46295 + Interview Questions in Chemistry

1.	n-factor of HCl in the given reaction is?2KMnO4 + 16 HCl → 2KCl + 2MnCl2 + 5Cl2 + 8H2O
Answer» n-factor of HCl in the given reaction is? 2KMnO4 + 16 HCl → 2KCl + 2MnCl2 + 5Cl2 + 8H2O

Discussion

2.	For a given exothermic reaction, K1 and K2, are equilibrium constants at temperatures T1, and T2 respectively. Assuming that heat of reaction is constant in temperature range between T1, and T2 it is readily observed that 1 K1>K2 2 K2>K1 3 K1 =K2 4 K1=1/K2
Answer» For a given exothermic reaction, K1 and K2, are equilibrium constants at temperatures T1, and T2 respectively. Assuming that heat of reaction is constant in temperature range between T1, and T2 it is readily observed that 1 K1>K2 2 K2>K1 3 K1 =K2 4 K1=1/K2

Discussion

3.	The correct order of the thermal stability of hydrogen halides (H−X) is
Answer» The correct order of the thermal stability of hydrogen halides $(H - X)$ is

Discussion

4.	How many of the following is a condensation polymer? Polystyrene, Neoprene, PAN, Polyethylene terephthalate
Answer» How many of the following is a condensation polymer? Polystyrene, Neoprene, PAN, Polyethylene terephthalate

Discussion

5.	A hydrogen electrode placed in a solution containing sodium acetate and acetic acid in the concentration ratios of x:y and y:x has electrode potential values E1 and E2 volts, respectively, at 25∘C. The pKa value of acetic acid is:
Answer» A hydrogen electrode placed in a solution containing sodium acetate and acetic acid in the concentration ratios of $x : y$ and $y : x$ has electrode potential values $E_{1}$ and $E_{2}$ volts, respectively, at $25^{\circ} C$ . The $p K_{a}$ value of acetic acid is:

Discussion

6.	Ferromagnetism is in
Answer» Ferromagnetism is in

Discussion

7.	Biodegradable polymer which can be produced from glycine and aminocaproic acid is :
Answer» Biodegradable polymer which can be produced from glycine and aminocaproic acid is :

Discussion

8.	When KMnO4 acts as an oxidising agent and ultimately forms [MnO4]-2, MnO2, Mn2O3, Mn+2 then the number of electrons transferred in each case respectively is
Answer» When KMnO4 acts as an oxidising agent and ultimately forms [MnO4]-2, MnO2, Mn2O3, Mn+2 then the number of electrons transferred in each case respectively is

Discussion

9.	Which property that polyacetelene exhibits is unusual for an organic polymer? (1)Electrical conductivity (2)Flexibility (3)High boiling point (4)Solubility
Answer» Which property that polyacetelene exhibits is unusual for an organic polymer? (1)Electrical conductivity (2)Flexibility (3)High boiling point (4)Solubility

Discussion

10.	Equal weights of ethane and hydrogen are mixed in an empty container at 25oC. The fraction of the total pressure exerted by hydrogen is:
Answer» Equal weights of ethane and hydrogen are mixed in an empty container at $25^{o} C$ . The fraction of the total pressure exerted by hydrogen is:

Discussion

11.	17.Why acidified solution of copper sulphate solution is used in electrolysis of copper instead of basic solutiom?
Answer» 17.Why acidified solution of copper sulphate solution is used in electrolysis of copper instead of basic solutiom?

Discussion

12.	The S.I unit of ionic mobility is
Answer» The S.I unit of ionic mobility is

Discussion

13.	11.The rate constant of a reaction having initial concentration 2.5M Is 6.5*10to the power -2 mol inverse lit inverse second what will be the order of reaction
Answer» 11.The rate constant of a reaction having initial concentration 2.5M Is 6.5*10to the power -2 mol inverse lit inverse second what will be the order of reaction

Discussion

14.	Which one of the following compounds will be most easily attacked by an electrophile?
Answer» Which one of the following compounds will be most easily attacked by an electrophile?

Discussion

15.	The correct order of boiling point is:
Answer» The correct order of boiling point is:

Discussion

16.	31. If temperature is increased then solubility increases/decreases?
Answer» 31. If temperature is increased then solubility increases/decreases?

Discussion

17.	92/200 Aniline and benzene diazonium chloride arechemically distinguished byBro/waterAq. AgNO3Both and H3Po2 (1) and (2)Solutionwhynot H3Po
Answer» 92/200 Aniline and benzene diazonium chloride arechemically distinguished byBro/waterAq. AgNO3Both and H3Po2 (1) and (2)Solutionwhynot H3Po

Discussion

18.	21. How to find isoelectric point without knowing acid dissociation constant(pKa).
Answer» 21. How to find isoelectric point without knowing acid dissociation constant(pKa).

Discussion

19.	52. An aqueous solution containing 288gm of a non-volatile compound having the stoichiometric composition C_nH_{2n}O_n in 90gm of water boils at 101.26degree celcius at 1atm pressure.what is molecular formula of the compound.
Answer» 52. An aqueous solution containing 288gm of a non-volatile compound having the stoichiometric composition C_nH_{2n}O_n in 90gm of water boils at 101.26degree celcius at 1atm pressure.what is molecular formula of the compound.

Discussion

20.	A. Why CRO42 - cannot show disproportionationB. Why sc3+ and ti4+ colourlessC. Stability order in cro3 and mo03
Answer» A. Why CRO42 - cannot show disproportionation B. Why sc3+ and ti4+ colourless C. Stability order in cro3 and mo03

Discussion

21.	A fixed mass m of a gas is subjected to transformation of states from K to L to M to N and back to K as shown in the figure. The succeeding operations that enable this transformation of states are
Answer» A fixed mass m of a gas is subjected to transformation of states from K to L to M to N and back to K as shown in the figure. The succeeding operations that enable this transformation of states are

Discussion

22.	The freezing point depression constant (Kf) of ethanol is 1.99 K kg mol –1. The freezing point depression for the solution of molality 0.075 m containing a non-electrolyte solute in ethanol is:
Answer» The freezing point depression constant $(K_{f})$ of ethanol is $1.99 {K kg mol}^{- 1}$ . The freezing point depression for the solution of molality $0.075 m$ containing a non-electrolyte solute in ethanol is:

Discussion

23.	Explain radioactivity of isotopes.
Answer» Explain radioactivity of isotopes.

Discussion

24.	The element which readily forms an ionic bond has the electronic configuration.
Answer» The element which readily forms an ionic bond has the electronic configuration.

Discussion

25.	Diazonium salt of which of the following will give coloured dye on reaction with β−Naphthol in acidic medium & NaOH:
Answer» Diazonium salt of which of the following will give coloured dye on reaction with $β - Naphthol$ in acidic medium & NaOH:

Discussion

26.	What is radian
Answer» What is radian

Discussion

27.	Write the electronic configuration of Chlorine (Z= 17) and how many electrons are present in p-subshell.
Answer» Write the electronic configuration of Chlorine (Z= 17) and how many electrons are present in p-subshell.

Discussion

28.	The compound that do not act as oxidising agents among the following is/are
Answer» The compound that do not act as oxidising agents among the following is/are

Discussion

29.	1.draw the newman projection of the most stable conformer of ethylene glycol and explain why is it stable?
Answer» 1.draw the newman projection of the most stable conformer of ethylene glycol and explain why is it stable?

Discussion

30.	The number of quanta of radiations of frequency 4.67×1013s−1 that must be absorbed in order to melt 5 g of ice, if the energy required to melt 1 g of ice is 333 J, is:
Answer» The number of quanta of radiations of frequency $4.67 \times 10^{13} s^{- 1}$ that must be absorbed in order to melt 5 g of ice, if the energy required to melt 1 g of ice is 333 J, is:

Discussion

31.	37. Applications of ionisation energy? Any two
Answer» 37. Applications of ionisation energy? Any two

Discussion

32.	In which year law of conservation of mass proposed and implemented?
Answer» In which year law of conservation of mass proposed and implemented?

Discussion

33.	What is a unit cell
Answer» What is a unit cell

Discussion

34.	Name all the metalloids
Answer» Name all the metalloids

Discussion

35.	The sum of molar masses of the products A, B, C and D is ___
Answer» The sum of molar masses of the products A, B, C and D is ___

35.

The sum of molar masses of the products A, B, C and D is ___

Answer»

The sum of molar masses of the products A, B, C and D is

___

Discussion

36.	The freezing point of a solution containing 50 cm3 of ethylene glycol in 50 g of water is found to be -34°C. Assuming ideal behaviour, calculate the density of ethylene glycol in g/cm3 (Kf for water=1.86 K Kg mol−1).
Answer» The freezing point of a solution containing $50 {cm}^{3}$ of ethylene glycol in $50 g$ of water is found to be -34°C. Assuming ideal behaviour, calculate the density of ethylene glycol in ${g/cm}^{3}$ $(K_{f} for water = 1.86 {K Kg mol}^{- 1})$ .

Discussion

37.	Concentrated aq sulphuric acid is 98%H2SO4 by mass &has a density of 1.86gml^-1.Volume of acid required to make one litre of 0.1 M H2SO4 is
Answer» Concentrated aq sulphuric acid is 98%H2SO4 by mass &has a density of 1.86gml^-1.Volume of acid required to make one litre of 0.1 M H2SO4 is

Discussion

38.	A 200.0 g sample of river water contains 6 mg of lead. How many parts per million of lead are in the sample?
Answer» A 200.0 g sample of river water contains 6 mg of lead. How many parts per million of lead are in the sample?

Discussion

39.	Equivalent weight of metal oxide is equal to sum of equivalent weight of metal and oxygen. If E (oxygen) = 8, then what is equivalent weight of metal oxide?
Answer» Equivalent weight of metal oxide is equal to sum of equivalent weight of metal and oxygen. If E (oxygen) = 8, then what is equivalent weight of metal oxide?

Discussion

40.	For the reactionA (g) + 2B (g) C (g) + D (g); Kc=10^12. If the initial no of moles of A,B,C and D are 0.5,1,0.5 and 3.5 moles respectively in a one litre vessel. What is the equilibrium concentratioN for B?(1) 10^-4(2) 2 INTO 10^-4(3) 4 INTO 10^-4(4) 8 INTO 10^-4
Answer» For the reactionA (g) + 2B (g) C (g) + D (g); Kc=10^12. If the initial no of moles of A,B,C and D are 0.5,1,0.5 and 3.5 moles respectively in a one litre vessel. What is the equilibrium concentratioN for B? (1) 10^-4 (2) 2 INTO 10^-4 (3) 4 INTO 10^-4 (4) 8 INTO 10^-4

Discussion

41.

In the acid catalysed hydrolysis of ester the volume of base required at various instant are as follows.Time010 sect∞VNaOH24 mL32 mL40 mLIf hydrolysis follows first order kinetics then find its rate constant (approx).

Answer»

In the acid catalysed hydrolysis of ester the volume of base required at various instant are as follows.

Time	0	10 sec	$t_{\infty}$
$V_{N a O H}$	24 mL	32 mL	40 mL

If hydrolysis follows first order kinetics then find its rate constant (approx).

Discussion

42.	Whyis forH2SO4in water?
Answer» Why is for H₂SO₄ in water?

Discussion

43.	Which of the following compounds is formed by ionic bonding?
Answer» Which of the following compounds is formed by ionic bonding?

Discussion

44.	in a 0.2 molar aq solution of a weak acid HX the degree if ionization is 0.3 the freezing point of the solution will be nearest to
Answer» in a 0.2 molar aq solution of a weak acid HX the degree if ionization is 0.3 the freezing point of the solution will be nearest to

Discussion

45.	When one litre of a saturated solution of PbCl2 (molar mass=278 g mol−1) is evaporated, the residue is found to weight 2.78 g. If Ksp of PbCl2 is y×10−6, then y is:
Answer» When one litre of a saturated solution of $P b C l_{2}$ $({molar mass=278 g mol}^{- 1})$ is evaporated, the residue is found to weight $2.78 g$ . If $K_{s p}$ of $P b C l_{2}$ is $y \times 10^{- 6}$ , then $y$ is:

Discussion

46.	At 300 K and one atmospheric pressure 2 L of N2O4(g) was heated to 600 K at constant pressure. 50% of N2O4(g) got dissociated according to the reaction. N2O4(g)⇌N2(g)+O2(g) Final volume of the mixture in litres is.
Answer» At 300 K and one atmospheric pressure 2 L of $N_{2} O_{4} (g)$ was heated to 600 K at constant pressure. $50 %$ of $N_{2} O_{4} (g)$ got dissociated according to the reaction. $N_{2} O_{4} (g) ⇌ N_{2} (g) + O_{2} (g)$ Final volume of the mixture in litres is.

Discussion

47.	What will be the final product of the given reaction?
Answer» What will be the final product of the given reaction?

Discussion

48.	Kf for water is 1.86∘C kg mol−1. What is the molality of a solution which freezes at −0.192∘C?
Answer» $K_{f}$ for water is ${1.86}^{\circ} C k g m o l^{- 1} .$ What is the molality of a solution which freezes at $- {0.192}^{\circ} C$ ?

Discussion

49.	The central oxygen atom in ether is:
Answer» The central oxygen atom in ether is:

Discussion

50.	Identify Z in the following sequenceCH3CH2Br + KCN gives XX + dil HCL gives ZExplain with mechanism
Answer» Identify Z in the following sequence CH3CH2Br + KCN gives X X + dil HCL gives Z Explain with mechanism

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

n-factor of HCl in the given reaction is?2KMnO4 + 16 HCl → 2KCl + 2MnCl2 + 5Cl2 + 8H2O

For a given exothermic reaction, K1 and K2, are equilibrium constants at temperatures T1, and T2 respectively. Assuming that heat of reaction is constant in temperature range between T1, and T2 it is readily observed that 1 K1>K2 2 K2>K1 3 K1 =K2 4 K1=1/K2

The correct order of the thermal stability of hydrogen halides (H−X) is

How many of the following is a condensation polymer? Polystyrene, Neoprene, PAN, Polyethylene terephthalate

A hydrogen electrode placed in a solution containing sodium acetate and acetic acid in the concentration ratios of x:y and y:x has electrode potential values E1 and E2 volts, respectively, at 25∘C. The pKa value of acetic acid is:

Ferromagnetism is in

Biodegradable polymer which can be produced from glycine and aminocaproic acid is :

When KMnO4 acts as an oxidising agent and ultimately forms [MnO4]-2, MnO2, Mn2O3, Mn+2 then the number of electrons transferred in each case respectively is

Which property that polyacetelene exhibits is unusual for an organic polymer? (1)Electrical conductivity (2)Flexibility (3)High boiling point (4)Solubility

Equal weights of ethane and hydrogen are mixed in an empty container at 25oC. The fraction of the total pressure exerted by hydrogen is:

17.Why acidified solution of copper sulphate solution is used in electrolysis of copper instead of basic solutiom?

The S.I unit of ionic mobility is

11.The rate constant of a reaction having initial concentration 2.5M Is 6.5*10to the power -2 mol inverse lit inverse second what will be the order of reaction

Which one of the following compounds will be most easily attacked by an electrophile?

The correct order of boiling point is:

31. If temperature is increased then solubility increases/decreases?

92/200 Aniline and benzene diazonium chloride arechemically distinguished byBro/waterAq. AgNO3Both and H3Po2 (1) and (2)Solutionwhynot H3Po

21. How to find isoelectric point without knowing acid dissociation constant(pKa).

52. An aqueous solution containing 288gm of a non-volatile compound having the stoichiometric composition C_nH_{2n}O_n in 90gm of water boils at 101.26degree celcius at 1atm pressure.what is molecular formula of the compound.

A. Why CRO42 - cannot show disproportionationB. Why sc3+ and ti4+ colourlessC. Stability order in cro3 and mo03

A fixed mass m of a gas is subjected to transformation of states from K to L to M to N and back to K as shown in the figure. The succeeding operations that enable this transformation of states are

The freezing point depression constant (Kf) of ethanol is 1.99 K kg mol –1. The freezing point depression for the solution of molality 0.075 m containing a non-electrolyte solute in ethanol is:

Explain radioactivity of isotopes.

The element which readily forms an ionic bond has the electronic configuration.

Diazonium salt of which of the following will give coloured dye on reaction with β−Naphthol in acidic medium &amp; NaOH:

What is radian

Write the electronic configuration of Chlorine (Z= 17) and how many electrons are present in p-subshell.

The compound that do not act as oxidising agents among the following is/are

1.draw the newman projection of the most stable conformer of ethylene glycol and explain why is it stable?

The number of quanta of radiations of frequency 4.67×1013s−1 that must be absorbed in order to melt 5 g of ice, if the energy required to melt 1 g of ice is 333 J, is:

37. Applications of ionisation energy? Any two

In which year law of conservation of mass proposed and implemented?

What is a unit cell

Name all the metalloids

The sum of molar masses of the products A, B, C and D is ___

The freezing point of a solution containing 50 cm3 of ethylene glycol in 50 g of water is found to be -34°C. Assuming ideal behaviour, calculate the density of ethylene glycol in g/cm3 (Kf for water=1.86 K Kg mol−1).

Concentrated aq sulphuric acid is 98%H2SO4 by mass &amp;has a density of 1.86gml^-1.Volume of acid required to make one litre of 0.1 M H2SO4 is

A 200.0 g sample of river water contains 6 mg of lead. How many parts per million of lead are in the sample?

Equivalent weight of metal oxide is equal to sum of equivalent weight of metal and oxygen. If E (oxygen) = 8, then what is equivalent weight of metal oxide?

For the reactionA (g) + 2B (g) C (g) + D (g); Kc=10^12. If the initial no of moles of A,B,C and D are 0.5,1,0.5 and 3.5 moles respectively in a one litre vessel. What is the equilibrium concentratioN for B?(1) 10^-4(2) 2 INTO 10^-4(3) 4 INTO 10^-4(4) 8 INTO 10^-4

In the acid catalysed hydrolysis of ester the volume of base required at various instant are as follows.Time010 sect∞VNaOH24 mL32 mL40 mLIf hydrolysis follows first order kinetics then find its rate constant (approx).

Whyis forH2SO4in water?

Which of the following compounds is formed by ionic bonding?

in a 0.2 molar aq solution of a weak acid HX the degree if ionization is 0.3 the freezing point of the solution will be nearest to

When one litre of a saturated solution of PbCl2 (molar mass=278 g mol−1) is evaporated, the residue is found to weight 2.78 g. If Ksp of PbCl2 is y×10−6, then y is:

At 300 K and one atmospheric pressure 2 L of N2O4(g) was heated to 600 K at constant pressure. 50% of N2O4(g) got dissociated according to the reaction. N2O4(g)⇌N2(g)+O2(g) Final volume of the mixture in litres is.

What will be the final product of the given reaction?

Kf for water is 1.86∘C kg mol−1. What is the molality of a solution which freezes at −0.192∘C?

The central oxygen atom in ether is:

Identify Z in the following sequenceCH3CH2Br + KCN gives XX + dil HCL gives ZExplain with mechanism

Diazonium salt of which of the following will give coloured dye on reaction with β−Naphthol in acidic medium & NaOH:

Concentrated aq sulphuric acid is 98%H2SO4 by mass &has a density of 1.86gml^-1.Volume of acid required to make one litre of 0.1 M H2SO4 is