46295 + Interview Questions in Chemistry

1.	Which of the following pairs are mentioned as ‘contrast’ in the passage?
Answer» Which of the following pairs are mentioned as ‘contrast’ in the passage?

Discussion

2.	Kf (water) =1.86 K kg mol−1. The temperature at which ice begins to separate from a mixture of 10 mass % ethylene glycol is
Answer» $K_{f}$ (water) $= 1.86 K k g m o l^{- 1} .$ The temperature at which ice begins to separate from a mixture of 10 mass % ethylene glycol is

Discussion

3.	The ion that has the highest hydration enthalpy is:
Answer» The ion that has the highest hydration enthalpy is:

Discussion

4.	Complex which does not show d2sp3 hybridisation is:
Answer» Complex which does not show $d^{2} s p^{3}$ hybridisation is:

Discussion

5.	n-propyl benzene +(KMnO4/ KOH)---->P +(H3O+)----> Q
Answer» n-propyl benzene +(KMnO4/ KOH)---->P +(H3O+)----> Q

Discussion

6.	If the radius ratio is between 0.414 - 0.732, what will be the type of void present? What will be the coordination number?
Answer» If the radius ratio is between 0.414 - 0.732, what will be the type of void present? What will be the coordination number?

Discussion

7.	The state of hybridisation of the central atom in the dimer forms of both BH3 and BeH2 is respectively:
Answer» The state of hybridisation of the central atom in the dimer forms of both $B H_{3}$ and $B e H_{2}$ is respectively:

Discussion

8.	What is the general formula for maximum number of electrons can be accomodated in any shell
Answer» What is the general formula for maximum number of electrons can be accomodated in any shell

Discussion

9.	Define the following terms: (i) O/W Emulsion (ii) Zeta potential (iii) Multimolecular colloids
Answer» Define the following terms: (i) O/W Emulsion (ii) Zeta potential (iii) Multimolecular colloids

Discussion

10.	Activation energy for the acid catalysed hydrolysis of sucrose is 6.22 KJ mol−, while the activation energy is only 2.15 KJ mol− when hydrolysis is catalysed by the enzyme sucrase. Explain.
Answer» Activation energy for the acid catalysed hydrolysis of sucrose is 6.22 KJ $m o l^{-}$ , while the activation energy is only 2.15 KJ $m o l^{-}$ when hydrolysis is catalysed by the enzyme sucrase. Explain.

Discussion

11.	What is the number of angular nodes in the second excited state of a hydride ion?
Answer» What is the number of angular nodes in the second excited state of a hydride ion?

Discussion

12.	In which of the following case, central atom and the F-bond has a partial double bond character?
Answer» In which of the following case, central atom and the F-bond has a partial double bond character?

Discussion

13.	Which of the following ions should have highest magnetic moment?
Answer» Which of the following ions should have highest magnetic moment?

Discussion

14.	The ratio of energies of two photons of wavelengths 2000 A∘ and 4000 A∘.
Answer» The ratio of energies of two photons of wavelengths $2000 A^{\circ}$ and $4000 A^{\circ}$ .

Discussion

15.	On a given condition, the equilibrium concentration of HI, H2 and I2 are 0.80, 0.10 and 0.10 mole/litre. The equilibrium constant for the reaction H2 + I2 ⇌ 2HI will be
Answer» On a given condition, the equilibrium concentration of $H I$ , $H_{2}$ and $I_{2}$ are 0.80, 0.10 and 0.10 mole/litre. The equilibrium constant for the reaction $H_{2} + I_{2} ⇌ 2 H I$ will be

15.

On a given condition, the equilibrium concentration of HI, H2 and I2 are 0.80, 0.10 and 0.10 mole/litre. The equilibrium constant for the reaction H2 + I2 ⇌ 2HI will be

Answer»

On a given condition, the equilibrium concentration of $H I$ , $H_{2}$ and $I_{2}$ are

0.80, 0.10 and 0.10 mole/litre. The equilibrium constant for the reaction

$H_{2} + I_{2} ⇌ 2 H I$ will be

Discussion

16.	What is temperature inversion? What are the different types of temperature inversion? What can be the economic implications of temperature inversion?
Answer» What is temperature inversion? What are the different types of temperature inversion? What can be the economic implications of temperature inversion?

Discussion

17.	Which of the following modes of expressing concentration is independent of temperature
Answer» Which of the following modes of expressing concentration is independent of temperature

Discussion

18.	The total number of moles of electrons present in 12.044×1014PO3−4 ions is 10−x. x is
Answer» The total number of moles of electrons present in $12.044 \times 10^{14} P O_{4}^{3 -}$ ions is $10^{- x}$ . x is

Discussion

19.	Which of the following has pπ−dπ bonding?
Answer» Which of the following has $p π - d π$ bonding?

Discussion

20.	Which one of the following compounds shows optical isomerism
Answer» Which one of the following compounds shows optical isomerism

Discussion

21.	Equilibrium constant for the reaction OCI−aq+H2Ol⇌HOCI(aq)+OH−aq is 8.0×10−5; Hence Kafor HOCI is -
Answer» Equilibrium constant for the reaction $O C I_{a q}^{-} + H_{2} O_{l} ⇌ H O C I_{(a q)} + O H_{a q}^{-} i s$ $8.0 \times 10^{- 5}; H e n c e K_{a} f o r H O C I i s$ -

Discussion

22.	Which set is correct about the Hunsdiecker reaction?
Answer» Which set is correct about the Hunsdiecker reaction?

Discussion

23.	In the reaction 3Mg+N2→Mg3N2
Answer» In the reaction $3 M g + N_{2} \to M g_{3} N_{2}$

Discussion

24.	Potassium permanganate on heating gives:
Answer» Potassium permanganate on heating gives:

Discussion

25.	Chloroform on heating with silver powder gives
Answer» Chloroform on heating with silver powder gives

Discussion

26.	The relationship between osmotic pressure at 273K when 10 g glucose (P1),10g urea (P2) and 10g sucrose (P3) are dissolved in 250 ml of water is
Answer» The relationship between osmotic pressure at 273K when 10 g glucose (P₁),10g urea (P₂) and 10g sucrose (P₃) are dissolved in 250 ml of water is

Discussion

27.	How to calculate the number of open chain isomers for propone
Answer» How to calculate the number of open chain isomers for propone

Discussion

28.	Which of the following represents the correct IUPAC name for the compounds concerned? 2, 2-Dimethylpentane or 2-Dimethylpentane 2,4,7- Trimethyloctane or 2,5,7- Trimethyloctance 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane But-3-yn-1-ol or But-4-ol-1-yne
Answer» Which of the following represents the correct IUPAC name for the compounds concerned? 2, 2-Dimethylpentane or 2-Dimethylpentane 2,4,7- Trimethyloctane or 2,5,7- Trimethyloctance 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane But-3-yn-1-ol or But-4-ol-1-yne

28.

Which of the following represents the correct IUPAC name for the compounds concerned? 2, 2-Dimethylpentane or 2-Dimethylpentane 2,4,7- Trimethyloctane or 2,5,7- Trimethyloctance 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane But-3-yn-1-ol or But-4-ol-1-yne

Answer»

Which of the following represents the correct IUPAC name for the compounds concerned?

2, 2-Dimethylpentane or 2-Dimethylpentane

2,4,7- Trimethyloctane or 2,5,7- Trimethyloctance

2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane

But-3-yn-1-ol or But-4-ol-1-yne

Discussion

29.	Which molecule is not linear
Answer» Which molecule is not linear

29.

Which molecule is not linear

Answer»

Which molecule is not linear

Discussion

30.	The correct order of basic strengths for the given compounds is:
Answer» The correct order of basic strengths for the given compounds is:

Discussion

31.	Identify the correct sequence of electron transfer in z -scheme of light reaction
Answer» Identify the correct sequence of electron transfer in z -scheme of light reaction

Discussion

32.	Which of the following molecules process linear shape?
Answer» Which of the following molecules process linear shape?

Discussion

33.	Which of the following is more basic?
Answer» Which of the following is more basic?

Discussion

34.	Which of the following metals has the highest melting point ?
Answer» Which of the following metals has the highest melting point ?

Discussion

35.	Dishwashing soaps are synthetic detergents. What is their chemical nature?
Answer» Dishwashing soaps are synthetic detergents. What is their chemical nature?

Discussion

36.	Sugar is the main source of energy as it produces energy on metabolic decomposition. But these days to calorie drinks are more popular, why?
Answer» Sugar is the main source of energy as it produces energy on metabolic decomposition. But these days to calorie drinks are more popular, why?

Discussion

37.	The spin only magnetic momentum of trivalent titanium cation is
Answer» The spin only magnetic momentum of trivalent titanium cation is

Discussion

38.	Liquids A and B form ideal solution over the entire range of composition. At temperature T, equimolar binary solution of liquids A and B has a vapour pressure of 45 Torr. At the same temperature, a new solution of A and B having mole fractions xA and xB, respectively, has a vapour pressure of 22.5 Torr. The value of xAxB in the new solution is. (given that the vapour pressure of pure liquid A is 20 Torr at temperature T)
Answer» Liquids A and B form ideal solution over the entire range of composition. At temperature T, equimolar binary solution of liquids A and B has a vapour pressure of 45 Torr. At the same temperature, a new solution of A and B having mole fractions $x_{A}$ and $x_{B}$ , respectively, has a vapour pressure of 22.5 Torr. The value of $\frac{x_{A}}{x_{B}}$ in the new solution is. (given that the vapour pressure of pure liquid A is 20 Torr at temperature T)

Discussion

39.	The colour of light absorbed by an aqueous solution of CuSO4 is
Answer» The colour of light absorbed by an aqueous solution of $C u S O_{4}$ is

Discussion

40.	A thermonuclear device consists of a torus of diameter 3 m with a tube of diameter 1 m, containing deuterium molecules gas at 10−2 mm mercury pressure and 293 K. A bank of capacitors of 1200 µF is discharged through the tube at 40 kV. If only 10% of the electrical energy is transformed to plasma kinetic energy, then the maximum temperature attained is (answer the nearest integer)..............×105 K. Assuming that the energy is equally shared between the deutrons and electrons in the plasma.
Answer» A thermonuclear device consists of a torus of diameter $3 m$ with a tube of diameter 1 m, containing deuterium molecules gas at $10^{- 2}$ mm mercury pressure and $293 K$ . A bank of capacitors of 1200 µF is discharged through the tube at $40 kV$ . If only 10% of the electrical energy is transformed to plasma kinetic energy, then the maximum temperature attained is (answer the nearest integer).............. $\times 10^{5} K$ . Assuming that the energy is equally shared between the deutrons and electrons in the plasma.

Discussion

41.	Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which form a protective layer outside it which prevents it from forming associated colloids. Lyophilic colloidal sols also protect lyophobic colloidal sols from precipitation by the action of electrolytes. This is due to the formation of a protective layer by the lyophilic sols outside lyophobic sols. Lyophilic sols are also called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulation on the addition of a solution of sodium chloride. The protective powers of different colloidal sols are measured in terms of gold number. Gold number is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of a 10% solution of sodium chloride. Thus, the smaller the gold number of a lyophilic sol, the greater is the protective power. Gold number of hemoglobin is 0.03. Hence 100 mL of gold sol will require what amount of hemoglobin (in g) so that gold is not coagulated by 1 mL of 10% NaCl solution
Answer» Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which form a protective layer outside it which prevents it from forming associated colloids. Lyophilic colloidal sols also protect lyophobic colloidal sols from precipitation by the action of electrolytes. This is due to the formation of a protective layer by the lyophilic sols outside lyophobic sols. Lyophilic sols are also called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulation on the addition of a solution of sodium chloride. The protective powers of different colloidal sols are measured in terms of gold number. Gold number is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of a $10 %$ solution of sodium chloride. Thus, the smaller the gold number of a lyophilic sol, the greater is the protective power. Gold number of hemoglobin is 0.03. Hence 100 mL of gold sol will require what amount of hemoglobin (in g) so that gold is not coagulated by 1 mL of $10 % N a C l$ solution

Discussion

42.	After the extraction process of gold, the traces of Cyanide can be removed by
Answer» After the extraction process of gold, the traces of Cyanide can be removed by

Discussion

43.	The oxidation state of Mn in Mn2O3 is:
Answer» The oxidation state of Mn in Mn₂O₃ is:

Discussion

44.	Which of the following trend is/are correct?
Answer» Which of the following trend is/are correct?

Discussion

45.	In which of the following crystals are the alternate tetrahedral voids occupied?
Answer» In which of the following crystals are the alternate tetrahedral voids occupied?

Discussion

46.	What is absolute temperature?
Answer» What is absolute temperature?

Discussion

47.	The dimensions of σb4 ( σ=Stefan’s constant and b = Wien’s constant) are:
Answer» The dimensions of $σ b^{4}$ ( σ=Stefan’s constant and b = Wien’s constant) are:

Discussion

48.	Which of the following compound has highest enol content?
Answer» Which of the following compound has highest enol content?

Discussion

49.	Find out number of reagents which can oxidise ethanal. i) I2/NaOH ii) CrO3 iii) Tollens' reagent iv) LiAIH4 v) NaBH4 vi) mCPBA vii) SeO2/Δ viii) NH2−NH2/pH(4−6)
Answer» Find out number of reagents which can oxidise ethanal. $i) I_{2} / N a O H i i) C r O_{3}$ $i i i) Tollens' reagent i v) L i A I H_{4}$ $v) N a B H_{4} v i) mCPBA$ $v i i) S e O_{2} / Δ v i i i) N H_{2} - N H_{2} / p H (4 - 6)$

Discussion

50.	What happens if factors in column A are increased? ABA) Cation sizeI)More CovalentB) Cation chargeII) Less ionicC) Anion SizeIII) More CovalentD) Anion ChargeIV) More ionic
Answer» What happens if factors in column A are increased? $\begin{matrix} A & B A) Cation size & I) More Covalent B) Cation charge & II) Less ionic C) Anion Size & III) More Covalent D) Anion Charge & IV) More ionic \end{matrix}$

50.

What happens if factors in column A are increased? ABA) Cation sizeI)More CovalentB) Cation chargeII) Less ionicC) Anion SizeIII) More CovalentD) Anion ChargeIV) More ionic

Answer»

What happens if factors in column A are increased?

$\begin{matrix} A & B A) Cation size & I) More Covalent B) Cation charge & II) Less ionic C) Anion Size & III) More Covalent D) Anion Charge & IV) More ionic \end{matrix}$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following pairs are mentioned as ‘contrast’ in the passage?

Kf (water) =1.86 K kg mol−1. The temperature at which ice begins to separate from a mixture of 10 mass % ethylene glycol is

The ion that has the highest hydration enthalpy is:

Complex which does not show d2sp3 hybridisation is:

n-propyl benzene +(KMnO4/ KOH)---->P +(H3O+)----> Q

If the radius ratio is between 0.414 - 0.732, what will be the type of void present? What will be the coordination number?

The state of hybridisation of the central atom in the dimer forms of both BH3 and BeH2 is respectively:

What is the general formula for maximum number of electrons can be accomodated in any shell

Define the following terms: (i) O/W Emulsion (ii) Zeta potential (iii) Multimolecular colloids

Activation energy for the acid catalysed hydrolysis of sucrose is 6.22 KJ mol−, while the activation energy is only 2.15 KJ mol− when hydrolysis is catalysed by the enzyme sucrase. Explain.

What is the number of angular nodes in the second excited state of a hydride ion?

In which of the following case, central atom and the F-bond has a partial double bond character?

Which of the following ions should have highest magnetic moment?

The ratio of energies of two photons of wavelengths 2000 A∘ and 4000 A∘.

On a given condition, the equilibrium concentration of HI, H2 and I2 are 0.80, 0.10 and 0.10 mole/litre. The equilibrium constant for the reaction H2 + I2 ⇌ 2HI will be

What is temperature inversion? What are the different types of temperature inversion? What can be the economic implications of temperature inversion?

Which of the following modes of expressing concentration is independent of temperature

The total number of moles of electrons present in 12.044×1014PO3−4 ions is 10−x. x is

Which of the following has pπ−dπ bonding?

Which one of the following compounds shows optical isomerism

Equilibrium constant for the reaction OCI−aq+H2Ol⇌HOCI(aq)+OH−aq is 8.0×10−5; Hence Kafor HOCI is -

Which set is correct about the Hunsdiecker reaction?

In the reaction 3Mg+N2→Mg3N2

Potassium permanganate on heating gives:

Chloroform on heating with silver powder gives

The relationship between osmotic pressure at 273K when 10 g glucose (P1),10g urea (P2) and 10g sucrose (P3) are dissolved in 250 ml of water is

How to calculate the number of open chain isomers for propone

Which of the following represents the correct IUPAC name for the compounds concerned? 2, 2-Dimethylpentane or 2-Dimethylpentane 2,4,7- Trimethyloctane or 2,5,7- Trimethyloctance 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane But-3-yn-1-ol or But-4-ol-1-yne

Which molecule is not linear

The correct order of basic strengths for the given compounds is:

Identify the correct sequence of electron transfer in z -scheme of light reaction

Which of the following molecules process linear shape?

Which of the following is more basic?

Which of the following metals has the highest melting point ?

Dishwashing soaps are synthetic detergents. What is their chemical nature?

Sugar is the main source of energy as it produces energy on metabolic decomposition. But these days to calorie drinks are more popular, why?

The spin only magnetic momentum of trivalent titanium cation is

The colour of light absorbed by an aqueous solution of CuSO4 is

After the extraction process of gold, the traces of Cyanide can be removed by

The oxidation state of Mn in Mn2O3 is:

Which of the following trend is/are correct?

In which of the following crystals are the alternate tetrahedral voids occupied?

What is absolute temperature?

The dimensions of σb4 ( σ=Stefan’s constant and b = Wien’s constant) are:

Which of the following compound has highest enol content?

Find out number of reagents which can oxidise ethanal. i) I2/NaOH ii) CrO3 iii) Tollens' reagent iv) LiAIH4 v) NaBH4 vi) mCPBA vii) SeO2/Δ viii) NH2−NH2/pH(4−6)

What happens if factors in column A are increased? ABA) Cation sizeI)More CovalentB) Cation chargeII) Less ionicC) Anion SizeIII) More CovalentD) Anion ChargeIV) More ionic