46295 + Interview Questions in Chemistry

1.	The standard oxidation potentials Eo, for the half cell reactions are given asZn→Zn2++2e−, E∘=+0.76 VFe→Fe2++2e−, E∘=+0.41 VThe EMF for the cell reaction,Fe2++Zn→Zn2++Fe is:
Answer» The standard oxidation potentials $E^{o}$ , for the half cell reactions are given as $Z n \to Z n^{2 +} + 2 e^{-}, E^{\circ} = + 0.76 V F e \to F e^{2 +} + 2 e^{-}, E^{\circ} = + 0.41 V$ The EMF for the cell reaction, $F e^{2 +} + Z n \to Z n^{2 +} + F e$ is:

Discussion

2.	f(x)=x^2+2x+4 find range of the function
Answer» f(x)=x^2+2x+4 find range of the function

Discussion

3.	What will happen if two different alkyl halides are taken in wurtz reaction?
Answer» What will happen if two different alkyl halides are taken in wurtz reaction?

Discussion

4.	30. select incorrect among the following (1) levelling effect of water indicate mineral acids appear to be equally strong due to its complete ionisation (2)order of acidic strength in ch3cOOh solvent is HNO3
Answer» 30. select incorrect among the following (1) levelling effect of water indicate mineral acids appear to be equally strong due to its complete ionisation (2)order of acidic strength in ch3cOOh solvent is HNO3

Discussion

5.	how many atoms of phosphorus are present in 0.1 mole of P4 molecules?
Answer» how many atoms of phosphorus are present in 0.1 mole of P4 molecules?

Discussion

6.	Which among the following is most acidic?
Answer» Which among the following is most acidic?

Discussion

7.	Classify the following reactions in one of the reaction type studied in this unit. (a) CH3CH2Br+HS–→CH3CH2SH+Br– (b) (CH3)2C=CH2+HCl→(CH3)2ClC–CH3 (c) CH3CH2Br+HO–→CH2=CH2+H2O+Br– (d) (CH3)3C–CH2OH+HBr→(CH3)2CBrCH2CH3+H2O
Answer» Classify the following reactions in one of the reaction type studied in this unit. (a) $C H_{3} C H_{2} B r + H S^{-} \to C H_{3} C H_{2} S H + B r^{-}$ (b) $(C H_{3})_{2} C = C H_{2} + H C l \to (C H_{3})_{2} C l C - C H_{3}$ (c) $C H_{3} C H_{2} B r + H O^{-} \to C H_{2} = C H_{2} + H_{2} O + B r^{-}$ (d) $(C H_{3})_{3} C - C H_{2} O H + H B r \to (C H_{3})_{2} C B r C H_{2} C H_{3} + H_{2} O$

Discussion

8.	22. A proton and an alpha particle accelerated through some potential difference in ratio 2:1. The ratio of de broglie wavelength associated with proton to that of alpha particle is
Answer» 22. A proton and an alpha particle accelerated through some potential difference in ratio 2:1. The ratio of de broglie wavelength associated with proton to that of alpha particle is

Discussion

9.	The △ S for the reaction: 2H2 +O2 =2H2O at 300k when SH2=126.6, SO2=201.20, SH2O=68.0JKmol respectively
Answer» The △ S for the reaction: 2H2 +O2 =2H2O at 300k when SH2=126.6, SO2=201.20, SH2O=68.0JKmol respectively

Discussion

10.	Compressibility factor for CO2 at 400 K and 71.0 bar is 0.8697. Molar volume of CO2 under these conditions is:
Answer» Compressibility factor for $C O_{2}$ at $400 K$ and $71.0 bar$ is $0.8697$ . Molar volume of $C O_{2}$ under these conditions is:

Discussion

11.	The alkene which gives 4,4-dimethylpentan-2-one on reductive ozonolysis is
Answer» The alkene which gives 4,4-dimethylpentan-2-one on reductive ozonolysis is

Discussion

12.	is azulene aromatic ,non aromatic, antiaromaticWhy ?It contains both aromatic and anti aromatic Ring
Answer» is azulene aromatic ,non aromatic, antiaromatic Why ? It contains both aromatic and anti aromatic Ring

Discussion

13.	Select the most stable carbocation among the following?
Answer» Select the most stable carbocation among the following?

Discussion

14.	{ 14. }3 -Phenyl propene on reaction with HBr gives }} (as a major product) }{ (1) }C_6H_5CH_2CH(Br)CH_3}{ (2) }C_6H_5CH_2CH(Br)CH_2CH_3}{ (3) }C_6H_5CH_2CH_2CH_2Br}{ (4) }C_6H_5CH(Br)CH=CH_2
Answer» { 14. }3 -Phenyl propene on reaction with HBr gives }} (as a major product) }{ (1) }C_6H_5CH_2CH(Br)CH_3}{ (2) }C_6H_5CH_2CH(Br)CH_2CH_3}{ (3) }C_6H_5CH_2CH_2CH_2Br}{ (4) }C_6H_5CH(Br)CH=CH_2

Discussion

15.	Explain how an electric cell helps a bulb glow.
Answer» Explain how an electric cell helps a bulb glow.

Discussion

16.	In Cr2O2−7
Answer» In $C r_{2} O_{7}^{2 -}$

Discussion

17.	The compressibility factor for an ideal gas is?
Answer» The compressibility factor for an ideal gas is?

Discussion

18.	In a compound of hydrocarbon ,carbon contains 81.81%and 18.18%hydrogen .calculate molecular formula of compound?
Answer» In a compound of hydrocarbon ,carbon contains 81.81%and 18.18%hydrogen .calculate molecular formula of compound?

Discussion

19.	Light is required for the light dependent reactions because
Answer» Light is required for the light dependent reactions because

Discussion

20.	what is degree of association?
Answer» what is degree of association?

Discussion

21.	The amount of electricity required to deposit 0.9gof aluminum the electrode reaction isAl3++3e−→Al(atomic mass of Al = 27)
Answer» The amount of electricity required to deposit 0.9gof aluminum the electrode reaction is $A l^{3 +} + 3 e^{-} \to A l$ (atomic mass of Al = 27)

Discussion

22.	Define fractional distillation.
Answer» Define fractional distillation.

Discussion

23.	The heat of combustion of sucrose (C12H22O11) is −5.65×103 kJ. If complete combustion of 1.0 kg sucrose is done, heat evloved will be:
Answer» The heat of combustion of sucrose $(C_{12} H_{22} O_{11})$ is $- 5.65 \times 10^{3} k J$ . If complete combustion of $1.0 k g$ sucrose is done, heat evloved will be:

Discussion

24.	Do all non polar molecules have linear shape? For instance, BeF2 where mue = 0? And polar molecules always possess shapes such that the mue will be always greater than p? Ex- H2O
Answer» Do all non polar molecules have linear shape? For instance, BeF2 where mue = 0? And polar molecules always possess shapes such that the mue will be always greater than p? Ex- H2O

Discussion

25.	Calculate the wavelength associated with an electron moving with a velocity of 109 cm/s.
Answer» Calculate the wavelength associated with an electron moving with a velocity of $10^{9} c m / s .$

Discussion

26.	Which of the following acts as a reducing agent?
Answer» Which of the following acts as a reducing agent?

Discussion

27.	what is the relation between de broglie wavelentgh and temperature?
Answer» what is the relation between de broglie wavelentgh and temperature ?

Discussion

28.	If 0.5 mole of BaCl2 is mixed with 0.2 mole of Na3PO4, the maximum number of moles of Ba3(PO4)2 formed are
Answer» If $0.5 m o l e$ of $B a C l_{2}$ is mixed with $0.2 m o l e$ of $N a_{3} P O_{4}$ , the maximum number of moles of $B a_{3} (P O_{4})_{2}$ formed are

Discussion

29.	What will be the volume of CO2 at STP (atm) obtained on heating 10 grams of 90% pure limestone?
Answer» What will be the volume of $C O_{2}$ at STP (atm) obtained on heating 10 grams of 90% pure limestone?

Discussion

30.	It is easier to start a car engine on a warm day than on a chilly day .why?
Answer» It is easier to start a car engine on a warm day than on a chilly day .why?

Discussion

31.	What is the molality of pure liquid benzene if it's density=1.2g/ml
Answer» What is the molality of pure liquid benzene if it's density=1.2g/ml

Discussion

32.	What is the molarity of OH– in the final solution prepared by mixing 20.0 mL of 0.10 M H2SO4 with 30.0 mL of 0.10 M Ba(OH)2?
Answer» What is the molarity of $O H^{-}$ in the final solution prepared by mixing 20.0 mL of $0.10 M$ $H_{2} S O_{4}$ with 30.0 mL of $0.10 M$ $B a (O H)_{2}$ ?

Discussion

33.	Which of the following pairs of d- orbitals will have electron density along the axes?
Answer» Which of the following pairs of $d$ - orbitals will have electron density along the axes?

Discussion

34.	Match the thermodynamic processes given under Column I with the expressions given under Column II. Column IColumn II(A) Freezing of water at 273 K and 1 atm(P) q=0(B) Expansion of 1 mol of an ideal gas into a(Q) w=0vacuum under isolated conditions(C) Mixing of equal volumes of two ideal gases at(R) ΔSsys<0constant temperature and pressure in anisolated container(D) Reversible heating of H2(g) at 1 atm from(S) ΔU=0300 K to 600 K, followed by reversible coolingto 300 K at 1 atm(T) ΔG=0
Answer» Match the thermodynamic processes given under Column I with the expressions given under Column II. $\begin{matrix} Column I & Column II (A) Freezing of water at 273 K and 1 atm & (P) q = 0 (B) Expansion of 1 mol of an ideal gas into a & (Q) w = 0 vacuum under isolated conditions (C) Mixing of equal volumes of two ideal gases at & (R) Δ S_{s y s} < 0 constant temperature and pressure in an isolated container (D) Reversible heating of H_{2} (g) at 1 atm from & (S) Δ U = 0 300 K to 600 K, followed by reversible cooling to 300 K at 1 atm (T) Δ G = 0 \end{matrix}$

Discussion

35.	Balance the following chemical equation:N2 + H2 ⇒ NH3
Answer» Balance the following chemical equation: $N_{2} + H_{2} \Rightarrow N H_{3}$

Discussion

36.	The work function of a metal is 4.2 eν. If radiations of 2000oA fallon the metal, then the kinetic energy of the fastest photoelectron is
Answer» The work function of a metal is 4.2 $e ν$ . If radiations of $2000 o A$ fallon the metal, then the kinetic energy of the fastest photoelectron is

Discussion

37.	An organic compound (A) , is insoluble in aqueous NaHCO_3 but soluble in NaOH. (A) on treatment with bromine water , rapidly forms compound (B) . Give structures of (A) and (B). What will be (A) if it does not dissolve in NaOH solution but shows the other mentioned reactions? Also , state how can thiophene , present in a sample of impure benzene be identified
Answer» An organic compound (A) , is insoluble in aqueous NaHCO_3 but soluble in NaOH. (A) on treatment with bromine water , rapidly forms compound (B) . Give structures of (A) and (B). What will be (A) if it does not dissolve in NaOH solution but shows the other mentioned reactions? Also , state how can thiophene , present in a sample of impure benzene be identified

Discussion

38.	25.For chemical reaction , delta Heat of reaction is equal to Delta heat of formation of products-Delta heat of formation of reactants for H2 (g)+1/2O2(g) --> H2O (g) is ?
Answer» 25.For chemical reaction , delta Heat of reaction is equal to Delta heat of formation of products-Delta heat of formation of reactants for H2 (g)+1/2O2(g) --> H2O (g) is ?

Discussion

39.	The molarity of pure water at 4∘C is
Answer» The molarity of pure water at $4^{\circ} C$ is

Discussion

40.	Write the rate equation for the reaction 2A+B⟶C if the order of the reaction is zero.
Answer» Write the rate equation for the reaction $2 A + B ⟶ C$ if the order of the reaction is zero.

Discussion

41.	An enzyme contains 5.6% Fe calculate number of Fe atoms present in 1g of enzyme
Answer» An enzyme contains 5.6% Fe calculate number of Fe atoms present in 1g of enzyme

Discussion

42.	The force of attraction between the nucleus and the electron is equal to the centrifugal force on the electron . But why it isn't centripetal . Explain with the help of free body diagram in two different cases.
Answer» The force of attraction between the nucleus and the electron is equal to the centrifugal force on the electron . But why it isn't centripetal . Explain with the help of free body diagram in two different cases.

Discussion

43.	Which of the following aqueous solutions is a buffer with a pH greater than 7.0? For HNO_{2 }, K_a = 4.6 × 10^{-4 }, and for NH_3, K_{b }=1.8 × 10^{-5} (1) 10 mL of 0.1 M NH_3,(aq) + 10 mL of 0.1 M HCl (aq) (2) 10 mL of 0.1 M HNO_2,(aq) + 5.0 mL of O.1 M NaOH (aq) (3) 10 mL of 0.1 M HNO_2,(aq) + 10 mL of 0.1 M NaOH (aq) (4) 10 mL of 0.1 M NH_3, (aq) + 5.0 mL of 0.1 M HCl (aq)
Answer» Which of the following aqueous solutions is a buffer with a pH greater than 7.0? For HNO_{2 }, K_a = 4.6 × 10^{-4 }, and for NH_3, K_{b }=1.8 × 10^{-5} (1) 10 mL of 0.1 M NH_3,(aq) + 10 mL of 0.1 M HCl (aq) (2) 10 mL of 0.1 M HNO_2,(aq) + 5.0 mL of O.1 M NaOH (aq) (3) 10 mL of 0.1 M HNO_2,(aq) + 10 mL of 0.1 M NaOH (aq) (4) 10 mL of 0.1 M NH_3, (aq) + 5.0 mL of 0.1 M HCl (aq)

Discussion

44.	R/M, Is, gas inside pressure cooker is also called plasma gas.
Answer» R/M, Is, gas inside pressure cooker is also called plasma gas.

Discussion

45.	What is global warming? Mention the effects.
Answer» What is global warming? Mention the effects.

Discussion

46.	The following arrangement of flasks is set up. Assuming no temperature change, determine the final pressure inside the system after all stopcocks are opened. The connecting tube has zero volume.V(L)4.0,3.0,5.0p(atm)0.792,1.23,2.51
Answer» The following arrangement of flasks is set up. Assuming no temperature change, determine the final pressure inside the system after all stopcocks are opened. The connecting tube has zero volume. $\begin{matrix} V (L) & 4.0, & 3.0, & 5.0 p (atm) & 0.792, & 1.23, & 2.51 \end{matrix}$

Discussion

47.	Which of the following given statement(s) is/are incorrect? (a) There are five unpaired electrones in (n-1)d subshell of Fe^{3+} (b) The number of nodal planes in 4d_{xy} orbital is one. (3) In Ag atom, 23 electrones have a spin of one type and 24 of the opposite type. (1) (b) & (c) (2) Only (b) (3) Only (c) (4) Only (a)
Answer» Which of the following given statement(s) is/are incorrect? (a) There are five unpaired electrones in (n-1)d subshell of Fe^{3+} (b) The number of nodal planes in 4d_{xy} orbital is one. (3) In Ag atom, 23 electrones have a spin of one type and 24 of the opposite type. (1) (b) & (c) (2) Only (b) (3) Only (c) (4) Only (a)

Discussion

48.	How to identify a strong field and weak field ligand in case of VBT(Valence bond theory)?
Answer» How to identify a strong field and weak field ligand in case of VBT(Valence bond theory)?

Discussion

49.	Write the increasing order of the value is CFSE for the following species [Co(NH3)6]3+ [Rh(NH3)6]3+ [Ir (NH3)6]3+
Answer» Write the increasing order of the value is CFSE for the following species [Co(NH3)6]3+ [Rh(NH3)6]3+ [Ir (NH3)6]3+

Discussion

50.	For the stable conformer of Z−CH2−CH2−ZGiven that μobs=∑μixiwhere μi is the dipole moment of the stable conformer and xi is the mole fraction of that conformer.If μsolution=1D and xanti=0.82Then value of μgauche is
Answer» For the stable conformer of $Z - C H_{2} - C H_{2} - Z$ Given that $μ_{o b s} = \sum μ_{i} x_{i}$ where $μ_{i}$ is the dipole moment of the stable conformer and $x_{i}$ is the mole fraction of that conformer. If $μ_{s o l u t i o n} = 1 D$ and $x_{a n t i} = 0.82$ Then value of $μ_{g a u c h e}$ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The standard oxidation potentials Eo, for the half cell reactions are given asZn→Zn2++2e−, E∘=+0.76 VFe→Fe2++2e−, E∘=+0.41 VThe EMF for the cell reaction,Fe2++Zn→Zn2++Fe is:

f(x)=x^2+2x+4 find range of the function

What will happen if two different alkyl halides are taken in wurtz reaction?

30. select incorrect among the following (1) levelling effect of water indicate mineral acids appear to be equally strong due to its complete ionisation (2)order of acidic strength in ch3cOOh solvent is HNO3

how many atoms of phosphorus are present in 0.1 mole of P4 molecules?

Which among the following is most acidic?

Classify the following reactions in one of the reaction type studied in this unit. (a) CH3CH2Br+HS–→CH3CH2SH+Br– (b) (CH3)2C=CH2+HCl→(CH3)2ClC–CH3 (c) CH3CH2Br+HO–→CH2=CH2+H2O+Br– (d) (CH3)3C–CH2OH+HBr→(CH3)2CBrCH2CH3+H2O

22. A proton and an alpha particle accelerated through some potential difference in ratio 2:1. The ratio of de broglie wavelength associated with proton to that of alpha particle is

The △ S for the reaction: 2H2 +O2 =2H2O at 300k when SH2=126.6, SO2=201.20, SH2O=68.0JKmol respectively

Compressibility factor for CO2 at 400 K and 71.0 bar is 0.8697. Molar volume of CO2 under these conditions is:

The alkene which gives 4,4-dimethylpentan-2-one on reductive ozonolysis is

is azulene aromatic ,non aromatic, antiaromaticWhy ?It contains both aromatic and anti aromatic Ring

Select the most stable carbocation among the following?

{ 14. }3 -Phenyl propene on reaction with HBr gives }} (as a major product) }{ (1) }C_6H_5CH_2CH(Br)CH_3}{ (2) }C_6H_5CH_2CH(Br)CH_2CH_3}{ (3) }C_6H_5CH_2CH_2CH_2Br}{ (4) }C_6H_5CH(Br)CH=CH_2

Explain how an electric cell helps a bulb glow.

In Cr2O2−7

The compressibility factor for an ideal gas is?

In a compound of hydrocarbon ,carbon contains 81.81%and 18.18%hydrogen .calculate molecular formula of compound?

Light is required for the light dependent reactions because

what is degree of association?

The amount of electricity required to deposit 0.9gof aluminum the electrode reaction isAl3++3e−→Al(atomic mass of Al = 27)

Define fractional distillation.

The heat of combustion of sucrose (C12H22O11) is −5.65×103 kJ. If complete combustion of 1.0 kg sucrose is done, heat evloved will be:

Do all non polar molecules have linear shape? For instance, BeF2 where mue = 0? And polar molecules always possess shapes such that the mue will be always greater than p? Ex- H2O

Calculate the wavelength associated with an electron moving with a velocity of 109 cm/s.

Which of the following acts as a reducing agent?

what is the relation between de broglie wavelentgh and temperature?

If 0.5 mole of BaCl2 is mixed with 0.2 mole of Na3PO4, the maximum number of moles of Ba3(PO4)2 formed are

What will be the volume of CO2 at STP (atm) obtained on heating 10 grams of 90% pure limestone?

It is easier to start a car engine on a warm day than on a chilly day .why?

What is the molality of pure liquid benzene if it's density=1.2g/ml

What is the molarity of OH– in the final solution prepared by mixing 20.0 mL of 0.10 M H2SO4 with 30.0 mL of 0.10 M Ba(OH)2?

Which of the following pairs of d- orbitals will have electron density along the axes?

Balance the following chemical equation:N2 + H2 ⇒ NH3

The work function of a metal is 4.2 eν. If radiations of 2000oA fallon the metal, then the kinetic energy of the fastest photoelectron is

25.For chemical reaction , delta Heat of reaction is equal to Delta heat of formation of products-Delta heat of formation of reactants for H2 (g)+1/2O2(g) --> H2O (g) is ?

The molarity of pure water at 4∘C is

Write the rate equation for the reaction 2A+B⟶C if the order of the reaction is zero.

An enzyme contains 5.6% Fe calculate number of Fe atoms present in 1g of enzyme

The force of attraction between the nucleus and the electron is equal to the centrifugal force on the electron . But why it isn't centripetal . Explain with the help of free body diagram in two different cases.

R/M, Is, gas inside pressure cooker is also called plasma gas.

What is global warming? Mention the effects.

The following arrangement of flasks is set up. Assuming no temperature change, determine the final pressure inside the system after all stopcocks are opened. The connecting tube has zero volume.V(L)4.0,3.0,5.0p(atm)0.792,1.23,2.51

How to identify a strong field and weak field ligand in case of VBT(Valence bond theory)?

Write the increasing order of the value is CFSE for the following species [Co(NH3)6]3+ [Rh(NH3)6]3+ [Ir (NH3)6]3+

For the stable conformer of Z−CH2−CH2−ZGiven that μobs=∑μixiwhere μi is the dipole moment of the stable conformer and xi is the mole fraction of that conformer.If μsolution=1D and xanti=0.82Then value of μgauche is