46295 + Interview Questions in Chemistry

1.	For an equilibrium rxn involving gases, the forward rxn is 1st order while reverse is second order rxn. the units of K_pare atm atm^2 atm^{-1} atm^-
Answer» For an equilibrium rxn involving gases, the forward rxn is 1st order while reverse is second order rxn. the units of K_pare atm atm^2 atm^{-1} atm^-

Discussion

2.	if costheta= -1/3 and pi
Answer» if costheta= -1/3 and pi

Discussion

3.	Which compound has minimum solubility in water?
Answer» Which compound has minimum solubility in water?

Discussion

4.	An organic compound (A) (molecular formula (C8H16O2) was hydrolysed with dilute sulphuric acid to give a carboxylic acid (B) and alcohol (C). Oxidation of (C) with chromic acid produced (B). (C) on dehydration gives but - 1 - ene. Write equations for the reactions involved.
Answer» An organic compound (A) (molecular formula $(C_{8} H_{1} 6 O_{2})$ was hydrolysed with dilute sulphuric acid to give a carboxylic acid (B) and alcohol (C). Oxidation of (C) with chromic acid produced (B). (C) on dehydration gives but - 1 - ene. Write equations for the reactions involved.

Discussion

5.	An ornament weighing 36g in air, weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9. plz help me understand the answer clearly.
Answer» An ornament weighing 36g in air, weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9. plz help me understand the answer clearly.

5.

An ornament weighing 36g in air, weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9. plz help me understand the answer clearly.

Answer»

An ornament weighing 36g in air, weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9.

plz help me understand the answer clearly.

Discussion

6.	What is the molarity of 4.9%(w/v) H2SO4 solution having density 1.4g/ml??
Answer» What is the molarity of 4.9%(w/v) H2SO4 solution having density 1.4g/ml??

Discussion

7.	1,4butadiamine on heating in presence of hc
Answer» 1,4butadiamine on heating in presence of hc

Discussion

8.	How the find the unit of the rate constant for a:i) zero order reaction/kineticsii) 1st order reaction/kineticsiii) 2nd order reaction/kineticsiv) 3rd order reaction/kineticsv) 4th order reaction/kinetics
Answer» How the find the unit of the rate constant for a: i) zero order reaction/kinetics ii) 1st order reaction/kinetics iii) 2nd order reaction/kinetics iv) 3rd order reaction/kinetics v) 4th order reaction/kinetics

Discussion

9.	Between unsaturated and saturated carbocation which will have greater stability and why?
Answer» Between unsaturated and saturated carbocation which will have greater stability and why?

Discussion

10.	Concentration of CN−1 in 0.1 M HCN is [Ka = 4 ×10−10]
Answer» Concentration of $C N^{- 1}$ in 0.1 M HCN is [Ka = 4 $\times 10^{- 10}$ ]

Discussion

11.	The magnitude of crystal field stabilization energy in octahedral field depends on I : the nature of the ligandII : the charge on the metal ionIII : the size of metal cation
Answer» The magnitude of crystal field stabilization energy in octahedral field depends on I : the nature of the ligand II : the charge on the metal ion III : the size of metal cation

Discussion

12.	12. Balance the equation in basic medium {Al+NO_3^-→ A(OH)_4^-+NH_3
Answer» 12. Balance the equation in basic medium {Al+NO_3^-→ A(OH)_4^-+NH_3

Discussion

13.	The rate of electrophilic addition is fastest in which of the following:
Answer» The rate of electrophilic addition is fastest in which of the following:

Discussion

14.	MCQThe radius of a press cylinder in a hydraulic press is double the diameter of the pump cylinder.Than (1)the mechanical advantage is 16 (2)the work done on the load is equal to the work done on the effort (3)mechanical advantage is 4 (4)Cannot be decided based on the given information
Answer» MCQThe radius of a press cylinder in a hydraulic press is double the diameter of the pump cylinder.Than (1)the mechanical advantage is 16 (2)the work done on the load is equal to the work done on the effort (3)mechanical advantage is 4 (4)Cannot be decided based on the given information

Discussion

15.	What is the reason for order of catenation property of group 15 elements?
Answer» What is the reason for order of catenation property of group 15 elements?

Discussion

16.	Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is ___KCN K2SO4 (NH4)2C2O4 NaCl Zn(NO3)2 FeCl3 K2CO3 NH4NO3 LiCN
Answer» Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is ___ KCN $K_{2} S O_{4}$ $(N H_{4})_{2} C_{2} O_{4}$ $N a C l$ $Z n (N O_{3})_{2}$ $F e C l_{3}$ $K_{2} C O_{3}$ $N H_{4} N O_{3}$ $L i C N$

Discussion

17.	In amines ,the hybridisation state of N is:
Answer» In amines ,the hybridisation state of N is:

Discussion

18.	75.Is the function f(x)=cot x derivable at x=0
Answer» 75.Is the function f(x)=cot x derivable at x=0

Discussion

19.	Which one of the following compounds is most reactive for aromatic electrophilic substitution reaction?
Answer» Which one of the following compounds is most reactive for aromatic electrophilic substitution reaction?

Discussion

20.	Name the common compound that is used in the manufacturing of substances shown in pictures.
Answer» Name the common compound that is used in the manufacturing of substances shown in pictures.

Discussion

21.	in removal of temporary hardness MgHco3 is precipitated as?boiling and clarke's method
Answer» in removal of temporary hardness MgHco3 is precipitated as? boiling and clarke's method

Discussion

22.	43.Which one of the following is not a buffer solution? (1) 0.8M H2S0.8M KHS (2) 2M C&H,NH2 + 2M C6H5NH3+Br (3) 3M H2CO3+ 3M KHCO3 (4) 0.05M KCIO4 + 0.05M HCIO4
Answer» 43.Which one of the following is not a buffer solution? (1) 0.8M H2S0.8M KHS (2) 2M C&H,NH2 + 2M C6H5NH3+Br (3) 3M H2CO3+ 3M KHCO3 (4) 0.05M KCIO4 + 0.05M HCIO4

Discussion

23.	Find out the mole fraction of NaOH in solution, if the mass percent of NaOH in water is 4.7%.
Answer» Find out the mole fraction of $N a O H$ in solution, if the mass percent of $N a O H$ in water is $4.7 %$ .

Discussion

24.	Paracetamol is:
Answer» Paracetamol is:

Discussion

25.	97 Show the reaction mechanism of:- CH3-CH=CH-CHO+HBr Why does Carbocation formation does not take place beside CHO carbon?
Answer» 97 Show the reaction mechanism of:- CH3-CH=CH-CHO+HBr Why does Carbocation formation does not take place beside CHO carbon?

Discussion

26.	What is Azimuthal ?From where it come from?
Answer» What is Azimuthal ?From where it come from?

Discussion

27.	Hydrochloric acid solution A and B have concentration of 0.5 N and 0.1 N respectively. The volum e of solutions A and B required to make 2 litres of 0.2 N HCl will be ?
Answer» Hydrochloric acid solution A and B have concentration of 0.5 N and 0.1 N respectively. The volum e of solutions A and B required to make 2 litres of 0.2 N HCl will be ?

Discussion

28.	Which of the d-orbital lies in the xy plane?
Answer» Which of the d-orbital lies in the xy plane?

Discussion

29.	Abnormal behaviour of fluorine is due to
Answer» Abnormal behaviour of fluorine is due to

Discussion

30.	Which of the following orbitals has two spherical nodes?
Answer» Which of the following orbitals has two spherical nodes?

Discussion

31.	The incorrect statement regarding 15th group hydride EH3. [E=N,P,As,Sb,Bi]
Answer» The incorrect statement regarding $15^{t h}$ group hydride $E H_{3}$ . $[E = N, P, A s, S b, B i]$

Discussion

32.	Calculate number of unpaired electron in o2[AsF6]
Answer» Calculate number of unpaired electron in o2[AsF6]

Discussion

33.	In the following reaction: 3Fe + 4H2O----> Fe3O4 +4H2O, if the atomic weight of iron is 56, then it's equivalent weight will be?
Answer» In the following reaction: 3Fe + 4H2O----> Fe3O4 +4H2O, if the atomic weight of iron is 56, then it's equivalent weight will be?

Discussion

34.	If A and B have 5 and 4 elements respectively, then number of onto functions from A to B is N then equals
Answer» If A and B have 5 and 4 elements respectively, then number of onto functions from A to B is N then equals

Discussion

35.	Thecharacteristic features of solids are [AMU 1994]
Answer» The characteristic features of solids are [AMU 1994]

35.

Thecharacteristic features of solids are [AMU 1994]

Answer»

The
characteristic features of solids are

[AMU 1994]

Discussion

36.	How many types of reactions are possible?
Answer» How many types of reactions are possible?

Discussion

37.	If we synthesize ketone from pent_2-ene from waker method there is possibility of getting more than one type of ketone.how to decide which one is the major product
Answer» If we synthesize ketone from pent_2-ene from waker method there is possibility of getting more than one type of ketone.how to decide which one is the major product

Discussion

38.	what is comman formula of ethanol
Answer» what is comman formula of ethanol

Discussion

39.	The threshold frequency ν0 for a metal is 7.0 × 1014 s−1. Calculate the kinetic energy of an electron emitted when radiation of frequency ν = 1.0 × 1015 s−1
Answer» The threshold frequency $ν_{0}$ for a metal is $7.0 \times 10^{14} s^{- 1}$ . Calculate the kinetic energy of an electron emitted when radiation of frequency $ν$ = $1.0 \times 10^{15} s^{- 1}$

Discussion

40.	What will be the overall n-factor for the given disproportionation reaction:2CuBr(aq)→CuBr2(aq)+Cu(s)
Answer» What will be the overall n-factor for the given disproportionation reaction: $2 C u B r (a q) \to C u B r_{2} (a q) + C u (s)$

Discussion

41.	76 The reaction H2S +H2O2=S+2H2O manifests which nature of H2O2
Answer» 76 The reaction H2S +H2O2=S+2H2O manifests which nature of H2O2

Discussion

42.	Except nitrogen , all the 15 group element is allotropy?
Answer» Except nitrogen , all the 15 group element is allotropy?

Discussion

43.	Choose the incorrect match.Options: CH3 – NucleophileSnF4 – ElectrophileNO2+ – ElectrophileNH4+ – Electrophile
Answer» Choose the incorrect match. Options: CH3 – Nucleophile SnF4 – Electrophile NO2+ – Electrophile NH4+ – Electrophile

Discussion

44.	what happens when copper nitrate undergoes heating
Answer» what happens when copper nitrate undergoes heating

Discussion

45.	At the equilibrium of the reaction : A(g)+2B(s)⇌Cs+2D(s)+E(g), A reacts to the extent of 20% at 400 K and to the extent of 25% at 300K. The equilibrium shifts in forward direction
Answer» At the equilibrium of the reaction : $A_{(g)} + 2 B_{(s)} ⇌ C_{s} + 2 D_{(s)} + E_{(g)},$ A reacts to the extent of 20% at 400 K and to the extent of 25% at 300K. The equilibrium shifts in forward direction

Discussion

46.	Find the number of moles of HNO3 in a sample containing 108 molecules of HNO3.
Answer» Find the number of moles of $H N O_{3}$ in a sample containing $10^{8}$ molecules of $H N O_{3}$ .

Discussion

47.	Acetophenone on reduction with Zn/Hg in the presence of HCl gives
Answer» Acetophenone on reduction with Zn/Hg in the presence of HCl gives

Discussion

48.	50 g of ice at 0∘C is mixed with 50 g of water at 60∘C. Final temperature of mixture will be:
Answer» $50 g$ of ice at $0^{\circ} C$ is mixed with $50 g$ of water at $60^{\circ} C$ . Final temperature of mixture will be:

Discussion

49.	Two liquids X and Y form an ideal solution at 300 K, vapour pressure of the solution containing 1 mole of X and 3 mole of Y is 550 mm Hg. At the same temperature, 1 mole of Y is further added to this solution and the vapour pressure of the solution increases by 10 mm Hg. Vapour pressure (in mm Hg) of X and Y in their pure states will be, respectively:
Answer» Two liquids $X$ and $Y$ form an ideal solution at 300 K, vapour pressure of the solution containing 1 mole of $X$ and 3 mole of $Y$ is 550 mm Hg. At the same temperature, 1 mole of $Y$ is further added to this solution and the vapour pressure of the solution increases by 10 mm Hg. Vapour pressure (in mm Hg) of $X$ and $Y$ in their pure states will be, respectively:

Discussion

50.	In which of the following compounds, is the oxidation number of iodine is fractional
Answer» In which of the following compounds, is the oxidation number of iodine is fractional

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

For an equilibrium rxn involving gases, the forward rxn is 1st order while reverse is second order rxn. the units of K_pare atm atm^2 atm^{-1} atm^-

if costheta= -1/3 and pi

Which compound has minimum solubility in water?

An organic compound (A) (molecular formula (C8H16O2) was hydrolysed with dilute sulphuric acid to give a carboxylic acid (B) and alcohol (C). Oxidation of (C) with chromic acid produced (B). (C) on dehydration gives but - 1 - ene. Write equations for the reactions involved.

An ornament weighing 36g in air, weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9. plz help me understand the answer clearly.

What is the molarity of 4.9%(w/v) H2SO4 solution having density 1.4g/ml??

1,4butadiamine on heating in presence of hc

How the find the unit of the rate constant for a:i) zero order reaction/kineticsii) 1st order reaction/kineticsiii) 2nd order reaction/kineticsiv) 3rd order reaction/kineticsv) 4th order reaction/kinetics

Between unsaturated and saturated carbocation which will have greater stability and why?

Concentration of CN−1 in 0.1 M HCN is [Ka = 4 ×10−10]

The magnitude of crystal field stabilization energy in octahedral field depends on I : the nature of the ligandII : the charge on the metal ionIII : the size of metal cation

12. Balance the equation in basic medium {Al+NO_3^-→ A(OH)_4^-+NH_3

The rate of electrophilic addition is fastest in which of the following:

MCQThe radius of a press cylinder in a hydraulic press is double the diameter of the pump cylinder.Than (1)the mechanical advantage is 16 (2)the work done on the load is equal to the work done on the effort (3)mechanical advantage is 4 (4)Cannot be decided based on the given information

What is the reason for order of catenation property of group 15 elements?

Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is ___KCN K2SO4 (NH4)2C2O4 NaCl Zn(NO3)2 FeCl3 K2CO3 NH4NO3 LiCN

In amines ,the hybridisation state of N is:

75.Is the function f(x)=cot x derivable at x=0

Which one of the following compounds is most reactive for aromatic electrophilic substitution reaction?

Name the common compound that is used in the manufacturing of substances shown in pictures.

in removal of temporary hardness MgHco3 is precipitated as?boiling and clarke's method

43.Which one of the following is not a buffer solution? (1) 0.8M H2S0.8M KHS (2) 2M C&H,NH2 + 2M C6H5NH3+Br (3) 3M H2CO3+ 3M KHCO3 (4) 0.05M KCIO4 + 0.05M HCIO4

Find out the mole fraction of NaOH in solution, if the mass percent of NaOH in water is 4.7%.

Paracetamol is:

97 Show the reaction mechanism of:- CH3-CH=CH-CHO+HBr Why does Carbocation formation does not take place beside CHO carbon?

What is Azimuthal ?From where it come from?

Hydrochloric acid solution A and B have concentration of 0.5 N and 0.1 N respectively. The volum e of solutions A and B required to make 2 litres of 0.2 N HCl will be ?

Which of the d-orbital lies in the xy plane?

Abnormal behaviour of fluorine is due to

Which of the following orbitals has two spherical nodes?

The incorrect statement regarding 15th group hydride EH3. [E=N,P,As,Sb,Bi]

Calculate number of unpaired electron in o2[AsF6]

In the following reaction: 3Fe + 4H2O----> Fe3O4 +4H2O, if the atomic weight of iron is 56, then it's equivalent weight will be?

If A and B have 5 and 4 elements respectively, then number of onto functions from A to B is N then equals

Thecharacteristic features of solids are [AMU 1994]

How many types of reactions are possible?

If we synthesize ketone from pent_2-ene from waker method there is possibility of getting more than one type of ketone.how to decide which one is the major product

what is comman formula of ethanol

The threshold frequency ν0 for a metal is 7.0 × 1014 s−1. Calculate the kinetic energy of an electron emitted when radiation of frequency ν = 1.0 × 1015 s−1

What will be the overall n-factor for the given disproportionation reaction:2CuBr(aq)→CuBr2(aq)+Cu(s)

76 The reaction H2S +H2O2=S+2H2O manifests which nature of H2O2

Except nitrogen , all the 15 group element is allotropy?

Choose the incorrect match.Options: CH3 – NucleophileSnF4 – ElectrophileNO2+ – ElectrophileNH4+ – Electrophile

what happens when copper nitrate undergoes heating

At the equilibrium of the reaction : A(g)+2B(s)⇌Cs+2D(s)+E(g), A reacts to the extent of 20% at 400 K and to the extent of 25% at 300K. The equilibrium shifts in forward direction

Find the number of moles of HNO3 in a sample containing 108 molecules of HNO3.

Acetophenone on reduction with Zn/Hg in the presence of HCl gives

50 g of ice at 0∘C is mixed with 50 g of water at 60∘C. Final temperature of mixture will be:

In which of the following compounds, is the oxidation number of iodine is fractional