46295 + Interview Questions in Chemistry

1.	What is the empirical formula of vanadium oxide, if 2.74 g of the metal oxide contains 1.53 g of metal?
Answer» What is the empirical formula of vanadium oxide, if $2.74 g$ of the metal oxide contains $1.53 g$ of metal?

Discussion

2.	Column I contains a list of processes involving expansion of an ideal gas. Match this with column II, describing the thermodynamic change during this process.
Answer» Column I contains a list of processes involving expansion of an ideal gas. Match this with column II, describing the thermodynamic change during this process.

Discussion

3.	The vapour pressure of the solution of two liquids A(p∘=80mm) and B(p∘=120mm) is found to be 100 mm when XA = 0.4. The result shows that
Answer» The vapour pressure of the solution of two liquids $A (p^{\circ} = 80 m m)$ and $B (p^{\circ} = 120 m m)$ is found to be 100 mm when $X_{A}$ = 0.4. The result shows that

Discussion

4.	How calcination proceeds in limited amount of oxygen supply ? What if the supply of oxygen is completely exhausted ?
Answer» How calcination proceeds in limited amount of oxygen supply ? What if the supply of oxygen is completely exhausted ?

Discussion

5.	Which is not an ore of iron?
Answer» Which is not an ore of iron?

Discussion

6.	Some of the Group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides, the one which is soluble in ethanol is:
Answer» Some of the Group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides, the one which is soluble in ethanol is:

Discussion

7.	A 2 g sample containing Na2CO3 and NaHCO3 loses 0.62 g when heated to 300 oC, the temperature at which NaHCO3 decomposes to Na2CO3, CO2 and H2O. What is the percentage of Na2CO3 in the given mixture.
Answer» A 2 g sample containing $N a_{2} C O_{3}$ and $N a H C O_{3}$ loses 0.62 g when heated to $300^{o} C,$ the temperature at which $N a H C O_{3}$ decomposes to $N a_{2} C O_{3}, C O_{2}$ and $H_{2} O .$ What is the percentage of $N a_{2} C O_{3}$ in the given mixture.

Discussion

8.	Ferrimagnetism is in
Answer» Ferrimagnetism is in

Discussion

9.	Difference between Schottky defect and Frenkel defect.
Answer» Difference between Schottky defect and Frenkel defect.

Discussion

10.	Which one of the following orders correctly represents the increasing acid strengths of the given acids?
Answer» Which one of the following orders correctly represents the increasing acid strengths of the given acids?

Discussion

11.	Tollen’s reagent is used for the detection of aldehyde, when a solution of AgNO3 is added to glucose with NH4OH then gluconic acid is formed. Ag++e−→Ag; E∘red=0.8V C6H12O6+H2O→C6H12O7 (Gluconic acid) +2H++2e;E∘oxd=−0.05V Ag(NH3)+2+e−→Ag(S)+2NH3;E∘=–0.337V [Use 2.303×RTF=0.0592 and FRT=38.92 at 298 K] (i) 2Ag++C6H12O6+H2O→2Ag(s)+C6H12O7+2H+. Find ln K of this reaction.
Answer» Tollen’s reagent is used for the detection of aldehyde, when a solution of $A g N O_{3}$ is added to glucose with $N H_{4} O H$ then gluconic acid is formed. $A g^{+} + e^{-} \to A g;$ $E_{r e d}^{\circ} = 0.8 V$ $C_{6} H_{12} O_{6} + H_{2} O \to C_{6} H_{12} O_{7}$ (Gluconic acid) $+ 2 H^{+} + 2 e; E_{o x d}^{\circ} = - 0.05 V$ $A g (N H_{3})_{2}^{+} + e^{-} \to A g (S) + 2 N H_{3}; E^{\circ} = - 0.337 V$ [Use $2.303 \times \frac{R T}{F} = 0.0592$ and $\frac{F}{R T} = 38.92$ at 298 K] (i) $2 A g^{+} + C_{6} H_{12} O_{6} + H_{2} O \to 2 A g (s) + C_{6} H_{12} O_{7} + 2 H^{+}$ . Find ln K of this reaction.

11.

Tollen’s reagent is used for the detection of aldehyde, when a solution of AgNO3 is added to glucose with NH4OH then gluconic acid is formed. Ag++e−→Ag; E∘red=0.8V C6H12O6+H2O→C6H12O7 (Gluconic acid) +2H++2e;E∘oxd=−0.05V Ag(NH3)+2+e−→Ag(S)+2NH3;E∘=–0.337V [Use 2.303×RTF=0.0592 and FRT=38.92 at 298 K] (i) 2Ag++C6H12O6+H2O→2Ag(s)+C6H12O7+2H+. Find ln K of this reaction.

Answer»

Tollen’s reagent is used for the detection of aldehyde, when a solution of $A g N O_{3}$ is added to glucose with $N H_{4} O H$ then gluconic acid is formed.

$A g^{+} + e^{-} \to A g;$ $E_{r e d}^{\circ} = 0.8 V$

$C_{6} H_{12} O_{6} + H_{2} O \to C_{6} H_{12} O_{7}$ (Gluconic acid) $+ 2 H^{+} + 2 e; E_{o x d}^{\circ} = - 0.05 V$

$A g (N H_{3})_{2}^{+} + e^{-} \to A g (S) + 2 N H_{3}; E^{\circ} = - 0.337 V$

[Use $2.303 \times \frac{R T}{F} = 0.0592$ and $\frac{F}{R T} = 38.92$ at 298 K]

(i) $2 A g^{+} + C_{6} H_{12} O_{6} + H_{2} O \to 2 A g (s) + C_{6} H_{12} O_{7} + 2 H^{+}$ . Find ln K of this reaction.

Discussion

12.	Intermolecular forces of attraction in NaCl is __than water.
Answer» Intermolecular forces of attraction in NaCl is __than water.

Discussion

13.	How to convert 0.0230554 Kelvin in to joules
Answer» How to convert 0.0230554 Kelvin in to joules

Discussion

14.	In which of the following pairs, the difference between the covalent radii of two metals is maximum?
Answer» In which of the following pairs, the difference between the covalent radii of two metals is maximum?

Discussion

15.	A welding fuel gas combines carbon and Hydrogen only. On burning it gives 3.38g of CO2 and 0.690g of water and no other products. A volume of 10L (STP) of this gas found to weigh 11.6g. Calculate empirical formula.
Answer» A welding fuel gas combines carbon and Hydrogen only. On burning it gives 3.38g of CO2 and 0.690g of water and no other products. A volume of 10L (STP) of this gas found to weigh 11.6g. Calculate empirical formula.

Discussion

16.	Given below are the half-cell reaction: Mn2++2e⊖→Mn; E⊖=−1.18V 2(Mn3++e⊖→Mn2+; E⊖=+1.51V The E⊖ for 3Mn2+→Mn+2Mn3+ will be: (IIT-JEE 2014)
Answer» Given below are the half-cell reaction: $M n^{2 +} + 2 e^{⊖} \to M n; E^{⊖} = - 1.18 V$ $2 (M n^{3 +} + e^{⊖} \to M n^{2 +}; E^{⊖} = + 1.51 V$ The $E^{⊖}$ for $3 M n^{2 +} \to M n + 2 M n^{3 +}$ will be: (IIT-JEE 2014)

Discussion

17.	The molecule which has zero dipole moment is:
Answer» The molecule which has zero dipole moment is:

Discussion

18.	Three photons coming from excited Atomic hydrogen sample are picked up. their energies are 12.1eV,10.2eV ,1.9eV. these photons must come from
Answer» Three photons coming from excited Atomic hydrogen sample are picked up. their energies are 12.1eV,10.2eV ,1.9eV. these photons must come from

Discussion

19.	Ethyl chloride (C2H5Cl), is prepared by reaction of ethylene with hydrogen chloride : C2H4(g)+HCl(g)→C2H5Cl(g) ΔH=−72.3kJ. What is the value of △E (in KJ), if 70g of ethylene and 73g of HCL are allowed to react at 300K.
Answer» Ethyl chloride $(C_{2} H_{5} C l)$ , is prepared by reaction of ethylene with hydrogen chloride : $C_{2} H_{4} (g) + H C l (g) \to C_{2} H_{5} C l (g) Δ H = - 72.3 k J$ . What is the value of $△ E$ (in KJ), if 70g of ethylene and 73g of HCL are allowed to react at 300K.

19.

Ethyl chloride (C2H5Cl), is prepared by reaction of ethylene with hydrogen chloride : C2H4(g)+HCl(g)→C2H5Cl(g) ΔH=−72.3kJ. What is the value of △E (in KJ), if 70g of ethylene and 73g of HCL are allowed to react at 300K.

Answer»

Ethyl chloride $(C_{2} H_{5} C l)$ , is prepared by reaction of ethylene with hydrogen chloride :

$C_{2} H_{4} (g) + H C l (g) \to C_{2} H_{5} C l (g) Δ H = - 72.3 k J$ . What is the value of $△ E$ (in KJ), if 70g of ethylene and 73g of HCL are allowed to react at 300K.

Discussion

20.	Which of the following has highest electron affinity?
Answer» Which of the following has highest electron affinity?

Discussion

21.	A spectral line in the spectrum of H atom has a wavenumber of 15222.22 cm−1 . The transition responsible for this radiation is (Rydberg constant R = 109677 cm−1)
Answer» A spectral line in the spectrum of H atom has a wavenumber of $15222.22 c m^{- 1}$ . The transition responsible for this radiation is (Rydberg constant $R = 109677 c m^{- 1}$ )

Discussion

22.	Consider a sparingly soluble salt (AB) with concentration C1 and highly soluble salt (AX) with concentration C2. Then which of the following relation holds true? (Assume Ksp(AB)<<10−3)
Answer» Consider a sparingly soluble salt $(A B)$ with concentration $C_{1}$ and highly soluble salt $(A X)$ with concentration $C_{2}$ . Then which of the following relation holds true? (Assume $K_{s p} (A B) << 10^{- 3}$ )

Discussion

23.	Angular momentum of an electron in Bohr's orbit of hydrogen atom is 4.22 * 10-34 kg m2 s-1. Calculate the wavelength of the spectral line when the electron Falls from this level to the next lower level.
Answer» Angular momentum of an electron in Bohr's orbit of hydrogen atom is 4.22 * 10^-34kg m²s^-1. Calculate the wavelength of the spectral line when the electron Falls from this level to the next lower level.

Discussion

24.	For the following reaction Cdiamond + O2 → CO2(g); ΔH = −94.3kcal Cgraphite + O2 → CO2(g);ΔH = −97.6kcal The heat required to change 1 g of Cdiamond → Cgraphite is
Answer» For the following reaction $C_{d i a m o n d} + O_{2} \to C O_{2} (g)$ ; $Δ H = - 94.3 k c a l$ $C_{g r a p h i t e} + O_{2} \to C O_{2} (g)$ ; $Δ H = - 97.6 k c a l$ The heat required to change 1 g of $C_{d i a m o n d} \to C_{g r a p h i t e}$ is

24.

For the following reaction Cdiamond + O2 → CO2(g); ΔH = −94.3kcal Cgraphite + O2 → CO2(g);ΔH = −97.6kcal The heat required to change 1 g of Cdiamond → Cgraphite is

Answer»

For the following reaction

$C_{d i a m o n d} + O_{2} \to C O_{2} (g)$ ; $Δ H = - 94.3 k c a l$

$C_{g r a p h i t e} + O_{2} \to C O_{2} (g)$ ; $Δ H = - 97.6 k c a l$

The heat required to change 1 g of $C_{d i a m o n d} \to C_{g r a p h i t e}$ is

Discussion

25.	Why there is not jee main and advance 2018 solution? The last are of 2015. Seriously......?
Answer» Why there is not jee main and advance 2018 solution? The last are of 2015. Seriously......?

Discussion

26.	What is 'A' in the following reaction?
Answer» What is 'A' in the following reaction?

26.

What is 'A' in the following reaction?

Answer»

What is 'A' in the following reaction?

Discussion

27.	Is it necessary to have even number of electrons in Nernst equation or it's just a pure coincidence with NCERT questions?
Answer» Is it necessary to have even number of electrons in Nernst equation or it's just a pure coincidence with NCERT questions?

Discussion

28.	The reaction of C6H5CH=CHCH3 with HBr produces :
Answer» The reaction of $C_{6} H_{5} C H = C H C H_{3}$ with HBr produces :

Discussion

29.	A solution is prepared by adding 2 g of a substance A to 18 g of water. Mass percent of solute A will be:
Answer» A solution is prepared by adding 2 g of a substance A to 18 g of water. Mass percent of solute A will be:

Discussion

30.	Can phosphorus with outer electronic configuration 3s2, 3p3 form PH5?
Answer» Can phosphorus with outer electronic configuration 3s2, 3p3 form PH5?

Discussion

31.	An aquase solution of 2% non volatile solute exerts a pressure of 1.004 bar at normal boiling point of solvent. What is the molecular mass of solute (vapour pressure of pure water is 1.013bar
Answer» An aquase solution of 2% non volatile solute exerts a pressure of 1.004 bar at normal boiling point of solvent. What is the molecular mass of solute (vapour pressure of pure water is 1.013bar

Discussion

32.	Wurtz reaction fails in case of tert-alkyl halides. Why?
Answer» Wurtz reaction fails in case of tert-alkyl halides. Why?

Discussion

33.	Which one of the following compounds is most acidic? a- ClCH2CH2OH. b- phenol. c- Ortho nitro phenol. d- Ortho cerosol. Please explain it to me
Answer» Which one of the following compounds is most acidic? a- ClCH2CH2OH. b- phenol. c- Ortho nitro phenol. d- Ortho cerosol. Please explain it to me

Discussion

34.	In the following reaction, The structure of the major product X is:
Answer» In the following reaction, The structure of the major product X is:

Discussion

35.	Which of the following is the correct order of size of the given species (a) I>I−>I+ (b) I+>I−I (c) I>I+>I− (d) I−>I>I+
Answer» Which of the following is the correct order of size of the given species (a) $I > I^{-} > I^{+}$ (b) $I^{+} > I^{-} I$ (c) $I > I^{+} > I^{-}$ (d) $I^{-} > I > I^{+}$

Discussion

36.	The following ether, when treated with HI produces –
Answer» The following ether, when treated with HI produces –

Discussion

37.	What is the IUPAC name of the compound shown below:
Answer» What is the IUPAC name of the compound shown below:

Discussion

38.	Allergy involves
Answer» Allergy involves

Discussion

39.	A metal block is placed in a room which is at 10∘C. It is heated by an electric heater of power 500 W till its temperature becomes 50∘C. Its initial rate of rise of temperature is 2.5∘C/sec. The heater is switched off and now a heater of 100 W is required to maintain the temperature of the block at 50∘C. (Assume Newton's Law of cooling to be valid). The rate of cooling in of the block at 50∘C after switching off the 100 W heater is −1n∘C/s, find n.
Answer» A metal block is placed in a room which is at $10^{\circ} C$ . It is heated by an electric heater of power $500 W$ till its temperature becomes $50^{\circ} C$ . Its initial rate of rise of temperature is ${2.5}^{\circ} C/sec$ . The heater is switched off and now a heater of $100 W$ is required to maintain the temperature of the block at $50^{\circ} C$ . (Assume Newton's Law of cooling to be valid). The rate of cooling in of the block at $50^{\circ} C$ after switching off the $100 W$ heater is ${\frac{- 1}{n}}^{\circ} C/s$ , find $n$ .

Discussion

40.	Find the number of molecules having two lone pair of electrons on central atom. I−3,XeF2,XeF4,H2O,NH−2H2S,H2SO4,NF3
Answer» Find the number of molecules having two lone pair of electrons on central atom. $I_{3}^{-}, X e F_{2}, X e F_{4}, H_{2} O, N H_{2}^{-} H_{2} S, H_{2} S O_{4}, N F_{3}$

Discussion

41.	Vermione and Larry were in a class. Teacher said: Absorption is a bulk phenomenon where molecules are distributed in the bulk of a substance. Larry: If I fill my bottle with water, it must be absorbing the water because it's in the bulk of the bottle. Vermione slapped Larry. Why did Vermione slap Larry?
Answer» Vermione and Larry were in a class. Teacher said: Absorption is a bulk phenomenon where molecules are distributed in the bulk of a substance. Larry: If I fill my bottle with water, it must be absorbing the water because it's in the bulk of the bottle. Vermione slapped Larry. Why did Vermione slap Larry?

Discussion

42.	Which of the following has maximum lattice energy?
Answer» Which of the following has maximum lattice energy?

Discussion

43.	Phenols are weaker acids than:
Answer» Phenols are weaker acids than:

Discussion

44.	Which of the following colligative property can provide molar mass of proteins ( or polymers or colloids) with greater precision?
Answer» Which of the following colligative property can provide molar mass of proteins ( or polymers or colloids) with greater precision?

Discussion

45.	How to balance a redox reaction
Answer» How to balance a redox reaction

Discussion

46.	What are glycosidic linkages? In which type of biomolecules are they present?
Answer» What are glycosidic linkages? In which type of biomolecules are they present?

Discussion

47.	Calculate the mass of urea ( NH2CONH2 ) required in making 2.5kg of 0.25m aqueous solution.
Answer» Calculate the mass of urea ( NH₂CONH₂ ) required in making 2.5kg of 0.25m aqueous solution.

Discussion

48.	Ionization energy of F− is 320KJ/mole. The electron gain enthalpy of fluorine would be
Answer» Ionization energy of $F^{-}$ is 320KJ/mole. The electron gain enthalpy of fluorine would be

Discussion

49.	Which of the following molecules will have smallest bond length?
Answer» Which of the following molecules will have smallest bond length?

Discussion

50.	Which of the following freezing systems is used for cooling biotechnology products?
Answer» Which of the following freezing systems is used for cooling biotechnology products?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the empirical formula of vanadium oxide, if 2.74 g of the metal oxide contains 1.53 g of metal?

Column I contains a list of processes involving expansion of an ideal gas. Match this with column II, describing the thermodynamic change during this process.

The vapour pressure of the solution of two liquids A(p∘=80mm) and B(p∘=120mm) is found to be 100 mm when XA = 0.4. The result shows that

How calcination proceeds in limited amount of oxygen supply ? What if the supply of oxygen is completely exhausted ?

Which is not an ore of iron?

Some of the Group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides, the one which is soluble in ethanol is:

A 2 g sample containing Na2CO3 and NaHCO3 loses 0.62 g when heated to 300 oC, the temperature at which NaHCO3 decomposes to Na2CO3, CO2 and H2O. What is the percentage of Na2CO3 in the given mixture.

Ferrimagnetism is in

Difference between Schottky defect and Frenkel defect.

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

Intermolecular forces of attraction in NaCl is __than water.

How to convert 0.0230554 Kelvin in to joules

In which of the following pairs, the difference between the covalent radii of two metals is maximum?

A welding fuel gas combines carbon and Hydrogen only. On burning it gives 3.38g of CO2 and 0.690g of water and no other products. A volume of 10L (STP) of this gas found to weigh 11.6g. Calculate empirical formula.

Given below are the half-cell reaction: Mn2++2e⊖→Mn; E⊖=−1.18V 2(Mn3++e⊖→Mn2+; E⊖=+1.51V The E⊖ for 3Mn2+→Mn+2Mn3+ will be: (IIT-JEE 2014)

The molecule which has zero dipole moment is:

Three photons coming from excited Atomic hydrogen sample are picked up. their energies are 12.1eV,10.2eV ,1.9eV. these photons must come from

Ethyl chloride (C2H5Cl), is prepared by reaction of ethylene with hydrogen chloride : C2H4(g)+HCl(g)→C2H5Cl(g) ΔH=−72.3kJ. What is the value of △E (in KJ), if 70g of ethylene and 73g of HCL are allowed to react at 300K.

Which of the following has highest electron affinity?

A spectral line in the spectrum of H atom has a wavenumber of 15222.22 cm−1 . The transition responsible for this radiation is (Rydberg constant R = 109677 cm−1)

Consider a sparingly soluble salt (AB) with concentration C1 and highly soluble salt (AX) with concentration C2. Then which of the following relation holds true? (Assume Ksp(AB)&lt;&lt;10−3)

Angular momentum of an electron in Bohr's orbit of hydrogen atom is 4.22 * 10-34 kg m​​​​​​2 s​​​​​​-1. Calculate the wavelength of the spectral line when the electron Falls from this level to the next lower level.

For the following reaction Cdiamond + O2 → CO2(g); ΔH = −94.3kcal Cgraphite + O2 → CO2(g);ΔH = −97.6kcal The heat required to change 1 g of Cdiamond → Cgraphite is

Why there is not jee main and advance 2018 solution? The last are of 2015. Seriously......?

What is 'A' in the following reaction?

Is it necessary to have even number of electrons in Nernst equation or it's just a pure coincidence with NCERT questions?

The reaction of C6H5CH=CHCH3 with HBr produces :

A solution is prepared by adding 2 g of a substance A to 18 g of water. Mass percent of solute A will be:

Can phosphorus with outer electronic configuration 3s2, 3p3 form PH5?

An aquase solution of 2% non volatile solute exerts a pressure of 1.004 bar at normal boiling point of solvent. What is the molecular mass of solute (vapour pressure of pure water is 1.013bar

Wurtz reaction fails in case of tert-alkyl halides. Why?

Which one of the following compounds is most acidic? a- ClCH2CH2OH. b- phenol. c- Ortho nitro phenol. d- Ortho cerosol. Please explain it to me

In the following reaction, The structure of the major product X is:

Which of the following is the correct order of size of the given species (a) I&gt;I−&gt;I+ (b) I+&gt;I−I (c) I&gt;I+&gt;I− (d) I−&gt;I&gt;I+

The following ether, when treated with HI produces –

What is the IUPAC name of the compound shown below:

Allergy involves

Find the number of molecules having two lone pair of electrons on central atom. I−3,XeF2,XeF4,H2O,NH−2H2S,H2SO4,NF3

Which of the following has maximum lattice energy?

Phenols are weaker acids than:

Which of the following colligative property can provide molar mass of proteins ( or polymers or colloids) with greater precision?

How to balance a redox reaction

What are glycosidic linkages? In which type of biomolecules are they present?

Calculate the mass of urea ( NH2CONH2 ) required in making 2.5kg of 0.25m aqueous solution.

Ionization energy of F− is 320KJ/mole. The electron gain enthalpy of fluorine would be

Which of the following molecules will have smallest bond length?

Which of the following freezing systems is used for cooling biotechnology products?

Consider a sparingly soluble salt (AB) with concentration C1 and highly soluble salt (AX) with concentration C2. Then which of the following relation holds true? (Assume Ksp(AB)<<10−3)

Angular momentum of an electron in Bohr's orbit of hydrogen atom is 4.22 * 10-34 kg m2 s-1. Calculate the wavelength of the spectral line when the electron Falls from this level to the next lower level.

Which of the following is the correct order of size of the given species (a) I>I−>I+ (b) I+>I−I (c) I>I+>I− (d) I−>I>I+