46295 + Interview Questions in Chemistry Page 53 InterviewSolution

2601.	There are two scenarios and in either case, we start with 5-oxohexanal. A reagent or sequence of reactions "A" helps convert the substrate into 6-hydroxyhexan-2-one. On the other hand, a reagent or sequence of reactions "B" converts the starting compound into 5-hydroxyhexanal. A and B are:
Answer» There are two scenarios and in either case, we start with 5-oxohexanal. A reagent or sequence of reactions "A" helps convert the substrate into 6-hydroxyhexan-2-one. On the other hand, a reagent or sequence of reactions "B" converts the starting compound into 5-hydroxyhexanal. A and B are:

Discussion

2602.	The pH of a solution that is 0.1M NaA and 0.1M HA (Ka=1×10−6) would be:
Answer» The $p H$ of a solution that is 0.1M NaA and 0.1M HA $(K a = 1 \times 10^{- 6})$ would be:

Discussion

2603.	Which of the following structure is the most stable?
Answer» Which of the following structure is the most stable?

Discussion

2604.	29. A mixture of N, and H2 is caused to react in aclosed container to form NH. The reaction ceasesbefore any of the reactant has been totallyconsumed. At this stage, 4 moles each of N2, H2and NH are present. Then the weight of N and Hpresent originally were respectively(1) 224 g and 16 g(3) 168 g and 16 g(2) 168 g and 20 g(4) 224 g and 20 g
Answer» 29. A mixture of N, and H2 is caused to react in aclosed container to form NH. The reaction ceasesbefore any of the reactant has been totallyconsumed. At this stage, 4 moles each of N2, H2and NH are present. Then the weight of N and Hpresent originally were respectively(1) 224 g and 16 g(3) 168 g and 16 g(2) 168 g and 20 g(4) 224 g and 20 g

Discussion

2605.	which of the following has longest C-O bond length ? (free C-O bond length in CO is 1.128 Ang) 1.)\lbrack Mn(CO)6\rbrack^{+ } 2)\lbrack Ni(CO)4\rbrack 3)\lbrack CO(CO)4\rbrack^- 4)\lbrack Fe(CO)4\rbrack^{2-
Answer» which of the following has longest C-O bond length ? (free C-O bond length in CO is 1.128 Ang) 1.)\lbrack Mn(CO)6\rbrack^{+ } 2)\lbrack Ni(CO)4\rbrack 3)\lbrack CO(CO)4\rbrack^- 4)\lbrack Fe(CO)4\rbrack^{2-

Discussion

2606.	which has more enthalpyu of fusion ,vapourosation,bond dissciation T,D,H??whats main diff berwen t
Answer» which has more enthalpyu of fusion ,vapourosation,bond dissciation T,D,H??whats main diff berwen t

Discussion

2607.	Iso butylene can be converted into tertiary butyl bromide by its reaction with 1. HBr2.HBr in presence of peroxides3.Br2
Answer» Iso butylene can be converted into tertiary butyl bromide by its reaction with 1. HBr 2.HBr in presence of peroxides 3.Br2

Discussion

2608.	what is thio alcohol and thio ether ?
Answer» what is thio alcohol and thio ether ?

Discussion

2609.	The normality of .3M H3PO3is
Answer» The normality of .3M H3PO3is

Discussion

2610.	37. When anion leaves the normal site and electron occupies interstitial site in the crystal lattice it is called what
Answer» 37. When anion leaves the normal site and electron occupies interstitial site in the crystal lattice it is called what

Discussion

2611.	How to find if one organic compound is acid sensitive or basic sensitive while comparing the clemmensen reduction and wolff kishner reduction?
Answer» How to find if one organic compound is acid sensitive or basic sensitive while comparing the clemmensen reduction and wolff kishner reduction?

Discussion

2612.	How to determine atomicity of green vitrol
Answer» How to determine atomicity of green vitrol

Discussion

2613.	An element crystallizes in a FCC lattice with cell edge of 400 pm. The density of the element is 7 g cm−3. How many atoms are present in 280 g of the element?
Answer» An element crystallizes in a FCC lattice with cell edge of 400 pm. The density of the element is $7 g c m^{- 3}$ . How many atoms are present in 280 g of the element?

Discussion

2614.	β- D - Galactose is represented as
Answer» β- D - Galactose is represented as

Discussion

2615.	What are hybridisation states of each carbon atom in the following compounds? CH2=C=O CH3CH=CH2 (CH3)2CO CH2=CHCN, C6H6
Answer» What are hybridisation states of each carbon atom in the following compounds? $C H_{2} = C = O$ $C H_{3} C H = C H_{2}$ $(C H_{3})_{2} C O$ $C H_{2} = C H C N$ , $C_{6} H_{6}$

2615.

What are hybridisation states of each carbon atom in the following compounds? CH2=C=O CH3CH=CH2 (CH3)2CO CH2=CHCN, C6H6

Answer»

What are hybridisation states of each carbon atom in the following compounds?

$C H_{2} = C = O$

$C H_{3} C H = C H_{2}$

$(C H_{3})_{2} C O$

$C H_{2} = C H C N$ ,

$C_{6} H_{6}$

Discussion

2616.	In a close packing of atoms A of radius _{ra ,}the radius of atom Bthat can be fitted in the tetrahedral void is (1)0.{225}_{ra } (2)0.{115}_{ra} (3)0.{414}_{ra} (4)0.{732}_r
Answer» In a close packing of atoms A of radius _{ra ,}the radius of atom Bthat can be fitted in the tetrahedral void is (1)0.{225}_{ra } (2)0.{115}_{ra} (3)0.{414}_{ra} (4)0.{732}_r

Discussion

2617.	16.Which is the oxidation number of potassium paroxide??
Answer» 16.Which is the oxidation number of potassium paroxide??

Discussion

2618.	What is catenation?
Answer» What is catenation?

Discussion

2619.	correct order of dipole moment of orthonitro phenol, ortho dichlorobenzene andxylene
Answer» correct order of dipole moment of orthonitro phenol, ortho dichlorobenzene andxylene

Discussion

2620.	The LUMO in CO is
Answer» The $L U M O$ in $C O$ is

Discussion

2621.	Which of the following will be most acidic?
Answer» Which of the following will be most acidic?

Discussion

2622.	What is the order of resistance in the following materials?
Answer» What is the order of resistance in the following materials?

Discussion

2623.	50 mL of hydrogen takes 20 minutes to diffuse out of a vessel. How long ( in minutes) will 40 mL of oxygen take to diffuse out from the same vessel under the same conditions?
Answer» $50 mL$ of hydrogen takes $20 m i n u t e s$ to diffuse out of a vessel. How long ( in minutes) will $40 mL$ of oxygen take to diffuse out from the same vessel under the same conditions?

Discussion

2624.	Sample of air is saturated with the benzene( vapour pressure is equal 200 mmhgat 298 2Kelvin )298 Kelvin 750 mm HG pressure if it is isothermal comprrssed to one third of its initial volume the find final pressure of the system A 2250 torr B 2150 torr C 2050 torr D 1950 torr
Answer» Sample of air is saturated with the benzene( vapour pressure is equal 200 mmhgat 298 2Kelvin )298 Kelvin 750 mm HG pressure if it is isothermal comprrssed to one third of its initial volume the find final pressure of the system A 2250 torr B 2150 torr C 2050 torr D 1950 torr

Discussion

2625.	44. 1.0 molal aqueous solution of an electrolyte X_3Y_2 is 25% ionized.The boiling point of the solution is(K_b for H_2O=0.52)
Answer» 44. 1.0 molal aqueous solution of an electrolyte X_3Y_2 is 25% ionized.The boiling point of the solution is(K_b for H_2O=0.52)

Discussion

2626.	Identify structure of reactant (X) :
Answer» Identify structure of reactant (X) :

Discussion

2627.	In Wurtz reaction, the reagent used is
Answer» In Wurtz reaction, the reagent used is

Discussion

2628.	Calculate the cell potential (Ecell) of the following cell at 298K.Ag(s)\|AgNO3(0.01 M)\|\|AgNO3(1.0 M)\|Ag(s)
Answer» Calculate the cell potential ( $E_{c e l l}$ ) of the following cell at $298 K$ . $A g (s) \| A g N O_{3} (0.01 M) \| \| A g N O_{3} (1.0 M) \| A g (s)$

Discussion

2629.	For PCl5(g)⇌PCl3(g)+Cl2(g), write the expression of Kc.
Answer» For $P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g),$ write the expression of $K_{c} .$

Discussion

2630.	In what respect do prontosil and salvarsan resemble. Is there any resemblance between azo dye and prontosil? Explain.
Answer» In what respect do prontosil and salvarsan resemble. Is there any resemblance between azo dye and prontosil? Explain.

Discussion

2631.	The freezing point (in ∘C) of solution containing 0.1 g of K3[Fe(CN)]6 (mol.wt.392) in 100 g of water(Kf=1.86K kg mol−1) is
Answer» The freezing point $(i n^{\circ} C)$ of solution containing 0.1 g of $K_{3} [F e (C N)]_{6}$ (mol.wt.392) in 100 g of water( $K_{f}$ =1.86K kg $m o l^{- 1}$ ) is

Discussion

2632.	Pb+PbO2+2H2SO4=2PbSo4+2H2Owhat will be the equivalent weight of H2S04 with its explaination?
Answer» Pb+PbO2+2H2SO4=2PbSo4+2H2O what will be the equivalent weight of H2S04 with its explaination?

Discussion

2633.	How many of the following molecules/ion are planar ? CO2−3, NO−3, XeO4, XeF4, SF4, I−3, COCl2, SO3, I2Cl6(solid)
Answer» How many of the following molecules/ion are planar ? $C O_{3}^{2 -}, N O_{3}^{-}, X e O_{4}, X e F_{4}, S F_{4}, I_{3}^{-}, C O C l_{2}, S O_{3}, I_{2} C l_{6} (solid)$

Discussion

2634.	Number of correct statement among the following is (A) The electron affinity of Si is greater than that of C (B) BeO is amphoteric while B2O3 is acidic. (C) The ionization energy of Ga is less than that of Al. (D) The ionization energy of elements of Cu - group is less than that of the respective elements of Zn - group.
Answer» Number of correct statement among the following is (A) The electron affinity of $S i$ is greater than that of $C$ (B) $B e O$ is amphoteric while $B_{2} O_{3}$ is acidic. (C) The ionization energy of $G a$ is less than that of $A l$ . (D) The ionization energy of elements of $C u$ - group is less than that of the respective elements of $Z n$ - group.

Discussion

2635.	Correct relation between current gain of common base (α) and common collector (β) configuration of a transistor is
Answer» Correct relation between current gain of common base ( $α$ ) and common collector $(β)$ configuration of a transistor is

Discussion

2636.	The vapour pressure of two liquids P and Q are 80 and 60 torr respectively the total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be
Answer» The vapour pressure of two liquids P and Q are 80 and 60 torr respectively the total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be

Discussion

2637.	Calculatethe potential of hydrogen electrode in contact with a solution whosepH is 10.
Answer» Calculate the potential of hydrogen electrode in contact with a solution whose pH is 10.

Discussion

2638.	24.Two samples of CH3COOH each of 10 g were taken separately in two vessels containing water of 6 litre and 12 litre respectively at 27 degree Celsius the degree of dissociation of CH3COOH will be
Answer» 24.Two samples of CH3COOH each of 10 g were taken separately in two vessels containing water of 6 litre and 12 litre respectively at 27 degree Celsius the degree of dissociation of CH3COOH will be

Discussion

2639.	Assertion (A) o-nitrophenol is less soluble in water than the m- and p-isomers. Reason (R) m and p-nitrophenols exist as associated molecules. (a) Assertion and reason both are correct and reason is correct explanation of assertion. (b) Assertion and reason both are wrong statements. (c) Assertion is correct statement but reason is wrong statement. (d) Assertion is wrong statement but reason is correct statement. (e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
Answer» Assertion (A) o-nitrophenol is less soluble in water than the m- and p-isomers. Reason (R) m and p-nitrophenols exist as associated molecules. (a) Assertion and reason both are correct and reason is correct explanation of assertion. (b) Assertion and reason both are wrong statements. (c) Assertion is correct statement but reason is wrong statement. (d) Assertion is wrong statement but reason is correct statement. (e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Discussion

2640.	For H3PO3 and H3PO4 the correct choice is
Answer» For $H_{3} P O_{3}$ and $H_{3} P O_{4}$ the correct choice is

Discussion

2641.	39. Which is/are correct A) oxidizing property : F2> Cl2> Br2>I2 B) reducing property : F- >Cl- > Br- >I-
Answer» 39. Which is/are correct A) oxidizing property : F2> Cl2> Br2>I2 B) reducing property : F- >Cl- > Br- >I-

Discussion

2642.	A square planar complex is formed by hybridization of which atomic orbitals
Answer» A square planar complex is formed by hybridization of which atomic orbitals

Discussion

2643.	The compound that does not give effervescence on reaction with NaHCO3 is:
Answer» The compound that does not give effervescence on reaction with $N a H C O_{3}$ is:

Discussion

2644.	8. During electrolysis of water,what are the charges carried by anode and cathode?
Answer» 8. During electrolysis of water,what are the charges carried by anode and cathode?

Discussion

2645.	NaOH is a strong base because
Answer» $N a O H$ is a strong base because

Discussion

2646.	Which of the following compound (s) show(s) optical isomerism?en- Ethylenediaminebn- Butylenediaminegly- Gylcinate
Answer» Which of the following compound (s) show(s) optical isomerism? $en- Ethylenediamine bn- Butylenediamine gly- Gylcinate$

Discussion

2647.	Pick out the diamagnetic species
Answer» Pick out the diamagnetic species

Discussion

2648.	32. Does m-methoxybenzyl carbocation show - m effect?
Answer» 32. Does m-methoxybenzyl carbocation show - m effect?

Discussion

2649.	The hybridization of central atom in N−3 and ICl−4 are respectively,
Answer» The hybridization of central atom in $N_{3}^{-}$ and $I C l_{4}^{-}$ are respectively,

Discussion

2650.	Given reaction is an example of nucleophilic aromatic substitution. Which of the following halide (−X) is most readily replaced.
Answer» Given reaction is an example of nucleophilic aromatic substitution. Which of the following halide (−X) is most readily replaced.

Discussion

Explore topic-wise InterviewSolutions in .

There are two scenarios and in either case, we start with 5-oxohexanal. A reagent or sequence of reactions "A" helps convert the substrate into 6-hydroxyhexan-2-one. On the other hand, a reagent or sequence of reactions "B" converts the starting compound into 5-hydroxyhexanal. A and B are:

The pH of a solution that is 0.1M NaA and 0.1M HA (Ka=1×10−6) would be:

Which of the following structure is the most stable?

which of the following has longest C-O bond length ? (free C-O bond length in CO is 1.128 Ang) 1.)\lbrack Mn(CO)6\rbrack^{+ } 2)\lbrack Ni(CO)4\rbrack 3)\lbrack CO(CO)4\rbrack^- 4)\lbrack Fe(CO)4\rbrack^{2-

which has more enthalpyu of fusion ,vapourosation,bond dissciation T,D,H??whats main diff berwen t

Iso butylene can be converted into tertiary butyl bromide by its reaction with 1. HBr2.HBr in presence of peroxides3.Br2

what is thio alcohol and thio ether ?

The normality of .3M H3PO3is

37. When anion leaves the normal site and electron occupies interstitial site in the crystal lattice it is called what

How to find if one organic compound is acid sensitive or basic sensitive while comparing the clemmensen reduction and wolff kishner reduction?

How to determine atomicity of green vitrol

An element crystallizes in a FCC lattice with cell edge of 400 pm. The density of the element is 7 g cm−3. How many atoms are present in 280 g of the element?

β- D - Galactose is represented as

What are hybridisation states of each carbon atom in the following compounds? CH2=C=O CH3CH=CH2 (CH3)2CO CH2=CHCN, C6H6

In a close packing of atoms A of radius _{ra ,}the radius of atom Bthat can be fitted in the tetrahedral void is (1)0.{225}_{ra } (2)0.{115}_{ra} (3)0.{414}_{ra} (4)0.{732}_r

16.Which is the oxidation number of potassium paroxide??

What is catenation?

correct order of dipole moment of orthonitro phenol, ortho dichlorobenzene andxylene

The LUMO in CO is

Which of the following will be most acidic?

What is the order of resistance in the following materials?

50 mL of hydrogen takes 20 minutes to diffuse out of a vessel. How long ( in minutes) will 40 mL of oxygen take to diffuse out from the same vessel under the same conditions?

Sample of air is saturated with the benzene( vapour pressure is equal 200 mmhgat 298 2Kelvin )298 Kelvin 750 mm HG pressure if it is isothermal comprrssed to one third of its initial volume the find final pressure of the system A 2250 torr B 2150 torr C 2050 torr D 1950 torr

44. 1.0 molal aqueous solution of an electrolyte X_3Y_2 is 25% ionized.The boiling point of the solution is(K_b for H_2O=0.52)

Identify structure of reactant (X) :

In Wurtz reaction, the reagent used is

Calculate the cell potential (Ecell) of the following cell at 298K.Ag(s)|AgNO3(0.01 M)||AgNO3(1.0 M)|Ag(s)

For PCl5(g)⇌PCl3(g)+Cl2(g), write the expression of Kc.

In what respect do prontosil and salvarsan resemble. Is there any resemblance between azo dye and prontosil? Explain.

The freezing point (in ∘C) of solution containing 0.1 g of K3[Fe(CN)]6 (mol.wt.392) in 100 g of water(Kf=1.86K kg mol−1) is

Pb+PbO2+2H2SO4=2PbSo4+2H2Owhat will be the equivalent weight of H2S04 with its explaination?

How many of the following molecules/ion are planar ? CO2−3, NO−3, XeO4, XeF4, SF4, I−3, COCl2, SO3, I2Cl6(solid)

Correct relation between current gain of common base (α) and common collector (β) configuration of a transistor is

The vapour pressure of two liquids P and Q are 80 and 60 torr respectively the total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be

Calculatethe potential of hydrogen electrode in contact with a solution whosepH is 10.

24.Two samples of CH3COOH each of 10 g were taken separately in two vessels containing water of 6 litre and 12 litre respectively at 27 degree Celsius the degree of dissociation of CH3COOH will be

For H3PO3 and H3PO4 the correct choice is

39. Which is/are correct A) oxidizing property : F2> Cl2> Br2>I2 B) reducing property : F- >Cl- > Br- >I-

A square planar complex is formed by hybridization of which atomic orbitals

The compound that does not give effervescence on reaction with NaHCO3 is:

8. During electrolysis of water,what are the charges carried by anode and cathode?

NaOH is a strong base because

Which of the following compound (s) show(s) optical isomerism?en- Ethylenediaminebn- Butylenediaminegly- Gylcinate

Pick out the diamagnetic species

32. Does m-methoxybenzyl carbocation show - m effect?

The hybridization of central atom in N−3 and ICl−4 are respectively,

Given reaction is an example of nucleophilic aromatic substitution. Which of the following halide (−X) is most readily replaced.