46295 + Interview Questions in Chemistry

1.	In K4Fe(CN)6
Answer» In $K_{4} F e (C N)_{6}$

Discussion

2.	The bond angle in PH3 is:
Answer» The bond angle in PH₃ is:

Discussion

3.	Calculate the final pressure after removing partition between the two chambers having two different gases of same volume at same temperature and different pressure.[Assumption: Temperatures are equal before and after removing the partition.]Given, pressure P1=1 atm, pressure P2=2 atm
Answer» Calculate the final pressure after removing partition between the two chambers having two different gases of same volume at same temperature and different pressure. [Assumption: Temperatures are equal before and after removing the partition.] Given, pressure $P_{1} = 1 atm$ , pressure $P_{2} = 2 atm$

Discussion

4.	cyclohexene reaction with HBr in presence of CCl4
Answer» cyclohexene reaction with HBr in presence of CCl4

Discussion

5.	A person adds 1.71 g of sugar in order to sweeten his tea. The number of C atoms added are (molar mass of sugar =342):
Answer» A person adds 1.71 g of sugar in order to sweeten his tea. The number of C atoms added are (molar mass of sugar =342):

Discussion

6.	What is the taste of distilled water? Why is not potable?
Answer» What is the taste of distilled water? Why is not potable?

Discussion

7.	46. If in the periodic table 10th periods are considered then number of columns in 9th period are (1)6 (2)7 (3)5 (4)9
Answer» 46. If in the periodic table 10th periods are considered then number of columns in 9th period are (1)6 (2)7 (3)5 (4)9

Discussion

8.	Copper has face centred cubic (fcc) lattice with interatomic spacing equal to 2.54A . The value of lattice constant for this laticce
Answer» Copper has face centred cubic (fcc) lattice with interatomic spacing equal to 2.54A . The value of lattice constant for this laticce

Discussion

9.	geometrical isomerism coordination compounds is exhibited by -----complexes1) square planar and octahedral
Answer» geometrical isomerism coordination compounds is exhibited by -----complexes 1) square planar and octahedral

Discussion

10.	What is the quantum mechanical model of an atom in simple terms?
Answer» What is the quantum mechanical model of an atom in simple terms?

Discussion

11.	In the Lassaigne’stest for nitrogen in an organic compound, the Prussian blue colour isobtained due to the formation of:(a) Na4[Fe(CN)6] (b) Fe4[Fe(CN)6]3 (c) Fe2[Fe(CN)6] (d) Fe3[Fe(CN)6]4
Answer» In the Lassaigne’s test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of: (a) Na₄[Fe(CN)₆] (b) Fe₄[Fe(CN)₆]₃ (c) Fe₂[Fe(CN)₆] (d) Fe₃[Fe(CN)₆]₄

11.

In the Lassaigne’stest for nitrogen in an organic compound, the Prussian blue colour isobtained due to the formation of:(a) Na4[Fe(CN)6] (b) Fe4[Fe(CN)6]3 (c) Fe2[Fe(CN)6] (d) Fe3[Fe(CN)6]4

Answer»

In the Lassaigne’s
test for nitrogen in an organic compound, the Prussian blue colour is
obtained due to the formation of:

(a) Na₄[Fe(CN)₆]
(b) Fe₄[Fe(CN)₆]₃
(c) Fe₂[Fe(CN)₆] (d) Fe₃[Fe(CN)₆]₄

Discussion

12.	What happens during a chemical reaction?
Answer» What happens during a chemical reaction?

Discussion

13.	name of this compound: ch tripplebond c-ch=ch-ch=ch-ch3
Answer» name of this compound: ch tripplebond c-ch=ch-ch=ch-ch3

Discussion

14.	When a student added a few drops of methyl orange indicator to a colourless solution, the solution turned red. Which of the following should he add in excess so that the colour changes to yellow ?(1) NaOH solution(2) H2SO4 solution(3) Lemon juice(4) Vinegar solution
Answer» When a student added a few drops of methyl orange indicator to a colourless solution, the solution turned red. Which of the following should he add in excess so that the colour changes to yellow ? (1) NaOH solution (2) H₂SO₄ solution (3) Lemon juice (4) Vinegar solution

Discussion

15.	Which of the following reduction reaction CANNOT be carried out with coke?
Answer» Which of the following reduction reaction CANNOT be carried out with coke?

Discussion

16.	4.00 moles of N2 and 3.00 moles of H2 are allowed to react in the presence of iron as a catalyst according to the reaction:N2(g)+3H2(g)Fe→2NH3(g). The number of molecules of the gas left unreacted will be
Answer» $4.00$ moles of $N_{2}$ and $3.00$ moles of $H_{2}$ are allowed to react in the presence of iron as a catalyst according to the reaction: $N_{2} (g) + 3 H_{2} (g) F e \to 2 N H_{3} (g) .$ The number of molecules of the gas left unreacted will be

Discussion

17.	At what temperature will the volume of a gas at 273K double itself at cons†an t pressure
Answer» At what temperature will the volume of a gas at 273K double itself at cons†an t pressure

Discussion

18.	The diagram given below shows the isomeric form of
Answer» The diagram given below shows the isomeric form of

18.

The diagram given below shows the isomeric form of

Answer»

The diagram given below shows the isomeric form of

Discussion

19.	What will be the normality of a solution obtained by mixing 0.45 N and 0.60 N NaOH in the ratio 2:1 by volume?
Answer» What will be the normality of a solution obtained by mixing $0.45 N$ and $0.60 N$ $N a O H$ in the ratio $2 : 1$ by volume?

Discussion

20.	Using IUPAC norms write the formulae for the following : (i) Hexaamminecobalt(III) sulphate (ii) Potassium trioxalatochromate(III)
Answer» Using IUPAC norms write the formulae for the following : (i) Hexaamminecobalt(III) sulphate (ii) Potassium trioxalatochromate(III)

Discussion

21.	Number of carbon atom returning back to calvin cycle after photorespiration if number of RUBP undergoing photorespiration is 4 a)4 b)8 c)9 d)18 Pls explain
Answer» Number of carbon atom returning back to calvin cycle after photorespiration if number of RUBP undergoing photorespiration is 4 a)4 b)8 c)9 d)18 Pls explain

Discussion

22.	Temperature at which the rms speed of O2 is equal to that of neon at 300 K is:
Answer» Temperature at which the rms speed of $O_{2}$ is equal to that of neon at $300 K$ is:

Discussion

23.	The gas phase reaction, 2A(g)→A2(g) at 400K has ΔG∘=+25.2 kJ mol–1The equilibrium constant, KC for this reaction is ______ × 10−2 (Round off to the Nearest Integer).[Use : R=8.3 J mol–1 K–1, ln 10 = 2.3log10 2=0.30, 1 atm=1 bar][antilog (– 0.3) = 0.501]
Answer» $The gas phase reaction,$ $2 A (g) \to A_{2} (g)$ $at 400 K has Δ G^{\circ} = + 25.2 k J m o l^{- 1}$ The equilibrium constant, $K_{C}$ for this reaction is ______ × $10^{- 2}$ (Round off to the Nearest Integer). [Use : $R = 8.3 J m o l^{- 1} K^{- 1}$ , ln 10 = 2.3 $l o g_{10} 2 = 0.30, 1 a t m = 1 b a r$ ] [antilog (– 0.3) = 0.501]

Discussion

24.	5 mL of H2 gas diffuses out in 1 second from a hole. Find the volume of O2 that will diffuse out from the same hole under identical conditions in 2 seconds.
Answer» $5 mL$ of $H_{2}$ gas diffuses out in $1$ second from a hole. Find the volume of $O_{2}$ that will diffuse out from the same hole under identical conditions in $2$ seconds.

Discussion

25.	(i) What is the role of activated charcoal in gas mask? (ii) A colloidal sol is prepared by the given method in figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube? How is the solution represented? (iii) How does chemisorption vary with temperature?
Answer» (i) What is the role of activated charcoal in gas mask? (ii) A colloidal sol is prepared by the given method in figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube? How is the solution represented? (iii) How does chemisorption vary with temperature?

Discussion

26.	An oxy-acid of phosphorous is prepared by hydrolysis and oxidation of red P by NaOCl or yellow P by H2O and air. What is the basicity of the oxyacid?
Answer» An oxy-acid of phosphorous is prepared by hydrolysis and oxidation of red P by $N a O C l$ or yellow P by $H_{2} O$ and air. What is the basicity of the oxyacid?

Discussion

27.	Symmetric part of the matrix is
Answer» Symmetric part of the matrix is

Discussion

28.	42.300ml of oxygen gas at 10 degree Celsius are heated to 10 degree Celsius. What is the new volume if pressure remains constant?
Answer» 42.300ml of oxygen gas at 10 degree Celsius are heated to 10 degree Celsius. What is the new volume if pressure remains constant?

Discussion

29.	A body centered cubic lattice is made up of hollow shere of B. Sphere of solid A are present in hollow sphere of B. Radius of A is half of the radius of B. What is the ratio of total volume of sphere B unoccupied by A in unit cell and volume of unit cell?
Answer» A body centered cubic lattice is made up of hollow shere of $B$ . Sphere of solid $A$ are present in hollow sphere of $B$ . Radius of $A$ is half of the radius of $B$ . What is the ratio of total volume of sphere $B$ unoccupied by $A$ in unit cell and volume of unit cell?

Discussion

30.	Select the incorrect statementA. Boron tribromide is stronger lewis acid than boron trifluoride B. Borax has two tetrahedral and two triangular units C. B2H6.2NH3 considered as ionic product D.When diborane with excess of NH3 mixture is heated at high temperature Borazole is formed
Answer» Select the incorrect statement A. Boron tribromide is stronger lewis acid than boron trifluoride B. Borax has two tetrahedral and two triangular units C. B2H6.2NH3 considered as ionic product D.When diborane with excess of NH3 mixture is heated at high temperature Borazole is formed

Discussion

31.	Question 23 If two liquids A and B form minimum boiling azeotrope at some specific composition then (a) A-B interactions are stronger than those between A-A or B-B (b) vapour pressure of solution increases because more number of molecules of liquids A and B can escape from the solution (c) vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution (d) A-B interactions are weaker than those between A-A or B-B
Answer» Question 23 If two liquids A and B form minimum boiling azeotrope at some specific composition then (a) A-B interactions are stronger than those between A-A or B-B (b) vapour pressure of solution increases because more number of molecules of liquids A and B can escape from the solution (c) vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution (d) A-B interactions are weaker than those between A-A or B-B

Discussion

32.	Why is the reactivity of halogen atom in isopropyl chloride less reactive than in isopropyl bromide?
Answer» Why is the reactivity of halogen atom in isopropyl chloride less reactive than in isopropyl bromide?

Discussion

33.	Why amine shows more electrophillic substitution than phenol
Answer» Why amine shows more electrophillic substitution than phenol

Discussion

34.	What is meant by the term functional group?
Answer» What is meant by the term functional group?

Discussion

35.	The stability of +1 oxidation state among Al,Ga,In and TI increases in the sequence :
Answer» The stability of +1 oxidation state among $A l, G a, I n$ and $T I$ increases in the sequence :

Discussion

36.	The velocity associated with a proton moving in a potential difference of 1000 V is 4.37 × 105ms–1. If the hockey ball of mass 0.1 Kg is moving with this velocity, calculate the wavelength associated with this velocity.
Answer» The velocity associated with a proton moving in a potential difference of 1000 V is 4.37 × $10^{5} m s^{- 1}$ . If the hockey ball of mass 0.1 Kg is moving with this velocity, calculate the wavelength associated with this velocity.

Discussion

37.	Which one of the following sets of ions represents a collection of isoelectronic species?
Answer» Which one of the following sets of ions represents a collection of isoelectronic species?

Discussion

38.	The correct order of electron affinity among the following species: O, S, Se
Answer» The correct order of electron affinity among the following species: $O, S, S e$

Discussion

39.	One mole of proton each of frequency 2500Hz which have an approximately pf total energy__________?
Answer» One mole of proton each of frequency 2500Hz which have an approximately pf total energy__________?

Discussion

40.	A pure semiconductor has equal electron and hole concentration of 1016 m−3. Doping by indium increases nh to 4.5×1022 m−3.What is the value ofne in the doped semiconductor?
Answer» A pure semiconductor has equal electron and hole concentration of $10^{16} m^{- 3} .$ Doping by indium increases $n_{h}$ to $4.5 \times 10^{22} m^{- 3} .$ What is the value of $n_{e}$ in the doped semiconductor?

Discussion

41.	The compound (Z) is ?
Answer» The compound (Z) is ?

Discussion

42.	The number of atoms present in 120 amu of Ca are
Answer» The number of atoms present in 120 amu of Ca are

Discussion

43.	(i)–––––– promotes the formation of curd as it multiplies in milk and converts it into curd. Here, (i) is(i)–––––– दही के निर्माण में सहायक होता है क्योंकि यह दूध में जनन कर उसे दही में परिवर्तित कर देता है। यहाँ (i) है
Answer» $(i) - ---- -$ promotes the formation of curd as it multiplies in milk and converts it into curd. Here, (i) is $(i) - ---- -$ दही के निर्माण में सहायक होता है क्योंकि यह दूध में जनन कर उसे दही में परिवर्तित कर देता है। यहाँ (i) है

Discussion

44.	5.What is the difference between carbocation and cation.
Answer» 5.What is the difference between carbocation and cation.

Discussion

45.	36. What is meant by virial coefficient of real gas?
Answer» 36. What is meant by virial coefficient of real gas?

Discussion

46.	98.The following complex is stable or not Fe2(co)9 Fe3(Co)12 Co2(Co)8 Co4(Co)12 Ir(Co)12
Answer» 98.The following complex is stable or not Fe2(co)9 Fe3(Co)12 Co2(Co)8 Co4(Co)12 Ir(Co)12

Discussion

47.	Match the following: List IList IIi) Riboflavin p) Beri beriii) Thiamineq) Scurvyiii) Pyridoxiner) Cheilosisiv) Ascorbic acids) Convulsions
Answer» Match the following: $\begin{matrix} List I & List II i) Riboflavin & p) Beri beri ii) Thiamine & q) Scurvy iii) Pyridoxine & r) Cheilosis iv) Ascorbic acid & s) Convulsions \end{matrix}$

Discussion

48.	What happens when ammonium bromide reacts with ammonia
Answer» What happens when ammonium bromide reacts with ammonia

Discussion

49.	37.how does ethane and benzene represent law of multiple proportions?
Answer» 37.how does ethane and benzene represent law of multiple proportions?

Discussion

50.	SO2 reacts with NaOH forming
Answer» SO₂ reacts with NaOH forming

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In K4Fe(CN)6

The bond angle in PH3 is:

Calculate the final pressure after removing partition between the two chambers having two different gases of same volume at same temperature and different pressure.[Assumption: Temperatures are equal before and after removing the partition.]Given, pressure P1=1 atm, pressure P2=2 atm

cyclohexene reaction with HBr in presence of CCl4

A person adds 1.71 g of sugar in order to sweeten his tea. The number of C atoms added are (molar mass of sugar =342):

What is the taste of distilled water? Why is not potable?

46. If in the periodic table 10th periods are considered then number of columns in 9th period are (1)6 (2)7 (3)5 (4)9

Copper has face centred cubic (fcc) lattice with interatomic spacing equal to 2.54A . The value of lattice constant for this laticce

geometrical isomerism coordination compounds is exhibited by -----complexes1) square planar and octahedral

What is the quantum mechanical model of an atom in simple terms?

In the Lassaigne’stest for nitrogen in an organic compound, the Prussian blue colour isobtained due to the formation of:(a) Na4[Fe(CN)6] (b) Fe4[Fe(CN)6]3 (c) Fe2[Fe(CN)6] (d) Fe3[Fe(CN)6]4

What happens during a chemical reaction?

name of this compound: ch tripplebond c-ch=ch-ch=ch-ch3

When a student added a few drops of methyl orange indicator to a colourless solution, the solution turned red. Which of the following should he add in excess so that the colour changes to yellow ?(1) NaOH solution(2) H2SO4 solution(3) Lemon juice(4) Vinegar solution

Which of the following reduction reaction CANNOT be carried out with coke?

4.00 moles of N2 and 3.00 moles of H2 are allowed to react in the presence of iron as a catalyst according to the reaction:N2(g)+3H2(g)Fe→2NH3(g). The number of molecules of the gas left unreacted will be

At what temperature will the volume of a gas at 273K double itself at cons†an t pressure

The diagram given below shows the isomeric form of

What will be the normality of a solution obtained by mixing 0.45 N and 0.60 N NaOH in the ratio 2:1 by volume?

Using IUPAC norms write the formulae for the following : (i) Hexaamminecobalt(III) sulphate (ii) Potassium trioxalatochromate(III)

Number of carbon atom returning back to calvin cycle after photorespiration if number of RUBP undergoing photorespiration is 4 a)4 b)8 c)9 d)18 Pls explain

Temperature at which the rms speed of O2 is equal to that of neon at 300 K is:

The gas phase reaction, 2A(g)→A2(g) at 400K has ΔG∘=+25.2 kJ mol–1The equilibrium constant, KC for this reaction is ______ × 10−2 (Round off to the Nearest Integer).[Use : R=8.3 J mol–1 K–1, ln 10 = 2.3log10 2=0.30, 1 atm=1 bar][antilog (– 0.3) = 0.501]

5 mL of H2 gas diffuses out in 1 second from a hole. Find the volume of O2 that will diffuse out from the same hole under identical conditions in 2 seconds.

(i) What is the role of activated charcoal in gas mask? (ii) A colloidal sol is prepared by the given method in figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube? How is the solution represented? (iii) How does chemisorption vary with temperature?

An oxy-acid of phosphorous is prepared by hydrolysis and oxidation of red P by NaOCl or yellow P by H2O and air. What is the basicity of the oxyacid?

Symmetric part of the matrix is

42.300ml of oxygen gas at 10 degree Celsius are heated to 10 degree Celsius. What is the new volume if pressure remains constant?

A body centered cubic lattice is made up of hollow shere of B. Sphere of solid A are present in hollow sphere of B. Radius of A is half of the radius of B. What is the ratio of total volume of sphere B unoccupied by A in unit cell and volume of unit cell?

Select the incorrect statementA. Boron tribromide is stronger lewis acid than boron trifluoride B. Borax has two tetrahedral and two triangular units C. B2H6.2NH3 considered as ionic product D.When diborane with excess of NH3 mixture is heated at high temperature Borazole is formed

Why is the reactivity of halogen atom in isopropyl chloride less reactive than in isopropyl bromide?

Why amine shows more electrophillic substitution than phenol

What is meant by the term functional group?

The stability of +1 oxidation state among Al,Ga,In and TI increases in the sequence :

The velocity associated with a proton moving in a potential difference of 1000 V is 4.37 × 105ms–1. If the hockey ball of mass 0.1 Kg is moving with this velocity, calculate the wavelength associated with this velocity.

Which one of the following sets of ions represents a collection of isoelectronic species?

The correct order of electron affinity among the following species: O, S, Se

One mole of proton each of frequency 2500Hz which have an approximately pf total energy__________?

A pure semiconductor has equal electron and hole concentration of 1016 m−3. Doping by indium increases nh to 4.5×1022 m−3.What is the value ofne in the doped semiconductor?

The compound (Z) is ?

The number of atoms present in 120 amu of Ca are

5.What is the difference between carbocation and cation.

36. What is meant by virial coefficient of real gas?

98.The following complex is stable or not Fe2(co)9 Fe3(Co)12 Co2(Co)8 Co4(Co)12 Ir(Co)12

Match the following: List IList IIi) Riboflavin p) Beri beriii) Thiamineq) Scurvyiii) Pyridoxiner) Cheilosisiv) Ascorbic acids) Convulsions

What happens when ammonium bromide reacts with ammonia

37.how does ethane and benzene represent law of multiple proportions?

SO2 reacts with NaOH forming