46295 + Interview Questions in Chemistry

1.	13. In fcc packing,tetrahedral voids divide a body diagonal in the ratio of A)1:1:1 B)1:2:2 C)1:2:1 D)1:2:3
Answer» 13. In fcc packing,tetrahedral voids divide a body diagonal in the ratio of A)1:1:1 B)1:2:2 C)1:2:1 D)1:2:3

Discussion

2.	32. How many enols(inclueding sterio isomers) exist for 3-Hexanone ?
Answer» 32. How many enols(inclueding sterio isomers) exist for 3-Hexanone ?

Discussion

3.	An electrichemical cell is set up as :Pt; H2 (1atm)/ HCl (0.1 M) // CH3COOH (0.1M)/ H2 (1atm) ;Pt. The e.m.f of this cell will not be zero, because(1) Acids used in two compartments are different(2) e.m.f depends on molarities of acids used(3) The temperature is constant(4) pH of 0.1 M HCl & 0.1 M CH3COOH is not same
Answer» An electrichemical cell is set up as : Pt; H2 (1atm)/ HCl (0.1 M) // CH3COOH (0.1M)/ H2 (1atm) ;Pt. The e.m.f of this cell will not be zero, because (1) Acids used in two compartments are different (2) e.m.f depends on molarities of acids used (3) The temperature is constant (4) pH of 0.1 M HCl & 0.1 M CH3COOH is not same

Discussion

4.	The coordination number and oxidation number of the central metal ion in the complex (NH4)2[Pt(Cl)6] is :
Answer» The coordination number and oxidation number of the central metal ion in the complex $(N H_{4})_{2} [P t (C l)_{6}]$ is :

Discussion

5.	(a) Write the dispersed phase and dispersion medium of milk. (b) Write one similarity between physisorption and chemisorption. (c) Write the chemical method by which Fe(OH)3 sol is prepared from FeCl3.
Answer» (a) Write the dispersed phase and dispersion medium of milk. (b) Write one similarity between physisorption and chemisorption. (c) Write the chemical method by which $F e (O H)_{3}$ sol is prepared from $F e C l_{3}$ .

Discussion

6.	Value of CFSE, in tetrahedral complex having 3d4 configuration of metal ion, surrounded by weak field ligands, will be
Answer» Value of CFSE, in tetrahedral complex having $3 d^{4}$ configuration of metal ion, surrounded by weak field ligands, will be

Discussion

7.	Substance A tetramerises in water to the extent of 80% . A solution of 2.5 g of A in 100g of water lowers the freezing point by 0.3 degrees . The molar mass of A is (Kf for water is = 1.86 K Kg / mol)(1) 122 (2) 31 (3) 244 (4) 62
Answer» Substance A tetramerises in water to the extent of 80% . A solution of 2.5 g of A in 100g of water lowers the freezing point by 0.3 degrees . The molar mass of A is (Kf for water is = 1.86 K Kg / mol) (1) 122 (2) 31 (3) 244 (4) 62

Discussion

8.	Which one of the following configuration represents a noble gas ?
Answer» Which one of the following configuration represents a noble gas ?

Discussion

9.	which one is correct 1. 3pen†an one and 3methyl 2 bu†an one are position isomers
Answer» which one is correct 1. 3pen†an one and 3methyl 2 bu†an one are position isomers

Discussion

10.	Methyl - ethyl ketone can be reduced to n-butane using the reaction:
Answer» Methyl - ethyl ketone can be reduced to n-butane using the reaction:

Discussion

11.	ntMolarity of liquid HCL, if density of solution is 1.17gm/cc?n
Answer» ntMolarity of liquid HCL, if density of solution is 1.17gm/cc?n

Discussion

12.	Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambinent condition is:
Answer» Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambinent condition is:

Discussion

13.	A mixture of gas at NTP for which =1.5 is suddenly compressed to 1/9th of its original volume. The final temperature of mixture is ?
Answer» A mixture of gas at NTP for which =1.5 is suddenly compressed to 1/9th of its original volume. The final temperature of mixture is ?

Discussion

14.	Why did the discovery of neutrons came very late?
Answer» Why did the discovery of neutrons came very late?

Discussion

15.	Classify each of the following as being either a p - type or a n - type semiconductor : (i) Ge doped with In (ii) Si doped with B
Answer» Classify each of the following as being either a p - type or a n - type semiconductor : (i) Ge doped with In (ii) Si doped with B

15.

Classify each of the following as being either a p - type or a n - type semiconductor : (i) Ge doped with In (ii) Si doped with B

Answer»

Classify each of the following as being either a p - type or a n - type semiconductor :

(i) Ge doped with In

(ii) Si doped with B

Discussion

16.	isoelectronic species have same outer electronic configuration, then thier shape and hybridization should also be same,yet some of isoelectronic species are not isostructural,why??
Answer» isoelectronic species have same outer electronic configuration, then thier shape and hybridization should also be same,yet some of isoelectronic species are not isostructural,why??

Discussion

17.	A liquid is in equilibrium with its vapour in a sealed container at a fixed temperature. The volume of the container is suddenly increased. What is the initial effect of the change on vapour pressure? How do rates of evaporation and condensation change initially? What happens when equilibrium is restored finally and what will be the final vapour pressure? Assign oxidation numbers to the underlined elements in each of the following species: NaHS––O4 H4P––2O7 K2Mn––––O4 CaO––2 NaB––H4 H2S––2O7 KAlS––O4)2.12H2O
Answer» A liquid is in equilibrium with its vapour in a sealed container at a fixed temperature. The volume of the container is suddenly increased. What is the initial effect of the change on vapour pressure? How do rates of evaporation and condensation change initially? What happens when equilibrium is restored finally and what will be the final vapour pressure? Assign oxidation numbers to the underlined elements in each of the following species: $N a H S - - O_{4}$ $H_{4} {P - -}_{2} O_{7}$ $K_{2} M n - -- - O_{4}$ $C a {O - -}_{2}$ $N a B - - H_{4}$ $H_{2} {S - -}_{2} O_{7}$ $K A l S - - O_{4})_{2} .12 H_{2} O$

17.

A liquid is in equilibrium with its vapour in a sealed container at a fixed temperature. The volume of the container is suddenly increased. What is the initial effect of the change on vapour pressure? How do rates of evaporation and condensation change initially? What happens when equilibrium is restored finally and what will be the final vapour pressure? Assign oxidation numbers to the underlined elements in each of the following species: NaHS––O4 H4P––2O7 K2Mn––––O4 CaO––2 NaB––H4 H2S––2O7 KAlS––O4)2.12H2O

Answer»

A liquid is in equilibrium with its vapour in a sealed container at a fixed temperature. The volume of the container is suddenly increased.

What is the initial effect of the change on vapour pressure?

How do rates of evaporation and condensation change initially?

What happens when equilibrium is restored finally and what will be the final vapour pressure?

Assign oxidation numbers to the underlined elements in each of the following species:
$N a H S - - O_{4}$

$H_{4} {P - -}_{2} O_{7}$

$K_{2} M n - -- - O_{4}$

$C a {O - -}_{2}$

$N a B - - H_{4}$

$H_{2} {S - -}_{2} O_{7}$

$K A l S - - O_{4})_{2} .12 H_{2} O$

Discussion

18.	Which of the following pair/s have nearly same size?
Answer» Which of the following pair/s have nearly same size?

Discussion

19.	In which block Lanthanoids and Actinoids are actually exists ?
Answer» In which block Lanthanoids and Actinoids are actually exists ?

Discussion

20.	36. What is the reaction between fluorine and hot and concentrated NaOH?
Answer» 36. What is the reaction between fluorine and hot and concentrated NaOH?

Discussion

21.	Consider the reactions (i) CO(g)+H2O(g)⇌CO2(g)+H2(g);K1(ii) CH4(g)+H2O(g)⇌CO(g)+3H2(g);K2(iii) CH4(g)+2H2O(g)⇌CO2(g)+4H2(g);K3 which of the following is correct?
Answer» Consider the reactions $(i) C O (g) + H_{2} O (g) ⇌ C O_{2} (g) + H_{2} (g); K_{1} (i i) C H_{4} (g) + H_{2} O (g) ⇌ C O (g) + 3 H_{2} (g); K_{2} (i i i) C H_{4} (g) + 2 H_{2} O (g) ⇌ C O_{2} (g) + 4 H_{2} (g); K_{3}$ which of the following is correct?

Discussion

22.	The solubility of Ca(OH)2 in water is:[Given: The solubility product of Ca(OH)2 in water = 5.5×10−6, 1.37513=1.11]
Answer» The solubility of $C a (O H)_{2}$ in water is: [Given: The solubility product of $C a (O H)_{2}$ in water = $5.5 \times 10^{- 6}, {1.375}^{\frac{1}{3}} = 1.11$ ]

Discussion

23.	99 which of the following reagent will distinguish between two functional isomer of formulaC2H4O2? A NaHCO3 B CuSO4 C C2H5CL All of the above
Answer» 99 which of the following reagent will distinguish between two functional isomer of formulaC2H4O2? A NaHCO3 B CuSO4 C C2H5CL All of the above

Discussion

24.	What is ionisation
Answer» What is ionisation

Discussion

25.	in a cubic crystal ,if A atoms are present on all the corners ,B atoms on alternate face center and C atoms on the body center ,then formula of the compound is?
Answer» in a cubic crystal ,if A atoms are present on all the corners ,B atoms on alternate face center and C atoms on the body center ,then formula of the compound is?

Discussion

26.	What is the reason for atomic orbitals to form hybrid orbitals in a chemical bond? What causes them to do so?
Answer» What is the reason for atomic orbitals to form hybrid orbitals in a chemical bond? What causes them to do so?

Discussion

27.	pressure exerted by one mole of an ideal gas kept in a vessel of V L havong root mean square speed of molecules v and m mass of each molecule is correctly given by the equatio
Answer» pressure exerted by one mole of an ideal gas kept in a vessel of V L havong root mean square speed of molecules v and m mass of each molecule is correctly given by the equatio

Discussion

28.	Calculate the value of (x−y) for XeOF4, where x = total number of lone pairs in XeOF4 and y = total number dπ−pπ bonds in XeOF4.
Answer» Calculate the value of $(x - y)$ for $X e O F_{4}$ , where $x$ = total number of lone pairs in $X e O F_{4}$ and $y$ = total number $d π - p π$ bonds in $X e O F_{4}$ .

Discussion

29.	3. How to determine the magnitude of lattice energy?
Answer» 3. How to determine the magnitude of lattice energy?

Discussion

30.	Which of the following is most stable, and which one is least ?HCHO CH3CHO I II CH3COCH3 Cl3CCHO III IV
Answer» Which of the following is most stable, and which one is least ? $H C H O$ $C H_{3} C H O$ I II $C H_{3} C O C H_{3}$ $C l_{3} C C H O$ III IV

Discussion

31.	If relative lowering in vapour pressure is 0.5 for aqueous solution of urea then 1. m=0.52 . Xsolute=13 M=0.5 4. %w/w= (30/39) ×100.
Answer» If relative lowering in vapour pressure is 0.5 for aqueous solution of urea then 1. m=0.5 2 . Xsolute=1 3 M=0.5 4. %w/w= (30/39) ×100 .

Discussion

32.	In electronic configuration of Fe if 3d orbital is filled at last than why electron is removed 4s orbital and not from 3d orbital
Answer» In electronic configuration of Fe if 3d orbital is filled at last than why electron is removed 4s orbital and not from 3d orbital

Discussion

33.	1. If the de Broglie wavelength of an electron revolving in 2nd orbit of H atom is x then radius of that orbit is given by Options:,A)X/pi B)2X/pi C)X/2pi D)cannot be determined
Answer» 1. If the de Broglie wavelength of an electron revolving in 2nd orbit of H atom is x then radius of that orbit is given by Options:,A)X/pi B)2X/pi C)X/2pi D)cannot be determined

Discussion

34.	The second most abundant metal in the earths crust is
Answer» The second most abundant metal in the earths crust is

Discussion

35.	Among the following acids, if number of acids stronger than H3PO4 is x and number of monobasic acid is y then, xy would be?H2CO3, H3PO3, CH3COOH, H2SO4, H3PO2, H4P2O7, HClO4, H3BO3, HNO3.
Answer» Among the following acids, if number of acids stronger than $H_{3} P O_{4}$ is $x$ and number of monobasic acid is $y$ then, $\frac{x}{y}$ would be? $H_{2} C O_{3}, H_{3} P O_{3}, C H_{3} C O O H, H_{2} S O_{4}, H_{3} P O_{2}, H_{4} P_{2} O_{7}, H C l O_{4}, H_{3} B O_{3}, H N O_{3} .$

Discussion

36.	Water flows through a tunnel from the reservoir of a dam towards the turbine installed in its power plant. The power plant is situated h meter below the reservoir. If the ratio of the cross-sectional areas of the tunnel at the reservoir and power station end is n, find the speed of the water entering into the turbine.
Answer» Water flows through a tunnel from the reservoir of a dam towards the turbine installed in its power plant. The power plant is situated h meter below the reservoir. If the ratio of the cross-sectional areas of the tunnel at the reservoir and power station end is n, find the speed of the water entering into the turbine.

Discussion

37.	An organic compound (C8H10O2) rotates plane-polarized light. It produces pink color with neutral FeCl3 solution. What is the total number of all the possible isomers for this compound?
Answer» An organic compound $(C_{8} H_{10} O_{2})$ rotates plane-polarized light. It produces pink color with neutral $F e C l_{3}$ solution. What is the total number of all the possible isomers for this compound?

Discussion

38.	Difference between sp3d2 & d2sp3 & how to predict whether a compound is having either of them
Answer» Difference between sp3d2 & d2sp3 & how to predict whether a compound is having either of them

Discussion

39.	For the reaction C2H5OH + HX = C2H5Xcatalyst is ZnX2 . The order of reactivity is1 HI>HCl>HBr2. HCl>HBr>HCl3. Hbr>HI>HCl4.none
Answer» For the reaction C2H5OH + HX = C2H5X catalyst is ZnX2 . The order of reactivity is 1 HI>HCl>HBr 2. HCl>HBr>HCl 3. Hbr>HI>HCl 4.none

Discussion

40.	Sulphuric acid provides a example of
Answer» Sulphuric acid provides a example of

40.

Sulphuric acid provides a example of

Answer»

Sulphuric acid provides a example of

Discussion

41.	1)The predominant form of hydrogen is protium What does this statement mean?2)which form of hydrogen is abundantly found ?
Answer» 1)The predominant form of hydrogen is protium What does this statement mean? 2)which form of hydrogen is abundantly found ?

Discussion

42.	C6H5COONaNaOH+CaO−−−−−−−−→ΔACl2−−−−−→UV,500KB Incorrect statements among the following I) All carbon atoms in 'B' are sp2hybridisedII) Compound 'B' is BHC III) Hybridisation of carbon atoms changes from sp3 to sp2 from A to B reaction
Answer» $C_{6} H_{5} C O O N a N a O H + C a O - ------- \to Δ A C l_{2} - ---- \to U V, 500 K B$ Incorrect statements among the following I) All carbon atoms in 'B' are sp²hybridisedII) Compound 'B' is BHC III) Hybridisation of carbon atoms changes from sp³ to sp² from A to B reaction

42.

C6H5COONaNaOH+CaO−−−−−−−−→ΔACl2−−−−−→UV,500KB Incorrect statements among the following I) All carbon atoms in 'B' are sp2hybridisedII) Compound 'B' is BHC III) Hybridisation of carbon atoms changes from sp3 to sp2 from A to B reaction

Answer»

$C_{6} H_{5} C O O N a N a O H + C a O - ------- \to Δ A C l_{2} - ---- \to U V, 500 K B$

Incorrect statements among the following

I) All carbon atoms in 'B' are sp²hybridisedII) Compound 'B' is BHC

III) Hybridisation of carbon atoms changes from sp³ to sp² from A to B

reaction

Discussion

43.	diimide and wollf kishner reagent and tollen and fehling sol is used in conversion of - list al
Answer» diimide and wollf kishner reagent and tollen and fehling sol is used in conversion of - list al

Discussion

44.	y=10/(3sin+4cos) then minimum value of y is
Answer» y=10/(3sin+4cos) then minimum value of y is

Discussion

45.	Which enzyme converts glucose into alcohol?
Answer» Which enzyme converts glucose into alcohol?

45.

Which enzyme converts glucose into alcohol?

Answer»

Which enzyme converts glucose into alcohol?

Discussion

46.	define alteration effect. due to which the melting point of carboxylic acid decreases.
Answer» define alteration effect. due to which the melting point of carboxylic acid decreases.

Discussion

47.	How to convert Picric acid into acetanalide
Answer» How to convert Picric acid into acetanalide

Discussion

48.	One mole of an ideal gas is kept enclosed under a light piston (area =10−2 m2) connected by a compressed spring (spring constant =200 N/m). The volume of gas is 0.83 m3 and its temperature is 100 K. The gas is heated so that it compresses the spring by further 0.1 m. Find the workdone by the gas during the process (in joule). (Take R=8.3 J/k-mole and suppose that there is no atmosphere)
Answer» One mole of an ideal gas is kept enclosed under a light piston (area $= 10^{- 2} m^{2})$ connected by a compressed spring (spring constant $= 200 N/m$ ). The volume of gas is $0.83 m^{3}$ and its temperature is $100 K$ . The gas is heated so that it compresses the spring by further $0.1 m$ . Find the workdone by the gas during the process (in joule). (Take $R = 8.3 J/k-mole$ and suppose that there is no atmosphere)

Discussion

49.	0. The anion of acetylacetine (acac) forms Co (acac)shelate with Co". The rings of the chelateare(a) five momberedb) four membered(c) six memberd (d) three membered5
Answer» 0. The anion of acetylacetine (acac) forms Co (acac)shelate with Co". The rings of the chelateare(a) five momberedb) four membered(c) six memberd (d) three membered5

Discussion

50.	29.What will happen if the pH of the solution of 0.001 M Mg(NO3)2 solution is adjusted to pH = 9 ( Ksp Mg(OH)2 = 8.9 X 10-12) a) ppt will take place b) ppt will not take place c) solution will be saturated d) None of the above
Answer» 29.What will happen if the pH of the solution of 0.001 M Mg(NO3)2 solution is adjusted to pH = 9 ( Ksp Mg(OH)2 = 8.9 X 10-12) a) ppt will take place b) ppt will not take place c) solution will be saturated d) None of the above

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

13. In fcc packing,tetrahedral voids divide a body diagonal in the ratio of A)1:1:1 B)1:2:2 C)1:2:1 D)1:2:3

32. How many enols(inclueding sterio isomers) exist for 3-Hexanone ?

The coordination number and oxidation number of the central metal ion in the complex (NH4)2[Pt(Cl)6] is :

(a) Write the dispersed phase and dispersion medium of milk. (b) Write one similarity between physisorption and chemisorption. (c) Write the chemical method by which Fe(OH)3 sol is prepared from FeCl3.

Value of CFSE, in tetrahedral complex having 3d4 configuration of metal ion, surrounded by weak field ligands, will be

Substance A tetramerises in water to the extent of 80% . A solution of 2.5 g of A in 100g of water lowers the freezing point by 0.3 degrees . The molar mass of A is (Kf for water is = 1.86 K Kg / mol)(1) 122 (2) 31 (3) 244 (4) 62

Which one of the following configuration represents a noble gas ?

which one is correct 1. 3pen†an one and 3methyl 2 bu†an one are position isomers

Methyl - ethyl ketone can be reduced to n-butane using the reaction:

ntMolarity of liquid HCL, if density of solution is 1.17gm/cc?n

Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambinent condition is:

A mixture of gas at NTP for which =1.5 is suddenly compressed to 1/9th of its original volume. The final temperature of mixture is ?

Why did the discovery of neutrons came very late?

Classify each of the following as being either a p - type or a n - type semiconductor : (i) Ge doped with In (ii) Si doped with B

isoelectronic species have same outer electronic configuration, then thier shape and hybridization should also be same,yet some of isoelectronic species are not isostructural,why??

Which of the following pair/s have nearly same size?

In which block Lanthanoids and Actinoids are actually exists ?

36. What is the reaction between fluorine and hot and concentrated NaOH?

Consider the reactions (i) CO(g)+H2O(g)⇌CO2(g)+H2(g);K1(ii) CH4(g)+H2O(g)⇌CO(g)+3H2(g);K2(iii) CH4(g)+2H2O(g)⇌CO2(g)+4H2(g);K3 which of the following is correct?

The solubility of Ca(OH)2 in water is:[Given: The solubility product of Ca(OH)2 in water = 5.5×10−6, 1.37513=1.11]

99 which of the following reagent will distinguish between two functional isomer of formulaC2H4O2? A NaHCO3 B CuSO4 C C2H5CL All of the above

What is ionisation

in a cubic crystal ,if A atoms are present on all the corners ,B atoms on alternate face center and C atoms on the body center ,then formula of the compound is?

What is the reason for atomic orbitals to form hybrid orbitals in a chemical bond? What causes them to do so?

pressure exerted by one mole of an ideal gas kept in a vessel of V L havong root mean square speed of molecules v and m mass of each molecule is correctly given by the equatio

Calculate the value of (x−y) for XeOF4, where x = total number of lone pairs in XeOF4 and y = total number dπ−pπ bonds in XeOF4.

3. How to determine the magnitude of lattice energy?

Which of the following is most stable, and which one is least ?HCHO CH3CHO I II CH3COCH3 Cl3CCHO III IV

If relative lowering in vapour pressure is 0.5 for aqueous solution of urea then 1. m=0.52 . Xsolute=13 M=0.5 4. %w/w= (30/39) ×100.

In electronic configuration of Fe if 3d orbital is filled at last than why electron is removed 4s orbital and not from 3d orbital

1. If the de Broglie wavelength of an electron revolving in 2nd orbit of H atom is x then radius of that orbit is given by Options:,A)X/pi B)2X/pi C)X/2pi D)cannot be determined

The second most abundant metal in the earths crust is

Among the following acids, if number of acids stronger than H3PO4 is x and number of monobasic acid is y then, xy would be?H2CO3, H3PO3, CH3COOH, H2SO4, H3PO2, H4P2O7, HClO4, H3BO3, HNO3.

An organic compound (C8H10O2) rotates plane-polarized light. It produces pink color with neutral FeCl3 solution. What is the total number of all the possible isomers for this compound?

Difference between sp3d2 & d2sp3 & how to predict whether a compound is having either of them

For the reaction C2H5OH + HX = C2H5Xcatalyst is ZnX2 . The order of reactivity is1 HI>HCl>HBr2. HCl>HBr>HCl3. Hbr>HI>HCl4.none

Sulphuric acid provides a example of

1)The predominant form of hydrogen is protium What does this statement mean?2)which form of hydrogen is abundantly found ?

C6H5COONaNaOH+CaO−−−−−−−−→ΔACl2−−−−−→UV,500KB Incorrect statements among the following I) All carbon atoms in 'B' are sp2hybridisedII) Compound 'B' is BHC III) Hybridisation of carbon atoms changes from sp3 to sp2 from A to B reaction

diimide and wollf kishner reagent and tollen and fehling sol is used in conversion of - list al

y=10/(3sin+4cos) then minimum value of y is

Which enzyme converts glucose into alcohol?

define alteration effect. due to which the melting point of carboxylic acid decreases.

How to convert Picric acid into acetanalide

0. The anion of acetylacetine (acac) forms Co (acac)shelate with Co". The rings of the chelateare(a) five momberedb) four membered(c) six memberd (d) three membered5

29.What will happen if the pH of the solution of 0.001 M Mg(NO3)2 solution is adjusted to pH = 9 ( Ksp Mg(OH)2 = 8.9 X 10-12) a) ppt will take place b) ppt will not take place c) solution will be saturated d) None of the above