46295 + Interview Questions in Chemistry

1.	The cell constant of a given cell is 0.45 cm−1. The resistance of 0.1 molar K4[Fe(CN)6] solution placed in this cell is measured to be 36.0 Ω . What is the equivalent conductivity of the solution (in S cm2 eqv−1)?
Answer» The cell constant of a given cell is $0.45 c m^{- 1}$ . The resistance of 0.1 molar $K_{4} [F e (C N)_{6}]$ solution placed in this cell is measured to be $36.0 Ω$ . What is the equivalent conductivity of the solution (in $S c m^{2} e q v^{- 1}$ )?

Discussion

2.	Question 5Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas, in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is/are correct?(i) In beakers A and B, an exothermic process has occurred.(ii) In beakers A and B, an endothermic process has occurred.(iii) In beaker C exothermic process has occurred.(iv) In beaker C endothermic process has occurred.(a) (i) only(b) (ii) only(c) (i) and (iv)(d) (ii) and (iii)
Answer» Question 5 Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of $NaOH$ , anhydrous ${CuSO}_{4}$ and $NaCl$ were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas, in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is/are correct? (i) In beakers A and B, an exothermic process has occurred. (ii) In beakers A and B, an endothermic process has occurred. (iii) In beaker C exothermic process has occurred. (iv) In beaker C endothermic process has occurred. (a) (i) only (b) (ii) only (c) (i) and (iv) (d) (ii) and (iii)

Discussion

3.	Which of the following reaction will give diastereomers as the product(s)?
Answer» Which of the following reaction will give diastereomers as the product(s)?

Discussion

4.	does refractive index of water vary if any substance is added to it?
Answer» does refractive index of water vary if any substance is added to it?

Discussion

5.	why the value of pH is upto 14? why can't it be more than 14?
Answer» why the value of pH is upto 14? why can't it be more than 14?

Discussion

6.	Afirst order reaction has a rate constant 1.15 10−3s−1.How long will 5 g of this reactant take to reduce to 3 g?
Answer» A first order reaction has a rate constant 1.15 10⁻³ s⁻¹. How long will 5 g of this reactant take to reduce to 3 g?

Discussion

7.	According to werner's theory coordination number is fixed for a specific metal but Platinum has different coordination number in H2[PtCl6] and Na2[PtCl4].
Answer» According to werner's theory coordination number is fixed for a specific metal but Platinum has different coordination number in H2[PtCl6] and Na2[PtCl4].

Discussion

8.	Lothar Meyer's Curve explanation
Answer» Lothar Meyer's Curve explanation

Discussion

9.	For an ideal heat engine, the temperature of the source is 127∘C. In order to have 60% efficiency the temperature of the sink should be in K (Round off to the Nearest Integer)
Answer» For an ideal heat engine, the temperature of the source is $127^{\circ} C$ . In order to have $60$ % efficiency the temperature of the sink should be in $K$ (Round off to the Nearest Integer)

Discussion

10.	In how many ways can 3 diamond cards can be drawn simul†an eously from a pack of cards
Answer» In how many ways can 3 diamond cards can be drawn simul†an eously from a pack of cards

Discussion

11.	The stable oxidation state of Cr in the presence of a weak field ligand is:
Answer» The stable oxidation state of Cr in the presence of a weak field ligand is:

Discussion

12.	the enthalpy of of combustion of H_2(g) at 298 K to give H_2O IS -298 Kj mol^{-1 }AND bond enthalpies of H-H AND O=O ARE 433 kj mol^{-1} respectively. the bond entalpies of O-H is :△ H_{VAP} OF WATER -42 kj mol^{-1
Answer» the enthalpy of of combustion of H_2(g) at 298 K to give H_2O IS -298 Kj mol^{-1 }AND bond enthalpies of H-H AND O=O ARE 433 kj mol^{-1} respectively. the bond entalpies of O-H is :△ H_{VAP} OF WATER -42 kj mol^{-1

Discussion

13.	Question 3 (b)Synthetic fibres are synthesized from raw materials called ________.
Answer» Question 3 (b) Synthetic fibres are synthesized from raw materials called ________.

Discussion

14.	40.Which is better nucleophile NH2- or OH- in 1.DMF 2.CH3OH. with reasons.
Answer» 40.Which is better nucleophile NH2- or OH- in 1.DMF 2.CH3OH. with reasons.

Discussion

15.	22. By how which will potential of zinc electrode change if solution of znso4 in which it is diluted to 10times at 298k A_decreases by 30ml. B_increases by 30mV C_increases by 60mV. D_decreases by 60mV
Answer» 22. By how which will potential of zinc electrode change if solution of znso4 in which it is diluted to 10times at 298k A_decreases by 30ml. B_increases by 30mV C_increases by 60mV. D_decreases by 60mV

Discussion

16.	for a chemical reaction,2A+2B→ C+D,the order of reaction is one with respect tonA and one with respect to B. the initial rate of reaction is 4×10^{-2}mol/lit/se when 50 percent of reac†an t are converted into product,the rate of reaction aould become
Answer» for a chemical reaction,2A+2B→ C+D,the order of reaction is one with respect tonA and one with respect to B. the initial rate of reaction is 4×10^{-2}mol/lit/se when 50 percent of reac†an t are converted into product,the rate of reaction aould become

Discussion

17.	In cements, generally the increase in strength during a period of 14 days to 28 days is primarily due to
Answer» In cements, generally the increase in strength during a period of 14 days to 28 days is primarily due to

Discussion

18.	40 Which of the following order is correct for Ist I.E.? (1) As > Te (2) Zn >Ga (3) Ca < Ga (4) All are correct
Answer» 40 Which of the following order is correct for Ist I.E.? (1) As > Te (2) Zn >Ga (3) Ca < Ga (4) All are correct

Discussion

19.	Sir/mam, Can you please guide me on how to make effective notes for physics and chemistry which would be useful for school exams as well as for competitive exams.(i am in 11th and my notes were messed up:/)please help!
Answer» Sir/mam, Can you please guide me on how to make effective notes for physics and chemistry which would be useful for school exams as well as for competitive exams.(i am in 11th and my notes were messed up:/)please help!

19.

Sir/mam, Can you please guide me on how to make effective notes for physics and chemistry which would be useful for school exams as well as for competitive exams.(i am in 11th and my notes were messed up:/)please help!

Answer»

Sir/mam,

Can you please guide me on how to make effective notes for physics and chemistry which would be useful for school exams as well as for competitive exams.(i am in 11th and my notes were messed up:/)please help!

Discussion

20.	explain how to convert keto form into enol and vice versa in simple language.
Answer» explain how to convert keto form into enol and vice versa in simple language.

Discussion

21.	What is calye Hamilton theorem
Answer» What is calye Hamilton theorem

Discussion

22.	Which of the following is a sulphide ore of copper?
Answer» Which of the following is a sulphide ore of copper?

Discussion

23.	How to decide whether a compound has multiple bond or not
Answer» How to decide whether a compound has multiple bond or not

Discussion

24.	A small bubble rises from the bottom of a lake, where the temperature and the pressure are 8 ∘C and 6.0 atm respectively, to the water's surface, where the temperature is 25 ∘C and the pressure is 1.0 atm. Calculate the final volume of the bubble if its initial volume was 2 mL.
Answer» A small bubble rises from the bottom of a lake, where the temperature and the pressure are $8^{\circ} C$ and $6.0 a t m$ respectively, to the water's surface, where the temperature is $25^{\circ} C$ and the pressure is $1.0 a t m$ . Calculate the final volume of the bubble if its initial volume was $2 m L$ .

Discussion

25.	In the reaction: The product (E) is: (IIT-JEE, 2015)
Answer» In the reaction: The product (E) is: (IIT-JEE, 2015)

Discussion

26.	Which of the following compounds has shortest B−F bond length?
Answer» Which of the following compounds has shortest $B - F$ bond length?

Discussion

27.	3.A particle of mass m=0.1kg is released from rest from a point A of a wedge of mass M =2.4kg free to slide on a frictionless horizontal plane.the particle slides down the smooth face AB of a wedge.when the velocity of the wedge is 0.2m/s the velocity of the particle in m/s relative to the wedge is
Answer» 3.A particle of mass m=0.1kg is released from rest from a point A of a wedge of mass M =2.4kg free to slide on a frictionless horizontal plane.the particle slides down the smooth face AB of a wedge.when the velocity of the wedge is 0.2m/s the velocity of the particle in m/s relative to the wedge is

Discussion

28.	Which of the following contain(s) the highest number of atoms?
Answer» Which of the following contain(s) the highest number of atoms?

Discussion

29.	Which of the following alkyl group has the maximum hyperconjugation effect and least +I effect?
Answer» Which of the following alkyl group has the maximum hyperconjugation effect and least +I effect?

Discussion

30.	Of the following, the one containing examples of metalloid elements in the periodic table is:
Answer» Of the following, the one containing examples of metalloid elements in the periodic table is:

Discussion

31.	Which of the following is not isoelectronic?
Answer» Which of the following is not isoelectronic?

Discussion

32.	Choose the correct order of acidity.
Answer» Choose the correct order of acidity.

Discussion

33.	Ammonia gas is passed into water, yielding a solution of density 0.93g/cm cube and containing 18.6% NH3 by weight . The mass of NH3 per cc of the solution is ?
Answer» Ammonia gas is passed into water, yielding a solution of density 0.93g/cm cube and containing 18.6% NH3 by weight . The mass of NH3 per cc of the solution is ?

Discussion

34.	50. A is a s-block element and on reaction with nitrogen, it gives an ionic compounda B. Compound C and D is formed when B is react with water. Solution of C becomes milky when carbon dioxide gas is passed through it then in the above sequence of reaction A and D are respectively
Answer» 50. A is a s-block element and on reaction with nitrogen, it gives an ionic compounda B. Compound C and D is formed when B is react with water. Solution of C becomes milky when carbon dioxide gas is passed through it then in the above sequence of reaction A and D are respectively

Discussion

35.	Identify the compound which on reaction with one mole of CH3MgI in dry ether and subsequent hydrolysis can give 2-Methyl-2-propanol. Show the mechanism of the process. What will be the observation if Lucas reagent is added to 2-Methyl-2-propanol? [3]
Answer» Identify the compound which on reaction with one mole of CH3MgI in dry ether and subsequent hydrolysis can give 2-Methyl-2-propanol. Show the mechanism of the process. What will be the observation if Lucas reagent is added to 2-Methyl-2-propanol? [3]

Discussion

36.	450 mL of a strong acid solution of pH = 2.0 is mixed with 550 mL of another acid solution of pH = 3.0. The pH of resultant solution is
Answer» 450 mL of a strong acid solution of pH = 2.0 is mixed with 550 mL of another acid solution of pH = 3.0. The pH of resultant solution is

Discussion

37.	What is the atmospheric pressure at the sea level ?
Answer» What is the atmospheric pressure at the sea level ?

Discussion

38.	How to say if ligand if symmetrical and unsymmetrical
Answer» How to say if ligand if symmetrical and unsymmetrical

Discussion

39.	Assertion :- Esterification involves C–O bond fission of carboxylic acid and O–H bond fission of alcohol. Reason :- Carboxylic acids are stronger acid than alcohol
Answer» Assertion :- Esterification involves C–O bond fission of carboxylic acid and O–H bond fission of alcohol. Reason :- Carboxylic acids are stronger acid than alcohol

Discussion

40.	A steamengine delivers 5.4×108 J of work per minute andservices 3.6 × 109 J of heat per minute from itsboiler. What is the efficiency of the engine? How much heat is wastedper minute?
Answer» A steam engine delivers 5.4×10⁸J of work per minute and services 3.6 × 10⁹J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

Discussion

41.	34. How much farady of electricity is required to extract 36 gm of Al from molten alumina?
Answer» 34. How much farady of electricity is required to extract 36 gm of Al from molten alumina?

Discussion

42.	Predict the product C and D of the given reaction.
Answer» Predict the product C and D of the given reaction.

Discussion

43.	Why is it necessary to remove CO when ammonia is obtained by Haber’s process?
Answer» Why is it necessary to remove CO when ammonia is obtained by Haber’s process?

Discussion

44.	If E0Cu\|Cu+=−0.53 V and E0Cu+\|Cu2+=−0.15 V For given cell, Pt(s)\|H2(g,101325 pascal)\|H2SO4(aq.)\|\|Cu2+(aq., 1M)\|Cu(s) Ecell=0.34V at 298K Then, the molarity of H2SO4(aq.) solution is equal to:
Answer» If $E_{C u \| C u^{+}}^{0} = - 0.53 V$ and $E_{C u^{+} \| C u^{2 +}}^{0} = - 0.15 V$ For given cell, $P t (s) \| H_{2} (g, 101325 p a s c a l) \| H_{2} S O_{4} (a q .) \| \| C u^{2 +} (a q ., 1 M) \| C u (s)$ $E_{c e l l} = 0.34 V a t 298 K$ Then, the molarity of $H_{2} S O_{4} (a q .)$ solution is equal to:

Discussion

45.	12.Among the following outermost configuration of metals , which shows the highest oxidation state 1) 3d3 4s2 2) 3d5 4s1 33d5 4s2 4)3d6 4s2
Answer» 12.Among the following outermost configuration of metals , which shows the highest oxidation state 1) 3d3 4s2 2) 3d5 4s1 33d5 4s2 4)3d6 4s2

Discussion

46.	Split and balance the rxn: CuSCN + KIO3 + HCl -----> CuSO4 + KCl + HCN + ICl + H2O
Answer» Split and balance the rxn: CuSCN + KIO3 + HCl -----> CuSO4 + KCl + HCN + ICl + H2O

46.

Split and balance the rxn: CuSCN + KIO3 + HCl -----> CuSO4 + KCl + HCN + ICl + H2O

Answer»

Split and balance the rxn:

CuSCN + KIO3 + HCl -----> CuSO4 + KCl + HCN + ICl + H2O

Discussion

47.	Calculate the emf of the concentration cell at 298 K.Pt(s)\|H2(g, p1)\|HCl(aq)\|H2(g, p2)\|Pt(s)p1=600 torrp2=400 torrTake:log 32=0.176
Answer» Calculate the emf of the concentration cell at $298 K$ . $P t (s) \| H_{2} (g, p_{1}) \| H C l (a q) \| H_{2} (g, p_{2}) \| P t (s)$ $p_{1} = 600 t o r r p_{2} = 400 t o r r$ Take: $l o g \frac{3}{2} = 0.176$

Discussion

48.	For a given exothermic reaction, Kp and K′p are the equilibrium constants at temperatures T1 and T2 respectively. Assuming that heat of reaction is constant in temperatures range between T1 and T2. It is readily observation that : (Given, T2>T1)
Answer» For a given exothermic reaction, $K_{p}$ and $K_{p}^{'}$ are the equilibrium constants at temperatures $T_{1}$ and $T_{2}$ respectively. Assuming that heat of reaction is constant in temperatures range between $T_{1}$ and $T_{2}$ . It is readily observation that : (Given, $T_{2} > T_{1}$ )

Discussion

49.	a sample of ammonia phosphate contains 3.18moles of hydrogen atoms the no of moles oxygen atoms in the sample
Answer» a sample of ammonia phosphate contains 3.18moles of hydrogen atoms the no of moles oxygen atoms in the sample

Discussion

50.	Which is the stable conformation of the given compound?
Answer» Which is the stable conformation of the given compound?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The cell constant of a given cell is 0.45 cm−1. The resistance of 0.1 molar K4[Fe(CN)6] solution placed in this cell is measured to be 36.0 Ω . What is the equivalent conductivity of the solution (in S cm2 eqv−1)?

Which of the following reaction will give diastereomers as the product(s)?

does refractive index of water vary if any substance is added to it?

why the value of pH is upto 14? why can't it be more than 14?

Afirst order reaction has a rate constant 1.15 10−3s−1.How long will 5 g of this reactant take to reduce to 3 g?

According to werner's theory coordination number is fixed for a specific metal but Platinum has different coordination number in H2[PtCl6] and Na2[PtCl4].

Lothar Meyer's Curve explanation

For an ideal heat engine, the temperature of the source is 127∘C. In order to have 60% efficiency the temperature of the sink should be in K (Round off to the Nearest Integer)

In how many ways can 3 diamond cards can be drawn simul†an eously from a pack of cards

The stable oxidation state of Cr in the presence of a weak field ligand is:

the enthalpy of of combustion of H_2(g) at 298 K to give H_2O IS -298 Kj mol^{-1 }AND bond enthalpies of H-H AND O=O ARE 433 kj mol^{-1} respectively. the bond entalpies of O-H is :△ H_{VAP} OF WATER -42 kj mol^{-1

Question 3 (b)Synthetic fibres are synthesized from raw materials called ________.

40.Which is better nucleophile NH2- or OH- in 1.DMF 2.CH3OH. with reasons.

22. By how which will potential of zinc electrode change if solution of znso4 in which it is diluted to 10times at 298k A_decreases by 30ml. B_increases by 30mV C_increases by 60mV. D_decreases by 60mV

for a chemical reaction,2A+2B→ C+D,the order of reaction is one with respect tonA and one with respect to B. the initial rate of reaction is 4×10^{-2}mol/lit/se when 50 percent of reac†an t are converted into product,the rate of reaction aould become

In cements, generally the increase in strength during a period of 14 days to 28 days is primarily due to

40 Which of the following order is correct for Ist I.E.? (1) As > Te (2) Zn >Ga (3) Ca < Ga (4) All are correct

Sir/mam, Can you please guide me on how to make effective notes for physics and chemistry which would be useful for school exams as well as for competitive exams.(i am in 11th and my notes were messed up:/)please help!

explain how to convert keto form into enol and vice versa in simple language.

What is calye Hamilton theorem

Which of the following is a sulphide ore of copper?

How to decide whether a compound has multiple bond or not

A small bubble rises from the bottom of a lake, where the temperature and the pressure are 8 ∘C and 6.0 atm respectively, to the water's surface, where the temperature is 25 ∘C and the pressure is 1.0 atm. Calculate the final volume of the bubble if its initial volume was 2 mL.

In the reaction: The product (E) is: (IIT-JEE, 2015)

Which of the following compounds has shortest B−F bond length?

3.A particle of mass m=0.1kg is released from rest from a point A of a wedge of mass M =2.4kg free to slide on a frictionless horizontal plane.the particle slides down the smooth face AB of a wedge.when the velocity of the wedge is 0.2m/s the velocity of the particle in m/s relative to the wedge is

Which of the following contain(s) the highest number of atoms?

Which of the following alkyl group has the maximum hyperconjugation effect and least +I effect?

Of the following, the one containing examples of metalloid elements in the periodic table is:

Which of the following is not isoelectronic?

Choose the correct order of acidity.

Ammonia gas is passed into water, yielding a solution of density 0.93g/cm cube and containing 18.6% NH3 by weight . The mass of NH3 per cc of the solution is ?

50. A is a s-block element and on reaction with nitrogen, it gives an ionic compounda B. Compound C and D is formed when B is react with water. Solution of C becomes milky when carbon dioxide gas is passed through it then in the above sequence of reaction A and D are respectively

Identify the compound which on reaction with one mole of CH3MgI in dry ether and subsequent hydrolysis can give 2-Methyl-2-propanol. Show the mechanism of the process. What will be the observation if Lucas reagent is added to 2-Methyl-2-propanol? [3]

450 mL of a strong acid solution of pH = 2.0 is mixed with 550 mL of another acid solution of pH = 3.0. The pH of resultant solution is

What is the atmospheric pressure at the sea level ?

How to say if ligand if symmetrical and unsymmetrical

Assertion :- Esterification involves C–O bond fission of carboxylic acid and O–H bond fission of alcohol. Reason :- Carboxylic acids are stronger acid than alcohol

A steamengine delivers 5.4×108 J of work per minute andservices 3.6 × 109 J of heat per minute from itsboiler. What is the efficiency of the engine? How much heat is wastedper minute?

34. How much farady of electricity is required to extract 36 gm of Al from molten alumina?

Predict the product C and D of the given reaction.

Why is it necessary to remove CO when ammonia is obtained by Haber’s process?

If E0Cu|Cu+=−0.53 V and E0Cu+|Cu2+=−0.15 V For given cell, Pt(s)|H2(g,101325 pascal)|H2SO4(aq.)||Cu2+(aq., 1M)|Cu(s) Ecell=0.34V at 298K Then, the molarity of H2SO4(aq.) solution is equal to:

12.Among the following outermost configuration of metals , which shows the highest oxidation state 1) 3d3 4s2 2) 3d5 4s1 33d5 4s2 4)3d6 4s2

Split and balance the rxn: CuSCN + KIO3 + HCl -----&gt; CuSO4 + KCl + HCN + ICl + H2O

Calculate the emf of the concentration cell at 298 K.Pt(s)|H2(g, p1)|HCl(aq)|H2(g, p2)|Pt(s)p1=600 torrp2=400 torrTake:log 32=0.176

For a given exothermic reaction, Kp and K′p are the equilibrium constants at temperatures T1 and T2 respectively. Assuming that heat of reaction is constant in temperatures range between T1 and T2. It is readily observation that : (Given, T2&gt;T1)

a sample of ammonia phosphate contains 3.18moles of hydrogen atoms the no of moles oxygen atoms in the sample

Which is the stable conformation of the given compound?

Split and balance the rxn: CuSCN + KIO3 + HCl -----> CuSO4 + KCl + HCN + ICl + H2O

For a given exothermic reaction, Kp and K′p are the equilibrium constants at temperatures T1 and T2 respectively. Assuming that heat of reaction is constant in temperatures range between T1 and T2. It is readily observation that : (Given, T2>T1)