46295 + Interview Questions in Chemistry

1.	Dettol is a mixture of:
Answer» Dettol is a mixture of:

Discussion

2.	67. a proton is accelerated through 225V. its de-broglie wavelength is 0.1nm 0.2nm 0.3nm 0.4nm
Answer» 67. a proton is accelerated through 225V. its de-broglie wavelength is 0.1nm 0.2nm 0.3nm 0.4nm

Discussion

3.	Which of the following is used to distinguish primary, secondary and tertiary amines
Answer» Which of the following is used to distinguish primary, secondary and tertiary amines

Discussion

4.	Question 8 Which of the following equation depict the oxidising nature of H2O2? (a)2MnO−4+6H+5H2O2→2Mn2++8H2O+5O2(b)2Fe3++2H+H2O2→2Fe2++2H2O+O2(c)2l−+2H++H2O2→I2+2H2O(d)KIO4+H2O2→KIO3+H2O+O2
Answer» Question 8 Which of the following equation depict the oxidising nature of $H_{2} O_{2}$ ? $(a) 2 M n O_{4}^{-} + 6 H^{+} 5 H_{2} O_{2} \to 2 M n^{2 +} + 8 H_{2} O + 5 O_{2} (b) 2 F e^{3 +} + 2 H^{+} H_{2} O_{2} \to 2 F e^{2 +} + 2 H_{2} O + O_{2} (c) 2 l^{-} + 2 H^{+} + H_{2} O_{2} \to I_{2} + 2 H_{2} O (d) K I O_{4} + H_{2} O_{2} \to K I O_{3} + H_{2} O + O_{2}$

4.

Question 8 Which of the following equation depict the oxidising nature of H2O2? (a)2MnO−4+6H+5H2O2→2Mn2++8H2O+5O2(b)2Fe3++2H+H2O2→2Fe2++2H2O+O2(c)2l−+2H++H2O2→I2+2H2O(d)KIO4+H2O2→KIO3+H2O+O2

Answer»

Question 8

Which of the following equation depict the oxidising nature of $H_{2} O_{2}$ ?

$(a) 2 M n O_{4}^{-} + 6 H^{+} 5 H_{2} O_{2} \to 2 M n^{2 +} + 8 H_{2} O + 5 O_{2} (b) 2 F e^{3 +} + 2 H^{+} H_{2} O_{2} \to 2 F e^{2 +} + 2 H_{2} O + O_{2} (c) 2 l^{-} + 2 H^{+} + H_{2} O_{2} \to I_{2} + 2 H_{2} O (d) K I O_{4} + H_{2} O_{2} \to K I O_{3} + H_{2} O + O_{2}$

Discussion

5.	17. A 10 g mixture of Cu2S and CuS was treated with 200 ml of 0.75 M MnO4 in acid solution producing SO2, Cu22+ and Mn2+. The SO2 was boiled off and the excess MnO4 was titrated with 175 mL of 1 M Fe2+ solution. Calculate the percentage of CuS in the original solution Options: 42.6% 57.4% 27.6% 72.4%
Answer» 17. A 10 g mixture of Cu2S and CuS was treated with 200 ml of 0.75 M MnO4 in acid solution producing SO2, Cu22+ and Mn2+. The SO2 was boiled off and the excess MnO4 was titrated with 175 mL of 1 M Fe2+ solution. Calculate the percentage of CuS in the original solution Options: 42.6% 57.4% 27.6% 72.4%

Discussion

6.	what is motion
Answer» what is motion

Discussion

7.	The decomposition of ozone proceeds as O3⇔O2+O(fast)O+O3→2O2(slow)The rate expression should be
Answer» The decomposition of ozone proceeds as $O_{3} \Leftrightarrow O_{2} + O (f a s t) O + O_{3} \to 2 O_{2} (s l o w)$ The rate expression should be

Discussion

8.	2 ×108 atoms of carbon are arranged side by side. Calculatethe radius of carbon atom if the length of this arrangement is 2.4cm.
Answer» 2 × 10⁸ atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrangement is 2.4 cm.

Discussion

9.	The reaction of cyanamide, NH2CN(s),with dioxygen was carried out in a bomb calorimeter, and ΔU was found to be –742.7 kJ mol–1at 298 K. Calculate enthalpy change for the reaction at 298 K.
Answer» The reaction of cyanamide, NH₂CN_(s),with dioxygen was carried out in a bomb calorimeter, and ΔU was found to be –742.7 kJ mol^–1at 298 K. Calculate enthalpy change for the reaction at 298 K. $N H_{2} C N_{(s)} + \frac{3}{2} O_{2}_{(g)} \to N_{2 (g)} + C O_{2} (g) + H_{2} O_{(l)}$

9.

The reaction of cyanamide, NH2CN(s),with dioxygen was carried out in a bomb calorimeter, and ΔU was found to be –742.7 kJ mol–1at 298 K. Calculate enthalpy change for the reaction at 298 K.

Answer»

The reaction of cyanamide, NH₂CN_(s),with dioxygen was carried out in a bomb calorimeter, and ΔU was found to be –742.7 kJ mol^–1at 298 K. Calculate enthalpy change for the reaction at 298 K.

$N H_{2} C N_{(s)} + \frac{3}{2} O_{2}_{(g)} \to N_{2 (g)} + C O_{2} (g) + H_{2} O_{(l)}$

Discussion

10.	Q.8 A radioactive nuclei , decays by two different processes . the half life of 1st and 2nd processes are 5 years and 2 years respectively . then effective half life is
Answer» Q.8 A radioactive nuclei , decays by two different processes . the half life of 1st and 2nd processes are 5 years and 2 years respectively . then effective half life is

Discussion

11.	2. Which of the following solutions will exactly oxidize 25 ml acidic solution of 0.1 M iron (\|\|) oxalate? (1) 25 ml of 0.1 M KMnO4 (2) 25 ml of 0.2 M KMnO4 (3) 25 ml of 0.6 M KMnO4 (4) 15 ml of 0.1 M KMnO4
Answer» 2. Which of the following solutions will exactly oxidize 25 ml acidic solution of 0.1 M iron (\|\|) oxalate? (1) 25 ml of 0.1 M KMnO4 (2) 25 ml of 0.2 M KMnO4 (3) 25 ml of 0.6 M KMnO4 (4) 15 ml of 0.1 M KMnO4

Discussion

12.	Which of the following is the configuration of noble gas?
Answer» Which of the following is the configuration of noble gas?

Discussion

13.	a sample of ammonium phosphate contains 3.18 moles of hydrogen atoms.what is the no of moles for oxygen atoms in the sample?(how to get a relation between moles of hydrogen and oxygen?)
Answer» a sample of ammonium phosphate contains 3.18 moles of hydrogen atoms.what is the no of moles for oxygen atoms in the sample?(how to get a relation between moles of hydrogen and oxygen?)

Discussion

14.	Four metals and their methods of refinement are given: (i) Ni, Cu, Zr, Ga (ii) Electrolysis, Van-Arkel process, zone refining, Mond's process. Choose the right method for each:
Answer» Four metals and their methods of refinement are given: (i) $N i, C u, Z r, G a$ (ii) Electrolysis, Van-Arkel process, zone refining, Mond's process. Choose the right method for each:

Discussion

15.	A monoatomic ideal gas is given 200J of energy at cons†an t pressure. The increase in internal energy of gas will be
Answer» A monoatomic ideal gas is given 200J of energy at cons†an t pressure. The increase in internal energy of gas will be

Discussion

16.	In a given energy level, the order of penetration effect of different orbitals is
Answer» In a given energy level, the order of penetration effect of different orbitals is

Discussion

17.	in the titration of Na2CO3 by HCl using methyl orange indicator, thevolume required at the equivalence point will be if that of the acidrequired using phenolphthalein indicator is 10.0 ml:
Answer» in the titration of Na2CO3 by HCl using methyl orange indicator, thevolume required at the equivalence point will be if that of the acidrequired using phenolphthalein indicator is 10.0 ml:

Discussion

18.	Identify the following as reversible or irreversible changes, with reasons:i) mixing iron filings and sandii) shattering of glassiii) melting of ice
Answer» Identify the following as reversible or irreversible changes, with reasons: i) mixing iron filings and sand ii) shattering of glass iii) melting of ice

Discussion

19.	The total number of cyclic structural as well as stereo isomers possible for a compound with the molecular formula C5H10 is ___
Answer» The total number of cyclic structural as well as stereo isomers possible for a compound with the molecular formula $C_{5} H_{10}$ is ___

Discussion

20.	Find major product 'B'.
Answer» Find major product 'B'.

Discussion

21.	what is the morality of a solution ? if the ph of a solution of HCL is 4 , then its morality is ?
Answer» what is the morality of a solution ? if the ph of a solution of HCL is 4 , then its morality is ?

Discussion

22.	(a) An X-ray tube produces a continuous spectrum of radiation withits short wavelength end at 0.45 Å. What is the maximum energyof a photon in the radiation? (b) From your answer to (a), guess what order of accelerating voltage(for electrons) is required in such a tube ?
Answer» (a) An X-ray tube produces a continuous spectrum of radiation withits short wavelength end at 0.45 Å. What is the maximum energyof a photon in the radiation? (b) From your answer to (a), guess what order of accelerating voltage(for electrons) is required in such a tube ?

Discussion

23.	t2-20t+64 mathematical equation formul
Answer» t2-20t+64 mathematical equation formul

Discussion

24.	The monomer of the following polymer is:
Answer» The monomer of the following polymer is:

Discussion

25.	46. Balance the following equations: 1. H2O2 + PbS ---> PbSO4 + H2O
Answer» 46. Balance the following equations: 1. H2O2 + PbS ---> PbSO4 + H2O

Discussion

26.	55 calculate w,q and Delta u when 0.75 mole of an ideal gas expands isothermally and reversibly at27C from volume of 15litres to 25 litres
Answer» 55 calculate w,q and Delta u when 0.75 mole of an ideal gas expands isothermally and reversibly at27C from volume of 15litres to 25 litres

Discussion

27.	12 identical capacitors of capacity 1 μF each are arranged along the edges of a cube. The equivalent capacity across the body diagonal is
Answer» 12 identical capacitors of capacity 1 μF each are arranged along the edges of a cube. The equivalent capacity across the body diagonal is

Discussion

28.	How many isomers are possible in \lbrack Cr(en)2Br2\rbrack?
Answer» How many isomers are possible in \lbrack Cr(en)2Br2\rbrack?

Discussion

29.	At 227^oC, the presence of a catalyst lowers the activation energy by 4606 cal. The rate of reaction will be increased by? a. 10 b. 2 c. 100 d. 100
Answer» At 227^oC, the presence of a catalyst lowers the activation energy by 4606 cal. The rate of reaction will be increased by? a. 10 b. 2 c. 100 d. 100

Discussion

30.	if an aqueous solution of Na_2CO_3 ,mole fraction of Na_2CO_3 is 0.2,the molality of the solution is
Answer» if an aqueous solution of Na_2CO_3 ,mole fraction of Na_2CO_3 is 0.2,the molality of the solution is

Discussion

31.	If a bond is directional, does it mean that the constituent atoms in the bond have a specific spatial arrangement?
Answer» If a bond is directional, does it mean that the constituent atoms in the bond have a specific spatial arrangement?

Discussion

32.	Preferred reagent to replace hydroxyl group of alcohol by halogen is
Answer» Preferred reagent to replace hydroxyl group of alcohol by halogen is

Discussion

33.	Fais des phrases selon l'exemple donné. Attention à l'orthographe: majuscule ou minuscule?Exemple: La Champagne, c'est une région; le champagne, c'est un vin de cette région.1. Camembert, c'est .................., le camembert, c'est ....................................2. Cognac, c'est ..........................., le cognac, c'est ...........................................3. Roquefort, c'est ....................., le roquefort, c'est .....................................4. La Bourgogne, c'est ..............., le bourgogne, c'est ....................................5. La Brie, c'est ..........................., le brie, c'est .............................................6. Bordeaux, c'est ......................, le bordeaux, c'est ...................................
Answer» Fais des phrases selon l'exemple donné. Attention à l'orthographe: majuscule ou minuscule? Exemple: La Champagne, c'est une région; le champagne, c'est un vin de cette région. 1. Camembert, c'est .................., le camembert, c'est .................................... 2. Cognac, c'est ..........................., le cognac, c'est ........................................... 3. Roquefort, c'est ....................., le roquefort, c'est ..................................... 4. La Bourgogne, c'est ..............., le bourgogne, c'est .................................... 5. La Brie, c'est ..........................., le brie, c'est ............................................. 6. Bordeaux, c'est ......................, le bordeaux, c'est ...................................

Discussion

34.	7.Molarity of pure D20 (density of D2O is 1gm/ml)
Answer» 7.Molarity of pure D20 (density of D2O is 1gm/ml)

Discussion

35.	If 80% of a radioactive element undergoing decay is left over after a certain period of time t from the start, how many such periods should elapse from the start for the 50% of the element to be left over ?
Answer» If 80% of a radioactive element undergoing decay is left over after a certain period of time t from the start, how many such periods should elapse from the start for the 50% of the element to be left over ?

Discussion

36.	The ratio of orbital angular momentum and spin angular momentum of an electron in p orbital is:
Answer» The ratio of orbital angular momentum and spin angular momentum of an electron in $p$ orbital is:

Discussion

37.	2. Write 2 characteristics associated with the reaction given beloe. Hydrogen and oxygen reacts together to give water.
Answer» 2. Write 2 characteristics associated with the reaction given beloe. Hydrogen and oxygen reacts together to give water.

Discussion

38.

Column-I and Column-II contain four entries each. Entries of Column-I are to be matched with some entries of Column-II. One more than one entries of Column-I may have the matching with the same entries of Column-II.List -IList -I(i) Tetragonal and hexagonal(P)a=b≠c(ii) Cubic and Rhombohedral(Q) α=β=γ(iii) Monoclinic and triclinic(R) a≠b≠c(iv) Orthorhombic(S) a=b=cWhich of the following option has the incorrect combination considering List-I and List-II

Answer»

Column-I and Column-II contain four entries each. Entries of Column-I are to be matched with some entries of Column-II. One more than one entries of Column-I may have the matching with the same entries of Column-II.

List -I	List -I
(i) Tetragonal and hexagonal	(P) $a = b \neq c$
(ii) Cubic and Rhombohedral	(Q) $α = β = γ$
(iii) Monoclinic and triclinic	(R) $a \neq b \neq c$
(iv) Orthorhombic	(S) $a = b = c$

Which of the following option has the incorrect combination considering List-I and List-II

Discussion

39.	Given, E0Cr(3+)/Cr=−0.74V;E0MnO−4/Mn2+=1.51VE0Cr2O2−7/Cr3+=1.33V;E0Cl/Cl−=1.36VBased on the data given above strongest oxidising agent will be
Answer» Given, $E_{C r^{(} 3 +) / C r}^{0} = - 0.74 V; E_{M n O_{4}^{-} / M n^{2 +}}^{0} = 1.51 V$ $E_{C r_{2} O_{7}^{2 -} / C r^{3 +}}^{0} = 1.33 V; E_{C l / C l^{-}}^{0} = 1.36 V$ Based on the data given above strongest oxidising agent will be

Discussion

40.	Why N in (CH3)3N is sp3 hybridised and in (SiH3)3N sp2 hybridised?
Answer» Why N in (CH3)3N is sp3 hybridised and in (SiH3)3N sp2 hybridised?

Discussion

41.	How many faradays are required to reduce one mole of MnO−4 to Mn2+?
Answer» How many faradays are required to reduce one mole of $M n O_{4}^{-}$ to $M n^{2 +}$ ?

Discussion

42.	31 Write the mathematical equation showing the relation between thermodynamic and equilibrium constant of a reaction.
Answer» 31 Write the mathematical equation showing the relation between thermodynamic and equilibrium constant of a reaction.

Discussion

43.	95.The essential condition for feasibility of a reaction is- • the rxn must b exothermic • the Entropy of products must be larger than that of reactants • the reaction is to be accompanied with a decrease in free energy •the rxn has to possess high activation energy
Answer» 95.The essential condition for feasibility of a reaction is- • the rxn must b exothermic • the Entropy of products must be larger than that of reactants • the reaction is to be accompanied with a decrease in free energy •the rxn has to possess high activation energy

Discussion

44.	A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives :
Answer» A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives :

Discussion

45.	Find the oxidation number of sulphur for the given coumpound.
Answer» Find the oxidation number of sulphur for the given coumpound.

Discussion

46.	Which of the following is the correct bond line representation for the given expanded formula?
Answer» Which of the following is the correct bond line representation for the given expanded formula?

Discussion

47.	1 atom of an element weights 1.792×10^{-22}g the atomic weight of element is
Answer» 1 atom of an element weights 1.792×10^{-22}g the atomic weight of element is

Discussion

48.	N2 +3H2 ___2NH3 Cal. Mass of NH3 produced if 210 (power)3 grams of N2 reacts with 110 (power)3 grms of H2 .Name the limiting reagent
Answer» N2 +3H2 ___2NH3 Cal. Mass of NH3 produced if 210 (power)3 grams of N2 reacts with 110 (power)3 grms of H2 .Name the limiting reagent

Discussion

49.	Number of geometrical isomers in M(ab)2cd
Answer» Number of geometrical isomers in M(ab)2cd

Discussion

50.	Name the diseased caused to the sea divers if they carry nitrogen oxygen mixture 0r air
Answer» Name the diseased caused to the sea divers if they carry nitrogen oxygen mixture 0r air

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Dettol is a mixture of:

67. a proton is accelerated through 225V. its de-broglie wavelength is 0.1nm 0.2nm 0.3nm 0.4nm

Which of the following is used to distinguish primary, secondary and tertiary amines

Question 8 Which of the following equation depict the oxidising nature of H2O2? (a)2MnO−4+6H+5H2O2→2Mn2++8H2O+5O2(b)2Fe3++2H+H2O2→2Fe2++2H2O+O2(c)2l−+2H++H2O2→I2+2H2O(d)KIO4+H2O2→KIO3+H2O+O2

what is motion

The decomposition of ozone proceeds as O3⇔O2+O(fast)O+O3→2O2(slow)The rate expression should be

2 ×108 atoms of carbon are arranged side by side. Calculatethe radius of carbon atom if the length of this arrangement is 2.4cm.

The reaction of cyanamide, NH2CN(s),with dioxygen was carried out in a bomb calorimeter, and ΔU was found to be –742.7 kJ mol–1at 298 K. Calculate enthalpy change for the reaction at 298 K.

Q.8 A radioactive nuclei , decays by two different processes . the half life of 1st and 2nd processes are 5 years and 2 years respectively . then effective half life is

2. Which of the following solutions will exactly oxidize 25 ml acidic solution of 0.1 M iron (||) oxalate? (1) 25 ml of 0.1 M KMnO4 (2) 25 ml of 0.2 M KMnO4 (3) 25 ml of 0.6 M KMnO4 (4) 15 ml of 0.1 M KMnO4

Which of the following is the configuration of noble gas?

a sample of ammonium phosphate contains 3.18 moles of hydrogen atoms.what is the no of moles for oxygen atoms in the sample?(how to get a relation between moles of hydrogen and oxygen?)

Four metals and their methods of refinement are given: (i) Ni, Cu, Zr, Ga (ii) Electrolysis, Van-Arkel process, zone refining, Mond's process. Choose the right method for each:

A monoatomic ideal gas is given 200J of energy at cons†an t pressure. The increase in internal energy of gas will be

In a given energy level, the order of penetration effect of different orbitals is

in the titration of Na2CO3 by HCl using methyl orange indicator, thevolume required at the equivalence point will be if that of the acidrequired using phenolphthalein indicator is 10.0 ml:

Identify the following as reversible or irreversible changes, with reasons:i) mixing iron filings and sandii) shattering of glassiii) melting of ice

The total number of cyclic structural as well as stereo isomers possible for a compound with the molecular formula C5H10 is ___

Find major product 'B'.

what is the morality of a solution ? if the ph of a solution of HCL is 4 , then its morality is ?

(a) An X-ray tube produces a continuous spectrum of radiation withits short wavelength end at 0.45 Å. What is the maximum energyof a photon in the radiation? (b) From your answer to (a), guess what order of accelerating voltage(for electrons) is required in such a tube ?

t2-20t+64 mathematical equation formul

The monomer of the following polymer is:

46. Balance the following equations: 1. H2O2 + PbS ---> PbSO4 + H2O

55 calculate w,q and Delta u when 0.75 mole of an ideal gas expands isothermally and reversibly at27C from volume of 15litres to 25 litres

12 identical capacitors of capacity 1 μF each are arranged along the edges of a cube. The equivalent capacity across the body diagonal is

How many isomers are possible in \lbrack Cr(en)2Br2\rbrack?

At 227^oC, the presence of a catalyst lowers the activation energy by 4606 cal. The rate of reaction will be increased by? a. 10 b. 2 c. 100 d. 100

if an aqueous solution of Na_2CO_3 ,mole fraction of Na_2CO_3 is 0.2,the molality of the solution is

If a bond is directional, does it mean that the constituent atoms in the bond have a specific spatial arrangement?

Preferred reagent to replace hydroxyl group of alcohol by halogen is

7.Molarity of pure D20 (density of D2O is 1gm/ml)

If 80% of a radioactive element undergoing decay is left over after a certain period of time t from the start, how many such periods should elapse from the start for the 50% of the element to be left over ?

The ratio of orbital angular momentum and spin angular momentum of an electron in p orbital is:

2. Write 2 characteristics associated with the reaction given beloe. Hydrogen and oxygen reacts together to give water.

Given, E0Cr(3+)/Cr=−0.74V;E0MnO−4/Mn2+=1.51VE0Cr2O2−7/Cr3+=1.33V;E0Cl/Cl−=1.36VBased on the data given above strongest oxidising agent will be

Why N in (CH3)3N is sp3 hybridised and in (SiH3)3N sp2 hybridised?

How many faradays are required to reduce one mole of MnO−4 to Mn2+?

31 Write the mathematical equation showing the relation between thermodynamic and equilibrium constant of a reaction.

95.The essential condition for feasibility of a reaction is- • the rxn must b exothermic • the Entropy of products must be larger than that of reactants • the reaction is to be accompanied with a decrease in free energy •the rxn has to possess high activation energy

A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives :

Find the oxidation number of sulphur for the given coumpound.

Which of the following is the correct bond line representation for the given expanded formula?

1 atom of an element weights 1.792×10^{-22}g the atomic weight of element is

N2 +3H2 ___2NH3 Cal. Mass of NH3 produced if 210 (power)3 grams of N2 reacts with 110 (power)3 grms of H2 .Name the limiting reagent

Number of geometrical isomers in M(ab)2cd

Name the diseased caused to the sea divers if they carry nitrogen oxygen mixture 0r air