46295 + Interview Questions in Chemistry

1.	(a) Account for the following : (i) Cl−CH2COOH is a stronger acid than CH3COOH. (il) Carboxylic acids do not give reactions of carbonyl group. (b) Write the chemical equations to illustrate the following name reactions : (i) Rosenmund reduction (ii) Cannizzaro's reaction (c) Out of CH3CH2−CO−CH2−CH3 and CH3CH2−CH2−CO−CH3, which gives iodoform test?
Answer» (a) Account for the following : (i) $C l - C H_{2} C O O H$ is a stronger acid than $C H_{3} C O O H$ . (il) Carboxylic acids do not give reactions of carbonyl group. (b) Write the chemical equations to illustrate the following name reactions : (i) Rosenmund reduction (ii) Cannizzaro's reaction (c) Out of $C H_{3} C H_{2} - C O - C H_{2} - C H_{3}$ and $C H_{3} C H_{2} - C H_{2} - C O - C H_{3}$ , which gives iodoform test?

Discussion

2.	Define Brownian movement in colloids.
Answer» Define Brownian movement in colloids.

Discussion

3.	3. Given 1) Cu2+ + 2e- = Cu , E0=0.337V 2) Cu2+ + e- = Cu+ , E0=0.153V electrode potential for the reaction Cu+ + e- = Cu, will be?
Answer» 3. Given 1) Cu2+ + 2e- = Cu , E0=0.337V 2) Cu2+ + e- = Cu+ , E0=0.153V electrode potential for the reaction Cu+ + e- = Cu, will be?

Discussion

4.	When acetaldehyde is reacted with LiAlH4, the product formed is?
Answer» When acetaldehyde is reacted with $L i A l H_{4}$ , the product formed is?

Discussion

5.	equivalent weight of Na_2S_4O_6 in reaction I_2+NaS_2O_3 --->NaI+ Na_2S_4O_6
Answer» equivalent weight of Na_2S_4O_6 in reaction I_2+NaS_2O_3 --->NaI+ Na_2S_4O_6

Discussion

6.	In the formation of CO+ from CO , one electron is removed from 1. pie 2px 2. pie2px3.sigma 2pz4.sigma2s
Answer» In the formation of CO+ from CO , one electron is removed from 1. pie 2px 2. pie2px 3.sigma 2pz 4.sigma2s

Discussion

7.	what is rule of nomenclature of compound having two functional group
Answer» what is rule of nomenclature of compound having two functional group

Discussion

8.	21. What is normality , molality , formality and molarity . What is relation and difference among these concentration terms in terms of formula and defination .
Answer» 21. What is normality , molality , formality and molarity . What is relation and difference among these concentration terms in terms of formula and defination .

Discussion

9.	If Fc and Fa denote cohesive and adhesive forces on a liquid molecule near the surface of a solid , then the surface of liquid will be convex when:a) Fa< Fc/√2 b) Fa=Fc/√2c) Fa>Fc/√2d) Fa>Fc
Answer» If Fc and Fa denote cohesive and adhesive forces on a liquid molecule near the surface of a solid , then the surface of liquid will be convex when: a) Fa< Fc/√2 b) Fa=Fc/√2 c) Fa>Fc/√2 d) Fa>Fc

Discussion

10.	which of the following lanthanoids shows yellow colour yb+3 or ce+4
Answer» which of the following lanthanoids shows yellow colour yb+3 or ce+4

Discussion

11.	A solution is 0.1 M in each KCl, KBr and K2 CrO4 to this solution solid AgNO3 is gradually added. Assume there is no change in the volume of the solution given: Ksp (AgCl) = 1.7×10−10 Ksp (AgBr) = 5.0×10−13 and Ksp (K2CrO4)=1.9×10−12 The concentration of first ion when the second ion starts precipitating is about:
Answer» A solution is 0.1 M in each KCl, KBr and $K _{2} C r O_{4}$ to this solution solid $A g N O_{3}$ is gradually added. Assume there is no change in the volume of the solution given: Ksp (AgCl) = $1.7 \times 10^{- 10}$ Ksp (AgBr) = $5.0 \times 10^{- 13}$ and Ksp $(K_{2} C r O_{4}) = 1.9 \times 10^{- 12}$ The concentration of first ion when the second ion starts precipitating is about:

Discussion

12.	Which of the following solids are also called as super cooled liquids?
Answer» Which of the following solids are also called as super cooled liquids?

Discussion

13.	78 Addition of HCl to 3,3,3-trichloropropene gives
Answer» 78 Addition of HCl to 3,3,3-trichloropropene gives

Discussion

14.	The oxidation state of S in H2S2O8 is
Answer» The oxidation state of $S$ in $H_{2} S_{2} O_{8}$ is

Discussion

15.	Match the following physical quantities with units. Physical quantityUnitA.Molarity1.g mL−1B.Mole fraction2.molC.Mole3.PascalD.Molality4.UnitlessE.Pressure5.mol L−1F.Luminuos intensity6.CandelaG.Density7.mol kg−1H.Mass8.Nm−19.kg
Answer» Match the following physical quantities with units. $Physical quantityUnitA.Molarity1.g mL−1B.Mole fraction2.molC.Mole3.PascalD.Molality4.UnitlessE.Pressure5.mol L−1F.Luminuos intensity6.CandelaG.Density7.mol kg−1H.Mass8.Nm−19.kg$

15.

Match the following physical quantities with units. Physical quantityUnitA.Molarity1.g mL−1B.Mole fraction2.molC.Mole3.PascalD.Molality4.UnitlessE.Pressure5.mol L−1F.Luminuos intensity6.CandelaG.Density7.mol kg−1H.Mass8.Nm−19.kg

Answer»

Match the following physical quantities with units.

$Physical quantityUnitA.Molarity1.g mL−1B.Mole fraction2.molC.Mole3.PascalD.Molality4.UnitlessE.Pressure5.mol L−1F.Luminuos intensity6.CandelaG.Density7.mol kg−1H.Mass8.Nm−19.kg$

Discussion

16.	Select equation having endothermic step
Answer» Select equation having endothermic step

Discussion

17.	1. Calculate the e/m ratio between electron and proton
Answer» 1. Calculate the e/m ratio between electron and proton

Discussion

18.	the difference in angular momentum association the electron in 2 successive orbits of hydrogen atom i
Answer» the difference in angular momentum association the electron in 2 successive orbits of hydrogen atom i

Discussion

19.	why Na is not sublime even when it vanishes when exposed to air
Answer» why Na is not sublime even when it vanishes when exposed to air

Discussion

20.	Carbon monoxide is allowed to expand isothermally and reversibly from 10 m3 to 20 m3 at 300 K and work obtained is 4.754 kJ. Calculate the number of moles of carbon monoxide
Answer» Carbon monoxide is allowed to expand isothermally and reversibly from $10 m^{3} t o 20 m^{3}$ at $300 K$ and work obtained is $4.754 k J$ . Calculate the number of moles of carbon monoxide

Discussion

21.	CH_3CHO + C_2H_5OH \xrightarrow{HCl vapour}?
Answer» CH_3CHO + C_2H_5OH \xrightarrow{HCl vapour}?

Discussion

22.	Cracking is also named as:
Answer» Cracking is also named as:

Discussion

23.	Which structural arrangements has higher Density. 1 BCC2 HCP3 FCC
Answer» Which structural arrangements has higher Density. 1 BCC 2 HCP 3 FCC

Discussion

24.	The species that undergoes disproportionation in an alkaline medium are:
Answer» The species that undergoes disproportionation in an alkaline medium are:

Discussion

25.	What is long division
Answer» What is long division

Discussion

26.	25.Why are higher oxidation states more stable with more electronegative atoms?
Answer» 25.Why are higher oxidation states more stable with more electronegative atoms?

Discussion

27.	Silicones has the general formula:
Answer» Silicones has the general formula:

Discussion

28.	1 mole gas at 522.27 K performs a reversible work by expansion up to 3.99 times of the initial volume. Determine the magnitude work done by gas in kJ. (log 3.99 = 0.6).
Answer» 1 mole gas at 522.27 K performs a reversible work by expansion up to 3.99 times of the initial volume. Determine the magnitude work done by gas in kJ. (log 3.99 = 0.6).

Discussion

29.	The unstable halide among the following is
Answer» The unstable halide among the following is

Discussion

30.	NaClO3 is used, even in spacecrafts, to produce O2. The daily consumption of pure O2 by a person is 492 L at 1 atm, 300 K. How much amount of NaClO3, in grams, is required to produce O2 for the daily consumption of a person at 1 atm, 300 K ? NaClO3(s)+Fe(s)→O2(g)+FeO(s)+NaCl(s) R=0.082L atm mol−1K−1
Answer» $N a C l O_{3}$ is used, even in spacecrafts, to produce $O_{2}$ . The daily consumption of pure $O_{2}$ by a person is 492 L at 1 atm, 300 K. How much amount of $N a C l O_{3}$ , in grams, is required to produce $O_{2}$ for the daily consumption of a person at 1 atm, 300 K ? $N a C l O_{3} (s) + F e (s) \to O_{2} (g) + F e O (s) + N a C l (s)$ $R = 0.082 {L atm mol}^{- 1} K^{- 1}$

Discussion

31.	What is the meaning of universal set?
Answer» What is the meaning of universal set?

Discussion

32.	5. Which of the following will have three stereoisomeric forms :- (i) [Cr(NO3)3(NH3)3] (ii) K3[Co(C2O4)3] (iii) K3[CoCl2(C2O4)2] (iv) [Co BrCl(en)2] (1) iii, iv (2) i, ii and iv (3) Only iv (4) All
Answer» 5. Which of the following will have three stereoisomeric forms :- (i) [Cr(NO3)3(NH3)3] (ii) K3[Co(C2O4)3] (iii) K3[CoCl2(C2O4)2] (iv) [Co BrCl(en)2] (1) iii, iv (2) i, ii and iv (3) Only iv (4) All

Discussion

33.	How to determine the no of standing waves in any shell of H atom.
Answer» How to determine the no of standing waves in any shell of H atom.

Discussion

34.	Length of the hour hand of clock is 10 CM, how much distance will it cover in two days,
Answer» Length of the hour hand of clock is 10 CM, how much distance will it cover in two days,

Discussion

35.	What is hyperconjugation in hydrocarbons?
Answer» What is hyperconjugation in hydrocarbons?

Discussion

36.	5. What is the structure of I3- iodide ion
Answer» 5. What is the structure of I3- iodide ion

Discussion

37.	What is 'A' and 'B' respectively in the following reaction?
Answer» What is 'A' and 'B' respectively in the following reaction?

Discussion

38.	Burst the bubbles that contains a strong acid or a strong base.
Answer» Burst the bubbles that contains a strong acid or a strong base.

Discussion

39.	How to convert Methyl Amine (CH_3NH_2) to Methanol (CH_3OH)
Answer» How to convert Methyl Amine (CH_3NH_2) to Methanol (CH_3OH)

Discussion

40.	The ratio of the radii of the first three Bohr orbits is :
Answer» The ratio of the radii of the first three Bohr orbits is :

Discussion

41.	Consider the following carbocations: I. Cl3C+ II. Cl2CH+ III. ClCH+2 IV. CH+3 The stability sequence follows the order:
Answer» Consider the following carbocations: I. $C l_{3} C^{+}$ II. $C l_{2} C H^{+}$ III. $C l C H_{2}^{+}$ IV. $C H_{3}^{+}$ The stability sequence follows the order:

Discussion

42.	Which is the correct expression of van't Hoff factor for association of electrolyte? Here,n is the number of molecules associate to form n-merβ is the degree of dissociation
Answer» Which is the correct expression of van't Hoff factor for association of electrolyte? Here, n is the number of molecules associate to form n-mer $β$ is the degree of dissociation

Discussion

43.	In the reaction H2+cl2=2HCL. Delta H=-184KJ.if 2 moles of h2 react with 2 moles of cl2 then what is Delta U
Answer» In the reaction H2+cl2=2HCL. Delta H=-184KJ.if 2 moles of h2 react with 2 moles of cl2 then what is Delta U

Discussion

44.	90 min = of an hour(fraction).
Answer» 90 min = of an hour(fraction).

Discussion

45.	Arrange the following bonds according to their average bond energies in descending order:C−Cl,C−Br,C−F,C−I
Answer» Arrange the following bonds according to their average bond energies in descending order: $C - C l, C - B r, C - F, C - I$

Discussion

46.	How to find out stability of carbcation and how to know the number of resonating structure
Answer» How to find out stability of carbcation and how to know the number of resonating structure

Discussion

47.	Given redox reaction : ClO−+CrO−2→Cl−+CrO2−4 When balanced in a basic medium by oxidation number method, the ratio of stoichiometric coefficient of OH− and H2O(nOH−nH2O) will be:
Answer» Given redox reaction : $C l O^{-} + C r O_{2}^{-} \to C l^{-} + C r O_{4}^{2 -}$ When balanced in a basic medium by oxidation number method, the ratio of stoichiometric coefficient of $O H^{-}$ and $H_{2} O (\frac{n_{O H^{-}}}{n_{H_{2} O}})$ will be:

Discussion

48.	65 How to calculate h.o. of C3O2 . Expect.
Answer» 65 How to calculate h.o. of C3O2 . Expect.

Discussion

49.	77 Why bond angle is different in NO+2 and NO-2
Answer» 77 Why bond angle is different in NO+2 and NO-2

Discussion

50.	CH4 and O2 are mixed in 2:3 molar ratio. If mass of CH4 is 530 gram then calculate mole fraction of CH4
Answer» CH4 and O2 are mixed in 2:3 molar ratio. If mass of CH4 is 530 gram then calculate mole fraction of CH4

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Define Brownian movement in colloids.

3. Given 1) Cu2+ + 2e- = Cu , E0=0.337V 2) Cu2+ + e- = Cu+ , E0=0.153V electrode potential for the reaction Cu+ + e- = Cu, will be?

When acetaldehyde is reacted with LiAlH4, the product formed is?

equivalent weight of Na_2S_4O_6 in reaction I_2+NaS_2O_3 --->NaI+ Na_2S_4O_6

In the formation of CO+ from CO , one electron is removed from 1. pie 2px 2. pie*2px3.sigma 2pz4.sigma*2s

what is rule of nomenclature of compound having two functional group

21. What is normality , molality , formality and molarity . What is relation and difference among these concentration terms in terms of formula and defination .

If Fc and Fa denote cohesive and adhesive forces on a liquid molecule near the surface of a solid , then the surface of liquid will be convex when:a) Fa< Fc/√2 b) Fa=Fc/√2c) Fa>Fc/√2d) Fa>Fc

which of the following lanthanoids shows yellow colour yb+3 or ce+4

Which of the following solids are also called as super cooled liquids?

78 Addition of HCl to 3,3,3-trichloropropene gives

The oxidation state of S in H2S2O8 is

Match the following physical quantities with units. Physical quantityUnitA.Molarity1.g mL−1B.Mole fraction2.molC.Mole3.PascalD.Molality4.UnitlessE.Pressure5.mol L−1F.Luminuos intensity6.CandelaG.Density7.mol kg−1H.Mass8.Nm−19.kg

Select equation having endothermic step

1. Calculate the e/m ratio between electron and proton

the difference in angular momentum association the electron in 2 successive orbits of hydrogen atom i

why Na is not sublime even when it vanishes when exposed to air

Carbon monoxide is allowed to expand isothermally and reversibly from 10 m3 to 20 m3 at 300 K and work obtained is 4.754 kJ. Calculate the number of moles of carbon monoxide

CH_3CHO + C_2H_5OH \xrightarrow{HCl vapour}?

Cracking is also named as:

Which structural arrangements has higher Density. 1 BCC2 HCP3 FCC

The species that undergoes disproportionation in an alkaline medium are:

What is long division

25.Why are higher oxidation states more stable with more electronegative atoms?

Silicones has the general formula:

1 mole gas at 522.27 K performs a reversible work by expansion up to 3.99 times of the initial volume. Determine the magnitude work done by gas in kJ. (log 3.99 = 0.6).

The unstable halide among the following is

What is the meaning of universal set?

5. Which of the following will have three stereoisomeric forms :- (i) [Cr(NO3)3(NH3)3] (ii) K3[Co(C2O4)3] (iii) K3[CoCl2(C2O4)2] (iv) [Co BrCl(en)2] (1) iii, iv (2) i, ii and iv (3) Only iv (4) All

How to determine the no of standing waves in any shell of H atom.

Length of the hour hand of clock is 10 CM, how much distance will it cover in two days,

What is hyperconjugation in hydrocarbons?

5. What is the structure of I3- iodide ion

What is 'A' and 'B' respectively in the following reaction?

Burst the bubbles that contains a strong acid or a strong base.

How to convert Methyl Amine (CH_3NH_2) to Methanol (CH_3OH)

The ratio of the radii of the first three Bohr orbits is :

Consider the following carbocations: I. Cl3C+ II. Cl2CH+ III. ClCH+2 IV. CH+3 The stability sequence follows the order:

Which is the correct expression of van't Hoff factor for association of electrolyte? Here,n is the number of molecules associate to form n-merβ is the degree of dissociation

In the reaction H2+cl2=2HCL. Delta H=-184KJ.if 2 moles of h2 react with 2 moles of cl2 then what is Delta U

90 min = of an hour(fraction).

Arrange the following bonds according to their average bond energies in descending order:C−Cl,C−Br,C−F,C−I

How to find out stability of carbcation and how to know the number of resonating structure

Given redox reaction : ClO−+CrO−2→Cl−+CrO2−4 When balanced in a basic medium by oxidation number method, the ratio of stoichiometric coefficient of OH− and H2O(nOH−nH2O) will be:

65 How to calculate h.o. of C3O2 . Expect.

77 Why bond angle is different in NO+2 and NO-2

CH4 and O2 are mixed in 2:3 molar ratio. If mass of CH4 is 530 gram then calculate mole fraction of CH4

In the formation of CO+ from CO , one electron is removed from 1. pie 2px 2. pie2px3.sigma 2pz4.sigma2s