46295 + Interview Questions in Chemistry

1.	17.10 ml of methyl acetate was taken in a flask containing 200ml of 0.1N HCl maintained at 30^° C,20ml of the reaction mixture was taken at different intervals of time and titrated with a standard alkali. The following data were obtained Time(minutes) 0 75 119 183 inf. Alkali used(ml) 19.2 24.24 26.6 29.3 42.03 [inf. -> infinite] The order of the reaction is
Answer» 17.10 ml of methyl acetate was taken in a flask containing 200ml of 0.1N HCl maintained at 30^° C,20ml of the reaction mixture was taken at different intervals of time and titrated with a standard alkali. The following data were obtained Time(minutes) 0 75 119 183 inf. Alkali used(ml) 19.2 24.24 26.6 29.3 42.03 [inf. -> infinite] The order of the reaction is

Discussion

2.	Which of the following ion will form complex with EDTA most rapidly:- (1)Bi+³ ()Cd+² (3)Zn+³ (4) Ag+
Answer» Which of the following ion will form complex with EDTA most rapidly:- (1)Bi+³ ()Cd+² (3)Zn+³ (4) Ag+

Discussion

3.	Dihydrogengas used in Haber’s process is produced by reacting methanefrom natural gas with high temperature steam. The first stage of twostage reaction involves the formation of CO and H2.In second stage, CO formed in first stage is reacted with more steamin water gas shift reaction,Ifa reaction vessel at 400°C is charged with an equimolar mixtureof CO and steam such that 4.0bar, what will be the partial pressure of H2at equilibrium? Kp=10.1 at 400°C
Answer» Dihydrogen gas used in Haber’s process is produced by reacting methane from natural gas with high temperature steam. The first stage of two stage reaction involves the formation of CO and H₂. In second stage, CO formed in first stage is reacted with more steam in water gas shift reaction, If a reaction vessel at 400°C is charged with an equimolar mixture of CO and steam such that 4.0 bar, what will be the partial pressure of H₂ at equilibrium? Kp= 10.1 at 400°C

3.

Dihydrogengas used in Haber’s process is produced by reacting methanefrom natural gas with high temperature steam. The first stage of twostage reaction involves the formation of CO and H2.In second stage, CO formed in first stage is reacted with more steamin water gas shift reaction,Ifa reaction vessel at 400°C is charged with an equimolar mixtureof CO and steam such that 4.0bar, what will be the partial pressure of H2at equilibrium? Kp=10.1 at 400°C

Answer»

Dihydrogen
gas used in Haber’s process is produced by reacting methane
from natural gas with high temperature steam. The first stage of two
stage reaction involves the formation of CO and H₂.
In second stage, CO formed in first stage is reacted with more steam
in water gas shift reaction,

If
a reaction vessel at 400°C is charged with an equimolar mixture
of CO and steam such that
4.0
bar, what will be the partial pressure of H₂
at equilibrium? Kp=
10.1 at 400°C

Discussion

4.	Relative reactivity towards SN1 reactionsfor benzyl chloride (1), P- methoxybenzyl chloride (2),P -nitro benzylchloride (3)1) C>A> B(3) B> A> C(2) B> C> A(4) A>C > B
Answer» Relative reactivity towards SN1 reactionsfor benzyl chloride (1), P- methoxybenzyl chloride (2),P -nitro benzylchloride (3)1) C>A> B(3) B> A> C(2) B> C> A(4) A>C > B

Discussion

5.	If f(x) = f(a – x) and ∫0ax fx dx=k ∫0afx dx, then k = ________________.
Answer» If f(x) = f(a – x) and $\int_{0}^{a} x f (x) d x = k \int_{0}^{a} f (x) d x,$ then k = ________________.

Discussion

6.	The missing reagent P is:
Answer» The missing reagent $P$ is:

6.

The missing reagent P is:

Answer»

The missing reagent $P$ is:

Discussion

7.	How many atoms are there in 4.85g of K2Zn3{Fe(CN6}2
Answer» How many atoms are there in 4.85g of K2Zn3{Fe(CN6}2

Discussion

8.	Tin reacts with conc. HNO3and gives
Answer» Tin reacts with conc. $H N O_{3}$ and gives

Discussion

9.	Bromine can be liberated from potassium bromide solution by the action of what?
Answer» Bromine can be liberated from potassium bromide solution by the action of what?

Discussion

10.	32.Five rods of same dimensions are stranded as shown. They have thermal conductivity k1, k2, k3, k4 and k5. When point A and C are maintained at different temperature, no heat flows through the central rod if
Answer» 32.Five rods of same dimensions are stranded as shown. They have thermal conductivity k1, k2, k3, k4 and k5. When point A and C are maintained at different temperature, no heat flows through the central rod if

Discussion

11.	In an experimaental set-up, air flows between two stations P and Q adiabatically. The direction of flow depdns on the pressure and temperature conditions maintained at P and Q. The conditions at P are 150kPa and 35K. The temperature at station Q is 300K. The following are the properties and relations pertaining to air:Specific heat at constant pressure,cp=1.005kG/kgK;Specific heat at constnat volume,cv=0.718kJ/kgK;Characteristic gas constnat,R=0.287kJ/kgKEnthalpy, h=cpT.Internal energy, u=cvT.If the air has to flow from station P to station Q, te maximum possible value of pressure in kPa at station Q is close to
Answer» In an experimaental set-up, air flows between two stations $P$ and $Q$ adiabatically. The direction of flow depdns on the pressure and temperature conditions maintained at $P$ and $Q$ . The conditions at $P$ are $150 k P a$ and $35 K$ . The temperature at station $Q$ is $300 K$ . The following are the properties and relations pertaining to air: Specific heat at constant pressure, $c_{p} = 1.005 k G / k g K;$ Specific heat at constnat volume, $c_{v} = 0.718 k J / k g K;$ Characteristic gas constnat, $R = 0.287 k J / k g K$ Enthalpy, $h = c_{p} T .$ Internal energy, $u = c_{v} T .$ If the air has to flow from station $P$ to station $Q$ , te maximum possible value of pressure in $k P a$ at station $Q$ is close to

Discussion

12.	Predict the final product in the reaction below.
Answer» Predict the final product in the reaction below.

Discussion

13.	Considering the elements B, Al, Mg and K, the correct order of their metallic character is:
Answer» Considering the elements B, Al, Mg and K, the correct order of their metallic character is:

Discussion

14.	The diameter of the circle on which the vertices of the quadrilateral lie is?
Answer» The diameter of the circle on which the vertices of the quadrilateral lie is?

Discussion

15.	KOLBES ELECTROLYSIS
Answer» KOLBES ELECTROLYSIS

Discussion

16.	3. N2O4 dissociates as N2O4 (g) - - - - >2NO2 (g) at 273 K and 2 atm pressure.The equilibrium mixture has a density of 41.What will be the degree of dissociation
Answer» 3. N2O4 dissociates as N2O4 (g) - - - - >2NO2 (g) at 273 K and 2 atm pressure.The equilibrium mixture has a density of 41.What will be the degree of dissociation

Discussion

17.	33. The reaction of alkyl halide with RCOOAg produces ?? 1. Ester 2. Ether 3. Aldehyde 4. Ketone
Answer» 33. The reaction of alkyl halide with RCOOAg produces ?? 1. Ester 2. Ether 3. Aldehyde 4. Ketone

Discussion

18.	Which of the following orders of ionic radii is correctly represented?
Answer» Which of the following orders of ionic radii is correctly represented?

Discussion

19.	Distinguish between pi bond and sigma bond.
Answer» Distinguish between pi bond and sigma bond.

Discussion

20.	In terms of band theory, what is the difference (i) Between a conductor and an insulator ? (ii) Between a conductor and a semiconductor ?
Answer» In terms of band theory, what is the difference (i) Between a conductor and an insulator ? (ii) Between a conductor and a semiconductor ?

20.

In terms of band theory, what is the difference (i) Between a conductor and an insulator ? (ii) Between a conductor and a semiconductor ?

Answer»

In terms of band theory, what is the difference

(i) Between a conductor and an insulator ?

(ii) Between a conductor and a semiconductor ?

Discussion

21.	Crystal field stabilization energy (CFSE) of Mn[(H2O)6]+2 is:
Answer» Crystal field stabilization energy (CFSE) of $M n [(H_{2} O)_{6}]^{+ 2}$ is:

Discussion

22.	Thehalf-life of is28 years. What is the disintegration rate of 15 mg of this isotope?
Answer» The half-life of is 28 years. What is the disintegration rate of 15 mg of this isotope?

Discussion

23.	In hydrogen gas, electrons are irradiated with 12.75 eV energy radiation. Find total number of spectral lines formed.
Answer» In hydrogen gas, electrons are irradiated with 12.75 eV energy radiation. Find total number of spectral lines formed.

Discussion

24.	which one of the following solutions will have highest osmotic pressure ? 1.0.1M Al2(SO4)3 2.0.1MBaCl2 3.0.1MNa2SO4 4.the solution obtained by mixing equal volumes of (2) and (3)
Answer» which one of the following solutions will have highest osmotic pressure ? 1.0.1M Al2(SO4)3 2.0.1MBaCl2 3.0.1MNa2SO4 4.the solution obtained by mixing equal volumes of (2) and (3)

Discussion

25.	12.A compound AB crystallizes IN BCC WITH EDGE LENGTH 480 pm , IF RADIUS OD B- IS 255pm then A+RADIUS IS
Answer» 12. A compound AB crystallizes IN BCC WITH EDGE LENGTH 480 pm , IF RADIUS OD B- IS 255pm then A+RADIUS IS

Discussion

26.	artificial sweaters are produced by which synthetic fibre?
Answer» artificial sweaters are produced by which synthetic fibre?

Discussion

27.	number of moles in 2 kg of electrons is
Answer» number of moles in 2 kg of electrons is

Discussion

28.	An ore is analyzed for manganese content by converting the manganese to Mn3O4 and weighed? -if a 1.52g sample yields Mn3O4 weighing 0.126g (a)what will be percent Mn2O3 in sample? (B)what is the percent of Mn?Gravimetric analysis
Answer» An ore is analyzed for manganese content by converting the manganese to Mn3O4 and weighed? -if a 1.52g sample yields Mn3O4 weighing 0.126g (a)what will be percent Mn2O3 in sample? (B)what is the percent of Mn? Gravimetric analysis

Discussion

29.	Out of Ally chloride and benzylchloride which is more active towards Sn2 reaction.
Answer» Out of Ally chloride and benzylchloride which is more active towards Sn2 reaction.

Discussion

30.	The pH value of solution in which a polar amino acids does not migrate under the influence of electric field is called
Answer» The pH value of solution in which a polar amino acids does not migrate under the influence of electric field is called

Discussion

31.	why reversible process does not lead to 100 efficiency in heat engine?
Answer» why reversible process does not lead to 100 efficiency in heat engine?

Discussion

32.	2. Which has greater atomic size among scandium and zinc?
Answer» 2. Which has greater atomic size among scandium and zinc?

Discussion

33.	Choose the correct pair for trigonometric ratios and thier respective values.
Answer» Choose the correct pair for trigonometric ratios and thier respective values.

Discussion

34.	Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. ΔHhydrogenation helps to calculate resonance energy. The heat of neutralization of CH3COOH,HCOOH,HCN and H2S are -12.8, -13.2, -3.2 and -3.9 Kcal per equivalent. Arrange these acids in increasing order of strength.
Answer» Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. $Δ_{H} h y d r o g e n a t i o n$ helps to calculate resonance energy. The heat of neutralization of $C H_{3} C O O H, H C O O H, H C N$ and $H_{2} S$ are -12.8, -13.2, -3.2 and -3.9 Kcal per equivalent. Arrange these acids in increasing order of strength.

34.

Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. ΔHhydrogenation helps to calculate resonance energy. The heat of neutralization of CH3COOH,HCOOH,HCN and H2S are -12.8, -13.2, -3.2 and -3.9 Kcal per equivalent. Arrange these acids in increasing order of strength.

Answer»

Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. $Δ_{H} h y d r o g e n a t i o n$ helps to calculate resonance energy.

The heat of neutralization of $C H_{3} C O O H, H C O O H, H C N$ and $H_{2} S$ are -12.8, -13.2, -3.2 and -3.9 Kcal per equivalent. Arrange these acids in increasing order of strength.

Discussion

35.

An aqueous solution of X is added slowly to an aqueous solution of Y as shown in List I. The variation in conductivity of these reactions is given in List II. Match list I with List II and select the correct answer using the code given below the lists : List I List II P.(C2H5)3NX+CH3COOHY1.Conductivity decreases and then increases Q.KI (0.1 M)X+AgNO3(0.01 M)Y2.Conductivity decreases and then does notchange muchR.CH3COOHX+KOHY3.Conductivity increases and then does notchange muchS.NaOHX+HIY4.Conductivity does not change much andthen increases P Q R S(A) 3 4 2 1(B) 4 3 2 1(C) 2 3 4 1(D)1432

Answer»

An aqueous solution of $X$ is added slowly to an aqueous solution of $Y$ as shown in List I. The variation in conductivity of these reactions is given in List II. Match list I with List II and select the correct answer using the code given below the lists :

	List I		List II
P.	$(C_{2} H_{5})_{3} N X + C H_{3} C O O H Y$	1.	Conductivity decreases and then increases
Q.	$K I (0.1 M) X + A g N O_{3} (0.01 M) Y$	2.	Conductivity decreases and then does notchange much
R.	$C H_{3} C O O H X + K O H Y$	3.	Conductivity increases and then does notchange much
S.	$N a O H X + H I Y$	4.	Conductivity does not change much andthen increases

	P	Q	R	S
(A)	3	4	2	1
(B)	4	3	2	1
(C)	2	3	4	1
(D)	1	4	3	2

Discussion

36.	Kf for water is 1.86∘C kg mol−1. What is the molality of a solution which freezes at −0.192∘C? Assuming no change in the solute by raising the temperature, at what temperature will the solution boil?Kb for H2O=0.515∘C kg mol−1)
Answer» $K_{f}$ for water is ${1.86}^{\circ} C k g m o l^{- 1} .$ What is the molality of a solution which freezes at $- {0.192}^{\circ} C$ ? Assuming no change in the solute by raising the temperature, at what temperature will the solution boil? $K_{b}$ for $H_{2} O = {0.515}^{\circ} C k g m o l^{- 1})$

Discussion

37.	Find the value of x such that e^x = e-1 , x € (0,1) .
Answer» Find the value of x such that e^x = e-1 , x € (0,1) .

Discussion

38.	24 1 gm of a mixture of CaCO3 and MgCO3 is reacted with access dil. HCl. Thus produced CO2 whose volume is 240 ml in S.T.P. Calculate the conjugated percentage of the mixture.
Answer» 24 1 gm of a mixture of CaCO3 and MgCO3 is reacted with access dil. HCl. Thus produced CO2 whose volume is 240 ml in S.T.P. Calculate the conjugated percentage of the mixture.

Discussion

39.	5. The Kp of a reaction is 10 atm at 300K and 4 atm at 400K. The incorrect statement about the reaction is 1. The reaction is exothermic 2. the Ea of forward reaction is more then that of backward reaction 3. The rate of backward reaction increases more than that of forward reaction with increase of temperature 4. The difference between heat of reaction ot constant pressure and that at constant volume is RT.
Answer» 5. The Kp of a reaction is 10 atm at 300K and 4 atm at 400K. The incorrect statement about the reaction is 1. The reaction is exothermic 2. the Ea of forward reaction is more then that of backward reaction 3. The rate of backward reaction increases more than that of forward reaction with increase of temperature 4. The difference between heat of reaction ot constant pressure and that at constant volume is RT.

Discussion

40.	40. Which would not react with benzene sulphonyl chloride in aqueous NaOH? Aniline,N,N-dimethylaniline,p-toluidine,N-ethyl aniline
Answer» 40. Which would not react with benzene sulphonyl chloride in aqueous NaOH? Aniline,N,N-dimethylaniline,p-toluidine,N-ethyl aniline

Discussion

41.	The pair of compounds that can exist together is
Answer» The pair of compounds that can exist together is

Discussion

42.	What is the character of carbon compound 1,3-cyclobutdiene
Answer» What is the character of carbon compound 1,3-cyclobutdiene

Discussion

43.	The equation of a travelling wave is given by Y = 10 cos(1200t- 3 x )the V particle max and v wave ratio is?
Answer» The equation of a travelling wave is given by Y = 10 cos(1200t- 3 x )the V particle max and v wave ratio is?

Discussion

44.	Why there is no angulat strain in red p4
Answer» Why there is no angulat strain in red p4

Discussion

45.	A catalyst adsorbs 100 mL of nitrogen gas at S.T.P. per gram of catalyst surface and forms as a mono-molecular layer. The effective surface area occupied by one nitrogen molecule on the surface of catalyst is 0.16×10–14 cm2 . What is the total surface area occupied by nitrogen molecules per gram of catalyst?(Given: Volume of gas at STP = 22.4 L)
Answer» A catalyst adsorbs $100$ mL of nitrogen gas at S.T.P. per gram of catalyst surface and forms as a mono-molecular layer. The effective surface area occupied by one nitrogen molecule on the surface of catalyst is $0.16 \times 10^{- 14} {cm}^{2}$ . What is the total surface area occupied by nitrogen molecules per gram of catalyst? (Given: Volume of gas at STP = 22.4 L)

Discussion

46.	Which of the following gives crimson red colour during the flame test?
Answer» Which of the following gives crimson red colour during the flame test?

Discussion

47.	The standard molar heat for formation ofethane, carbondioxide and water are respectively,-21.1,-94.1 and -68.3 kcalmol-l. What is the standard molar heat of combustion of ethane? explain how to write all equations in one form
Answer» The standard molar heat for formation ofethane, carbondioxide and water are respectively,-21.1,-94.1 and -68.3 kcalmol-l. What is the standard molar heat of combustion of ethane? explain how to write all equations in one form

Discussion

48.	chlorobenze does not under go Sn2
Answer» chlorobenze does not under go Sn2

Discussion

49.	41. 2 Hg → Hg22+, E^° = - 0.799 V Hg→ Hg2+, E = 0.855 V Equilibrium constant for the reaction Hg +Hg22+ → Hg22+ at 27^° C is (a) 89 (b) 82.3 (c) 79 (d)None of these
Answer» 41. 2 Hg → Hg22+, E^° = - 0.799 V Hg→ Hg2+, E = 0.855 V Equilibrium constant for the reaction Hg +Hg22+ → Hg22+ at 27^° C is (a) 89 (b) 82.3 (c) 79 (d)None of these

Discussion

50.	in acids the concentration of OH- ions is less then H+ ions .but how can an acid contain OH- ionare there H30+ IONS IN BASES? if yes then how?
Answer» in acids the concentration of OH- ions is less then H+ ions . but how can an acid contain OH- ion are there H30+ IONS IN BASES? if yes then how?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following ion will form complex with EDTA most rapidly:- (1)Bi+³ ()Cd+² (3)Zn+³ (4) Ag+

Relative reactivity towards SN1 reactionsfor benzyl chloride (1), P- methoxybenzyl chloride (2),P -nitro benzylchloride (3)1) C>A> B(3) B> A> C(2) B> C> A(4) A>C > B

If f(x) = f(a – x) and ∫0ax fx dx=k ∫0afx dx, then k = ________________.

The missing reagent P is:

How many atoms are there in 4.85g of K2Zn3{Fe(CN6}2

Tin reacts with conc. HNO3and gives

Bromine can be liberated from potassium bromide solution by the action of what?

32.Five rods of same dimensions are stranded as shown. They have thermal conductivity k1, k2, k3, k4 and k5. When point A and C are maintained at different temperature, no heat flows through the central rod if

Predict the final product in the reaction below.

Considering the elements B, Al, Mg and K, the correct order of their metallic character is:

The diameter of the circle on which the vertices of the quadrilateral lie is?

KOLBES ELECTROLYSIS

3. N2O4 dissociates as N2O4 (g) - - - - >2NO2 (g) at 273 K and 2 atm pressure.The equilibrium mixture has a density of 41.What will be the degree of dissociation

33. The reaction of alkyl halide with RCOOAg produces ?? 1. Ester 2. Ether 3. Aldehyde 4. Ketone

Which of the following orders of ionic radii is correctly represented?

Distinguish between pi bond and sigma bond.

In terms of band theory, what is the difference (i) Between a conductor and an insulator ? (ii) Between a conductor and a semiconductor ?

Crystal field stabilization energy (CFSE) of Mn[(H2O)6]+2 is:

Thehalf-life of is28 years. What is the disintegration rate of 15 mg of this isotope?

In hydrogen gas, electrons are irradiated with 12.75 eV energy radiation. Find total number of spectral lines formed.

which one of the following solutions will have highest osmotic pressure ? 1.0.1M Al2(SO4)3 2.0.1MBaCl2 3.0.1MNa2SO4 4.the solution obtained by mixing equal volumes of (2) and (3)

12.A compound AB crystallizes IN BCC WITH EDGE LENGTH 480 pm , IF RADIUS OD B- IS 255pm then A+RADIUS IS

artificial sweaters are produced by which synthetic fibre?

number of moles in 2 kg of electrons is

An ore is analyzed for manganese content by converting the manganese to Mn3O4 and weighed? -if a 1.52g sample yields Mn3O4 weighing 0.126g (a)what will be percent Mn2O3 in sample? (B)what is the percent of Mn?Gravimetric analysis

Out of Ally chloride and benzylchloride which is more active towards Sn2 reaction.

The pH value of solution in which a polar amino acids does not migrate under the influence of electric field is called

why reversible process does not lead to 100 efficiency in heat engine?

2. Which has greater atomic size among scandium and zinc?

Choose the correct pair for trigonometric ratios and thier respective values.

Kf for water is 1.86∘C kg mol−1. What is the molality of a solution which freezes at −0.192∘C? Assuming no change in the solute by raising the temperature, at what temperature will the solution boil?Kb for H2O=0.515∘C kg mol−1)

Find the value of x such that e^x = e-1 , x € (0,1) .

24 1 gm of a mixture of CaCO3 and MgCO3 is reacted with access dil. HCl. Thus produced CO2 whose volume is 240 ml in S.T.P. Calculate the conjugated percentage of the mixture.

40. Which would not react with benzene sulphonyl chloride in aqueous NaOH? Aniline,N,N-dimethylaniline,p-toluidine,N-ethyl aniline

The pair of compounds that can exist together is

What is the character of carbon compound 1,3-cyclobutdiene

The equation of a travelling wave is given by Y = 10 cos(1200t- 3 x )the V particle max and v wave ratio is?

Why there is no angulat strain in red p4

Which of the following gives crimson red colour during the flame test?

The standard molar heat for formation ofethane, carbondioxide and water are respectively,-21.1,-94.1 and -68.3 kcalmol-l. What is the standard molar heat of combustion of ethane? explain how to write all equations in one form

chlorobenze does not under go Sn2

41. 2 Hg → Hg22+, E^° = - 0.799 V Hg→ Hg2+, E = 0.855 V Equilibrium constant for the reaction Hg +Hg22+ → Hg22+ at 27^° C is (a) 89 (b) 82.3 (c) 79 (d)None of these

in acids the concentration of OH- ions is less then H+ ions .but how can an acid contain OH- ionare there H30+ IONS IN BASES? if yes then how?