46295 + Interview Questions in Chemistry

1.	The volume of oxygen at STP required for the complete combustion of 4g CH4 is
Answer» The volume of oxygen at STP required for the complete combustion of 4g CH4 is

Discussion

2.	How to make cyclopentane from aldehyde using grignard reagent not by doing chlorination
Answer» How to make cyclopentane from aldehyde using grignard reagent not by doing chlorination

Discussion

3.	how are Nitrogen and oxygen idodiaphers
Answer» how are Nitrogen and oxygen idodiaphers

Discussion

4.	What is 'A' in the following reaction?
Answer» What is 'A' in the following reaction?

Discussion

5.	What are alkali and non - alkali , metals and non - metals?
Answer» What are alkali and non - alkali , metals and non - metals?

Discussion

6.	23. Maximum number of isomers including stereo isomers that are possible on mono chlorination of the compound 3-methylpentane
Answer» 23. Maximum number of isomers including stereo isomers that are possible on mono chlorination of the compound 3-methylpentane

Discussion

7.	Considerthe compounds, BCl3andCCl4.How will they behave with water? Justify.
Answer» Consider the compounds, BCl₃and CCl₄. How will they behave with water? Justify.

Discussion

8.	4 charges are placed ate ends of the square of length a. Find the magnitude of the charge that should be placed at the centre of the the square so that all the changes at the end of square are in equilibrium.
Answer» 4 charges are placed ate ends of the square of length a. Find the magnitude of the charge that should be placed at the centre of the the square so that all the changes at the end of square are in equilibrium.

Discussion

9.	100 mL of N2(g) reacts with 300 mL of H2(g) to give how many mL of NH3(g) under identical conditions?
Answer» 100 mL of N2(g) reacts with 300 mL of H2(g) to give how many mL of NH3(g) under identical conditions?

Discussion

10.	3.12 g of oxygen is adsorbed on 1.2 g of platinum metal. The volume of oxygen adsorbed per gram of the adsorbent at 1 atm and 300 K in L is _____.[R=0.0821 L atm K−1mol−1]
Answer» $3.12 g$ of oxygen is adsorbed on $1.2 g$ of platinum metal. The volume of oxygen adsorbed per gram of the adsorbent at $1 a t m$ and $300 K$ in $L$ is _____. [ $R = 0.0821 L a t m K^{- 1} m o l^{- 1}$ ]

Discussion

11.	The standard enthalpy of formation of octane (C8H18) is −250 kJ/mol. Calculate the enthalpy of combustion of C8H18. Given that enthalpy of formation of CO2(g) and H2O(l) are −394 kJ/mol and −286 kJ/mol respectively.
Answer» The standard enthalpy of formation of octane $(C_{8} H_{18})$ is $- 250 kJ/mol$ . Calculate the enthalpy of combustion of $C_{8} H_{18}$ . Given that enthalpy of formation of $C O_{2} (g)$ and $H_{2} O (l)$ are $- 394 kJ/mol$ and $- 286 kJ/mol$ respectively.

Discussion

12.	Assuming that hand's rule is violated the bond order and magnet nature of diatomic molecule B2 i
Answer» Assuming that hand's rule is violated the bond order and magnet nature of diatomic molecule B2 i

Discussion

13.	If a+2b,=3 and ab=-5 then the value of a^2+4b^2 is ______.
Answer» If a+2b,=3 and ab=-5 then the value of a^2+4b^2 is ______.

Discussion

14.	26. 27 g of Al will react completely with oxygen equals to a)24 g b)8g C)40g d)10g
Answer» 26. 27 g of Al will react completely with oxygen equals to a)24 g b)8g C)40g d)10g

Discussion

15.	Percentage by volume of C3H8 in a gaseous mixture of C3H8,CH4,CO is 20.When 100 ml of mixture is burnt in excess of oxygen .The volume of CO2 produced at STP will be 1.90 ml 2.160 ml 3.140 ml 4.200 ml
Answer» Percentage by volume of C3H8 in a gaseous mixture of C3H8,CH4,CO is 20.When 100 ml of mixture is burnt in excess of oxygen .The volume of CO2 produced at STP will be 1.90 ml 2.160 ml 3.140 ml 4.200 ml

Discussion

16.	Dieldrin, an insecticide, contains C, H, Cl and O. Combustion of 29.72 mg of Dieldrin gave 41.21 mg CO2 and 5.63 mg of H2O. In a separate analysis 25.31 mg of Dieldrin was converted into 57.13 mg AgCl.What is the empirical formula of Dieldrin?
Answer» Dieldrin, an insecticide, contains C, H, Cl and O. Combustion of 29.72 mg of Dieldrin gave 41.21 mg CO2 and 5.63 mg of H2O. In a separate analysis 25.31 mg of Dieldrin was converted into 57.13 mg AgCl. What is the empirical formula of Dieldrin?

Discussion

17.	Bond dissociation energy of XY, X2 and Y2 (all diatomic molecules) are in the ratio of 1 :1:0.5 and Hf of XY is-200 kJ mol-1. The bonddissociation energy of X2 will be
Answer» Bond dissociation energy of XY, X2 and Y2 (all diatomic molecules) are in the ratio of 1 :1:0.5 and Hf of XY is-200 kJ mol-1. The bonddissociation energy of X2 will be

Discussion

18.	Estimatethe mean free path and collision frequency of a nitrogen molecule ina cylinder containing nitrogen at 2.0 atm and temperature 17 °C.Take the radius of a nitrogen molecule to be roughly 1.0 Å.Compare the collision time with the time the molecule moves freelybetween two successive collisions (Molecular mass of N2= 28.0 u).
Answer» Estimate the mean free path and collision frequency of a nitrogen molecule in a cylinder containing nitrogen at 2.0 atm and temperature 17 °C. Take the radius of a nitrogen molecule to be roughly 1.0 Å. Compare the collision time with the time the molecule moves freely between two successive collisions (Molecular mass of N₂ = 28.0 u).

Discussion

19.	27 Hydrocarbon C5H8 on reductive oxonolysis to give formaldehyde and 2 ketone propanal. Assign the structure of hydrocarbon
Answer» 27 Hydrocarbon C5H8 on reductive oxonolysis to give formaldehyde and 2 ketone propanal. Assign the structure of hydrocarbon

Discussion

20.	Electrolysis involves oxidation and reduction respectively at[CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]
Answer» Electrolysis involves oxidation and reduction respectively at [CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]

20.

Electrolysis involves oxidation and reduction respectively at[CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]

Answer»

Electrolysis involves oxidation and reduction respectively at

[CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]

Discussion

21.	66 why dry ammonia gas does not change red litmus paper blue ?
Answer» 66 why dry ammonia gas does not change red litmus paper blue ?

Discussion

22.	pA and pB are the vapour pressures of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure (P) of the solution will be:
Answer» $p_{A}$ and $p_{B}$ are the vapour pressures of pure liquid components, $A$ and $B$ , respectively of an ideal binary solution. If $x_{A}$ represents the mole fraction of component $A$ , the total pressure $(P)$ of the solution will be:

Discussion

23.	58. Why in physical adsorption of gas on solid Δ H=-ive
Answer» 58. Why in physical adsorption of gas on solid Δ H=-ive

Discussion

24.	A gas at certain volume and temperature has a pressure equal to 75 cm of Hg. column. If the mass of the gas is doubled, at the same volume and temperature, its new pressure will become (in cm of Hg)-
Answer» A gas at certain volume and temperature has a pressure equal to $75 cm$ of Hg. column. If the mass of the gas is doubled, at the same volume and temperature, its new pressure will become (in $cm$ of Hg)-

Discussion

25.	100 ml of 0.2 M NaCl is mixed with 50 ml of 0.5 M AgNO3 solution. Mole of silver chloride formed in the reaction is?
Answer» 100 ml of 0.2 M NaCl is mixed with 50 ml of 0.5 M AgNO3 solution. Mole of silver chloride formed in the reaction is?

Discussion

26.	10. InFe4(Fe(CN)6)3 ,The oxidation number of Fe present in coordination sphere is
Answer» 10. InFe4(Fe(CN)6)3 ,The oxidation number of Fe present in coordination sphere is

Discussion

27.	12. which of the following is isostructural? XeF2,IF2- NH3,BF3 CO32- , SO32- PCl5,ICl5? and, how?
Answer» 12. which of the following is isostructural? XeF2,IF2- NH3,BF3 CO32- , SO32- PCl5,ICl5? and, how?

Discussion

28.	Correct order of free radical allylic substitution of following is :- (1)CH3–CH=CH2 (II)(CH3)2CH-CH=CH2(3)Ph–CH2–CH=CH2 (1)I > II > III(2)III > I > II (3)III > II > I(4)I > III > II
Answer» Correct order of free radical allylic substitution of following is :- (1)CH3–CH=CH2 (II)(CH3)2CH-CH=CH2 (3)Ph–CH2–CH=CH2 (1) I > II > III (2) III > I > II (3) III > II > I (4) I > III > II

Discussion

29.	The ratio of moles of hydrogen and phosphorus in196 g of phosphoric acid is(1)3 : 1(2)2 : 3(3)1 : 1(4)3 : 2
Answer» The ratio of moles of hydrogen and phosphorus in196 g of phosphoric acid is (1)3 : 1(2)2 : 3(3)1 : 1(4)3 : 2

Discussion

30.	Calculate the weight of CO having the same number of oxygen atoms as are present in 22g of Carbon dioxide
Answer» Calculate the weight of CO having the same number of oxygen atoms as are present in 22g of Carbon dioxide

Discussion

31.	8 Which one of the following compounds can produce hydrogen when treated with metallic sodium (a)CH3NH2 (b)C6H5NH2 (c)(CH3)2NH (d)CH3CONH2
Answer» 8 Which one of the following compounds can produce hydrogen when treated with metallic sodium (a)CH3NH2 (b)C6H5NH2 (c)(CH3)2NH (d)CH3CONH2

Discussion

32.	The number of atoms present in 16 grams of helium is:
Answer» The number of atoms present in 16 grams of helium is:

Discussion

33.	A current of 2 amperes passing through for 5 hours through molten tin salt deposited 22.2 gm of tin. The oxidation state of tin in the salt is ( at. Mass of Sn = 119 )
Answer» A current of 2 amperes passing through for 5 hours through molten tin salt deposited 22.2 gm of tin. The oxidation state of tin in the salt is ( at. Mass of Sn = 119 )

Discussion

34.	the density of Nickel ( face centred cubic cell ) is 8.94 gram per centimetre cube at 20 degree Celsius what is the diameter of the atom
Answer» the density of Nickel ( face centred cubic cell ) is 8.94 gram per centimetre cube at 20 degree Celsius what is the diameter of the atom

Discussion

35.	Which of the following type of plot would you expect from the titration of AgNO3 againest KCl solution ?
Answer» Which of the following type of plot would you expect from the titration of $A g N O_{3}$ againest $K C l$ solution ?

Discussion

36.	What is the minimum no. Of carbon chain required to show both chain and position isomerism together in alkenes
Answer» What is the minimum no. Of carbon chain required to show both chain and position isomerism together in alkenes

Discussion

37.	A neon-dioxygen mixture contains 70.6 g dioxygen and 167.5 g neon. If the pressure of the mixture of gases in the cylinder is 25 bar, what is the partial pressure of dioxygen and neon in the mixture?
Answer» A neon-dioxygen mixture contains $70.6 g$ dioxygen and $167.5 g$ neon. If the pressure of the mixture of gases in the cylinder is 25 bar, what is the partial pressure of dioxygen and neon in the mixture?

Discussion

38.	How many chiral compounds are possible on monochlorination of 2-methylbutane?
Answer» How many chiral compounds are possible on monochlorination of 2-methylbutane?

Discussion

39.	One mole of an ideal gas at 22.4 L is expanded isothermally and reversibly at 300 K to a volume of 224 L at a constant pressure. Calculate the ΔG in kJ. (Given, R=8.314 J K−1 mol−1).
Answer» One mole of an ideal gas at $22.4 L$ is expanded isothermally and reversibly at $300 K$ to a volume of $224 L$ at a constant pressure. Calculate the $Δ G$ in $kJ$ . (Given, $R = 8.314 {J K}^{- 1} {mol}^{- 1}$ ).

Discussion

40.	0.2g of a gas 'X' occupies a volume of 440 ml . If 0.1g of carbon dioxide occupies a volume of 320 ml at the same temperature & pressure . Gas 'X' would be (1) O_2 (2) SO_2 (3) NO (4) C_4H_{10
Answer» 0.2g of a gas 'X' occupies a volume of 440 ml . If 0.1g of carbon dioxide occupies a volume of 320 ml at the same temperature & pressure . Gas 'X' would be (1) O_2 (2) SO_2 (3) NO (4) C_4H_{10

Discussion

41.	Which of the following halides will be most reactive in SN2 reaction and SN1 reaction, respectively?
Answer» Which of the following halides will be most reactive in $S N^{2}$ reaction and $S N^{1}$ reaction, respectively?

Discussion

42.	44 0.32g of a compound gave0.233g of BaSO4 .determine the percentage of sulphur in compound.
Answer» 44 0.32g of a compound gave0.233g of BaSO4 .determine the percentage of sulphur in compound.

Discussion

43.	2.16 g of a metal oxide on strong heating produced 255 mL of oxygen at STP (taking 1 amu as standard pressure) and the residue obtained was a pure metal. Calculate the equivalent weight of the metal.
Answer» $2.16 g$ of a metal oxide on strong heating produced $255 mL$ of oxygen at STP (taking 1 amu as standard pressure) and the residue obtained was a pure metal. Calculate the equivalent weight of the metal.

Discussion

44.	The partial pressure of ethane over a solution containing 6.56 x 10 g ofethane is 1 bar. If the solutioncontains 5.00 x 10-2 g of ethane, then whatshall be the partial pressure of the gas?
Answer» The partial pressure of ethane over a solution containing 6.56 x 10 g ofethane is 1 bar. If the solutioncontains 5.00 x 10-2 g of ethane, then whatshall be the partial pressure of the gas?

Discussion

45.	33. In an experiment the equilibriurm constant for the reaction A +B=C+ D is K, when the initial moles of A and B each is 1.0 moles. Under the similar conditions in an another experiment if the initial moles of A and B are taken 2 and 3 moles then the value of equilibrium constant will be:-
Answer» 33. In an experiment the equilibriurm constant for the reaction A +B=C+ D is K, when the initial moles of A and B each is 1.0 moles. Under the similar conditions in an another experiment if the initial moles of A and B are taken 2 and 3 moles then the value of equilibrium constant will be:-

Discussion

46.	Lithium has a bcc structure. Its density is 530 kg m−3 and its atomic mass is 6.94 g mol−1. Calculate the edge length of a unit cell of lithium metal. (NA=6.02×1023 mol−1)
Answer» Lithium has a $b c c$ structure. Its density is $530 {kg m}^{- 3}$ and its atomic mass is $6.94 {g mol}^{- 1}$ . Calculate the edge length of a unit cell of lithium metal. $(N_{A} = 6.02 \times 10^{23} {mol}^{- 1})$

Discussion

47.	The activation energy for a simple chemical reaction, A→B is Ea in forward direction. The activation energy for reverse reaction. [CBSE AIPMT 2003]
Answer» The activation energy for a simple chemical reaction, $A \to B$ is $E_{a}$ in forward direction. The activation energy for reverse reaction. [CBSE AIPMT 2003]

Discussion

48.	Modern detergents contain enzyme preparations of
Answer» Modern detergents contain enzyme preparations of

Discussion

49.	13. What is the maximum number of electrons in an atom in which the last electron , filled , has the following quantum number? A. n=3, l= 1 , m=-1 B.n=3,l=2,m=-1,s=-1/2
Answer» 13. What is the maximum number of electrons in an atom in which the last electron , filled , has the following quantum number? A. n=3, l= 1 , m=-1 B.n=3,l=2,m=-1,s=-1/2

Discussion

50.	Q:- 0.5L gaseous hydrocarbon on complete combustion gives 1500ml of CO2(g) and 2000ml of H2O(g) under similar condition of 'temperature and pressure'. Dertermine formula of gaseous hydrocarbon?
Answer» Q:- 0.5L gaseous hydrocarbon on complete combustion gives 1500ml of CO2(g) and 2000ml of H2O(g) under similar condition of 'temperature and pressure'. Dertermine formula of gaseous hydrocarbon?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The volume of oxygen at STP required for the complete combustion of 4g CH4 is

How to make cyclopentane from aldehyde using grignard reagent not by doing chlorination

how are Nitrogen and oxygen idodiaphers

What is 'A' in the following reaction?

What are alkali and non - alkali , metals and non - metals?

23. Maximum number of isomers including stereo isomers that are possible on mono chlorination of the compound 3-methylpentane

Considerthe compounds, BCl3andCCl4.How will they behave with water? Justify.

4 charges are placed ate ends of the square of length a. Find the magnitude of the charge that should be placed at the centre of the the square so that all the changes at the end of square are in equilibrium.

100 mL of N2(g) reacts with 300 mL of H2(g) to give how many mL of NH3(g) under identical conditions?

3.12 g of oxygen is adsorbed on 1.2 g of platinum metal. The volume of oxygen adsorbed per gram of the adsorbent at 1 atm and 300 K in L is _____.[R=0.0821 L atm K−1mol−1]

The standard enthalpy of formation of octane (C8H18) is −250 kJ/mol. Calculate the enthalpy of combustion of C8H18. Given that enthalpy of formation of CO2(g) and H2O(l) are −394 kJ/mol and −286 kJ/mol respectively.

Assuming that hand's rule is violated the bond order and magnet nature of diatomic molecule B2 i

If a+2b,=3 and ab=-5 then the value of a^2+4b^2 is ______.

26. 27 g of Al will react completely with oxygen equals to a)24 g b)8g C)40g d)10g

Percentage by volume of C3H8 in a gaseous mixture of C3H8,CH4,CO is 20.When 100 ml of mixture is burnt in excess of oxygen .The volume of CO2 produced at STP will be 1.90 ml 2.160 ml 3.140 ml 4.200 ml

Dieldrin, an insecticide, contains C, H, Cl and O. Combustion of 29.72 mg of Dieldrin gave 41.21 mg CO2 and 5.63 mg of H2O. In a separate analysis 25.31 mg of Dieldrin was converted into 57.13 mg AgCl.What is the empirical formula of Dieldrin?

Bond dissociation energy of XY, X2 and Y2 (all diatomic molecules) are in the ratio of 1 :1:0.5 and Hf of XY is-200 kJ mol-1. The bonddissociation energy of X2 will be

27 Hydrocarbon C5H8 on reductive oxonolysis to give formaldehyde and 2 ketone propanal. Assign the structure of hydrocarbon

Electrolysis involves oxidation and reduction respectively at[CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]

66 why dry ammonia gas does not change red litmus paper blue ?

pA and pB are the vapour pressures of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure (P) of the solution will be:

58. Why in physical adsorption of gas on solid Δ H=-ive

A gas at certain volume and temperature has a pressure equal to 75 cm of Hg. column. If the mass of the gas is doubled, at the same volume and temperature, its new pressure will become (in cm of Hg)-

100 ml of 0.2 M NaCl is mixed with 50 ml of 0.5 M AgNO3 solution. Mole of silver chloride formed in the reaction is?

10. InFe4(Fe(CN)6)3 ,The oxidation number of Fe present in coordination sphere is

12. which of the following is isostructural? XeF2,IF2- NH3,BF3 CO32- , SO32- PCl5,ICl5? and, how?

Correct order of free radical allylic substitution of following is :- (1)CH3–CH=CH2 (II)(CH3)2CH-CH=CH2(3)Ph–CH2–CH=CH2 (1)I > II > III(2)III > I > II (3)III > II > I(4)I > III > II

The ratio of moles of hydrogen and phosphorus in196 g of phosphoric acid is(1)3 : 1(2)2 : 3(3)1 : 1(4)3 : 2

Calculate the weight of CO having the same number of oxygen atoms as are present in 22g of Carbon dioxide

8 Which one of the following compounds can produce hydrogen when treated with metallic sodium (a)CH3NH2 (b)C6H5NH2 (c)(CH3)2NH (d)CH3CONH2

The number of atoms present in 16 grams of helium is:

A current of 2 amperes passing through for 5 hours through molten tin salt deposited 22.2 gm of tin. The oxidation state of tin in the salt is ( at. Mass of Sn = 119 )

the density of Nickel ( face centred cubic cell ) is 8.94 gram per centimetre cube at 20 degree Celsius what is the diameter of the atom

Which of the following type of plot would you expect from the titration of AgNO3 againest KCl solution ?

What is the minimum no. Of carbon chain required to show both chain and position isomerism together in alkenes

A neon-dioxygen mixture contains 70.6 g dioxygen and 167.5 g neon. If the pressure of the mixture of gases in the cylinder is 25 bar, what is the partial pressure of dioxygen and neon in the mixture?

How many chiral compounds are possible on monochlorination of 2-methylbutane?

One mole of an ideal gas at 22.4 L is expanded isothermally and reversibly at 300 K to a volume of 224 L at a constant pressure. Calculate the ΔG in kJ. (Given, R=8.314 J K−1 mol−1).

0.2g of a gas 'X' occupies a volume of 440 ml . If 0.1g of carbon dioxide occupies a volume of 320 ml at the same temperature & pressure . Gas 'X' would be (1) O_2 (2) SO_2 (3) NO (4) C_4H_{10

Which of the following halides will be most reactive in SN2 reaction and SN1 reaction, respectively?

44 0.32g of a compound gave0.233g of BaSO4 .determine the percentage of sulphur in compound.

2.16 g of a metal oxide on strong heating produced 255 mL of oxygen at STP (taking 1 amu as standard pressure) and the residue obtained was a pure metal. Calculate the equivalent weight of the metal.

The partial pressure of ethane over a solution containing 6.56 x 10 g ofethane is 1 bar. If the solutioncontains 5.00 x 10-2 g of ethane, then whatshall be the partial pressure of the gas?

33. In an experiment the equilibriurm constant for the reaction A +B=C+ D is K, when the initial moles of A and B each is 1.0 moles. Under the similar conditions in an another experiment if the initial moles of A and B are taken 2 and 3 moles then the value of equilibrium constant will be:-

Lithium has a bcc structure. Its density is 530 kg m−3 and its atomic mass is 6.94 g mol−1. Calculate the edge length of a unit cell of lithium metal. (NA=6.02×1023 mol−1)

The activation energy for a simple chemical reaction, A→B is Ea in forward direction. The activation energy for reverse reaction. [CBSE AIPMT 2003]

Modern detergents contain enzyme preparations of

13. What is the maximum number of electrons in an atom in which the last electron , filled , has the following quantum number? A. n=3, l= 1 , m=-1 B.n=3,l=2,m=-1,s=-1/2

Q:- 0.5L gaseous hydrocarbon on complete combustion gives 1500ml of CO2(g) and 2000ml of H2O(g) under similar condition of 'temperature and pressure'. Dertermine formula of gaseous hydrocarbon?