46295 + Interview Questions in Chemistry

1.	Question 03.During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to(a) absorb the evolved gas(b) moisten the gas(c) absorb moisture from the gas(d) absorb Cl− ions from the evolved gas
Answer» Question 03. During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to (a) absorb the evolved gas (b) moisten the gas (c) absorb moisture from the gas (d) absorb ${Cl}^{-}$ ions from the evolved gas

Discussion

2.	Question 09 Number of angular nodes for 4d orbital is ........ (a) 4 (b) 3 (c) 2 (d) 1
Answer» Question 09 Number of angular nodes for 4d orbital is ........ (a) 4 (b) 3 (c) 2 (d) 1

2.

Question 09 Number of angular nodes for 4d orbital is ........ (a) 4 (b) 3 (c) 2 (d) 1

Answer»

Question 09

Number of angular nodes for 4d orbital is ........

(a) 4 (b) 3 (c) 2 (d) 1

Discussion

3.	ntTwo elements A and B [atomic weights 75 and 16 respectively ] combine to give a compound having 75.8% of A. The compound has the formulan
Answer» ntTwo elements A and B [atomic weights 75 and 16 respectively ] combine to give a compound having 75.8% of A. The compound has the formulan

Discussion

4.	12 ml of mix. containing co and n required 7ml oxygen to form co2 and no on combustion the vol. of co require
Answer» 12 ml of mix. containing co and n required 7ml oxygen to form co2 and no on combustion the vol. of co require

Discussion

5.	Fora reaction, A + B →Product; the rate law is given by,.What is the order of the reaction?
Answer» For a reaction, A + B → Product; the rate law is given by,. What is the order of the reaction?

Discussion

6.	In gaseous reactions important for the understanding of the upper atmosphere H2O and O react bimolecularly to form two OH radicals. ΔH for this reaction is 72 kJ at 500 K and Ea is 77 kJ mol-1, then Ea for the bimolecular recombination of two OH radicals to form H2O and O is:
Answer» In gaseous reactions important for the understanding of the upper atmosphere $H_{2} O$ and $O$ react bimolecularly to form two $O H$ radicals. $Δ H$ for this reaction is $72$ kJ at $500$ K and $E_{a}$ is $77$ kJ mol^-1, then $E_{a}$ for the bimolecular recombination of two $O H$ radicals to form $H_{2} O$ and $O$ is:

Discussion

7.	27. Formation of Mesitylene by acetone mechanism . Explain .
Answer» 27. Formation of Mesitylene by acetone mechanism . Explain .

Discussion

8.	what is degree of dissociation of acid
Answer» what is degree of dissociation of acid

Discussion

9.	The pair of electron in the given carbanion , CH3C≡C− is present in which of the following orbitals ?
Answer» The pair of electron in the given carbanion , $C H_{3} C \equiv C^{-}$ is present in which of the following orbitals ?

Discussion

10.	The vapour pressure of water at 80∘C is 355 mm of Hg. The total pressure of a 1.5 L vessel containing O2 saturated with water at 80∘C is 760 mm of Hg. The contents of the vessel are pumped into a 3 L vessel at the same temperature. What is the partial pressure of O2?
Answer» The vapour pressure of water at $80^{\circ} C$ is $355 mm$ of $H g$ . The total pressure of a $1.5 L$ vessel containing $O_{2}$ saturated with water at $80^{\circ} C$ is $760 mm$ of $H g$ . The contents of the vessel are pumped into a $3 L$ vessel at the same temperature. What is the partial pressure of $O_{2}$ ?

Discussion

11.	Volume strength of 1.5 N H2O2 is :
Answer» Volume strength of $1.5 N H_{2} O_{2}$ is :

Discussion

12.	HCl gas is passed through an aqueous solution of 0.1 M 1−aminorpopane (PrNH2) till the pH reaches 9.71. Calculate the ratio of [PrNH2]/[PrNH3]+ in this solution:Given:Ka(PrNH+3)=1.96×10−11log(−9.71)=1.95×10−10
Answer» $H C l$ gas is passed through an aqueous solution of $0.1 M$ $1 - a m i n o r p o p a n e$ $(P r N H_{2})$ till the $p H$ reaches $9.71$ . Calculate the ratio of $[P r N H_{2}] / [P r N H_{3}]^{+}$ in this solution: $Given: K_{a} (P r N H_{3}^{+}) = 1.96 \times 10^{- 11} log (- 9.71) = 1.95 \times 10^{- 10}$

Discussion

13.	Which of the following are diasteromers?
Answer» Which of the following are diasteromers?

Discussion

14.	79 Why is hydroquinone having non-zero dipole moment while p-dichlorobenzene has zero dipole moment ?
Answer» 79 Why is hydroquinone having non-zero dipole moment while p-dichlorobenzene has zero dipole moment ?

Discussion

15.	Which of the following reactions gives a meso compound as the main product?
Answer» Which of the following reactions gives a meso compound as the main product?

Discussion

16.	24. When do Allenes and biphenyls show optical activity?
Answer» 24. When do Allenes and biphenyls show optical activity?

Discussion

17.	Pick out most reactive alkyl halide for SN1 reaction.
Answer» Pick out most reactive alkyl halide for $S_{N} 1$ reaction.

Discussion

18.	In the formula: v= 2πe²/nh what does "e" represents here? Also state its numerical value.
Answer» In the formula: v= 2πe²/nh what does "e" represents here? Also state its numerical value.

Discussion

19.	If the velocity V, acceleration A and force F are taken as fundamental quantities instead of mass M, length L and time T, the dimensions of Young’s modulus Y would be
Answer» If the velocity V, acceleration A and force F are taken as fundamental quantities instead of mass M, length L and time T, the dimensions of Young’s modulus Y would be

Discussion

20.	Question 01 Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs. (a)[NF3 and BF3] (b) [BF−4 and NH+4] (c) [BCl3 and BrCl3] (d) [NH3 and NO−3]
Answer» Question 01 Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs. (a) $[N F_{3} a n d B F_{3}]$ (b) $[B F_{4}^{-} a n d N H_{4}^{+}]$ (c) $[B C l_{3} a n d B r C l_{3}]$ (d) $[N H_{3} a n d N O_{3}^{-}]$

20.

Question 01 Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs. (a)[NF3 and BF3] (b) [BF−4 and NH+4] (c) [BCl3 and BrCl3] (d) [NH3 and NO−3]

Answer»

Question 01

Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs.

(a) $[N F_{3} a n d B F_{3}]$

(b) $[B F_{4}^{-} a n d N H_{4}^{+}]$

(c) $[B C l_{3} a n d B r C l_{3}]$

(d) $[N H_{3} a n d N O_{3}^{-}]$

Discussion

21.	(a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden. Symbols of these are given below. Complete the puzzle.1. CI 7. He2. H 8. F 3. Ar 9. Kr4. O 10. Rn5. Xe 11. Ne6. N(b) Identify the total number of inert gases, their names, and symbols from this crossword puzzle.
Answer» (a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden. Symbols of these are given below. Complete the puzzle. 1. CI 7. He 2. H 8. F 3. Ar 9. Kr 4. O 10. Rn 5. Xe 11. Ne 6. N (b) Identify the total number of inert gases, their names, and symbols from this crossword puzzle.

21.

(a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden. Symbols of these are given below. Complete the puzzle.1. CI 7. He2. H 8. F 3. Ar 9. Kr4. O 10. Rn5. Xe 11. Ne6. N(b) Identify the total number of inert gases, their names, and symbols from this crossword puzzle.

Answer»

(a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden. Symbols of these are given below. Complete the puzzle.

1. CI 7. He

2. H 8. F

3. Ar 9. Kr

4. O 10. Rn

5. Xe 11. Ne

6. N

(b) Identify the total number of inert gases, their names, and symbols from this crossword puzzle.

Discussion

22.	Which of the following orbitals give a zero overlap?
Answer» Which of the following orbitals give a zero overlap?

Discussion

23.	Reactivity order of CH3CHO, C2H5COCH3 and CH3COCH3 with HCN
Answer» Reactivity order of CH3CHO, C2H5COCH3 and CH3COCH3 with HCN

Discussion

24.	How did the narrator learn to distinguish between 'a flask' and 'a thermos'?
Answer» How did the narrator learn to distinguish between 'a flask' and 'a thermos'?

Discussion

25.	50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount (in g) of NaOH in 50 mL of the given sodium hydroxide solution is :
Answer» 50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount (in g) of NaOH in 50 mL of the given sodium hydroxide solution is :

Discussion

26.	a mixture of 2.3 formic acid and 4.5 oxalic acid is treated with conc. H2SO4 the evolved gaseous mixture is passed through KOH pelllets. Weight of the remaining product at STP will be
Answer» a mixture of 2.3 formic acid and 4.5 oxalic acid is treated with conc. H2SO4 the evolved gaseous mixture is passed through KOH pelllets. Weight of the remaining product at STP will be

Discussion

27.	If a dye absorbs a photon of wavelength λ and re-emits the absorbed energy as two photons of wavelength λ1 and λ2. Then:
Answer» If a dye absorbs a photon of wavelength $λ$ and re-emits the absorbed energy as two photons of wavelength $λ_{1}$ and $λ_{2}$ . Then:

Discussion

28.	Among the following amines, the strongest Bronsted base is
Answer» Among the following amines, the strongest Bronsted base is

Discussion

29.	What is the maximum no. of coplanar atoms in the propadiene(C3H4)
Answer» What is the maximum no. of coplanar atoms in the propadiene(C3H4)

Discussion

30.	How to find coordination number III
Answer» How to find coordination number III

Discussion

31.	ntin the formation of B3N3H9Cl3 by the reaction of inorganic benzene and HCl, which of the following is correct?n nt1)the protonation occurs at B atomn nt2)thye protonation occurs at N atomn nt3)the protonation first occurs at B atom and then rearranges on to N atomn nt4)the protonation first occurs at N atom and then rearranges on to B atomn
Answer» ntin the formation of B3N3H9Cl3 by the reaction of inorganic benzene and HCl, which of the following is correct?n nt1)the protonation occurs at B atomn nt2)thye protonation occurs at N atomn nt3)the protonation first occurs at B atom and then rearranges on to N atomn nt4)the protonation first occurs at N atom and then rearranges on to B atomn

Discussion

32.	The major product in the following conversion is:
Answer» The major product in the following conversion is:

Discussion

33.	For some crystals, the radius ratio for cation and anion is 0.525, its coordination number will be
Answer» For some crystals, the radius ratio for cation and anion is 0.525, its coordination number will be

Discussion

34.	dissociation of Al(OH)3
Answer» dissociation of Al(OH)3

Discussion

35.	22. Why is bridge-head carbocation unstable??
Answer» 22. Why is bridge-head carbocation unstable??

Discussion

36.	why dimension are used ?
Answer» why dimension are used ?

Discussion

37.	What is the value of electron gain enthalpy of Na+ if IE1 of Na =5.1 eV?
Answer» What is the value of electron gain enthalpy of Na+ if IE1 of Na =5.1 eV?

Discussion

38.	In a Young's double slit experiment, the slits are 2 mm apart and the screen is positioned 140 cm away from the plane of the slits. The slits are illuminated with light of wavelength 600 nm. Find the distance of the third bright fringe from the central maximum.
Answer» In a Young's double slit experiment, the slits are $2 mm$ apart and the screen is positioned $140 cm$ away from the plane of the slits. The slits are illuminated with light of wavelength $600 nm$ . Find the distance of the third bright fringe from the central maximum.

Discussion

39.	What is the position of octahedral voids in FCC Unit cell?
Answer» What is the position of octahedral voids in FCC Unit cell?

Discussion

40.	2 Consider the following Reaction SiCl4 + 3Ch3MgCl -> P (Compound with silicon) P + H2O ->Q + HCl 2Q -> -H20 S Select the correct statement about compound S. 1) S can show further removal of water 2) S has one Si-O-Si linkage 3) S is a long chain polymer 4) S is planar
Answer» 2 Consider the following Reaction SiCl4 + 3Ch3MgCl -> P (Compound with silicon) P + H2O ->Q + HCl 2Q -> -H20 S Select the correct statement about compound S. 1) S can show further removal of water 2) S has one Si-O-Si linkage 3) S is a long chain polymer 4) S is planar

Discussion

41.	Methylene chloride on hydrolysis gives
Answer» Methylene chloride on hydrolysis gives

Discussion

42.	A sample of ammonium phosphate (NH4)3PO4 contains 3.18 moles of hydrogen atoms. The number of moles of oxygen atoms in the sample is
Answer» A sample of ammonium phosphate $(N H_{4})_{3} P O_{4}$ contains 3.18 moles of hydrogen atoms. The number of moles of oxygen atoms in the sample is

Discussion

43.	Which of the following neutral molecule does not obey 18 electron rule?
Answer» Which of the following neutral molecule does not obey 18 electron rule?

Discussion

44.	0.004 g NaOH is dissolved in 250 mL of solutionThen choose the correct statement(s):
Answer» $0.004 g N a O H$ is dissolved in $250 m L$ of solution Then choose the correct statement(s):

Discussion

45.	20.0g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity if magnesium carbonate in the sample?(atomic wt.:Mg=24)
Answer» 20.0g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity if magnesium carbonate in the sample?(atomic wt.:Mg=24)

Discussion

46.	11.If p and q are whole numbers,then the number ordered pairs (p,q) which satisfy the equation 2p+3q=25 is 1) 5 2) 4 3) 3 4) 6
Answer» 11.If p and q are whole numbers,then the number ordered pairs (p,q) which satisfy the equation 2p+3q=25 is 1) 5 2) 4 3) 3 4) 6

Discussion

47.	Briefly explain the law of multiple proportions.
Answer» Briefly explain the law of multiple proportions.

Discussion

48.	Which of the following has the minimum heat of dissociation?
Answer» Which of the following has the minimum heat of dissociation?

Discussion

49.	Product would be :
Answer» Product would be :

Discussion

50.	The state of hybridization of C in CO2 is same as that of –
Answer» The state of hybridization of C in $C O_{2}$ is same as that of –

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question 09 Number of angular nodes for 4d orbital is ........ (a) 4 (b) 3 (c) 2 (d) 1

ntTwo elements A and B [atomic weights 75 and 16 respectively ] combine to give a compound having 75.8% of A. The compound has the formulan

12 ml of mix. containing co and n required 7ml oxygen to form co2 and no on combustion the vol. of co require

Fora reaction, A + B →Product; the rate law is given by,.What is the order of the reaction?

In gaseous reactions important for the understanding of the upper atmosphere H2O and O react bimolecularly to form two OH radicals. ΔH for this reaction is 72 kJ at 500 K and Ea is 77 kJ mol-1, then Ea for the bimolecular recombination of two OH radicals to form H2O and O is:

27. Formation of Mesitylene by acetone mechanism . Explain .

what is degree of dissociation of acid

The pair of electron in the given carbanion , CH3C≡C− is present in which of the following orbitals ?

The vapour pressure of water at 80∘C is 355 mm of Hg. The total pressure of a 1.5 L vessel containing O2 saturated with water at 80∘C is 760 mm of Hg. The contents of the vessel are pumped into a 3 L vessel at the same temperature. What is the partial pressure of O2?

Volume strength of 1.5 N H2O2 is :

HCl gas is passed through an aqueous solution of 0.1 M 1−aminorpopane (PrNH2) till the pH reaches 9.71. Calculate the ratio of [PrNH2]/[PrNH3]+ in this solution:Given:Ka(PrNH+3)=1.96×10−11log(−9.71)=1.95×10−10

Which of the following are diasteromers?

79 Why is hydroquinone having non-zero dipole moment while p-dichlorobenzene has zero dipole moment ?

Which of the following reactions gives a meso compound as the main product?

24. When do Allenes and biphenyls show optical activity?

Pick out most reactive alkyl halide for SN1 reaction.

In the formula: v= 2πe²/nh what does "e" represents here? Also state its numerical value.

If the velocity V, acceleration A and force F are taken as fundamental quantities instead of mass M, length L and time T, the dimensions of Young’s modulus Y would be

Question 01 Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs. (a)[NF3 and BF3] (b) [BF−4 and NH+4] (c) [BCl3 and BrCl3] (d) [NH3 and NO−3]

(a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden. Symbols of these are given below. Complete the puzzle.1. CI 7. He2. H 8. F 3. Ar 9. Kr4. O 10. Rn5. Xe 11. Ne6. N(b) Identify the total number of inert gases, their names, and symbols from this crossword puzzle.

Which of the following orbitals give a zero overlap?

Reactivity order of CH3CHO, C2H5COCH3 and CH3COCH3 with HCN

How did the narrator learn to distinguish between 'a flask' and 'a thermos'?

50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount (in g) of NaOH in 50 mL of the given sodium hydroxide solution is :

a mixture of 2.3 formic acid and 4.5 oxalic acid is treated with conc. H2SO4 the evolved gaseous mixture is passed through KOH pelllets. Weight of the remaining product at STP will be

If a dye absorbs a photon of wavelength λ and re-emits the absorbed energy as two photons of wavelength λ1 and λ2. Then:

Among the following amines, the strongest Bronsted base is

What is the maximum no. of coplanar atoms in the propadiene(C3H4)

How to find coordination number III

The major product in the following conversion is:

For some crystals, the radius ratio for cation and anion is 0.525, its coordination number will be

dissociation of Al(OH)3

22. Why is bridge-head carbocation unstable??

why dimension are used ?

What is the value of electron gain enthalpy of Na+ if IE1 of Na =5.1 eV?

In a Young's double slit experiment, the slits are 2 mm apart and the screen is positioned 140 cm away from the plane of the slits. The slits are illuminated with light of wavelength 600 nm. Find the distance of the third bright fringe from the central maximum.

What is the position of octahedral voids in FCC Unit cell?

2 Consider the following Reaction SiCl4 + 3Ch3MgCl -> P (Compound with silicon) P + H2O ->Q + HCl 2Q -> -H20 S Select the correct statement about compound S. 1) S can show further removal of water 2) S has one Si-O-Si linkage 3) S is a long chain polymer 4) S is planar

Methylene chloride on hydrolysis gives

A sample of ammonium phosphate (NH4)3PO4 contains 3.18 moles of hydrogen atoms. The number of moles of oxygen atoms in the sample is

Which of the following neutral molecule does not obey 18 electron rule?

0.004 g NaOH is dissolved in 250 mL of solutionThen choose the correct statement(s):

20.0g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity if magnesium carbonate in the sample?(atomic wt.:Mg=24)

11.If p and q are whole numbers,then the number ordered pairs (p,q) which satisfy the equation 2p+3q=25 is 1) 5 2) 4 3) 3 4) 6

Briefly explain the law of multiple proportions.

Which of the following has the minimum heat of dissociation?

Product would be :

The state of hybridization of C in CO2 is same as that of –