46295 + Interview Questions in Chemistry

1.	If the density of menthanol is 0.793kg/l,what is its volume needed for making 2.5L of its 0.25M solution
Answer» If the density of menthanol is 0.793kg/l,what is its volume needed for making 2.5L of its 0.25M solution

Discussion

2.	How many mL of 0.1 N HCl are required to react completely with 1 g mixture of Na2CO3 and NaHCO3 containing equimolar amounts of both?
Answer» How many mL of $0.1 N H C l$ are required to react completely with $1 g$ mixture of $N a_{2} C O_{3}$ and $N a H C O_{3}$ containing equimolar amounts of both?

Discussion

3.	van’t Hoff factor is denoted by letter
Answer» van’t Hoff factor is denoted by letter

Discussion

4.	Classify the following as amorphous or crystalline solids: Polyurethane,naphthalene, benzoic acid, teflon, potassium nitrate, cellophane,polyvinyl chloride, fibre glass, copper.
Answer» Classify the following as amorphous or crystalline solids: Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.

4.

Classify the following as amorphous or crystalline solids: Polyurethane,naphthalene, benzoic acid, teflon, potassium nitrate, cellophane,polyvinyl chloride, fibre glass, copper.

Answer»

Classify the following as amorphous or crystalline solids:

Polyurethane,
naphthalene, benzoic acid, teflon, potassium nitrate, cellophane,
polyvinyl chloride, fibre glass, copper.

Discussion

5.	35. Mechanism of the Tishchenko Reaction
Answer» 35. Mechanism of the Tishchenko Reaction

Discussion

6.	What is the formula of the compound formed during Brown ring test of nitrate radical ?
Answer» What is the formula of the compound formed during Brown ring test of nitrate radical ?

Discussion

7.	43. Caesium and chloride ion are in contact along the body diagonal in bcc lattice the edge length of unit cell is 350pm and caesium has a radius of 133pm the radius of chloride ion approximately.
Answer» 43. Caesium and chloride ion are in contact along the body diagonal in bcc lattice the edge length of unit cell is 350pm and caesium has a radius of 133pm the radius of chloride ion approximately.

Discussion

8.	A bulb emits light of wave length 396 nm. The bulb is rated as 100 watt and 10% of the energy is emitted as light. How many photons are emitted by bulb per second?
Answer» A bulb emits light of wave length 396 nm. The bulb is rated as 100 watt and 10% of the energy is emitted as light. How many photons are emitted by bulb per second?

Discussion

9.	45. which one is least basic? 1 nf3 2 ncl3 3 nh3 4 nbr3
Answer» 45. which one is least basic? 1 nf3 2 ncl3 3 nh3 4 nbr3

Discussion

10.	HA + OH-→ H2O +A_ + q1 kJThe enthalpy of ionisation of HA is(2) (41-2)(4)-(q1+ 2)(92 -q)
Answer» HA + OH-→ H2O +A_ + q1 kJThe enthalpy of ionisation of HA is(2) (41-2)(4)-(q1+ 2)(92 -q)

Discussion

11.	32. A polymeric substance contain 0.2 % of a metal of atomic weight 60. A molecule contain 1 atom of a metal the min. molecular weight of a polymer is ?
Answer» 32. A polymeric substance contain 0.2 % of a metal of atomic weight 60. A molecule contain 1 atom of a metal the min. molecular weight of a polymer is ?

Discussion

12.	Which of the following is the correct order of reactivity of dihydrogen with halides?
Answer» Which of the following is the correct order of reactivity of dihydrogen with halides?

Discussion

13.	Reaction of 2-butane with acidic KMnO4 gives
Answer» Reaction of 2-butane with acidic KMnO $_{4}$ gives

Discussion

14.	10. The rate for the reaction RCI + NaOHaq) ROH + NaCl is given by rate K,IRCI. The rate of reaction is (1) Doubled on doubling the concentration of NaOH (2) Halved on reducing the concentration of RCI to half (3) Decreased on increasing the temperature of the reaction (4) Unaffected by increasing the temperature of the reaction
Answer» 10. The rate for the reaction RCI + NaOHaq) ROH + NaCl is given by rate K,IRCI. The rate of reaction is (1) Doubled on doubling the concentration of NaOH (2) Halved on reducing the concentration of RCI to half (3) Decreased on increasing the temperature of the reaction (4) Unaffected by increasing the temperature of the reaction

Discussion

15.	What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results?(a) KI3 (b) H2S4O6 (c) Fe3O4 (d) CH3CH2OH (e) CH3COOH
Answer» What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results? (a) KI₃ (b) H₂S₄O₆ (c) Fe₃O₄ (d) CH₃CH₂OH (e) CH₃COOH

15.

What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results?(a) KI3 (b) H2S4O6 (c) Fe3O4 (d) CH3CH2OH (e) CH3COOH

Answer»

What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results?

(a) KI₃ (b) H₂S₄O₆ (c) Fe₃O₄ (d) CH₃CH₂OH (e) CH₃COOH

Discussion

16.	The chemical composition of 'slag' formed during the smelting process in the extraction of copper is:
Answer» The chemical composition of 'slag' formed during the smelting process in the extraction of copper is:

Discussion

17.	How many resonating structures are possible for the given molecule?
Answer» How many resonating structures are possible for the given molecule?

Discussion

18.	How to check for mutarotationa / reducing sugars?
Answer» How to check for mutarotationa / reducing sugars?

Discussion

19.	Consider the ΔG∘f and ΔH∘ values (in kJ.mol−1) for the following oxides. Which oxide can be most easily decomposed to form the metal and oxygen gas?
Answer» Consider the $Δ G_{f}^{\circ}$ and $Δ H^{\circ}$ values $({in kJ.mol}^{- 1})$ for the following oxides. Which oxide can be most easily decomposed to form the metal and oxygen gas?

Discussion

20.	What is meant by relative strength?
Answer» What is meant by relative strength?

Discussion

21.	The ratio of σ and π bonds in mesitylene is:
Answer» The ratio of $σ$ and $π$ bonds in mesitylene is:

Discussion

22.	Which of the following is non-benzenoid?
Answer» Which of the following is non-benzenoid?

Discussion

23.	In the Bragg's equation for diffraction of X-rays, n represents for[MP PMT 2000]
Answer» In the Bragg's equation for diffraction of X-rays, n represents for [MP PMT 2000]

23.

In the Bragg's equation for diffraction of X-rays, n represents for[MP PMT 2000]

Answer»

In the Bragg's equation for diffraction of X-rays, n represents for

[MP PMT 2000]

Discussion

24.	Determinethe amount of CaCl2 (i =2.47) dissolved in 2.5 litre of water such that its osmotic pressureis 0.75 atm at 27°C.
Answer» Determine the amount of CaCl2 (i = 2.47) dissolved in 2.5 litre of water such that its osmotic pressure is 0.75 atm at 27°C.

Discussion

25.	Write two uses of ClO2.
Answer» Write two uses of ClO₂.

Discussion

26.	Which of the following set of quantum number is not permitted?
Answer» Which of the following set of quantum number is not permitted?

Discussion

27.	The oxidation and reduction half reactions of the reaction 2Al(s) + 3Cu2+(aq) → 2Al3+(aq) + 3Cu(s) are
Answer» The oxidation and reduction half reactions of the reaction 2Al_(s) + 3Cu²⁺_(aq) → 2Al³⁺_(aq) + 3Cu_(s) are

Discussion

28.	A particle of mass m and charge q ia thrown at a speed u in a uniform electric field E.the distance it travelled before coming to rest will be
Answer» A particle of mass m and charge q ia thrown at a speed u in a uniform electric field E.the distance it travelled before coming to rest will be

Discussion

29.	The Van't Hoff factor will be highest for
Answer» The Van't Hoff factor will be highest for

Discussion

30.	Which of the following fluoro-compounds is most likely to behave as a Lewis base ?
Answer» Which of the following fluoro-compounds is most likely to behave as a Lewis base ?

Discussion

31.	Which of the following are covalent in nature?
Answer» Which of the following are covalent in nature?

Discussion

32.	Is Saponification reaction special kind of neutralisation reaction?
Answer» Is Saponification reaction special kind of neutralisation reaction?

Discussion

33.	Among the following halogens the one with highest bond energy is:
Answer» Among the following halogens the one with highest bond energy is:

Discussion

34.	Find the rotation at the intermediate support.
Answer» Find the rotation at the intermediate support.

Discussion

35.	17. In diamond, carbon atoms occupy FCC lattice points as well as alternate tetrahedral voids. If edge length of the unit cell is 356 pm, then the radius of carbon atom is
Answer» 17. In diamond, carbon atoms occupy FCC lattice points as well as alternate tetrahedral voids. If edge length of the unit cell is 356 pm, then the radius of carbon atom is

Discussion

36.	Increasing order of stability among the 3 main conformation of 2-fluoroethanol is:
Answer» Increasing order of stability among the 3 main conformation of 2-fluoroethanol is:

Discussion

37.	how many minimum carbons required for chain isomerism and position isomerism in alkanes alkenes and alkynes draw their structure also
Answer» how many minimum carbons required for chain isomerism and position isomerism in alkanes alkenes and alkynes draw their structure also

Discussion

38.	Calculate the minimum and the maximum number of electrons which may have magnetic quantum number, m=+1 and spin quantum number, s=−12 in chromium (Cr).
Answer» Calculate the minimum and the maximum number of electrons which may have magnetic quantum number, $m = + 1$ and spin quantum number, $s = - \frac{1}{2}$ in chromium $(C r)$ .

Discussion

39.	Which of the following arrangement of bond dissociation enthalpy of halogens is correct?
Answer» Which of the following arrangement of bond dissociation enthalpy of halogens is correct?

Discussion

40.	Whichof the following is true for diamond [AFMC 1997]
Answer» Which of the following is true for diamond [AFMC 1997]

40.

Whichof the following is true for diamond [AFMC 1997]

Answer»

Which
of the following is true for diamond

[AFMC 1997]

Discussion

41.	Equal moles of aniline and toluene are mixed, the vapour pressure of aniline and toluene in pure state are 800 and 600 mm Hg respectively. The mole fraction of toluene in vapour phase is
Answer» Equal moles of aniline and toluene are mixed, the vapour pressure of aniline and toluene in pure state are 800 and 600 mm Hg respectively. The mole fraction of toluene in vapour phase is

Discussion

42.	2The point of dissimilarity between (SO,), and(НРО)(HPO3)3 (cyclic trimer) is:-1(1) Both have six membered rinPoz(2) Both contain central atom inSamehybridisation.E51PE(3) Both contain planar ring.OPS0D(4) Both are isoelectrónic9
Answer» 2The point of dissimilarity between (SO,), and(НРО)(HPO3)3 (cyclic trimer) is:-1(1) Both have six membered rinPoz(2) Both contain central atom inSamehybridisation.E51PE(3) Both contain planar ring.OPS0D(4) Both are isoelectrónic9

Discussion

43.	What are degenrate orbitals
Answer» What are degenrate orbitals

Discussion

44.	The names of the following compounds are respectively:
Answer» The names of the following compounds are respectively:

44.

The names of the following compounds are respectively:

Answer»

The names of the following compounds are respectively:

Discussion

45.	By Wurtz reaction, a mixture of methyliodide and ethyliodide gives
Answer» By Wurtz reaction, a mixture of methyliodide and ethyliodide gives

Discussion

46.	what is tischenko reaction?
Answer» what is tischenko reaction?

Discussion

47.	why organic compound like ch3cl shows complete sterochemcical inversion during sn2 reactio
Answer» why organic compound like ch3cl shows complete sterochemcical inversion during sn2 reactio

Discussion

48.	A solution contains a mixture of Na2CO3 and NaOH. Using phenolphthalein as indicator 35 mL of mixture required 20 mL of 0.80 N HCl for the end point. With methyl orange, 35 mL of solution required 37.5 mL of the same HCl for the end point. What is the weight of Na2CO3 and NaOH respectively in the mixture?
Answer» A solution contains a mixture of $N a_{2} C O_{3}$ and $N a O H .$ Using phenolphthalein as indicator $35 m L$ of mixture required $20 m L$ of $0.80 N H C l$ for the end point. With methyl orange, $35 m L$ of solution required $37.5 m L$ of the same $H C l$ for the end point. What is the weight of $N a_{2} C O_{3}$ and $N a O H$ respectively in the mixture?

Discussion

49.	ntIn first law of thermodynamics under which conditions q=wn
Answer» ntIn first law of thermodynamics under which conditions q=wn

Discussion

50.	Pupils of eye are dilated with a very dilute solution of an alkaloid which is
Answer» Pupils of eye are dilated with a very dilute solution of an alkaloid which is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If the density of menthanol is 0.793kg/l,what is its volume needed for making 2.5L of its 0.25M solution

How many mL of 0.1 N HCl are required to react completely with 1 g mixture of Na2CO3 and NaHCO3 containing equimolar amounts of both?

van’t Hoff factor is denoted by letter

Classify the following as amorphous or crystalline solids: Polyurethane,naphthalene, benzoic acid, teflon, potassium nitrate, cellophane,polyvinyl chloride, fibre glass, copper.

35. Mechanism of the Tishchenko Reaction

What is the formula of the compound formed during Brown ring test of nitrate radical ?

43. Caesium and chloride ion are in contact along the body diagonal in bcc lattice the edge length of unit cell is 350pm and caesium has a radius of 133pm the radius of chloride ion approximately.

A bulb emits light of wave length 396 nm. The bulb is rated as 100 watt and 10% of the energy is emitted as light. How many photons are emitted by bulb per second?

45. which one is least basic? 1 nf3 2 ncl3 3 nh3 4 nbr3

HA + OH-→ H2O +A_ + q1 kJThe enthalpy of ionisation of HA is(2) (41-2)(4)-(q1+ 2)(92 -q)

32. A polymeric substance contain 0.2 % of a metal of atomic weight 60. A molecule contain 1 atom of a metal the min. molecular weight of a polymer is ?

Which of the following is the correct order of reactivity of dihydrogen with halides?

Reaction of 2-butane with acidic KMnO4 gives

What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results?(a) KI3 (b) H2S4O6 (c) Fe3O4 (d) CH3CH2OH (e) CH3COOH

The chemical composition of 'slag' formed during the smelting process in the extraction of copper is:

How many resonating structures are possible for the given molecule?

How to check for mutarotationa / reducing sugars?

Consider the ΔG∘f and ΔH∘ values (in kJ.mol−1) for the following oxides. Which oxide can be most easily decomposed to form the metal and oxygen gas?

What is meant by relative strength?

The ratio of σ and π bonds in mesitylene is:

Which of the following is non-benzenoid?

In the Bragg's equation for diffraction of X-rays, n represents for[MP PMT 2000]

Determinethe amount of CaCl2 (i =2.47) dissolved in 2.5 litre of water such that its osmotic pressureis 0.75 atm at 27°C.

Write two uses of ClO2.

Which of the following set of quantum number is not permitted?

The oxidation and reduction half reactions of the reaction 2Al(s) + 3Cu2+(aq) → 2Al3+(aq) + 3Cu(s) are

A particle of mass m and charge q ia thrown at a speed u in a uniform electric field E.the distance it travelled before coming to rest will be

The Van't Hoff factor will be highest for

Which of the following fluoro-compounds is most likely to behave as a Lewis base ?

Which of the following are covalent in nature?

Is Saponification reaction special kind of neutralisation reaction?

Among the following halogens the one with highest bond energy is:

Find the rotation at the intermediate support.

17. In diamond, carbon atoms occupy FCC lattice points as well as alternate tetrahedral voids. If edge length of the unit cell is 356 pm, then the radius of carbon atom is

Increasing order of stability among the 3 main conformation of 2-fluoroethanol is:

how many minimum carbons required for chain isomerism and position isomerism in alkanes alkenes and alkynes draw their structure also

Calculate the minimum and the maximum number of electrons which may have magnetic quantum number, m=+1 and spin quantum number, s=−12 in chromium (Cr).

Which of the following arrangement of bond dissociation enthalpy of halogens is correct?

Whichof the following is true for diamond [AFMC 1997]

Equal moles of aniline and toluene are mixed, the vapour pressure of aniline and toluene in pure state are 800 and 600 mm Hg respectively. The mole fraction of toluene in vapour phase is

2The point of dissimilarity between (SO,), and(НРО)(HPO3)3 (cyclic trimer) is:-1(1) Both have six membered rinPoz(2) Both contain central atom inSamehybridisation.E51PE(3) Both contain planar ring.OPS0D(4) Both are isoelectrónic9

What are degenrate orbitals

The names of the following compounds are respectively:

By Wurtz reaction, a mixture of methyliodide and ethyliodide gives

what is tischenko reaction?

why organic compound like ch3cl shows complete sterochemcical inversion during sn2 reactio

ntIn first law of thermodynamics under which conditions q=wn

Pupils of eye are dilated with a very dilute solution of an alkaloid which is