46295 + Interview Questions in Chemistry

1.	The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T= surface tension of the solution)
Answer» The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T= surface tension of the solution)

1.

The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T= surface tension of the solution)

Answer»

The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T= surface tension of the solution)

Discussion

2.	In the following reaction, the alkene affords the compound 'B'CH3CH=CHCH3+O3Zn−−→H2OBThe compound B is:
Answer» In the following reaction, the alkene affords the compound 'B' $C H_{3} C H = C H C H_{3} + O_{3} Z n - - \to H_{2} O B$ The compound B is:

Discussion

3.	The radius of the second Bohr orbit, in terms of the Bohr radius, a0, in Li2+ is:
Answer» The radius of the second Bohr orbit, in terms of the Bohr radius, $a_{0}, in L i^{2 +}$ is:

Discussion

4.	Consider the following reactions:I.Me3C−Cl⊖OH−−→Me3C−OHII.F3C−CH\|Me−Cl⊖OH−−→F3C−CH\|Me−OHIII.Me3C−Cl90%D2O+10%ether−−−−−−−−−−−−→Me3C−ODIV.Me3C−Cl90%H2O+10%ether−−−−−−−−−−−−→Me3C−OHWhich of the following statements are correct?
Answer» Consider the following reactions: $I . M e_{3} C - C l ⊖ O H - - \to M e_{3} C - O H I I . F_{3} C - C H \| M e - C l ⊖ O H - - \to F_{3} C - C H \| M e - O H I I I . M e_{3} C - C l 90 % D_{2} O + 10 % e t h e r - ----------- \to M e_{3} C - O D I V . M e_{3} C - C l 90 % H_{2} O + 10 % e t h e r - ----------- \to M e_{3} C - O H$ Which of the following statements are correct?

4.

Consider the following reactions:I.Me3C−Cl⊖OH−−→Me3C−OHII.F3C−CH|Me−Cl⊖OH−−→F3C−CH|Me−OHIII.Me3C−Cl90%D2O+10%ether−−−−−−−−−−−−→Me3C−ODIV.Me3C−Cl90%H2O+10%ether−−−−−−−−−−−−→Me3C−OHWhich of the following statements are correct?

Answer»

Consider the following reactions:

$I . M e_{3} C - C l ⊖ O H - - \to M e_{3} C - O H I I . F_{3} C - C H | M e - C l ⊖ O H - - \to F_{3} C - C H | M e - O H I I I . M e_{3} C - C l 90 % D_{2} O + 10 % e t h e r - ----------- \to M e_{3} C - O D I V . M e_{3} C - C l 90 % H_{2} O + 10 % e t h e r - ----------- \to M e_{3} C - O H$

Which of the following statements are correct?

Discussion

5.	On heating which of the following releases CO2 most easily?
Answer» On heating which of the following releases $C O_{2}$ most easily?

Discussion

6.	Why Na2CrO4 is acidified by H2SO4 not by HCl?
Answer» Why Na2CrO4 is acidified by H2SO4 not by HCl?

Discussion

7.	Select the reaction(s), in which energy need to be provided
Answer» Select the reaction(s), in which energy need to be provided

Discussion

8.	Which of the following is/are true in case of molecules?
Answer» Which of the following is/are true in case of molecules?

Discussion

9.	Which carbocation is more stable allylic or tertiary ?
Answer» Which carbocation is more stable allylic or tertiary ?

Discussion

10.	which reacts readily with lucas reagent? phenol or 2 methyl propan 2 o
Answer» which reacts readily with lucas reagent? phenol or 2 methyl propan 2 o

Discussion

11.	What is the oxidation no. nitrogen in benzaldehyde.
Answer» What is the oxidation no. nitrogen in benzaldehyde.

Discussion

12.	10. Why pcl5 in solid state exist in ions?
Answer» 10. Why pcl5 in solid state exist in ions?

Discussion

13.	The coordination number of a metal crystallizing in a hexagonal close packed structure is[NCERT 1978; IIT 1999]
Answer» The coordination number of a metal crystallizing in a hexagonal close packed structure is [NCERT 1978; IIT 1999]

Discussion

14.	How much magnesium sulphide can be obtained from 2.00 g of magnesium and 2.00 g ofSulphur by the reaction, Mg + S→ MgS? Which is the limiting agent? Calculate the amountof one of the reactants which remains unreacted. \lbrack Mg 24, S 32\rbrack
Answer» How much magnesium sulphide can be obtained from 2.00 g of magnesium and 2.00 g ofSulphur by the reaction, Mg + S→ MgS? Which is the limiting agent? Calculate the amountof one of the reactants which remains unreacted. \lbrack Mg 24, S 32\rbrack

Discussion

15.	X and Y are two compounds of elements A and Cl. Molar mass and mass % of Cl are given in the table below.CompoundMolar mass% of ClX13777.5Y20885.1Thus, X and Y are:
Answer» X and Y are two compounds of elements A and Cl. Molar mass and mass % of Cl are given in the table below. $\begin{matrix} Compound & Molar mass & % of Cl X & 137 & 77.5 Y & 208 & 85.1 \end{matrix}$ Thus, X and Y are:

Discussion

16.	Which is the strongest nucleophilic site in the following species?
Answer» Which is the strongest nucleophilic site in the following species?

Discussion

17.	'प्रकृति सजीव नारी बन गई'- इस कथन के संदर्भ में लेखक की प्रकृति, नारी और सौंदर्य संबंधी मान्यताएँ सपष्ट कीजिए।
Answer» 'प्रकृति सजीव नारी बन गई'- इस कथन के संदर्भ में लेखक की प्रकृति, नारी और सौंदर्य संबंधी मान्यताएँ सपष्ट कीजिए।

Discussion

18.	23. What is steriochemicali inactive orbital
Answer» 23. What is steriochemicali inactive orbital

Discussion

19.	A gas has molar heat capacity C = 4.5 R in the process PT = constant. The number of degrees of freedom of molecules in the gas is :-(1)4 (2)3 (3)6 (4)5
Answer» A gas has molar heat capacity C = 4.5 R in the process PT = constant. The number of degrees of freedom of molecules in the gas is :- (1)4 (2)3 (3)6 (4)5

Discussion

20.	how to convert teemperture from degree sellsius to kelvin
Answer» how to convert teemperture from degree sellsius to kelvin

Discussion

21.	CCl3−C≡C−HD2/Pd−HaSO4−−−−−−−−−→AHCl−−→B Compound A and B respectively are:
Answer» $C C l_{3} - C \equiv C - H D_{2} / P d - H a S O_{4} - -------- \to A H C l - - \to B$ Compound A and B respectively are:

Discussion

22.	Which of the following compound(s) will not give a positive carbylamine test?
Answer» Which of the following compound(s) will not give a positive carbylamine test?

Discussion

23.	What is the solubility of Al(OH)3, (Ksp=1×10−33) in a buffer solution having pH=4?
Answer» What is the solubility of $A l (O H)_{3}$ , $(K_{s p} = 1 \times 10^{- 33})$ in a buffer solution having pH=4?

Discussion

24.	IUPAC name of CH3−CH\|CH3−CH2−CH\|CN−CH3 is
Answer» IUPAC name of $C H_{3} - C H \| C H_{3} - C H_{2} - C H \| C N - C H_{3}$ is

Discussion

25.	Gauss law
Answer» Gauss law

Discussion

26.	Occlusion of hydrogen on palladium in an example for ___type of solution.
Answer» Occlusion of hydrogen on palladium in an example for ___type of solution.

Discussion

27.	Calculate the energy of the photon emitted during the transition from energy levels n = 4 to n = 2 in a hydrogen atom.
Answer» Calculate the energy of the photon emitted during the transition from energy levels n = 4 to n = 2 in a hydrogen atom.

Discussion

28.	ntIf Zinc is placed above Iron in the reactivity series of metals. Then, why doesn't the zinc coating on an iron object react and corrode faster than an iron object without any zinc coating ?n
Answer» ntIf Zinc is placed above Iron in the reactivity series of metals. Then, why doesn't the zinc coating on an iron object react and corrode faster than an iron object without any zinc coating ?n

Discussion

29.	Silver nitrate is 85% by mass. To prepare 125ml of 0.05molar silver nitrate solution , silver nitrate sample required is?
Answer» Silver nitrate is 85% by mass. To prepare 125ml of 0.05molar silver nitrate solution , silver nitrate sample required is?

Discussion

30.	76 Convert The following- a) Benzene to 4-nitroaniline
Answer» 76 Convert The following- a) Benzene to 4-nitroaniline

Discussion

31.	In which of the following molecules carbon atom marked with asterisk (*) is asymmetric? (a) (i), (ii), (iii) and (iv) (b) (i) ,(ii) and (iii) (c) (ii), (iii) and (iv) (d) (i), (iii) and (iv)
Answer» In which of the following molecules carbon atom marked with asterisk (*) is asymmetric? (a) (i), (ii), (iii) and (iv) (b) (i) ,(ii) and (iii) (c) (ii), (iii) and (iv) (d) (i), (iii) and (iv)

31.

In which of the following molecules carbon atom marked with asterisk (*) is asymmetric? (a) (i), (ii), (iii) and (iv) (b) (i) ,(ii) and (iii) (c) (ii), (iii) and (iv) (d) (i), (iii) and (iv)

Answer»

In which of the following molecules carbon atom marked with asterisk (*) is asymmetric?

(a) (i), (ii), (iii) and (iv) (b) (i) ,(ii) and (iii)

(c) (ii), (iii) and (iv) (d) (i), (iii) and (iv)

Discussion

32.	A photon of 400 nm is absorbed by a gas molecule and then the molecule re-emits two photons. One re-emitted photon has wavelength 500 nm. Assuming that there is no change in the energy of molecules, the wavelength of second re-emitted photon is:
Answer» A photon of $400 nm$ is absorbed by a gas molecule and then the molecule re-emits two photons. One re-emitted photon has wavelength $500 nm$ . Assuming that there is no change in the energy of molecules, the wavelength of second re-emitted photon is:

Discussion

33.	In the electrolysis of an aqueous solution of sodium hydroxide (brine) , sodium hydroxide is formed near the cathode. Why ? Why not near anode? Why not somewhere else?
Answer» In the electrolysis of an aqueous solution of sodium hydroxide (brine) , sodium hydroxide is formed near the cathode. Why ? Why not near anode? Why not somewhere else?

Discussion

34.	How will you distinguish between the following pairs of terms : (i) Tetrahedral and octahedral voids (ii) Crystal lattice and unit cell
Answer» How will you distinguish between the following pairs of terms : (i) Tetrahedral and octahedral voids (ii) Crystal lattice and unit cell

Discussion

35.	Continuing the inheritance story from the where we left – now the ore is concentrated. What would you do next with the now concentrated and dried ore?
Answer» Continuing the inheritance story from the where we left – now the ore is concentrated. What would you do next with the now concentrated and dried ore?

Discussion

36.	What is meant by representation of a solution graphically algebrically and geometrically ?
Answer» What is meant by representation of a solution graphically algebrically and geometrically ?

Discussion

37.	The EMF of the cell M\|Mn+ (0.02 M)\|\|H+ (1 M)\|H2 (g)(1 atm),Pt at 25∘C is 0.81 V. Calculate the valency of the metal if the standard oxidation potential of the metal is 0.76 V.(Given, log4=0.6)
Answer» The EMF of the cell $M \| M^{n^{+}} (0.02 M) \| \| H^{+} (1 M) \| H_{2} (g) (1 atm), P t$ at $25^{\circ} C$ is $0.81 V$ . Calculate the valency of the metal if the standard oxidation potential of the metal is $0.76 V$ . (Given, $log 4 = 0.6$ )

Discussion

38.	Which compound cannot exhibit tautomerism?
Answer» Which compound cannot exhibit tautomerism?

Discussion

39.	Fe(CN6)-6 ( -6 in power) Will this compound present in coordination compounds??
Answer» Fe(CN6)-6 ( -6 in power) Will this compound present in coordination compounds??

Discussion

40.	Which of the alkaline earth metal halides given below is essentially covalent in nature ?
Answer» Which of the alkaline earth metal halides given below is essentially covalent in nature ?

Discussion

41.	How many of the following addition reactions are syn addition reaction?
Answer» How many of the following addition reactions are $s y n$ addition reaction?

Discussion

42.	One of the by-products formed during the recovery of NH3 from solvay process is
Answer» One of the by-products formed during the recovery of $N H_{3}$ from solvay process is

Discussion

43.	ntdefine stefan's law and stefan-boltzmann law ?n
Answer» ntdefine stefan's law and stefan-boltzmann law ?n

Discussion

44.	A(g)→B(g)For the above reaction involving gaseous reactants and gaseous products, the concentration is expressed in terms of pressure. Then the unit of rate of reaction will be:
Answer» $A (g) \to B (g)$ For the above reaction involving gaseous reactants and gaseous products, the concentration is expressed in terms of pressure. Then the unit of rate of reaction will be:

Discussion

45.	The law of equivalents works only for a reaction going to completion so, what happens to the reaction that is not going to completion and how are they equilibriated?
Answer» The law of equivalents works only for a reaction going to completion so, what happens to the reaction that is not going to completion and how are they equilibriated?

Discussion

46.	find total number of geometrical isomers and total number of enantiomers of \lbrack Mabc_4\rbrack where M is central metal atom and a,b,c are ligands.
Answer» find total number of geometrical isomers and total number of enantiomers of \lbrack Mabc_4\rbrack where M is central metal atom and a,b,c are ligands.

Discussion

47.	a vertical cylindrical †an k 80 cm long has its top end closed by a thin & very light frictionless piston having the same diametre as that of the cylinder . the air is filled is at normal pressure. mercury is slowly poured over the tpo of the piston. how far will the piston descend before mercury spills over the top of the cylinder?
Answer» a vertical cylindrical †an k 80 cm long has its top end closed by a thin & very light frictionless piston having the same diametre as that of the cylinder . the air is filled is at normal pressure. mercury is slowly poured over the tpo of the piston. how far will the piston descend before mercury spills over the top of the cylinder?

Discussion

48.	explain why ha\log ens posses highest electronegativit
Answer» explain why ha\log ens posses highest electronegativit

Discussion

49.	A reaction 2A+BK−→C+D is first order w.r.t. and second order w.r.t. . Initial conc. (t=0) of is C0 while is 2C0. If at as 300 minutes the conc. of C is C04 then rate expression at t = 300 minutes is
Answer» A reaction $2 A + B K - \to C + D$ is first order w.r.t. and second order w.r.t. . Initial conc. (t=0) of is $C_{0}$ while is $2 C_{0}$ . If at as 300 minutes the conc. of C is $\frac{C_{0}}{4}$ then rate expression at t = 300 minutes is

Discussion

50.	Lassaigne's test for the detection of nitrogen will fail in the case of:
Answer» Lassaigne's test for the detection of nitrogen will fail in the case of:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T= surface tension of the solution)

In the following reaction, the alkene affords the compound 'B'CH3CH=CHCH3+O3Zn−−→H2OBThe compound B is:

The radius of the second Bohr orbit, in terms of the Bohr radius, a0, in Li2+ is:

On heating which of the following releases CO2 most easily?

Why Na2CrO4 is acidified by H2SO4 not by HCl?

Select the reaction(s), in which energy need to be provided

Which of the following is/are true in case of molecules?

Which carbocation is more stable allylic or tertiary ?

which reacts readily with lucas reagent? phenol or 2 methyl propan 2 o

What is the oxidation no. nitrogen in benzaldehyde.

10. Why pcl5 in solid state exist in ions?

The coordination number of a metal crystallizing in a hexagonal close packed structure is[NCERT 1978; IIT 1999]

How much magnesium sulphide can be obtained from 2.00 g of magnesium and 2.00 g ofSulphur by the reaction, Mg + S→ MgS? Which is the limiting agent? Calculate the amountof one of the reactants which remains unreacted. \lbrack Mg 24, S 32\rbrack

X and Y are two compounds of elements A and Cl. Molar mass and mass % of Cl are given in the table below.CompoundMolar mass% of ClX13777.5Y20885.1Thus, X and Y are:

Which is the strongest nucleophilic site in the following species?

'प्रकृति सजीव नारी बन गई'- इस कथन के संदर्भ में लेखक की प्रकृति, नारी और सौंदर्य संबंधी मान्यताएँ सपष्ट कीजिए।

23. What is steriochemicali inactive orbital

A gas has molar heat capacity C = 4.5 R in the process PT = constant. The number of degrees of freedom of molecules in the gas is :-(1)4 (2)3 (3)6 (4)5

how to convert teemperture from degree sellsius to kelvin

CCl3−C≡C−HD2/Pd−HaSO4−−−−−−−−−→AHCl−−→B Compound A and B respectively are:

Which of the following compound(s) will not give a positive carbylamine test?

What is the solubility of Al(OH)3, (Ksp=1×10−33) in a buffer solution having pH=4?

IUPAC name of CH3−CH|CH3−CH2−CH|CN−CH3 is

Gauss law

Occlusion of hydrogen on palladium in an example for ___type of solution.

Calculate the energy of the photon emitted during the transition from energy levels n = 4 to n = 2 in a hydrogen atom.

ntIf Zinc is placed above Iron in the reactivity series of metals. Then, why doesn't the zinc coating on an iron object react and corrode faster than an iron object without any zinc coating ?n

Silver nitrate is 85% by mass. To prepare 125ml of 0.05molar silver nitrate solution , silver nitrate sample required is?

76 Convert The following- a) Benzene to 4-nitroaniline

In which of the following molecules carbon atom marked with asterisk (*) is asymmetric? (a) (i), (ii), (iii) and (iv) (b) (i) ,(ii) and (iii) (c) (ii), (iii) and (iv) (d) (i), (iii) and (iv)

A photon of 400 nm is absorbed by a gas molecule and then the molecule re-emits two photons. One re-emitted photon has wavelength 500 nm. Assuming that there is no change in the energy of molecules, the wavelength of second re-emitted photon is:

In the electrolysis of an aqueous solution of sodium hydroxide (brine) , sodium hydroxide is formed near the cathode. Why ? Why not near anode? Why not somewhere else?

How will you distinguish between the following pairs of terms : (i) Tetrahedral and octahedral voids (ii) Crystal lattice and unit cell

Continuing the inheritance story from the where we left – now the ore is concentrated. What would you do next with the now concentrated and dried ore?

What is meant by representation of a solution graphically algebrically and geometrically ?

The EMF of the cell M|Mn+ (0.02 M)||H+ (1 M)|H2 (g)(1 atm),Pt at 25∘C is 0.81 V. Calculate the valency of the metal if the standard oxidation potential of the metal is 0.76 V.(Given, log4=0.6)

Which compound cannot exhibit tautomerism?

Fe(CN6)-6 ( -6 in power) Will this compound present in coordination compounds??

Which of the alkaline earth metal halides given below is essentially covalent in nature ?

How many of the following addition reactions are syn addition reaction?

One of the by-products formed during the recovery of NH3 from solvay process is

ntdefine stefan's law and stefan-boltzmann law ?n

A(g)→B(g)For the above reaction involving gaseous reactants and gaseous products, the concentration is expressed in terms of pressure. Then the unit of rate of reaction will be:

The law of equivalents works only for a reaction going to completion so, what happens to the reaction that is not going to completion and how are they equilibriated?

find total number of geometrical isomers and total number of enantiomers of \lbrack Mabc_4\rbrack where M is central metal atom and a,b,c are ligands.

explain why ha\log ens posses highest electronegativit

A reaction 2A+BK−→C+D is first order w.r.t. and second order w.r.t. . Initial conc. (t=0) of is C0 while is 2C0. If at as 300 minutes the conc. of C is C04 then rate expression at t = 300 minutes is

Lassaigne's test for the detection of nitrogen will fail in the case of: