46295 + Interview Questions in Chemistry

1.	Which among the following will not show chain isomerism:
Answer» Which among the following will not show chain isomerism:

Discussion

2.	24. What is normal reaction
Answer» 24. What is normal reaction

Discussion

3.	NH3 gas is passed into a water yielding a solution of density 0.93g/cm3 and containing 18.6% nH3 by weight the mass of nH3 per cc of the solution is
Answer» NH3 gas is passed into a water yielding a solution of density 0.93g/cm3 and containing 18.6% nH3 by weight the mass of nH3 per cc of the solution is

Discussion

4.	The acid ionization constant of Zn^(2+) is 2.0 x 10^(-10). What is the basic dissociationconstant of Zn(OH)^(+1)? (a) 5 x 10^(-5) (b) 2.0×10^(4) (c) 2 x 10^(-10) (d) 5 x 10^(9)
Answer» The acid ionization constant of Zn^(2+) is 2.0 x 10^(-10). What is the basic dissociationconstant of Zn(OH)^(+1)? (a) 5 x 10^(-5) (b) 2.0×10^(4) (c) 2 x 10^(-10) (d) 5 x 10^(9)

Discussion

5.	Aqueous solution of FeCl3 is strong acid weak acid strong base weak base
Answer» Aqueous solution of FeCl3 is strong acid weak acid strong base weak base

Discussion

6.	John placed 10 moles of sulphur molecules (S8) and 5 miles of glucose (C6H12O6) in different pans of physical balance. Find which pan of the balance would be heavier?
Answer» John placed 10 moles of sulphur molecules (S8) and 5 miles of glucose (C6H12O6) in different pans of physical balance. Find which pan of the balance would be heavier?

Discussion

7.	What is dancing resonance?
Answer» What is dancing resonance?

Discussion

8.	nitrite,nitrate and bromide all give brown fumes when added H2so4 how to identify which salt is which? please explain
Answer» nitrite,nitrate and bromide all give brown fumes when added H2so4 how to identify which salt is which? please explain

8.

nitrite,nitrate and bromide all give brown fumes when added H2so4 how to identify which salt is which? please explain

Answer»

nitrite,nitrate and bromide all give brown fumes when added H2so4

how to identify which salt is which?

please explain

Discussion

9.	Ratio of nuclear radii of Cs135 to Ca40 is-
Answer» Ratio of nuclear radii of ${Cs}^{135}$ to ${Ca}^{40}$ is-

Discussion

10.	A mineral having a formula AB_2,crystallizes in the cubic close packed lattice,with A atoms occupying the lattice points.Hence coordination number of A and B atoms are?
Answer» A mineral having a formula AB_2,crystallizes in the cubic close packed lattice,with A atoms occupying the lattice points.Hence coordination number of A and B atoms are?

Discussion

11.	What are artificial sweetening agents? Give two examples.
Answer» What are artificial sweetening agents? Give two examples.

Discussion

12.	Molarity of pure D2O will be (assume density of D2O is 1 g mL−1)
Answer» Molarity of pure $D_{2} O$ will be (assume density of $D_{2} O$ is $1 g m L^{- 1}$ )

Discussion

13.	26. For the reactions (i) H2 (g)+Cl2(g)-2HCI(g)+ x kJ (ii) H2 (g)+ Cl2 (g)-2HCI(l)+ y kJ Which one of the following statements is correct? (a)x> (b) x< y (d) x = y (c) x-y=0
Answer» 26. For the reactions (i) H2 (g)+Cl2(g)-2HCI(g)+ x kJ (ii) H2 (g)+ Cl2 (g)-2HCI(l)+ y kJ Which one of the following statements is correct? (a)x> (b) x< y (d) x = y (c) x-y=0

Discussion

14.	Which is greater, the attraction of the earth for 1 kg of brass or attraction of 1 kg brass for the earth? Why?
Answer» Which is greater, the attraction of the earth for 1 kg of brass or attraction of 1 kg brass for the earth? Why?

Discussion

15.	0.1 mole arsenic acid (H3AsO4) is dissolved in a 1L buffer solution of pH=8. Which of the following options is/are correct? For arsenic acid: Ka1=2.5×10−4,Ka2=5×10−8,Ka3=2×10−13.(‘
Answer» $0.1$ mole arsenic acid $(H_{3} A s O_{4})$ is dissolved in a 1L buffer solution of $p H = 8$ . Which of the following options is/are correct? For arsenic acid: $K a_{1} = 2.5 \times 10^{- 4}, K a_{2} = 5 \times 10^{- 8}, K a_{3} = 2 \times 10^{- 13}$ . (‘<<’ sign denotes that the higher concentration is 100 times greater than the lower one or more)

Discussion

16.	Explain with reason. Do acyl chloride undergoes nucleophilic substitution reaction or nucleophilic addition reaction more readily?
Answer» Explain with reason. Do acyl chloride undergoes nucleophilic substitution reaction or nucleophilic addition reaction more readily?

Discussion

17.	If osmotic pressure of solution is 0.82 bar at 27°C temperature then what will be the molarity of the solution?
Answer» If osmotic pressure of solution is 0.82 bar at 27°C temperature then what will be the molarity of the solution?

Discussion

18.	meyhyl bromide is converted into eyhane by heating with Na why not Al zn and cu
Answer» meyhyl bromide is converted into eyhane by heating with Na why not Al zn and cu

Discussion

19.

Ina pseudo first order hydrolysis of ester in water, the followingresults were obtained: t/s 0 30 60 90 [Ester]mol L−1 0.55 0.31 0.17 0.085 (i) Calculatethe average rate of reaction between the time interval 30 to 60seconds.(ii) Calculatethe pseudo first order rate constant for the hydrolysis of ester.

Answer»

In
a pseudo first order hydrolysis of ester in water, the following
results were obtained:

t/s	0	30	60	90
[Ester]mol L⁻¹	0.55	0.31	0.17	0.085

(i) Calculate
the average rate of reaction between the time interval 30 to 60
seconds.

(ii)
Calculate
the pseudo first order rate constant for the hydrolysis of ester.

Discussion

20.	what is mechanical property of fluid
Answer» what is mechanical property of fluid

Discussion

21.	45. CsCl has bcc arrangement. Its unit cell edge length in 400 pm. What will be its inter-ionic distance ?
Answer» 45. CsCl has bcc arrangement. Its unit cell edge length in 400 pm. What will be its inter-ionic distance ?

Discussion

22.	15. A mixture of 3.3gmformic acid and 4.5gm oxalic acid is treated with sulphuric acid . The evolved gaveous mixture is passed through koH pellete . Weight in gm of the remaining product at stp
Answer» 15. A mixture of 3.3gmformic acid and 4.5gm oxalic acid is treated with sulphuric acid . The evolved gaveous mixture is passed through koH pellete . Weight in gm of the remaining product at stp

Discussion

23.	Equivalent conductivity of BaCl2, H2SO4 and HCl are x1,x2,andx3Scm2eq−1at infinite dilution. If conductivity of saturated BaSO4 solution is x Scm−1, then Ksp of BaSO4 is:
Answer» Equivalent conductivity of $B a C l_{2},$ $H_{2} S O_{4}$ and $H C l$ are $x_{1}, x_{2}, a n d x_{3} S c m^{2} e q^{- 1}$ at infinite dilution. If conductivity of saturated $B a S O_{4}$ solution is $x S c m^{- 1}$ , then $K_{s p}$ of $B a S O_{4}$ is:

Discussion

24.	Why in d block element we write first d orbital before s?
Answer» Why in d block element we write first d orbital before s?

Discussion

25.	39. The velocity of a train increases at a constant ratef, from 0 to V, then remains constant for aninterval and finally decreases to zero at theconstant rate f. If x be the total distance describedthen total time taken is
Answer» 39. The velocity of a train increases at a constant rate f, from 0 to V, then remains constant for an interval and finally decreases to zero at the constant rate f. If x be the total distance described then total time taken is

Discussion

26.	....... is the by-product obtained in the Serpeck's process -
Answer» ....... is the by-product obtained in the Serpeck's process -

Discussion

27.	The number of carbon atoms per unit cell of diamond is:
Answer» The number of carbon atoms per unit cell of diamond is:

Discussion

28.	What are vector laws? Explain.
Answer» What are vector laws? Explain.

Discussion

29.	Total number of Bravais Lattices are
Answer» Total number of Bravais Lattices are

Discussion

30.	Addition Reaction of Ethene with Hydrogen"In presence of finely divided platinum or palladium or Raney nickel, the reaction takes place at room temperature. In presence of nickel catalyst, the reaction takes place at 200-300°C."Does this mean : If we use nickel catalyst and we provide a temperature of 200-300°C then the reaction will take place. But if we use finely divided platinum or palladium or Raney nickel, the reaction would take place at room temperature, that is, no extra amount of heat needs to be given. Thus, it is more convenient to use finely divided platinum or palladium or Raney nickel than Nickel+extra heat.But why is Ni generally mentioned to be more convenient?
Answer» Addition Reaction of Ethene with Hydrogen "In presence of finely divided platinum or palladium or Raney nickel, the reaction takes place at room temperature. In presence of nickel catalyst, the reaction takes place at 200-300°C." Does this mean : If we use nickel catalyst and we provide a temperature of 200-300°C then the reaction will take place. But if we use finely divided platinum or palladium or Raney nickel, the reaction would take place at room temperature, that is, no extra amount of heat needs to be given. Thus, it is more convenient to use finely divided platinum or palladium or Raney nickel than Nickel+extra heat. But why is Ni generally mentioned to be more convenient?

Discussion

31.	enyne mechanism in preparation of haloalkane
Answer» enyne mechanism in preparation of haloalkane

Discussion

32.	The time of revolution of an electron, around a nucleus of charge Ze, in nth Bohr orbit is directly proportional to,
Answer» The time of revolution of an electron, around a nucleus of charge $Z e$ , in $n^{t h}$ Bohr orbit is directly proportional to,

Discussion

33.	1 g of a metal combines with 8.89 g of Br.Eq wt of metal is
Answer» 1 g of a metal combines with 8.89 g of Br.Eq wt of metal is

Discussion

34.	Explain the working of a dry cell in short. What are the reactions taking place inside a dry cell?
Answer» Explain the working of a dry cell in short. What are the reactions taking place inside a dry cell?

Discussion

35.	Which of the following arrangements correctly represents the decreasing order of bond angles?
Answer» Which of the following arrangements correctly represents the decreasing order of bond angles?

Discussion

36.	Predict the product 'P' of the given reaction.
Answer» Predict the product 'P' of the given reaction.

Discussion

37.	CH_3COOH,F-CH_3COOH,C_6H_{5-}COOH. WRITE IN INCREASING ORDER OF ACIDIC CHARACTER
Answer» CH_3COOH,F-CH_3COOH,C_6H_{5-}COOH. WRITE IN INCREASING ORDER OF ACIDIC CHARACTER

Discussion

38.	Q 25/30 A dilute solution of a non-volatile solute in water freezes at-0.2^° C. At what temperature (in ^° C) the same solution will boil? (Kffor H20 1.86^° C /m and Kb for H20 0.515 C m )
Answer» Q 25/30 A dilute solution of a non-volatile solute in water freezes at-0.2^° C. At what temperature (in ^° C) the same solution will boil? (Kffor H20 1.86^° C /m and Kb for H20 0.515 C m )

Discussion

39.	Arrange the bonds in order of increasing ionic character LiF,K2O,N2,SO2 and ClF3
Answer» Arrange the bonds in order of increasing ionic character LiF,K2O,N2,SO2 and ClF3

Discussion

40.	Match the following crystal system with their axial angles.
Answer» Match the following crystal system with their axial angles.

Discussion

41.	What is actually Momentum?
Answer» What is actually Momentum?

Discussion

42.	Iupac name (C2H5)4 c
Answer» Iupac name (C2H5)4 c

Discussion

43.	Listen and tick the correct word.1. (a) une glace (b) une chaise2. (a) un cahier (b) un cartable3. (a) une gomme (b) un bonbon4. (a) un père (b) un frère
Answer» Listen and tick the correct word. 1. (a) une glace (b) une chaise 2. (a) un cahier (b) un cartable 3. (a) une gomme (b) un bonbon 4. (a) un père (b) un frère

Discussion

44.	Chlorophyll the green pigment a complex of magnesium contains 2.68 % of magnesium by weight. Calculate the number of magnesium atoms in 5 gram of the chlorophyll. Please explain in detail.
Answer» Chlorophyll the green pigment a complex of magnesium contains 2.68 % of magnesium by weight. Calculate the number of magnesium atoms in 5 gram of the chlorophyll. Please explain in detail.

44.

Chlorophyll the green pigment a complex of magnesium contains 2.68 % of magnesium by weight. Calculate the number of magnesium atoms in 5 gram of the chlorophyll. Please explain in detail.

Answer»

Chlorophyll the green pigment a complex of magnesium contains 2.68 % of magnesium by weight. Calculate the number of magnesium atoms in 5 gram of the chlorophyll.

Please explain in detail.

Discussion

45.	26. A solid is made up of 2 elements X and Y . Atoms x are in fcc arrangement and y atoms occupy all the octahedral sites and atlernate tetrahedral sites . What is the formula of compound ?
Answer» 26. A solid is made up of 2 elements X and Y . Atoms x are in fcc arrangement and y atoms occupy all the octahedral sites and atlernate tetrahedral sites . What is the formula of compound ?

Discussion

46.	How many O-atoms are present in 38 millimoles of [Co(H2O)4Cl2]Cl?
Answer» How many O-atoms are present in $\frac{3}{8}$ millimoles of $[C o (H_{2} O)_{4} C l_{2}] C l$ ?

Discussion

47.	What is maximum covalency of phosphorus ?
Answer» What is maximum covalency of phosphorus ?

Discussion

48.	2. Aryl halide ar inert to nucleophilic substitution why?
Answer» 2. Aryl halide ar inert to nucleophilic substitution why?

Discussion

49.	find the range of f(x)= cos4x+2cos2x+30 in graph .Explain in detailed
Answer» find the range of f(x)= cos4x+2cos2x+30 in graph .Explain in detailed

Discussion

50.	Which of the following statement is correct for the reactivity in SN2 reaction?
Answer» Which of the following statement is correct for the reactivity in $S_{N} 2$ reaction?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which among the following will not show chain isomerism:

24. What is normal reaction

NH3 gas is passed into a water yielding a solution of density 0.93g/cm3 and containing 18.6% nH3 by weight the mass of nH3 per cc of the solution is

The acid ionization constant of Zn^(2+) is 2.0 x 10^(-10). What is the basic dissociationconstant of Zn(OH)^(+1)? (a) 5 x 10^(-5) (b) 2.0×10^(4) (c) 2 x 10^(-10) (d) 5 x 10^(9)

Aqueous solution of FeCl3 is strong acid weak acid strong base weak base

John placed 10 moles of sulphur molecules (S8) and 5 miles of glucose (C6H12O6) in different pans of physical balance. Find which pan of the balance would be heavier?

What is dancing resonance?

nitrite,nitrate and bromide all give brown fumes when added H2so4 how to identify which salt is which? please explain

Ratio of nuclear radii of Cs135 to Ca40 is-

A mineral having a formula AB_2,crystallizes in the cubic close packed lattice,with A atoms occupying the lattice points.Hence coordination number of A and B atoms are?

What are artificial sweetening agents? Give two examples.

Molarity of pure D2O will be (assume density of D2O is 1 g mL−1)

26. For the reactions (i) H2 (g)+Cl2(g)-2HCI(g)+ x kJ (ii) H2 (g)+ Cl2 (g)-2HCI(l)+ y kJ Which one of the following statements is correct? (a)x> (b) x< y (d) x = y (c) x-y=0

Which is greater, the attraction of the earth for 1 kg of brass or attraction of 1 kg brass for the earth? Why?

0.1 mole arsenic acid (H3AsO4) is dissolved in a 1L buffer solution of pH=8. Which of the following options is/are correct? For arsenic acid: Ka1=2.5×10−4,Ka2=5×10−8,Ka3=2×10−13.(‘

Explain with reason. Do acyl chloride undergoes nucleophilic substitution reaction or nucleophilic addition reaction more readily?

If osmotic pressure of solution is 0.82 bar at 27°C temperature then what will be the molarity of the solution?

meyhyl bromide is converted into eyhane by heating with Na why not Al zn and cu

what is mechanical property of fluid

45. CsCl has bcc arrangement. Its unit cell edge length in 400 pm. What will be its inter-ionic distance ?

15. A mixture of 3.3gmformic acid and 4.5gm oxalic acid is treated with sulphuric acid . The evolved gaveous mixture is passed through koH pellete . Weight in gm of the remaining product at stp

Equivalent conductivity of BaCl2, H2SO4 and HCl are x1,x2,andx3Scm2eq−1at infinite dilution. If conductivity of saturated BaSO4 solution is x Scm−1, then Ksp of BaSO4 is:

Why in d block element we write first d orbital before s?

39. The velocity of a train increases at a constant ratef, from 0 to V, then remains constant for aninterval and finally decreases to zero at theconstant rate f. If x be the total distance describedthen total time taken is

....... is the by-product obtained in the Serpeck's process -

The number of carbon atoms per unit cell of diamond is:

What are vector laws? Explain.

Total number of Bravais Lattices are

enyne mechanism in preparation of haloalkane

The time of revolution of an electron, around a nucleus of charge Ze, in nth Bohr orbit is directly proportional to,

1 g of a metal combines with 8.89 g of Br.Eq wt of metal is

Explain the working of a dry cell in short. What are the reactions taking place inside a dry cell?

Which of the following arrangements correctly represents the decreasing order of bond angles?

Predict the product 'P' of the given reaction.

CH_3COOH,F-CH_3COOH,C_6H_{5-}COOH. WRITE IN INCREASING ORDER OF ACIDIC CHARACTER

Q 25/30 A dilute solution of a non-volatile solute in water freezes at-0.2^° C. At what temperature (in ^° C) the same solution will boil? (Kffor H20 1.86^° C /m and Kb for H20 0.515 C m )

Arrange the bonds in order of increasing ionic character LiF,K2O,N2,SO2 and ClF3

Match the following crystal system with their axial angles.

What is actually Momentum?

Iupac name (C2H5)4 c

Listen and tick the correct word.1. (a) une glace (b) une chaise2. (a) un cahier (b) un cartable3. (a) une gomme (b) un bonbon4. (a) un père (b) un frère

Chlorophyll the green pigment a complex of magnesium contains 2.68 % of magnesium by weight. Calculate the number of magnesium atoms in 5 gram of the chlorophyll. Please explain in detail.

26. A solid is made up of 2 elements X and Y . Atoms x are in fcc arrangement and y atoms occupy all the octahedral sites and atlernate tetrahedral sites . What is the formula of compound ?

How many O-atoms are present in 38 millimoles of [Co(H2O)4Cl2]Cl?

What is maximum covalency of phosphorus ?

2. Aryl halide ar inert to nucleophilic substitution why?

find the range of f(x)= cos4x+2cos2x+30 in graph .Explain in detailed

Which of the following statement is correct for the reactivity in SN2 reaction?