46295 + Interview Questions in Chemistry

1.	Are dil.hcl and conc.hcl oxidizing or reducing agents?
Answer» Are dil.hcl and conc.hcl oxidizing or reducing agents?

Discussion

2.	AlF3 is soluble in. HF only in presence of KF it is due to formation of 19:43
Answer» AlF3 is soluble in. HF only in presence of KF it is due to formation of 19:43

Discussion

3.	what is sp3 and sp2 hybridasition?
Answer» what is sp3 and sp2 hybridasition?

Discussion

4.	The compounds(s) that on hydrogenation produce(s) optically inactive compound(s) is/(are):
Answer» The compounds(s) that on hydrogenation produce(s) optically inactive compound(s) is/(are):

Discussion

5.	What is the product of the following SN2 reaction?
Answer» What is the product of the following $S N^{2}$ reaction?

Discussion

6.	Which of the following is a non-aromatic compound?
Answer» Which of the following is a non-aromatic compound?

Discussion

7.	How many of the following reduction process are correct ? (1) B2O3+AlΔ⟶B (2) Cr2O3+2AlΔ⟶Cr (3) TiCl4+MgΔ⟶Ti (4) PbS+PbOΔ⟶Pb (5) 3Fe2O3+CO→2Fe3O4+CO2 (6) Fe3O4+CO→3FeO+CO2 (7) 2Cu2O+Cu2S→6Cu+SO2 (8) SnO2+C→SnO+CO↑
Answer» How many of the following reduction process are correct ? (1) $B_{2} O_{3} + A l Δ ⟶ B$ (2) $C r_{2} O_{3} + 2 A l Δ ⟶ C r$ (3) $T i C l_{4} + M g Δ ⟶ T i$ (4) $P b S + P b O Δ ⟶ P b$ (5) $3 F e_{2} O_{3} + C O \to 2 F e_{3} O_{4} + C O_{2}$ (6) $F e_{3} O_{4} + C O \to 3 F e O + C O_{2}$ (7) $2 C u_{2} O + C u_{2} S \to 6 C u + S O_{2}$ (8) $S n O_{2} + C \to S n O + C O ↑$

Discussion

8.	Which of the following alkanes cannot be prepared using Wurtz reaction?[0.77 Mark]
Answer» Which of the following alkanes cannot be prepared using Wurtz reaction? [0.77 Mark]

Discussion

9.	Tan3x+{2x} is periodic or not where{.} Is fractional part of x.
Answer» Tan3x+{2x} is periodic or not where{.} Is fractional part of x.

Discussion

10.	Specify the hybridisations of the central atoms in N−3, NOCl and N2O.
Answer» Specify the hybridisations of the central atoms in $N_{3}^{-}, N O C l$ and $N_{2} O$ .

Discussion

11.	Atoms of element B form hcp lattice and those of the element A occupy 23rd of tetrahedral voids. What is the formula of the compound formed by the elements A and B?
Answer» Atoms of element B form hcp lattice and those of the element A occupy $\frac{2}{3}$ rd of tetrahedral voids. What is the formula of the compound formed by the elements A and B?

Discussion

12.	For the elementary reaction 2A ⇌ B,The forward and backward rate constants are k1 and k2 respectively. Then the rate of disappearance of A is equal to:
Answer» For the elementary reaction 2A $⇌$ B,The forward and backward rate constants are $k_{1}$ and $k_{2}$ respectively. Then the rate of disappearance of A is equal to:

Discussion

13.	Paheli mixed flour and water and(i) made a dough,(ii) rolled the dough to make chapati,(iii) baked the chapati on a pan,(iv) dried the chapati and ground it in a grinder to make powder.Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.
Answer» Paheli mixed flour and water and (i) made a dough, (ii) rolled the dough to make chapati, (iii) baked the chapati on a pan, (iv) dried the chapati and ground it in a grinder to make powder. Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.

Discussion

14.	15. Is work is a path dependent or not. Explain.
Answer» 15. Is work is a path dependent or not. Explain.

Discussion

15.	The product formed in the reaction of SOCl2 With white phosphorous is
Answer» The product formed in the reaction of $S O C l_{2}$ With white phosphorous is

Discussion

16.	A certain source of radiation emits 8×1015 quanta sec−1. Calculate the power output in J sec−1. Given: λ=840 nm
Answer» A certain source of radiation emits $8 \times 10^{15} {quanta sec}^{- 1}$ . Calculate the power output in ${J sec}^{- 1}$ . Given: $λ = 840 nm$

Discussion

17.	What is nascent oxygen give me detail about its formation and properties
Answer» What is nascent oxygen give me detail about its formation and properties

Discussion

18.	A deep brown gas is formed by mixing two colourless gases which are:
Answer» A deep brown gas is formed by mixing two colourless gases which are:

Discussion

19.	How to identify that solid of particular compound is ionic or covalent
Answer» How to identify that solid of particular compound is ionic or covalent

Discussion

20.	At 80∘ C, the vapour pressure of a pure liquid A is 520 mm Hg and that of a pure liquid of B is 1000 mm Hg. If the ideal mixture of liquids A and B boils at 80∘ C and 1 atm pressure, the amount of solution A in the mixture is: (1 atm = 760 mm Hg)
Answer» At $80^{\circ} C$ , the vapour pressure of a pure liquid $A$ is $520 mm Hg$ and that of a pure liquid of $B$ is $1000 mm Hg$ . If the ideal mixture of liquids $A$ and $B$ boils at $80^{\circ} C$ and 1 atm pressure, the amount of solution A in the mixture is: (1 atm = 760 mm Hg)

Discussion

21.	1.84 g mixture of CaCO3 and MgCO3 was heated to a constant weight till 0.96g residue formed %MgCO3 in a sample was
Answer» 1.84 g mixture of CaCO3 and MgCO3 was heated to a constant weight till 0.96g residue formed %MgCO3 in a sample was

Discussion

22.	What is Amphoteric oxide?
Answer» What is Amphoteric oxide?

Discussion

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

Discussion

24.	Silver atom has completely filled d orbitals (4d10) in its ground state. How can you say that it is a transition element?
Answer» Silver atom has completely filled d orbitals (4d¹⁰) in its ground state. How can you say that it is a transition element?

Discussion

25.	for the reation xMNO4- +yC2O4 2- +16H+→ Mn2+ +zCO2+8H2O .the xyz are
Answer» for the reation xMNO4- +yC2O4 2- +16H+→ Mn2+ +zCO2+8H2O .the xyz are

Discussion

26.	A 0.1 M aqueous solution of a monoprotic acid (ρ=1.01g/cm3) is 5% ionized. Calculate the freezing point of the solution.Given:Molecular weight of acid=300 g mol−1Kf(H2O)=1.86∘C/m:
Answer» A $0.1 M$ aqueous solution of a monoprotic acid $(ρ = 1.01 g / c m^{3})$ is $5 %$ ionized. Calculate the freezing point of the solution. Given: $Molecular weight of acid = 300 g m o l^{- 1}$ $K_{f} (H_{2} O) = {1.86}^{\circ} C / m :$

Discussion

27.	write the major product of following cross aldol condenstion : formaldehyde and propionaldehyd
Answer» write the major product of following cross aldol condenstion : formaldehyde and propionaldehyd

Discussion

28.	The heat of neutralisation for 2 moles of LiOH and 1 mole of H2SO4 at 25degreeC is -69.6KJ.the heat of ionisation of LiOH WILL BE
Answer» The heat of neutralisation for 2 moles of LiOH and 1 mole of H2SO4 at 25degreeC is -69.6KJ.the heat of ionisation of LiOH WILL BE

Discussion

29.	Which of the carbocations is stabilized by resonance?
Answer» Which of the carbocations is stabilized by resonance?

Discussion

30.	3.Which one of the following is likely to give aprecipitate with AgNO, solution?(1) (CH3)3CCI(3) CH-CH-CI(2) CHCI4) CCI4 hw to see it
Answer» 3.Which one of the following is likely to give aprecipitate with AgNO, solution?(1) (CH3)3CCI(3) CH-CH-CI(2) CHCI4) CCI4 hw to see it

Discussion

31.	Which of the following is/are an organometallic compound?
Answer» Which of the following is/are an organometallic compound?

Discussion

32.	Easy steps for mole concept?
Answer» Easy steps for mole concept?

Discussion

33.	if relative decreases in vapour pressure is 0.4 for a solution containing 1 molar NaCl in 3 mole of H2O then percentage ionisation of NaCl is
Answer» if relative decreases in vapour pressure is 0.4 for a solution containing 1 molar NaCl in 3 mole of H2O then percentage ionisation of NaCl is

Discussion

34.	The molecule with the highest dipole moment among the following is:
Answer» The molecule with the highest dipole moment among the following is:

Discussion

35.	Propose structures for hydrocarbons that give the following products on oxidative cleavage by KMnO4 or O3: HOOC(CH2)8COOH
Answer» Propose structures for hydrocarbons that give the following products on oxidative cleavage by $K M n O_{4}$ or $O_{3}$ : $H O O C (C H_{2})_{8} C O O H$

Discussion

36.	Standard Free Energy and Equilibrium constant: The change in free energy for a reaction taking place between gaseous reactants and products represented by general equation.ΔG=ΔG∘+R T lnQP the condition for a system to be at equilibrium is thatΔG=0 and Qp=KPThus at equilibriumΔG∘=−R T lnKPNote: In the reaction, where all gaseous reactants and products; K represents KP, we may conclude that for standard reactions, i.e., at 1 M or 1 atmWhen ΔG∘=−ve or K>1: forward reaction is feasibleΔG∘=+ve or K<1: reverse reaction is feasibleΔG∘=0 or K=1: reaction is at equilibrium (very rare)Kc for reaction N2O4⇌2NO2 in chloroform at 291 K is 1.14. Calculate the free energy change of the reaction when the concentration of the two gases are 0.5 mol dm−3 each at the same temperature. (R=0.082 lit atm K−1mol−1)
Answer» Standard Free Energy and Equilibrium constant: The change in free energy for a reaction taking place between gaseous reactants and products represented by general equation. $Δ G = Δ G^{\circ} + R T l n Q_{P}$ the condition for a system to be at equilibrium is that $Δ G = 0 and Q_{p} = K_{P}$ Thus at equilibrium $Δ G^{\circ} = - R T l n K_{P}$ Note: In the reaction, where all gaseous reactants and products; $K represents K_{P}$ , we may conclude that for standard reactions, i.e., at $1 M or 1 atm$ When $Δ G^{\circ} = - v e or K > 1 : forward reaction is feasible$ $Δ G^{\circ} = + v e or K < 1 : reverse reaction is feasible$ $Δ G^{\circ} = 0 or K = 1 : reaction is at equilibrium (very rare)$ $K_{c}$ for reaction $N_{2} O_{4} ⇌ 2 N O_{2}$ in chloroform at $291 K$ is $1.14$ . Calculate the free energy change of the reaction when the concentration of the two gases are $0.5 {mol dm}^{- 3}$ each at the same temperature. ( $R = 0.082 {lit atm K}^{- 1} {mol}^{- 1}$ )

Discussion

37.	Write the resonance structures of CO2−3andHCO−3.
Answer» Write the resonance structures of $C O_{3}^{2 -} a n d H C O_{3}^{-}$ .

Discussion

38.	Which of these pairs of elements would be most likely to form an ionic compound?
Answer» Which of these pairs of elements would be most likely to form an ionic compound?

Discussion

39.	20. No. of sereoisomers of [Pt(en)(NH3)2Cl2]Cl2 (a)2 (b)3 (c)4 (d)5
Answer» 20. No. of sereoisomers of [Pt(en)(NH3)2Cl2]Cl2 (a)2 (b)3 (c)4 (d)5

Discussion

40.	Benzophenone has freezing point 49^°C. 0.45 molal solution of urea in benzophenone has freezing point 44.59^°C. Find Kf of solvent.
Answer» Benzophenone has freezing point 49^°C. 0.45 molal solution of urea in benzophenone has freezing point 44.59^°C. Find Kf of solvent.

Discussion

41.	Which has higher dipole moment?
Answer» Which has higher dipole moment?

Discussion

42.	What happens when CycloHexan-2-en-ol is reacted with Grignard Reagent in presence of water
Answer» What happens when CycloHexan-2-en-ol is reacted with Grignard Reagent in presence of water

Discussion

43.	One mole of 1,2−Dibromopropane on treatment with x moles of NaNH2 followed by treatment with ethyl bromide gave 2−pentyne. The value of x is:
Answer» One mole of $1, 2 - Dibromopropane$ on treatment with $x$ moles of $N a N H_{2}$ followed by treatment with ethyl bromide gave $2 - p e n t y n e$ . The value of $x$ is:

Discussion

44.	In a gas of diatomic molecules, the ratio of the two specific heats of gas CpCv is
Answer» In a gas of diatomic molecules, the ratio of the two specific heats of gas $\frac{C_{p}}{C_{v}}$ is

Discussion

45.	2. In a binary solution of methyl alcohol and water, if the mass of methyl alcohol and water is 48g and 81g respectively, then the mole fraction of methyl alcohol in the solution is (a)0.5 (b) 0.25 (c) 0.33 (d)0.15
Answer» 2. In a binary solution of methyl alcohol and water, if the mass of methyl alcohol and water is 48g and 81g respectively, then the mole fraction of methyl alcohol in the solution is (a)0.5 (b) 0.25 (c) 0.33 (d)0.15

Discussion

46.	what are the products obtained1. acetamide + sodalime=?2.acetamide + PCl5=?3. acetamide + hot concentrated H2SO4=?
Answer» what are the products obtained 1. acetamide + sodalime=? 2.acetamide + PCl5=? 3. acetamide + hot concentrated H2SO4=?

Discussion

47.	Calculate enthalpy change for the change 8S(g)→S8(g)′ given thatH2S2(g)→2H(g)+2S(g),ΔH=239.0 k cal mol−1H2S2(g)→2H(g)+S(g),ΔH=175.0 k cal mol−1
Answer» Calculate enthalpy change for the change $8 S_{(g)} \to S_{8 (g)^{'}}$ given that $H_{2} S_{2 (g)} \to 2 H_{(g)} + 2 S_{(g)}, Δ H = 239.0 k c a l m o l^{- 1} H_{2} S_{2 (g)} \to 2 H_{(g)} + S_{(g)}, Δ H = 175.0 k c a l m o l^{- 1}$

Discussion

48.	What is the ratio of the energies of two radiations in which one has a wavelength of 6000 ∘A the other has a wavelength of 2000 ∘A?
Answer» What is the ratio of the energies of two radiations in which one has a wavelength of $6000 \circ A$ the other has a wavelength of $2000 \circ A$ ?

Discussion

49.	The orbital diagram in which the aufbau principle is not violated:
Answer» The orbital diagram in which the aufbau principle is not violated:

Discussion

50.	Amongst the following elements (whose electronic configurations are given below), the one having the highest ionisation energy is
Answer» Amongst the following elements (whose electronic configurations are given below), the one having the highest ionisation energy is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Are dil.hcl and conc.hcl oxidizing or reducing agents?

AlF3 is soluble in. HF only in presence of KF it is due to formation of 19:43

what is sp3 and sp2 hybridasition?

The compounds(s) that on hydrogenation produce(s) optically inactive compound(s) is/(are):

What is the product of the following SN2 reaction?

Which of the following is a non-aromatic compound?

How many of the following reduction process are correct ? (1) B2O3+AlΔ⟶B (2) Cr2O3+2AlΔ⟶Cr (3) TiCl4+MgΔ⟶Ti (4) PbS+PbOΔ⟶Pb (5) 3Fe2O3+CO→2Fe3O4+CO2 (6) Fe3O4+CO→3FeO+CO2 (7) 2Cu2O+Cu2S→6Cu+SO2 (8) SnO2+C→SnO+CO↑

Which of the following alkanes cannot be prepared using Wurtz reaction?[0.77 Mark]

Tan3x+{2x} is periodic or not where{.} Is fractional part of x.

Specify the hybridisations of the central atoms in N−3, NOCl and N2O.

Atoms of element B form hcp lattice and those of the element A occupy 23rd of tetrahedral voids. What is the formula of the compound formed by the elements A and B?

For the elementary reaction 2A ⇌ B,The forward and backward rate constants are k1 and k2 respectively. Then the rate of disappearance of A is equal to:

Paheli mixed flour and water and(i) made a dough,(ii) rolled the dough to make chapati,(iii) baked the chapati on a pan,(iv) dried the chapati and ground it in a grinder to make powder.Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.

15. Is work is a path dependent or not. Explain.

The product formed in the reaction of SOCl2 With white phosphorous is

A certain source of radiation emits 8×1015 quanta sec−1. Calculate the power output in J sec−1. Given: λ=840 nm

What is nascent oxygen give me detail about its formation and properties

A deep brown gas is formed by mixing two colourless gases which are:

How to identify that solid of particular compound is ionic or covalent

At 80∘ C, the vapour pressure of a pure liquid A is 520 mm Hg and that of a pure liquid of B is 1000 mm Hg. If the ideal mixture of liquids A and B boils at 80∘ C and 1 atm pressure, the amount of solution A in the mixture is: (1 atm = 760 mm Hg)

1.84 g mixture of CaCO3 and MgCO3 was heated to a constant weight till 0.96g residue formed %MgCO3 in a sample was

What is Amphoteric oxide?

Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040. (Assume the density of water to be 1)

Silver atom has completely filled d orbitals (4d10) in its ground state. How can you say that it is a transition element?

for the reation xMNO4- +yC2O4 2- +16H+→ Mn2+ +zCO2+8H2O .the xyz are

A 0.1 M aqueous solution of a monoprotic acid (ρ=1.01g/cm3) is 5% ionized. Calculate the freezing point of the solution.Given:Molecular weight of acid=300 g mol−1Kf(H2O)=1.86∘C/m:

write the major product of following cross aldol condenstion : formaldehyde and propionaldehyd

The heat of neutralisation for 2 moles of LiOH and 1 mole of H2SO4 at 25degreeC is -69.6KJ.the heat of ionisation of LiOH WILL BE

Which of the carbocations is stabilized by resonance?

3.Which one of the following is likely to give aprecipitate with AgNO, solution?(1) (CH3)3CCI(3) CH-CH-CI(2) CHCI4) CCI4 hw to see it

Which of the following is/are an organometallic compound?

Easy steps for mole concept?

if relative decreases in vapour pressure is 0.4 for a solution containing 1 molar NaCl in 3 mole of H2O then percentage ionisation of NaCl is

The molecule with the highest dipole moment among the following is:

Propose structures for hydrocarbons that give the following products on oxidative cleavage by KMnO4 or O3: HOOC(CH2)8COOH

Write the resonance structures of CO2−3andHCO−3.

Which of these pairs of elements would be most likely to form an ionic compound?

20. No. of sereoisomers of [Pt(en)(NH3)2Cl2]Cl2 (a)2 (b)3 (c)4 (d)5

Benzophenone has freezing point 49^°C. 0.45 molal solution of urea in benzophenone has freezing point 44.59^°C. Find Kf of solvent.

Which has higher dipole moment?

What happens when CycloHexan-2-en-ol is reacted with Grignard Reagent in presence of water

One mole of 1,2−Dibromopropane on treatment with x moles of NaNH2 followed by treatment with ethyl bromide gave 2−pentyne. The value of x is:

In a gas of diatomic molecules, the ratio of the two specific heats of gas CpCv is

2. In a binary solution of methyl alcohol and water, if the mass of methyl alcohol and water is 48g and 81g respectively, then the mole fraction of methyl alcohol in the solution is (a)0.5 (b) 0.25 (c) 0.33 (d)0.15

what are the products obtained1. acetamide + sodalime=?2.acetamide + PCl5=?3. acetamide + hot concentrated H2SO4=?

Calculate enthalpy change for the change 8S(g)→S8(g)′ given thatH2S2(g)→2H(g)+2S(g),ΔH=239.0 k cal mol−1H2S2(g)→2H(g)+S(g),ΔH=175.0 k cal mol−1

What is the ratio of the energies of two radiations in which one has a wavelength of 6000 ∘A the other has a wavelength of 2000 ∘A?

The orbital diagram in which the aufbau principle is not violated:

Amongst the following elements (whose electronic configurations are given below), the one having the highest ionisation energy is