46295 + Interview Questions in Chemistry

1.	Following compounds are given i) CH3CH2OH ii)CH3COCH3 iii) (CH3)2 CHOH iv) CH3OH Which of the above compound/s on being warmed with iodine solution and NaOH will give iodoform?
Answer» Following compounds are given i) CH₃CH₂OH ii)CH₃COCH₃ iii) (CH₃)₂ CHOH iv) CH₃OH Which of the above compound/s on being warmed with iodine solution and NaOH will give iodoform?

1.

Following compounds are given i) CH3CH2OH ii)CH3COCH3 iii) (CH3)2 CHOH iv) CH3OH Which of the above compound/s on being warmed with iodine solution and NaOH will give iodoform?

Answer»

Following compounds are given

i) CH₃CH₂OH ii)CH₃COCH₃ iii) (CH₃)₂ CHOH iv) CH₃OH Which of the above compound/s on being warmed with iodine solution and NaOH will give iodoform?

Discussion

2.	In the following reaction : H2O2(aq)+Cl2O7(aq)→ClO−2(aq)+O2(g) Moles of OH− and H2O respectively present in a balanced equation in a basic medium are x and y. Calculate the value of x+y:
Answer» In the following reaction : $H_{2} O_{2} (a q) + C l_{2} O_{7} (a q) \to C l O_{2}^{-} (a q) + O_{2} (g)$ Moles of $O H^{-}$ and $H_{2} O$ respectively present in a balanced equation in a basic medium are x and y. Calculate the value of x+y:

Discussion

3.	Which of the following statement is true:
Answer» Which of the following statement is true:

Discussion

4.	Among CaH2,NH3,NaH and B2H6 which are covalent hydride
Answer» Among $C a H_{2}, N H_{3}, N a H a n d B_{2} H_{6}$ which are covalent hydride

Discussion

5.	Which of the following alkali metal posses higher boiling and melting point?
Answer» Which of the following alkali metal posses higher boiling and melting point?

Discussion

6.	In a balanced equation H2SO4+xHI→H2S+yI2+zH2O, the values of x,y,z are
Answer» In a balanced equation $H_{2} S O_{4} + x H I \to H_{2} S + y I_{2} + z H_{2} O$ , the values of x,y,z are

Discussion

7.	The bond order of B2 molecule is:
Answer» The bond order of B₂molecule is:

Discussion

8.	The shape and geometry of XeF4 are respectively:
Answer» The shape and geometry of $X e F_{4}$ are respectively:

Discussion

9.	1 mole of a gaseous compound C5H10 is completely burnt in excess of O2. The moles of CO2 formed are:
Answer» 1 mole of a gaseous compound $C_{5} H_{10}$ is completely burnt in excess of $O_{2}$ . The moles of $C O_{2}$ formed are:

Discussion

10.	Write the structure of 4-chloropentan-2-one.
Answer» Write the structure of 4-chloropentan-2-one.

Discussion

11.	Which of the following has maximum boiling point
Answer» Which of the following has maximum boiling point

Discussion

12.	For the given disproportionation reaction: H3PO2→PH3+H3PO3 The equivalent mass of H3PO2 in grams is : (Given : Atomic mass of P=31 u)
Answer» For the given disproportionation reaction: $H_{3} P O_{2} \to P H_{3} + H_{3} P O_{3}$ The equivalent mass of $H_{3} P O_{2}$ in grams is : (Given : $Atomic mass of P = 31 u$ )

Discussion

13.	Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Receptor proteins show selectivity for one chemical messenger over the other. Reason (R) Chemical messenger binds to the receptor site and inhibits its natural function.
Answer» Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Receptor proteins show selectivity for one chemical messenger over the other. Reason (R) Chemical messenger binds to the receptor site and inhibits its natural function.

13.

Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Receptor proteins show selectivity for one chemical messenger over the other. Reason (R) Chemical messenger binds to the receptor site and inhibits its natural function.

Answer»

Assertion and Reason
In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice..
(a) Assertion and reason both are correct statements but reason does not explain assertion.
(b) Assertion and reason both are correct and reason explains asssWon.
(c) Both assertion and reason are Wrong statements.
(d) Assertion is correct statement reason is wrong statement.
(e) Assertion is wrong statement reason is correct statement.

Assertion (A) Receptor proteins show selectivity for one chemical messenger over the other.
Reason (R) Chemical messenger binds to the receptor site and inhibits its natural function.

Discussion

14.	A monochromatic radiation of specific wavelength is incident on H atoms in ground state. H atoms absorb energy and subsequently emit radiations of six different wavelength. Find the wavelength of incident radiation.
Answer» A monochromatic radiation of specific wavelength is incident on $H$ atoms in ground state. $H$ atoms absorb energy and subsequently emit radiations of six different wavelength. Find the wavelength of incident radiation.

Discussion

15.	Which of the followings is incorrect about photochemical smog –
Answer» Which of the followings is incorrect about photochemical smog –

Discussion

16.	In what way is the electronic configuration of the transition elements different from that of non-transition elements?
Answer» In what way is the electronic configuration of the transition elements different from that of non-transition elements?

Discussion

17.	Calculate the mass of residue obtained when CaCO3 is strongly heated and 5.6 L CO2 is produced at STP.
Answer» Calculate the mass of residue obtained when $C a C O_{3}$ is strongly heated and $5.6 L C O_{2}$ is produced at STP.

Discussion

18.	A saturated solution of XCl3 has a vapour pressure of 17.20 mm Hg at 20°C, while pure water vapour pressure is 17.25 mm Hg. Solubility product (Ksp) of XCl3 at 20°C is:
Answer» A saturated solution of $X C l_{3}$ has a vapour pressure of 17.20 mm Hg at 20 $° C$ , while pure water vapour pressure is 17.25 mm Hg. Solubility product ( $K_{s p}$ ) of $X C l_{3}$ at 20 $° C$ is:

Discussion

19.	Find out number of correct statements. (A) N2>N (Ist ionization energy) (B) O2>O (Ist ionization energy) (C) H2>H (Ist ionization energy) (D) N+2>N−2 (Stability) (E) H2>H (Ist Electron Affinity) (F) Na2CO3>Li2CO3 (Thermal stability)
Answer» Find out number of correct statements. (A) $N_{2} > N$ ( $I^{s t}$ ionization energy) (B) $O_{2} > O$ ( $I^{s t}$ ionization energy) (C) $H_{2} > H$ ( $I^{s t}$ ionization energy) (D) $N_{2}^{+} > N_{2}^{-}$ (Stability) (E) $H_{2} > H$ ( $I^{s t}$ Electron Affinity) (F) $N a_{2} C O_{3} > L i_{2} C O_{3}$ (Thermal stability)

Discussion

20.	Among the following species, which pairs are not isostructural NF3,NO−3,BF3,H3O+,HN3
Answer» Among the following species, which pairs are not isostructural $N F_{3}, N O_{3}^{-}, B F_{3}, H_{3} O^{+}, H N_{3}$

Discussion

21.	What is the hybridisation and geometry of BCl3 ?
Answer» What is the hybridisation and geometry of $B C l_{3}$ ?

Discussion

22.	Diamond Enterprises is a store in Apisville that sells specialty luxury items. For several years, Diamond reaped substantial profits and was considering building branch stores in nearby counties. Stibium Industries, for several years the single largest employer in Apisville and the surrounding region, abruptly closed its plant last year, causing widespread unemployment. Only a fraction of the former Stibium workers have found new jobs, and many of these at much lower wages. Early this year, Diamond Enterprises has filed for Chapter 11 bankruptcy, citing the closure of Stibium as one of the primary causes. Which of the following inferences is best supported by the passage?
Answer» Diamond Enterprises is a store in Apisville that sells specialty luxury items. For several years, Diamond reaped substantial profits and was considering building branch stores in nearby counties. Stibium Industries, for several years the single largest employer in Apisville and the surrounding region, abruptly closed its plant last year, causing widespread unemployment. Only a fraction of the former Stibium workers have found new jobs, and many of these at much lower wages. Early this year, Diamond Enterprises has filed for Chapter 11 bankruptcy, citing the closure of Stibium as one of the primary causes. Which of the following inferences is best supported by the passage?

Discussion

23.	The structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One-fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is
Answer» The structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One-fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is

Discussion

24.	At what temperature is the rms speed of hydrogen molecules the same as that of oxygen molecules at 1327∘C ?
Answer» At what temperature is the rms speed of hydrogen molecules the same as that of oxygen molecules at $1327^{\circ} C$ ?

Discussion

25.	How many isomeric diaminobenzoic acid can be converted into m-phenylenediamine on decarboxylation ?
Answer» How many isomeric diaminobenzoic acid can be converted into m-phenylenediamine on decarboxylation ?

Discussion

26.	Self-condensation of two moles of ethyl acetate in presence of Sodium ethoxide yields:
Answer» Self-condensation of two moles of ethyl acetate in presence of Sodium ethoxide yields:

Discussion

27.	Is Cis-[Cr(en)2Cl2]Cl paramagnetic or diamagnetic?
Answer» Is Cis-[Cr(en)2Cl2]Cl paramagnetic or diamagnetic?

Discussion

28.	The best coagulant for the precipitation of Fe(OH)3 sol is
Answer» The best coagulant for the precipitation of $F e (O H)_{3}$ sol is

Discussion

29.	Find the number of bonded and non bonded electrons in water molecule.
Answer» Find the number of bonded and non bonded electrons in water molecule.

Discussion

30.	Calculate the percentage dissociation of H2S(g) if 0.1 mole of H2S is kept in 0.4 litre vessel at 1000 K for the reaction, 2H2S(g)⇌2H2(g)+S2(g) The value of Kc is 1.0×10−6.
Answer» Calculate the percentage dissociation of $H_{2} S (g)$ if $0.1$ mole of $H_{2} S$ is kept in $0.4$ litre vessel at $1000$ K for the reaction, $2 H_{2} S (g) ⇌ 2 H_{2} (g) + S_{2} (g)$ The value of $K_{c}$ is $1.0 \times 10^{- 6}$ .

Discussion

31.	The reagent which does not give acid chloride on reacting with carboxylic acid is
Answer» The reagent which does not give acid chloride on reacting with carboxylic acid is

Discussion

32.	Calculate the sum of lone pairs of electrons in the central atoms of the molecules XeOF4,[XeO6]4− and ClF3.
Answer» Calculate the sum of lone pairs of electrons in the central atoms of the molecules $X e O F_{4}, [X e O_{6}]^{4 -}$ and $C l F_{3}$ .

Discussion

33.	When limestone is heated, quicklime is formed according to the equation. CaCO3(s)⇌CaO(s)+CO2(g) The experiment was carried out in the temperature range 800−900oC, Equilibrium constant Kp follows the relation. log Kp=7.282−8500T where, T is temperature in Kelvin. At what temperature the decomposition will give CO2(g) at 1 atm?
Answer» When limestone is heated, quicklime is formed according to the equation. $C a C O_{3} (s) ⇌ C a O (s) + C O_{2} (g)$ The experiment was carried out in the temperature range $800 - 900^{o} C,$ Equilibrium constant $K_{p}$ follows the relation. $l o g K_{p} = 7.282 - \frac{8500}{T}$ where, T is temperature in Kelvin. At what temperature the decomposition will give $C O_{2} (g)$ at 1 atm?

Discussion

34.	The value of PV for 5.6 litres of an ideal gas at NTP is
Answer» The value of $P V$ for 5.6 litres of an ideal gas at $NTP$ is

Discussion

35.	Among alkali metals which element do you expect to be least electronegative and why?
Answer» Among alkali metals which element do you expect to be least electronegative and why?

Discussion

36.	Which of the following structures contain active methylene group?
Answer» Which of the following structures contain active methylene group?

Discussion

37.	Calculate the number of KClO3 formula units present in 2.5 kilomoles of KClO3.
Answer» Calculate the number of $K C l O_{3}$ formula units present in 2.5 kilomoles of $K C l O_{3}$ .

Discussion

38.	Select the correct order of stability of oxidation states:
Answer» Select the correct order of stability of oxidation states:

Discussion

39.	Calculate the solubility of AgCN in a buffer solution of pH=3.00 assuming no complex formation. Given : Ksp(AgCN)=2.2×10−16, Ka (HCN)=6.2×10−10. (Given √1.33×10−9=3.64×10−5)
Answer» Calculate the solubility of $A g C N$ in a buffer solution of $p H = 3.00$ assuming no complex formation. Given : $K_{s p} (A g C N) = 2.2 \times 10^{- 16}, K_{a} (H C N) = 6.2 \times 10^{- 10}$ . (Given $\sqrt{1.33 \times 10^{- 9}} = 3.64 \times 10^{- 5}$ )

Discussion

40.	Oxygen at 1 atmosphere and 0∘ C has a density of 7.5 g L−1. Find the rms speed of oxygen molecule in ms−1
Answer» Oxygen at 1 atmosphere and $0^{\circ} C$ has a density of $7.5 {g L}^{- 1}$ . Find the rms speed of oxygen molecule in $m s^{- 1}$

Discussion

41.	Which of the following are true regarding CO2 a. Excess of CO2 acts as a pollutant b. Plants take in CO2 for photosynthesis c. Deforestation leads to decrease in the amount of CO2 in air d. Lowering the quantity of CO2 causes rise in temperature
Answer» Which of the following are true regarding $C O_{2}$ a. Excess of $C O_{2}$ acts as a pollutant b. Plants take in $C O_{2}$ for photosynthesis c. Deforestation leads to decrease in the amount of $C O_{2}$ in air d. Lowering the quantity of $C O_{2}$ causes rise in temperature

Discussion

42.	Two moles of an ideal gas is expanded isothermally and reversibly from 1 litre to 10 litre at 300K. The enthalpy change (in KJ) for the process is:
Answer» Two moles of an ideal gas is expanded isothermally and reversibly from 1 litre to 10 litre at 300K. The enthalpy change (in KJ) for the process is:

Discussion

43.	If MOT is for homonuclear atoms then how MOT can describe the CN- and NO structure?
Answer» If MOT is for homonuclear atoms then how MOT can describe the CN- and NO structure?

Discussion

44.	two charges 1uc and 4uc are placed from a distance 2 m aprt in air 3rd charge where should it placed so that the q value of that charge is in equillibrium
Answer» two charges 1uc and 4uc are placed from a distance 2 m aprt in air 3rd charge where should it placed so that the q value of that charge is in equillibrium

Discussion

45.	What is lattice energy
Answer» What is lattice energy

Discussion

46.	number of moles of KMnO4 that is needed to react with one mole of FeC2O4 in acidic medium is- a) 2/5 b)3/5 c)4/5 d)(y-x)
Answer» number of moles of KMnO₄ that is needed to react with one mole of FeC₂O₄in acidic medium is- a) 2/5 b)3/5 c)4/5 d)(y-x)

46.

number of moles of KMnO4 that is needed to react with one mole of FeC2O4 in acidic medium is- a) 2/5 b)3/5 c)4/5 d)(y-x)

Answer»

number of moles of KMnO₄ that is needed to react with one mole of FeC₂O₄in acidic medium is-

a) 2/5 b)3/5 c)4/5 d)(y-x)

Discussion

47.	what are oxo acids?? or more specificaly wahat are acid protons,hydoxyl groups ...explain the definition please
Answer» what are oxo acids?? or more specificaly wahat are acid protons,hydoxyl groups ...explain the definition please

Discussion

48.	The vanderwaals radii of O,N,cl,F and Ne increases in the order ?
Answer» The vanderwaals radii of O,N,cl,F and Ne increases in the order ?

Discussion

49.	We know that for Aromatic Compound the common names are more important but from where I will get those names. If you any websites then send me the link on my E-mail (anmolnpavgmail.com) or simply answer me. In case you yourself have those names then write down them and give me and answer. Please don't send any screen shot.
Answer» We know that for Aromatic Compound the common names are more important but from where I will get those names. If you any websites then send me the link on my E-mail (anmolnpavgmail.com) or simply answer me. In case you yourself have those names then write down them and give me and answer. Please don't send any screen shot.

49.

We know that for Aromatic Compound the common names are more important but from where I will get those names. If you any websites then send me the link on my E-mail (anmolnpavgmail.com) or simply answer me. In case you yourself have those names then write down them and give me and answer. Please don't send any screen shot.

Answer»

We know that for Aromatic Compound the common names are more important but from where I will get those names.

If you any websites then send me the link on my E-mail (anmolnpavgmail.com) or simply answer me.

In case you yourself have those names then write down them and give me and answer.

Please don't send any screen shot.

Discussion

50.	Metallic gold crystallises in a face centered cubic lattice of edge length 4.070 oA. The closest distance between the gold atoms is:
Answer» Metallic gold crystallises in a face centered cubic lattice of edge length $4.070 o A$ . The closest distance between the gold atoms is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Following compounds are given i) CH3CH2OH ii)CH3COCH3 iii) (CH3)2 CHOH iv) CH3OH Which of the above compound/s on being warmed with iodine solution and NaOH will give iodoform?

In the following reaction : H2O2(aq)+Cl2O7(aq)→ClO−2(aq)+O2(g) Moles of OH− and H2O respectively present in a balanced equation in a basic medium are x and y. Calculate the value of x+y:

Which of the following statement is true:

Among CaH2,NH3,NaH and B2H6 which are covalent hydride

Which of the following alkali metal posses higher boiling and melting point?

In a balanced equation H2SO4+xHI→H2S+yI2+zH2O, the values of x,y,z are

The bond order of B2 molecule is:

The shape and geometry of XeF4 are respectively:

1 mole of a gaseous compound C5H10 is completely burnt in excess of O2. The moles of CO2 formed are:

Write the structure of 4-chloropentan-2-one.

Which of the following has maximum boiling point

For the given disproportionation reaction: H3PO2→PH3+H3PO3 The equivalent mass of H3PO2 in grams is : (Given : Atomic mass of P=31 u)

A monochromatic radiation of specific wavelength is incident on H atoms in ground state. H atoms absorb energy and subsequently emit radiations of six different wavelength. Find the wavelength of incident radiation.

Which of the followings is incorrect about photochemical smog –

In what way is the electronic configuration of the transition elements different from that of non-transition elements?

Calculate the mass of residue obtained when CaCO3 is strongly heated and 5.6 L CO2 is produced at STP.

A saturated solution of XCl3 has a vapour pressure of 17.20 mm Hg at 20°C, while pure water vapour pressure is 17.25 mm Hg. Solubility product (Ksp) of XCl3 at 20°C is:

Find out number of correct statements. (A) N2&gt;N (Ist ionization energy) (B) O2&gt;O (Ist ionization energy) (C) H2&gt;H (Ist ionization energy) (D) N+2&gt;N−2 (Stability) (E) H2&gt;H (Ist Electron Affinity) (F) Na2CO3&gt;Li2CO3 (Thermal stability)

Among the following species, which pairs are not isostructural NF3,NO−3,BF3,H3O+,HN3

What is the hybridisation and geometry of BCl3 ?

The structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One-fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is

At what temperature is the rms speed of hydrogen molecules the same as that of oxygen molecules at 1327∘C ?

How many isomeric diaminobenzoic acid can be converted into m-phenylenediamine on decarboxylation ?

Self-condensation of two moles of ethyl acetate in presence of Sodium ethoxide yields:

Is Cis-[Cr(en)2Cl2]Cl paramagnetic or diamagnetic?

The best coagulant for the precipitation of Fe(OH)3 sol is

Find the number of bonded and non bonded electrons in water molecule.

Calculate the percentage dissociation of H2S(g) if 0.1 mole of H2S is kept in 0.4 litre vessel at 1000 K for the reaction, 2H2S(g)⇌2H2(g)+S2(g) The value of Kc is 1.0×10−6.

The reagent which does not give acid chloride on reacting with carboxylic acid is

Calculate the sum of lone pairs of electrons in the central atoms of the molecules XeOF4,[XeO6]4− and ClF3.

The value of PV for 5.6 litres of an ideal gas at NTP is

Among alkali metals which element do you expect to be least electronegative and why?

Which of the following structures contain active methylene group?

Calculate the number of KClO3 formula units present in 2.5 kilomoles of KClO3.

Select the correct order of stability of oxidation states:

Calculate the solubility of AgCN in a buffer solution of pH=3.00 assuming no complex formation. Given : Ksp(AgCN)=2.2×10−16, Ka (HCN)=6.2×10−10. (Given √1.33×10−9=3.64×10−5)

Oxygen at 1 atmosphere and 0∘ C has a density of 7.5 g L−1. Find the rms speed of oxygen molecule in ms−1

Which of the following are true regarding CO2 a. Excess of CO2 acts as a pollutant b. Plants take in CO2 for photosynthesis c. Deforestation leads to decrease in the amount of CO2 in air d. Lowering the quantity of CO2 causes rise in temperature

Two moles of an ideal gas is expanded isothermally and reversibly from 1 litre to 10 litre at 300K. The enthalpy change (in KJ) for the process is:

If MOT is for homonuclear atoms then how MOT can describe the CN- and NO structure?

two charges 1uc and 4uc are placed from a distance 2 m aprt in air 3rd charge where should it placed so that the q value of that charge is in equillibrium

What is lattice energy

number of moles of KMnO4 that is needed to react with one mole of FeC2O4 in acidic medium is- a) 2/5 b)3/5 c)4/5 d)(y-x)

what are oxo acids?? or more specificaly wahat are acid protons,hydoxyl groups ...explain the definition please

The vanderwaals radii of O,N,cl,F and Ne increases in the order ?

Metallic gold crystallises in a face centered cubic lattice of edge length 4.070 oA. The closest distance between the gold atoms is:

Find out number of correct statements. (A) N2>N (Ist ionization energy) (B) O2>O (Ist ionization energy) (C) H2>H (Ist ionization energy) (D) N+2>N−2 (Stability) (E) H2>H (Ist Electron Affinity) (F) Na2CO3>Li2CO3 (Thermal stability)