46295 + Interview Questions in Chemistry

1.	For a spontaneous process
Answer» For a spontaneous process

Discussion

2.	For 1s orbital of Hydrogen atom radial wave function is given as:R(r)=1√π(1a0)3/2e−r/a0 where a0=0.529 A∘)The ratio of radial probability density of finding electron at r=ao to the radial probability density of finding electron at the nucleus is given as (x.e−y). Calculate the value of (x + y)
Answer» For $1 s$ orbital of Hydrogen atom radial wave function is given as: $R (r) = \frac{1}{\sqrt{π}} {(\frac{1}{a_{0}})}^{3 / 2} e^{- r / a_{0}}$ where $a_{0} = 0.529 A \circ)$ The ratio of radial probability density of finding electron at $r = a_{o}$ to the radial probability density of finding electron at the nucleus is given as (x.e $^{- y}$ ). Calculate the value of (x + y)

Discussion

3.	The compound(s) which show tautomerism is/are :
Answer» The compound(s) which show tautomerism is/are :

Discussion

4.	Give R and S configurations of each pairs ofenatiomers of -2-Fluoropropane ,2-Methylbutane , 2-Bromopentane, 3-Methylpentane
Answer» Give R and S configurations of each pairs ofenatiomers of -2-Fluoropropane ,2-Methylbutane , 2-Bromopentane, 3-Methylpentane

Discussion

5.	when the velocity of relativistic charged particle increases , its specific charge
Answer» when the velocity of relativistic charged particle increases , its specific charge

Discussion

6.	Mention the ions which cause temporary and permanent hardness of water
Answer» Mention the ions which cause temporary and permanent hardness of water

Discussion

7.	Which is more stable among 2-methyaniline and 3-methylaniline? Why?
Answer» Which is more stable among 2-methyaniline and 3-methylaniline? Why?

Discussion

8.	Can a capacitor behave like a dipole???
Answer» Can a capacitor behave like a dipole???

Discussion

9.	What is alkoxide?
Answer» What is alkoxide?

Discussion

10.	21. Pentyne + water +(Hg2+ /H+ ) = ________
Answer» 21. Pentyne + water +(Hg2+ /H+ ) = ________

Discussion

11.	Which of the following hydrocarbons is the most reactive towards addition of H2SO4? 1. Ethene 2. Propylene 3. 3- methyl but-1-ene 4. 1- butene
Answer» Which of the following hydrocarbons is the most reactive towards addition of H2SO4? 1. Ethene 2. Propylene 3. 3- methyl but-1-ene 4. 1- butene

Discussion

12.	Which method is used for extraction of Borax?
Answer» Which method is used for extraction of Borax?

Discussion

13.	Which of the following shows a metal being oxidized.
Answer» Which of the following shows a metal being oxidized.

Discussion

14.	Explain the electron dot structure of carbon dioxide which has formula CO2?
Answer» Explain the electron dot structure of carbon dioxide which has formula $C O_{2}$ ?

Discussion

15.	The enthalpy of vaporisation of liquid is 30KJ/mol and entropy of vaporisation is 75J/mol/k. The Boiling point of the liquid at 1 atm is
Answer» The enthalpy of vaporisation of liquid is 30KJ/mol and entropy of vaporisation is 75J/mol/k. The Boiling point of the liquid at 1 atm is

Discussion

16.	For equation C(s)+O2(g)=CO2(g) ∆H=∆U Why?
Answer» For equation C(s)+O2(g)=CO2(g) ∆H=∆U Why?

Discussion

17.	51.What are the drawbacks of collision theory of chemical reactions?
Answer» 51.What are the drawbacks of collision theory of chemical reactions?

Discussion

18.	(i) Write the IUPAC name of the complex [Cr(NH3)4Cl2]Cl. (ii) What type of isomerism is exhibited by the complex [Co(en)3]3+? (en = ethane-1, 2-diamine) (iii) Why is [NiCl4]2− paramagnetic but [Ni(CO)4] is diamagnetic ? (At. nos. : Cr = 24, Co = 27, Ni =28)
Answer» (i) Write the IUPAC name of the complex $[C r (N H_{3})_{4} C l_{2}] C l .$ (ii) What type of isomerism is exhibited by the complex $[C o (e n)_{3}]^{3 +}$ ? (en = ethane-1, 2-diamine) (iii) Why is $[N i C l_{4}]^{2 -}$ paramagnetic but $[N i (C O)_{4}]$ is diamagnetic ? (At. nos. : Cr = 24, Co = 27, Ni =28)

Discussion

19.	Please tell me a trick to memorize the elements in the periodic table.....!!!!!
Answer» Please tell me a trick to memorize the elements in the periodic table.....!!!!!

Discussion

20.	The length of a rectangular notebook is 15 inches and the perimeter is 50 inches. Find the width (in inches).
Answer» The length of a rectangular notebook is 15 inches and the perimeter is 50 inches. Find the width (in inches).

Discussion

21.	Most favourable conditions for electrovalent bonding are:
Answer» Most favourable conditions for electrovalent bonding are:

Discussion

22.	Ozonolysis of the given compound gives
Answer» Ozonolysis of the given compound gives

Discussion

23.	why is the ph of neutral solution 7?explai
Answer» why is the ph of neutral solution 7?explai

Discussion

24.	which sequence of reagent can be used for the conversion of c6h5ch2ch3 to c6h5ch=ch2? give reaso
Answer» which sequence of reagent can be used for the conversion of c6h5ch2ch3 to c6h5ch=ch2? give reaso

Discussion

25.	Out of the following, how many species than can act as both oxidising as well as reducing agent ?1.Na2O32.N2H43.FeSO34.H4P2O65.H2S2O7
Answer» Out of the following, how many species than can act as both oxidising as well as reducing agent ? $\begin{matrix} 1. & N a_{2} O_{3} & 2. & N_{2} H_{4} 3. & F e S O_{3} & 4. & H_{4} P_{2} O_{6} 5. & H_{2} S_{2} O_{7} \end{matrix}$

Discussion

26.	15. Which is more concentrated molarity or molality and why
Answer» 15. Which is more concentrated molarity or molality and why

Discussion

27.	Clay found in a lake at Bhopal contains 15% by mass moisture along with CaCO3 and non volatile SiO2. This on heating loses a part of its moisture, but CaCO3 is completely converted into CaO. The partially dried sample now contains 7.3% moisture and 51.5% SiO2. What is the mass percentage of CaCO3 in the original sample of clay approximately?
Answer» Clay found in a lake at Bhopal contains 15% by mass moisture along with $C a C O_{3}$ and non volatile $S i O_{2}$ . This on heating loses a part of its moisture, but $C a C O_{3}$ is completely converted into CaO. The partially dried sample now contains 7.3% moisture and 51.5% $S i O_{2}$ . What is the mass percentage of $C a C O_{3}$ in the original sample of clay approximately?

Discussion

28.	What is meant by Vacant - d Orbital
Answer» What is meant by Vacant - d Orbital

Discussion

29.	More than One Answer Typeएक से अधिक उत्तर प्रकार के प्रश्नWhich of the following figure/s has/have water image same as original figure?निम्नलिखित में से कौनसे चित्र/चित्रों का जल प्रतिबिम्ब, वास्तविक चित्र के समान है/हैं?
Answer» More than One Answer Type एक से अधिक उत्तर प्रकार के प्रश्न Which of the following figure/s has/have water image same as original figure? निम्नलिखित में से कौनसे चित्र/चित्रों का जल प्रतिबिम्ब, वास्तविक चित्र के समान है/हैं?

Discussion

30.	The oxidation number of Fe in Potassium ferrocyanide is:
Answer» The oxidation number of Fe in Potassium ferrocyanide is:

Discussion

31.	Low spin complex of d6− cation in an octahedral field will have the following energy:(Δ0= crystal feild splitting energy in an octahedral feild, P= Electron pairing energy)
Answer» Low spin complex of $d^{6} -$ cation in an octahedral field will have the following energy: $(Δ_{0} =$ crystal feild splitting energy in an octahedral feild, P= Electron pairing energy $)$

Discussion

32.	(CH3)3CMgCl on reaction with D2O produces :
Answer» (CH₃)₃CMgCl on reaction with D₂O produces :

Discussion

33.	Which of the following is a pair of isotones?
Answer» Which of the following is a pair of isotones?

Discussion

34.	A solid is made up of p and q.if p atoms are present at the corners of unit cell and q atoms at alternate face center,find the formula of solid.
Answer» A solid is made up of p and q.if p atoms are present at the corners of unit cell and q atoms at alternate face center,find the formula of solid.

Discussion

35.	The vapour pressure of H2O is 23.8 mm Hg at 25oC. What is the vapour pressure of a solution of 28.5 g of sucrose, C12H22O11 (Molecular mass= 342 u) in 100 g of H2O?
Answer» The vapour pressure of $H_{2} O$ is $23.8 mm Hg$ at $25^{o} C$ . What is the vapour pressure of a solution of $28.5 g$ of sucrose, $C_{12} H_{22} O_{11} (Molecular mass= 342 u)$ in $100 g$ of $H_{2} O$ ?

Discussion

36.	In an equilateral triangle of side 2a, calculate the sum of circumradius and inradius
Answer» In an equilateral triangle of side 2a, calculate the sum of circumradius and inradius

Discussion

37.	Why is the permanganate ion colored?
Answer» Why is the permanganate ion colored?

Discussion

38.	0.30 g of an organic compound C, H and Oxygen on combustion yields 0.44g CO2 and 0.18 g H2O. If one mole of compound weighs 60, then molecular formula of the compound is
Answer» 0.30 g of an organic compound C, H and Oxygen on combustion yields 0.44g $C O_{2}$ and 0.18 g $H_{2} O$ . If one mole of compound weighs 60, then molecular formula of the compound is

Discussion

39.	Which of the following structures represent the same stereoisomer?
Answer» Which of the following structures represent the same stereoisomer?

Discussion

40.	Is B2 ( di-boron) a paramagnetic or diamagnetic species ? But if we consider the electronicconfiguration, the ninth electron would enter the pi- 2px and pi-2py , orbitals, then why we say that it is diamagnetic ?
Answer» Is B2 ( di-boron) a paramagnetic or diamagnetic species ? But if we consider the electronic configuration, the ninth electron would enter the pi- 2px and pi-2py , orbitals, then why we say that it is diamagnetic ?

Discussion

41.	13. is (COCl6)3- inner or outer orbital complex?
Answer» 13. is (COCl6)3- inner or outer orbital complex?

Discussion

42.	Photoelectric emission is observed from a metal surface with incident frequenciesν1 and ν2 where ν1 > ν2. If the kinetic energies of the photoelectrons emitted in the two cases are in the ratio 2:1, then the threshold frequency νo of the metal is
Answer» Photoelectric emission is observed from a metal surface with incident frequencies $ν_{1} a n d ν_{2}$ where $ν_{1} > ν_{2}$ . If the kinetic energies of the photoelectrons emitted in the two cases are in the ratio $2 : 1$ , then the threshold frequency $ν_{o}$ of the metal is

Discussion

43.	If every object is made up of atoms and atoms are 99 percent empty space then why cantc our any of the body part just pass through the objects?
Answer» If every object is made up of atoms and atoms are 99 percent empty space then why cantc our any of the body part just pass through the objects?

Discussion

44.	Write Lewis dot symbols for atoms of the following elements: Mg, Na, B, O, N, Br.
Answer» Write Lewis dot symbols for atoms of the following elements: Mg, Na, B, O, N, Br.

Discussion

45.	ionisation potential(IP) order N,P,O,
Answer» ionisation potential(IP) order N,P,O,

Discussion

46.	what is the role of iodic acid during iodination of alkanes
Answer» what is the role of iodic acid during iodination of alkanes

Discussion

47.	How much must be a 0.02 M solution of sodium bediluted at 250C in order to double the degree of hydrolysis?
Answer» How much must be a 0.02 M solution of sodium be diluted at 25⁰C in order to double the degree of hydrolysis?

Discussion

48.	23 How Ortho and para positions become the centres for high electron density?
Answer» 23 How Ortho and para positions become the centres for high electron density?

Discussion

49.	D(+) - glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be
Answer» D(+) - glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be

Discussion

50.	(I) Density of 2.05 M solution of acetic acid in water is 0.2 g/ml. Find molality of same solution
Answer» (I) Density of 2.05 M solution of acetic acid in water is 0.2 g/ml. Find molality of same solution

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

For a spontaneous process

The compound(s) which show tautomerism is/are :

Give R and S configurations of each pairs ofenatiomers of -2-Fluoropropane ,2-Methylbutane , 2-Bromopentane, 3-Methylpentane

when the velocity of relativistic charged particle increases , its specific charge

Mention the ions which cause temporary and permanent hardness of water

Which is more stable among 2-methyaniline and 3-methylaniline? Why?

Can a capacitor behave like a dipole???

What is alkoxide?

21. Pentyne + water +(Hg2+ /H+ ) = ________

Which of the following hydrocarbons is the most reactive towards addition of H2SO4? 1. Ethene 2. Propylene 3. 3- methyl but-1-ene 4. 1- butene

Which method is used for extraction of Borax?

Which of the following shows a metal being oxidized.

Explain the electron dot structure of carbon dioxide which has formula CO2?

The enthalpy of vaporisation of liquid is 30KJ/mol and entropy of vaporisation is 75J/mol/k. The Boiling point of the liquid at 1 atm is

For equation C(s)+O2(g)=CO2(g) ∆H=∆U Why?

51.What are the drawbacks of collision theory of chemical reactions?

(i) Write the IUPAC name of the complex [Cr(NH3)4Cl2]Cl. (ii) What type of isomerism is exhibited by the complex [Co(en)3]3+? (en = ethane-1, 2-diamine) (iii) Why is [NiCl4]2− paramagnetic but [Ni(CO)4] is diamagnetic ? (At. nos. : Cr = 24, Co = 27, Ni =28)

Please tell me a trick to memorize the elements in the periodic table.....!!!!!

The length of a rectangular notebook is 15 inches and the perimeter is 50 inches. Find the width (in inches).

Most favourable conditions for electrovalent bonding are:

Ozonolysis of the given compound gives

why is the ph of neutral solution 7?explai

which sequence of reagent can be used for the conversion of c6h5ch2ch3 to c6h5ch=ch2? give reaso

Out of the following, how many species than can act as both oxidising as well as reducing agent ?1.Na2O32.N2H43.FeSO34.H4P2O65.H2S2O7

15. Which is more concentrated molarity or molality and why

What is meant by Vacant - d Orbital

The oxidation number of Fe in Potassium ferrocyanide is:

Low spin complex of d6− cation in an octahedral field will have the following energy:(Δ0= crystal feild splitting energy in an octahedral feild, P= Electron pairing energy)

(CH3)3CMgCl on reaction with D2O produces :

Which of the following is a pair of isotones?

A solid is made up of p and q.if p atoms are present at the corners of unit cell and q atoms at alternate face center,find the formula of solid.

The vapour pressure of H2O is 23.8 mm Hg at 25oC. What is the vapour pressure of a solution of 28.5 g of sucrose, C12H22O11 (Molecular mass= 342 u) in 100 g of H2O?

In an equilateral triangle of side 2a, calculate the sum of circumradius and inradius

Why is the permanganate ion colored?

0.30 g of an organic compound C, H and Oxygen on combustion yields 0.44g CO2 and 0.18 g H2O. If one mole of compound weighs 60, then molecular formula of the compound is

Which of the following structures represent the same stereoisomer?

Is B2 ( di-boron) a paramagnetic or diamagnetic species ? But if we consider the electronicconfiguration, the ninth electron would enter the pi- 2px and pi-2py , orbitals, then why we say that it is diamagnetic ?

13. is (COCl6)3- inner or outer orbital complex?

Photoelectric emission is observed from a metal surface with incident frequenciesν1 and ν2 where ν1 &gt; ν2. If the kinetic energies of the photoelectrons emitted in the two cases are in the ratio 2:1, then the threshold frequency νo of the metal is

If every object is made up of atoms and atoms are 99 percent empty space then why cantc our any of the body part just pass through the objects?

Write Lewis dot symbols for atoms of the following elements: Mg, Na, B, O, N, Br.

ionisation potential(IP) order N,P,O,

what is the role of iodic acid during iodination of alkanes

How much must be a 0.02 M solution of sodium bediluted at 250C in order to double the degree of hydrolysis?

23 How Ortho and para positions become the centres for high electron density?

D(+) - glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be

(I) Density of 2.05 M solution of acetic acid in water is 0.2 g/ml. Find molality of same solution

Photoelectric emission is observed from a metal surface with incident frequenciesν1 and ν2 where ν1 > ν2. If the kinetic energies of the photoelectrons emitted in the two cases are in the ratio 2:1, then the threshold frequency νo of the metal is