46295 + Interview Questions in Chemistry

1.	S(g)+32O2(g)→SO3(g)+2x kcal; SO2(g)+12O2(g)→SO3(g)+y kcal; The heat of formation of SO2 is:
Answer» $S (g) + \frac{3}{2} O_{2} (g) \to S O_{3} (g) + 2 x k c a l;$ $S O_{2} (g) + \frac{1}{2} O_{2} (g) \to S O_{3} (g) + y k c a l;$ The heat of formation of $S O_{2}$ is:

1.

S(g)+32O2(g)→SO3(g)+2x kcal; SO2(g)+12O2(g)→SO3(g)+y kcal; The heat of formation of SO2 is:

Answer»

$S (g) + \frac{3}{2} O_{2} (g) \to S O_{3} (g) + 2 x k c a l;$

$S O_{2} (g) + \frac{1}{2} O_{2} (g) \to S O_{3} (g) + y k c a l;$ The heat of formation of $S O_{2}$ is:

2.	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

3.	equation for an adiabatic process
Answer» equation for an adiabatic process

Discussion

4.	The bond dissociation energy of H - H, C - C, and C - H bonds respectively are 104.2, 83.1 and 98.8 Kcal/ mole. The electro negativity of e is
Answer» The bond dissociation energy of H - H, C - C, and C - H bonds respectively are 104.2, 83.1 and 98.8 Kcal/ mole. The electro negativity of e is

Discussion

5.	Choose the correct order for heat of combustion of the following compounds:
Answer» Choose the correct order for heat of combustion of the following compounds:

Discussion

6.	An example of colloid in which both phase and medium are solid is?
Answer» An example of colloid in which both phase and medium are solid is?

Discussion

7.	Which of the following functions are not continuous.
Answer» Which of the following functions are not continuous.

Discussion

8.	Which method of purification is represented by the following reaction? $Ni+4CO \xrightarrow{330-350 k}Ni(CO)_4 \xrightarrow{450-470K}Ni+4CO$
Answer» Which method of purification is represented by the following reaction? $Ni+4CO \xrightarrow{330-350 k}Ni(CO)_4 \xrightarrow{450-470K}Ni+4CO$

Discussion

9.	Which of the following is outer electronic configuration of Cr and Cu?
Answer» Which of the following is outer electronic configuration of Cr and Cu?

Discussion

10.	What will be the ratio nCr2O2−7nSO2−3 when the following redox reaction Cr2O2−7 (aq)+SO2−3 (aq)→Cr3+ (aq)+SO2−4 (aq) is balanced in an acidic medium. Where n represents the stoichiometric coefficient of the respective species.
Answer» What will be the ratio $\frac{n_{C r_{2} O_{7}^{2 -}}}{n_{S O_{3}^{2 -}}}$ when the following redox reaction $C r_{2} O_{7}^{2 -} (a q) + S O_{3}^{2 -} (a q) \to C r^{3 +} (a q) + S O_{4}^{2 -} (a q)$ is balanced in an acidic medium. Where $n$ represents the stoichiometric coefficient of the respective species.

Discussion

11.	The initial pressure & volume of a given mass of gas having γ=CPCV are P0 and V0. The gas is seperated from the surroundings by a diathermic wall. It is suddenly compressed to V06 and then slowly compressed to V036. Find the final pressure of the gas.
Answer» The initial pressure & volume of a given mass of gas having $γ = \frac{C_{P}}{C_{V}}$ are $P_{0}$ and $V_{0}$ . The gas is seperated from the surroundings by a diathermic wall. It is suddenly compressed to $\frac{V_{0}}{6}$ and then slowly compressed to $\frac{V_{0}}{36}$ . Find the final pressure of the gas.

Discussion

12.	Oxidation number of C in CO2 is:
Answer» Oxidation number of C in CO₂is:

Discussion

13.	Among Al2O3, SiO2, P2O3, and SO3 the correct order of acid strength is
Answer» Among $A l_{2} O_{3}, S i O_{2}, P_{2} O_{3}, a n d S O_{3}$ the correct order of acid strength is

Discussion

14.	Q40. A boy has three library tickets and eight books of his interest in the library. Of these eight, he does not want to borrow Chemistry Part II unless Chemistry Part I is also borrowed. In how many ways can he choose the three books to be borrowed?
Answer» Q40. A boy has three library tickets and eight books of his interest in the library. Of these eight, he does not want to borrow Chemistry Part II unless Chemistry Part I is also borrowed. In how many ways can he choose the three books to be borrowed?

Discussion

15.	The wavelength (in oA) of an emission line obtained for Li2+ during an electronic transition n2=2 and n=1 is (R = Rydberg constant)
Answer» The wavelength (in $o A$ ) of an emission line obtained for $L i^{2 +}$ during an electronic transition $n_{2} = 2$ and $n = 1$ is (R = Rydberg constant)

Discussion

16.	What is the difference between drying and dehydrating agents
Answer» What is the difference between drying and dehydrating agents

Discussion

17.	Match List I with List II:-
Answer» Match List I with List II:-

17.

Match List I with List II:-

Answer»

Match List I with List II:-

Discussion

18.	what will be the pressure exerted by a mixture of 3. 2 grams of CH4 and 4. 4 grams of CO2contained in a flask of volume of (910^-3 m^3)at 27°C ? My solution : PV= nRT Moles in CH4 = 3.2/16=0.2 moles Moles in CO2 = 4.4/44=0.1moles Total moles = 0.3moles P(9*10^-3 m^3) = (0.3 mol)(8.314 pa m^3 K ^-1 mol^-1)(300K) Is it correct ???????
Answer» what will be the pressure exerted by a mixture of 3. 2 grams of CH4 and 4. 4 grams of CO2contained in a flask of volume of (910^-3 m^3)at 27°C ? My solution : PV= nRT Moles in CH4 = 3.2/16=0.2 moles Moles in CO2 = 4.4/44=0.1moles Total moles = 0.3moles P(9*10^-3 m^3) = (0.3 mol)(8.314 pa m^3 K ^-1 mol^-1)(300K) Is it correct ???????

Discussion

19.	On mixing acetone with chloroform, a reduction occurs in total volume. What type of deviations from ideal behaviour for solutions is shown in this case and why?
Answer» On mixing acetone with chloroform, a reduction occurs in total volume. What type of deviations from ideal behaviour for solutions is shown in this case and why?

Discussion

20.	If there is no mention of oxidation and reduction potential in the problem we assume it to be reduction potential. why?
Answer» If there is no mention of oxidation and reduction potential in the problem we assume it to be reduction potential. why?

Discussion

21.	How electrons revolve in covalently bonded molecules?
Answer» How electrons revolve in covalently bonded molecules?

Discussion

22.	What is molality and molarity?
Answer» What is molality and molarity?

Discussion

23.	The number of water molecules present in a drop of water (volume= 0.0018 ml) at room temperature is
Answer» The number of water molecules present in a drop of water (volume= 0.0018 ml) at room temperature is

Discussion

24.	Excess of HCl is reacted with 6.5 g of zinc. The hydrogen liberated is burnt with oxygen. The mass of water formed is (Atomic mass of Zn = 65)
Answer» Excess of $H C l$ is reacted with $6.5 g$ of zinc. The hydrogen liberated is burnt with oxygen. The mass of water formed is (Atomic mass of $Z n$ = 65)

Discussion

25.	Hydrolysis of carbides of Be and Al produces methane.What is the ratio of number of moles of Be2C and Al4C3 required to prepare 1 mole of methane?
Answer» Hydrolysis of carbides of Be and Al produces methane.What is the ratio of number of moles of ${B e}_{2}$ C and ${A l}_{4}$ $C_{3}$ required to prepare 1 mole of methane?

Discussion

26.	One of the following organic compounds cannot decolourise the red-brown colour of bromine water. This compound is : (a) C14H28 (b) C7H12 (c) C6H14 (d) C9H16
Answer» One of the following organic compounds cannot decolourise the red-brown colour of bromine water. This compound is : (a) $C_{14} H_{28}$ (b) $C_{7} H_{12}$ (c) $C_{6} H_{14}$ (d) $C_{9} H_{16}$

26.

One of the following organic compounds cannot decolourise the red-brown colour of bromine water. This compound is : (a) C14H28 (b) C7H12 (c) C6H14 (d) C9H16

Answer»

One of the following organic compounds cannot decolourise the red-brown colour of bromine water. This compound is :

(a) $C_{14} H_{28}$ (b) $C_{7} H_{12}$ (c) $C_{6} H_{14}$ (d) $C_{9} H_{16}$

Discussion

27.	Catalyst only
Answer» Catalyst only

Discussion

28.	Lithium is related diagonally to
Answer» Lithium is related diagonally to

Discussion

29.	An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. The ion is
Answer» An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. The ion is

Discussion

30.	An atom present at the face centre is shared by how many unit cells?
Answer» An atom present at the face centre is shared by how many unit cells?

Discussion

31.	Which of the following compounds will not give Iodoform test?
Answer» Which of the following compounds will not give Iodoform test?

Discussion

32.	Which of the following has largest size
Answer» Which of the following has largest size

32.

Which of the following has largest size

Answer»

Which of the following has largest size

Discussion

33.	Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution? Suggest the reason as well. a) Zn(OH)2 b)Al(OH)3 c)Fe(OH)3 d)Pb(OH)2
Answer» Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution? Suggest the reason as well. a) Zn(OH)₂ b)Al(OH)₃ c)Fe(OH)₃ d)Pb(OH)₂

Discussion

34.	Whish among -phenol and carboxylic acid- is more acidic? Why?
Answer» Whish among -phenol and carboxylic acid- is more acidic? Why?

Discussion

35.	A stop cock connecting two bulbs of having a volume of 5 litre containing an ideal gas at 9 atm and an evacuated container having a volume of 10 litre is opened. What is the final pressure (in atm) in the two bulbs if the temperature remains the same?
Answer» A stop cock connecting two bulbs of having a volume of 5 litre containing an ideal gas at 9 atm and an evacuated container having a volume of 10 litre is opened. What is the final pressure (in atm) in the two bulbs if the temperature remains the same?

Discussion

36.	which of the following will form the cathode with respect to iron anode in an electrolytic cell: a)Mg b)Al c)Cu d)Zn [Doubt: pls explain Concept and reason for answer]
Answer» which of the following will form the cathode with respect to iron anode in an electrolytic cell: a)Mg b)Al c)Cu d)Zn [Doubt: pls explain Concept and reason for answer]

36.

which of the following will form the cathode with respect to iron anode in an electrolytic cell: a)Mg b)Al c)Cu d)Zn [Doubt: pls explain Concept and reason for answer]

Answer»

which of the following will form the cathode with respect to iron anode in an electrolytic cell:

a)Mg

b)Al

c)Cu

d)Zn

[Doubt: pls explain Concept and reason for answer]

Discussion

37.	In the given reaction, B2H6+2KOH+2X→2Y+6H2, X and Y are respectively
Answer» In the given reaction, $B_{2} H_{6} + 2 K O H + 2 X \to 2 Y + 6 H_{2},$ X and Y are respectively

Discussion

38.	[Ni(CN)4]2⊖ and [NiCl4]2⊖ are dissimilar with respect to
Answer» $[N i (C N)_{4}]^{2 ⊖}$ and $[N i C l_{4}]^{2 ⊖}$ are dissimilar with respect to

Discussion

39.	Cs+ ions impart violet colour to Bunsen flame. This is due to the fact that the emitted radiations are of
Answer» Cs⁺ ions impart violet colour to Bunsen flame. This is due to the fact that the emitted radiations are of

Discussion

40.	The reaction of with HBr gives
Answer» The reaction of with HBr gives

Discussion

41.	Calculate the pressure exerted by one mole of CO2 gas at 273 K, if the Van der Waals constant a = 3.592 dm6 atm mol−2. Assume that the volume occupied by CO2 molecules is negligible.
Answer» Calculate the pressure exerted by one mole of CO₂ gas at 273 K, if the Van der Waals constant a = 3.592 dm⁶ atm mol−2. Assume that the volume occupied by CO₂ molecules is negligible.

Discussion

42.	The correct ascending order of bond angles is correctly represented by –
Answer» The correct ascending order of bond angles is correctly represented by –

Discussion

43.	To 50ml of a HCl solution, 25ml of 0.5N Na2CO3 solution is added. The remaining acid required 20cc of 0.5N NaOH solution for complete neutralization. The normality of the acid solution is
Answer» To 50ml of a HCl solution, 25ml of 0.5N $N a_{2} C O_{3}$ solution is added. The remaining acid required 20cc of 0.5N NaOH solution for complete neutralization. The normality of the acid solution is

Discussion

44.	The most volatile compound is
Answer» The most volatile compound is

44.

The most volatile compound is

Answer»

The most volatile compound is

Discussion

45.	Calculate the enthalpy of vaporisation (in kJ/mol) for ethanol. Given, entropy change for the process is 109 J K−1 mol−1 and boiling point of ethanol is 78.5 oC.
Answer» Calculate the enthalpy of vaporisation (in $k J / m o l$ ) for ethanol. Given, entropy change for the process is $109 J K^{- 1} m o l^{- 1}$ and boiling point of ethanol is $78.5^{o} C .$

Discussion

46.	Out of the following compounds, the number of compounds which give a positive haloform test is (a) Ethanol (b) Methanol (c) Acetaldehyde (d) Acetone (e) Formaldehyde (f) Propanaldehyde (g) 3-pentanone (h) 2-pentanone
Answer» Out of the following compounds, the number of compounds which give a positive haloform test is (a) Ethanol (b) Methanol (c) Acetaldehyde (d) Acetone (e) Formaldehyde (f) Propanaldehyde (g) 3-pentanone (h) 2-pentanone

Discussion

47.	X in the above reaction is
Answer» X in the above reaction is

47.

X in the above reaction is

Answer»

X in the above reaction is

Discussion

48.	In an alkaline solution, the following equilibria exist. S2−+S→S2−2equilibrium constant K1 S2−2+S→S2−3 equilibrium constant K2 K1 and K2 have the values 12 and 11, respectively. S2−3→S2−+2S. What is equilibrium constant for the reaction?
Answer» In an alkaline solution, the following equilibria exist. $S^{2 -} + S \to S_{2}^{2 -}$ equilibrium constant $K_{1}$ $S_{2}^{2 -} + S \to S_{3}^{2 -}$ equilibrium constant $K_{2}$ $K_{1}$ and $K_{2}$ have the values 12 and 11, respectively. $S_{3}^{2 -} \to S^{2 -} + 2 S$ . What is equilibrium constant for the reaction?

Discussion

49.	Which of the following description of hybridisation is not correct?
Answer» Which of the following description of hybridisation is not correct?

Discussion

50.	The ionization energy of an element is
Answer» The ionization energy of an element is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

S(g)+32O2(g)→SO3(g)+2x kcal; SO2(g)+12O2(g)→SO3(g)+y kcal; The heat of formation of SO2 is:

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?

equation for an adiabatic process

The bond dissociation energy of H - H, C - C, and C - H bonds respectively are 104.2, 83.1 and 98.8 Kcal/ mole. The electro negativity of e is

Choose the correct order for heat of combustion of the following compounds:

An example of colloid in which both phase and medium are solid is?

Which of the following functions are not continuous.

Which method of purification is represented by the following reaction? \(Ni+4CO \xrightarrow{330-350 k}Ni(CO)_4 \xrightarrow{450-470K}Ni+4CO\)

Which of the following is outer electronic configuration of Cr and Cu?

What will be the ratio nCr2O2−7nSO2−3 when the following redox reaction Cr2O2−7 (aq)+SO2−3 (aq)→Cr3+ (aq)+SO2−4 (aq) is balanced in an acidic medium. Where n represents the stoichiometric coefficient of the respective species.

The initial pressure &amp; volume of a given mass of gas having γ=CPCV are P0 and V0. The gas is seperated from the surroundings by a diathermic wall. It is suddenly compressed to V06 and then slowly compressed to V036. Find the final pressure of the gas.

Oxidation number of C in CO2 is:

Among Al2O3, SiO2, P2O3, and SO3 the correct order of acid strength is

Q40. A boy has three library tickets and eight books of his interest in the library. Of these eight, he does not want to borrow Chemistry Part II unless Chemistry Part I is also borrowed. In how many ways can he choose the three books to be borrowed?

The wavelength (in oA) of an emission line obtained for Li2+ during an electronic transition n2=2 and n=1 is (R = Rydberg constant)

What is the difference between drying and dehydrating agents

Match List I with List II:-

On mixing acetone with chloroform, a reduction occurs in total volume. What type of deviations from ideal behaviour for solutions is shown in this case and why?

If there is no mention of oxidation and reduction potential in the problem we assume it to be reduction potential. why?

How electrons revolve in covalently bonded molecules?

What is molality and molarity?

The number of water molecules present in a drop of water (volume= 0.0018 ml) at room temperature is

Excess of HCl is reacted with 6.5 g of zinc. The hydrogen liberated is burnt with oxygen. The mass of water formed is (Atomic mass of Zn = 65)

Hydrolysis of carbides of Be and Al produces methane.What is the ratio of number of moles of Be2C and Al4C3 required to prepare 1 mole of methane?

One of the following organic compounds cannot decolourise the red-brown colour of bromine water. This compound is : (a) C14H28 (b) C7H12 (c) C6H14 (d) C9H16

Catalyst only

Lithium is related diagonally to

An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. The ion is

An atom present at the face centre is shared by how many unit cells?

Which of the following compounds will not give Iodoform test?

Which of the following has largest size

Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution? Suggest the reason as well. a) Zn(OH)2 b)Al(OH)3 c)Fe(OH)3 d)Pb(OH)2

Whish among -phenol and carboxylic acid- is more acidic? Why?

A stop cock connecting two bulbs of having a volume of 5 litre containing an ideal gas at 9 atm and an evacuated container having a volume of 10 litre is opened. What is the final pressure (in atm) in the two bulbs if the temperature remains the same?

which of the following will form the cathode with respect to iron anode in an electrolytic cell: a)Mg b)Al c)Cu d)Zn [Doubt: pls explain Concept and reason for answer]

In the given reaction, B2H6+2KOH+2X→2Y+6H2, X and Y are respectively

[Ni(CN)4]2⊖ and [NiCl4]2⊖ are dissimilar with respect to

Cs+ ions impart violet colour to Bunsen flame. This is due to the fact that the emitted radiations are of

The reaction of with HBr gives

Calculate the pressure exerted by one mole of CO2 gas at 273 K, if the Van der Waals constant a = 3.592 dm6 atm mol−2. Assume that the volume occupied by CO2 molecules is negligible.

The correct ascending order of bond angles is correctly represented by –

To 50ml of a HCl solution, 25ml of 0.5N Na2CO3 solution is added. The remaining acid required 20cc of 0.5N NaOH solution for complete neutralization. The normality of the acid solution is

The most volatile compound is

Calculate the enthalpy of vaporisation (in kJ/mol) for ethanol. Given, entropy change for the process is 109 J K−1 mol−1 and boiling point of ethanol is 78.5 oC.

Out of the following compounds, the number of compounds which give a positive haloform test is (a) Ethanol (b) Methanol (c) Acetaldehyde (d) Acetone (e) Formaldehyde (f) Propanaldehyde (g) 3-pentanone (h) 2-pentanone

X in the above reaction is

In an alkaline solution, the following equilibria exist. S2−+S→S2−2equilibrium constant K1 S2−2+S→S2−3 equilibrium constant K2 K1 and K2 have the values 12 and 11, respectively. S2−3→S2−+2S. What is equilibrium constant for the reaction?

Which of the following description of hybridisation is not correct?

The ionization energy of an element is

The initial pressure & volume of a given mass of gas having γ=CPCV are P0 and V0. The gas is seperated from the surroundings by a diathermic wall. It is suddenly compressed to V06 and then slowly compressed to V036. Find the final pressure of the gas.