46295 + Interview Questions in Chemistry

1.	An ideal gas expands in volume from 1 × 10−3 to 1 × 10−2 m3 at 300 K against a constant pressure of 1 × 105 Nm−2. The work done is
Answer» An ideal gas expands in volume from $1 \times 10^{- 3}$ to $1 \times 10^{- 2} m^{3}$ at $300 K$ against a constant pressure of $1 \times 10^{5} N m^{- 2}$ . The work done is

Discussion

2.	Can u give brief description of SOMMERFELD EXTENSION in a understandable manner which is not mentioned in the videos.
Answer» Can u give brief description of SOMMERFELD EXTENSION in a understandable manner which is not mentioned in the videos.

Discussion

3.	Find the number of moles in 6.022 ×1025molecules of CO2
Answer» Find the number of moles in 6.022 ×10²⁵molecules of CO₂

Discussion

4.	Carbon monoxide is allowed to expand isothermally and reversibly from 10 m3 to 20 m3 at 300 K and work obtained is 4.754 kJ. Calculate the number of moles of carbon monoxide
Answer» Carbon monoxide is allowed to expand isothermally and reversibly from $10 m^{3} t o 20 m^{3}$ at $300 K$ and work obtained is $4.754 k J$ . Calculate the number of moles of carbon monoxide

Discussion

5.	An electron collides with an hydrogen atom In it's ground state and excites it to a state of n=3 How much energy was given to the hydrogen atom in this inelastic collision
Answer» An electron collides with an hydrogen atom In it's ground state and excites it to a state of n=3 How much energy was given to the hydrogen atom in this inelastic collision

Discussion

6.	The oxidation number for element S in Na2SO4
Answer» The oxidation number for element S in Na2SO4

Discussion

7.	Explain the process of preparation of sodium carbonate in detail
Answer» Explain the process of preparation of sodium carbonate in detail

Discussion

8.	150 mL of a H2O2 sample was divided into two parts. The first part was treated with KI and the formed KOH required 200 mL of M2 H2SO4 for neutralization. The other part was treated with KMnO4, yielding 6.72 L of O2 at 1 atm and 273 K. Using the given % yields find the molarity of H2O2. H2O2+2KI⟶I2+2KOH (Yield=40%) H2O2+2KMnO4+3H2SO4⟶K2SO4+2MnSO4+3O2+4H2O (Yield=50%)
Answer» 150 mL of a $H_{2} O_{2}$ sample was divided into two parts. The first part was treated with $K I$ and the formed $K O H$ required 200 mL of $\frac{M}{2}$ $H_{2} S O_{4}$ for neutralization. The other part was treated with $K M n O_{4}$ , yielding 6.72 L of $O_{2}$ at 1 atm and 273 K. Using the given % yields find the molarity of $H_{2} O_{2}$ . $H_{2} O_{2} + 2 K I ⟶ I_{2} + 2 K O H (Y i e l d = 40 %)$ $H_{2} O_{2} + 2 K M n O_{4} + 3 H_{2} S O_{4} ⟶ K_{2} S O_{4} + 2 M n S O_{4} + 3 O_{2} + 4 H_{2} O (Y i e l d = 50 %)$

Discussion

9.	What is the hybridization of oxygen in the given molecule
Answer» What is the hybridization of oxygen in the given molecule

Discussion

10.	Balance the following equation : PbS+H2O2→PbSO4+H2O
Answer» Balance the following equation : $P b S + H_{2} O_{2} \to P b S O_{4} + H_{2} O$

Discussion

11.	Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?
Answer» Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?

Discussion

12.	A gas described by Van der Waals equation _____.
Answer» A gas described by Van der Waals equation _____.

Discussion

13.	2 mole He is mixed with 2 g of H2. The molar heat capacity at constant pressure for the mixture is:
Answer» 2 mole $H e$ is mixed with 2 g of $H_{2}$ . The molar heat capacity at constant pressure for the mixture is:

Discussion

14.	QUESTION 2.2 Given an example of a solid solution in which the solute is a gas.
Answer» QUESTION 2.2 Given an example of a solid solution in which the solute is a gas.

14.

QUESTION 2.2 Given an example of a solid solution in which the solute is a gas.

Answer»

QUESTION 2.2

Given an example of a solid solution in which the solute is a gas.

Discussion

15.	Why Co (\|\|) is stable in aqueous solution but in the presence of strong ligands it can get oxidized to Co (\|\|\|)?
Answer» Why Co (\|\|) is stable in aqueous solution but in the presence of strong ligands it can get oxidized to Co (\|\|\|)?

Discussion

16.	Which of the following are sulpha drugs? (a) Sulphapyridine (b) Prontosil (c) Salyarsan (d) Nardi
Answer» Which of the following are sulpha drugs? (a) Sulphapyridine (b) Prontosil (c) Salyarsan (d) Nardi

Discussion

17.	What is the use of dipole moment in daily life
Answer» What is the use of dipole moment in daily life

Discussion

18.	When we solve questions of sets, we writes set A=n(A). Here what is the mean n
Answer» When we solve questions of sets, we writes set A=n(A). Here what is the mean n

Discussion

19.	For the same alkyl group, the boiling point of alkyl halides decrease in the order:
Answer» For the same alkyl group, the boiling point of alkyl halides decrease in the order:

Discussion

20.	A solution was made by dissolving 2 g of a solute in 100 g of acetone. The solution boiled at 56.95° C. The boiling point of pure acetone is 55.95° C, and the Kb =1.71°C/m. What is the molecular weight of the solute?
Answer» A solution was made by dissolving 2 g of a solute in 100 g of acetone. The solution boiled at 56.95° C. The boiling point of pure acetone is 55.95° C, and the K_b =1.71°C/m. What is the molecular weight of the solute?

Discussion

21.	Most efficient agent for absorption of SO3 is
Answer» Most efficient agent for absorption of $S O_{3}$ is

Discussion

22.	The pair that gives colour when reaction with NH4SCN is
Answer» The pair that gives colour when reaction with $N H_{4} S C N$ is

Discussion

23.	When acetone reacts with dilute aqueous solution of Ba(OH)2, the product obtained is called
Answer» When acetone reacts with dilute aqueous solution of $B a (O H)_{2}$ , the product obtained is called

Discussion

24.	The rate of loss of heat through a glass window of area 1000 cm2 and thickness 0.4 cm when temperature inside is 37oC and outside is -5oC is (Given, coefficient of thermal conductivity of glass is 2.2 x 10-3 cal s-1 cm k-1)
Answer» The rate of loss of heat through a glass window of area 1000 cm² and thickness 0.4 cm when temperature inside is 37^oC and outside is -5^oC is (Given, coefficient of thermal conductivity of glass is 2.2 x 10^-3 cal s^-1 cm k^-1)

Discussion

25.	In PCl5, the three P- Cl bonds in plane are called as
Answer» In PCl₅, the three P- Cl bonds in plane are called as

Discussion

26.	6.02 × 1020 molecules of urea are present in 100 mL of its solution. Concentration of urea solution is
Answer» 6.02 × 10²⁰ molecules of urea are present in 100 mL of its solution. Concentration of urea solution is

Discussion

27.	Complete the following equations : (i) C+conc.H2SO4→ (ii) XeF2+H2O→
Answer» Complete the following equations : (i) $C + c o n c . H_{2} S O_{4} \to$ (ii) $X e F_{2} + H_{2} O \to$

Discussion

28.	Which of the following ion has smallest ionic radius
Answer» Which of the following ion has smallest ionic radius

Discussion

29.	For the given compounds the correct order of resonance energy is:
Answer» For the given compounds the correct order of resonance energy is:

Discussion

30.	a strong current of trivalent gaseous boron passes through a silicon crystal decreases the density of the crystal due to the part replacement of silicon by boron and due to the interstitial vacancies carried by the missing silicon atoms . in one such experiment one gram of silicon is taken and the boron atoms are found to be 1000pm by mass when the density of the silicon crystal decreases by 12%. the percentagesof missing vacancies due to silicon which are filled up by boron atoms is
Answer» a strong current of trivalent gaseous boron passes through a silicon crystal decreases the density of the crystal due to the part replacement of silicon by boron and due to the interstitial vacancies carried by the missing silicon atoms . in one such experiment one gram of silicon is taken and the boron atoms are found to be 1000pm by mass when the density of the silicon crystal decreases by 12%. the percentagesof missing vacancies due to silicon which are filled up by boron atoms is

Discussion

31.	Starting with the same initial conditions, an ideal gas expands from volume V1 to V2 in three different ways. The work done by the gas is W1 if the process is purely isothermal, W2 if purely isobaric and W3 if purely adiabatic. Then
Answer» Starting with the same initial conditions, an ideal gas expands from volume $V_{1} t o V_{2}$ in three different ways. The work done by the gas is $W_{1}$ if the process is purely isothermal, $W_{2}$ if purely isobaric and $W_{3}$ if purely adiabatic. Then

Discussion

32.	Gadolinium (Gd) has a 4f75d16s2 electronic configuration outside the [Xe] core. Find the spin only magnetic moment of Gd3+.
Answer» Gadolinium (Gd) has a $4 f^{7} 5 d^{1} 6 s^{2}$ electronic configuration outside the [Xe] core. Find the spin only magnetic moment of $G d^{3 +}$ .

Discussion

33.	What are the monomers of Bakelite??
Answer» What are the monomers of Bakelite??

Discussion

34.	Calculate the total number of electrons present in 1.4 g of dinitrogen gas.
Answer» Calculate the total number of electrons present in 1.4 g of dinitrogen gas.

Discussion

35.	The density of 2.45 M methanol in its aqueous solution is 0.9766 g/ml The molality of the soultion is : A 27.3 B 2.73 C 2.45 D 0.273
Answer» The density of 2.45 M methanol in its aqueous solution is 0.9766 g/ml The molality of the soultion is : A 27.3 B 2.73 C 2.45 D 0.273

35.

The density of 2.45 M methanol in its aqueous solution is 0.9766 g/ml The molality of the soultion is : A 27.3 B 2.73 C 2.45 D 0.273

Answer»

The density of 2.45 M methanol in its aqueous solution is 0.9766 g/ml The molality of the soultion is :

A 27.3

B 2.73

C 2.45

D 0.273

Discussion

36.	Why for group 13elements order of reducing power and metallic character is different although both are same things ie loss of electron.
Answer» Why for group 13elements order of reducing power and metallic character is different although both are same things ie loss of electron.

Discussion

37.	Identify the catalyst promoter and poison in the following reaction N2(g)+3H2(g) ------> 2NH3(g)
Answer» Identify the catalyst promoter and poison in the following reaction N2(g)+3H2(g) ------> 2NH3(g)

Discussion

38.	The percentage of hydrolysis in 0.003 M aqueous solution of NaOCN is: (Ka for HOCN = 3.33 × 10−4 M)
Answer» The percentage of hydrolysis in $0.003 M$ aqueous solution of $N a O C N$ is: ( $K_{a}$ for $H O C N$ = $3.33 \times 10^{- 4} M$ )

38.

The percentage of hydrolysis in 0.003 M aqueous solution of NaOCN is: (Ka for HOCN = 3.33 × 10−4 M)

Answer»

The percentage of hydrolysis in $0.003 M$ aqueous solution of $N a O C N$ is:

( $K_{a}$ for $H O C N$ = $3.33 \times 10^{- 4} M$ )

Discussion

39.	N^3- , O^2- , F^- , Mg^2+ , Na^+ , Al^3+ Arrange in the increasing order of ionic radii.
Answer» N^3- , O^2- , F^- , Mg^2+ , Na^+ , Al^3+ Arrange in the increasing order of ionic radii.

Discussion

40.	The members of the oxygen family are located in the p-block.Explain.
Answer» The members of the oxygen family are located in the p-block.Explain.

Discussion

41.	Among the following oxoacids, the correct decreasing order of acid strength is (IIT-JEE Advanced, 2014)
Answer» Among the following oxoacids, the correct decreasing order of acid strength is (IIT-JEE Advanced, 2014)

Discussion

42.	Which of the following will result in Anti-bonding Molecular Orbitals?
Answer» Which of the following will result in Anti-bonding Molecular Orbitals?

42.

Which of the following will result in Anti-bonding Molecular Orbitals?

Answer»

Which of the following will result in Anti-bonding Molecular Orbitals?

Discussion

43.	The correct electronic configuration of V2+ is:
Answer» The correct electronic configuration of $V^{2 +}$ is:

Discussion

44.	What is " reducing nature' of alkali metal ,with respect to standard electrode potential ??
Answer» What is " reducing nature' of alkali metal ,with respect to standard electrode potential ??

Discussion

45.	The ground state electronic configuration of nitrogen atom can be represented by
Answer» The ground state electronic configuration of nitrogen atom can be represented by

Discussion

46.	Which among the following compounds is the strongest acid?
Answer» Which among the following compounds is the strongest acid?

Discussion

47.	From the given option, which structure exhibits tautomerism?(CH3)2NH(CH3)3CNOR3CNO2RCH2NO2
Answer» From the given option, which structure exhibits tautomerism? ${(C H_{3})}_{2} N H$ ${(C H_{3})}_{3} C N O$ $R_{3} C N O_{2}$ $R C H_{2} N O_{2}$

47.

From the given option, which structure exhibits tautomerism?(CH3)2NH(CH3)3CNOR3CNO2RCH2NO2

Answer»

From the given option, which structure exhibits tautomerism?

${(C H_{3})}_{2} N H$
${(C H_{3})}_{3} C N O$
$R_{3} C N O_{2}$
$R C H_{2} N O_{2}$

Discussion

48.	When we apply moisturizer on our skin, what kind of adsorption can we call it? Assume the moisturizer doesn't evaporate from the skin surface.
Answer» When we apply moisturizer on our skin, what kind of adsorption can we call it? Assume the moisturizer doesn't evaporate from the skin surface.

Discussion

49.	Which of the following is not correct? Order of basicity Order of nucleophilicity(a) F−>Cl−>Br− Br−>Cl−>F−(b) H−O−O−>OH− H−O−O−>OH−(c)CH3>NH−2>OH− CH3>NH−2>OH−(d)H2O>H2S H2O<H2S
Answer» Which of the following is not correct? $O r d e r o f b a s i c i t y O r d e r o f n u c l e o p h i l i c i t y (a) F^{-} > C l^{-} > B r^{-} B r_{-} > C l^{-} > F^{-} (b) H - O - O^{-} > O H^{-} H - O - O^{-} > O H^{-} (c) C H_{3} > N H_{2}^{-} > O H - C H_{3} > N H_{2}^{-} > O H^{-} (d) H_{2} O > H_{2} S H_{2} O < H_{2} S$

Discussion

50.	Choose the fully eclipsed conformation of butane from among the following.
Answer» Choose the fully eclipsed conformation of butane from among the following.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

An ideal gas expands in volume from 1 × 10−3 to 1 × 10−2 m3 at 300 K against a constant pressure of 1 × 105 Nm−2. The work done is

Can u give brief description of SOMMERFELD EXTENSION in a understandable manner which is not mentioned in the videos.

Find the number of moles in 6.022 ×1025molecules of CO2

Carbon monoxide is allowed to expand isothermally and reversibly from 10 m3 to 20 m3 at 300 K and work obtained is 4.754 kJ. Calculate the number of moles of carbon monoxide

An electron collides with an hydrogen atom In it's ground state and excites it to a state of n=3 How much energy was given to the hydrogen atom in this inelastic collision

The oxidation number for element S in Na2SO4

Explain the process of preparation of sodium carbonate in detail

What is the hybridization of oxygen in the given molecule

Balance the following equation : PbS+H2O2→PbSO4+H2O

Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?

A gas described by Van der Waals equation _____.

2 mole He is mixed with 2 g of H2. The molar heat capacity at constant pressure for the mixture is:

QUESTION 2.2 Given an example of a solid solution in which the solute is a gas.

Why Co (||) is stable in aqueous solution but in the presence of strong ligands it can get oxidized to Co (|||)?

Which of the following are sulpha drugs? (a) Sulphapyridine (b) Prontosil (c) Salyarsan (d) Nardi

What is the use of dipole moment in daily life

When we solve questions of sets, we writes set A=n(A). Here what is the mean n

For the same alkyl group, the boiling point of alkyl halides decrease in the order:

A solution was made by dissolving 2 g of a solute in 100 g of acetone. The solution boiled at 56.95° C. The boiling point of pure acetone is 55.95° C, and the Kb =1.71°C/m. What is the molecular weight of the solute?

Most efficient agent for absorption of SO3 is

The pair that gives colour when reaction with NH4SCN is

When acetone reacts with dilute aqueous solution of Ba(OH)2, the product obtained is called

The rate of loss of heat through a glass window of area 1000 cm2 and thickness 0.4 cm when temperature inside is 37oC and outside is -5oC is (Given, coefficient of thermal conductivity of glass is 2.2 x 10-3 cal s-1 cm k-1)

In PCl5, the three P- Cl bonds in plane are called as

6.02 × 1020 molecules of urea are present in 100 mL of its solution. Concentration of urea solution is

Complete the following equations : (i) C+conc.H2SO4→ (ii) XeF2+H2O→

Which of the following ion has smallest ionic radius

For the given compounds the correct order of resonance energy is:

Starting with the same initial conditions, an ideal gas expands from volume V1 to V2 in three different ways. The work done by the gas is W1 if the process is purely isothermal, W2 if purely isobaric and W3 if purely adiabatic. Then

Gadolinium (Gd) has a 4f75d16s2 electronic configuration outside the [Xe] core. Find the spin only magnetic moment of Gd3+.

What are the monomers of Bakelite??

Calculate the total number of electrons present in 1.4 g of dinitrogen gas.

The density of 2.45 M methanol in its aqueous solution is 0.9766 g/ml The molality of the soultion is : A 27.3 B 2.73 C 2.45 D 0.273

Why for group 13elements order of reducing power and metallic character is different although both are same things ie loss of electron.

Identify the catalyst promoter and poison in the following reaction N2(g)+3H2(g) ------> 2NH3(g)

The percentage of hydrolysis in 0.003 M aqueous solution of NaOCN is: (Ka for HOCN = 3.33 × 10−4 M)

N^3- , O^2- , F^- , Mg^2+ , Na^+ , Al^3+ Arrange in the increasing order of ionic radii.

The members of the oxygen family are located in the p-block.Explain.

Among the following oxoacids, the correct decreasing order of acid strength is (IIT-JEE Advanced, 2014)

Which of the following will result in Anti-bonding Molecular Orbitals?

The correct electronic configuration of V2+ is:

What is " reducing nature' of alkali metal ,with respect to standard electrode potential ??

The ground state electronic configuration of nitrogen atom can be represented by

Which among the following compounds is the strongest acid?

From the given option, which structure exhibits tautomerism?(CH3)2NH(CH3)3CNOR3CNO2RCH2NO2

When we apply moisturizer on our skin, what kind of adsorption can we call it? Assume the moisturizer doesn't evaporate from the skin surface.

Which of the following is not correct? Order of basicity Order of nucleophilicity(a) F−&gt;Cl−&gt;Br− Br−&gt;Cl−&gt;F−(b) H−O−O−&gt;OH− H−O−O−&gt;OH−(c)CH3&gt;NH−2&gt;OH− CH3&gt;NH−2&gt;OH−(d)H2O&gt;H2S H2O&lt;H2S

Choose the fully eclipsed conformation of butane from among the following.

Which of the following is not correct? Order of basicity Order of nucleophilicity(a) F−>Cl−>Br− Br−>Cl−>F−(b) H−O−O−>OH− H−O−O−>OH−(c)CH3>NH−2>OH− CH3>NH−2>OH−(d)H2O>H2S H2O<H2S