46295 + Interview Questions in Chemistry

1.	Coagulation of egg white on boiling is an example of denaturation of protein. Explain it in terms of structural changes.
Answer» Coagulation of egg white on boiling is an example of denaturation of protein. Explain it in terms of structural changes.

Discussion

2.	In the following question, a statement fo Assertion (A) followed by a statement fo Reason (R ) is given. Choose the correct option out of the choices given below in each question Assertion (A) Beryllium carbonate is kept in the atmosphere fo carbon dioxide. Reason (R) Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide. (a) Both A and R are correct and R is the correct explanation of A (b) Both A and R are correct but R is not the correct explanation of A (c) Both A and R are not correct (d) A is not correct But R is correct
Answer» In the following question, a statement fo Assertion (A) followed by a statement fo Reason (R ) is given. Choose the correct option out of the choices given below in each question Assertion (A) Beryllium carbonate is kept in the atmosphere fo carbon dioxide. Reason (R) Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide. (a) Both A and R are correct and R is the correct explanation of A (b) Both A and R are correct but R is not the correct explanation of A (c) Both A and R are not correct (d) A is not correct But R is correct

Discussion

3.	The values of the Henry's law constant Ar, CO2, CH4 and O2 in water at 25 oC are 40.30, 1.67, 0.41 and 34.86 kbar respectively. The order of their solubility in water at the same temperature and pressure is
Answer» The values of the Henry's law constant $A r, C O_{2}, C H_{4} a n d O_{2}$ in water at $25^{o} C$ are 40.30, 1.67, 0.41 and 34.86 kbar respectively. The order of their solubility in water at the same temperature and pressure is

Discussion

4.	The freezing point (∘C) of a solution containing 0.1 g of K3[Fe(CN)6] (molecular weight 329) in 100 g of water (Kf=1.86Kkgmol−1)
Answer» The freezing point $(^{\circ} C)$ of a solution containing 0.1 g of $K_{3} [F e (C N)_{6}]$ (molecular weight 329) in 100 g of water $(K_{f} = 1.86 K k g m o l^{- 1})$

Discussion

5.	2MnO−4+5H2O2+6H+⟶2Z+5O2+8H2O In this reaction Z is
Answer» $2 M n O_{4}^{-} + 5 H_{2} O_{2} + 6 H^{+} ⟶ 2 Z + 5 O_{2} + 8 H_{2} O$ In this reaction Z is

Discussion

6.	Eº for the reaction Fe + Zn2+ = Zn + Fe2+ is - 0.35 V. The given cell reaction is
Answer» Eº for the reaction Fe + Zn2+ = Zn + Fe2+ is - 0.35 V. The given cell reaction is

6.

Eº for the reaction Fe + Zn2+ = Zn + Fe2+ is - 0.35 V. The given cell reaction is

Answer»

Eº for the reaction

Fe + Zn2+ = Zn + Fe2+ is - 0.35 V.

The given cell reaction is

Discussion

7.	The correct increasing order of C - O bond lengths among CO,CO2−3 and CO2 is
Answer» The correct increasing order of C - O bond lengths among $C O, C O_{3}^{2 -}$ and $C O_{2}$ is

Discussion

8.	18 g of glucose (C6H12O6) is present in 1000 g of an aqueous solution of glucose. The molality of this solution is:
Answer» 18 g of glucose (C₆H₁₂O₆) is present in 1000 g of an aqueous solution of glucose. The molality of this solution is:

Discussion

9.	The molecule which can disproportionate is:
Answer» The molecule which can disproportionate is:

Discussion

10.	The reaction(s) which does not occur, is/are:
Answer» The reaction(s) which does not occur, is/are:

Discussion

11.	The graph that depicts Einstein photoelectric effect for a monochromatic source of frequency above the threshold frequency is:
Answer» The graph that depicts Einstein photoelectric effect for a monochromatic source of frequency above the threshold frequency is:

Discussion

12.	The Dow's process is used for the preparation of
Answer» The Dow's process is used for the preparation of

Discussion

13.	When ethyl iodide and propyl iodide react with Na in the presence of ether, they form
Answer» When ethyl iodide and propyl iodide react with Na in the presence of ether, they form

Discussion

14.	Which of the following compounds is used as an antifreeze in automobile radiators?
Answer» Which of the following compounds is used as an antifreeze in automobile radiators?

Discussion

15.	Volume occupied by molecules of one mole gas at N.T.P., each having radius of 10−8 cm
Answer» Volume occupied by molecules of one mole gas at N.T.P., each having radius of $10^{- 8}$ cm

Discussion

16.	Is there hydrogen bonding in D2O(heavy water)?
Answer» Is there hydrogen bonding in D2O(heavy water)?

Discussion

17.	Sodium nitrate decomposes above 800°C and does not give:
Answer» Sodium nitrate decomposes above 800°C and does not give:

Discussion

18.	The shape of ClF3 according to VSEPR model is
Answer» The shape of $C l F_{3}$ according to VSEPR model is

Discussion

19.	In a solid 'AB' having the NaCl structure, 'A' atoms occupy the corners of the cubic unit cell. If all the face-centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is [IIT Screening 2001]
Answer» In a solid 'AB' having the NaCl structure, 'A' atoms occupy the corners of the cubic unit cell. If all the face-centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is [IIT Screening 2001]

Discussion

20.	The number of radial nodes in 5d orbital is:
Answer» The number of radial nodes in $5 d$ orbital is:

Discussion

21.	The first ionization energy (in kJ/mol) of Na, Mg, Al and Si, respectively, are:
Answer» The first ionization energy (in kJ/mol) of Na, Mg, Al and Si, respectively, are:

Discussion

22.	Question 14 The pair of ions having same electronic configuration is............. (a) Cr3+,Fe3+ (b) Fe3+,Mn2++ (c) Fe3+,Co3+ (d) SC3+,Cr3+
Answer» Question 14 The pair of ions having same electronic configuration is............. (a) $C r^{3 +}, F e^{3 +}$ (b) $F e^{3 +}, M n^{2 +} +$ (c) $F e^{3 +}, C o^{3 +}$ (d) $S C^{3 +}, C r^{3 +}$

22.

Question 14 The pair of ions having same electronic configuration is............. (a) Cr3+,Fe3+ (b) Fe3+,Mn2++ (c) Fe3+,Co3+ (d) SC3+,Cr3+

Answer»

Question 14

The pair of ions having same electronic configuration is.............

(a) $C r^{3 +}, F e^{3 +}$ (b) $F e^{3 +}, M n^{2 +} +$ (c) $F e^{3 +}, C o^{3 +}$ (d) $S C^{3 +}, C r^{3 +}$

Discussion

23.	The back - side attack on 2 - bromobutane by methoxide (CH3O⊖) gives the product shown below. Which Fischer projection represents 2 - bromobutane used as the reactant in this reaction?
Answer» The back - side attack on 2 - bromobutane by methoxide $(C H_{3} O^{⊖})$ gives the product shown below. Which Fischer projection represents 2 - bromobutane used as the reactant in this reaction?

Discussion

24.	If ∈0 is the permittivity of vacuum and r is the radius of the orbit of H – atom in which the electron is revolving, then the velocity of the electron is given by:
Answer» If $\in_{0}$ is the permittivity of vacuum and $r$ is the radius of the orbit of H – atom in which the electron is revolving, then the velocity of the electron is given by:

Discussion

25.	Structure of disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units. (a) 'a' carbon of glucose and 'a' carbon of fructose (b) 'a' carbon of glucose and 'e' carbon of fructose (c) 'a' carbon of glucose and 'b' carbon of fructose (d) 'f'' carbon of glucose and 'f'' carbon of fructose
Answer» Structure of disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units. (a) 'a' carbon of glucose and 'a' carbon of fructose (b) 'a' carbon of glucose and 'e' carbon of fructose (c) 'a' carbon of glucose and 'b' carbon of fructose (d) 'f'' carbon of glucose and 'f'' carbon of fructose

Discussion

26.	The van der Waals' parameters for gases W,X,Y and Z are Gasa(litre2−atom/mol2)b(litre/mol)W4.00.027X8.00.030Y6.00.032Z12.00.027 Which one of these gases has the highest critical temperature?
Answer» The van der Waals' parameters for gases W,X,Y and Z are $\begin{matrix} G a s & a (l i t r e^{2} - a t o m / m o l^{2}) & b (l i t r e / m o l) W & 4.0 & 0.027 X & 8.0 & 0.030 Y & 6.0 & 0.032 Z & 12.0 & 0.027 \end{matrix}$ Which one of these gases has the highest critical temperature?

26.

The van der Waals' parameters for gases W,X,Y and Z are Gasa(litre2−atom/mol2)b(litre/mol)W4.00.027X8.00.030Y6.00.032Z12.00.027 Which one of these gases has the highest critical temperature?

Answer»

The van der Waals' parameters for gases W,X,Y and Z are

$\begin{matrix} G a s & a (l i t r e^{2} - a t o m / m o l^{2}) & b (l i t r e / m o l) W & 4.0 & 0.027 X & 8.0 & 0.030 Y & 6.0 & 0.032 Z & 12.0 & 0.027 \end{matrix}$

Which one of these gases has the highest critical temperature?

Discussion

27.	At 80∘C, distilled water has hydronium ion (H3O+) concentration equal to 1×10−6mol/L. The value of Kw at this temperature would be:
Answer» At $80^{\circ} C$ , distilled water has hydronium ion $(H_{3} O^{+})$ concentration equal to $1 \times 10^{- 6} m o l / L$ . The value of $K_{w}$ at this temperature would be:

Discussion

28.	The density of 3M solution of Na2S2O3 is 1.25 g mL−1. Calculate, mole fraction of Na2S2O3.
Answer» The density of 3M solution of $N a_{2} S_{2} O_{3}$ is $1.25$ g mL $^{- 1}$ . Calculate, mole fraction of $N a_{2} S_{2} O_{3}$ .

Discussion

29.	Two moles of a monoatomic ideal gas undergoes a process AB as shown in the figure. Then find the work done during the process in joule. ___ 0
Answer» Two moles of a monoatomic ideal gas undergoes a process AB as shown in the figure. Then find the work done during the process in joule. ___ 0

Discussion

30.	A one litre glass flask contains some mercury. It is found that at different temperatures the volume of air inside the flask remains the same. The volume of mercury in this flask, if coefficient of linear expansion of glass is 9×10−6 (oC)−1 , while volume of expansion of mercury is 1.8×10−4 (oC)−1 will be (in cm3) (volume of air remains same).
Answer» A one litre glass flask contains some mercury. It is found that at different temperatures the volume of air inside the flask remains the same. The volume of mercury in this flask, if coefficient of linear expansion of glass is $9 \times 10^{- 6} {(o C)}^{- 1}$ , while volume of expansion of mercury is $1.8 \times 10^{- 4} {(o C)}^{- 1}$ will be (in $c m^{3}$ ) (volume of air remains same).

Discussion

31.	Given that: E∘Fe2+/Fe=−0.44 V and E∘Fe3+/Fe2+=0.77 V.E∘Fe3+/Fe is:
Answer» Given that: $E_{F e^{2 +} / F e}^{\circ} = - 0.44 V and E_{F e^{3 +} / F e^{2 +}}^{\circ} = 0.77 V . E_{F e^{3 +} / F e}^{\circ} i s :$

Discussion

32.	The most common oxidation state of an element is -2. The number of electrons present in its outermost shell is:
Answer» The most common oxidation state of an element is -2. The number of electrons present in its outermost shell is:

Discussion

33.	dπ−pπ bond present in:
Answer» $d π - p π$ bond present in:

Discussion

34.	When tert-butylchloride is added to an equal amount of ethanol in an inert solvent, one of the products is ethyl tert-butyl ether. When the concentration of tert-butyl chloride is doubled, the rate of the reaction:
Answer» When tert-butylchloride is added to an equal amount of ethanol in an inert solvent, one of the products is ethyl tert-butyl ether. When the concentration of tert-butyl chloride is doubled, the rate of the reaction:

Discussion

35.	A single compound of the structure is obtainable from ozonolysis of which if the following cyclic compounds?
Answer» A single compound of the structure is obtainable from ozonolysis of which if the following cyclic compounds?

Discussion

36.	A solution is saturated with SrCO3 and SrF2. The [CO2−3] is found to be 1.2×10−3M. if the value of solublity product of SrCO3 and SrF2 are 7.0×10−10 and 7.9×10−9 resectively.The concentration of F− in the solution would be
Answer» A solution is saturated with $S r C O_{3}$ and $S r F_{2}$ . The $[C O_{3}^{2 -}]$ is found to be $1.2 \times 10^{- 3} M .$ if the value of solublity product of $S r C O_{3}$ and $S r F_{2}$ are $7.0 \times 10^{- 10} a n d 7.9 \times 10^{- 9}$ resectively.The concentration of $F^{-}$ in the solution would be

Discussion

37.	For the reaction CO(g)+12O2(g)→CO2(g),ΔH and ΔS are −283 kJ and −87 J K−1 mol−1 respectively. It was intended to carry out this reaction at 1000, 1500, 3000 and 3500 K. At which of these temperatures would this reaction be thermodynamically spontaneous?
Answer» For the reaction $C O (g) + \frac{1}{2} O_{2} (g) \to C O_{2} (g), Δ H$ and $Δ S$ are $- 283 k J$ and $- 87 J K^{- 1} m o l^{- 1}$ respectively. It was intended to carry out this reaction at 1000, 1500, 3000 and 3500 K. At which of these temperatures would this reaction be thermodynamically spontaneous?

Discussion

38.	On adding FeCl3 solution into NaOH solution, a possitively charged colloidal sol is obtained when the following are mixed:
Answer» On adding FeCl₃ solution into NaOH solution, a possitively charged colloidal sol is obtained when the following are mixed:

Discussion

39.	25 ml of a solution containing HCl and sulphuric acid required 10 ml of a 2.0 N NaOH solution for neutralisation. 10 ml of the same acid mixture on being treated with an excess of BaCl2 gave 0.699 gm of BaSO4. The normality of HCl is .
Answer» 25 ml of a solution containing $H C l$ and sulphuric acid required 10 ml of a 2.0 N $N a O H$ solution for neutralisation. 10 ml of the same acid mixture on being treated with an excess of $B a C l_{2}$ gave 0.699 gm of $B a S O_{4}$ . The normality of $H C l$ is .

Discussion

40.	In an acidic buffer the ratio [acid]/[salt] is 0.5. If we make the concentration of acid, twice of its initial value then what is value of 10 ΔpH. [log2=0.3]
Answer» In an acidic buffer the ratio $[a c i d] / [s a l t]$ is $0.5$ . If we make the concentration of acid, twice of its initial value then what is value of $10$ $Δ p H . [log 2 = 0.3]$

Discussion

41.	Which of the following compounds do not follow Law of definite proportion?
Answer» Which of the following compounds do not follow Law of definite proportion?

Discussion

42.	Binding energy per nucleon for C12 is 7.68 MeV and that for C13 is 7.5 MeV. If energy required to remove a neutron from C13 is x MeV, then x is (Write upto two digits after the decimal point.)
Answer» Binding energy per nucleon for $C^{12}$ is 7.68 MeV and that for $C^{13}$ is 7.5 MeV. If energy required to remove a neutron from $C^{13}$ is $x M e V$ , then $x$ is (Write upto two digits after the decimal point.)

Discussion

43.	Rate constant of a reaction is 175 litre2 mol−2 sec−1. What is the order of reaction?
Answer» Rate constant of a reaction is $175 l i t r e^{2} m o l^{- 2} s e c^{- 1}$ . What is the order of reaction?

Discussion

44.	The suitable reagent for the following conversion? i.e. CH3−C≡C−CH3R⟶trans-alkene:
Answer» The suitable reagent for the following conversion? i.e. $C H_{3} - C \equiv C - C H_{3} R ⟶ trans-alkene$ :

Discussion

45.	Which of the following reactions will generate a 3∘ alcohol?
Answer» Which of the following reactions will generate a $3^{\circ}$ alcohol?

Discussion

46.	What is the loss in mass during the change: 3Li7+1H1→2 2He4+17.25 MeV
Answer» What is the loss in mass during the change: $_{3} L i^{7} +_{1} H^{1} \to 2_{2} H e^{4} + 17.25 M e V$

Discussion

47.	Who discovered electron?
Answer» Who discovered electron?

Discussion

48.	What is cyonide ?
Answer» What is cyonide ?

Discussion

49.	On what factors does the strength of an acid depends ?
Answer» On what factors does the strength of an acid depends ?

Discussion

50.	formation of covalent bond between the atoms involved a)wave nature of electrons b)particle nature of electrons c)both a and b d) none
Answer» formation of covalent bond between the atoms involved a)wave nature of electrons b)particle nature of electrons c)both a and b d) none

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Coagulation of egg white on boiling is an example of denaturation of protein. Explain it in terms of structural changes.

The values of the Henry's law constant Ar, CO2, CH4 and O2 in water at 25 oC are 40.30, 1.67, 0.41 and 34.86 kbar respectively. The order of their solubility in water at the same temperature and pressure is

The freezing point (∘C) of a solution containing 0.1 g of K3[Fe(CN)6] (molecular weight 329) in 100 g of water (Kf=1.86Kkgmol−1)

2MnO−4+5H2O2+6H+⟶2Z+5O2+8H2O In this reaction Z is

Eº for the reaction Fe + Zn2+ = Zn + Fe2+ is - 0.35 V. The given cell reaction is

The correct increasing order of C - O bond lengths among CO,CO2−3 and CO2 is

18 g of glucose (C6H12O6) is present in 1000 g of an aqueous solution of glucose. The molality of this solution is:

The molecule which can disproportionate is:

The reaction(s) which does not occur, is/are:

The graph that depicts Einstein photoelectric effect for a monochromatic source of frequency above the threshold frequency is:

The Dow's process is used for the preparation of

When ethyl iodide and propyl iodide react with Na in the presence of ether, they form

Which of the following compounds is used as an antifreeze in automobile radiators?

Volume occupied by molecules of one mole gas at N.T.P., each having radius of 10−8 cm

Is there hydrogen bonding in D2O(heavy water)?

Sodium nitrate decomposes above 800°C and does not give:

The shape of ClF3 according to VSEPR model is

In a solid 'AB' having the NaCl structure, 'A' atoms occupy the corners of the cubic unit cell. If all the face-centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is [IIT Screening 2001]

The number of radial nodes in 5d orbital is:

The first ionization energy (in kJ/mol) of Na, Mg, Al and Si, respectively, are:

Question 14 The pair of ions having same electronic configuration is............. (a) Cr3+,Fe3+ (b) Fe3+,Mn2++ (c) Fe3+,Co3+ (d) SC3+,Cr3+

The back - side attack on 2 - bromobutane by methoxide (CH3O⊖) gives the product shown below. Which Fischer projection represents 2 - bromobutane used as the reactant in this reaction?

If ∈0 is the permittivity of vacuum and r is the radius of the orbit of H – atom in which the electron is revolving, then the velocity of the electron is given by:

The van der Waals' parameters for gases W,X,Y and Z are Gasa(litre2−atom/mol2)b(litre/mol)W4.00.027X8.00.030Y6.00.032Z12.00.027 Which one of these gases has the highest critical temperature?

At 80∘C, distilled water has hydronium ion (H3O+) concentration equal to 1×10−6mol/L. The value of Kw at this temperature would be:

The density of 3M solution of Na2S2O3 is 1.25 g mL−1. Calculate, mole fraction of Na2S2O3.

Two moles of a monoatomic ideal gas undergoes a process AB as shown in the figure. Then find the work done during the process in joule. ___ 0

Given that: E∘Fe2+/Fe=−0.44 V and E∘Fe3+/Fe2+=0.77 V.E∘Fe3+/Fe is:

The most common oxidation state of an element is -2. The number of electrons present in its outermost shell is:

dπ−pπ bond present in:

When tert-butylchloride is added to an equal amount of ethanol in an inert solvent, one of the products is ethyl tert-butyl ether. When the concentration of tert-butyl chloride is doubled, the rate of the reaction:

A single compound of the structure is obtainable from ozonolysis of which if the following cyclic compounds?

A solution is saturated with SrCO3 and SrF2. The [CO2−3] is found to be 1.2×10−3M. if the value of solublity product of SrCO3 and SrF2 are 7.0×10−10 and 7.9×10−9 resectively.The concentration of F− in the solution would be

For the reaction CO(g)+12O2(g)→CO2(g),ΔH and ΔS are −283 kJ and −87 J K−1 mol−1 respectively. It was intended to carry out this reaction at 1000, 1500, 3000 and 3500 K. At which of these temperatures would this reaction be thermodynamically spontaneous?

On adding FeCl3 solution into NaOH solution, a possitively charged colloidal sol is obtained when the following are mixed:

25 ml of a solution containing HCl and sulphuric acid required 10 ml of a 2.0 N NaOH solution for neutralisation. 10 ml of the same acid mixture on being treated with an excess of BaCl2 gave 0.699 gm of BaSO4. The normality of HCl is .

In an acidic buffer the ratio [acid]/[salt] is 0.5. If we make the concentration of acid, twice of its initial value then what is value of 10 ΔpH. [log2=0.3]

Which of the following compounds do not follow Law of definite proportion?

Binding energy per nucleon for C12 is 7.68 MeV and that for C13 is 7.5 MeV. If energy required to remove a neutron from C13 is x MeV, then x is (Write upto two digits after the decimal point.)

Rate constant of a reaction is 175 litre2 mol−2 sec−1. What is the order of reaction?

The suitable reagent for the following conversion? i.e. CH3−C≡C−CH3R⟶trans-alkene:

Which of the following reactions will generate a 3∘ alcohol?

What is the loss in mass during the change: 3Li7+1H1→2 2He4+17.25 MeV

Who discovered electron?

What is cyonide ?

On what factors does the strength of an acid depends ?

formation of covalent bond between the atoms involved a)wave nature of electrons b)particle nature of electrons c)both a and b d) none