENTUM of the body = mv Initial KE = mv^2/2 If the momentum increases by 10%, NEW momentum = mv + 10% of mv = mv + 10/100mv = mv + mv/10 =11mv/10 =m(11v/10) New velocity = 11v/10 Increase in velocity = v/10 New KE = m(11v/10)^2/2 = 121/100mv^2/2 Increase in KE = 21%

24.

If momentum of an object is increased by 10% then its kinetic energy will increase by

Answer»

ANSWER:

It will be increased by 21%

Let the initial mass of the body be m and its velocity be v.

Initial MOMENTUM of the body = mv

Initial KE = mv^2/2

If the momentum increases by 10%, NEW momentum = mv + 10% of mv

= mv + 10/100mv

= mv + mv/10

=11mv/10

=m(11v/10)

New velocity = 11v/10

Increase in velocity = v/10

New KE = m(11v/10)^2/2

= 121/100mv^2/2

Increase in KE = 21%

Discussion

25.	What is guttta parcha
Answer» ANSWER: I don't KNOW?????????

25.

What is guttta parcha

Answer»

ANSWER:

I don't KNOW?????????

Discussion

26.	What method used to separate carbon from mixture of carbon and magnesium
Answer» Answer: SORRY do not know EXPLANATION: i COULD not find the answer

26.

What method used to separate carbon from mixture of carbon and magnesium

Answer»

Answer:

SORRY do not know

EXPLANATION:

i COULD not find the answer

Discussion

27.	Method for water purification
Answer» ANSWER: CHLORINATION,FILTRATION,BOILING are METHODS

27.

Method for water purification

Answer»

ANSWER:

CHLORINATION,FILTRATION,BOILING are METHODS

Discussion

28.	Lactic acid is a molecule,which shows;
Answer» ANSWER: LACTIC acid is present in CURD and dairy products

28.

Lactic acid is a molecule,which shows;

Answer»

ANSWER:

LACTIC acid is present in CURD and dairy products

Discussion

29.	Good afternoonPlease under which conditions will this reaction take place2Ag + Cu =Cu + 2Ag+
Answer» ANSWER: MAY be QUESTION is WRONG

29.

Good afternoonPlease under which conditions will this reaction take place2Ag + Cu =Cu + 2Ag+

Answer»

ANSWER:

MAY be QUESTION is WRONG

Discussion

30.	How has the use of CNG in motor vehicles reduced pollution in big cities?Explain
Answer» Answer: CNG is Compressed Natural gas , it mainly consists of ethane, propane and other heavier hydrocarbons which are compressed under high pressure. Very SMALL quantities of nitrogen, OXYGEN, carbon dioxide, sulfur compounds, and water may also be found in natural gas. But overall it is Compressed under TREMENDOUS pressure that small amount of carbon Dioxide RELEASE is negligible than that those vehicles that USE crude oil release much more carbon dioxide. Thus, CNG is another way of reducing pollution. HOPE THIS HELPS YOU mesananmubarak Pls mark as brainlest

30.

How has the use of CNG in motor vehicles reduced pollution in big cities?Explain

Answer»

Answer:

CNG is Compressed Natural gas , it mainly consists of ethane, propane and other heavier hydrocarbons which are compressed under high pressure. Very SMALL quantities of nitrogen, OXYGEN, carbon dioxide, sulfur compounds, and water may also be found in natural gas.

But overall it is Compressed under TREMENDOUS pressure that small amount of carbon Dioxide RELEASE is negligible than

that those vehicles that USE crude oil release much more carbon dioxide.

Thus, CNG is another way of reducing pollution.

HOPE THIS HELPS YOU mesananmubarak

Pls mark as brainlest

Discussion

31.	How many grams does an atoms of hydrogen weight?
Answer» ANSWER: 1.008 weight of HYDROGEN

31.

How many grams does an atoms of hydrogen weight?

Answer»

ANSWER:

1.008

weight of HYDROGEN

Discussion

32.	A 500mL bulb is filled with CH4 at a pressure of 1 atm and O2 at a pressure of 4 atm at 27°C. The mixture is then exploded when the reaction occursCH4+2O2=CO2+2H2OCalculate the pressure if the final temperature is 27°C and aqueous tension is 28.7 mmHg
Answer» Answer: Total PRESSURE is 4.96 atm If you LIKE the answer please MAKE as a brainliest answer to your question

32.

A 500mL bulb is filled with CH4 at a pressure of 1 atm and O2 at a pressure of 4 atm at 27°C. The mixture is then exploded when the reaction occursCH4+2O2=CO2+2H2OCalculate the pressure if the final temperature is 27°C and aqueous tension is 28.7 mmHg

Answer»

Answer:

Total PRESSURE is 4.96 atm

If you LIKE the answer please MAKE as a brainliest answer to your question

Discussion

33.	Is it true?that one mol of H contain avagadro no.of atoms
Answer» ANSWER: YES because ATOMIC NUMBER of HYDROGEN is 1

33.

Is it true?that one mol of H contain avagadro no.of atoms

Answer»

ANSWER:

YES because ATOMIC NUMBER of HYDROGEN is 1

Discussion

34.	What method used to separate gold from mixture of gold and magnesium
Answer» ANSWER: By *Cepellation* *PROCESS*

34.

What method used to separate gold from mixture of gold and magnesium

Answer»

ANSWER:

By Cepellation PROCESS

Discussion

35.	Minimum number of carbon atom in an alkane having one 4degree carbon
Answer» ANSWER: QUATERNARY CARBON ATOM (4° carbon)

35.

Minimum number of carbon atom in an alkane having one 4degree carbon

Answer»

ANSWER:

QUATERNARY CARBON ATOM (4° carbon)

Discussion

36.	What is inert gas radii
Answer» To FIND the radius of INERT gases, you should know about Van der Waal's radius. It is defined as half the distance between the nucleuses of TWO SEPARATELY covalently bonded homonuclear ATOMS.

Discussion

37.	What is molecular mass? Calculate the molecular mass of the following substance
Answer» ANSWER: MOLECULAR MASS mass is the mass of MOLECULES in COMPOUNDS

37.

What is molecular mass? Calculate the molecular mass of the following substance

Answer»

ANSWER:

MOLECULAR MASS mass is the mass of MOLECULES in COMPOUNDS

Discussion

38.	The value of K is 9.55 x 10-14 at a certain temperature. Calculate the pH of water at this temperature
Answer» ANSWER: PH is a 6.25 Explanation: SINCE pH is a smaller than 7 then an scid situation dissolved in WATER

38.

The value of K is 9.55 x 10-14 at a certain temperature. Calculate the pH of water at this temperature

Answer»

ANSWER:

PH is a 6.25

Explanation:

SINCE pH is a smaller than 7 then an scid situation dissolved in WATER

Discussion

39.	Solve it hurry up please
Answer» Answer: QUESTION NUMBER 9 SOLVE kro [email PROTECTED]$

39.

Solve it hurry up please

Answer»

Answer:

QUESTION NUMBER 9 SOLVE kro [email PROTECTED]$

Discussion

40.	Friedel Charles worked on synthesis of(A) benzene.(B) minerals.(C) organic compounds.(D) inorganic compounds.compounds
Answer» Friedel CHARLES worked on SYNTHESIS of 'minerals.' Explanation: Friedel Charles is known as a French CHEMIST and expert in mineralogy. He played a SIGNIFICANT role in the composition of minerals. He did some major works on the synthesis of minerals and one of the major creations includes 'Friedle-Craft Reactions.' Friedl-Crafts reaction involves alkylation of A aromatic rings together with alkyl halides using a strong catalyst as Lewis acids, such as aluminum chloride, ferric chloride, or other MXN reagents. In 1856, he EVEN became the manager of 'mineral compilation' in Paris' Mining School. Learn more: Friedel Charles brainly.in/question/9660941

40.

Friedel Charles worked on synthesis of(A) benzene.(B) minerals.(C) organic compounds.(D) inorganic compounds.compounds

Answer»

Friedel CHARLES worked on SYNTHESIS of 'minerals.'

Explanation:

Friedel Charles is known as a French CHEMIST and expert in mineralogy. He played a SIGNIFICANT role in the composition of minerals.

He did some major works on the synthesis of minerals and one of the major creations includes 'Friedle-Craft Reactions.' Friedl-Crafts reaction involves alkylation of A aromatic rings together with alkyl halides using a strong catalyst as Lewis acids, such as aluminum chloride, ferric chloride, or other MXN reagents.

In 1856, he EVEN became the manager of 'mineral compilation' in Paris' Mining School.

Learn more: Friedel Charles

brainly.in/question/9660941

Discussion

41.	Is oxygen a metal or nonmetal? Give Reasons..
Answer» ANSWER: OXYGEN is NON metal. Hope this HELPS

41.

Is oxygen a metal or nonmetal? Give Reasons..

Answer»

ANSWER:

OXYGEN is NON metal.

Hope this HELPS

Discussion

42.	Examples on object which is both physical and chemical properties
Answer» ANSWER: PLEASE COMPLETE your QUESTION...

42.

Examples on object which is both physical and chemical properties

Answer»

ANSWER:

PLEASE COMPLETE your QUESTION...

Discussion

43.	What is the Lewis structure for PO3-
Answer» Answer: PLS MARK brainliest see IMAGE for explaination

43.

What is the Lewis structure for PO3-

Answer»

Answer:

PLS MARK brainliest

see IMAGE for explaination

Discussion

44.	What is meant by molar volume of gas?
Answer» ANSWER: Volume OCCUPIED by 1 mole of a GAS at stp is the MOLAR volume (22.4 litres)

44.

What is meant by molar volume of gas?

Answer»

ANSWER: Volume OCCUPIED by 1 mole of a GAS at stp is the MOLAR volume (22.4 litres)

Discussion

45.	8. What is the unit of rate or velocity of a reaction
Answer» Answer: The units for RATE of reaction is mol dm-³ s-¹. Rate MEANS rate of change of CONCENTRATION of reactant per unit TIME.

45.

8. What is the unit of rate or velocity of a reaction

Answer»

Answer:

The units for RATE of reaction is mol dm-³ s-¹. Rate MEANS rate of change of CONCENTRATION of reactant per unit TIME.

Discussion

46.	Please solve it question hurry up
Answer» ANSWER: *Answer:why TRY it yourself*

46.

Please solve it question hurry up

Answer»

ANSWER:

Answer:why TRY it yourself

Discussion

47.	Please explain Electrolysis of Acidified water.
Answer» The FOLLOWING PICTURE MIGHT HELP you out.

47.

Please explain Electrolysis of Acidified water.

Answer»

The FOLLOWING PICTURE MIGHT HELP you out.

Discussion

48.	How will you obtain Silverchloride from silver nitrate
Answer» i THINK by CHLORINATION

Discussion

49.	Why sc does not exist as divalant?
Answer» Answer: Electronic configuration of Sc is 3p^63d^14s^2. It can LOOSE 2 electrons from outermost shell but it is not stable. So it lose 3 electrons to GET NOBLE gas configuration. Therefore Sc does not EXIST as divalant. hope it helps thnx

49.

Why sc does not exist as divalant?

Answer»

Answer:

Electronic configuration of Sc is 3p^63d^14s^2. It can LOOSE 2 electrons from outermost shell but it is not stable. So it lose 3 electrons to GET NOBLE gas configuration. Therefore Sc does not EXIST as divalant.

hope it helps

thnx

Discussion

50.	Which of the following is not a mixture?A. SoilB. AirC. SteamD. Milk
Answer» ANSWER: STEAM Explanation: Because in Evopration PROCESS AIR CONVERTS into steam.

50.

Which of the following is not a mixture?A. SoilB. AirC. SteamD. Milk

Answer»

ANSWER:

STEAM

Explanation:

Because in Evopration PROCESS AIR CONVERTS into steam.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

2g of each P4 and O2 are mixedCompletely to form P4o6max P4O6 and P4O10, will mass of P4O6 and P4O10 will form​

Haemoglobin contains 3.33% by mass of iron. There are 2 atoms in one molecular of haemoglobin. What is the relative molecular mass of haemoglobin?

Limitations of the diensional method?​

State law of definate proportion​

0.44 gram of gas occupies 224 ml at STP its vapour density is​

An electron in a hydrogen atom find itself in the fourth energy level(1) write down a list of the orbitals that it might be in.(2) can it be in all f these orbitals at once?(3) can you tell which orbital it is in ?

The order of strength of hydrogen bond is :(A) CI-H.....CI > N-N.....N>O-H.....O > F-H.....F(B) N-H.....N> CI-H.....CI>O-H.....O > F-H....F(C) O-H.....O>N-H.....N>CI-H....CI>F-H.....F(D) F-H.....F>O-H.....O>N-H.....N > CI-H.....CI​

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Write the industrial uses and metalurgical uses of hydrogen also expalin use of hydrogen in space and welding and cutting

While diluting an acid why it is recommended that acid should be added to water and not water to acid ?​

Which of the substance is pure substance, substance are Gasoline, Distilled water, iodised table salt ,LPG

Hello friends ❤❤❤good moorning ✌✌what is plank's quantum theory and what is plank's constant?​

Definition:

Plank's Constant:

Write five properties each for p-block and d-block elements.

Calculate the amount of molecules in 5 grams c2h6

What is t (0.5) in terms of t(0.75) for first order reaction

Distinguish between a mixture and a compound of iron and sulphur using dil HCl.

Note on dipole dipole forces, dipole induced,induced dipole induced dipole,ion induced dipole ​

How to convert para hydrogen to orthohydrogen

Hey guys what is transition contraction? please answer quickly,, please... ​

Conclusion of p-block elements

If 0.44 g of a colourless oxide of nitrogen occupies 224 ml at 1520 mm Hg and 273 °C,then the compound is :(a) N₂O (6) NO₂(c) NO4 (d) N2O2 use the formula pv= nrt and solve​

Why metual sharing of electron has low m.p and b.p?

If momentum of an object is increased by 10% then its kinetic energy will increase by​

What is guttta parcha​

What method used to separate carbon from mixture of carbon and magnesium ​

Method for water purification

Lactic acid is a molecule,which shows;

Good afternoonPlease under which conditions will this reaction take place2Ag + Cu =Cu + 2Ag+

How has the use of CNG in motor vehicles reduced pollution in big cities?Explain

How many grams does an atoms of hydrogen weight?​

A 500mL bulb is filled with CH4 at a pressure of 1 atm and O2 at a pressure of 4 atm at 27°C. The mixture is then exploded when the reaction occursCH4+2O2=CO2+2H2OCalculate the pressure if the final temperature is 27°C and aqueous tension is 28.7 mmHg​

Is it true?that one mol of H contain avagadro no.of atoms​

What method used to separate gold from mixture of gold and magnesium

Minimum number of carbon atom in an alkane having one 4degree carbon

What is inert gas radii​

What is molecular mass? Calculate the molecular mass of the following substance

The value of K is 9.55 x 10-14 at a certain temperature. Calculate the pH of water at this temperature​

Solve it hurry up please

Friedel Charles worked on synthesis of(A) benzene.(B) minerals.(C) organic compounds.(D) inorganic compounds.compounds​

Friedel CHARLES worked on SYNTHESIS of 'minerals.'

Is oxygen a metal or nonmetal? Give Reasons..​

Hope this HELPS

Examples on object which is both physical and chemical properties

PLEASE COMPLETE your QUESTION...

What is the Lewis structure for PO3-

PLS MARK brainliest

What is meant by molar volume of gas?​

8. What is the unit of rate or velocity of a reaction​

Please solve it question hurry up

ANSWER:

Please explain Electrolysis of Acidified water. ​

How will you obtain Silverchloride from silver nitrate

Why sc does not exist as divalant?

Which of the following is not a mixture?A. SoilB. AirC. SteamD. Milk

2g of each P4 and O2 are mixedCompletely to form P4o6max P4O6 and P4O10, will mass of P4O6 and P4O10 will form

Limitations of the diensional method?

State law of definate proportion

0.44 gram of gas occupies 224 ml at STP its vapour density is

The order of strength of hydrogen bond is :(A) CI-H.....CI > N-N.....N>O-H.....O > F-H.....F(B) N-H.....N> CI-H.....CI>O-H.....O > F-H....F(C) O-H.....O>N-H.....N>CI-H....CI>F-H.....F(D) F-H.....F>O-H.....O>N-H.....N > CI-H.....CI

Pls tell fast pls pls pls pls

While diluting an acid why it is recommended that acid should be added to water and not water to acid ?

Hello friends ❤❤❤good moorning ✌✌what is plank's quantum theory and what is plank's constant?

Note on dipole dipole forces, dipole induced,induced dipole induced dipole,ion induced dipole

Hey guys what is transition contraction? please answer quickly,, please...

If 0.44 g of a colourless oxide of nitrogen occupies 224 ml at 1520 mm Hg and 273 °C,then the compound is :(a) N₂O (6) NO₂(c) NO4 (d) N2O2 use the formula pv= nrt and solve

If momentum of an object is increased by 10% then its kinetic energy will increase by

What is guttta parcha

What method used to separate carbon from mixture of carbon and magnesium

How many grams does an atoms of hydrogen weight?

A 500mL bulb is filled with CH4 at a pressure of 1 atm and O2 at a pressure of 4 atm at 27°C. The mixture is then exploded when the reaction occursCH4+2O2=CO2+2H2OCalculate the pressure if the final temperature is 27°C and aqueous tension is 28.7 mmHg

Is it true?that one mol of H contain avagadro no.of atoms

What is inert gas radii

The value of K is 9.55 x 10-14 at a certain temperature. Calculate the pH of water at this temperature

Friedel Charles worked on synthesis of(A) benzene.(B) minerals.(C) organic compounds.(D) inorganic compounds.compounds

Is oxygen a metal or nonmetal? Give Reasons..

What is meant by molar volume of gas?

8. What is the unit of rate or velocity of a reaction

Please explain Electrolysis of Acidified water.