46295 + Interview Questions in Chemistry

1.	Which of the following is planar? (1)CH3+ (2)BH4- (3)SO4-2 (4)NF3
Answer» Which of the following is planar? (1)CH3+ (2)BH4- (3)SO4-2 (4)NF3

Discussion

2.	Amongst H2O, H2S, H2Se and H2Te, the one with the highest boiling point is -
Answer» Amongst $H_{2} O$ , $H_{2} S$ , $H_{2} S e$ and $H_{2} T e$ , the one with the highest boiling point is -

Discussion

3.	The fraction of the total volume occupied by the atoms present in a simple cube is
Answer» The fraction of the total volume occupied by the atoms present in a simple cube is

Discussion

4.	If 'Z' is the number of atoms in the unit cell that represents the closestpacking sequence the number of tetrahedral voids inthe unit cell is equal to[AIIMS 2005]
Answer» If 'Z' is the number of atoms in the unit cell that represents the closest packing sequence the number of tetrahedral voids in the unit cell is equal to [AIIMS 2005]

4.

If 'Z' is the number of atoms in the unit cell that represents the closestpacking sequence the number of tetrahedral voids inthe unit cell is equal to[AIIMS 2005]

Answer»

If 'Z' is the number of atoms in the unit cell that represents the closest

packing sequence the number of tetrahedral voids in

the unit cell is equal to

[AIIMS 2005]

Discussion

5.	An electron with de-Broglie wavelength λ fall on the target in an X-rays tube. The cut-off wavelength λ0 of the emitted X-rays is
Answer» An electron with de-Broglie wavelength $λ$ fall on the target in an $X$ -rays tube. The cut-off wavelength $λ_{0}$ of the emitted $X$ -rays is

Discussion

6.	The reaction of conc. HNO3 with conc. H2SO4 gives:
Answer» The reaction of conc. $H N O_{3}$ with conc. $H_{2} S O_{4}$ gives:

Discussion

7.	The major product [B] in the following reactions is
Answer» The major product [B] in the following reactions is

Discussion

8.	Which is the minimum values of r+/r− needed to prevent anion-anion contact in NaCl crystals?
Answer» Which is the minimum values of $r_{+} / r_{-}$ needed to prevent anion-anion contact in $N a C l$ crystals?

Discussion

9.	EDTA always acts as hexadentate ligend. True or false. If false why?
Answer» EDTA always acts as hexadentate ligend. True or false. If false why?

Discussion

10.	nt2.56g sulphur in 100g CS2 has depression in freezing point of 0.010, Kf=0.1. hence atomicity of sulphur in the solution isn
Answer» nt2.56g sulphur in 100g CS2 has depression in freezing point of 0.010, Kf=0.1. hence atomicity of sulphur in the solution isn

Discussion

11.	Among the following oxacids, the correct decreasing order of acidic strength is
Answer» Among the following oxacids, the correct decreasing order of acidic strength is

Discussion

12.	Is blood homogeneous mixture? Since homogeniety is measured in two scale- visible scale and microscopic scale In visible scale we can see that it is homogeneous mixture but in microscopic scale there is difference between the RBC, WBC and many more particles. Thus blood is homogeneous mixture or heterogeneous mixture?
Answer» Is blood homogeneous mixture? Since homogeniety is measured in two scale- visible scale and microscopic scale In visible scale we can see that it is homogeneous mixture but in microscopic scale there is difference between the RBC, WBC and many more particles. Thus blood is homogeneous mixture or heterogeneous mixture?

12.

Is blood homogeneous mixture? Since homogeniety is measured in two scale- visible scale and microscopic scale In visible scale we can see that it is homogeneous mixture but in microscopic scale there is difference between the RBC, WBC and many more particles. Thus blood is homogeneous mixture or heterogeneous mixture?

Answer»

Is blood homogeneous mixture?

Since homogeniety is measured in two scale- visible scale and microscopic scale

In visible scale we can see that it is homogeneous mixture but in microscopic scale there is difference between the RBC, WBC and many more particles. Thus blood is homogeneous mixture or heterogeneous mixture?

Discussion

13.	20. Why on diluting an electrolyte it's K(specific conductivity) decreases while it's molar conductivity increases?
Answer» 20. Why on diluting an electrolyte it's K(specific conductivity) decreases while it's molar conductivity increases?

Discussion

14.	The vapour density (Hydrogen=1)of a mixture consisting of NO2 and N2O4 is 38.3 at 26.7 degree centigrade. Calculate the number of moles of NO2 in 100 gram of the mixture.
Answer» The vapour density (Hydrogen=1)of a mixture consisting of NO2 and N2O4 is 38.3 at 26.7 degree centigrade. Calculate the number of moles of NO2 in 100 gram of the mixture.

Discussion

15.	Sum of all the factors of 56 is .
Answer» Sum of all the factors of 56 is .

Discussion

16.	What is the cause for the bleaching action of chlorine?
Answer» What is the cause for the bleaching action of chlorine?

Discussion

17.	Column 1: Name and formula of compound Column 2: Name of the reaction. Column 3: Major product of reaction. The only correct combination in which enolate is formed:
Answer» Column 1: Name and formula of compound Column 2: Name of the reaction. Column 3: Major product of reaction. The only correct combination in which enolate is formed:

17.

Column 1: Name and formula of compound Column 2: Name of the reaction. Column 3: Major product of reaction. The only correct combination in which enolate is formed:

Answer»

Column 1: Name and formula of compound Column

2: Name of the reaction. Column 3:

Major product of reaction.

The only correct combination in which enolate is formed:

Discussion

18.	Reaction at support 'B' of the structure shown is
Answer» Reaction at support 'B' of the structure shown is

Discussion

19.	The formal charges on Cl in HClO and ClO− ions repectively are:
Answer» The formal charges on $C l$ in $H C l O$ and $C l O^{-}$ ions repectively are:

Discussion

20.	At 80 oC, the vapour pressure of pure liquid ′A′ is 520 mm Hg and that of pure liquid ′B′ is 1000 mm Hg. If a mixture of ′A′ and ′B′ boils at 80 oC and 1 atm pressure, the amount of ′A′ (in mole percent) in the mixture is:(1 atm=760 mm Hg)
Answer» At $80^{o} C$ , the vapour pressure of pure liquid $^{'} A^{'}$ is $520 mm Hg$ and that of pure liquid $^{'} B^{'}$ is $1000 mm Hg$ . If a mixture of $^{'} A^{'}$ and $^{'} B^{'}$ boils at $80^{o} C$ and $1 atm$ pressure, the amount of $^{'} A^{'}$ (in mole percent) in the mixture is: ( $1 atm = 760 mm Hg$ )

Discussion

21.	Variable valency is a property of
Answer» Variable valency is a property of

Discussion

22.	The geometry of Ni(CO)4 and Ni(PH3)4 Cl2 are
Answer» The geometry of $N i (C O)_{4} a n d N i (P H_{3})_{4} C l_{2}$ are

Discussion

23.	37.A solution of 1.25 gram of a nonelectrolyte in 20 gram of water freezes at 271.94 Kelvin If Kf=1.86 K/ molality then the molecular weight of the solute is 1)207.8 2)179.79 3)209.6 4)96.01
Answer» 37.A solution of 1.25 gram of a nonelectrolyte in 20 gram of water freezes at 271.94 Kelvin If Kf=1.86 K/ molality then the molecular weight of the solute is 1)207.8 2)179.79 3)209.6 4)96.01

Discussion

24.	How many cyclic structures are possible for C4H6?
Answer» How many cyclic structures are possible for $C_{4} H_{6}$ ?

Discussion

25.	Which of the following statement about C=O and C=C is correct?
Answer» Which of the following statement about C=O and C=C is correct?

Discussion

26.	What will be the ratio of the wavelength of the first line to that of the second line of Paschen Series of H atom ?
Answer» What will be the ratio of the wavelength of the first line to that of the second line of Paschen Series of $H$ atom ?

Discussion

27.	A compound ′X′ having molecular formula C5H8, reacts with ammoniacal AgNO3 to give a white precipitate and reacts with excess of KMnO4 to give the acid, (CH3)2CH−COOH. Therefore, X is:
Answer» A compound $^{'} X^{'}$ having molecular formula $C_{5} H_{8}$ , reacts with ammoniacal $A g N O_{3}$ to give a white precipitate and reacts with excess of $K M n O_{4}$ to give the acid, $(C H_{3})_{2} C H - C O O H$ . Therefore, $X$ is:

Discussion

28.	44.For the reaction pcl5 - pcl3 + com a) delta h = delta e b) del h > del a C) del h < del e
Answer» 44.For the reaction pcl5 - pcl3 + com a) delta h = delta e b) del h > del a C) del h < del e

Discussion

29.	10.6 Arrange each set of compounds in order of increasing boiling points. (i) Bromomethane, Bromoform, Chloromethane, Dibromomethane. { (ii) 1 -Chloropropane, Isopropyl chloride, 1-Chlorobutane.
Answer» 10.6 Arrange each set of compounds in order of increasing boiling points. (i) Bromomethane, Bromoform, Chloromethane, Dibromomethane. { (ii) 1 -Chloropropane, Isopropyl chloride, 1-Chlorobutane.

Discussion

30.	In which of the following arrangements a metal could have least density?
Answer» In which of the following arrangements a metal could have least density?

Discussion

31.	Why does bromine get attached to CH2 in 4_ethylnitrobenzene when the latter reacts with Br2 in presence of UV light?? Why the attachment to CH3 of ethyl group is not favoured??
Answer» Why does bromine get attached to CH2 in 4_ethylnitrobenzene when the latter reacts with Br2 in presence of UV light?? Why the attachment to CH3 of ethyl group is not favoured??

Discussion

32.	Calculate the pH of 0.1 M NH4Cl solution in water :Kb(NH4OH)=1.8×10−5,log1.8=0.25
Answer» Calculate the $p H$ of $0.1 M$ $N H_{4} C l$ solution in water : $K_{b} (N H_{4} O H) = 1.8 \times 10^{- 5}, l o g 1.8 = 0.25$

Discussion

33.	How to calculate the hybridization of ethane with H=½\lbrack V+M-C+A\rbrack
Answer» How to calculate the hybridization of ethane with H=½\lbrack V+M-C+A\rbrack

Discussion

34.	According to EAN rule, how many CO groups should be attached to Fe?
Answer» According to $E A N$ rule, how many $C O$ groups should be attached to $F e$ ?

Discussion

35.	Question 16Which of the following symbols of elements are incorrect? Give their correct symbols (a) Cobalt CO(b) Carbon c(c) Aluminium AL(d) Helium He(e) Sodium So
Answer» Question 16 Which of the following symbols of elements are incorrect? Give their correct symbols (a) Cobalt CO (b) Carbon c (c) Aluminium AL (d) Helium He (e) Sodium So

35.

Question 16Which of the following symbols of elements are incorrect? Give their correct symbols (a) Cobalt CO(b) Carbon c(c) Aluminium AL(d) Helium He(e) Sodium So

Answer»

Question 16

Which of the following symbols of elements are incorrect? Give their correct symbols

(a) Cobalt CO

(b) Carbon c

(c) Aluminium AL

(d) Helium He

(e) Sodium So

Discussion

36.	Sum of nodal planes of HOMO of O2+ and N2+ is
Answer» Sum of nodal planes of HOMO of O2+ and N2+ is

Discussion

37.	45 Mixture of carboxylic acid obtained by the oxidation of hexan-3-one does not yield ?? 1. Methanoic acid 2. Ethanoic acid 3. Propanoic acid 4. Butanoic acid
Answer» 45 Mixture of carboxylic acid obtained by the oxidation of hexan-3-one does not yield ?? 1. Methanoic acid 2. Ethanoic acid 3. Propanoic acid 4. Butanoic acid

Discussion

38.	Which would exhibit ionisation isomerism?
Answer» Which would exhibit ionisation isomerism?

Discussion

39.	Total number of chiral carbons present in haworth structure of beta D-(-)-fructosefuranose.
Answer» Total number of chiral carbons present in haworth structure of beta D-(-)-fructosefuranose.

Discussion

40.	Which of the following compounds has the lowest boiling point?
Answer» Which of the following compounds has the lowest boiling point?

Discussion

41.	Brominemonochloride, BrCl decomposes into bromine and chlorine and reachesthe equilibrium:forwhich Kc=32 at 500 K. If initially pure BrCl is present at a concentration of3.3 × 10–3molL–1,what is its molar concentration in the mixture at equilibrium?
Answer» Bromine monochloride, BrCl decomposes into bromine and chlorine and reaches the equilibrium: for which K_c= 32 at 500 K. If initially pure BrCl is present at a concentration of 3.3 × 10^–3 molL^–1, what is its molar concentration in the mixture at equilibrium?

41.

Brominemonochloride, BrCl decomposes into bromine and chlorine and reachesthe equilibrium:forwhich Kc=32 at 500 K. If initially pure BrCl is present at a concentration of3.3 × 10–3molL–1,what is its molar concentration in the mixture at equilibrium?

Answer»

Bromine
monochloride, BrCl decomposes into bromine and chlorine and reaches
the equilibrium:

for
which K_c=
32 at 500 K. If initially pure BrCl is present at a concentration of
3.3 × 10^–3
molL^–1,
what is its molar concentration in the mixture at equilibrium?

Discussion

42.	88.How hydrolysis occurs if water is a very very weak electrolyte?
Answer» 88.How hydrolysis occurs if water is a very very weak electrolyte?

Discussion

43.	a solid contains 5×1021 number of atoms. if an electron is removed from each of 0.01%of number of atoms then the charge gained by this solid is
Answer» a solid contains 5×1021 number of atoms. if an electron is removed from each of 0.01%of number of atoms then the charge gained by this solid is

Discussion

44.	35. Why tetrahedral conplexes form high spin complexes?
Answer» 35. Why tetrahedral conplexes form high spin complexes?

Discussion

45.	Predict which of the following will be coloured in aqueous solution? Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reasons for each.
Answer» Predict which of the following will be coloured in aqueous solution? Ti³⁺, V³⁺, Cu⁺, Sc³⁺, Mn²⁺, Fe³⁺ and Co²⁺. Give reasons for each.

45.

Predict which of the following will be coloured in aqueous solution? Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reasons for each.

Answer»

Predict
which of the following will be coloured in aqueous solution? Ti³⁺,
V³⁺,

Cu⁺,
Sc³⁺,
Mn²⁺,
Fe³⁺
and Co²⁺.
Give reasons for each.

Discussion

46.	Calculate the mass of urea(NH2CONH2) required in making 2.5 kg of 0.25 molal aqueous solution.
Answer» Calculate the mass of urea(NH2CONH2) required in making 2.5 kg of 0.25 molal aqueous solution.

Discussion

47.	equal masses of H2 O2 and CH4 have been taken in a continer of vol v and temp 25^0c in identical condition .the ratio of the volumes of gases H2:O2 :CH4 wouldbe
Answer» equal masses of H2 O2 and CH4 have been taken in a continer of vol v and temp 25^0c in identical condition .the ratio of the volumes of gases H2:O2 :CH4 wouldbe

Discussion

48.	A hypothetical reaction : A(g)+B(g)⇌C(g)+D(g) occurs in a single step, the specific rate constant of forward reaction at TK is 2.0×10−3mol−1L s−1. When start is made with equimolar amounts of A and B, it is found that the concentration of A is twice that of C at equilibrium. The specific rate constant of the backward reaction is ?
Answer» A hypothetical reaction : $A_{(g)} + B_{(g)} ⇌ C_{(g)} + D_{(g)}$ occurs in a single step, the specific rate constant of forward reaction at TK is $2.0 \times 10^{- 3} m o l^{- 1} L s^{- 1}$ . When start is made with equimolar amounts of A and B, it is found that the concentration of A is twice that of C at equilibrium. The specific rate constant of the backward reaction is ?

Discussion

49.	At room temperature the average speed of Helium is higher than that of Oxygen by a factor of
Answer» At room temperature the average speed of Helium is higher than that of Oxygen by a factor of

Discussion

50.	what are leptons and mesons?
Answer» what are leptons and mesons?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following is planar? (1)CH3+ (2)BH4- (3)SO4-2 (4)NF3

Amongst H2O, H2S, H2Se and H2Te, the one with the highest boiling point is -

The fraction of the total volume occupied by the atoms present in a simple cube is

If 'Z' is the number of atoms in the unit cell that represents the closestpacking sequence the number of tetrahedral voids inthe unit cell is equal to[AIIMS 2005]

An electron with de-Broglie wavelength λ fall on the target in an X-rays tube. The cut-off wavelength λ0 of the emitted X-rays is

The reaction of conc. HNO3 with conc. H2SO4 gives:

The major product [B] in the following reactions is

Which is the minimum values of r+/r− needed to prevent anion-anion contact in NaCl crystals?

EDTA always acts as hexadentate ligend. True or false. If false why?

nt2.56g sulphur in 100g CS2 has depression in freezing point of 0.010, Kf=0.1. hence atomicity of sulphur in the solution isn

Among the following oxacids, the correct decreasing order of acidic strength is

20. Why on diluting an electrolyte it's K(specific conductivity) decreases while it's molar conductivity increases?

The vapour density (Hydrogen=1)of a mixture consisting of NO2 and N2O4 is 38.3 at 26.7 degree centigrade. Calculate the number of moles of NO2 in 100 gram of the mixture.

Sum of all the factors of 56 is .

What is the cause for the bleaching action of chlorine?

Column 1: Name and formula of compound Column 2: Name of the reaction. Column 3: Major product of reaction. The only correct combination in which enolate is formed:

Reaction at support 'B' of the structure shown is

The formal charges on Cl in HClO and ClO− ions repectively are:

At 80 oC, the vapour pressure of pure liquid ′A′ is 520 mm Hg and that of pure liquid ′B′ is 1000 mm Hg. If a mixture of ′A′ and ′B′ boils at 80 oC and 1 atm pressure, the amount of ′A′ (in mole percent) in the mixture is:(1 atm=760 mm Hg)

Variable valency is a property of

The geometry of Ni(CO)4 and Ni(PH3)4 Cl2 are

37.A solution of 1.25 gram of a nonelectrolyte in 20 gram of water freezes at 271.94 Kelvin If Kf=1.86 K/ molality then the molecular weight of the solute is 1)207.8 2)179.79 3)209.6 4)96.01

How many cyclic structures are possible for C4H6?

Which of the following statement about C=O and C=C is correct?

What will be the ratio of the wavelength of the first line to that of the second line of Paschen Series of H atom ?

A compound ′X′ having molecular formula C5H8, reacts with ammoniacal AgNO3 to give a white precipitate and reacts with excess of KMnO4 to give the acid, (CH3)2CH−COOH. Therefore, X is:

44.For the reaction pcl5 - pcl3 + com a) delta h = delta e b) del h > del a C) del h < del e

10.6 Arrange each set of compounds in order of increasing boiling points. (i) Bromomethane, Bromoform, Chloromethane, Dibromomethane. { (ii) 1 -Chloropropane, Isopropyl chloride, 1-Chlorobutane.

In which of the following arrangements a metal could have least density?

Why does bromine get attached to CH2 in 4_ethylnitrobenzene when the latter reacts with Br2 in presence of UV light?? Why the attachment to CH3 of ethyl group is not favoured??

Calculate the pH of 0.1 M NH4Cl solution in water :Kb(NH4OH)=1.8×10−5,log1.8=0.25

How to calculate the hybridization of ethane with H=½\lbrack V+M-C+A\rbrack

According to EAN rule, how many CO groups should be attached to Fe?

Question 16Which of the following symbols of elements are incorrect? Give their correct symbols (a) Cobalt CO(b) Carbon c(c) Aluminium AL(d) Helium He(e) Sodium So

Sum of nodal planes of HOMO of O2+ and N2+ is

45 Mixture of carboxylic acid obtained by the oxidation of hexan-3-one does not yield ?? 1. Methanoic acid 2. Ethanoic acid 3. Propanoic acid 4. Butanoic acid

Which would exhibit ionisation isomerism?

Total number of chiral carbons present in haworth structure of beta D-(-)-fructosefuranose.

Which of the following compounds has the lowest boiling point?

Brominemonochloride, BrCl decomposes into bromine and chlorine and reachesthe equilibrium:forwhich Kc=32 at 500 K. If initially pure BrCl is present at a concentration of3.3 × 10–3molL–1,what is its molar concentration in the mixture at equilibrium?

88.How hydrolysis occurs if water is a very very weak electrolyte?

a solid contains 5×1021 number of atoms. if an electron is removed from each of 0.01%of number of atoms then the charge gained by this solid is

35. Why tetrahedral conplexes form high spin complexes?

Predict which of the following will be coloured in aqueous solution? Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reasons for each.

Calculate the mass of urea(NH2CONH2) required in making 2.5 kg of 0.25 molal aqueous solution.

equal masses of H2 O2 and CH4 have been taken in a continer of vol v and temp 25^0c in identical condition .the ratio of the volumes of gases H2:O2 :CH4 wouldbe

At room temperature the average speed of Helium is higher than that of Oxygen by a factor of

what are leptons and mesons?