46295 + Interview Questions in Chemistry

1.	Structural units of ice and dry ice are, respectively.
Answer» Structural units of ice and dry ice are, respectively.

Discussion

2.	64 Why does [Co(en)2(Br)2]Cl has six isomers?
Answer» 64 Why does [Co(en)2(Br)2]Cl has six isomers?

Discussion

3.	The Van't Hoff factor calculated from association data is always ________ than calculated from dissociation data.
Answer» The Van't Hoff factor calculated from association data is always ________ than calculated from dissociation data.

Discussion

4.	Question 21PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Can you write the major difference between these two types of plastics?
Answer» Question 21 PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Can you write the major difference between these two types of plastics?

Discussion

5.	Heat of formation of benzene; assuming noresonance. Given thatBE (C-C)83 kcalBE (C=C)140 kcalBE (C-H) 99 kcalHeat of atomisation of C = 170.9 kcalHeat of atomisation of H104.2 kcalwill be(1) 39 kcal(2) 75 kcal(3) 1263 kcal(4) 421 kcal
Answer» Heat of formation of benzene; assuming noresonance. Given thatBE (C-C)83 kcalBE (C=C)140 kcalBE (C-H) 99 kcalHeat of atomisation of C = 170.9 kcalHeat of atomisation of H104.2 kcalwill be(1) 39 kcal(2) 75 kcal(3) 1263 kcal(4) 421 kcal

Discussion

6.	In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question. Assertion (A) One atomic mass unit is defined as one-twelfth of the mass of one carbon - 12 atom. Reason (R) Carbon - 12 isotope is the most abundant isotope of carbon and has been chosen as the standard. (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A. (c) A is false but R is true (d) Both A and R are false
Answer» In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question. Assertion (A) One atomic mass unit is defined as one-twelfth of the mass of one carbon - 12 atom. Reason (R) Carbon - 12 isotope is the most abundant isotope of carbon and has been chosen as the standard. (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A. (c) A is false but R is true (d) Both A and R are false

6.

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question. Assertion (A) One atomic mass unit is defined as one-twelfth of the mass of one carbon - 12 atom. Reason (R) Carbon - 12 isotope is the most abundant isotope of carbon and has been chosen as the standard. (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A. (c) A is false but R is true (d) Both A and R are false

Answer»

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question.

Assertion (A) One atomic mass unit is defined as one-twelfth of the mass of one carbon - 12 atom.

Reason (R) Carbon - 12 isotope is the most abundant isotope of carbon and has been chosen as the standard.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A.

(c) A is false but R is true

(d) Both A and R are false

Discussion

7.	Any short trick to find number of possible structural isomers
Answer» Any short trick to find number of possible structural isomers

Discussion

8.	How does acid catalysed Aldol condensation take place?
Answer» How does acid catalysed Aldol condensation take place?

Discussion

9.	Which of the following statement is true ?
Answer» Which of the following statement is true ?

Discussion

10.	Reagent(s) which can be used to bring about the following transformation is/are:
Answer» Reagent(s) which can be used to bring about the following transformation is/are:

Discussion

11.	Calomel on reaction with NH4OH gives
Answer» Calomel on reaction with NH4OH gives

Discussion

12.	which of the following compounds is most acidic? a)benzoic acid b)ortho nitro benzoic acid c)para nitro benzoic acid d)meta nitro benzoic aci
Answer» which of the following compounds is most acidic? a)benzoic acid b)ortho nitro benzoic acid c)para nitro benzoic acid d)meta nitro benzoic aci

Discussion

13.	The half life period for catalytic decomposition ofAB3 at 50 mm is found to be 4 hrs and at 100 mm it is 2 hrs. The order of reaction is:
Answer» The half life period for catalytic decomposition of $A B_{3} at 50 m m$ is found to be $4 h r s$ and at $100 m m it is 2 h r s$ . The order of reaction is:

Discussion

14.	The diameter of a bubble at the surface of a lake is 4 mm and at the bottom of the lake is 1 mm. If the atmospheric pressure is 1 atm and the temperature of the lake and the atmosphere are equal, what is the depth of the lake?(The density of the lake and mercury are 1 g/ml and 13.6 g/ml respectively. Ignore the surface tension)
Answer» The diameter of a bubble at the surface of a lake is $4 mm$ and at the bottom of the lake is $1 mm$ . If the atmospheric pressure is $1 atm$ and the temperature of the lake and the atmosphere are equal, what is the depth of the lake? (The density of the lake and mercury are $1 g/ml$ and $13.6 g/ml$ respectively. Ignore the surface tension)

Discussion

15.	Actinoid contraction is greater from element to element than lanthanoid contraction. Why?
Answer» Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

Discussion

16.	67 Give the increasing order of solubility of the following carbonates and sulphates respectively(II A grp) 1)BeCO3, MgCO3, CaCO3, SrCO3, BaCO3 2)BeSO4,MgSO4, CaSO4, SrSO4, BaSO4
Answer» 67 Give the increasing order of solubility of the following carbonates and sulphates respectively(II A grp) 1)BeCO3, MgCO3, CaCO3, SrCO3, BaCO3 2)BeSO4,MgSO4, CaSO4, SrSO4, BaSO4

Discussion

17.	The complex ions [Co(NH3)5NO2]2⊕ and [Co(NH3)5ONO]2⊕ are called
Answer» The complex ions $[C o (N H_{3})_{5} N O_{2}]^{2 \oplus}$ and $[C o (N H_{3})_{5} O N O]^{2 \oplus}$ are called

Discussion

18.	Let 1.00 kg of liquid water at 100∘C be converted to steam at 100∘C by boiling at standard atmospheric pressure (which is 1.00 atm or 1.01 × 105 Pa) in the arrangement as shown. The volume of that water changes from an initial value of 1.00×10−3 m3 as a liquid to 1.671 m3 as steam. 2. If the latent heat of vaporization is 2256 kJ/kg, how much energy is transferred as heat during the process?
Answer» Let 1.00 kg of liquid water at $100^{\circ} C$ be converted to steam at $100^{\circ} C$ by boiling at standard atmospheric pressure (which is 1.00 atm or 1.01 $\times$ 105 Pa) in the arrangement as shown. The volume of that water changes from an initial value of $1.00 \times 10^{- 3}$ $m^{3}$ as a liquid to 1.671 $m^{3}$ as steam. 2. If the latent heat of vaporization is 2256 kJ/kg, how much energy is transferred as heat during the process?

18.

Let 1.00 kg of liquid water at 100∘C be converted to steam at 100∘C by boiling at standard atmospheric pressure (which is 1.00 atm or 1.01 × 105 Pa) in the arrangement as shown. The volume of that water changes from an initial value of 1.00×10−3 m3 as a liquid to 1.671 m3 as steam. 2. If the latent heat of vaporization is 2256 kJ/kg, how much energy is transferred as heat during the process?

Answer»

Let 1.00 kg of liquid water at $100^{\circ} C$ be converted to steam at $100^{\circ} C$ by boiling at standard atmospheric pressure (which is 1.00 atm or 1.01 $\times$ 105 Pa) in the arrangement as shown. The volume of that water changes from an initial value of $1.00 \times 10^{- 3}$ $m^{3}$ as a liquid to 1.671 $m^{3}$ as steam.

2. If the latent heat of vaporization is 2256 kJ/kg, how much energy is transferred as heat during the process?

Discussion

19.	Oxidation state of Na in sodium amalgum?
Answer» Oxidation state of Na in sodium amalgum?

Discussion

20.	Which of the following pairs is not isostructural?
Answer» Which of the following pairs is not isostructural?

Discussion

21.	Which of the following gases will have density of 1.8 g L−1 at 760 torr pressure and 27∘C ?(Given R=0.082 L atm K −1 mol−1, 760 torr=1 atm,0∘C=273 K)
Answer» Which of the following gases will have density of $1.8 {g L}^{- 1}$ at $760 torr$ pressure and $27^{\circ} C$ ? $(G i v e n R = 0.082 L atm K^{- 1} {mol}^{- 1}, 760 torr = 1 atm, 0^{\circ} C = 273 K)$

Discussion

22.	The oxidation state which is not exhibited by group 18 elements is:
Answer» The oxidation state which is not exhibited by group 18 elements is:

Discussion

23.	What will be the product if we pass a tertiary alcohol through &quotcu tube"? Is it 2 methyl propene?
Answer» What will be the product if we pass a tertiary alcohol through "cu tube"? Is it 2 methyl propene?

Discussion

24.	48. A first order reaction is 15% completed in 20 minutes. How long will it take to complete 60% (112.76min)
Answer» 48. A first order reaction is 15% completed in 20 minutes. How long will it take to complete 60% (112.76min)

Discussion

25.	Find the density of a 3.6 M sulphuric acid solution i.e 29% H2SO4 by mass
Answer» Find the density of a 3.6 M sulphuric acid solution i.e 29% H2SO4 by mass

Discussion

26.	The number of particles crossing per unit area perpendicular to Z axis per unit time is given by N=-D(N2-N1)/(Z2-Z1),where N2 & N1 are the number of particles per unit volume at Z2 & Z1 respectively.what is the dimensional formula for D?
Answer» The number of particles crossing per unit area perpendicular to Z axis per unit time is given by N=-D(N2-N1)/(Z2-Z1),where N2 & N1 are the number of particles per unit volume at Z2 & Z1 respectively.what is the dimensional formula for D?

Discussion

27.	What is the order of the oxidizing power of perhalates?
Answer» What is the order of the oxidizing power of perhalates?

Discussion

28.	Acetic anhydride with ethanamine gives the product:
Answer» Acetic anhydride with ethanamine gives the product:

Discussion

29.	The number of isomers (excluding geometrical and stereoisomers) for (A) is:
Answer» The number of isomers (excluding geometrical and stereoisomers) for (A) is:

Discussion

30.	According to IUPAC nomenclature rules, the correct name of the compound is:
Answer» According to IUPAC nomenclature rules, the correct name of the compound is:

Discussion

31.	Which of the following species is not isoelectronic with the others?
Answer» Which of the following species is not isoelectronic with the others?

Discussion

32.	how to find molar conduc†an ce of complex compounds
Answer» how to find molar conduc†an ce of complex compounds

Discussion

33.	The product D of the reaction CH3ClKCN−−−→(A)H2O−−→(B)NH3−−−→(C)△−→(D)is
Answer» The product D of the reaction $C H_{3} C l K C N - -- \to (A) H_{2} O - - \to (B) N H_{3} - -- \to (C) △ - \to (D) i s$

Discussion

34.	The freezing point of a solution of acetic acid (mole fraction = 0.02) in benzene is 277.4 K. Acetic acid exists partly as a dimer 2A⇌A2. Determine the equilibrium constant for dimerisation. Freezing point of benzene is 278.4 K and Kf for benzene is 5.
Answer» The freezing point of a solution of acetic acid (mole fraction = $0.02$ ) in benzene is $277.4 K$ . Acetic acid exists partly as a dimer $2 A ⇌ A_{2} .$ Determine the equilibrium constant for dimerisation. Freezing point of benzene is $278.4 K$ and $K_{f}$ for benzene is $5$ .

Discussion

35.	Why the bond energy of C–D bond is higher than C–H bond ?
Answer» Why the bond energy of C–D bond is higher than C–H bond ?

Discussion

36.	For the combustion of 1 mole of liquid benzene at 25∘C, the heat of the reaction at constant pressure is given by, C6H6(l)+712O2(g)⟶6CO2(g)+3H2O(l) ΔH=−780980 cal What would be the heat of the reaction at constant volume?
Answer» For the combustion of 1 mole of liquid benzene at $25^{\circ} C$ , the heat of the reaction at constant pressure is given by, $C_{6} H_{6} (l) + 7 \frac{1}{2} O_{2} (g) ⟶ 6 C O_{2} (g) + 3 H_{2} O (l)$ $Δ H = - 780980 c a l$ What would be the heat of the reaction at constant volume?

Discussion

37.	What will be the concentration of CH3COO– in 0.1 M HCl solution, if dissociation cons†an t of 0.01 M CH3COOH is 1.8 × 10–5?
Answer» What will be the concentration of CH3COO– in 0.1 M HCl solution, if dissociation cons†an t of 0.01 M CH3COOH is 1.8 × 10–5?

Discussion

38.	What is the role of depressant in froth floatation process?
Answer» What is the role of depressant in froth floatation process?

Discussion

39.	the number of atoms present in kohl stick weighing 2 mg in total is approximately (assume the stick is made up of pure carbon ) a10^{24} b 10^{18} c 10^{23} d10^{20
Answer» the number of atoms present in kohl stick weighing 2 mg in total is approximately (assume the stick is made up of pure carbon ) a10^{24} b 10^{18} c 10^{23} d10^{20

Discussion

40.	which is more electronegative cl- or oh
Answer» which is more electronegative cl- or oh

Discussion

41.	Total number of isomers having molecular formula C4H8:-1) 62) 43) 54) 3
Answer» Total number of isomers having molecular formula C4H8:- 1) 6 2) 4 3) 5 4) 3

Discussion

42.	When a jar of air is put upside down on a gas jar of bromine vapours, the bromine vapours go up. Which gas is heavier? Is wood an example of sublimation?
Answer» When a jar of air is put upside down on a gas jar of bromine vapours, the bromine vapours go up. Which gas is heavier? Is wood an example of sublimation?

Discussion

43.	Among the following solids, which one shows the strongest bonding?
Answer» Among the following solids, which one shows the strongest bonding?

Discussion

44.	5. Calculate the molarity and mole fraction in one litre of 93 percent of H2SO4.the density of the solution is 1.84
Answer» 5. Calculate the molarity and mole fraction in one litre of 93 percent of H2SO4.the density of the solution is 1.84

Discussion

45.	Can we split atom?
Answer» Can we split atom?

Discussion

46.	The difference between the value of Cp of H2 and the Cv of He will be
Answer» The difference between the value of Cp of H2 and the Cv of He will be

Discussion

47.	If the sensitivity of bubble tube of a levelling instrument is 30" per 2 mm division, then the error in the staff reading on a staff held at a distance of 80 m caused by the bubble being 2 divisions out of the centre, will be
Answer» If the sensitivity of bubble tube of a levelling instrument is 30" per 2 mm division, then the error in the staff reading on a staff held at a distance of 80 m caused by the bubble being 2 divisions out of the centre, will be

Discussion

48.	20 mL of 0.2 M NaOH is added to 50 mL of 0.2 M acetic acid to give 70 mL of the solution. What is the pH of the solution? Calculate the additional volume x (in mL) of 0.2 M NaOH required to make pH of the solution 4.74. The ionisation constant of acetic acid is 1.8 × 10−5.
Answer» 20 mL of 0.2 M NaOH is added to 50 mL of 0.2 M acetic acid to give 70 mL of the solution. What is the $p H$ of the solution? Calculate the additional volume $x$ (in mL) of 0.2 M NaOH required to make pH of the solution 4.74. The ionisation constant of acetic acid is $1.8 \times 10^{- 5}$ .

Discussion

49.	Which of the following are paramagnetic species:
Answer» Which of the following are paramagnetic species:

Discussion

50.	By what type of bond is -OH attached to H3BO3 to form B(OH)4 ? Also explain the type of bond ?
Answer» By what type of bond is -OH attached to H3BO3 to form B(OH)4 ? Also explain the type of bond ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Structural units of ice and dry ice are, respectively.

64 Why does [Co(en)2(Br)2]Cl has six isomers?

The Van't Hoff factor calculated from association data is always ________ than calculated from dissociation data.

Question 21PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Can you write the major difference between these two types of plastics?

Heat of formation of benzene; assuming noresonance. Given thatBE (C-C)83 kcalBE (C=C)140 kcalBE (C-H) 99 kcalHeat of atomisation of C = 170.9 kcalHeat of atomisation of H104.2 kcalwill be(1) 39 kcal(2) 75 kcal(3) 1263 kcal(4) 421 kcal

Any short trick to find number of possible structural isomers

How does acid catalysed Aldol condensation take place?

Which of the following statement is true ?

Reagent(s) which can be used to bring about the following transformation is/are:

Calomel on reaction with NH4OH gives

which of the following compounds is most acidic? a)benzoic acid b)ortho nitro benzoic acid c)para nitro benzoic acid d)meta nitro benzoic aci

The half life period for catalytic decomposition ofAB3 at 50 mm is found to be 4 hrs and at 100 mm it is 2 hrs. The order of reaction is:

Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

67 Give the increasing order of solubility of the following carbonates and sulphates respectively(II A grp) 1)BeCO3, MgCO3, CaCO3, SrCO3, BaCO3 2)BeSO4,MgSO4, CaSO4, SrSO4, BaSO4

The complex ions [Co(NH3)5NO2]2⊕ and [Co(NH3)5ONO]2⊕ are called

Oxidation state of Na in sodium amalgum?

Which of the following pairs is not isostructural?

Which of the following gases will have density of 1.8 g L−1 at 760 torr pressure and 27∘C ?(Given R=0.082 L atm K −1 mol−1, 760 torr=1 atm,0∘C=273 K)

The oxidation state which is not exhibited by group 18 elements is:

What will be the product if we pass a tertiary alcohol through &quotcu tube"? Is it 2 methyl propene?

48. A first order reaction is 15% completed in 20 minutes. How long will it take to complete 60% (112.76min)

Find the density of a 3.6 M sulphuric acid solution i.e 29% H2SO4 by mass

The number of particles crossing per unit area perpendicular to Z axis per unit time is given by N=-D(N2-N1)/(Z2-Z1),where N2 & N1 are the number of particles per unit volume at Z2 & Z1 respectively.what is the dimensional formula for D?

What is the order of the oxidizing power of perhalates?

Acetic anhydride with ethanamine gives the product:

The number of isomers (excluding geometrical and stereoisomers) for (A) is:

According to IUPAC nomenclature rules, the correct name of the compound is:

Which of the following species is not isoelectronic with the others?

how to find molar conduc†an ce of complex compounds

The product D of the reaction CH3ClKCN−−−→(A)H2O−−→(B)NH3−−−→(C)△−→(D)is

The freezing point of a solution of acetic acid (mole fraction = 0.02) in benzene is 277.4 K. Acetic acid exists partly as a dimer 2A⇌A2. Determine the equilibrium constant for dimerisation. Freezing point of benzene is 278.4 K and Kf for benzene is 5.

Why the bond energy of C–D bond is higher than C–H bond ?

For the combustion of 1 mole of liquid benzene at 25∘C, the heat of the reaction at constant pressure is given by, C6H6(l)+712O2(g)⟶6CO2(g)+3H2O(l) ΔH=−780980 cal What would be the heat of the reaction at constant volume?

What will be the concentration of CH3COO– in 0.1 M HCl solution, if dissociation cons†an t of 0.01 M CH3COOH is 1.8 × 10–5?

What is the role of depressant in froth floatation process?

the number of atoms present in kohl stick weighing 2 mg in total is approximately (assume the stick is made up of pure carbon ) a10^{24} b 10^{18} c 10^{23} d10^{20

which is more electronegative cl- or oh

Total number of isomers having molecular formula C4H8:-1) 62) 43) 54) 3

When a jar of air is put upside down on a gas jar of bromine vapours, the bromine vapours go up. Which gas is heavier? Is wood an example of sublimation?

Among the following solids, which one shows the strongest bonding?

5. Calculate the molarity and mole fraction in one litre of 93 percent of H2SO4.the density of the solution is 1.84

Can we split atom?

The difference between the value of Cp of H2 and the Cv of He will be

If the sensitivity of bubble tube of a levelling instrument is 30" per 2 mm division, then the error in the staff reading on a staff held at a distance of 80 m caused by the bubble being 2 divisions out of the centre, will be

20 mL of 0.2 M NaOH is added to 50 mL of 0.2 M acetic acid to give 70 mL of the solution. What is the pH of the solution? Calculate the additional volume x (in mL) of 0.2 M NaOH required to make pH of the solution 4.74. The ionisation constant of acetic acid is 1.8 × 10−5.

Which of the following are paramagnetic species:

By what type of bond is -OH attached to H3BO3 to form B(OH)4 ? Also explain the type of bond ?