46295 + Interview Questions in Chemistry

1.	The following condition is satisfied by two different gases A and B: T(A)M(B)=T(B)M(A). where M(A) and M(B) represent molar masses of A and B respectively and M(A) is not equal to M(B). T(A) and T(B) are temperatures of A and B and are not equal. The property which can never have the same magnitude for A and B is:(i) rms velocity (ii) most probable velocity (iii) density (iv) KE per mole
Answer» The following condition is satisfied by two different gases A and B: T(A)M(B)=T(B)M(A). where M(A) and M(B) represent molar masses of A and B respectively and M(A) is not equal to M(B). T(A) and T(B) are temperatures of A and B and are not equal. The property which can never have the same magnitude for A and B is: (i) rms velocity (ii) most probable velocity (iii) density (iv) KE per mole

Discussion

2.	31. List of monovalent ions and bivalent ions
Answer» 31. List of monovalent ions and bivalent ions

Discussion

3.	Total number of cyclic isomers possible for the compound with formula C_3H_6O is (1) 1 (2) 2 (3) 3 (4)
Answer» Total number of cyclic isomers possible for the compound with formula C_3H_6O is (1) 1 (2) 2 (3) 3 (4)

Discussion

4.	Ethanol is used in the preparation of:
Answer» Ethanol is used in the preparation of:

Discussion

5.	z effective of sc(z=21).
Answer» z effective of sc(z=21).

Discussion

6.	Product E can be:
Answer» Product E can be:

Discussion

7.	1) Do cathode rays originate from cathode itself?2)Do anode rays originate from anode itself
Answer» 1) Do cathode rays originate from cathode itself? 2)Do anode rays originate from anode itself

Discussion

8.	The dissociation energy of methane is 360 kilo calorie per mole and that of ethane is 620 kilo joule per mole the c-c bond energy is
Answer» The dissociation energy of methane is 360 kilo calorie per mole and that of ethane is 620 kilo joule per mole the c-c bond energy is

Discussion

9.	The standard change in Gibbs energy for the reaction: H2O⇌H++OH− at 25∘C
Answer» The standard change in Gibbs energy for the reaction: $H_{2} O ⇌ H^{+} + O H^{-}$ at $25^{\circ} C$

Discussion

10.	The activation energy for a simple chemical reaction, A→B is Ea in forward direction. The activation energy for reverse reaction. [CBSE AIPMT 2003]
Answer» The activation energy for a simple chemical reaction, $A \to B$ is $E_{a}$ in forward direction. The activation energy for reverse reaction. [CBSE AIPMT 2003]

Discussion

11.	What kind of molecular structure does slime has?
Answer» What kind of molecular structure does slime has?

Discussion

12.	Benzene and toluene form an ideal solution. Vapour Pressure of pure benzene is 100 torr while that of pure toluene is 50 torr. If mole fraction of benzene in liquid phase is 13, calculate the mole fraction of benzene in vapour phase.
Answer» Benzene and toluene form an ideal solution. Vapour Pressure of pure benzene is 100 torr while that of pure toluene is 50 torr. If mole fraction of benzene in liquid phase is $\frac{1}{3}$ , calculate the mole fraction of benzene in vapour phase.

Discussion

13.	Which element will have the lower oxidation state being the most stable?
Answer» Which element will have the lower oxidation state being the most stable?

Discussion

14.	Point out the angular momentum of an electron in 3p orbital
Answer» Point out the angular momentum of an electron in $3 p$ orbital

Discussion

15.	Calculate the maximum and minimum number of electrons which may have magnetic quantum number m=−1 and spin quantum number s=−12 in Manganese (Mn)
Answer» Calculate the maximum and minimum number of electrons which may have magnetic quantum number $m = - 1$ and spin quantum number $s = - \frac{1}{2}$ in Manganese $(M n)$

Discussion

16.	Which series of reactions will achieve the following transformation?
Answer» Which series of reactions will achieve the following transformation?

Discussion

17.	Which two chemical reactions are used in black and white photography
Answer» Which two chemical reactions are used in black and white photography

Discussion

18.	Find the concentration of HCO_3^-,in a 0.01Msolution of carbonuc acid if pH of this solution is 4.18.Ka_1 for H2CO3=4.45x10^-
Answer» Find the concentration of HCO_3^-,in a 0.01Msolution of carbonuc acid if pH of this solution is 4.18.Ka_1 for H2CO3=4.45x10^-

Discussion

19.	Which of the following factors don't affect the process of electrolysis?Type in the appropriate number here. ___ Concentration of the electrolyte Galvanometer Size of the electrode Nature of the metal used Current Voltage
Answer» Which of the following factors don't affect the process of electrolysis? Type in the appropriate number here. ___ Concentration of the electrolyte Galvanometer Size of the electrode Nature of the metal used Current Voltage

Discussion

20.	which of the following metal ion has highest formation constant of complex having nitrogen donor ligand?1)Cu2+2)Co2+3)Mn2+4)Ni2+
Answer» which of the following metal ion has highest formation constant of complex having nitrogen donor ligand? 1)Cu2+ 2)Co2+ 3)Mn2+ 4)Ni2+

Discussion

21.	The dimensions of alpha /. Beta in the equation F=alpha-T^2/beta× velocity^2 wherebF is the force, velocity is v and t is time , is
Answer» The dimensions of alpha /. Beta in the equation F=alpha-T^2/beta× velocity^2 wherebF is the force, velocity is v and t is time , is

Discussion

22.	0.54 g of organic compound give 1.5 g of Mg2P2O4. The percentage of P is
Answer» 0.54 g of organic compound give 1.5 g of Mg2P2O4. The percentage of P is

Discussion

23.	A gas cylinder containing cooking gas can withstand a pressure 15 atmosphere. The pressure guage of the cylinder indicates 12 atmosphere at 27 ∘C. Due to a sudden fire in the building, the temperature starts rising. Find the temperature (in Kelvin) when the cylinder explodes?
Answer» A gas cylinder containing cooking gas can withstand a pressure $15$ atmosphere. The pressure guage of the cylinder indicates $12$ atmosphere at $27^{\circ} C$ . Due to a sudden fire in the building, the temperature starts rising. Find the temperature (in Kelvin) when the cylinder explodes?

Discussion

24.	5 ml of N HCl, 20 ml of N/2 H2SO4 and 30 ml of N/3 HNO3 are mixed together and volume made to one litre. The normality of the resulting solution is
Answer» 5 ml of N HCl, 20 ml of $N / 2 H_{2} S O_{4}$ and 30 ml of $N / 3 H N O_{3}$ are mixed together and volume made to one litre. The normality of the resulting solution is

Discussion

25.	The standard heats of formation of CCl4 (g), H2O (g), CO2 (g) and HCl (g) at 298K are−25.5,−57.8,−94.1 and−22.1 kcal mol−1 respectively. ΔH0 (298K) for the reaction CCl4 (g)+2H2O (g)→CO2 (g)+4HCl (g)
Answer» The standard heats of formation of $C C l_{4} (g), H_{2} O (g), C O_{2} (g) a n d H C l (g) a t 298 K a r e - 25.5, - 57.8, - 94.1 a n d - 22.1 k c a l m o l^{- 1} r e s p e c t i v e l y . Δ H^{0} (298 K) f o r t h e r e a c t i o n$ $C C l_{4} (g) + 2 H_{2} O (g) \to C O_{2} (g) + 4 H C l (g)$

Discussion

26.	In dilute aqueous H2SO4, the complex diaquodioxalatoferrate (II) is oxidized by MnO−4. For this reaction, the ratio of the rate of change of [H+] to the rate of change of [MnO−4] is
Answer» In dilute aqueous $H_{2} S O_{4}$ , the complex diaquodioxalatoferrate (II) is oxidized by $M n O_{4}^{-}$ . For this reaction, the ratio of the rate of change of $[H^{+}]$ to the rate of change of $[M n O_{4}^{-}]$ is

Discussion

27.	27. The volume (in mL) of 0.1 M AgNO3 required for complex precipitation of chloride ions present in 30 mL of 0.01 M solution of [Cr(H2O)5Cl]Cl2, as silver chloride is close to
Answer» 27. The volume (in mL) of 0.1 M AgNO3 required for complex precipitation of chloride ions present in 30 mL of 0.01 M solution of [Cr(H2O)5Cl]Cl2, as silver chloride is close to

Discussion

28.	At 500 Kbar pressure density of diamond and graphite 3 gm/cc and 2gm/cc respectively at a certain temperature T .{delta H-deltaU} in KJ/ mole for the conversion of one mole of graphite to one mole of diamond at 500 Kbar pressure is 10X .The value of X is ? [given 1 bar =105N/m2] ans =2 how ?
Answer» At 500 Kbar pressure density of diamond and graphite 3 gm/cc and 2gm/cc respectively at a certain temperature T .{delta H-deltaU} in KJ/ mole for the conversion of one mole of graphite to one mole of diamond at 500 Kbar pressure is 10^X .The value of X is ? [given 1 bar =10⁵N/m²] ans =2 how ?

28.

At 500 Kbar pressure density of diamond and graphite 3 gm/cc and 2gm/cc respectively at a certain temperature T .{delta H-deltaU} in KJ/ mole for the conversion of one mole of graphite to one mole of diamond at 500 Kbar pressure is 10X .The value of X is ? [given 1 bar =105N/m2] ans =2 how ?

Answer»

At 500 Kbar pressure density of diamond and graphite 3 gm/cc and 2gm/cc respectively at a certain temperature T .{delta H-deltaU} in KJ/ mole for the conversion of one mole of graphite to one mole of diamond at 500 Kbar pressure is 10^X .The value of X is ?

[given 1 bar =10⁵N/m²]

ans =2 how ?

Discussion

29.	about ray diagrams
Answer» about ray diagrams

Discussion

30.	Which is the poorest reducing agent?
Answer» Which is the poorest reducing agent?

Discussion

31.	Which H-bond is stronger? (I) F - H - - - - FH or (II) F - H - - - - O
Answer» Which H-bond is stronger? (I) F - H - - - - FH or (II) F - H - - - - O

Discussion

32.	Match the coordination compounds given in column Iw9.the central metal atoms given in column II and assign thcorrect code:Column IIColumn I(i) Chlorophyll(ii) Blood pigment(iii) Wilkinson catalyst(iv) Vitamin B,(p) Titanium(q) Cobalt(r) Iron(s) Magnesium(iv)(ii)(ii)(i)(a) (p)(b) (s)(q)(q)(r)(s)(r)(r)(p)(c) (s)(p)(q)(d) (q)(r)(s)(p)
Answer» Match the coordination compounds given in column Iw9.the central metal atoms given in column II and assign thcorrect code:Column IIColumn I(i) Chlorophyll(ii) Blood pigment(iii) Wilkinson catalyst(iv) Vitamin B,(p) Titanium(q) Cobalt(r) Iron(s) Magnesium(iv)(ii)(ii)(i)(a) (p)(b) (s)(q)(q)(r)(s)(r)(r)(p)(c) (s)(p)(q)(d) (q)(r)(s)(p)

Discussion

33.	what is pascal low?
Answer» what is pascal low?

Discussion

34.	Consider the following reaction sequence:12.CaCO3(s)+ 2HCI(aq)CaCl2(aq) + CO2(g) + H20heatCaO(s) + H20(g).CaCO3(s)If the percentage yield of the 1st step is 80% andthat of the 2nd step is 75%, then what is theexpected overall percentage yield for producingCaO from CaCl2?(1) 50%(2) 70%(3) 55%(4) 60%
Answer» Consider the following reaction sequence:12.CaCO3(s)+ 2HCI(aq)CaCl2(aq) + CO2(g) + H20heatCaO(s) + H20(g).CaCO3(s)If the percentage yield of the 1st step is 80% andthat of the 2nd step is 75%, then what is theexpected overall percentage yield for producingCaO from CaCl2?(1) 50%(2) 70%(3) 55%(4) 60%

Discussion

35.	How many mole of electrons is equivalent to 1 kg ?
Answer» How many mole of electrons is equivalent to 1 kg ?

Discussion

36.	The rate of decomposition for methyl nitrite and ethylnitrite can be given in terms of rate constant k1 and k2 respectively. The energy of activation for the two reactions are 152.30 kJ mol–1 and 157.7 kJ mol–1 as well as frequency factors are 1013 and 1014 respectively for the decomposition of methyl and ethylnitrite. Calculate the temperature at which rate constant will be same for the two reactions.
Answer» The rate of decomposition for methyl nitrite and ethylnitrite can be given in terms of rate constant $k_{1}$ and $k_{2}$ respectively. The energy of activation for the two reactions are $152.30 {kJ mol}^{- 1}$ and $157.7 {kJ mol}^{- 1}$ as well as frequency factors are $10^{13}$ and $10^{14}$ respectively for the decomposition of methyl and ethylnitrite. Calculate the temperature at which rate constant will be same for the two reactions.

Discussion

37.	The rms speeds of the molecules of hydrogen, Oxygen and carbon dioxide, at the same temperature are, VH,VO and VC respectively then,
Answer» The rms speeds of the molecules of hydrogen, Oxygen and carbon dioxide, at the same temperature are, $V_{H}, V_{O} and V_{C}$ respectively then,

Discussion

38.	Write balanced equations for reactions between(a) Na2O2andwater(b) KO2and water(c) Na2Oand CO2
Answer» Write balanced equations for reactions between (a) Na₂O₂and water (b) KO₂ and water (c) Na₂O and CO₂

38.

Write balanced equations for reactions between(a) Na2O2andwater(b) KO2and water(c) Na2Oand CO2

Answer»

Write balanced equations for reactions between

(a) Na₂O₂and
water

(b) KO₂
and water

(c) Na₂O
and CO₂

Discussion

39.	34.100ml of 0.2 M hcl react with sodium hydroxide solutions completely .the mass of naoh reacted is
Answer» 34.100ml of 0.2 M hcl react with sodium hydroxide solutions completely .the mass of naoh reacted is

Discussion

40.	Which is most basic?1. Benzyl amine2.o-methyl aniline
Answer» Which is most basic? 1. Benzyl amine 2.o-methyl aniline

Discussion

41.	A solution when diluted with water and boiled, it gives a white precipitate. On addition of excess NH4Cl/NH4OH, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which dissolves in NH4Cl/NH4OH
Answer» A solution when diluted with water and boiled, it gives a white precipitate. On addition of excess $N H_{4} C l / N H_{4} O H$ , the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which dissolves in $N H_{4} C l / N H_{4} O H$

Discussion

42.	11.2 litre of a gas at STP weighs 14 g. The gas could not be:
Answer» 11.2 litre of a gas at STP weighs 14 g. The gas could not be:

Discussion

43.	Ca(OH)2+CO2⟶CaCO3+H2O percentage yield = 30% If 200 mL of N10 Ca(OH)2 is mixed with 2.2 g of CO2, then the number of moles of CaCO3 produced will be:
Answer» $C a (O H)_{2} + C O_{2} ⟶ C a C O_{3} + H_{2} O percentage yield = 30%$ If 200 mL of $\frac{N}{10}$ $C a (O H)_{2}$ is mixed with 2.2 g of $C O_{2}$ , then the number of moles of $C a C O_{3}$ produced will be:

Discussion

44.	Sequence in Krebs cycle is
Answer» Sequence in Krebs cycle is

Discussion

45.	67. A bottle of aqueous hydrogen peroxide solution is labelled as '28V' , and the density of the solution (in g/ml) is 1.25.What is the molality of the hydrogen peroxide solution?
Answer» 67. A bottle of aqueous hydrogen peroxide solution is labelled as '28V' , and the density of the solution (in g/ml) is 1.25.What is the molality of the hydrogen peroxide solution?

Discussion

46.	relationship between activation energy and temperature
Answer» relationship between activation energy and temperature

Discussion

47.	Cr(scn)2(nh3)4] why does it show optical isomerism?
Answer» Cr(scn)2(nh3)4] why does it show optical isomerism?

Discussion

48.	Metals X,Y,Z are in simple cubic,face centered cubic,body centered cubic unit cells respectively.Find correct order of metalic radii if volume of each unit cell is same
Answer» Metals X,Y,Z are in simple cubic,face centered cubic,body centered cubic unit cells respectively.Find correct order of metalic radii if volume of each unit cell is same

Discussion

49.	The conversion of ortho hydrogen to para hydrogen is a difficult process (taking into account the extensive cooling).What is the real use of para hydrogen ? What is the need of isolating them if they have exactly same chemical properties?
Answer» The conversion of ortho hydrogen to para hydrogen is a difficult process (taking into account the extensive cooling).What is the real use of para hydrogen ? What is the need of isolating them if they have exactly same chemical properties?

Discussion

50.	A and B atoms crystallize in cubic lattice. A atoms are present at the corners while B atoms are at face centers. What would be the simplest formula of the compound if two of the A atoms are missing from each unit cell?
Answer» A and B atoms crystallize in cubic lattice. A atoms are present at the corners while B atoms are at face centers. What would be the simplest formula of the compound if two of the A atoms are missing from each unit cell?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

31. List of monovalent ions and bivalent ions

Total number of cyclic isomers possible for the compound with formula C_3H_6O is (1) 1 (2) 2 (3) 3 (4)

Ethanol is used in the preparation of:

z effective of sc(z=21).

Product E can be:

1) Do cathode rays originate from cathode itself?2)Do anode rays originate from anode itself

The dissociation energy of methane is 360 kilo calorie per mole and that of ethane is 620 kilo joule per mole the c-c bond energy is

The standard change in Gibbs energy for the reaction: H2O⇌H++OH− at 25∘C

The activation energy for a simple chemical reaction, A→B is Ea in forward direction. The activation energy for reverse reaction. [CBSE AIPMT 2003]

What kind of molecular structure does slime has?

Benzene and toluene form an ideal solution. Vapour Pressure of pure benzene is 100 torr while that of pure toluene is 50 torr. If mole fraction of benzene in liquid phase is 13, calculate the mole fraction of benzene in vapour phase.

Which element will have the lower oxidation state being the most stable?

Point out the angular momentum of an electron in 3p orbital

Calculate the maximum and minimum number of electrons which may have magnetic quantum number m=−1 and spin quantum number s=−12 in Manganese (Mn)

Which series of reactions will achieve the following transformation?

Which two chemical reactions are used in black and white photography

Find the concentration of HCO_3^-,in a 0.01Msolution of carbonuc acid if pH of this solution is 4.18.Ka_1 for H2CO3=4.45x10^-

Which of the following factors don't affect the process of electrolysis?Type in the appropriate number here. ___ Concentration of the electrolyte Galvanometer Size of the electrode Nature of the metal used Current Voltage

which of the following metal ion has highest formation constant of complex having nitrogen donor ligand?1)Cu2+2)Co2+3)Mn2+4)Ni2+

The dimensions of alpha /. Beta in the equation F=alpha-T^2/beta× velocity^2 wherebF is the force, velocity is v and t is time , is

0.54 g of organic compound give 1.5 g of Mg2P2O4. The percentage of P is

A gas cylinder containing cooking gas can withstand a pressure 15 atmosphere. The pressure guage of the cylinder indicates 12 atmosphere at 27 ∘C. Due to a sudden fire in the building, the temperature starts rising. Find the temperature (in Kelvin) when the cylinder explodes?

5 ml of N HCl, 20 ml of N/2 H2SO4 and 30 ml of N/3 HNO3 are mixed together and volume made to one litre. The normality of the resulting solution is

The standard heats of formation of CCl4 (g), H2O (g), CO2 (g) and HCl (g) at 298K are−25.5,−57.8,−94.1 and−22.1 kcal mol−1 respectively. ΔH0 (298K) for the reaction CCl4 (g)+2H2O (g)→CO2 (g)+4HCl (g)

In dilute aqueous H2SO4, the complex diaquodioxalatoferrate (II) is oxidized by MnO−4. For this reaction, the ratio of the rate of change of [H+] to the rate of change of [MnO−4] is

27. The volume (in mL) of 0.1 M AgNO3 required for complex precipitation of chloride ions present in 30 mL of 0.01 M solution of [Cr(H2O)5Cl]Cl2, as silver chloride is close to

At 500 Kbar pressure density of diamond and graphite 3 gm/cc and 2gm/cc respectively at a certain temperature T .{delta H-deltaU} in KJ/ mole for the conversion of one mole of graphite to one mole of diamond at 500 Kbar pressure is 10X .The value of X is ? [given 1 bar =105N/m2] ans =2 how ?

about ray diagrams

Which is the poorest reducing agent?

Which H-bond is stronger? (I) F - H - - - - FH or (II) F - H - - - - O

what is pascal low?

Consider the following reaction sequence:12.CaCO3(s)+ 2HCI(aq)CaCl2(aq) + CO2(g) + H20heatCaO(s) + H20(g).CaCO3(s)If the percentage yield of the 1st step is 80% andthat of the 2nd step is 75%, then what is theexpected overall percentage yield for producingCaO from CaCl2?(1) 50%(2) 70%(3) 55%(4) 60%

How many mole of electrons is equivalent to 1 kg ?

The rms speeds of the molecules of hydrogen, Oxygen and carbon dioxide, at the same temperature are, VH,VO and VC respectively then,

Write balanced equations for reactions between(a) Na2O2andwater(b) KO2and water(c) Na2Oand CO2

34.100ml of 0.2 M hcl react with sodium hydroxide solutions completely .the mass of naoh reacted is

Which is most basic?1. Benzyl amine2.o-methyl aniline

A solution when diluted with water and boiled, it gives a white precipitate. On addition of excess NH4Cl/NH4OH, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which dissolves in NH4Cl/NH4OH

11.2 litre of a gas at STP weighs 14 g. The gas could not be:

Ca(OH)2+CO2⟶CaCO3+H2O percentage yield = 30% If 200 mL of N10 Ca(OH)2 is mixed with 2.2 g of CO2, then the number of moles of CaCO3 produced will be:

Sequence in Krebs cycle is

67. A bottle of aqueous hydrogen peroxide solution is labelled as '28V' , and the density of the solution (in g/ml) is 1.25.What is the molality of the hydrogen peroxide solution?

relationship between activation energy and temperature

Cr(scn)2(nh3)4] why does it show optical isomerism?

Metals X,Y,Z are in simple cubic,face centered cubic,body centered cubic unit cells respectively.Find correct order of metalic radii if volume of each unit cell is same

The conversion of ortho hydrogen to para hydrogen is a difficult process (taking into account the extensive cooling).What is the real use of para hydrogen ? What is the need of isolating them if they have exactly same chemical properties?

A and B atoms crystallize in cubic lattice. A atoms are present at the corners while B atoms are at face centers. What would be the simplest formula of the compound if two of the A atoms are missing from each unit cell?