46295 + Interview Questions in Chemistry

1.	Which of the following evolves carbon dioxide on oxidation with periodate?
Answer» Which of the following evolves carbon dioxide on oxidation with periodate?

Discussion

2.	The first ionization potential of Al is smaller than that of Mg because
Answer» The first ionization potential of Al is smaller than that of Mg because

Discussion

3.	11. Caro's and marshal's acid formula with their oxidation state of every atom.
Answer» 11. Caro's and marshal's acid formula with their oxidation state of every atom.

Discussion

4.	The reaction of water gas (CO+H_2) +H_2 673K 300 atm in presence of catalyst Cr_2O_3/ZnO is used for manufacture of 1.HCHO 2.HCOOH 3.CH_3OH 4.CH_3COOH
Answer» The reaction of water gas (CO+H_2) +H_2 673K 300 atm in presence of catalyst Cr_2O_3/ZnO is used for manufacture of 1.HCHO 2.HCOOH 3.CH_3OH 4.CH_3COOH

Discussion

5.	At same temperature, hydrogen is more soluble in water than helium. Which of them has higher value of KH and why?
Answer» At same temperature, hydrogen is more soluble in water than helium. Which of them has higher value of K_Hand why?

Discussion

6.	Which of the following will undergo a faster SN2?
Answer» Which of the following will undergo a faster $S_{N} 2$ ?

Discussion

7.	The only correct combination for thermosetting polymer
Answer» The only correct combination for thermosetting polymer

Discussion

8.	36.40% w/w of solution is present by w/w the overall volume of solution is 1 litre the density is 1.2 gm/l . How much mass of solute is present in 1 litre of solution
Answer» 36.40% w/w of solution is present by w/w the overall volume of solution is 1 litre the density is 1.2 gm/l . How much mass of solute is present in 1 litre of solution

Discussion

9.	Molecular formula of chromite is:
Answer» Molecular formula of chromite is:

Discussion

10.	20 CH2=CH-COOH. ____HBR_________= X FIND X
Answer» 20 CH2=CH-COOH. ____HBR_________= X FIND X

Discussion

11.	In the contact process, SO3 is dissolved in concentrated Sulphuric acid to produce:
Answer» In the contact process, $S O_{3}$ is dissolved in concentrated Sulphuric acid to produce:

Discussion

12.	Assertion: Higher the charge density on the central ion,greater will be the stability of the complex Reason:Hard acid show a greater tendency for forming complexes with hard ligands such as F^{
Answer» Assertion: Higher the charge density on the central ion,greater will be the stability of the complex Reason:Hard acid show a greater tendency for forming complexes with hard ligands such as F^{

Discussion

13.	The increase in internal energy of 1 kg of water at 1000C when it is converted into steam at the same temperture and at 1 atm (100 kPa) will be: (The density of water and steam are 1000kg/m3 and 0.6kg/m3 respectively. The latent heat of vapourisation of water is 2.25 106 J/kg.)
Answer» The increase in internal energy of 1 kg of water at $100^{0} C$ when it is converted into steam at the same temperture and at 1 atm (100 kPa) will be: (The density of water and steam are $1000 k g / m^{3}$ and $0.6 k g / m^{3}$ respectively. The latent heat of vapourisation of water is 2.25 $10^{6}$ J/kg.)

Discussion

14.	How sicl4 hydrolysis and not ccl4 ?
Answer» How sicl4 hydrolysis and not ccl4 ?

Discussion

15.	ntA mixture of potassium chlorate, oxalic acid and Sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation numbern nt(1) Cln nt(2) Cn nt(3) Sn nt(4) Hn
Answer» ntA mixture of potassium chlorate, oxalic acid and Sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation numbern nt(1) Cln nt(2) Cn nt(3) Sn nt(4) Hn

Discussion

16.	When 12.2 g of benzoic acid is dissolved in 100 g of water, the freezing point of solution was found to be −0.93oC(Kf(H2O)=1.86 K kg mol−1). Then the number (n) of benzoic acid molecules associated (assuming 100% association) is
Answer» When 12.2 g of benzoic acid is dissolved in 100 g of water, the freezing point of solution was found to be $- {0.93}^{o} C (K_{f} (H_{2} O) = 1.86 K k g m o l^{- 1})$ . Then the number (n) of benzoic acid molecules associated (assuming 100% association) is

Discussion

17.	Cylindricalpiece of cork of density of base area Aand height hfloats in a liquid of density.The cork is depressed slightly and then released. Show that the corkoscillates up and down simple harmonically with a periodwhere ρ isthe density of cork. (Ignore damping due to viscosity of the liquid).
Answer» Cylindrical piece of cork of density of base area A and height h floats in a liquid of density. The cork is depressed slightly and then released. Show that the cork oscillates up and down simple harmonically with a period where ρ is the density of cork. (Ignore damping due to viscosity of the liquid).

17.

Cylindricalpiece of cork of density of base area Aand height hfloats in a liquid of density.The cork is depressed slightly and then released. Show that the corkoscillates up and down simple harmonically with a periodwhere ρ isthe density of cork. (Ignore damping due to viscosity of the liquid).

Answer»

Cylindrical
piece of cork of density of base area A
and height h
floats in a liquid of density.
The cork is depressed slightly and then released. Show that the cork
oscillates up and down simple harmonically with a period

where ρ is
the density of cork. (Ignore damping due to viscosity of the liquid).

Discussion

18.	A solution prepared by dissolving 10 g of a protein in 100 cm3 of aqueous solution has an osmotic pressure of 76mm Hg at 300 K Calculate the molar mass of the protein in kg mol−1
Answer» A solution prepared by dissolving $10 g$ of a protein in $100 c m^{3}$ of aqueous solution has an osmotic pressure of $76 m m H g at 300 K$ Calculate the molar mass of the protein in $k g m o l^{- 1}$

Discussion

19.	Why sixth period has 32 elements ? Explain in terms of principal quantum no. , Azimuthal quantum no.
Answer» Why sixth period has 32 elements ? Explain in terms of principal quantum no. , Azimuthal quantum no.

Discussion

20.	1 mole of a gas occupying 3 litres volume is expanded against a constant external pressure of 1 atmosphere to a volume of 15 litre calculate the work done by the system
Answer» 1 mole of a gas occupying 3 litres volume is expanded against a constant external pressure of 1 atmosphere to a volume of 15 litre calculate the work done by the system

Discussion

21.	Element M + N2 H2O−−→ NH3 Element M belong to group 13 can be
Answer» Element M + $N_{2}$ $H_{2} O - - \to$ $N H_{3}$ Element M belong to group 13 can be

Discussion

22.	The order of the oxidation state of the phosphorous atom in H3PO2,H3PO4,H3PO3 and H4P2O6 is:
Answer» The order of the oxidation state of the phosphorous atom in $H_{3} P O_{2}, H_{3} P O_{4}, H_{3} P O_{3}$ and $H_{4} P_{2} O_{6}$ is:

Discussion

23.	When an electric current is passed through acidulated water, 112 mL of hydrogen gas at NTP collects at the cathode in 965 sec. The current passes, in ampere is
Answer» When an electric current is passed through acidulated water, $112 mL$ of hydrogen gas at NTP collects at the cathode in $965 sec$ . The current passes, in ampere is

Discussion

24.	The blue colour developed during Lassaigne’s test for N is due to
Answer» The blue colour developed during Lassaigne’s test for N is due to

Discussion

25.	Consider a body centered cubic (BCC) arrangement, let de,dfd,dbd be the distances between successive atoms located along the edge, the face-diagonal, the body diagonal respectively in a unit cell. Their order is given by
Answer» Consider a body centered cubic (BCC) arrangement, let $d_{e}, d_{f d}, d_{b d}$ be the distances between successive atoms located along the edge, the face-diagonal, the body diagonal respectively in a unit cell. Their order is given by

Discussion

26.	Which one of the following explains light both as a stream of particles and as wave motion?
Answer» Which one of the following explains light both as a stream of particles and as wave motion?

Discussion

27.	The correct order of rates of solvolysis of the following compounds is:
Answer» The correct order of rates of solvolysis of the following compounds is:

Discussion

28.	Number of moles of AgCl that can be dissolved in 10 liter of 2.7 M of NH3: (Ksp of AgCl and K of [Ag(NH3)2]+ are 1.0×10−10 M2 and 1.6×107 M−2 respectively)
Answer» Number of moles of $A g C l$ that can be dissolved in 10 liter of 2.7 M of $N H_{3}$ : $(K_{s p} o f A g C l a n d K o f [A g (N H_{3})_{2}]^{+} a r e 1.0 \times 10^{- 10} M^{2} a n d 1.6 \times 10^{7} M^{- 2} r e s p e c t i v e l y)$

Discussion

29.	The composition of a sample of wustite (ore of Fe) is Fe0.93 O1.00. What percentage of the iron is present in the form of Fe(III)?
Answer» The composition of a sample of wustite (ore of Fe) is $F e_{0.93}$ $O_{1.00}$ . What percentage of the iron is present in the form of Fe(III)?

Discussion

30.	18. For dissociation reaction:N2O4(g)=2NO2(g),the degree of dissociation in terms of Kp and total equilibrium pressure P??
Answer» 18. For dissociation reaction:N2O4(g)=2NO2(g),the degree of dissociation in terms of Kp and total equilibrium pressure P??

Discussion

31.	Question 56Carbon dioxide is necessary for plants. Why do we consider it as a pollutant?
Answer» Question 56 Carbon dioxide is necessary for plants. Why do we consider it as a pollutant?

Discussion

32.	Find the roots of the equation 5x2–6x–2=0 by completing the square method.
Answer» Find the roots of the equation $5 x^{2} - 6 x - 2 = 0$ by completing the square method.

Discussion

33.	The major product of the following reaction:
Answer» The major product of the following reaction:

Discussion

34.	Theoritically the No. of geometrical isomersexpected for octahedral complex \lbrack Mabcdef\rbrack is:-(1) Zero (2) 30 (3) 15 (4) 9
Answer» Theoritically the No. of geometrical isomersexpected for octahedral complex \lbrack Mabcdef\rbrack is:-(1) Zero (2) 30 (3) 15 (4) 9

Discussion

35.	The volume strength of 1.5 N H2O2 is
Answer» The volume strength of 1.5 N $H_{2}$ $O_{2}$ is

Discussion

36.	Assertion: If s†an dard reduction potential for the reaction Ag^++e^-→ Ag is 0.80V, then for the reaction 2Ag^++2e^-→2Ag, it will be 1.60V. Reason: If concentration of Ag^+ions is doubled, the electrode potential is also doubled.
Answer» Assertion: If s†an dard reduction potential for the reaction Ag^++e^-→ Ag is 0.80V, then for the reaction 2Ag^++2e^-→2Ag, it will be 1.60V. Reason: If concentration of Ag^+ions is doubled, the electrode potential is also doubled.

Discussion

37.	50.What should be the order of 2nd and 3rd period elements of electron affinity with reason
Answer» 50.What should be the order of 2nd and 3rd period elements of electron affinity with reason

Discussion

38.	The maximum number of points into which 8 circles and 8 straight lines interest is (a)212 (b)128 (c)184 (4)156
Answer» The maximum number of points into which 8 circles and 8 straight lines interest is (a)212 (b)128 (c)184 (4)156

Discussion

39.	The pair of species having identical shapes for molecules of both species is:
Answer» The pair of species having identical shapes for molecules of both species is:

Discussion

40.	Why is formic acid more acidic than benzoic acid even though the conjugate base of benzoic acid is stabilized by resonance?
Answer» Why is formic acid more acidic than benzoic acid even though the conjugate base of benzoic acid is stabilized by resonance?

Discussion

41.	Which among the following is likely to show geometrical isomerism?
Answer» Which among the following is likely to show geometrical isomerism?

Discussion

42.	Jahn-Teller effect not observed in high spin complexes of :-
Answer» Jahn-Teller effect not observed in high spin complexes of :-

Discussion

43.	Select the reagent that will bring about the following reaction:
Answer» Select the reagent that will bring about the following reaction:

43.

Select the reagent that will bring about the following reaction:

Answer»

Select the reagent that will bring about the following reaction:

Discussion

44.	2CuI→Cu+CuI2, the reaction is
Answer» $2 C u I \to C u + C u I_{2}$ , the reaction is

Discussion

45.	Iodoethane reacts with sodium is the presence of dry ether. What is the product formed?
Answer» Iodoethane reacts with sodium is the presence of dry ether. What is the product formed?

Discussion

46.	Benzene is oxidized in presence of V2O5 at 773 K, we get an anhydride along with CO2 and H2O. What will be the gram molecular mass (in g)of the anhydride?
Answer» Benzene is oxidized in presence of $V_{2} O_{5}$ at $773 K$ , we get an anhydride along with $C O_{2}$ and $H_{2} O$ . What will be the gram molecular mass $(in g)$ of the anhydride?

Discussion

47.	39. if B is doped with Si (a) n-type semiconductor is formed (b) p-type semiconductor is formed (c) insulator is formed (d) polymer is formed
Answer» 39. if B is doped with Si (a) n-type semiconductor is formed (b) p-type semiconductor is formed (c) insulator is formed (d) polymer is formed

Discussion

48.	The enthalpy of atomisation for the reaction CH4(g)→C(g)+4H(g) is1665 kJ mol−1. What is the bond energy of C—H bond?
Answer» The enthalpy of atomisation for the reaction $C H_{4} (g) \to C (g) + 4 H (g) is 1665 k J m o l^{- 1}$ . What is the bond energy of C—H bond?

Discussion

49.	An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of hydrocarbon has one chlorine atom only, then chlorine atoms present in 1 g of chlorohydrocarbon are: Atomic weight of Cl=35.5 uAvogadro constant, NA=6.023×1023
Answer» An unknown chlorohydrocarbon has $3.55 %$ of chlorine. If each molecule of hydrocarbon has one chlorine atom only, then chlorine atoms present in $1 g$ of chlorohydrocarbon are: $Atomic weight of C l = 35.5 u$ Avogadro constant, $N_{A} = 6.023 \times 10^{23}$

Discussion

50.	Which of the following polymers, need atleast one diene monomer for their preparation? (a) Dacron (b) Buna-S (c) Neoprene (d) Novolac
Answer» Which of the following polymers, need atleast one diene monomer for their preparation? (a) Dacron (b) Buna-S (c) Neoprene (d) Novolac

50.

Which of the following polymers, need atleast one diene monomer for their preparation? (a) Dacron (b) Buna-S (c) Neoprene (d) Novolac

Answer»

Which of the following polymers, need atleast one diene monomer for their preparation?

(a) Dacron

(b) Buna-S

(c) Neoprene

(d) Novolac

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following evolves carbon dioxide on oxidation with periodate?

The first ionization potential of Al is smaller than that of Mg because

11. Caro's and marshal's acid formula with their oxidation state of every atom.

The reaction of water gas (CO+H_2) +H_2 673K 300 atm in presence of catalyst Cr_2O_3/ZnO is used for manufacture of 1.HCHO 2.HCOOH 3.CH_3OH 4.CH_3COOH

At same temperature, hydrogen is more soluble in water than helium. Which of them has higher value of KH and why?

Which of the following will undergo a faster SN2?

The only correct combination for thermosetting polymer

36.40% w/w of solution is present by w/w the overall volume of solution is 1 litre the density is 1.2 gm/l . How much mass of solute is present in 1 litre of solution

Molecular formula of chromite is:

20 CH2=CH-COOH. ____HBR_________= X FIND X

In the contact process, SO3 is dissolved in concentrated Sulphuric acid to produce:

Assertion: Higher the charge density on the central ion,greater will be the stability of the complex Reason:Hard acid show a greater tendency for forming complexes with hard ligands such as F^{

The increase in internal energy of 1 kg of water at 1000C when it is converted into steam at the same temperture and at 1 atm (100 kPa) will be: (The density of water and steam are 1000kg/m3 and 0.6kg/m3 respectively. The latent heat of vapourisation of water is 2.25 106 J/kg.)

How sicl4 hydrolysis and not ccl4 ?

ntA mixture of potassium chlorate, oxalic acid and Sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation numbern nt(1) Cln nt(2) Cn nt(3) Sn nt(4) Hn

When 12.2 g of benzoic acid is dissolved in 100 g of water, the freezing point of solution was found to be −0.93oC(Kf(H2O)=1.86 K kg mol−1). Then the number (n) of benzoic acid molecules associated (assuming 100% association) is

Cylindricalpiece of cork of density of base area Aand height hfloats in a liquid of density.The cork is depressed slightly and then released. Show that the corkoscillates up and down simple harmonically with a periodwhere ρ isthe density of cork. (Ignore damping due to viscosity of the liquid).

A solution prepared by dissolving 10 g of a protein in 100 cm3 of aqueous solution has an osmotic pressure of 76mm Hg at 300 K Calculate the molar mass of the protein in kg mol−1

Why sixth period has 32 elements ? Explain in terms of principal quantum no. , Azimuthal quantum no.

1 mole of a gas occupying 3 litres volume is expanded against a constant external pressure of 1 atmosphere to a volume of 15 litre calculate the work done by the system

Element M + N2 H2O−−→ NH3 Element M belong to group 13 can be

The order of the oxidation state of the phosphorous atom in H3PO2,H3PO4,H3PO3 and H4P2O6 is:

When an electric current is passed through acidulated water, 112 mL of hydrogen gas at NTP collects at the cathode in 965 sec. The current passes, in ampere is

The blue colour developed during Lassaigne’s test for N is due to

Consider a body centered cubic (BCC) arrangement, let de,dfd,dbd be the distances between successive atoms located along the edge, the face-diagonal, the body diagonal respectively in a unit cell. Their order is given by

Which one of the following explains light both as a stream of particles and as wave motion?

The correct order of rates of solvolysis of the following compounds is:

Number of moles of AgCl that can be dissolved in 10 liter of 2.7 M of NH3: (Ksp of AgCl and K of [Ag(NH3)2]+ are 1.0×10−10 M2 and 1.6×107 M−2 respectively)

The composition of a sample of wustite (ore of Fe) is Fe0.93 O1.00. What percentage of the iron is present in the form of Fe(III)?

18. For dissociation reaction:N2O4(g)=2NO2(g),the degree of dissociation in terms of Kp and total equilibrium pressure P??

Question 56Carbon dioxide is necessary for plants. Why do we consider it as a pollutant?

Find the roots of the equation 5x2–6x–2=0 by completing the square method.

The major product of the following reaction:

Theoritically the No. of geometrical isomersexpected for octahedral complex \lbrack Mabcdef\rbrack is:-(1) Zero (2) 30 (3) 15 (4) 9

The volume strength of 1.5 N H2O2 is

Assertion: If s†an dard reduction potential for the reaction Ag^++e^-→ Ag is 0.80V, then for the reaction 2Ag^++2e^-→2Ag, it will be 1.60V. Reason: If concentration of Ag^+ions is doubled, the electrode potential is also doubled.

50.What should be the order of 2nd and 3rd period elements of electron affinity with reason

The maximum number of points into which 8 circles and 8 straight lines interest is (a)212 (b)128 (c)184 (4)156

The pair of species having identical shapes for molecules of both species is:

Why is formic acid more acidic than benzoic acid even though the conjugate base of benzoic acid is stabilized by resonance?

Which among the following is likely to show geometrical isomerism?

Jahn-Teller effect not observed in high spin complexes of :-

Select the reagent that will bring about the following reaction:

2CuI→Cu+CuI2, the reaction is

Iodoethane reacts with sodium is the presence of dry ether. What is the product formed?

Benzene is oxidized in presence of V2O5 at 773 K, we get an anhydride along with CO2 and H2O. What will be the gram molecular mass (in g)of the anhydride?

39. if B is doped with Si (a) n-type semiconductor is formed (b) p-type semiconductor is formed (c) insulator is formed (d) polymer is formed

The enthalpy of atomisation for the reaction CH4(g)→C(g)+4H(g) is1665 kJ mol−1. What is the bond energy of C—H bond?

An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of hydrocarbon has one chlorine atom only, then chlorine atoms present in 1 g of chlorohydrocarbon are: Atomic weight of Cl=35.5 uAvogadro constant, NA=6.023×1023

Which of the following polymers, need atleast one diene monomer for their preparation? (a) Dacron (b) Buna-S (c) Neoprene (d) Novolac

20 CH2=CH-COOH. HBR_____= X FIND X