46295 + Interview Questions in Chemistry

1.	Identify the tautmeric pair among the following
Answer» Identify the tautmeric pair among the following

Discussion

2.	The number of d-electrons in Fe2+ (Z = 26) is not equal to that of:
Answer» The number of d-electrons in $F e^{2 +}$ (Z = 26) is not equal to that of:

Discussion

3.	In which of the following reaction reactant and products are incorrectly matched?
Answer» In which of the following reaction reactant and products are incorrectly matched?

Discussion

4.	Internal energy and pressure for unit volume of gas are related by A.)P=2/3E. B.)P=3/2E. C.)P=1/3E. D.)P=2E
Answer» Internal energy and pressure for unit volume of gas are related by A.)P=2/3E. B.)P=3/2E. C.)P=1/3E. D.)P=2E

4.

Internal energy and pressure for unit volume of gas are related by A.)P=2/3E. B.)P=3/2E. C.)P=1/3E. D.)P=2E

Answer»

Internal energy and pressure for unit volume of gas are related by

A.)P=2/3E. B.)P=3/2E. C.)P=1/3E. D.)P=2E

Discussion

5.	The equation MnO−4(aq)+Br−(aq)→MnO2(s)+BrO−3(aq) when balanced in a basic medium by oxidation number method will be :
Answer» The equation $M n O_{4}^{-} (a q) + B r^{-} (a q) \to M n O_{2} (s) + B r O_{3}^{-} (a q)$ when balanced in a basic medium by oxidation number method will be :

Discussion

6.	Which of the following are correctly named according to the IUPAC convention?
Answer» Which of the following are correctly named according to the IUPAC convention?

Discussion

7.	Which of the following have identical bond order ?
Answer» Which of the following have identical bond order ?

Discussion

8.	Which is more ionic Licl or Nacl?Why?
Answer» Which is more ionic Licl or Nacl?Why?

Discussion

9.	What will be the oxidation state of P in K4P2O7 :
Answer» What will be the oxidation state of $P$ in $K_{4} P_{2} O_{7}$ :

Discussion

10.	Balloon of 4L capacity are to be filled with hydrogen at a pressure of 1 atm and 27°C from an 8L cylinder containing hydrogen at 10 atm at the same temperature.the number of balloons that can be filled is 1) 20 2)18 3) 40 4)38
Answer» Balloon of 4L capacity are to be filled with hydrogen at a pressure of 1 atm and 27°C from an 8L cylinder containing hydrogen at 10 atm at the same temperature.the number of balloons that can be filled is 1) 20 2)18 3) 40 4)38

Discussion

11.	The heat of formation of C2H5OH(l) is −66 kcal mol−1. The heat of combustion of CH3OCH3 (g) is −348 kcal mol−1. △Hf for H2O and CO2 are −68 kcal mol−1 and −94 kcal mol−1 respectively. Then, the △H for the reaction C2H5OH(l)→CH3OCH3(g) is:
Answer» The heat of formation of $C_{2} H_{5} O H (l)$ is $- 66 k c a l m o l^{- 1}$ . The heat of combustion of $C H_{3} O C H_{3} (g)$ is $- 348 k c a l m o l^{- 1}$ . $△ H_{f}$ for $H_{2} O$ and $C O_{2}$ are $- 68 k c a l m o l^{- 1}$ and $- 94 k c a l m o l^{- 1}$ respectively. Then, the $△ H$ for the reaction $C_{2} H_{5} O H (l) \to C H_{3} O C H_{3} (g)$ is:

Discussion

12.	Ax+ has 4 protons, 5 neutrons and e/m value of 2.12×107 C kg−1. Find the value of x.
Answer» $A^{x +}$ has $4$ protons, $5$ neutrons and $e / m$ value of $2.12 \times 10^{7} {C kg}^{- 1}$ . Find the value of $x$ .

Discussion

13.	How to find a valency of the given element if the atomic number is given?
Answer» How to find a valency of the given element if the atomic number is given?

Discussion

14.	Which one of the following combinations illustrate the law of reciprocal proportions?
Answer» Which one of the following combinations illustrate the law of reciprocal proportions?

Discussion

15.	The conditions required to maximize the yield of ammonia are:
Answer» The conditions required to maximize the yield of ammonia are:

Discussion

16.	If an endothermic reaction is non spontaneous, then
Answer» If an endothermic reaction is non spontaneous, then

Discussion

17.	How to remember all organic chemistry reactions?
Answer» How to remember all organic chemistry reactions?

Discussion

18.	Where is sulphapyridine used?
Answer» Where is sulphapyridine used?

Discussion

19.	For the reaction, 2NH3(g)⇌N2(g)+3H2(g), the units of Kp will be.
Answer» For the reaction, $2 N H_{3} (g) ⇌ N_{2} (g) + 3 H_{2} (g),$ the units of $K_{p}$ will be.

Discussion

20.	By heating 10g of CaCO3, 5.6g of CaO is formed. What is the moles of CO2 obtained in this reaction?
Answer» By heating 10g of $C a C O_{3}$ , 5.6g of CaO is formed. What is the moles of $C O_{2}$ obtained in this reaction?

Discussion

21.	In an irreversible process taking place at constant T and P and in which only PV work is being done, the change in free energy (dG) and change in entropy (dS) satisfy the criteria:
Answer» In an irreversible process taking place at constant T and P and in which only PV work is being done, the change in free energy (dG) and change in entropy (dS) satisfy the criteria:

Discussion

22.	Identify the major products P,Q,R in the following sequence of reactions : Benzene + Propyl Chloride ----Anhydrous AlCl3---> P P-----(i)O2/(ii)H3O+------>Q + R.
Answer» Identify the major products P,Q,R in the following sequence of reactions : Benzene + Propyl Chloride ----Anhydrous AlCl₃---> P P-----(i)O₂/(ii)H₃O⁺------>Q + R.

22.

Identify the major products P,Q,R in the following sequence of reactions : Benzene + Propyl Chloride ----Anhydrous AlCl3---> P P-----(i)O2/(ii)H3O+------>Q + R.

Answer»

Identify the major products P,Q,R in the following sequence of reactions :

Benzene + Propyl Chloride ----Anhydrous AlCl₃---> P

P-----(i)O₂/(ii)H₃O⁺------>Q + R.

Discussion

23.	Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040 (density of water = 1)
Answer» Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040 (density of water = 1)

Discussion

24.	Which of the following orbital will be filled first?
Answer» Which of the following orbital will be filled first?

Discussion

25.	Anti oxidents are micro or macro nutrient ?
Answer» Anti oxidents are micro or macro nutrient ?

Discussion

26.	The edge lengths of the unit cells in terms of the radius of sphere constituting fcc, bcc and simple cubic unit cells are respectively ....... (a)2√2r,4r√3,2r (b) 4r√3,2√2r,2r (c)2r,2√2r,4r√3 (d) 2r,4r√3,2√2r
Answer» The edge lengths of the unit cells in terms of the radius of sphere constituting fcc, bcc and simple cubic unit cells are respectively ....... (a) $2 \sqrt{2 r}, \frac{4 r}{\sqrt{3}}, 2 r$ (b) $\frac{4 r}{\sqrt{3}}, 2 \sqrt{2 r}, 2 r$ (c) $2 r, 2 \sqrt{2 r}, \frac{4 r}{\sqrt{3}}$ (d) $2 r, \frac{4 r}{\sqrt{3}}, 2 \sqrt{2 r}$

26.

The edge lengths of the unit cells in terms of the radius of sphere constituting fcc, bcc and simple cubic unit cells are respectively ....... (a)2√2r,4r√3,2r (b) 4r√3,2√2r,2r (c)2r,2√2r,4r√3 (d) 2r,4r√3,2√2r

Answer»

The edge lengths of the unit cells in terms of the radius of sphere constituting fcc, bcc and simple cubic unit cells are respectively .......

(a) $2 \sqrt{2 r}, \frac{4 r}{\sqrt{3}}, 2 r$ (b) $\frac{4 r}{\sqrt{3}}, 2 \sqrt{2 r}, 2 r$

(c) $2 r, 2 \sqrt{2 r}, \frac{4 r}{\sqrt{3}}$ (d) $2 r, \frac{4 r}{\sqrt{3}}, 2 \sqrt{2 r}$

Discussion

27.	Write the IUPAC name of the following compound
Answer» Write the IUPAC name of the following compound

Discussion

28.	What is the mass percentage of carbon in urea [CO(NH2)2]? (Molar mass of urea is 60g)
Answer» What is the mass percentage of carbon in urea [CO(NH₂)₂]? (Molar mass of urea is 60g)

Discussion

29.	Among the following the total no. of species which are paramagnetic O2,S2,CN−,NO+,O2+2,O2−2,B2,N2−2,O+2,NO,NO2,N2O___
Answer» Among the following the total no. of species which are paramagnetic $O_{2}, S_{2}, C N^{-}, N O^{+}, O_{2}^{2 +}, O_{2}^{2 -}, B_{2}, N_{2}^{2 -}, O_{2}^{+}, N O, N O_{2}, N_{2} O$ ___

29.

Among the following the total no. of species which are paramagnetic O2,S2,CN−,NO+,O2+2,O2−2,B2,N2−2,O+2,NO,NO2,N2O___

Answer»

Among the following the total no. of species which are paramagnetic

$O_{2}, S_{2}, C N^{-}, N O^{+}, O_{2}^{2 +}, O_{2}^{2 -}, B_{2}, N_{2}^{2 -}, O_{2}^{+}, N O, N O_{2}, N_{2} O$ ___

Discussion

30.	Light of wavelength λ shines on a metal surface with intensity X, and the metal emits Y electrons per second of average energy Z. What will happen to Y and Z If X is doubled?
Answer» Light of wavelength $λ$ shines on a metal surface with intensity X, and the metal emits Y electrons per second of average energy Z. What will happen to Y and Z If X is doubled?

Discussion

31.	A sample of vitamin C is known to contain 2.58 × 1024 oxygen atoms. a) How many moles of oxygen atoms are present in the sample? b) Find moles of oxygen molecules present in the sample.
Answer» A sample of vitamin C is known to contain 2.58 × 10²⁴ oxygen atoms. a) How many moles of oxygen atoms are present in the sample? b) Find moles of oxygen molecules present in the sample.

Discussion

32.	In the reaction for formation of chloride ion, when we add 2HCO3 + MgSO4 we are getting MGCO3 + H2SO4 . this equation is not getting balanced
Answer» In the reaction for formation of chloride ion, when we add 2HCO3 + MgSO4 we are getting MGCO3 + H2SO4 . this equation is not getting balanced

Discussion

33.	The total number of possible stereoisomers for [Pd(NH2−CH(CH3)−CO−2)2]0 is:
Answer» The total number of possible stereoisomers for $[P d (N H_{2} - C H (C H_{3}) - C O_{2}^{-})_{2}]^{0}$ is:

Discussion

34.	Which of the following is NOT a molecular solid?
Answer» Which of the following is NOT a molecular solid?

Discussion

35.	Aldopentoses named as ribose and 2-deoxyribose are found in nucleic acids. What is their relative configuration?
Answer» Aldopentoses named as ribose and 2-deoxyribose are found in nucleic acids. What is their relative configuration?

Discussion

36.	Write the chemical equation when aluminum chloride dissolve in dil HCl
Answer» Write the chemical equation when aluminum chloride dissolve in dil HCl

Discussion

37.	A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because .......... (a) all the domains get oriented in the direction of a magnetic field (b) all the domains get oriented in the direction opposite to the direction of a magnetic field (c) domains get oriented randomly (d) domains are not affected by a magnetic field
Answer» A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because .......... (a) all the domains get oriented in the direction of a magnetic field (b) all the domains get oriented in the direction opposite to the direction of a magnetic field (c) domains get oriented randomly (d) domains are not affected by a magnetic field

37.

A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because .......... (a) all the domains get oriented in the direction of a magnetic field (b) all the domains get oriented in the direction opposite to the direction of a magnetic field (c) domains get oriented randomly (d) domains are not affected by a magnetic field

Answer»

A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because ..........

(a) all the domains get oriented in the direction of a magnetic field

(b) all the domains get oriented in the direction opposite to the direction of a magnetic field

(c) domains get oriented randomly

(d) domains are not affected by a magnetic field

Discussion

38.	Q factor is
Answer» Q factor is

Discussion

39.	Nitric acid is the most important oxi-acid formed by nitrogen. It is one of the major industrial chemicals and is widely used. Nitric acid is manufactured by the catalytic oxidation of ammonia that is known as Ostwald Process which can be represented by sequence of reactions shown below 4NH3+5O2(g)Catalyst−−−−−→Pt/Rh4NO(g)+6H2O(g) ...(i) 2NO(g)+O2(g)1120 K−−−−→2NO2(g) ...(ii) 3NO2(g)+H2O(l)→2HNO3(aq)+NO(g) ...(iii) The aqueous nitric acid obtained by this method can be concenteated by distillation to 68.5% by weight. Further concentration to 98% acid can be achieved by dehydration with concentrated sulphuric acid. If 180 L of water completely reacts with NO2 produced to form nitric acid according to the above reactions, then the volume of air required at STP containing 20% of NO2 is: (density of water is 1 g/mL)
Answer» Nitric acid is the most important oxi-acid formed by nitrogen. It is one of the major industrial chemicals and is widely used. Nitric acid is manufactured by the catalytic oxidation of ammonia that is known as Ostwald Process which can be represented by sequence of reactions shown below $4 N H_{3} + 5 O_{2} (g) C a t a l y s t - ---- \to P t / R h 4 N O (g) + 6 H_{2} O (g) . . . (i)$ $2 N O (g) + O_{2} (g) 1120 K - --- \to 2 N O_{2} (g) . . . (i i)$ $3 N O_{2} (g) + H_{2} O (l) \to 2 H N O_{3} (a q) + N O (g) . . . (i i i)$ The aqueous nitric acid obtained by this method can be concenteated by distillation to $68.5 %$ by weight. Further concentration to $98 %$ acid can be achieved by dehydration with concentrated sulphuric acid. If $180 L$ of water completely reacts with $N O_{2}$ produced to form nitric acid according to the above reactions, then the volume of air required at STP containing $20 %$ of $N O_{2}$ is: (density of water is 1 g/mL)

Discussion

40.	Chemisorption
Answer» Chemisorption

Discussion

41.	If 4s orbital donates its electron to 3d orbital because there was one room empty. Then why does it not do the same for other elements?
Answer» If 4s orbital donates its electron to 3d orbital because there was one room empty. Then why does it not do the same for other elements?

Discussion

42.	Which of the following halides will be most reactive in SN2 reaction and SN1 reaction, respectively?
Answer» Which of the following halides will be most reactive in $S N^{2}$ reaction and $S N^{1}$ reaction, respectively?

Discussion

43.	The geometrical isomerism is shown by
Answer» The geometrical isomerism is shown by

Discussion

44.	The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decrease in which of the following orders?
Answer» The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decrease in which of the following orders?

Discussion

45.	Similar to electron diffraction, neutron diffraction microscope is also used for the determination of the structure of molecules. If the wavelength used here is 800 pm, calculate the characteristic velocity associated with the neutron.
Answer» Similar to electron diffraction, neutron diffraction microscope is also used for the determination of the structure of molecules. If the wavelength used here is 800 pm, calculate the characteristic velocity associated with the neutron.

Discussion

46.	How does the atomic hydrogen torch function for cutting and welding purposes? Explain.
Answer» How does the atomic hydrogen torch function for cutting and welding purposes? Explain.

Discussion

47.	Estrerification of terephthalic acid with glycol produces.
Answer» Estrerification of terephthalic acid with glycol produces.

Discussion

48.	Sodium acetate can be converted to ethane by
Answer» Sodium acetate can be converted to ethane by

Discussion

49.	A cup of tea cools from 80o C to 60o C in one minute. The ambient temperature is 30o C. In cooling from 60o C to 50o C it will take
Answer» A cup of tea cools from $80^{o} C$ to $60^{o} C$ in one minute. The ambient temperature is $30^{o} C$ . In cooling from $60^{o} C$ to $50^{o} C$ it will take

Discussion

50.	The charge required for the reduction of 1 mole of Cr2O2−7 to Cr3+ is
Answer» The charge required for the reduction of 1 mole of $C r_{2} O_{7}^{2 -}$ to $C r^{3 +}$ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Identify the tautmeric pair among the following

The number of d-electrons in Fe2+ (Z = 26) is not equal to that of:

In which of the following reaction reactant and products are incorrectly matched?

Internal energy and pressure for unit volume of gas are related by A.)P=2/3E. B.)P=3/2E. C.)P=1/3E. D.)P=2E

The equation MnO−4(aq)+Br−(aq)→MnO2(s)+BrO−3(aq) when balanced in a basic medium by oxidation number method will be :

Which of the following are correctly named according to the IUPAC convention?

Which of the following have identical bond order ?

Which is more ionic Licl or Nacl?Why?

What will be the oxidation state of P in K4P2O7 :

Balloon of 4L capacity are to be filled with hydrogen at a pressure of 1 atm and 27°C from an 8L cylinder containing hydrogen at 10 atm at the same temperature.the number of balloons that can be filled is 1) 20 2)18 3) 40 4)38

The heat of formation of C2H5OH(l) is −66 kcal mol−1. The heat of combustion of CH3OCH3 (g) is −348 kcal mol−1. △Hf for H2O and CO2 are −68 kcal mol−1 and −94 kcal mol−1 respectively. Then, the △H for the reaction C2H5OH(l)→CH3OCH3(g) is:

Ax+ has 4 protons, 5 neutrons and e/m value of 2.12×107 C kg−1. Find the value of x.

How to find a valency of the given element if the atomic number is given?

Which one of the following combinations illustrate the law of reciprocal proportions?

The conditions required to maximize the yield of ammonia are:

If an endothermic reaction is non spontaneous, then

How to remember all organic chemistry reactions?

Where is sulphapyridine used?

For the reaction, 2NH3(g)⇌N2(g)+3H2(g), the units of Kp will be.

By heating 10g of CaCO3, 5.6g of CaO is formed. What is the moles of CO2 obtained in this reaction?

In an irreversible process taking place at constant T and P and in which only PV work is being done, the change in free energy (dG) and change in entropy (dS) satisfy the criteria:

Identify the major products P,Q,R in the following sequence of reactions : Benzene + Propyl Chloride ----Anhydrous AlCl3---&gt; P P-----(i)O2/(ii)H3O+------&gt;Q + R.

Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040 (density of water = 1)

Which of the following orbital will be filled first?

Anti oxidents are micro or macro nutrient ?

The edge lengths of the unit cells in terms of the radius of sphere constituting fcc, bcc and simple cubic unit cells are respectively ....... (a)2√2r,4r√3,2r (b) 4r√3,2√2r,2r (c)2r,2√2r,4r√3 (d) 2r,4r√3,2√2r

Write the IUPAC name of the following compound

What is the mass percentage of carbon in urea [CO(NH2)2]? (Molar mass of urea is 60g)

Among the following the total no. of species which are paramagnetic O2,S2,CN−,NO+,O2+2,O2−2,B2,N2−2,O+2,NO,NO2,N2O___

Light of wavelength λ shines on a metal surface with intensity X, and the metal emits Y electrons per second of average energy Z. What will happen to Y and Z If X is doubled?

A sample of vitamin C is known to contain 2.58 × 1024 oxygen atoms. a) How many moles of oxygen atoms are present in the sample? b) Find moles of oxygen molecules present in the sample.

In the reaction for formation of chloride ion, when we add 2HCO3 + MgSO4 we are getting MGCO3 + H2SO4 . this equation is not getting balanced

The total number of possible stereoisomers for [Pd(NH2−CH(CH3)−CO−2)2]0 is:

Which of the following is NOT a molecular solid?

Aldopentoses named as ribose and 2-deoxyribose are found in nucleic acids. What is their relative configuration?

Write the chemical equation when aluminum chloride dissolve in dil HCl

Q factor is

Chemisorption

If 4s orbital donates its electron to 3d orbital because there was one room empty. Then why does it not do the same for other elements?

Which of the following halides will be most reactive in SN2 reaction and SN1 reaction, respectively?

The geometrical isomerism is shown by

The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decrease in which of the following orders?

Similar to electron diffraction, neutron diffraction microscope is also used for the determination of the structure of molecules. If the wavelength used here is 800 pm, calculate the characteristic velocity associated with the neutron.

How does the atomic hydrogen torch function for cutting and welding purposes? Explain.

Estrerification of terephthalic acid with glycol produces.

Sodium acetate can be converted to ethane by

A cup of tea cools from 80o C to 60o C in one minute. The ambient temperature is 30o C. In cooling from 60o C to 50o C it will take

The charge required for the reduction of 1 mole of Cr2O2−7 to Cr3+ is

Identify the major products P,Q,R in the following sequence of reactions : Benzene + Propyl Chloride ----Anhydrous AlCl3---> P P-----(i)O2/(ii)H3O+------>Q + R.