46295 + Interview Questions in Chemistry Page 35 InterviewSolution

1701.	when 1^° alcohol treated with SOBr2 and pyrimidine then inversion of configuration occur but when same is treated with SOBr2 and ether then retention of configuration is observed.why
Answer» when 1^° alcohol treated with SOBr2 and pyrimidine then inversion of configuration occur but when same is treated with SOBr2 and ether then retention of configuration is observed.why

Discussion

1702.	Match the following: CompoundsCoordination(A:B)(1)ZnS(i)8:8(2)CsCl(ii)6:6(3)NaCl(iii)4:4(4)Na2O(iv)8:4(5)CaF2(v)4:8
Answer» Match the following: $\begin{matrix} C o m p o u n d s & C o o r d i n a t i o n (A : B) (1) Z n S & (i) 8 : 8 (2) C s C l & (i i) 6 : 6 (3) N a C l & (i i i) 4 : 4 (4) N a_{2} O & (i v) 8 : 4 (5) C a F_{2} & (v) 4 : 8 \end{matrix}$

1702.

Match the following: CompoundsCoordination(A:B)(1)ZnS(i)8:8(2)CsCl(ii)6:6(3)NaCl(iii)4:4(4)Na2O(iv)8:4(5)CaF2(v)4:8

Answer»

Match the following:

$\begin{matrix} C o m p o u n d s & C o o r d i n a t i o n (A : B) (1) Z n S & (i) 8 : 8 (2) C s C l & (i i) 6 : 6 (3) N a C l & (i i i) 4 : 4 (4) N a_{2} O & (i v) 8 : 4 (5) C a F_{2} & (v) 4 : 8 \end{matrix}$

Discussion

1703.	Why is spontaneous process irreversible
Answer» Why is spontaneous process irreversible

Discussion

1704.	On addition of 1mL of 10% NaCl to 10mL gold Sol in the presence of 0.025 gm of starch,the coagulation is just prevented .What is the gold number of strach?
Answer» On addition of 1mL of 10% NaCl to 10mL gold Sol in the presence of 0.025 gm of starch,the coagulation is just prevented .What is the gold number of strach?

Discussion

1705.	In which of the following species are the bonds non-directional?
Answer» In which of the following species are the bonds non-directional?

Discussion

1706.	the number of all possible products excluding stereoisomer obtained on monochlorination of n-bu†an e and iso-bu†an e are respectively??
Answer» the number of all possible products excluding stereoisomer obtained on monochlorination of n-bu†an e and iso-bu†an e are respectively??

Discussion

1707.	Heat of hydrogenation of ethene and benzene are x1 and x2. What will be the correct expression for resonance energy of Benzene?
Answer» Heat of hydrogenation of ethene and benzene are $x_{1}$ and $x_{2}$ . What will be the correct expression for resonance energy of Benzene?

Discussion

1708.	A gas is present above and below the piston in a cylinder fitted with movable piston having a certain mass. On both sides of the piston there are equal number of moles of gas. The volume above is two times the volume below at a temperature of 300 K. At what temperature will the volume above be four times the volume below?
Answer» A gas is present above and below the piston in a cylinder fitted with movable piston having a certain mass. On both sides of the piston there are equal number of moles of gas. The volume above is two times the volume below at a temperature of $300 K$ . At what temperature will the volume above be four times the volume below?

Discussion

1709.	Find the range of y=x.{x}, x€ [-2, 2] and {.} represents fractional part function.
Answer» Find the range of y=x.{x}, x€ [-2, 2] and {.} represents fractional part function.

Discussion

1710.	What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
Answer» What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?

Discussion

1711.	0.1 molal aqueous solution of an electrolyte AB4 is 75% ionised. The boiling point in K of the solution at 1 atm is : Kb(H2O)=0.52 K kg mol−1. (Report your answer upto two decimal only).
Answer» $0.1 molal$ aqueous solution of an electrolyte $A B_{4}$ is $75 %$ ionised. The boiling point $in K$ of the solution at $1 atm$ is : $K_{b (H_{2} O)} = 0.52 K kg {mol}^{- 1}$ . (Report your answer upto two decimal only).

Discussion

1712.	(a) What type of deviation is shown by a mixture of ethanol and acetone? Give reason. (b) A solution of glucose (molar mass =180 g mol−1) in water is labelled as 10% (by mass). What would be the molality and molarity of the solution? (Density of solution= 1.2 g mL−1)
Answer» (a) What type of deviation is shown by a mixture of ethanol and acetone? Give reason. (b) A solution of glucose (molar mass = $180 g m o l^{- 1}$ ) in water is labelled as 10% (by mass). What would be the molality and molarity of the solution? $(D e n s i t y o f s o l u t i o n = 1.2 g m L^{- 1}$ )

Discussion

1713.	The Ksp of Ag2CrO4 , AgCI, AgBr and Agl are respectively, 1.1x10-12 , 1.8x10-10, 5.0x 10-13 , 8.3x10-17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na2CrO4
Answer» The Ksp of Ag2CrO4 , AgCI, AgBr and Agl are respectively, 1.1x10-12 , 1.8x10-10, 5.0x 10-13 , 8.3x10-17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na2CrO4

Discussion

1714.	The acid strength of active methylene group in given compounds decreases as:a) CH3COCH2COOC2H5b) CH3COCH2COCH3c) C2H5OOCCH2COOC2H5
Answer» The acid strength of active methylene group in given compounds decreases as: a) $C H_{3} C O C H_{2} C O O C_{2} H_{5}$ b) $C H_{3} C O C H_{2} C O C H_{3}$ c) $C_{2} H_{5} O O C C H_{2} C O O C_{2} H_{5}$

Discussion

1715.	How to solve -log5×10^-6
Answer» How to solve -log5×10^-6

Discussion

1716.	calculate the number of moles and number of grams of Na2So4 which contain 1*10^23 sulphate ions
Answer» calculate the number of moles and number of grams of Na2So4 which contain 1*10^23 sulphate ions

Discussion

1717.	A jar contains a gas and a few drops of water. The pressure in the jar is 830 mm of Hg. The temperature of the jar is reduced by 1%. The vapour pressure of water at two temperatures are 30 and 25 mm of Hg. Calculate the new pressure in jar.
Answer» A jar contains a gas and a few drops of water. The pressure in the jar is $830 mm of Hg$ . The temperature of the jar is reduced by $1 %$ . The vapour pressure of water at two temperatures are $30$ and $25 mm of Hg$ . Calculate the new pressure in jar.

Discussion

1718.	Which of the following is/are correctly matched with the reaction?
Answer» Which of the following is/are correctly matched with the reaction?

Discussion

1719.	Catechol +NaOH+CHCl2=?
Answer» Catechol +NaOH+CHCl2=?

Discussion

1720.	Halogenation proceeds via:
Answer» Halogenation proceeds via:

Discussion

1721.	What is meant by haemoglobin saturation? What are the factors it depends upon?
Answer» What is meant by haemoglobin saturation? What are the factors it depends upon?

Discussion

1722.	According to the following figure, the magnitude of the enthalpy change of the reactionA+B→M+N in kJ mol1is equal to . (Integer answer)
Answer» According to the following figure, the magnitude of the enthalpy change of the reaction $A + B \to M + N i n k J {mol}^{1}$ is equal to . (Integer answer)

Discussion

1723.	Which of the following orbitals is represented by n=4 and l=1? 1) 4p_y 2) 4p_x 3) 4d_{xy} 4) 4p_{
Answer» Which of the following orbitals is represented by n=4 and l=1? 1) 4p_y 2) 4p_x 3) 4d_{xy} 4) 4p_{

Discussion

1724.	The nitration of a compound is due to the?
Answer» The nitration of a compound is due to the?

1724.

The nitration of a compound is due to the?

Answer»

The nitration of a compound is due to the?

Discussion

1725.	Arhenius theory could not explain acidic nature of (1)HCL(2)HCOOH (3)H2S (4)CO2
Answer» Arhenius theory could not explain acidic nature of (1)HCL(2)HCOOH (3)H2S (4)CO2

Discussion

1726.	What are the uses of electrolytic decomposition reaction?
Answer» What are the uses of electrolytic decomposition reaction?

Discussion

1727.	(a) Why is bithional added to soap? (b) What is tincture of iodine? Write its one use. (c) Among the following, which one acts as a food preservative? Aspartame, Aspirin, Sodium Benzoate, Paracetamol.
Answer» (a) Why is bithional added to soap? (b) What is tincture of iodine? Write its one use. (c) Among the following, which one acts as a food preservative? Aspartame, Aspirin, Sodium Benzoate, Paracetamol.

Discussion

1728.	{ Rate of diffusion of a saturated hydrocarbon is about }1/6 th of that of hydrogen }} under similar conditions of temperature and pressure. What is the molecular } formula of that hydrocarbon?
Answer» { Rate of diffusion of a saturated hydrocarbon is about }1/6 th of that of hydrogen }} under similar conditions of temperature and pressure. What is the molecular } formula of that hydrocarbon?

Discussion

1729.	(4) Density of agas at 300 K and 210 torr is 0.434 g/lWhat is its molar mass?
Answer» (4) Density of agas at 300 K and 210 torr is 0.434 g/lWhat is its molar mass?

Discussion

1730.	Structure of the unit cells of AB AB
Answer» Structure of the unit cells of AB AB

Discussion

1731.	Do you observe any soil pollution in your neighbourhood? What efforts will you make for controlling the soil pollution?
Answer» Do you observe any soil pollution in your neighbourhood? What efforts will you make for controlling the soil pollution?

Discussion

1732.	Which of the following reactions can be used to prepare above given product ?
Answer» Which of the following reactions can be used to prepare above given product ?

Discussion

1733.	What is immaterial for an electric fuse wire?(a) Its specific resistance(b) Its radius (c) Its length(d) Current flowing through itWhat does immaterial mean in this case?
Answer» What is immaterial for an electric fuse wire? (a) Its specific resistance (b) Its radius (c) Its length (d) Current flowing through it What does immaterial mean in this case?

Discussion

1734.	Glucose Ag2O→ X Glucose Conc.HNO3→ Y X. Y and X respectively are:
Answer» $G l u c o s e A g_{2} O \to X$ $G l u c o s e C o n c . H N O_{3} \to Y$ X. Y and X respectively are:

1734.

Glucose Ag2O→ X Glucose Conc.HNO3→ Y X. Y and X respectively are:

Answer»

$G l u c o s e A g_{2} O \to X$

$G l u c o s e C o n c . H N O_{3} \to Y$

X. Y and X respectively are:

Discussion

1735.	Which among the following walls would allow the flow of thermal energy between systems A and B to achieve thermal equilibrium?
Answer» Which among the following walls would allow the flow of thermal energy between systems A and B to achieve thermal equilibrium?

1735.

Which among the following walls would allow the flow of thermal energy between systems A and B to achieve thermal equilibrium?

Answer»

Which among the following walls would allow the flow of thermal energy between systems A and B to achieve thermal equilibrium?

Discussion

1736.	Question 48In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula C6H12O6. How many grams of water would be required to produce 18 g of glucose? Compute the volume of water so consumed assuming the density of water to be 1 g cm−3
Answer» Question 48 In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula $C_{6} H_{12} O_{6}$ . How many grams of water would be required to produce 18 g of glucose? Compute the volume of water so consumed assuming the density of water to be $1 g c m^{- 3}$

Discussion

1737.	Butan-1-amine structure is shown as:
Answer» Butan-1-amine structure is shown as:

Discussion

1738.	Identify the correct order of acidic strengths of CuO, CO2, CaO and H2O:
Answer» Identify the correct order of acidic strengths of $C u O, C O_{2}, C a O$ and $H_{2} O$ :

Discussion

1739.	More than One Answer Typeएक से अधिक उत्तर प्रकार के प्रश्नLimiting molar conductivity (Λ∘m) of CaCl2 is/are equal toCaCl2 की सीमान्त मोलर चालकता (Λ∘m) है/हैं
Answer» More than One Answer Type एक से अधिक उत्तर प्रकार के प्रश्न Limiting molar conductivity $(Λ_{m}^{^{\circ}})$ of CaCl₂ is/are equal to CaCl₂ की सीमान्त मोलर चालकता $(Λ_{m}^{^{\circ}})$ है/हैं

Discussion

1740.	An LED is constructed from a pn junction based on a certain semi-conducting material whose energy gap is 1.9 eV. Then the wavelength of the emitted light is?
Answer» An LED is constructed from a pn junction based on a certain semi-conducting material whose energy gap is 1.9 eV. Then the wavelength of the emitted light is?

Discussion

1741.	what is the %(by volume) of ozone in an ozonized sample if rate of diffusion of sample is 0.9 times than that of oxygen?
Answer» what is the %(by volume) of ozone in an ozonized sample if rate of diffusion of sample is 0.9 times than that of oxygen?

Discussion

1742.	what is significance of dimension ?
Answer» what is significance of dimension ?

Discussion

1743.	69. among the following the solution which shows the lowest osmotic pressure is 0.010M NaCl, 0.05M CaCl2 , 0.04 M K3 [Fe(CN)6] , 0.03 M FeCl3
Answer» 69. among the following the solution which shows the lowest osmotic pressure is 0.010M NaCl, 0.05M CaCl2 , 0.04 M K3 [Fe(CN)6] , 0.03 M FeCl3

Discussion

1744.	how to find out critical angl
Answer» how to find out critical angl

Discussion

1745.	Explain the hybridisation of [Fe(CO)5] to have dsp3 hybridisation.
Answer» Explain the hybridisation of [Fe(CO)5] to have dsp3 hybridisation.

Discussion

1746.	6.Two isomers solution are ideal or non ideal?
Answer» 6.Two isomers solution are ideal or non ideal?

Discussion

1747.	36. What is the formula to find percent impurity of a substance
Answer» 36. What is the formula to find percent impurity of a substance

Discussion

1748.	Half cell reactions for some electrodes are given belowA +e- --> A+ E⁰=0.96VB- +e- --> B²- E⁰=-0.12VC+ +e- --> C E⁰=+0.18VD²+ +e- --> D E⁰=-1.12VConstruct a cell which can produce largest potential
Answer» Half cell reactions for some electrodes are given below A +e- --> A+ E⁰=0.96V B- +e- --> B²- E⁰=-0.12V C+ +e- --> C E⁰=+0.18V D²+ +e- --> D E⁰=-1.12V Construct a cell which can produce largest potential

Discussion

1749.	cr_{2 }\mbox{\large$o$}\nolimits_7^{2-} molecular mass
Answer» cr_{2 }\mbox{\large$o$}\nolimits_7^{2-} molecular mass

Discussion

1750.	Effective magnetic moment can be calculated by using the formula (n- Number of unpaired electrons)
Answer» Effective magnetic moment can be calculated by using the formula (n- Number of unpaired electrons)

Discussion

Explore topic-wise InterviewSolutions in .

when 1^° alcohol treated with SOBr2 and pyrimidine then inversion of configuration occur but when same is treated with SOBr2 and ether then retention of configuration is observed.why

Match the following: CompoundsCoordination(A:B)(1)ZnS(i)8:8(2)CsCl(ii)6:6(3)NaCl(iii)4:4(4)Na2O(iv)8:4(5)CaF2(v)4:8

Why is spontaneous process irreversible

On addition of 1mL of 10% NaCl to 10mL gold Sol in the presence of 0.025 gm of starch,the coagulation is just prevented .What is the gold number of strach?

In which of the following species are the bonds non-directional?

the number of all possible products excluding stereoisomer obtained on monochlorination of n-bu†an e and iso-bu†an e are respectively??

Heat of hydrogenation of ethene and benzene are x1 and x2. What will be the correct expression for resonance energy of Benzene?

Find the range of y=x.{x}, x€ [-2, 2] and {.} represents fractional part function.

What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?

0.1 molal aqueous solution of an electrolyte AB4 is 75% ionised. The boiling point in K of the solution at 1 atm is : Kb(H2O)=0.52 K kg mol−1. (Report your answer upto two decimal only).

(a) What type of deviation is shown by a mixture of ethanol and acetone? Give reason. (b) A solution of glucose (molar mass =180 g mol−1) in water is labelled as 10% (by mass). What would be the molality and molarity of the solution? (Density of solution= 1.2 g mL−1)

The Ksp of Ag2CrO4 , AgCI, AgBr and Agl are respectively, 1.1x10-12 , 1.8x10-10, 5.0x 10-13 , 8.3x10-17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na2CrO4

The acid strength of active methylene group in given compounds decreases as:a) CH3COCH2COOC2H5b) CH3COCH2COCH3c) C2H5OOCCH2COOC2H5

How to solve -log5×10^-6

calculate the number of moles and number of grams of Na2So4 which contain 1*10^23 sulphate ions

A jar contains a gas and a few drops of water. The pressure in the jar is 830 mm of Hg. The temperature of the jar is reduced by 1%. The vapour pressure of water at two temperatures are 30 and 25 mm of Hg. Calculate the new pressure in jar.

Which of the following is/are correctly matched with the reaction?

Catechol +NaOH+CHCl2=?

Halogenation proceeds via:

What is meant by haemoglobin saturation? What are the factors it depends upon?

According to the following figure, the magnitude of the enthalpy change of the reactionA+B→M+N in kJ mol1is equal to . (Integer answer)

Which of the following orbitals is represented by n=4 and l=1? 1) 4p_y 2) 4p_x 3) 4d_{xy} 4) 4p_{

The nitration of a compound is due to the?

Arhenius theory could not explain acidic nature of (1)HCL(2)HCOOH (3)H2S (4)CO2

What are the uses of electrolytic decomposition reaction?

(a) Why is bithional added to soap? (b) What is tincture of iodine? Write its one use. (c) Among the following, which one acts as a food preservative? Aspartame, Aspirin, Sodium Benzoate, Paracetamol.

{ Rate of diffusion of a saturated hydrocarbon is about }1/6 th of that of hydrogen }} under similar conditions of temperature and pressure. What is the molecular } formula of that hydrocarbon?

(4) Density of agas at 300 K and 210 torr is 0.434 g/lWhat is its molar mass?

Structure of the unit cells of AB AB

Do you observe any soil pollution in your neighbourhood? What efforts will you make for controlling the soil pollution?

Which of the following reactions can be used to prepare above given product ?

What is immaterial for an electric fuse wire?(a) Its specific resistance(b) Its radius (c) Its length(d) Current flowing through itWhat does immaterial mean in this case?

Glucose Ag2O→ X Glucose Conc.HNO3→ Y X. Y and X respectively are:

Which among the following walls would allow the flow of thermal energy between systems A and B to achieve thermal equilibrium?

Butan-1-amine structure is shown as:

Identify the correct order of acidic strengths of CuO, CO2, CaO and H2O:

More than One Answer Typeएक से अधिक उत्तर प्रकार के प्रश्नLimiting molar conductivity (Λ∘m) of CaCl2 is/are equal toCaCl2 की सीमान्त मोलर चालकता (Λ∘m) है/हैं

An LED is constructed from a pn junction based on a certain semi-conducting material whose energy gap is 1.9 eV. Then the wavelength of the emitted light is?

what is the %(by volume) of ozone in an ozonized sample if rate of diffusion of sample is 0.9 times than that of oxygen?

what is significance of dimension ?

69. among the following the solution which shows the lowest osmotic pressure is 0.010M NaCl, 0.05M CaCl2 , 0.04 M K3 [Fe(CN)6] , 0.03 M FeCl3

how to find out critical angl

Explain the hybridisation of [Fe(CO)5] to have dsp3 hybridisation.

6.Two isomers solution are ideal or non ideal?

36. What is the formula to find percent impurity of a substance

Half cell reactions for some electrodes are given belowA +e- --> A+ E⁰=0.96VB- +e- --> B²- E⁰=-0.12VC+ +e- --> C E⁰=+0.18VD²+ +e- --> D E⁰=-1.12VConstruct a cell which can produce largest potential

cr_{2 }\mbox{\large$o$}\nolimits_7^{2-} molecular mass

Effective magnetic moment can be calculated by using the formula (n- Number of unpaired electrons)