52639 + Interview Questions in Secondary School in Chemistry

1.	A covalent molecule having two lone pairs of electron
Answer» TION:NH3 is a MOLECULE with TWO lone PAIRS.

Discussion

2.	Hola.. (╥ω╥`) . . What's the scientific name of gila monster?..thanxx(´；ω；`)
Answer» te✌️Answer:♓️Heloderma suspectum♓️ it is the SPECIES of venomous lizard native to the southwestern UNITED States and NORTHWESTERN Mexican STATE of Sonora.Hope this helps.....

Discussion

3.	I know this is going to be a silly question. but please will you explain me in detail why the structure of SO3 is 2nd instead of 1st??
Answer» because the 2nd ONE is more stablesulphur can MAKE STABLE 3pie BONDS with OXYGEN due to effective overlapping

Discussion

4.	A mixture of gases contains H2and O2,gases in the ratio of 1:4 (w/w). What is the molar ratio ofthe two gases in the mixture? [AIPMT-2015](1) 2:1(2) 1:4(3) 4:1(4) 16:1
Answer» 4:1 Explanation: Number of moles is WEIGHT/mol.mass. Molecular weight of h2 is 2 and that of O2 is 32. So molar RATIO = 1/2 : 4/32 = 4:1

Discussion

5.	a child of 1 year can use dabur Rose water (gulaab jal )with milk on face . I will mark as brainliest
Answer» I DON'T KNOW ABOUT IT .......!!!!!!

Discussion

6.	Find the molar mass of mohr's salt
Answer» Mohr SALT has a FORMULA Fe(SO4)2.(NH4)2.6H2OSo by calculation it's molar mass = 392g/molhope it HELPS you!!!

Discussion

7.	Explain the following13Al is a metal, Si is a metalloid and15P is a nonmetal.
Answer» METAL have ABILITY to LOSE electron.non-metals have to GAIN electron.metalloid have PROPERTY of both

Discussion

8.	When and where does anaerobic respiration occur in man and yeast
Answer» ANAEROBIC RESPIRATION OCCUR in MEN in BONES

Discussion

9.	Define bases (for class 10). .....
Answer» BASE are those SUBSTANCE which produce OH- ion. They have ph greater than 7. Example are soap, NaOH, etc.hope it HELPS you!!!

Discussion

10.	Please name the formula.
Answer» CYANO propan-2-ol

Discussion

11.	CH326. (i) CH3 - CH2 - CH2 - CI -1.0₂2. dil H2SO4D (Arometre)Anhy.Alci:
Answer» EXPLAIN your QUESTION PLEASE

Discussion

12.	30. (1) Give the R\|S nomenclalure..соонніll сонCH;
Answer» ALCOHOL ,ALDEHYDE,KETONE

Discussion

13.	Number of positive ion in 1.45 mole of k 2 s o4
Answer» 1.75 X 10^-24Explanation: 1 MOLE K2SO4 has 6.023 X 10^-23 molecules.So 1.45 moles will have 1.45 X 6.023 X 10^-23 molecules.1 K2SO4 molecule has 2 positive IONS (K+) So 1.45 moles has 2 X 1.45 X 6.023 X 10^-23 positive ions.Solving we GET the given ANSWER :)

Discussion

14.	Postbottom meant please answer
Answer» of POST BOX is CALLED POSTBOTTOM

Discussion

15.	the energy associated with the first Orbit is the hydrogen atom is 2.18*10^-18J/atm. a)what is the energy associated with the 5th orbit . b)calculate the radius of bohr's 5th orbit for hydrogen atom.????
Answer» he energy associated with the first Orbit is the hydrogen ATOM is 2.18*10^-18J/atm. To find:a)what is the energy associated with the 5TH orbit . b)calculate the radius of bohr's 5th orbit for hydrogen atom.Solution:From given, we have,The energy associated with the first Orbit is the hydrogen atom is 2.18 × 10^-18 J/atm. a) The energy associated with the 5th orbit. The formula used to calculate the energy associated with the orbit is,En = -2.17 × 10^{-18}/n²En = -2.17 × 10^{-18}/5²En = -2.17 × 10^{-18}/25En = -8.68 × 10^{-20} JB) The radius of Bohr's 5th orbit for a hydrogen atom.The formula used to calculate the radius of Bohr's 5th orbit for a hydrogen atom is,r_{N} = 0.0529n² nmr_{5} = 0.0529 × 5² nmr_{5} = 0.0529 × 25 nmr_{5} = 1.3225 nmTherefore, a) The energy associated with the 5th orbit is -8.68 × 10^{-20} J. b) The radius of Bohr's 5th orbit for the hydrogen atom is 1.3225 nm.

Discussion

16.	What is sublimation define
Answer» SUBLIMATION (phase transition), DIRECTLY from the solid to the GAS phase

Discussion

17.	The entropy (Sº) of the following substances are : CH, (g) 186.2 J K-' moll02 (g) 205.0 JK- mollCO2 (g) 213.6 J K-mollH,O (1) 69.9 J K mollThe entropy change (ASC) for the reactionCH_(g) + 202(g) → CO2(g) + 2H20 (() is :-TTY-
Answer» this can you EXPLAIN me

Discussion

18.	a compound on analysis gave the following percentage composition by mass H-9.09, o-36.36, c-54.55. mole mass of compound is 88. Find its molecular Formula?
Answer» C8H16O4Explanation: carbon =its percentage 54.55 &its ATOMIC weight 12& relative no of atom= 54.55/12 = 4.53 & it's ratio 4.53/ 2.27=2Hydrogen = its percentage 9.09 and it's Atomic weight 1 &its relative no of atom= 9.09/1=9.09 & its ratio= 9.09/2.27=4oxygen= its percentage 36.36 &its Atomic weight 16 & its relative no of atom= 36.36/16 =2.27 & its ratio = 2.27/2.27=2Empirical formula= C2H4OEmpirical formula weight= 44molecular weight= 2×88=176, n= 176/44=4So, molecular formula= 4 ×empirical formula = 4(C2H4O) = C8H16O4

Discussion

19.	Why is sodiwhy sodium hydrogen carbonate and alkaline salt list its two important uses
Answer» it is a SALT prepared from a strong base and WEAK ACID and thus is an alkaline salt

Discussion

20.	Why is sodium hydrogen carbonate an alkaline salt? List its two important uses.
Answer» HYDROGEN CARBONATE is USED in BAKING POWDER

Discussion

21.	Acid + Metal gives Salt + Hydrogen gas
Answer»

Discussion

22.	A mixture of Mercury and copper is an example of
Answer» It MAY HELP you PLEASE MARK me as BRAINLIEST

Discussion

23.	Difference between a substance, an element and a compound
Answer» Substance : - A substance is a single PURE FORM of matter.It has a specific composition and specific properties.Element : - Element is a substance which is made up of similar kinds of atom. example:-the element hydrogen is made from ATOMS containing a single proton and a single electron.Compound :- A compound is a chemical substance consists of MANY identical molecules composed of atoms from more than one element join by chemical bonds. Elements combine to form chemical compounds

Discussion

24.	100 ml of O2 and H2 keep at same temperature and pressure.what is true about their no. of molecules
Answer» they MERGE TOGETHER and GIVE WATER

Discussion

25.	A sample of gas occupies 10 L . under a pressure of 1 atm. what will be its volume if the pressure is increased to 2 atm ? Assuming that temperature of the gas sample does not change .
Answer» 5 LExplanation:BOYLE's Law: This law states that pressure is inversely proportional to the volume of the GAS at constant temperature and NUMBER of moles. (At constant temperature and number of moles) where, = initial pressure of gas = 1 atm = FINAL pressure of gas = 2 atm = initial volume of gas = 10 L = final volume of gas = ? Therefore, the volume of the gas will be 5 L when pressure is increased to 2 atm .

Discussion

26.	it haa been found that gaseous iodine molecule just dissociate into iodine atom after absorption of light at wawelength 4995A the energy requried to dissociate 1 mole of iodine molecule is
Answer» It has been found that GASEOUS iodine molecule just dissociates into iodine ATOMS after absorption of light at wavelength 4995 A°. The ENERGY required to dissociate 1 MOLE of iodine molecules is. (1) 52.2 kcal / mole.

Discussion

27.	Icse chemistry notes. class10
Answer» TION:in which CHAPTER? but it is AVAILABLE in VEDANTU

Discussion

28.	What are the provision of equality in our constitution?
Answer» The Constitution PROVIDES that all citizens are equal before the law. There can be no discrimination based on a citizen's CASTE, sex, religious belief or place of birth etc.hope this answer will help PLEASE like and MARK as a brainliest and follow me.❣️❣️♥️♥️♥️♥️♥️♥️

Discussion

29.	Classify the following as extensive physical property or intensive physical property: a)zinc is slightly less dense than copper b)freezing point of hexane is -95.3 degree celcius c)the length of a medium size teacher's desk is 48 inches d)the height of mount Everest is 8.848m
Answer» ........ SRRY MATE DONT KNOW

Discussion

30.	inundment facility, typically a large hydropower system, uses a dam to store river water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricit
Answer» tion:The most common type of HYDROELECTRIC power plant is an impoundment FACILITY. An impoundment facility, typically a large hydropower system, uses a dam to store river water in a RESERVOIR. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a GENERATOR to produce electricity

Discussion

31.	IDENTIIFY 2 CLEAR AND TRANSPARENT SOLUTIONS FROM THE FOLLOWING A)MILK AND WATER B)SUGAR AND STARCH C)GLUCOSE AND WATER D)STARCH POWDER AND WATER
Answer» 1. milk and WATER 2. sugar and starch

Discussion

32.	What is meant by molar volume of a gas
Answer» TION:I HOPE this ANSWER is HELPFUL for you

Discussion

33.	How is colligative property change when solute undergoes association in solution?
Answer» As A ExaMPle..This increases the MOLAR mass of the solution than expected value, when determined experimentally, using colligative properties methods. When acetic ACID (ETHANOIC acid) is dissolved into benzene, molecules of acetic acid GETS associated i.e. dimerize DUE to hydrogen bondings and number of particles reduced...

Discussion

34.	Definite proporto Integration If the fine) - 90)thes of (How + c) = g(n)this meansIgfulfautis a content knownconstant of enterDefinite integration :withlunit, iffrinathey are the integrationsfunction (finlxdu= Frejthenb(fim xdna (f(n))f(b) - Flag
Answer» definite proporto IntegrationIf the FINE) - 90)thes of (How + C) = g(N)this meansIgfulfautis a content knownconstant of enterDefinite INTEGRATION :withlunit, iffrinathey are the integrationsfunction (finlxdu= Frejthenb(fim xdna (f(n))f(b) - FLAG

Discussion

35.	What is metal excess defect.?
Answer» what is metal excess defect.?By anion vacancies: In this defect, a negative ion is missing from its lattice site, leaving behind a hole which is occupied by an ELECTRON and maintain the electrical balance. Metal excess defect may also cause by extra cations which OCCUPY the interstitial sites.Nonstoichiometric INORGANIC SOLIDS contain the constituent elements in a non-stoichiometric ratio due to defects in their crystal structures. These defects are of two types: (i) metal excess defect (ii) metal deficiency defect.$$$$$$$$$$$$$$$_________¥£€❤

Discussion

36.	Upto which shells(s,p,d,f) the questions are asked in JEE based on overlapping and hybridization?
Answer» d SHELL ACCORDING to me ASK in JEE

Discussion

37.	Refer the pic and answer the match the following
Answer» TION:ARGON = 22 neutronscarbon = 8 neutrons potassium = 21 netrons NITROGEN = 7 neutronsatomic number of an element is the number of protons or electrons in that element else are neutrons .exmple: argon , atomic no. = 18 MASS no. = 40 number of neutrons =40 - 18 = 22 ans.

Discussion

38.	a sample of a pure element that has a mass of 1.00 g contains 4.39×10^21 atom. what is the element. ..
Answer» is HELPS U co-relate with the GIVEN ANS

Discussion

39.	A marble chip has a mass of 2.0 grams before being immersed in vinegar overnight. The chip is removed and dried the next day.What will the mass of the dried marble chip be?
Answer» I am GOING out the WINDOW in which you are

Discussion

40.	find oxidation state of Cl in CaOCl2 with solution whoever will answer I'll mark as brainliast answer
Answer» OXIDATION is +1 because it's CHARGE is +1

Discussion

41.	Heyyy guys which metals are called coinage metals answer plz
Answer» TION:blessed 2HELP uplz mark me as BRainliest...THNKS

Discussion

42.	can the valency of an elements. if it can mention two such elements and show how they from compounds. how are these compounds name.
Answer» the valency of elements means the number of electrons PRESENT in outermost shell of the ATOM. the number of the electrons creates the bond between the two unstable elements by sharing of electrons are CALLED as bondsthe bonds like covalent bondthese formation two different elements called together as compound ex=1)h2o (water) here, two molecules of hydrogen are bonded with ONE molecule of oxygen hence the h2o(water) is compound. ADD to brainlist

Discussion

43.	The no. of sodium atoms in 2 moles of sodium ferrocyanide is
Answer» EXPLANATION:SODIUM ferrocyanide = Na₄Fe(CN)₆.No: of atoms = No : of moles × Avogadro no: Total No : of sodium atoms = 4∴No: of atoms of sodium = 4 × 2 × 6.022 × 10²³ = 8 × 6.022 × 10²³ = 48. 176 × 6.022 × 10²³ atoms

Discussion

44.	What is the meaning of bombared
Answer» FOLLOW the MEDIUM WEBSTER appYou will GET all the DETAILS in it

Discussion

45.	Chemical formula for 10th
Answer» TION:CHEMICAL FORMULA for COMMAN Salt=Nacl

Discussion

46.	The wavelength of the spectral line, for the transition n=2 to n=l in the hydrogen emission spectrum. Which of the following spectral line also has a wavelength of X 1)H alfa' line in the Balmer series of spectrum of H2) "H beta 'line in the Balmer series of spectrum of "H3) 'H'alfa line in the Balmer series of spectrum of 'He+14) 'H betaline in the Balmer series of spectrum of 'He+1
Answer» Option B is ur RIGHT answer MATE

Discussion

47.	2. Describe, giving three examples, how atoms form molecules.
Answer» TWO ATOM COMBINE to FORM MOLECULES

Discussion

48.	Type of overlapping obseved in HCN molecule
Answer» a TYPE of OVERLAPPING obseved in HCN MOLECULE

Discussion

49.	Curd ? Explain your answer. A milkman adds a very small amount of bakingsoda to fresh milk. Why does this milk take longertime to set as curd ?[NCERT] [KVS 2017]
Answer» Hey mate here are your answers... (A) A milkman adds a very SMALL amount of baking soda to PROVIDE a basic nature to milk so that the base neutralise the lactic acid (which CONVERTS milk to curd) and prevent curd formation... (B) Milk takes a longer TIME to SET as curd because due to baking soda, the acid has been neutralized and takes longer time... Please Mark As Brainliest...

Discussion

50.	What weight of ammonia contains the same number of molecules as 11.2litre of oxygen at stp
Answer» molecules in 11.2 ltrs of Oxygen= 1/2 N where N is AVOGADRO no.Molecular WEIGHT of Ammonia (NH3) = 17N molecules NH3 will contain 17 gms1/2 N will contain 1/2*17 = 8.5 GMS of Ammonia. HOPE it helps.Please mark this as brainliest.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A covalent molecule having two lone pairs of electron​

Hola.. (╥ω╥`) . . What's the scientific name of gila monster?..thanxx(´；ω；`)​

I know this is going to be a silly question. but please will you explain me in detail why the structure of SO3 is 2nd instead of 1st??​

A mixture of gases contains H2and O2,gases in the ratio of 1:4 (w/w). What is the molar ratio ofthe two gases in the mixture? [AIPMT-2015](1) 2:1(2) 1:4(3) 4:1(4) 16:1​

a child of 1 year can use dabur Rose water (gulaab jal )with milk on face . I will mark as brainliest​

Find the molar mass of mohr's salt​

Explain the following13Al is a metal, Si is a metalloid and15P is a nonmetal.​

When and where does anaerobic respiration occur in man and yeast​

Define bases (for class 10). .....​

Please name the formula. ​

CH326. (i) CH3 - CH2 - CH2 - CI -1.0₂2. dil H2SO4D (Arometre)Anhy.Alci:​

30. (1) Give the R|S nomenclalure..соонніll сонCH;​

Number of positive ion in 1.45 mole of k 2 s o4​

Postbottom meant please answer ​

the energy associated with the first Orbit is the hydrogen atom is 2.18*10^-18J/atm. a)what is the energy associated with the 5th orbit . b)calculate the radius of bohr's 5th orbit for hydrogen atom.????​

What is sublimation define​

The entropy (Sº) of the following substances are : CH, (g) 186.2 J K-' moll02 (g) 205.0 JK- mollCO2 (g) 213.6 J K-mollH,O (1) 69.9 J K mollThe entropy change (ASC) for the reactionCH_(g) + 202(g) → CO2(g) + 2H20 (() is :-TTY-​

a compound on analysis gave the following percentage composition by mass H-9.09, o-36.36, c-54.55. mole mass of compound is 88. Find its molecular Formula?​

Why is sodiwhy sodium hydrogen carbonate and alkaline salt list its two important uses ​

Why is sodium hydrogen carbonate an alkaline salt? List its two important uses. ​

Acid + Metal gives Salt + Hydrogen gas​

A mixture of Mercury and copper is an example of​

Difference between a substance, an element and a compound

100 ml of O2 and H2 keep at same temperature and pressure.what is true about their no. of molecules ​

A sample of gas occupies 10 L . under a pressure of 1 atm. what will be its volume if the pressure is increased to 2 atm ? Assuming that temperature of the gas sample does not change .​

it haa been found that gaseous iodine molecule just dissociate into iodine atom after absorption of light at wawelength 4995A the energy requried to dissociate 1 mole of iodine molecule is​

Icse chemistry notes. class10​

What are the provision of equality in our constitution?​

Classify the following as extensive physical property or intensive physical property: a)zinc is slightly less dense than copper b)freezing point of hexane is -95.3 degree celcius c)the length of a medium size teacher's desk is 48 inches d)the height of mount Everest is 8.848m

inundment facility, typically a large hydropower system, uses a dam to store river water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricit​

IDENTIIFY 2 CLEAR AND TRANSPARENT SOLUTIONS FROM THE FOLLOWING A)MILK AND WATER B)SUGAR AND STARCH C)GLUCOSE AND WATER D)STARCH POWDER AND WATER​

What is meant by molar volume of a gas​

How is colligative property change when solute undergoes association in solution?

Definite proporto Integration If the fine) - 90)thes of (How + c) = g(n)this meansIgfulfautis a content knownconstant of enterDefinite integration :withlunit, iffrinathey are the integrationsfunction (finlxdu= Frejthenb(fim xdna (f(n))f(b) - Flag​

What is metal excess defect.?​

Upto which shells(s,p,d,f) the questions are asked in JEE based on overlapping and hybridization?​

Refer the pic and answer the match the following ​

a sample of a pure element that has a mass of 1.00 g contains 4.39×10^21 atom. what is the element. ..​

A marble chip has a mass of 2.0 grams before being immersed in vinegar overnight. The chip is removed and dried the next day.What will the mass of the dried marble chip be?​

find oxidation state of Cl in CaOCl2 with solution whoever will answer I'll mark as brainliast answer ​

Heyyy guys which metals are called coinage metals answer plz​

can the valency of an elements. if it can mention two such elements and show how they from compounds. how are these compounds name.​

The no. of sodium atoms in 2 moles of sodium ferrocyanide is​

What is the meaning of bombared​

Chemical formula for 10th​

2. Describe, giving three examples, how atoms form molecules.​

Type of overlapping obseved in HCN molecule

Curd ? Explain your answer. A milkman adds a very small amount of bakingsoda to fresh milk. Why does this milk take longertime to set as curd ?[NCERT] [KVS 2017]​

What weight of ammonia contains the same number of molecules as 11.2litre of oxygen at stp

A covalent molecule having two lone pairs of electron

Hola.. (╥ω╥`) . . What's the scientific name of gila monster?..thanxx(´；ω；`)

I know this is going to be a silly question. but please will you explain me in detail why the structure of SO3 is 2nd instead of 1st??

A mixture of gases contains H2and O2,gases in the ratio of 1:4 (w/w). What is the molar ratio ofthe two gases in the mixture? [AIPMT-2015](1) 2:1(2) 1:4(3) 4:1(4) 16:1

a child of 1 year can use dabur Rose water (gulaab jal )with milk on face . I will mark as brainliest

Find the molar mass of mohr's salt

Explain the following13Al is a metal, Si is a metalloid and15P is a nonmetal.

When and where does anaerobic respiration occur in man and yeast

Define bases (for class 10). .....

Please name the formula.

CH326. (i) CH3 - CH2 - CH2 - CI -1.0₂2. dil H2SO4D (Arometre)Anhy.Alci:

30. (1) Give the R|S nomenclalure..соонніll сонCH;

Number of positive ion in 1.45 mole of k 2 s o4

Postbottom meant please answer

the energy associated with the first Orbit is the hydrogen atom is 2.18*10^-18J/atm. a)what is the energy associated with the 5th orbit . b)calculate the radius of bohr's 5th orbit for hydrogen atom.????

What is sublimation define

The entropy (Sº) of the following substances are : CH, (g) 186.2 J K-' moll02 (g) 205.0 JK- mollCO2 (g) 213.6 J K-mollH,O (1) 69.9 J K mollThe entropy change (ASC) for the reactionCH_(g) + 202(g) → CO2(g) + 2H20 (() is :-TTY-

a compound on analysis gave the following percentage composition by mass H-9.09, o-36.36, c-54.55. mole mass of compound is 88. Find its molecular Formula?

Why is sodiwhy sodium hydrogen carbonate and alkaline salt list its two important uses

Why is sodium hydrogen carbonate an alkaline salt? List its two important uses.

Acid + Metal gives Salt + Hydrogen gas

A mixture of Mercury and copper is an example of

100 ml of O2 and H2 keep at same temperature and pressure.what is true about their no. of molecules

A sample of gas occupies 10 L . under a pressure of 1 atm. what will be its volume if the pressure is increased to 2 atm ? Assuming that temperature of the gas sample does not change .

it haa been found that gaseous iodine molecule just dissociate into iodine atom after absorption of light at wawelength 4995A the energy requried to dissociate 1 mole of iodine molecule is

Icse chemistry notes. class10

What are the provision of equality in our constitution?

inundment facility, typically a large hydropower system, uses a dam to store river water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricit

IDENTIIFY 2 CLEAR AND TRANSPARENT SOLUTIONS FROM THE FOLLOWING A)MILK AND WATER B)SUGAR AND STARCH C)GLUCOSE AND WATER D)STARCH POWDER AND WATER

What is meant by molar volume of a gas

Definite proporto Integration If the fine) - 90)thes of (How + c) = g(n)this meansIgfulfautis a content knownconstant of enterDefinite integration :withlunit, iffrinathey are the integrationsfunction (finlxdu= Frejthenb(fim xdna (f(n))f(b) - Flag

What is metal excess defect.?

Upto which shells(s,p,d,f) the questions are asked in JEE based on overlapping and hybridization?

Refer the pic and answer the match the following

a sample of a pure element that has a mass of 1.00 g contains 4.39×10^21 atom. what is the element. ..

A marble chip has a mass of 2.0 grams before being immersed in vinegar overnight. The chip is removed and dried the next day.What will the mass of the dried marble chip be?

find oxidation state of Cl in CaOCl2 with solution whoever will answer I'll mark as brainliast answer

Heyyy guys which metals are called coinage metals answer plz

can the valency of an elements. if it can mention two such elements and show how they from compounds. how are these compounds name.

The no. of sodium atoms in 2 moles of sodium ferrocyanide is

What is the meaning of bombared

Chemical formula for 10th

2. Describe, giving three examples, how atoms form molecules.

Curd ? Explain your answer. A milkman adds a very small amount of bakingsoda to fresh milk. Why does this milk take longertime to set as curd ?[NCERT] [KVS 2017]