46295 + Interview Questions in Chemistry

1.	Which combination cannot be used for thepreparation of hydrogen gas in the laboratory? I.Zn/conc.H2SO4(Impure Zinc is used) II.Zn/dil.HNO3 (Impure Zinc is used) III.Zn/dil.H2SO4 (Very highly pure Zn is used)
Answer» Which combination cannot be used for thepreparation of hydrogen gas in the laboratory? I.Zn/conc.H $_{2}$ SO $_{4}$ (Impure Zinc is used) II.Zn/dil.HNO $_{3}$ (Impure Zinc is used) III.Zn/dil.H $_{2}$ SO $_{4}$ (Very highly pure Zn is used)

1.

Which combination cannot be used for thepreparation of hydrogen gas in the laboratory? I.Zn/conc.H2SO4(Impure Zinc is used) II.Zn/dil.HNO3 (Impure Zinc is used) III.Zn/dil.H2SO4 (Very highly pure Zn is used)

Answer»

Which combination cannot be used for thepreparation of hydrogen gas in the
laboratory?

I.Zn/conc.H $_{2}$ SO $_{4}$ (Impure Zinc is used)

II.Zn/dil.HNO $_{3}$ (Impure Zinc is used)

III.Zn/dil.H $_{2}$ SO $_{4}$ (Very highly pure Zn is used)

2.	What is the difference between non aromaticity,aromaticity and antiaromaticity
Answer» What is the difference between non aromaticity,aromaticity and antiaromaticity

Discussion

3.	The maximum number of molecules is present in a.15L of H2 gas at STP b. 5L of of N2 gas at STP c.0.5g of H2 gas d.10g of O2 gas
Answer» The maximum number of molecules is present in a.15L of H₂gas at STP b. 5L of of N₂gas at STP c.0.5g of H₂ gas d.10g of O₂ gas

3.

The maximum number of molecules is present in a.15L of H2 gas at STP b. 5L of of N2 gas at STP c.0.5g of H2 gas d.10g of O2 gas

Answer»

The maximum number of molecules is present in

a.15L of H₂gas at STP

b. 5L of of N₂gas at STP

c.0.5g of H₂ gas

d.10g of O₂ gas

Discussion

4.	Explain de Broglie wave theory
Answer» Explain de Broglie wave theory

Discussion

5.	What is vant Hoff factor of baryta water
Answer» What is vant Hoff factor of baryta water

Discussion

6.	Where P represent major product.Find P
Answer» Where P represent major product.Find P

Discussion

7.	CH3−CHCl−CH2−CH3 has a chiral centre. Which one of the following represents its R configuration?
Answer» $C H_{3} - C H C l - C H_{2} - C H_{3}$ has a chiral centre. Which one of the following represents its R configuration?

Discussion

8.	What is the medicinal use of narcotic drugs?
Answer» What is the medicinal use of narcotic drugs?

Discussion

9.	the concentration of sulphide ion in 0.1 molar HCL solution saturated with hydrogen sulphide is 1 into 10 to the power minus 19 molar if 10 ml of this is added to 5 ml of 0.04 molar solution of the following feso4 mncl2 zncl2 cdcl2 in which of the solution precipitation will takes place
Answer» the concentration of sulphide ion in 0.1 molar HCL solution saturated with hydrogen sulphide is 1 into 10 to the power minus 19 molar if 10 ml of this is added to 5 ml of 0.04 molar solution of the following feso4 mncl2 zncl2 cdcl2 in which of the solution precipitation will takes place

Discussion

10.	what is meant by tollens reagent
Answer» what is meant by tollens reagent

Discussion

11.	A solution of (+)-2-chloro-2-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to formation of
Answer» A solution of (+)-2-chloro-2-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to formation of

Discussion

12.	Ph−CH2−CH2−CH2−OH PCC−−→
Answer» $Ph - {CH}_{2} - {CH}_{2} - {CH}_{2} - OH PCC - - \to$

Discussion

13.	Which of the following salts form the most basic aqueous solution?
Answer» Which of the following salts form the most basic aqueous solution?

Discussion

14.	The specific heat of water Sw=4200Jkg−1K−1 and the latent heat of ice Lf=3.4×105 Jkg−1K−1. 100 grams of ice at 0∘ is placed in 200 g of water at 0∘. The amount of ice that will melt as the temperature of water reaches 0∘ is close to (in g)
Answer» The specific heat of water $S_{w} = 4200$ ${Jkg}^{- 1} K^{- 1}$ and the latent heat of ice $L_{f} = 3.4 \times 10^{5} {Jkg}^{- 1} K^{- 1} .$ $100$ grams of ice at $0^{\circ}$ is placed in $200 g$ of water at $0^{\circ} .$ The amount of ice that will melt as the temperature of water reaches $0^{\circ}$ is close to (in $g$ )

Discussion

15.	How does PCl5 exist in its solid state?
Answer» How does $P C l_{5}$ exist in its solid state?

Discussion

16.	62. The no of moles of N atom in 56g N gas is
Answer» 62. The no of moles of N atom in 56g N gas is

Discussion

17.	What is the half life period of a radioactive substance if 87.5% of any given amount of the substance disintegrates in 40 minutes?
Answer» What is the half life period of a radioactive substance if 87.5 $%$ of any given amount of the substance disintegrates in 40 minutes?

Discussion

18.	How many stereoisomers are there for the octahedral complex pt(nh3) 2(no2) 2cl2?
Answer» How many stereoisomers are there for the octahedral complex pt(nh3) 2(no2) 2cl2?

Discussion

19.	15 Which has greater atomic radius and why? N or S
Answer» 15 Which has greater atomic radius and why? N or S

Discussion

20.	if x gram of a metal sulphate on heating gives y gram metal oxide ,then relation between x,y,equivalent mass
Answer» if x gram of a metal sulphate on heating gives y gram metal oxide ,then relation between x,y,equivalent mass

Discussion

21.	20 ml of 0.2m al2(so4)3 is mixed with 20 ml 6.6m bacl2 the concentraton of cl ion in solution is
Answer» 20 ml of 0.2m al2(so4)3 is mixed with 20 ml 6.6m bacl2 the concentraton of cl ion in solution is

Discussion

22.	At 80∘C the vapour pressure of pure liquid ‘A’ is 520 mm of Hg and that of pure liq ‘B’ is 1000 mm of Hg. If the mixture of both liquids from an ideal solution and boils at 80∘C and 1 atm pressure, the mole fraction of ‘A’ in the liquid mixture is:
Answer» At $80^{\circ}$ C the vapour pressure of pure liquid ‘A’ is 520 mm of Hg and that of pure liq ‘B’ is 1000 mm of Hg. If the mixture of both liquids from an ideal solution and boils at $80^{\circ}$ C and 1 atm pressure, the mole fraction of ‘A’ in the liquid mixture is:

Discussion

23.	What volume of o2 measured at 1 ATM and 273 k will be formed by action of100ml of 0.5 N kmno4 on hydrogen peroxide in an acid solution.The skeletal equation is: Kmno4+h2so4+h2o2=k2so4+ MnSo4 +o2+ h2o
Answer» What volume of o2 measured at 1 ATM and 273 k will be formed by action of100ml of 0.5 N kmno4 on hydrogen peroxide in an acid solution.The skeletal equation is: Kmno4+h2so4+h2o2=k2so4+ MnSo4 +o2+ h2o

Discussion

24.	How many degrees of freedom does a triatomic molecule like CO2 has ?
Answer» How many degrees of freedom does a triatomic molecule like CO2 has ?

Discussion

25.	Which of the following compounds is a peroxide?
Answer» Which of the following compounds is a peroxide?

Discussion

26.	Sterioisomers differ in
Answer» Sterioisomers differ in

Discussion

27.	what are dimensions?
Answer» what are dimensions?

Discussion

28.	The charge to mass ratio of electron was found to be? How to solve this?
Answer» The charge to mass ratio of electron was found to be? How to solve this?

Discussion

29.	Amongst the elements of group 17, fluorine is most reactive owing to it's:
Answer» Amongst the elements of group 17, fluorine is most reactive owing to it's:

Discussion

30.	For a tetrahedral void the correct relation between r and R is :Herer is radius of the tetrahedral voidR is radius of the atoms in close packing
Answer» For a tetrahedral void the correct relation between r and R is : Here $r is radius of the tetrahedral void$ $R is radius of the atoms in close packing$

Discussion

31.	find the total number of enantiomers of \lbrack M(en)_2a_2\rbrack where M repesents central metal atom and en represents etgylene 1,2 diammine and a is a monodentate ligand.
Answer» find the total number of enantiomers of \lbrack M(en)_2a_2\rbrack where M repesents central metal atom and en represents etgylene 1,2 diammine and a is a monodentate ligand.

Discussion

32.	Is melamine and bakelite is not a polymer?
Answer» Is melamine and bakelite is not a polymer?

Discussion

33.	Choose the correct statement regarding the van der waals' equation when one mole of a has is kept at high temperature and low pressure:
Answer» Choose the correct statement regarding the van der waals' equation when one mole of a has is kept at high temperature and low pressure:

Discussion

34.	27. 2.5g of a substance is present in 200ml of solution showing the osmotic pressure of 60cm Hg at 15'C. Calculate the molecular weight of substance. What will be the osmotic pressure if temperature is raised to 25'C.
Answer» 27. 2.5g of a substance is present in 200ml of solution showing the osmotic pressure of 60cm Hg at 15'C. Calculate the molecular weight of substance. What will be the osmotic pressure if temperature is raised to 25'C.

Discussion

35.	what is Xa and Xb in relation between mole fraction and molality
Answer» what is Xa and Xb in relation between mole fraction and molality

Discussion

36.	+86. The formation constant of Ni(NH3)6- is 6 ×10^8 at 25^° C. If 50 ml of 2.0 M NH_3, is added to 50 ml of 0.20M solution of Ni^{2+}, the concentration of Ni2+ ion will benearly equal to(a) 3 10-1"mol L-1 (b) 2 10-10 mol L-1e) 2 x 10-9 mo! L-1 (d) 4 10-mol L-1
Answer» +86. The formation constant of Ni(NH3)6- is 6 ×10^8 at 25^° C. If 50 ml of 2.0 M NH_3, is added to 50 ml of 0.20M solution of Ni^{2+}, the concentration of Ni2+ ion will benearly equal to(a) 3 10-1"mol L-1 (b) 2 10-10 mol L-1e) 2 x 10-9 mo! L-1 (d) 4 10-mol L-1

Discussion

37.	In an interference pattern, ImaxImin=4, then A1A2 is
Answer» In an interference pattern, $\frac{I_{m a x}}{I_{m i n}} = 4$ , then $\frac{A_{1}}{A_{2}}$ is

Discussion

38.	Which one of the following compounds cannot be made from bromoethane in a single reaction?
Answer» Which one of the following compounds cannot be made from bromoethane in a single reaction?

Discussion

39.	Is N2O5 planar or nonplanar structure.
Answer» Is N2O5 planar or nonplanar structure.

Discussion

40.	Q. Will copper with concentrated HCL produce hydrogen gas ?
Answer» Q. Will copper with concentrated HCL produce hydrogen gas ?

Discussion

41.	In the Nitrogen family the H - M - H bond angle in the hydrides MH3 gradually becomes closer to 90∘ on going from N to Sb. This shows that gradually:
Answer» In the Nitrogen family the H - M - H bond angle in the hydrides $M H_{3}$ gradually becomes closer to $90^{\circ}$ on going from N to Sb. This shows that gradually:

Discussion

42.	which of the following does not react with bromine a. etheyl amine b.propane c.phenol d.cholorophor
Answer» which of the following does not react with bromine a. etheyl amine b.propane c.phenol d.cholorophor

Discussion

43.	The dissociation constant of two acids HA1 and HA2 are 3.14 × 10−4 and 1.96 × 10−5 respectively. The relative strength of the acids will be approximately
Answer» The dissociation constant of two acids $H A_{1}$ and $H A_{2}$ are $3.14 \times 10^{- 4}$ and $1.96 \times 10^{- 5}$ respectively. The relative strength of the acids will be approximately

Discussion

44.	Select the complexes that are paramagnetic in nature.
Answer» Select the complexes that are paramagnetic in nature.

Discussion

45.	why are alkyldiazonium salts unstable?
Answer» why are alkyldiazonium salts unstable?

Discussion

46.	in a zero order reaction 20% of the reaction is complete in 10s .how much time it will take to complete 50% of the reactio
Answer» in a zero order reaction 20% of the reaction is complete in 10s .how much time it will take to complete 50% of the reactio

Discussion

47.	Give two reasons to justify that:Water is a liquid at room temperature.
Answer» Give two reasons to justify that: Water is a liquid at room temperature.

Discussion

48.	Why is hydroxide oh and not ho
Answer» Why is hydroxide oh and not ho

Discussion

49.	The osmotic pressure of a solution of an organic substance containing 18 g in one litre of solution at 300 K is 2.7×105 Pa .Find the molecular mass of the substance.Take R=8.3 J mol−1 K−1
Answer» The osmotic pressure of a solution of an organic substance containing $18 g$ in one litre of solution at $300 K$ is $2.7 \times 10^{5} P a$ .Find the molecular mass of the substance. Take $R = 8.3 J m o l^{- 1} K^{- 1}$

Discussion

50.	What mass of chalk containing 60% CaCO3would be required for obtaining 200 litres of CO2 at NTP.
Answer» What mass of chalk containing 60% CaCO3would be required for obtaining 200 litres of CO2 at NTP.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which combination cannot be used for thepreparation of hydrogen gas in the laboratory? I.Zn/conc.H2SO4(Impure Zinc is used) II.Zn/dil.HNO3 (Impure Zinc is used) III.Zn/dil.H2SO4 (Very highly pure Zn is used)

What is the difference between non aromaticity,aromaticity and antiaromaticity

The maximum number of molecules is present in a.15L of H​​​​​​2 gas at STP b. 5L of of N​​​​​​2 gas at STP c.0.5g of H​​​​​​2 gas d.10g of O​​​​​​2 gas

Explain de Broglie wave theory

What is vant Hoff factor of baryta water

Where P represent major product.Find P

CH3−CHCl−CH2−CH3 has a chiral centre. Which one of the following represents its R configuration?

What is the medicinal use of narcotic drugs?

the concentration of sulphide ion in 0.1 molar HCL solution saturated with hydrogen sulphide is 1 into 10 to the power minus 19 molar if 10 ml of this is added to 5 ml of 0.04 molar solution of the following feso4 mncl2 zncl2 cdcl2 in which of the solution precipitation will takes place

what is meant by tollens reagent

A solution of (+)-2-chloro-2-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to formation of

Ph−CH2−CH2−CH2−OH PCC−−→

Which of the following salts form the most basic aqueous solution?

The specific heat of water Sw=4200Jkg−1K−1 and the latent heat of ice Lf=3.4×105 Jkg−1K−1. 100 grams of ice at 0∘ is placed in 200 g of water at 0∘. The amount of ice that will melt as the temperature of water reaches 0∘ is close to (in g)

How does PCl5 exist in its solid state?

62. The no of moles of N atom in 56g N gas is

What is the half life period of a radioactive substance if 87.5% of any given amount of the substance disintegrates in 40 minutes?

How many stereoisomers are there for the octahedral complex pt(nh3) 2(no2) 2cl2?

15 Which has greater atomic radius and why? N or S

if x gram of a metal sulphate on heating gives y gram metal oxide ,then relation between x,y,equivalent mass

20 ml of 0.2m al2(so4)3 is mixed with 20 ml 6.6m bacl2 the concentraton of cl ion in solution is

At 80∘C the vapour pressure of pure liquid ‘A’ is 520 mm of Hg and that of pure liq ‘B’ is 1000 mm of Hg. If the mixture of both liquids from an ideal solution and boils at 80∘C and 1 atm pressure, the mole fraction of ‘A’ in the liquid mixture is:

What volume of o2 measured at 1 ATM and 273 k will be formed by action of100ml of 0.5 N kmno4 on hydrogen peroxide in an acid solution.The skeletal equation is: Kmno4+h2so4+h2o2=k2so4+ MnSo4 +o2+ h2o

How many degrees of freedom does a triatomic molecule like CO2 has ?

Which of the following compounds is a peroxide?

Sterioisomers differ in

what are dimensions?

The charge to mass ratio of electron was found to be? How to solve this?

Amongst the elements of group 17, fluorine is most reactive owing to it's:

For a tetrahedral void the correct relation between r and R is :Herer is radius of the tetrahedral voidR is radius of the atoms in close packing

find the total number of enantiomers of \lbrack M(en)_2a_2\rbrack where M repesents central metal atom and en represents etgylene 1,2 diammine and a is a monodentate ligand.

Is melamine and bakelite is not a polymer?

Choose the correct statement regarding the van der waals' equation when one mole of a has is kept at high temperature and low pressure:

27. 2.5g of a substance is present in 200ml of solution showing the osmotic pressure of 60cm Hg at 15'C. Calculate the molecular weight of substance. What will be the osmotic pressure if temperature is raised to 25'C.

what is Xa and Xb in relation between mole fraction and molality

+86. The formation constant of Ni(NH3)6- is 6 ×10^8 at 25^° C. If 50 ml of 2.0 M NH_3, is added to 50 ml of 0.20M solution of Ni^{2+}, the concentration of Ni2+ ion will benearly equal to(a) 3 10-1"mol L-1 (b) 2 10-10 mol L-1e) 2 x 10-9 mo! L-1 (d) 4 10-mol L-1

In an interference pattern, ImaxImin=4, then A1A2 is

Which one of the following compounds cannot be made from bromoethane in a single reaction?

Is N2O5 planar or nonplanar structure.

Q. Will copper with concentrated HCL produce hydrogen gas ?

In the Nitrogen family the H - M - H bond angle in the hydrides MH3 gradually becomes closer to 90∘ on going from N to Sb. This shows that gradually:

which of the following does not react with bromine a. etheyl amine b.propane c.phenol d.cholorophor

The dissociation constant of two acids HA1 and HA2 are 3.14 × 10−4 and 1.96 × 10−5 respectively. The relative strength of the acids will be approximately

Select the complexes that are paramagnetic in nature.

why are alkyldiazonium salts unstable?

in a zero order reaction 20% of the reaction is complete in 10s .how much time it will take to complete 50% of the reactio

Give two reasons to justify that:Water is a liquid at room temperature.

Why is hydroxide oh and not ho

The osmotic pressure of a solution of an organic substance containing 18 g in one litre of solution at 300 K is 2.7×105 Pa .Find the molecular mass of the substance.Take R=8.3 J mol−1 K−1

What mass of chalk containing 60% CaCO3would be required for obtaining 200 litres of CO2 at NTP.

The maximum number of molecules is present in a.15L of H2 gas at STP b. 5L of of N2 gas at STP c.0.5g of H2 gas d.10g of O2 gas