46295 + Interview Questions in Chemistry

1.	Which one of the following can release foul smelling substance on heating with chloroform and ethanolic KOH
Answer» Which one of the following can release foul smelling substance on heating with chloroform and ethanolic KOH

Discussion

2.	17. How to find equivalent weight of metal carbonate? E.g.Na2CO3
Answer» 17. How to find equivalent weight of metal carbonate? E.g.Na2CO3

Discussion

3.	Which of the following equation gives the values of heat of formation (ΔH0f)?
Answer» Which of the following equation gives the values of heat of formation $(Δ H_{f}^{0})$ ?

Discussion

4.	The magnetic moment of KO2 at room temperature is
Answer» The magnetic moment of $K O_{2}$ at room temperature is

Discussion

5.	2.746 g of a compound gave on analysis 1.94 g of silver, 0.268 g of sulphur and 0.538 g of oxygen. Find the empirical formula of the compound. (At. masses: Ag=108, S=32, O=16)
Answer» 2.746 g of a compound gave on analysis 1.94 g of silver, 0.268 g of sulphur and 0.538 g of oxygen. Find the empirical formula of the compound. (At. masses: $A g = 108, S = 32, O = 16$ )

Discussion

6.	Explain why :Phenol is more acidic than ethanol.
Answer» Explain why : Phenol is more acidic than ethanol.

Discussion

7.	9. Arrange the following in increasing order of freezing pt. giving reasons for each- 0.2 M NaOH; 0.2M Na2CO3; 0.1MAgNO3; 0.1M of (NH4)2SO4.FeSO4.6H2O
Answer» 9. Arrange the following in increasing order of freezing pt. giving reasons for each- 0.2 M NaOH; 0.2M Na2CO3; 0.1MAgNO3; 0.1M of (NH4)2SO4.FeSO4.6H2O

Discussion

8.	Among the following, reaction(s) which give(s) tert-butyl benzene as the major product is/are:
Answer» Among the following, reaction(s) which give(s) tert-butyl benzene as the major product is/are:

Discussion

9.	Why are cimetidine and ranitidine better antacids than sodium hydrogen carbonate or magnesium or aluminium hydroxide?
Answer» Why are cimetidine and ranitidine better antacids than sodium hydrogen carbonate or magnesium or aluminium hydroxide?

Discussion

10.	The total number of electrons in the ground state of chromium with magnetic quantum number, m = 0 is:
Answer» The total number of electrons in the ground state of chromium with magnetic quantum number, $m$ = 0 is:

Discussion

11.	1. Solution containing 60 grams par desi metre cube of urea is iso tonic with a 10% solution of a non volatile solute. the molecular mass of this non volatile solute is.
Answer» 1. Solution containing 60 grams par desi metre cube of urea is iso tonic with a 10% solution of a non volatile solute. the molecular mass of this non volatile solute is.

Discussion

12.	how much heat would be absorbed by two litres of an ideal gas at 5atm pressure if it expands isothermally into an evacuated chamber of 5 litre
Answer» how much heat would be absorbed by two litres of an ideal gas at 5atm pressure if it expands isothermally into an evacuated chamber of 5 litre

Discussion

13.	Gases posses charcteristic critical temperature which depends upo the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases. GasesH2HeO2N2Critical temperature in Kelvin33.25.3154.3126 From the above data what would be the order of liquefaction of these gases? Start writing the order from the gas liquefying first (a) H2,He,O2,N2 (b) He,O2,H2,N2 (c) N2,O2,He,H2, (d) O2,N2,H2,He
Answer» Gases posses charcteristic critical temperature which depends upo the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases. $\begin{matrix} G a s e s & H_{2} & H e & O_{2} & N_{2} C r i t i c a l t e m p e r a t u r e i n K e l v i n & 33.2 & 5.3 & 154.3 & 126 \end{matrix}$ From the above data what would be the order of liquefaction of these gases? Start writing the order from the gas liquefying first (a) $H_{2}, H e, O_{2}, N_{2}$ (b) $H e, O_{2}, H_{2}, N_{2}$ (c) $N_{2}, O_{2}, H e, H_{2},$ (d) $O_{2}, N_{2}, H_{2}, H e$

13.

Gases posses charcteristic critical temperature which depends upo the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases. GasesH2HeO2N2Critical temperature in Kelvin33.25.3154.3126 From the above data what would be the order of liquefaction of these gases? Start writing the order from the gas liquefying first (a) H2,He,O2,N2 (b) He,O2,H2,N2 (c) N2,O2,He,H2, (d) O2,N2,H2,He

Answer»

Gases posses charcteristic critical temperature which depends upo the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases.

$\begin{matrix} G a s e s & H_{2} & H e & O_{2} & N_{2} C r i t i c a l t e m p e r a t u r e i n K e l v i n & 33.2 & 5.3 & 154.3 & 126 \end{matrix}$

From the above data what would be the order of liquefaction of these gases? Start writing the order from the gas liquefying first

(a) $H_{2}, H e, O_{2}, N_{2}$ (b) $H e, O_{2}, H_{2}, N_{2}$

(c) $N_{2}, O_{2}, H e, H_{2},$ (d) $O_{2}, N_{2}, H_{2}, H e$

Discussion

14.	69. A mixture of ethane and ethene occupies 40 litere at 1.00atm and 400k. The mixture reacts completely with 130g of O2 to produce Co2 and H2O. Assuming ideal gas behaviour calculate the mole fractions of C2H6 andC2H4 in the mixture.
Answer» 69. A mixture of ethane and ethene occupies 40 litere at 1.00atm and 400k. The mixture reacts completely with 130g of O2 to produce Co2 and H2O. Assuming ideal gas behaviour calculate the mole fractions of C2H6 andC2H4 in the mixture.

Discussion

15.	CaC2+D2O→A+B(gas) BAlkKMnO4−−−−−−−→C. 'C' is
Answer» $C a C_{2} + D_{2} O \to A + B_{(g a s)} B A l k K M n O_{4} - ------ \to C .$ 'C' is

Discussion

16.	134.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 A^°. Also, find the time between two successive collisions.
Answer» 134.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 A^°. Also, find the time between two successive collisions.

Discussion

17.	what is the average oxidation number of Fe in compound Fe3O
Answer» what is the average oxidation number of Fe in compound Fe3O

Discussion

18.	The charcoal maintained at −100∘ C adsorbs
Answer» The charcoal maintained at $- 100^{\circ}$ C adsorbs

Discussion

19.	Packing fraction of face centered cibic unit cell
Answer» Packing fraction of face centered cibic unit cell

Discussion

20.	In solid state of PCl5, the hybridsation of 'P'is
Answer» In solid state of $P C l_{5}$ , the hybridsation of 'P'is

Discussion

21.	In an atom with 2K 8L 13M 2N electrons maximum possible electrons with m=0 s=1/2 is
Answer» In an atom with 2K 8L 13M 2N electrons maximum possible electrons with m=0 s=1/2 is

Discussion

22.	Which of the following procedures would be best for the preparation of phenyl benzyl ether?
Answer» Which of the following procedures would be best for the preparation of phenyl benzyl ether?

Discussion

23.	In the reaction is:
Answer» In the reaction is:

Discussion

24.	an aqueous solution of acetone contain 29% acetone solution by weight . mole %age of acetone in this solution and mass percentage of acetone also calculate
Answer» an aqueous solution of acetone contain 29% acetone solution by weight . mole %age of acetone in this solution and mass percentage of acetone also calculate

Discussion

25.	All the following compounds are intermediateof citric acid cycle except
Answer» All the following compounds are intermediate of citric acid cycle except

Discussion

26.	ClCH2CHCl2alc. base−−−−→ A'A' is:
Answer» ${ClCH}_{2} {CHCl}_{2} alc . base - --- \to A$ 'A' is:

Discussion

27.	When FeCl3 is treated with K4[Fe(CN)6], a blue coloured compound is formed. What are the total number of atoms per formula molecule? (supposing no K is present in blue coloured compound)
Answer» When $F e C l_{3}$ is treated with $K_{4} [F e (C N)_{6}]$ , a blue coloured compound is formed. What are the total number of atoms per formula molecule? (supposing no K is present in blue coloured compound)

Discussion

28.	The molar solubilities of helium, nitrogen, and oxygen are plotted against the partial pressure of the gases at a constant temperature. Henry’s law constant for these gases will lie in the following sequence:
Answer» The molar solubilities of helium, nitrogen, and oxygen are plotted against the partial pressure of the gases at a constant temperature. Henry’s law constant for these gases will lie in the following sequence:

Discussion

29.	N2 + 3H2. = 2NH31. How many molecules of ammonia will be obtained by 10 g of Nitrogen2. What mass of ammonia will be produced by 10 raise to power 20 molecules of Hydrogen3. What volume of ammonia will be produced by 10 raise to power 20 molecules of nitrogen4. What volume of hydrogen will be produced by 34 g of ammonia
Answer» N2 + 3H2. = 2NH3 1. How many molecules of ammonia will be obtained by 10 g of Nitrogen 2. What mass of ammonia will be produced by 10 raise to power 20 molecules of Hydrogen 3. What volume of ammonia will be produced by 10 raise to power 20 molecules of nitrogen 4. What volume of hydrogen will be produced by 34 g of ammonia

Discussion

30.	The compound A on treating with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A,B and C are in the order
Answer» The compound A on treating with $N a$ gives $B$ , and with $P C l_{5}$ gives $C$ . $B$ and $C$ react together to give diethyl ether. $A, B$ and $C$ are in the order

Discussion

31.	Which of the following has maximum no. of unpaired e−
Answer» Which of the following has maximum no. of unpaired $e^{-}$

Discussion

32.	The correct statements regarding the acids are A) NH3 can act as both bronsted base as well as Lewis base B) Dry hydrogen chloride is not Arrhenius acid C) According to Davy, acid must contain oxygen as necessary element
Answer» The correct statements regarding the acids are A) $N H_{3}$ can act as both bronsted base as well as Lewis base B) Dry hydrogen chloride is not Arrhenius acid C) According to Davy, acid must contain oxygen as necessary element

32.

The correct statements regarding the acids are A) NH3 can act as both bronsted base as well as Lewis base B) Dry hydrogen chloride is not Arrhenius acid C) According to Davy, acid must contain oxygen as necessary element

Answer»

The correct statements regarding the acids are

A) $N H_{3}$ can act as both bronsted base as well as Lewis base

B) Dry hydrogen chloride is not Arrhenius acid

C) According to Davy, acid must contain oxygen as necessary element

Discussion

33.	4.9 g of K2Cr2O7 is taken to prepare 0.1 L of the solution. In acidic medium 5 mL of this solution is further taken to oxidize Sn2+ ion into Sn4+ ion. If Sn4+ so produced is used in 2nd reaction to prepare Fe3+ ion from Fe2+, then the millimoles of Fe3+ ion formed will be:(Assume all other components are in sufficient amount) [Molar mass of K2Cr2O7=294 g mol−1]
Answer» $4.9 g$ of $K_{2} C r_{2} O_{7}$ is taken to prepare $0.1 L$ of the solution. In acidic medium $5 mL$ of this solution is further taken to oxidize $S n^{2 +}$ ion into $S n^{4 +}$ ion. If $S n^{4 +}$ so produced is used in $2^{n d}$ reaction to prepare $F e^{3 +}$ ion from $F e^{2 +,}$ then the millimoles of $F e^{3 +}$ ion formed will be: (Assume all other components are in sufficient amount) [Molar mass of $K_{2} C r_{2} O_{7} = 294 {g mol}^{- 1}]$

Discussion

34.	12.976g of lead combines with 2.004g of oxygen to form PbO2. PbO2 can also be produced by heating lead nitrate and it was found that the pecentage of oxygen present in PbO2 is 13.38% with the help of given information illustrate the law of constant composition.
Answer» 12.976g of lead combines with 2.004g of oxygen to form PbO2. PbO2 can also be produced by heating lead nitrate and it was found that the pecentage of oxygen present in PbO2 is 13.38% with the help of given information illustrate the law of constant composition.

Discussion

35.	Complete the following reactions: (i) C6H5NH2+CHCl3+alc.KOH→ (ii) C6H5N2Cl3+H3PO2+H2O→ (iii) C6H5NH2+H2SO4(conc.)→ (iv) C6H5N2Cl+C2H5OH→ (v) C6H5NH2+Br2(aq)→ (vi) C6H5NH2+(CH3CO)2→ (vii) C6H5N2Cl(i)HBF4−−−−−−−−−−−→(ii)NaNO2/Cu,Δ
Answer» Complete the following reactions: (i) $C_{6} H_{5} N H_{2} + C H C l_{3} + a l c . K O H \to$ (ii) $C_{6} H_{5} N_{2} C l_{3} + H_{3} P O_{2} + H_{2} O \to$ (iii) $C_{6} H_{5} N H_{2} + H_{2} S O_{4} (c o n c .) \to$ (iv) $C_{6} H_{5} N_{2} C l + C_{2} H_{5} O H \to$ (v) $C_{6} H_{5} N H_{2} + B r_{2} (a q) \to$ (vi) $C_{6} H_{5} N H_{2} + (C H_{3} C O)_{2} \to$ (vii) $C_{6} H_{5} N_{2} C l (i) H B F_{4} - ---------- \to (i i) N a N O_{2} / C u, Δ$

35.

Complete the following reactions: (i) C6H5NH2+CHCl3+alc.KOH→ (ii) C6H5N2Cl3+H3PO2+H2O→ (iii) C6H5NH2+H2SO4(conc.)→ (iv) C6H5N2Cl+C2H5OH→ (v) C6H5NH2+Br2(aq)→ (vi) C6H5NH2+(CH3CO)2→ (vii) C6H5N2Cl(i)HBF4−−−−−−−−−−−→(ii)NaNO2/Cu,Δ

Answer»

Complete the following reactions:

(i) $C_{6} H_{5} N H_{2} + C H C l_{3} + a l c . K O H \to$

(ii) $C_{6} H_{5} N_{2} C l_{3} + H_{3} P O_{2} + H_{2} O \to$

(iii) $C_{6} H_{5} N H_{2} + H_{2} S O_{4} (c o n c .) \to$

(iv) $C_{6} H_{5} N_{2} C l + C_{2} H_{5} O H \to$

(v) $C_{6} H_{5} N H_{2} + B r_{2} (a q) \to$

(vi) $C_{6} H_{5} N H_{2} + (C H_{3} C O)_{2} \to$

(vii) $C_{6} H_{5} N_{2} C l (i) H B F_{4} - ---------- \to (i i) N a N O_{2} / C u, Δ$

Discussion

36.	7. Two isotopes of Boron have atomic mass 10 and 11.Calculate percentage abundance of lighter isotope in a sample of Boron having average atomic mass 10.8.
Answer» 7. Two isotopes of Boron have atomic mass 10 and 11.Calculate percentage abundance of lighter isotope in a sample of Boron having average atomic mass 10.8.

Discussion

37.	As we know that enthalpy change occurs at constant temperature and constant pressure and internal energy change is carried out at constant temperature and constant volume then why in isothermal process the delta U and delta H becomes equal to zero where temperature is also constant?
Answer» As we know that enthalpy change occurs at constant temperature and constant pressure and internal energy change is carried out at constant temperature and constant volume then why in isothermal process the delta U and delta H becomes equal to zero where temperature is also constant?

Discussion

38.	Almost all metals combine with oxygen to form metal oxides It is true or false?
Answer» Almost all metals combine with oxygen to form metal oxides It is true or false?

Discussion

39.	5. 2.76 gm of silver carbonate on being strongly heated at quite high temp yeilds a residue with how much weight
Answer» 5. 2.76 gm of silver carbonate on being strongly heated at quite high temp yeilds a residue with how much weight

Discussion

40.	In a problem if it is not given how to know whether it is elastic or inelastic collision? (note-e value is also not given)
Answer» In a problem if it is not given how to know whether it is elastic or inelastic collision? (note-e value is also not given)

Discussion

41.	2.46×10 to the power of -3 kg of NaOH is dissolved in water and the total volume comes to 0.1 dm cube in a volumetric flask Calculate M
Answer» 2.46×10 to the power of -3 kg of NaOH is dissolved in water and the total volume comes to 0.1 dm cube in a volumetric flask Calculate M

Discussion

42.	The number of moles of BaCl2.2H2O in a pure sample that contains 38 kilomoles of oxygen atoms is .
Answer» The number of moles of $B a C l_{2} . 2 H_{2} O$ in a pure sample that contains $\frac{3}{8}$ kilomoles of oxygen atoms is .

Discussion

43.	Concentratednitric acid used in laboratory work is 68% nitric acid by mass inaqueous solution. What should be the molarity of such a sample of theacid if the density of the solution is 1.504 g mL−1?
Answer» Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is 1.504 g mL⁻¹?

Discussion

44.	The reaction of aqueous KMnO4 with H2O2 in acidic conditions gives
Answer» The reaction of aqueous $K M n O_{4}$ with $H_{2} O_{2}$ in acidic conditions gives

Discussion

45.	Symbols canbe written, whereas symbolsare not acceptable. Answer briefly.
Answer» Symbols can be written, whereas symbols are not acceptable. Answer briefly.

Discussion

46.	A compound of vanadium possess a magnetic moment of 1.73 B.M. What is the oxidation state of vanadium in the compound
Answer» A compound of vanadium possess a magnetic moment of 1.73 B.M. What is the oxidation state of vanadium in the compound

Discussion

47.	what is the value of 1u?
Answer» what is the value of 1u?

Discussion

48.	CH_3OH\xrightarrow[{\lbrack CH_2Cl_2}]{PCC}A find "A"
Answer» CH_3OH\xrightarrow[{\lbrack CH_2Cl_2}]{PCC}A find "A"

Discussion

49.	How many stereoisomers does 2,3,4-trichloropentane has?
Answer» How many stereoisomers does 2,3,4-trichloropentane has?

Discussion

50.	Draw all the resonating structures of guanodine (most basic amongst organic bases)
Answer» Draw all the resonating structures of guanodine (most basic amongst organic bases)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which one of the following can release foul smelling substance on heating with chloroform and ethanolic KOH

17. How to find equivalent weight of metal carbonate? E.g.Na2CO3

Which of the following equation gives the values of heat of formation (ΔH0f)?

The magnetic moment of KO2 at room temperature is

2.746 g of a compound gave on analysis 1.94 g of silver, 0.268 g of sulphur and 0.538 g of oxygen. Find the empirical formula of the compound. (At. masses: Ag=108, S=32, O=16)

Explain why :Phenol is more acidic than ethanol.

9. Arrange the following in increasing order of freezing pt. giving reasons for each- 0.2 M NaOH; 0.2M Na2CO3; 0.1MAgNO3; 0.1M of (NH4)2SO4.FeSO4.6H2O

Among the following, reaction(s) which give(s) tert-butyl benzene as the major product is/are:

Why are cimetidine and ranitidine better antacids than sodium hydrogen carbonate or magnesium or aluminium hydroxide?

The total number of electrons in the ground state of chromium with magnetic quantum number, m = 0 is:

1. Solution containing 60 grams par desi metre cube of urea is iso tonic with a 10% solution of a non volatile solute. the molecular mass of this non volatile solute is.

how much heat would be absorbed by two litres of an ideal gas at 5atm pressure if it expands isothermally into an evacuated chamber of 5 litre

69. A mixture of ethane and ethene occupies 40 litere at 1.00atm and 400k. The mixture reacts completely with 130g of O2 to produce Co2 and H2O. Assuming ideal gas behaviour calculate the mole fractions of C2H6 andC2H4 in the mixture.

CaC2+D2O→A+B(gas) BAlkKMnO4−−−−−−−→C. 'C' is

134.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 A^°. Also, find the time between two successive collisions.

what is the average oxidation number of Fe in compound Fe3O

The charcoal maintained at −100∘ C adsorbs

Packing fraction of face centered cibic unit cell

In solid state of PCl5, the hybridsation of 'P'is

In an atom with 2K 8L 13M 2N electrons maximum possible electrons with m=0 s=1/2 is

Which of the following procedures would be best for the preparation of phenyl benzyl ether?

In the reaction is:

an aqueous solution of acetone contain 29% acetone solution by weight . mole %age of acetone in this solution and mass percentage of acetone also calculate

All the following compounds are intermediateof citric acid cycle except

ClCH2CHCl2alc. base−−−−→ A'A' is:

When FeCl3 is treated with K4[Fe(CN)6], a blue coloured compound is formed. What are the total number of atoms per formula molecule? (supposing no K is present in blue coloured compound)

The molar solubilities of helium, nitrogen, and oxygen are plotted against the partial pressure of the gases at a constant temperature. Henry’s law constant for these gases will lie in the following sequence:

The compound A on treating with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A,B and C are in the order

Which of the following has maximum no. of unpaired e−

The correct statements regarding the acids are A) NH3 can act as both bronsted base as well as Lewis base B) Dry hydrogen chloride is not Arrhenius acid C) According to Davy, acid must contain oxygen as necessary element

12.976g of lead combines with 2.004g of oxygen to form PbO2. PbO2 can also be produced by heating lead nitrate and it was found that the pecentage of oxygen present in PbO2 is 13.38% with the help of given information illustrate the law of constant composition.

Complete the following reactions: (i) C6H5NH2+CHCl3+alc.KOH→ (ii) C6H5N2Cl3+H3PO2+H2O→ (iii) C6H5NH2+H2SO4(conc.)→ (iv) C6H5N2Cl+C2H5OH→ (v) C6H5NH2+Br2(aq)→ (vi) C6H5NH2+(CH3CO)2→ (vii) C6H5N2Cl(i)HBF4−−−−−−−−−−−→(ii)NaNO2/Cu,Δ

7. Two isotopes of Boron have atomic mass 10 and 11.Calculate percentage abundance of lighter isotope in a sample of Boron having average atomic mass 10.8.

As we know that enthalpy change occurs at constant temperature and constant pressure and internal energy change is carried out at constant temperature and constant volume then why in isothermal process the delta U and delta H becomes equal to zero where temperature is also constant?

Almost all metals combine with oxygen to form metal oxides It is true or false?

5. 2.76 gm of silver carbonate on being strongly heated at quite high temp yeilds a residue with how much weight

In a problem if it is not given how to know whether it is elastic or inelastic collision? (note-e value is also not given)

2.46×10 to the power of -3 kg of NaOH is dissolved in water and the total volume comes to 0.1 dm cube in a volumetric flask Calculate M

The number of moles of BaCl2.2H2O in a pure sample that contains 38 kilomoles of oxygen atoms is .

Concentratednitric acid used in laboratory work is 68% nitric acid by mass inaqueous solution. What should be the molarity of such a sample of theacid if the density of the solution is 1.504 g mL−1?

The reaction of aqueous KMnO4 with H2O2 in acidic conditions gives

Symbols canbe written, whereas symbolsare not acceptable. Answer briefly.

A compound of vanadium possess a magnetic moment of 1.73 B.M. What is the oxidation state of vanadium in the compound

what is the value of 1u?

CH_3OH\xrightarrow[{\lbrack CH_2Cl_2}]{PCC}A find "A"

How many stereoisomers does 2,3,4-trichloropentane has?

Draw all the resonating structures of guanodine (most basic amongst organic bases)