46295 + Interview Questions in Chemistry

1.	54 Why H2C2O4 act only as reducing agent while carbon can show oxidation state below than that present in H2C2O4
Answer» 54 Why H2C2O4 act only as reducing agent while carbon can show oxidation state below than that present in H2C2O4

Discussion

2.	The average oxidation state of Fe in Fe3O4 is:
Answer» The average oxidation state of Fe in $F e_{3} O_{4}$ is:

Discussion

3.	What is avagadro number and standard atomic mass?
Answer» What is avagadro number and standard atomic mass?

Discussion

4.	Which one of the following orbitals can hold only two electrons?
Answer» Which one of the following orbitals can hold only two electrons?

Discussion

5.	Oxidation involves :
Answer» Oxidation involves :

Discussion

6.	Select the correct order of polarisability of the given species.
Answer» Select the correct order of polarisability of the given species.

Discussion

7.	Which of the following is false regarding dipole moments of the following
Answer» Which of the following is false regarding dipole moments of the following

Discussion

8.	A FCC crystal of O2− (oxide) ion has Mnn+ ions in all octahedral voids. Then value of n is (1) 4 (2) 1 (3) 2 (4) 3
Answer» A FCC crystal of $O^{2 -}$ (oxide) ion has ${M n}^{n +}$ ions in all octahedral voids. Then value of n is (1) 4 (2) 1 (3) 2 (4) 3

8.

A FCC crystal of O2− (oxide) ion has Mnn+ ions in all octahedral voids. Then value of n is (1) 4 (2) 1 (3) 2 (4) 3

Answer»

A FCC crystal of $O^{2 -}$ (oxide) ion has ${M n}^{n +}$ ions in all octahedral voids. Then value of n is

(1) 4

(2) 1

(3) 2

(4) 3

Discussion

9.	The KE and PE (in eV) of electron present in third Bohr’s orbit of hydrogen atom respectively are
Answer» The KE and PE (in eV) of electron present in third Bohr’s orbit of hydrogen atom respectively are

Discussion

10.	31.acetone in the solution is.of sIf the mole fraction of acetone in ethyl alcohol is 0.3. Then the molality o
Answer» 31.acetone in the solution is.of sIf the mole fraction of acetone in ethyl alcohol is 0.3. Then the molality o

Discussion

11.	A xenon compound ‘A’ upon partial hydrolysis gives XeO2F2. The number of lone pairs of electrons present in compound A is ______. (Round off to the Nearest Integer).
Answer» A xenon compound ‘A’ upon partial hydrolysis gives $X e O_{2} F_{2}$ . The number of lone pairs of electrons present in compound A is ______. (Round off to the Nearest Integer).

Discussion

12.	The carboxylate ion formed due to the deprotonation of the above compound will be most stable, if X is:
Answer» The carboxylate ion formed due to the deprotonation of the above compound will be most stable, if X is:

Discussion

13.	Which of the following acids acts as reducing agent?
Answer» Which of the following acids acts as reducing agent?

Discussion

14.	A metalloid of nitrogen family is:
Answer» A metalloid of nitrogen family is:

Discussion

15.	Why we need to balance a equation
Answer» Why we need to balance a equation

Discussion

16.	The hydrogen electrode is dipped in a solution of pH=3 at 25∘C. The reduction potential of the electrode would be (the value of 2.303RTF is 0.059 V):
Answer» The hydrogen electrode is dipped in a solution of $p H = 3$ at $25^{\circ} C$ . The reduction potential of the electrode would be (the value of $\frac{2.303 R T}{F}$ is $0.059 V$ ):

Discussion

17.	50.If radius of an octahedral void is r and atomic radius of atoms assuming cubical close packing is R. Then the relation between r and R is
Answer» 50.If radius of an octahedral void is r and atomic radius of atoms assuming cubical close packing is R. Then the relation between r and R is

Discussion

18.	Why is resonance energy subtracted from heat of hydrogenation?
Answer» Why is resonance energy subtracted from heat of hydrogenation?

Discussion

19.	which d-block element has highest heat of atomisation and why explain in detail
Answer» which d-block element has highest heat of atomisation and why explain in detail

Discussion

20.	Explain resonance in 3chloro prop-1-yne
Answer» Explain resonance in 3chloro prop-1-yne

Discussion

21.	Question 18Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order. (i) Rutherford's atomic model(ii) Thomson's atomic model (iii) Bohr's atomic model (a) (i), (ii) and (iii)(b) (ii), (iii) and (i)(c) (ii), (i) and (iii)(d) (iii), (ii) and (i)
Answer» Question 18 Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order. (i) Rutherford's atomic model (ii) Thomson's atomic model (iii) Bohr's atomic model (a) (i), (ii) and (iii) (b) (ii), (iii) and (i) (c) (ii), (i) and (iii) (d) (iii), (ii) and (i)

Discussion

22.	Which of the following chloride is/are partially hydrolysed in water(1) Bicl3(2) PCl3(3) AsCl3(4) NCl3
Answer» Which of the following chloride is/are partially hydrolysed in water(1) Bicl3(2) PCl3(3) AsCl3(4) NCl3

Discussion

23.	Which of the following is TRUE for Flourite type structure?
Answer» Which of the following is TRUE for Flourite type structure?

Discussion

24.	For three vectors a, b and cwhy does a + (b + c) = (a + b) + c?
Answer» For three vectors a, b and c why does a + (b + c) = (a + b) + c?

Discussion

25.	reaction of 4nitrobenzenecarbaldehyde with benzoic acid anhydride followed by heating
Answer» reaction of 4nitrobenzenecarbaldehyde with benzoic acid anhydride followed by heating

Discussion

26.	Determine the percentage of water of crystallization in a sample of green vitriol.
Answer» Determine the percentage of water of crystallization in a sample of green vitriol.

Discussion

27.	Which of the following exists as Zwitter ion in aqueous medium
Answer» Which of the following exists as Zwitter ion in aqueous medium

Discussion

28.	A sigma bonded molecule MX3 is T shaped the number of non bonding pairs of electrons
Answer» A sigma bonded molecule MX3 is T shaped the number of non bonding pairs of electrons

Discussion

29.	Which of the following halids cannot be hydrolysed ?(i)TeF6(ii) SF6(iii) NCl3(iv) NF3Choose the correct code1) iii and iv2) i , ii, and iii3)i , ii and iv4) ii ,iv
Answer» Which of the following halids cannot be hydrolysed ? (i)TeF6 (ii) SF6 (iii) NCl3 (iv) NF3 Choose the correct code 1) iii and iv 2) i , ii, and iii 3)i , ii and iv 4) ii ,iv

Discussion

30.	22. Find the no. Of optical isomers of 3-bromo 2,4- pentane diol
Answer» 22. Find the no. Of optical isomers of 3-bromo 2,4- pentane diol

Discussion

31.	{ A sample of }NaHCO_3+Na_2CO_3 required }}{20ml of }HCl using phenolphthalein as indicator }}{ and }35ml more required if methyl orange is used }}{ as indicator. Then molar ratio of }NaHCO_3 to }}{Na_2CO_3 is
Answer» { A sample of }NaHCO_3+Na_2CO_3 required }}{20ml of }HCl using phenolphthalein as indicator }}{ and }35ml more required if methyl orange is used }}{ as indicator. Then molar ratio of }NaHCO_3 to }}{Na_2CO_3 is

Discussion

32.	Why acids or bases do not react with plastic and similar items?
Answer» Why acids or bases do not react with plastic and similar items?

Discussion

33.	An ion with mass number 37 possesses one unit of negative charge. If the ion contains 11.1% more neutrons than the electrons, find the symbol of the ion.
Answer» An ion with mass number 37 possesses one unit of negative charge. If the ion contains 11.1% more neutrons than the electrons, find the symbol of the ion.

Discussion

34.	A compound H2X with molar weight of 80 g is dissolved in a solvent having density of 0.4 g mL−1. Assuming no change in volume upon dissolution, the molality of a 3.2 molar solution is ___
Answer» A compound $H_{2} X$ with molar weight of 80 g is dissolved in a solvent having density of 0.4 g $m L^{- 1} .$ Assuming no change in volume upon dissolution, the molality of a 3.2 molar solution is ___

Discussion

35.	A solution of glucose in water is labelled as 10%(w/w) . What should be the molality and molecular fraction of each component in the solution? What will be the molarity of the solution if it's density is 1.2 g/ml and molar mass of glucose is 180M?
Answer» A solution of glucose in water is labelled as 10%(w/w) . What should be the molality and molecular fraction of each component in the solution? What will be the molarity of the solution if it's density is 1.2 g/ml and molar mass of glucose is 180M?

Discussion

36.	0.7g of an organic compound was Kjeldahlised and ammonia evolved was absorbed in 50ml of semi-molar (0.5M) H2SO4. The residual acid required 80ml of 0.5M NaOH. Determine the percentage of nitrogen in the compound. a.) 80 b.) 40 c.) 20 d.) 10
Answer» 0.7g of an organic compound was Kjeldahlised and ammonia evolved was absorbed in 50ml of semi-molar (0.5M) H₂SO₄. The residual acid required 80ml of 0.5M NaOH. Determine the percentage of nitrogen in the compound. a.) 80 b.) 40 c.) 20 d.) 10

Discussion

37.	The sharp melting point of crystalline solids is due to _________.
Answer» The sharp melting point of crystalline solids is due to _________.

Discussion

38.	The major product [B] in the following sequence of reaction is
Answer» The major product [B] in the following sequence of reaction is

Discussion

39.	The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30^° C?(i) Na(ii) K(iii) Rb(iv) Cs
Answer» The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30^° C?(i) Na(ii) K(iii) Rb(iv) Cs

Discussion

40.	what is the structure NO2. Does it have 2 double bonds or only one double bond
Answer» what is the structure NO2. Does it have 2 double bonds or only one double bond

Discussion

41.	In which of the following reactions the final product will give a black precipitate of HgS when treated with CS2 followed by HgCl2?
Answer» In which of the following reactions the final product will give a black precipitate of HgS when treated with $C S_{2}$ followed by $H g C l_{2}$ ?

Discussion

42.	The mass of O atoms present in 5.675 litre of carbon dioxide at STP is:
Answer» The mass of $O$ atoms present in $5.675$ litre of carbon dioxide at STP is:

Discussion

43.	A 10.0 cm column of air is trapped by a column of 4 cm long Hg in a capillary tube of uniform bore when the tube is held horizontally at 1 atm. The length of the air column when the tube is held vertically with the open end up is: Given: Patm=76 cm of Hg
Answer» A $10.0 cm$ column of air is trapped by a column of 4 cm long $H g$ in a capillary tube of uniform bore when the tube is held horizontally at $1 atm$ . The length of the air column when the tube is held vertically with the open end up is: Given: $P_{a t m} = 76$ cm of Hg

Discussion

44.	The equilibrium constant at 427∘C for the reaction: is KP=8×10−5. Calculate the value of ΔG∘ for the reaction at 427∘.Take ln2 =0.3 and R = 8.3
Answer» The equilibrium constant at $427^{\circ} C$ for the reaction: is $K_{P} = 8 \times 10^{- 5}$ . Calculate the value of $Δ G^{\circ}$ for the reaction at $427^{\circ}$ .Take ln2 =0.3 and R = 8.3

Discussion

45.	A solution of NaCl is
Answer» A solution of NaCl is

Discussion

46.	Least reactive towards nucleophilic addition among the following is
Answer» Least reactive towards nucleophilic addition among the following is

Discussion

47.	PCl5 on reaction with propanone gives
Answer» PCl5 on reaction with propanone gives

Discussion

48.	41. Temperature Coefficient for most of the reaction lies between : 1. 1 & 3 2. 2 & 3 3. 1 & 4 4. 2 & 4
Answer» 41. Temperature Coefficient for most of the reaction lies between : 1. 1 & 3 2. 2 & 3 3. 1 & 4 4. 2 & 4

Discussion

49.	In which of the following compounds carbonchlorine bond distance is minimum(1) CH2Cl(2) C6H5 CH2 CI(3) CH2=CH-Cl(4) CH2= CH CH2 Cl
Answer» In which of the following compounds carbonchlorine bond distance is minimum(1) CH2Cl(2) C6H5 CH2 CI(3) CH2=CH-Cl(4) CH2= CH CH2 Cl

Discussion

50.	Which of the following is correct with respect to energy for multi-electron system? I. 1s<2s II. 2p<3pIII. 3dxy=3dyzIV. 3d>4s
Answer» Which of the following is correct with respect to energy for multi-electron system? $I . 1 s < 2 s I I . 2 p < 3 p I I I . 3 d_{x y} = 3 d_{y z} I V . 3 d > 4 s$

50.

Which of the following is correct with respect to energy for multi-electron system? I. 1s<2s II. 2p<3pIII. 3dxy=3dyzIV. 3d>4s

Answer»

Which of the following is correct with respect to energy for multi-electron system?

$I . 1 s < 2 s I I . 2 p < 3 p I I I . 3 d_{x y} = 3 d_{y z} I V . 3 d > 4 s$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

54 Why H2C2O4 act only as reducing agent while carbon can show oxidation state below than that present in H2C2O4

The average oxidation state of Fe in Fe3O4 is:

What is avagadro number and standard atomic mass?

Which one of the following orbitals can hold only two electrons?

Oxidation involves :

Select the correct order of polarisability of the given species.

Which of the following is false regarding dipole moments of the following

A FCC crystal of O2− (oxide) ion has Mnn+ ions in all octahedral voids. Then value of n is (1) 4 (2) 1 (3) 2 (4) 3

The KE and PE (in eV) of electron present in third Bohr’s orbit of hydrogen atom respectively are

31.acetone in the solution is.of sIf the mole fraction of acetone in ethyl alcohol is 0.3. Then the molality o

A xenon compound ‘A’ upon partial hydrolysis gives XeO2F2. The number of lone pairs of electrons present in compound A is ______. (Round off to the Nearest Integer).

The carboxylate ion formed due to the deprotonation of the above compound will be most stable, if X is:

Which of the following acids acts as reducing agent?

A metalloid of nitrogen family is:

Why we need to balance a equation

The hydrogen electrode is dipped in a solution of pH=3 at 25∘C. The reduction potential of the electrode would be (the value of 2.303RTF is 0.059 V):

50.If radius of an octahedral void is r and atomic radius of atoms assuming cubical close packing is R. Then the relation between r and R is

Why is resonance energy subtracted from heat of hydrogenation?

which d-block element has highest heat of atomisation and why explain in detail

Explain resonance in 3chloro prop-1-yne

Which of the following chloride is/are partially hydrolysed in water(1) Bicl3(2) PCl3(3) AsCl3(4) NCl3

Which of the following is TRUE for Flourite type structure?

For three vectors a, b and cwhy does a + (b + c) = (a + b) + c?

reaction of 4nitrobenzenecarbaldehyde with benzoic acid anhydride followed by heating

Determine the percentage of water of crystallization in a sample of green vitriol.

Which of the following exists as Zwitter ion in aqueous medium

A sigma bonded molecule MX3 is T shaped the number of non bonding pairs of electrons

Which of the following halids cannot be hydrolysed ?(i)TeF6(ii) SF6(iii) NCl3(iv) NF3Choose the correct code1) iii and iv2) i , ii, and iii3)i , ii and iv4) ii ,iv

22. Find the no. Of optical isomers of 3-bromo 2,4- pentane diol

{ A sample of }NaHCO_3+Na_2CO_3 required }}{20ml of }HCl using phenolphthalein as indicator }}{ and }35ml more required if methyl orange is used }}{ as indicator. Then molar ratio of }NaHCO_3 to }}{Na_2CO_3 is

Why acids or bases do not react with plastic and similar items?

An ion with mass number 37 possesses one unit of negative charge. If the ion contains 11.1% more neutrons than the electrons, find the symbol of the ion.

A compound H2X with molar weight of 80 g is dissolved in a solvent having density of 0.4 g mL−1. Assuming no change in volume upon dissolution, the molality of a 3.2 molar solution is ___

A solution of glucose in water is labelled as 10%(w/w) . What should be the molality and molecular fraction of each component in the solution? What will be the molarity of the solution if it's density is 1.2 g/ml and molar mass of glucose is 180M?

0.7g of an organic compound was Kjeldahlised and ammonia evolved was absorbed in 50ml of semi-molar (0.5M) H​​​​​​2​​​​​SO​​​4. The residual acid required 80ml of 0.5M NaOH. Determine the percentage of nitrogen in the compound. a.) 80 b.) 40 c.) 20 d.) 10

The sharp melting point of crystalline solids is due to _________.

The major product [B] in the following sequence of reaction is

The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30^° C?(i) Na(ii) K(iii) Rb(iv) Cs

what is the structure NO2. Does it have 2 double bonds or only one double bond

In which of the following reactions the final product will give a black precipitate of HgS when treated with CS2 followed by HgCl2?

The mass of O atoms present in 5.675 litre of carbon dioxide at STP is:

A 10.0 cm column of air is trapped by a column of 4 cm long Hg in a capillary tube of uniform bore when the tube is held horizontally at 1 atm. The length of the air column when the tube is held vertically with the open end up is: Given: Patm=76 cm of Hg

The equilibrium constant at 427∘C for the reaction: is KP=8×10−5. Calculate the value of ΔG∘ for the reaction at 427∘.Take ln2 =0.3 and R = 8.3

A solution of NaCl is

Least reactive towards nucleophilic addition among the following is

PCl5 on reaction with propanone gives

41. Temperature Coefficient for most of the reaction lies between : 1. 1 & 3 2. 2 & 3 3. 1 & 4 4. 2 & 4

In which of the following compounds carbonchlorine bond distance is minimum(1) CH2Cl(2) C6H5 CH2 CI(3) CH2=CH-Cl(4) CH2= CH CH2 Cl

Which of the following is correct with respect to energy for multi-electron system? I. 1s&lt;2s II. 2p&lt;3pIII. 3dxy=3dyzIV. 3d&gt;4s

0.7g of an organic compound was Kjeldahlised and ammonia evolved was absorbed in 50ml of semi-molar (0.5M) H2SO4. The residual acid required 80ml of 0.5M NaOH. Determine the percentage of nitrogen in the compound. a.) 80 b.) 40 c.) 20 d.) 10

Which of the following is correct with respect to energy for multi-electron system? I. 1s<2s II. 2p<3pIII. 3dxy=3dyzIV. 3d>4s