46295 + Interview Questions in Chemistry

1.	Consider a system consisting of one mole of a diatomic gas, contained in a piston. What is the temperature change of the gas, if q=50 J and W=−100 J?
Answer» Consider a system consisting of one mole of a diatomic gas, contained in a piston. What is the temperature change of the gas, if $q = 50 J a n d W = - 100 J$ ?

Discussion

2.	34. For the following 3 step conversion of A to B,the appropriate sequence of reaction is A)MnO2;(CH2OH)2/P-TSA;PCC B)PCC;MnO2;(CH2OH)2/P-TSA C)PCC;(CH2OH)2/P-TSA;Jones reagent 4)Jones reagent ;(CH2OH)2/P-TSA;MnO2
Answer» 34. For the following 3 step conversion of A to B,the appropriate sequence of reaction is A)MnO2;(CH2OH)2/P-TSA;PCC B)PCC;MnO2;(CH2OH)2/P-TSA C)PCC;(CH2OH)2/P-TSA;Jones reagent 4)Jones reagent ;(CH2OH)2/P-TSA;MnO2

Discussion

3.	Which of the following order is incorrect for the rate of E2 reaction?
Answer» Which of the following order is incorrect for the rate of $E_{2}$ reaction?

Discussion

4.	what is the formula of the fiollowing: a)Acetone b)Acetaldehyde c)Ethyl Alcohol d)Formaldehyde
Answer» what is the formula of the fiollowing: a)Acetone b)Acetaldehyde c)Ethyl Alcohol d)Formaldehyde

Discussion

5.	A mixture of NH3(g) and N2H4(g) is placed in a sealed container at 27 ∘C, 0.5 atm. After complete decomposition of NH3 and N2H4 at 927 ∘C the total pressure is reached to 4.5 atm. The decomposition reactions are as follow: 2NH3(g)→N2(g)+3H2(g)N2H4(g)→N2(g)+2H2(g) The percentage of NH3 (by mole) is:
Answer» A mixture of $N H_{3} (g)$ and $N_{2} H_{4} (g)$ is placed in a sealed container at $27^{\circ} C$ , $0.5 atm$ . After complete decomposition of $N H_{3}$ and $N_{2} H_{4}$ at $927^{\circ} C$ the total pressure is reached to $4.5 atm$ . The decomposition reactions are as follow: $2 N H_{3} (g) \to N_{2} (g) + 3 H_{2} (g) N_{2} H_{4} (g) \to N_{2} (g) + 2 H_{2} (g)$ The percentage of $N H_{3}$ (by mole) is:

Discussion

6.	Viscosity of a liquid arises due to strong intermolecular forces existing between the molecules. Stronger the intermolecular forces, greater is the viscosity. Name the intermolecular forces existing in the following liquids and arrange them in the increasing order of their viscosities. Also give reason for the assigned order in one line. Water, hexane (CH3CH2CH2CH2CH2CH3) glycerine (CH2OHCH(OH)CH2OH)
Answer» Viscosity of a liquid arises due to strong intermolecular forces existing between the molecules. Stronger the intermolecular forces, greater is the viscosity. Name the intermolecular forces existing in the following liquids and arrange them in the increasing order of their viscosities. Also give reason for the assigned order in one line. Water, hexane $(C H_{3} C H_{2} C H_{2} C H_{2} C H_{2} C H_{3})$ glycerine $(C H_{2} O H C H (O H) C H_{2} O H)$

6.

Viscosity of a liquid arises due to strong intermolecular forces existing between the molecules. Stronger the intermolecular forces, greater is the viscosity. Name the intermolecular forces existing in the following liquids and arrange them in the increasing order of their viscosities. Also give reason for the assigned order in one line. Water, hexane (CH3CH2CH2CH2CH2CH3) glycerine (CH2OHCH(OH)CH2OH)

Answer»

Viscosity of a liquid arises due to strong intermolecular forces existing between the molecules. Stronger the intermolecular forces, greater is the viscosity. Name the intermolecular forces existing in the following liquids and arrange them in the increasing order of their viscosities. Also give reason for the assigned order in one line.

Water, hexane $(C H_{3} C H_{2} C H_{2} C H_{2} C H_{2} C H_{3})$ glycerine $(C H_{2} O H C H (O H) C H_{2} O H)$

Discussion

7.	What is the ratio of octahedral holes to the number of anions in hexagonal closed packed structure ?
Answer» What is the ratio of octahedral holes to the number of anions in hexagonal closed packed structure ?

Discussion

8.	Which of the following set of orbitals have n+l=7
Answer» Which of the following set of orbitals have $n + l = 7$

Discussion

9.	Accountfor the following:(i) pKbof aniline is more than thatof methylamine.(ii) Ethylamine is soluble in waterwhereas aniline is not.(iii) Methylaminein water reacts with ferric chloride to precipitate hydrated ferricoxide.(iv) Althoughamino group is o,p− directingin aromatic electrophilic substitution reactions, aniline onnitration gives a substantial amount of m-nitroaniline.(v) Aniline does not undergoFriedel-Crafts reaction.(vi) Diazoniumsalts of aromatic amines are more stable than those of aliphaticamines.(vii) Gabriel phthalimide synthesis ispreferred for synthesising primary amines.
Answer» Account for the following: (i) pK_bof aniline is more than that of methylamine. (ii) Ethylamine is soluble in water whereas aniline is not. (iii) Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide. (iv) Although amino group is o, p− directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline. (v) Aniline does not undergo Friedel-Crafts reaction. (vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines. (vii) Gabriel phthalimide synthesis is preferred for synthesising primary amines.

9.

Accountfor the following:(i) pKbof aniline is more than thatof methylamine.(ii) Ethylamine is soluble in waterwhereas aniline is not.(iii) Methylaminein water reacts with ferric chloride to precipitate hydrated ferricoxide.(iv) Althoughamino group is o,p− directingin aromatic electrophilic substitution reactions, aniline onnitration gives a substantial amount of m-nitroaniline.(v) Aniline does not undergoFriedel-Crafts reaction.(vi) Diazoniumsalts of aromatic amines are more stable than those of aliphaticamines.(vii) Gabriel phthalimide synthesis ispreferred for synthesising primary amines.

Answer»

Account
for the following:

(i)
pK_bof aniline is more than that
of methylamine.

(ii)
Ethylamine is soluble in water
whereas aniline is not.

(iii) Methylamine
in water reacts with ferric chloride to precipitate hydrated ferric
oxide.

(iv) Although
amino group is o,
p− directing
in aromatic electrophilic substitution reactions, aniline on
nitration gives a substantial amount of m-nitroaniline.

(v)
Aniline does not undergo
Friedel-Crafts reaction.

(vi) Diazonium
salts of aromatic amines are more stable than those of aliphatic
amines.

(vii)
Gabriel phthalimide synthesis is
preferred for synthesising primary amines.

Discussion

10.	Q why 2 chlorobu†an e on reaction with NaI in acetone gives racemic mixture
Answer» Q why 2 chlorobu†an e on reaction with NaI in acetone gives racemic mixture

Discussion

11.	22. Assertion : Freezing point of neopentane is more than that of n- pentane. Reason: increase in van der waals forces increases freezing point.
Answer» 22. Assertion : Freezing point of neopentane is more than that of n- pentane. Reason: increase in van der waals forces increases freezing point.

Discussion

12.	2M of100mL Na2SO4 is mixed with 3M of100mLNaCl solution 1M of200 mL CaCl2 solution then,the ratio of the concentration of cation and anion is
Answer» 2M of100mL Na2SO4 is mixed with 3M of100mLNaCl solution 1M of200 mL CaCl2 solution then,the ratio of the concentration of cation and anion is

Discussion

13.	The actual mass of a molecule of carbon dioxide is
Answer» The actual mass of a molecule of carbon dioxide is

Discussion

14.	Zeigler-Natta catalyst is used in the preparation of:
Answer» Zeigler-Natta catalyst is used in the preparation of:

Discussion

15.	Prove (AintersectB)'=A'UB'
Answer» Prove (AintersectB)'=A'UB'

Discussion

16.	What is mod? Explain in detail.
Answer» What is mod? Explain in detail.

Discussion

17.	What is the increasing order of equivalent weights of the following oxidising agents?(i) KMnO4⟶Mn2+(ii) K2Cr2O7⟶Cr3+(iii) KClO3⟶Cl−[Atomic wt.:K=39,Cr=52,Mn=55,Cl=35.5,O=16]
Answer» What is the increasing order of equivalent weights of the following oxidising agents? (i) $K M n O_{4} ⟶ M n^{2 +}$ (ii) $K_{2} C r_{2} O_{7} ⟶ C r^{3 +}$ (iii) $K C l O_{3} ⟶ C l^{-}$ [Atomic wt.: $K = 39, C r = 52, M n = 55, C l = 35.5, O = 16$ ]

Discussion

18.	Propanamide on treatment with bromine in an aqueous solution of sodium hydroxide gives:
Answer» Propanamide on treatment with bromine in an aqueous solution of sodium hydroxide gives:

Discussion

19.	5g of MnO2 on Rx with HCl forms 1.12L of Cl2 gas at S.T.P , The percentagepurity of MnO2 is ?
Answer» 5g of MnO2 on Rx with HCl forms 1.12L of Cl2 gas at S.T.P , The percentage purity of MnO2 is ?

Discussion

20.	Number of tertiary H atoms present in (CH3)3CCH(CH3)C(CH3)2CH(CH3)2.
Answer» Number of tertiary H atoms present in (CH3)3CCH(CH3)C(CH3)2CH(CH3)2.

Discussion

21.	In fluids, is the formula of force = A) rho×area×velocity^2Or B}1/2 ×rho×area×velocity^2
Answer» In fluids, is the formula of force = A) rho×area×velocity^2 Or B}1/2 ×rho×area×velocity^2

Discussion

22.	kindly send how to calculate oxidation number of both elements in [Cr(OH)4]-
Answer» kindly send how to calculate oxidation number of both elements in [Cr(OH)4]-

Discussion

23.	4) 30.6 cm6If x 10.00.1 and y10.0 t 0.1, then 2x - 2y is equal to(1) (0.0 0.1)(2) Zero(3) (0.0 t 0.4)L
Answer» 4) 30.6 cm6If x 10.00.1 and y10.0 t 0.1, then 2x - 2y is equal to(1) (0.0 0.1)(2) Zero(3) (0.0 t 0.4)L

Discussion

24.	Urea on hydrolysis gives:
Answer» Urea on hydrolysis gives:

Discussion

25.	What is the osmotic pressure of a solution containing 3.42 g of cane sugar in 1litre solution at 27oC .Molar mass of cane sugar is 342 g.
Answer» What is the osmotic pressure of a solution containing 3.42 g of cane sugar in 1litre solution at 27^oC .Molar mass of cane sugar is 342 g.

Discussion

26.	Which of the following option is having maximum number of unpaired electron?
Answer» Which of the following option is having maximum number of unpaired electron?

Discussion

27.	resonating structures in CH2+---C6h4----OH in the given structure there is positive charge on carbon in CH
Answer» resonating structures in CH2+---C6h4----OH in the given structure there is positive charge on carbon in CH

Discussion

28.	50 1-methoxy hexene +( H2O/H+ ) Will give ?
Answer» 50 1-methoxy hexene +( H2O/H+ ) Will give ?

Discussion

29.	In which of the following octahedral complexes of Co (Z = 27) will the magnitude of Δ0 be the highest?
Answer» In which of the following octahedral complexes of $C o$ (Z = 27) will the magnitude of $Δ_{0}$ be the highest?

Discussion

30.	An atom X crystallizes in fcc unit cell having an edge length a=100√2 pm . What would be the radius of tetrahedral void present in the unit cell?
Answer» An atom X crystallizes in fcc unit cell having an edge length $a = 100 \sqrt{2} p m$ . What would be the radius of tetrahedral void present in the unit cell?

Discussion

31.	1 ml of gaseous aliphatic compound C Han Om iscompletely burnt in an excess of O2 and cooled toroom temperature. The contraction in volume is2) 1+nm(1) 1 n-m(4) (1小-訓(3) (1小-訓
Answer» 1 ml of gaseous aliphatic compound C Han Om iscompletely burnt in an excess of O2 and cooled toroom temperature. The contraction in volume is2) 1+nm(1) 1 n-m(4) (1小-訓(3) (1小-訓

Discussion

32.	The covalent alkaline earth metal halide (X=Cl, Br, I) is:
Answer» The covalent alkaline earth metal halide $(X = C l, B r, I)$ is:

Discussion

33.	The maximum number of molecules is present in(1) 15 L of water at STP(2) 15 L of H2O gas at STP(3) 15 g of ice(4) Same in all
Answer» The maximum number of molecules is present in(1) 15 L of water at STP(2) 15 L of H2O gas at STP(3) 15 g of ice(4) Same in all

Discussion

34.	Column 1: Name and formula of the compound Column 2: Name of the reaction Column 3: The major product of the reaction The only correct combination in which the reaction intermediate is nitrene:
Answer» Column 1: Name and formula of the compound Column 2: Name of the reaction Column 3: The major product of the reaction The only correct combination in which the reaction intermediate is nitrene:

34.

Column 1: Name and formula of the compound Column 2: Name of the reaction Column 3: The major product of the reaction The only correct combination in which the reaction intermediate is nitrene:

Answer»

Column 1: Name and formula of the compound

Column 2: Name of the reaction

Column 3: The major product of the reaction

The only correct combination in which the reaction intermediate is nitrene:

Discussion

35.	Two fixed charges A and B of 5 micro coloumb each are separated by a distance of 6m. C is the mid point of the line joining A and B. A charge 'Q' of (-5) micro coulomb is shot perpendicular to the line joining A and B through C with a kinetic energy of 0.06 joules. The charge Q comes to rest at a point D. The distance CD is how much?
Answer» Two fixed charges A and B of 5 micro coloumb each are separated by a distance of 6m. C is the mid point of the line joining A and B. A charge 'Q' of (-5) micro coulomb is shot perpendicular to the line joining A and B through C with a kinetic energy of 0.06 joules. The charge Q comes to rest at a point D. The distance CD is how much?

Discussion

36.	Sodium salts of sulphonated long chain alcohols or hydrocarbons are examples of:
Answer» Sodium salts of sulphonated long chain alcohols or hydrocarbons are examples of:

Discussion

37.	Which type of solid present in our nature ??
Answer» Which type of solid present in our nature ??

Discussion

38.	10 grams of 57Co kept in an open container beta-decays with a half-life of 270 days. The weight of the material inside the container after 540 days will be very nearly
Answer» $10$ grams of $^{57} C o$ kept in an open container beta-decays with a half-life of $270$ days. The weight of the material inside the container after $540$ days will be very nearly

Discussion

39.	.+m and -m. Order?Also leaving group order or method to determine which leaving group is better?
Answer» .+m and -m. Order? Also leaving group order or method to determine which leaving group is better?

Discussion

40.	What is the mass of precipitate formed when 50 ml of 16.9% (w/v) solution of AgNo3 is mixed with 50 ml of 5.8% Nacl solution
Answer» What is the mass of precipitate formed when 50 ml of 16.9% (w/v) solution of AgNo3 is mixed with 50 ml of 5.8% Nacl solution

Discussion

41.	36. What are the oxidimetric and acidimetric equivalent weights of KH(IO3)2?
Answer» 36. What are the oxidimetric and acidimetric equivalent weights of KH(IO3)2?

Discussion

42.	The reaction, CO(g)+3H2(g)⇌CH4(g)+H2O(g) is at equilibrium at 1300 K in a one litre flask. The gaseous equilibrium mixture contains 0.30 mol of CO, 0.10 mol of H2, 0.020 mol of H2O and an unknown amount of CH4 in the flask. Determine the concentration of CH4 in the mixture. The equilibrium constant, Kc, for the reaction at the given temperature is 3.90.
Answer» The reaction, $C O (g) + 3 H_{2} (g) ⇌ C H_{4} (g) + H_{2} O (g)$ is at equilibrium at $1300 K$ in a one litre flask. The gaseous equilibrium mixture contains $0.30 m o l$ of $C O, 0.10 m o l$ of $H_{2}, 0.020 m o l$ of $H_{2} O$ and an unknown amount of $C H_{4}$ in the flask. Determine the concentration of $C H_{4}$ in the mixture. The equilibrium constant, $K_{c}$ , for the reaction at the given temperature is $3.90$ .

Discussion

43.	What is meaning of disubstituted Alkane?
Answer» What is meaning of disubstituted Alkane?

Discussion

44.	27.Two identical glass bulbs are interconnected by a thin glass tube at0^° C .A gas is filled at NTP in these bulbs is placed in ice and another bulb is placed in hot bath ,then the pressure of the gas becomes 1.5times .The temperature temperature of the hot bath will be . Explain in detail Click
Answer» 27.Two identical glass bulbs are interconnected by a thin glass tube at0^° C .A gas is filled at NTP in these bulbs is placed in ice and another bulb is placed in hot bath ,then the pressure of the gas becomes 1.5times .The temperature temperature of the hot bath will be . Explain in detail Click

Discussion

45.	28. If in NH3 formation N uses its pure atomic orbital then wrong statement is :- (1) At least three bond angle are of 90 (2) Three sigma bond with identical strength (3) Lone pair will be in 2s orbital (4) Molecule will be T-shaped
Answer» 28. If in NH3 formation N uses its pure atomic orbital then wrong statement is :- (1) At least three bond angle are of 90 (2) Three sigma bond with identical strength (3) Lone pair will be in 2s orbital (4) Molecule will be T-shaped

Discussion

46.	An acidic solution of Cu+2 containing 0.4 grams of Cu+2 ions is electrolysed until all the copper is deposited. What is the volume of oxygen evolved at NTP? 70.55cc 31.75cc 64cc 32cc
Answer» An acidic solution of Cu+2 containing 0.4 grams of Cu+2 ions is electrolysed until all the copper is deposited. What is the volume of oxygen evolved at NTP? 70.55cc 31.75cc 64cc 32cc

Discussion

47.	How to decide whether an optically active compound undergoes SN1 or SN2 in presence of aq KOH?
Answer» How to decide whether an optically active compound undergoes SN1 or SN2 in presence of aq KOH?

Discussion

48.	Nature of aqueous solutions of two different amino acids 'X' and 'Y' are acidic and basic. Here 'X' and 'Y' are
Answer» Nature of aqueous solutions of two different amino acids 'X' and 'Y' are acidic and basic. Here 'X' and 'Y' are

Discussion

49.	1.00 kg of 235U undergoes fission process. If energy released per event is 200 MeV, then the total energy released is
Answer» $1.00 kg$ of $^{235} U$ undergoes fission process. If energy released per event is $200 MeV$ , then the total energy released is

Discussion

50.	Valence bond theory says that only unpaired electron of valence shell can participate in Bond formation the valence shell of carbon is 2P and in the 2P two electrons are filled and 2pz are are vacant why the electrons of 2s orbital of carbon excited and go to 2P orbital while 2s orbital is not not a valence shell of carbon
Answer» Valence bond theory says that only unpaired electron of valence shell can participate in Bond formation the valence shell of carbon is 2P and in the 2P two electrons are filled and 2pz are are vacant why the electrons of 2s orbital of carbon excited and go to 2P orbital while 2s orbital is not not a valence shell of carbon

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Consider a system consisting of one mole of a diatomic gas, contained in a piston. What is the temperature change of the gas, if q=50 J and W=−100 J?

34. For the following 3 step conversion of A to B,the appropriate sequence of reaction is A)MnO2;(CH2OH)2/P-TSA;PCC B)PCC;MnO2;(CH2OH)2/P-TSA C)PCC;(CH2OH)2/P-TSA;Jones reagent 4)Jones reagent ;(CH2OH)2/P-TSA;MnO2

Which of the following order is incorrect for the rate of E2 reaction?

what is the formula of the fiollowing: a)Acetone b)Acetaldehyde c)Ethyl Alcohol d)Formaldehyde

What is the ratio of octahedral holes to the number of anions in hexagonal closed packed structure ?

Which of the following set of orbitals have n+l=7

Q why 2 chlorobu†an e on reaction with NaI in acetone gives racemic mixture

22. Assertion : Freezing point of neopentane is more than that of n- pentane. Reason: increase in van der waals forces increases freezing point.

2M of100mL Na2SO4 is mixed with 3M of100mLNaCl solution 1M of200 mL CaCl2 solution then,the ratio of the concentration of cation and anion is

The actual mass of a molecule of carbon dioxide is

Zeigler-Natta catalyst is used in the preparation of:

Prove (AintersectB)'=A'UB'

What is mod? Explain in detail.

What is the increasing order of equivalent weights of the following oxidising agents?(i) KMnO4⟶Mn2+(ii) K2Cr2O7⟶Cr3+(iii) KClO3⟶Cl−[Atomic wt.:K=39,Cr=52,Mn=55,Cl=35.5,O=16]

Propanamide on treatment with bromine in an aqueous solution of sodium hydroxide gives:

5g of MnO2 on Rx with HCl forms 1.12L of Cl2 gas at S.T.P , The percentagepurity of MnO2 is ?

Number of tertiary H atoms present in (CH3)3CCH(CH3)C(CH3)2CH(CH3)2.

In fluids, is the formula of force = A) rho×area×velocity^2Or B}1/2 ×rho×area×velocity^2

kindly send how to calculate oxidation number of both elements in [Cr(OH)4]-

4) 30.6 cm6If x 10.00.1 and y10.0 t 0.1, then 2x - 2y is equal to(1) (0.0 0.1)(2) Zero(3) (0.0 t 0.4)L

Urea on hydrolysis gives:

What is the osmotic pressure of a solution containing 3.42 g of cane sugar in 1litre solution at 27oC .Molar mass of cane sugar is 342 g.

Which of the following option is having maximum number of unpaired electron?

resonating structures in CH2+---C6h4----OH in the given structure there is positive charge on carbon in CH

50 1-methoxy hexene +( H2O/H+ ) Will give ?

In which of the following octahedral complexes of Co (Z = 27) will the magnitude of Δ0 be the highest?

An atom X crystallizes in fcc unit cell having an edge length a=100√2 pm . What would be the radius of tetrahedral void present in the unit cell?

1 ml of gaseous aliphatic compound C Han Om iscompletely burnt in an excess of O2 and cooled toroom temperature. The contraction in volume is2) 1+nm(1) 1 n-m(4) (1小-訓(3) (1小-訓

The covalent alkaline earth metal halide (X=Cl, Br, I) is:

The maximum number of molecules is present in(1) 15 L of water at STP(2) 15 L of H2O gas at STP(3) 15 g of ice(4) Same in all

Column 1: Name and formula of the compound Column 2: Name of the reaction Column 3: The major product of the reaction The only correct combination in which the reaction intermediate is nitrene:

Sodium salts of sulphonated long chain alcohols or hydrocarbons are examples of:

Which type of solid present in our nature ??

10 grams of 57Co kept in an open container beta-decays with a half-life of 270 days. The weight of the material inside the container after 540 days will be very nearly

.+m and -m. Order?Also leaving group order or method to determine which leaving group is better?

What is the mass of precipitate formed when 50 ml of 16.9% (w/v) solution of AgNo3 is mixed with 50 ml of 5.8% Nacl solution

36. What are the oxidimetric and acidimetric equivalent weights of KH(IO3)2?

What is meaning of disubstituted Alkane?

27.Two identical glass bulbs are interconnected by a thin glass tube at0^° C .A gas is filled at NTP in these bulbs is placed in ice and another bulb is placed in hot bath ,then the pressure of the gas becomes 1.5times .The temperature temperature of the hot bath will be . Explain in detail Click

28. If in NH3 formation N uses its pure atomic orbital then wrong statement is :- (1) At least three bond angle are of 90 (2) Three sigma bond with identical strength (3) Lone pair will be in 2s orbital (4) Molecule will be T-shaped

An acidic solution of Cu+2 containing 0.4 grams of Cu+2 ions is electrolysed until all the copper is deposited. What is the volume of oxygen evolved at NTP? 70.55cc 31.75cc 64cc 32cc

How to decide whether an optically active compound undergoes SN1 or SN2 in presence of aq KOH?

Nature of aqueous solutions of two different amino acids 'X' and 'Y' are acidic and basic. Here 'X' and 'Y' are

1.00 kg of 235U undergoes fission process. If energy released per event is 200 MeV, then the total energy released is