46295 + Interview Questions in Chemistry

1.	In which of the following pairs Dalton’s law of partial pressures is not applicable:
Answer» In which of the following pairs Dalton’s law of partial pressures is not applicable:

Discussion

2.	The reation between A and B is first order with respect to A and zero order with respect to B. Fill in the blanks in the following table: Experiment[A] mol L−1[B] mol L−1Initial ratemol L−1 min−1I0.10.12.0×10−2II−0.24.0×10−2III0.40.4−IV−0.22.0×10−2
Answer» The reation between A and B is first order with respect to A and zero order with respect to B. Fill in the blanks in the following table: $\begin{matrix} E x p e r i m e n t & [A] m o l L^{- 1} & [B] m o l L^{- 1} & I n i t i a l r a t e m o l L^{- 1} m i n^{- 1} I & 0.1 & 0.1 & 2.0 \times 10^{- 2} I I & - & 0.2 & 4.0 \times 10^{- 2} I I I & 0.4 & 0.4 & - I V & - & 0.2 & 2.0 \times 10^{- 2} \end{matrix}$

2.

The reation between A and B is first order with respect to A and zero order with respect to B. Fill in the blanks in the following table: Experiment[A] mol L−1[B] mol L−1Initial ratemol L−1 min−1I0.10.12.0×10−2II−0.24.0×10−2III0.40.4−IV−0.22.0×10−2

Answer»

The reation between A and B is first order with respect to A and zero order with respect to B. Fill in the blanks in the following table:

$\begin{matrix} E x p e r i m e n t & [A] m o l L^{- 1} & [B] m o l L^{- 1} & I n i t i a l r a t e m o l L^{- 1} m i n^{- 1} I & 0.1 & 0.1 & 2.0 \times 10^{- 2} I I & - & 0.2 & 4.0 \times 10^{- 2} I I I & 0.4 & 0.4 & - I V & - & 0.2 & 2.0 \times 10^{- 2} \end{matrix}$

Discussion

3.	The most stable carbanion among the following is
Answer» The most stable carbanion among the following is

Discussion

4.	The major product of the following reaction is:
Answer» The major product of the following reaction is:

Discussion

5.	Predict the sign of delta S for the following changes; (i) Br2 (g) ---> 2Br (g) (ii) HCOOH (l) ---> H2O (l) + CO2 (g) (iii) I2 (s) ---> I2 (g) (iv) H2 (at 25°C, 1 atm) ---> H2 (at 25°C and 10 atm) (v) H2O (at 25°C, 1 atm) ---> H2O (at 50°C and 1 atm)
Answer» Predict the sign of delta S for the following changes; (i) Br2 (g) ---> 2Br (g) (ii) HCOOH (l) ---> H2O (l) + CO2 (g) (iii) I2 (s) ---> I2 (g) (iv) H2 (at 25°C, 1 atm) ---> H2 (at 25°C and 10 atm) (v) H2O (at 25°C, 1 atm) ---> H2O (at 50°C and 1 atm)

Discussion

6.	The correct graphical representation of Boyle’s law is
Answer» The correct graphical representation of Boyle’s law is

Discussion

7.	In the following reaction, X is neo-pentyl alcohol + H2SO4→x
Answer» In the following reaction, X is neo-pentyl alcohol + ^H₂^SO₄→x

7.

In the following reaction, X is neo-pentyl alcohol + H2SO4→x

Answer»

In the following reaction, X is

neo-pentyl alcohol + ^H₂^SO₄→x

Discussion

8.	Correct order of Boiling point for (i) I – Chloropropane (ii) Isopropyl chloride (iii) 1-Cholor butane
Answer» Correct order of Boiling point for (i) I – Chloropropane (ii) Isopropyl chloride (iii) 1-Cholor butane

Discussion

9.	Ortho-nitrophenol is less soluble in water than p- and m-nitrophenols because
Answer» Ortho-nitrophenol is less soluble in water than p- and m-nitrophenols because

Discussion

10.	CaO and NaCI have the same crystal structure and approximately the same ionic radii. If U is the lattice energy of NaCI, the approximate lattice energy of CaO is
Answer» CaO and NaCI have the same crystal structure and approximately the same ionic radii. If U is the lattice energy of NaCI, the approximate lattice energy of CaO is

Discussion

11.	Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction takes place Zn+2HCl→ZnCl2+H2 Calculate the volume of hydrogen gas liberated at STP when 32.65 g of zinc reacts with HCl. 1 mol of a gas occupies 22.7 L volume at STP; atomic mass of Zn = 65.3u
Answer» Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction takes place $Z n + 2 H C l \to Z n C l_{2} + H_{2}$ Calculate the volume of hydrogen gas liberated at STP when 32.65 g of zinc reacts with HCl. 1 mol of a gas occupies 22.7 L volume at STP; atomic mass of Zn = 65.3u

11.

Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction takes place Zn+2HCl→ZnCl2+H2 Calculate the volume of hydrogen gas liberated at STP when 32.65 g of zinc reacts with HCl. 1 mol of a gas occupies 22.7 L volume at STP; atomic mass of Zn = 65.3u

Answer»

Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction takes place

$Z n + 2 H C l \to Z n C l_{2} + H_{2}$

Calculate the volume of hydrogen gas liberated at STP when 32.65 g of zinc reacts with HCl. 1 mol of a gas occupies 22.7 L volume at STP; atomic mass of Zn = 65.3u

Discussion

12.	Calculate the number of FeSO4.7H2O formula units in 0.5 millimoles of pure FeSO4.7H2O.
Answer» Calculate the number of $F e S O_{4} . 7 H_{2} O$ formula units in 0.5 millimoles of pure $F e S O_{4} . 7 H_{2} O$ .

Discussion

13.	A transmitting antenna is at a height of 40 m and the receiving antenna is at a height of 60 m. The maximum distance between them for satisfactory communication is nearly
Answer» A transmitting antenna is at a height of 40 m and the receiving antenna is at a height of 60 m. The maximum distance between them for satisfactory communication is nearly

Discussion

14.	Veronal and luminal are derivatives of barbituric acid which are ......... (a) tranquilizers (b) non-narcotic analgesic (c) anti-allergic drugs (d) neurologically active drugs
Answer» Veronal and luminal are derivatives of barbituric acid which are ......... (a) tranquilizers (b) non-narcotic analgesic (c) anti-allergic drugs (d) neurologically active drugs

Discussion

15.	Novalgin is a common:
Answer» Novalgin is a common:

Discussion

16.	A standard hydrogen electrode has zero electrode potential because
Answer» A standard hydrogen electrode has zero electrode potential because

Discussion

17.	Arrange the following complex ions in increasing order of crystal field splitting energy △0. [Cr(Cl)6]3−,[Cr(CN)6]3−,[Cr(NH3)6]3+
Answer» Arrange the following complex ions in increasing order of crystal field splitting energy $△_{0} .$ $[C r (C l)_{6}]^{3 -}, [C r (C N)_{6}]^{3 -}, [C r (N H_{3})_{6}]^{3 +}$

Discussion

18.	Which among the following does not exist:-
Answer» Which among the following does not exist:-

Discussion

19.	When 0.5 mols of colemanite (Ca2B6O11) is treated with SO2 in aqueous solution to form orthoboric acid, how many grams of orthoboric acid will be formed? (Take molar mass of boron 11 gm/mol, oxygen 16 gm/mol)
Answer» When 0.5 mols of colemanite $(C a_{2} B_{6} O_{11})$ is treated with $S O_{2}$ in aqueous solution to form orthoboric acid, how many grams of orthoboric acid will be formed? (Take molar mass of boron 11 gm/mol, oxygen 16 gm/mol)

Discussion

20.	An automobile antifreeze consists of 38.7% C, 9.7% H and the remaining oxygen by weight. when 0.093 g of it are vaporized at STP 33.6 mL of vapor are formed. The molecular formula of the antifreeze is:
Answer» An automobile antifreeze consists of $38.7 % C$ , $9.7 % H$ and the remaining oxygen by weight. when $0.093 g$ of it are vaporized at STP $33.6 m L$ of vapor are formed. The molecular formula of the antifreeze is:

Discussion

21.	Calculate the volume occupied by 8.8 g of CO2 at 31.1∘C and 1 bar pressure. R=0.083 bar LK−1 mol−1 .
Answer» Calculate the volume occupied by 8.8 g of $C O_{2}$ at ${31.1}^{\circ} C$ and 1 bar pressure. $R = 0.083 b a r L K^{- 1} m o l^{- 1}$ .

Discussion

22.	IUPAC name of Na3[Co(NO2)6] is
Answer» IUPAC name of $N a_{3} [C o (N O_{2})_{6}]$ is

Discussion

23.	One litre of 2M acetic acid is mixed with one litre of 2M ethyl alcohol to form ester as CH3COOH+C2H5OH→CH3COOC2H5+H2O The decrease in initial reaction rate if each solution is diluted by an equal volume of water would be
Answer» One litre of 2M acetic acid is mixed with one litre of 2M ethyl alcohol to form ester as $C H_{3} C O O H + C_{2} H_{5} O H \to C H_{3} C O O C_{2} H_{5} + H_{2} O$ The decrease in initial reaction rate if each solution is diluted by an equal volume of water would be

Discussion

24.	If 6m=46656, what is the value of 6m−2?
Answer» If $6^{m} = 46656,$ what is the value of $6^{m - 2} ?$

Discussion

25.	All the following statements are false except:
Answer» All the following statements are false except:

Discussion

26.	Which of the following doesn’t react with NaHSO3?
Answer» Which of the following doesn’t react with $N a H S O_{3}$ ?

Discussion

27.	What is the mass of glucose required to produce 44g of CO2 on complete combustion?
Answer» What is the mass of glucose required to produce 44g of CO₂ on complete combustion?

27.

What is the mass of glucose required to produce 44g of CO2 on complete combustion?

Answer»

What is the mass of glucose required to produce 44g of CO₂

on complete combustion?

Discussion

28.	Which of the following cannot undergo disproportionation?
Answer» Which of the following cannot undergo disproportionation?

Discussion

29.	The calomel electrode is reversible with respect to
Answer» The calomel electrode is reversible with respect to

Discussion

30.	The units of molarity is
Answer» The units of molarity is

Discussion

31.	Pure benzene freezes at 5.45ºC but a 0.374 m solution of tetrachloroethane in benzene freezes at 3.55ºC. The Kf for benzene is:
Answer» Pure benzene freezes at 5.45ºC but a 0.374 m solution of tetrachloroethane in benzene freezes at 3.55ºC. The Kf for benzene is:

Discussion

32.	The de-Broglie wavelength associated with a ball of mass 1kg having kinetic energy 0.5 J is
Answer» The de-Broglie wavelength associated with a ball of mass 1kg having kinetic energy 0.5 J is

Discussion

33.	Carbon−60 Contains :
Answer» Carbon $- 60$ Contains :

Discussion

34.	Ethyl phenyl ether on boiling with conc. HBr gives
Answer» Ethyl phenyl ether on boiling with conc. HBr gives

Discussion

35.	H2S is bubbled into 0.2M NaCN solution which is 0.02 M in each [Cd(CN)4]2−and[Ag(CN)2]−. The H2S produces 1×10−9 M sulphide in the solution. (Given, KspAg2S=1×10−50M3;KspCdS=7.1×10−28M2Kinst[Ag(CN)2]−1=1×10−20M2Kinst[Cd(CN)4]−2=7.8×10−18M4) Identify the correct statement
Answer» $H_{2} S$ is bubbled into 0.2M NaCN solution which is 0.02 M in each $[C d (C N)_{4}]_{2 -} a n d [A g (C N)_{2}]^{-}$ . The $H_{2} S$ produces $1 \times 10^{- 9}$ M sulphide in the solution. (Given, $K_{s p} A g_{2} S = 1 \times 10^{- 50} M^{3}; K_{s p} C d S = 7.1 \times 10^{- 28} M^{2} K_{i n s t} [A g (C N)_{2}]^{- 1} = 1 \times 10^{- 20} M^{2} K_{i n s t} [C d (C N)_{4}]^{- 2} = 7.8 \times 10^{- 18} M^{4})$ Identify the correct statement

Discussion

36.	In which one of the following case breaking of covalent bond takes place?
Answer» In which one of the following case breaking of covalent bond takes place?

Discussion

37.	Explain the reason for the fusion of an organic compound with metallic sodium for testing nitrogen, sulphur and halogens.
Answer» Explain the reason for the fusion of an organic compound with metallic sodium for testing nitrogen, sulphur and halogens.

Discussion

38.	For M2+M and M3+M2+ systems the E∘ values for some metals are as follows: Cr2+Cr−0.9V;Cr3+Cr2+−0.4VMn2+Mn−1.2V;Mn3+Mn2++1.5VFe2+Fe−0.4V;Fe3+Fe2++0.8V Use this data to comment upon (i) The stability of Fe3+ in acid solution as compared to that of Cr3+ or Mn3+ The ease with which iron can be oxidised as compared to a similar process of either chromium or manganese metal.
Answer» For $\frac{M^{2 +}}{M}$ and $\frac{M^{3 +}}{M^{2 +}}$ systems the $E^{\circ}$ values for some metals are as follows: $\frac{C r^{2 +}}{C r - 0.9 V}; \frac{C r^{3 +}}{C r^{2 +} - 0.4 V} \frac{M n^{2 +}}{M n - 1.2 V}; \frac{M n^{3 +}}{M n^{2 +}} + 1.5 V \frac{F e^{2 +}}{F e - 0.4 V}; \frac{F e^{3 +}}{F e^{2 +}} + 0.8 V$ Use this data to comment upon (i) The stability of $F e^{3 +}$ in acid solution as compared to that of $C r^{3 +}$ or $M n^{3 +}$ The ease with which iron can be oxidised as compared to a similar process of either chromium or manganese metal.

38.

For M2+M and M3+M2+ systems the E∘ values for some metals are as follows: Cr2+Cr−0.9V;Cr3+Cr2+−0.4VMn2+Mn−1.2V;Mn3+Mn2++1.5VFe2+Fe−0.4V;Fe3+Fe2++0.8V Use this data to comment upon (i) The stability of Fe3+ in acid solution as compared to that of Cr3+ or Mn3+ The ease with which iron can be oxidised as compared to a similar process of either chromium or manganese metal.

Answer»

For $\frac{M^{2 +}}{M}$ and $\frac{M^{3 +}}{M^{2 +}}$ systems the $E^{\circ}$ values for some metals are as follows:
$\frac{C r^{2 +}}{C r - 0.9 V}; \frac{C r^{3 +}}{C r^{2 +} - 0.4 V} \frac{M n^{2 +}}{M n - 1.2 V}; \frac{M n^{3 +}}{M n^{2 +}} + 1.5 V \frac{F e^{2 +}}{F e - 0.4 V}; \frac{F e^{3 +}}{F e^{2 +}} + 0.8 V$
Use this data to comment upon
(i) The stability of $F e^{3 +}$ in acid solution as compared to that of $C r^{3 +}$ or $M n^{3 +}$

The ease with which iron can be oxidised as compared to a similar process of either chromium or manganese metal.

Discussion

39.	Match the items of Column I with the items of Column II and assign the correct code. Column IColumn IIA. Sapphire1. Al2O3B. Sphalerite2. NaCNC. Depressant3. CoD. Corundum4. ZnS5. Fe2O3 Codes A B C D A B C D (a) 3 4 2 1 (b) 5 4 3 2 (c) 2 3 4 5 (d) 1 2 3 4
Answer» Match the items of Column I with the items of Column II and assign the correct code. $\begin{matrix} C o l u m n I & C o l u m n I I A . S a p p h i r e & 1. A l_{2} O_{3} B . S p h a l e r i t e & 2. N a C N C . D e p r e s s a n t & 3. C o D . C o r u n d u m & 4. Z n S 5. F e_{2} O_{3} \end{matrix}$ Codes A B C D A B C D (a) 3 4 2 1 (b) 5 4 3 2 (c) 2 3 4 5 (d) 1 2 3 4

Discussion

40.	A neutral atom will have the lowest ionization potential when electronic configuration is:-
Answer» A neutral atom will have the lowest ionization potential when electronic configuration is:-

Discussion

41.	Which of the following sets has all the species that do not follow octet rule?
Answer» Which of the following sets has all the species that do not follow octet rule?

Discussion

42.	The major product of the reaction of 2-butene with alkaline KMnO4 solution is
Answer» The major product of the reaction of 2-butene with alkaline KMnO $_{4}$ solution is

Discussion

43.	The functional group present in a molecule having the formula C12O9 is
Answer» The functional group present in a molecule having the formula C $_{12}$ O $_{9}$ is

Discussion

44.	Consider the following reaction and choose the correct option(s).
Answer» Consider the following reaction and choose the correct option(s).

Discussion

45.	Which of the following reagents could be used to distinguish between butanone and tert-butyl alcohol?
Answer» Which of the following reagents could be used to distinguish between butanone and tert-butyl alcohol?

Discussion

46.	(a) Name the method of refining which is (i) Used to obtain semiconductor of high purity. (ii) Used to obtain low boiling metal. (b) Write chemical reactions taking place in the extraction of copper from Cu2S.
Answer» (a) Name the method of refining which is (i) Used to obtain semiconductor of high purity. (ii) Used to obtain low boiling metal. (b) Write chemical reactions taking place in the extraction of copper from $C u_{2} S$ .

Discussion

47.	The reaction, MgO(s)+C(s)→Mg(s)+CO(g), For which △rHo=+491.1kJ mol−1and△rS∘=198.0JK−1mol−1 is not feasible at 298 K. Temperature above which reaction will be feasible is
Answer» The reaction, $M g O (s) + C (s) \to M g (s) + C O (g),$ For which $△_{r} H^{o} = + 491.1 k J m o l^{- 1} a n d △_{r} S^{\circ} = 198.0 J K^{- 1} m o l^{- 1}$ is not feasible at 298 K. Temperature above which reaction will be feasible is

Discussion

48.	Which out of the following is not aromatic compounds?
Answer» Which out of the following is not aromatic compounds?

Discussion

49.	The lattice energy order for lithium halides is:
Answer» The lattice energy order for lithium halides is:

Discussion

50.	Question 45 Predict the hybridisation of each carbon in the molecule of organic compound given below. Also indicate the total number of sigma and pi-bonds in this molecule.
Answer» Question 45 Predict the hybridisation of each carbon in the molecule of organic compound given below. Also indicate the total number of sigma and pi-bonds in this molecule.

50.

Question 45 Predict the hybridisation of each carbon in the molecule of organic compound given below. Also indicate the total number of sigma and pi-bonds in this molecule.

Answer»

Question 45

Predict the hybridisation of each carbon in the molecule of organic compound given below. Also indicate the total number of sigma and pi-bonds in this molecule.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In which of the following pairs Dalton’s law of partial pressures is not applicable:

The reation between A and B is first order with respect to A and zero order with respect to B. Fill in the blanks in the following table: Experiment[A] mol L−1[B] mol L−1Initial ratemol L−1 min−1I0.10.12.0×10−2II−0.24.0×10−2III0.40.4−IV−0.22.0×10−2

The most stable carbanion among the following is

The major product of the following reaction is:

Predict the sign of delta S for the following changes; (i) Br2 (g) ---> 2Br (g) (ii) HCOOH (l) ---> H2O (l) + CO2 (g) (iii) I2 (s) ---> I2 (g) (iv) H2 (at 25°C, 1 atm) ---> H2 (at 25°C and 10 atm) (v) H2O (at 25°C, 1 atm) ---> H2O (at 50°C and 1 atm)

The correct graphical representation of Boyle’s law is

In the following reaction, X is neo-pentyl alcohol + H2SO4→x

Correct order of Boiling point for (i) I – Chloropropane (ii) Isopropyl chloride (iii) 1-Cholor butane

Ortho-nitrophenol is less soluble in water than p- and m-nitrophenols because

CaO and NaCI have the same crystal structure and approximately the same ionic radii. If U is the lattice energy of NaCI, the approximate lattice energy of CaO is

Calculate the number of FeSO4.7H2O formula units in 0.5 millimoles of pure FeSO4.7H2O.

A transmitting antenna is at a height of 40 m and the receiving antenna is at a height of 60 m. The maximum distance between them for satisfactory communication is nearly

Veronal and luminal are derivatives of barbituric acid which are ......... (a) tranquilizers (b) non-narcotic analgesic (c) anti-allergic drugs (d) neurologically active drugs

Novalgin is a common:

A standard hydrogen electrode has zero electrode potential because

Arrange the following complex ions in increasing order of crystal field splitting energy △0. [Cr(Cl)6]3−,[Cr(CN)6]3−,[Cr(NH3)6]3+

Which among the following does not exist:-

When 0.5 mols of colemanite (Ca2B6O11) is treated with SO2 in aqueous solution to form orthoboric acid, how many grams of orthoboric acid will be formed? (Take molar mass of boron 11 gm/mol, oxygen 16 gm/mol)

An automobile antifreeze consists of 38.7% C, 9.7% H and the remaining oxygen by weight. when 0.093 g of it are vaporized at STP 33.6 mL of vapor are formed. The molecular formula of the antifreeze is:

Calculate the volume occupied by 8.8 g of CO2 at 31.1∘C and 1 bar pressure. R=0.083 bar LK−1 mol−1 .

IUPAC name of Na3[Co(NO2)6] is

One litre of 2M acetic acid is mixed with one litre of 2M ethyl alcohol to form ester as CH3COOH+C2H5OH→CH3COOC2H5+H2O The decrease in initial reaction rate if each solution is diluted by an equal volume of water would be

If 6m=46656, what is the value of 6m−2?

All the following statements are false except:

Which of the following doesn’t react with NaHSO3?

What is the mass of glucose required to produce 44g of CO2 on complete combustion?

Which of the following cannot undergo disproportionation?

The calomel electrode is reversible with respect to

The units of molarity is

Pure benzene freezes at 5.45ºC but a 0.374 m solution of tetrachloroethane in benzene freezes at 3.55ºC. The Kf for benzene is:

The de-Broglie wavelength associated with a ball of mass 1kg having kinetic energy 0.5 J is

Carbon−60 Contains :

Ethyl phenyl ether on boiling with conc. HBr gives

H2S is bubbled into 0.2M NaCN solution which is 0.02 M in each [Cd(CN)4]2−and[Ag(CN)2]−. The H2S produces 1×10−9 M sulphide in the solution. (Given, KspAg2S=1×10−50M3;KspCdS=7.1×10−28M2Kinst[Ag(CN)2]−1=1×10−20M2Kinst[Cd(CN)4]−2=7.8×10−18M4) Identify the correct statement

In which one of the following case breaking of covalent bond takes place?

Explain the reason for the fusion of an organic compound with metallic sodium for testing nitrogen, sulphur and halogens.

Match the items of Column I with the items of Column II and assign the correct code. Column IColumn IIA. Sapphire1. Al2O3B. Sphalerite2. NaCNC. Depressant3. CoD. Corundum4. ZnS5. Fe2O3 Codes A B C D A B C D (a) 3 4 2 1 (b) 5 4 3 2 (c) 2 3 4 5 (d) 1 2 3 4

A neutral atom will have the lowest ionization potential when electronic configuration is:-

Which of the following sets has all the species that do not follow octet rule?

The major product of the reaction of 2-butene with alkaline KMnO4 solution is

The functional group present in a molecule having the formula C12O9 is

Consider the following reaction and choose the correct option(s).

Which of the following reagents could be used to distinguish between butanone and tert-butyl alcohol?

(a) Name the method of refining which is (i) Used to obtain semiconductor of high purity. (ii) Used to obtain low boiling metal. (b) Write chemical reactions taking place in the extraction of copper from Cu2S.

The reaction, MgO(s)+C(s)→Mg(s)+CO(g), For which △rHo=+491.1kJ mol−1and△rS∘=198.0JK−1mol−1 is not feasible at 298 K. Temperature above which reaction will be feasible is

Which out of the following is not aromatic compounds?

The lattice energy order for lithium halides is:

Question 45 Predict the hybridisation of each carbon in the molecule of organic compound given below. Also indicate the total number of sigma and pi-bonds in this molecule.