46295 + Interview Questions in Chemistry

1.	What willbe the effect of temperature on rate constant?
Answer» What will be the effect of temperature on rate constant?

Discussion

2.	10gm of impure NaOH is completely neutralised by 1000mL of N/10 HCL.calculate the percentage purity
Answer» 10gm of impure NaOH is completely neutralised by 1000mL of N/10 HCL.calculate the percentage purity

Discussion

3.	12 g of an alkaline earth metal gives 14.8 g of its nitride . Atomic weight of the metal is - a)12 b)20 c)40 d)14.8
Answer» 12 g of an alkaline earth metal gives 14.8 g of its nitride . Atomic weight of the metal is - a)12 b)20 c)40 d)14.8

Discussion

4.	If sp hybridiesd orbitals are more stable than sp^2 and sp^3 hybrid orbitals, then why is ethyne less stable than ethene and ethane?
Answer» If sp hybridiesd orbitals are more stable than sp^2 and sp^3 hybrid orbitals, then why is ethyne less stable than ethene and ethane?

Discussion

5.	Among the following, the ion which will be more effective for flocculation of Fe(OH)3 sol is:
Answer» Among the following, the ion which will be more effective for flocculation of $F e (O H)_{3}$ sol is:

Discussion

6.	estion : 1 Which of the following statements is/are true for a buffer solution? Options: Wrong It is a solution which resists the change in pH at all conditions There are two types of buffer only - Acidic and basic Should have chosen Ammonium acetate (CH3COONH4) acts as buffer All are correct
Answer» estion : 1 Which of the following statements is/are true for a buffer solution? Options: Wrong It is a solution which resists the change in pH at all conditions There are two types of buffer only - Acidic and basic Should have chosen Ammonium acetate (CH3COONH4) acts as buffer All are correct

Discussion

7.	Explain bionamial theory
Answer» Explain bionamial theory

Discussion

8.	Q 14/15 The smallest ketone and its next homologue arereacted with hydroxyl amine to give oxime. Then(1)Two different oximes are formed(2)Three diffrent oximes are formed(3)Only one type of oxime is formed(4) Four different types of oximes are formed
Answer» Q 14/15 The smallest ketone and its next homologue arereacted with hydroxyl amine to give oxime. Then(1)Two different oximes are formed(2)Three diffrent oximes are formed(3)Only one type of oxime is formed(4) Four different types of oximes are formed

Discussion

9.	Which of the following alkali carbonates have high thermal stability?
Answer» Which of the following alkali carbonates have high thermal stability?

Discussion

10.	what is the difference between fused state and molten state and aqueous state
Answer» what is the difference between fused state and molten state and aqueous state

Discussion

11.	The value of equilibrium constant for a feasible cell reactionis:(a) < 1(b) = 1(c) > 1(d) zero
Answer» The value of equilibrium constant for a feasible cell reaction is: (a) < 1 (b) = 1 (c) > 1 (d) zero

Discussion

12.	Factors affecting evaportion
Answer» Factors affecting evaportion

Discussion

13.	4. 8kg metal block of dimension 16cm×8cm×6cm lying on a table with face of largest area touching the table . if g= 10ms2. The minimum amount of work done in make ing it length vertical is?
Answer» 4. 8kg metal block of dimension 16cm×8cm×6cm lying on a table with face of largest area touching the table . if g= 10ms2. The minimum amount of work done in make ing it length vertical is?

Discussion

14.	A solution containing 10gm per liter of urea is isotonic with a 5%solution of a nonvolatile solute is a) 200 g/mol b) 300 g/mol c) 250 g/mol d) 350 g/mol
Answer» A solution containing 10gm per liter of urea is isotonic with a 5%solution of a nonvolatile solute is a) 200 g/mol b) 300 g/mol c) 250 g/mol d) 350 g/mol

Discussion

15.	In the equilibrium CaCO3(s)Cao (s)+CO2(g) at 1073 K, the pressure of CO2 isfound to be 2.5 x 10 Pa. The equilibriumconstant for the reaction at 1073 K will be.(a) 0.25(c)25(b) 2.5(d) 250
Answer» In the equilibrium CaCO3(s)Cao (s)+CO2(g) at 1073 K, the pressure of CO2 isfound to be 2.5 x 10 Pa. The equilibriumconstant for the reaction at 1073 K will be.(a) 0.25(c)25(b) 2.5(d) 250

Discussion

16.	4. When a certain solution of specific conductivity of 1.4 was placed in a conductivity cell with parallel electrode the resistance was found to be 100 ohm if the distance between electrode become twice and area of the electrode reduce to 1/4 time the resistance of the same solution will be
Answer» 4. When a certain solution of specific conductivity of 1.4 was placed in a conductivity cell with parallel electrode the resistance was found to be 100 ohm if the distance between electrode become twice and area of the electrode reduce to 1/4 time the resistance of the same solution will be

Discussion

17.	If S0 for H2, Cl2 and HCL are 0.13, 0.22 and 0.19 kJK-1mol-1 respectively. The total change in standard entropy for th2e reaction, H2+Cl2→2HCl
Answer» If S⁰ for H₂, Cl₂ and HCL are 0.13, 0.22 and 0.19 kJK^-1mol^-1 respectively. The total change in standard entropy for th2e reaction, H₂+Cl₂→2HCl

Discussion

18.	The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting particles but their magnitude depends upon (a) charge of interacting particles (b) mass of interacting particles (c) polarisability of interacting particles (d) strength of permanent dipoles in the particles
Answer» The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting particles but their magnitude depends upon (a) charge of interacting particles (b) mass of interacting particles (c) polarisability of interacting particles (d) strength of permanent dipoles in the particles

18.

The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting particles but their magnitude depends upon (a) charge of interacting particles (b) mass of interacting particles (c) polarisability of interacting particles (d) strength of permanent dipoles in the particles

Answer»

The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting particles but their magnitude depends upon

(a) charge of interacting particles

(b) mass of interacting particles

(c) polarisability of interacting particles

(d) strength of permanent dipoles in the particles

Discussion

19.	The number of resonating structures of chlorobenzene are :
Answer» The number of resonating structures of chlorobenzene are :

Discussion

20.	Order of Migratory aptitude in Baeyer villiger oxidation is :
Answer» Order of Migratory aptitude in Baeyer villiger oxidation is :

Discussion

21.	Using arbitrary energy units we can calculate that 864 arbitrary units (a.u.) are required to transfer an electron in hydrogen atom from the most stable Bohr's orbit to the largest distance from the nucleus.n=∞ ; E=0n=1 ; E=−864 Arbitrary unitsThe energy required to transfer the electron from third Bohr's orbit to the orbit n=∞ will be :
Answer» Using arbitrary energy units we can calculate that $864$ $arbitrary units (a.u.)$ are required to transfer an electron in hydrogen atom from the most stable Bohr's orbit to the largest distance from the nucleus. $n = \infty; E = 0$ $n = 1; E = - 864$ $Arbitrary units$ The energy required to transfer the electron from third Bohr's orbit to the orbit $n = \infty$ will be :

Discussion

22.	The compound which does not form a precipitate with ammonical AgNO3 is:
Answer» The compound which does not form a precipitate with ammonical $A g N O_{3}$ is:

Discussion

23.	Why are ores of noble metals combined with Hg inorder to extract them?
Answer» Why are ores of noble metals combined with Hg inorder to extract them?

Discussion

24.	For water at 25oC,dps/dTs=0.189kPa/K (ps is the saturation pressure in kPa an Ts is the saturation temperature in K) and the specific volume of dry saturated vapour is 43.38m3/kg. Assume that the specific volume of liquid is negligible in comparison with that of vapour. Using the Clausius-Clapeyron equation, an estimate of the enthalpy of evaporation of water at 25oC (in kJ/kg) is 2443.2478
Answer» For water at $25^{o} C, d p_{s} / d T_{s} = 0.189 k P a / K$ ( $p_{s}$ is the saturation pressure in $k P a$ an $T_{s}$ is the saturation temperature in $K$ ) and the specific volume of dry saturated vapour is $43.38 m^{3} / k g$ . Assume that the specific volume of liquid is negligible in comparison with that of vapour. Using the Clausius-Clapeyron equation, an estimate of the enthalpy of evaporation of water at $25^{o} C$ (in $k J / k g$ ) is 2443.2478

Discussion

25.	S.I unit of ebullioscopic constant is :
Answer» S.I unit of ebullioscopic constant is :

Discussion

26.	Any p-orbital can accommodate up to:(a) 4 electrons(b) 2 electrons with parallel spins(c) 6 electrons(d) 2 electrons with opposite spins
Answer» Any p-orbital can accommodate up to:(a) 4 electrons(b) 2 electrons with parallel spins(c) 6 electrons(d) 2 electrons with opposite spins

Discussion

27.	Which of the following molecules represents the order of hybridization sp2,sp2,sp,sp
Answer» Which of the following molecules represents the order of hybridization $s p^{2}, s p^{2}, s p, s p$

Discussion

28.	The major product of the following reaction is:
Answer» The major product of the following reaction is:

Discussion

29.	Which of the following do/does not fall under a single homologous series?
Answer» Which of the following do/does not fall under a single homologous series?

Discussion

30.	12.2 g of benzoic acid (M=122 gmol−1) in 100 g water has an elevation in boiling point of 0.27. Kb=0.54 Kkgmol−1. If polymerisation is a 100 % complete, the number of molecules of benzoic acid in an associated state is:
Answer» 12.2 g of benzoic acid $(M = 122 g m o l^{- 1})$ in 100 g water has an elevation in boiling point of 0.27. $K_{b} = 0.54 K k g m o l^{- 1} .$ If polymerisation is a 100 % complete, the number of molecules of benzoic acid in an associated state is:

Discussion

31.	Haemoglobin contains 0.33% of iron by weight . The molecular weight of haemoglobin is approximately 67200 . The number of iron atoms ( at . wt. of Fe=56) present in one molecule of haemoglobin is
Answer» Haemoglobin contains 0.33% of iron by weight . The molecular weight of haemoglobin is approximately 67200 . The number of iron atoms ( at . wt. of Fe=56) present in one molecule of haemoglobin is

Discussion

32.	How work done is lost during reversible process?
Answer» How work done is lost during reversible process?

Discussion

33.	Why does R3P=O exist but R3N=O does not (R=alkyl group) ?
Answer» Why does $R_{3} P$ =O exist but $R_{3} N$ =O does not (R=alkyl group) ?

Discussion

34.	A bulb of unknown volume V contains a gas at 1 atm pressure.This bulb was connected to another evacuated bulb of volume 0.5 L through a stop cock.When the stop cock was opened ,the pressure at each bulb became 7.58×10⁴ Pa mm while the temperature remained constant. Calculate V in L.
Answer» A bulb of unknown volume V contains a gas at 1 atm pressure.This bulb was connected to another evacuated bulb of volume 0.5 L through a stop cock.When the stop cock was opened ,the pressure at each bulb became 7.58×10⁴ Pa mm while the temperature remained constant. Calculate V in L.

Discussion

35.	Integrate ln(ex)x^xdx from 1 to 2
Answer» Integrate ln(ex)x^xdx from 1 to 2

Discussion

36.	72 The number of waves made by Bohr electron in an orbit of maximum magnetic quantum number +2 A 3 B 4 C 2 D 1
Answer» 72 The number of waves made by Bohr electron in an orbit of maximum magnetic quantum number +2 A 3 B 4 C 2 D 1

Discussion

37.	A certain amount of a metal whose equivalent mass is 28 displaces 0.7 L of H2 at s.t.p from an acid hence mass of the element is
Answer» A certain amount of a metal whose equivalent mass is 28 displaces 0.7 L of H2 at s.t.p from an acid hence mass of the element is

Discussion

38.	When the gas is ideal and process is isothermal, then:
Answer» When the gas is ideal and process is isothermal, then:

Discussion

39.	What would be the the mass of NaOH added to 200ml of a 0.10M HOBr solution to produce a buffer of solution of pH8.3 (K_a of HOBr=2×10^{-9}):- (1)3.67g (2)0.37g (3)0.037g (4)3.07g
Answer» What would be the the mass of NaOH added to 200ml of a 0.10M HOBr solution to produce a buffer of solution of pH8.3 (K_a of HOBr=2×10^{-9}):- (1)3.67g (2)0.37g (3)0.037g (4)3.07g

Discussion

40.	10. The vapour pressure of a solvent decrease by 5.4torr when a non volatile solute is added in the solution mole fraction of solute is 0.2 what would be mole fraction of the solvent if decrease in vapour pressure is 16.2 torr
Answer» 10. The vapour pressure of a solvent decrease by 5.4torr when a non volatile solute is added in the solution mole fraction of solute is 0.2 what would be mole fraction of the solvent if decrease in vapour pressure is 16.2 torr

Discussion

41.	Percentage composition of Cu , Zn , Fe in blue vitriol, white vitriol and green vitriol respectively, are _________
Answer» Percentage composition of Cu , Zn , Fe in blue vitriol, white vitriol and green vitriol respectively, are _________

Discussion

42.	Carbon forms a large number of compounds due to:
Answer» Carbon forms a large number of compounds due to:

Discussion

43.	1.84g of a mixture of CaCO_{3 }and MgCO_3 is strongly heated till no further loss in mass takes place. The residue is found to weigh 0.96g. Calculate the percentage of each component in the mixture
Answer» 1.84g of a mixture of CaCO_{3 }and MgCO_3 is strongly heated till no further loss in mass takes place. The residue is found to weigh 0.96g. Calculate the percentage of each component in the mixture

Discussion

44.	What is the ratio of mole Mg(OH)2 and Al(OH)3 in one litre in their saturated solution? Ksp of Mg(OH)2=4×10−12,Al(OH)3=1×10−33 Give answer by multiplying it with 10−17
Answer» What is the ratio of mole $M g (O H)_{2}$ and $A l (O H)_{3}$ in one litre in their saturated solution? $K_{s p}$ of $M g (O H)_{2} = 4 \times 10^{- 12}, A l (O H)_{3} = 1 \times 10^{- 33}$ Give answer by multiplying it with $10^{- 17}$

Discussion

45.	On heating, a sample of NaClO3, it gets converted to NaCl with a loss of 0.16 g of oxygen. The residue is dissolved in water and precipitated as AgCl. The mass of AgCl (in g) obtained will be :(Given molar mass of AgCl=143.5 g mol−1)
Answer» On heating, a sample of $N a C l O_{3}$ , it gets converted to $N a C l$ with a loss of 0.16 g of oxygen. The residue is dissolved in water and precipitated as $A g C l$ . The mass of $A g C l$ (in g) obtained will be : (Given molar mass of $A g C l = 143.5 g m o l^{- 1}$ )

Discussion

46.	On complete reaction of FeCl3 with oxalic acid in an aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is (Round off to the Nearest Integer)
Answer» On complete reaction of $F e C l_{3}$ with oxalic acid in an aqueous solution containing $K O H$ , resulted in the formation of product A. The secondary valency of $F e$ in the product A is (Round off to the Nearest Integer)

Discussion

47.	The reaction of chloroform with alcoholic KOH and p - toluidine forms
Answer» The reaction of chloroform with alcoholic KOH and p - toluidine forms

Discussion

48.	1.24 gm P is present in 2.2 gm of
Answer» 1.24 gm P is present in 2.2 gm of

Discussion

49.	Difference between specific conductance and equivalent conductance
Answer» Difference between specific conductance and equivalent conductance

Discussion

50.	Question 19.3Write the balanced chemical equation for the following reaction and identify the type of reaction.Ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated H2SO4.
Answer» Question 19.3 Write the balanced chemical equation for the following reaction and identify the type of reaction. Ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated $H_{2} {SO}_{4}$ .

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What willbe the effect of temperature on rate constant?

10gm of impure NaOH is completely neutralised by 1000mL of N/10 HCL.calculate the percentage purity

12 g of an alkaline earth metal gives 14.8 g of its nitride . Atomic weight of the metal is - a)12 b)20 c)40 d)14.8

If sp hybridiesd orbitals are more stable than sp^2 and sp^3 hybrid orbitals, then why is ethyne less stable than ethene and ethane?

Among the following, the ion which will be more effective for flocculation of Fe(OH)3 sol is:

estion : 1 Which of the following statements is/are true for a buffer solution? Options: Wrong It is a solution which resists the change in pH at all conditions There are two types of buffer only - Acidic and basic Should have chosen Ammonium acetate (CH3COONH4) acts as buffer All are correct

Explain bionamial theory

Q 14/15 The smallest ketone and its next homologue arereacted with hydroxyl amine to give oxime. Then(1)Two different oximes are formed(2)Three diffrent oximes are formed(3)Only one type of oxime is formed(4) Four different types of oximes are formed

Which of the following alkali carbonates have high thermal stability?

what is the difference between fused state and molten state and aqueous state

The value of equilibrium constant for a feasible cell reactionis:(a) < 1(b) = 1(c) > 1(d) zero

Factors affecting evaportion

4. 8kg metal block of dimension 16cm×8cm×6cm lying on a table with face of largest area touching the table . if g= 10ms2. The minimum amount of work done in make ing it length vertical is?

A solution containing 10gm per liter of urea is isotonic with a 5%solution of a nonvolatile solute is a) 200 g/mol b) 300 g/mol c) 250 g/mol d) 350 g/mol

In the equilibrium CaCO3(s)Cao (s)+CO2(g) at 1073 K, the pressure of CO2 isfound to be 2.5 x 10 Pa. The equilibriumconstant for the reaction at 1073 K will be.(a) 0.25(c)25(b) 2.5(d) 250

4. When a certain solution of specific conductivity of 1.4 was placed in a conductivity cell with parallel electrode the resistance was found to be 100 ohm if the distance between electrode become twice and area of the electrode reduce to 1/4 time the resistance of the same solution will be

If S0 for H2, Cl2 and HCL are 0.13, 0.22 and 0.19 kJK-1mol-1 respectively. The total change in standard entropy for th2e reaction, H2+Cl2→2HCl

The number of resonating structures of chlorobenzene are :

Order of Migratory aptitude in Baeyer villiger oxidation is :

The compound which does not form a precipitate with ammonical AgNO3 is:

Why are ores of noble metals combined with Hg inorder to extract them?

S.I unit of ebullioscopic constant is :

Any p-orbital can accommodate up to:(a) 4 electrons(b) 2 electrons with parallel spins(c) 6 electrons(d) 2 electrons with opposite spins

Which of the following molecules represents the order of hybridization sp2,sp2,sp,sp

The major product of the following reaction is:

Which of the following do/does not fall under a single homologous series?

12.2 g of benzoic acid (M=122 gmol−1) in 100 g water has an elevation in boiling point of 0.27. Kb=0.54 Kkgmol−1. If polymerisation is a 100 % complete, the number of molecules of benzoic acid in an associated state is:

Haemoglobin contains 0.33% of iron by weight . The molecular weight of haemoglobin is approximately 67200 . The number of iron atoms ( at . wt. of Fe=56) present in one molecule of haemoglobin is

How work done is lost during reversible process?

Why does R3P=O exist but R3N=O does not (R=alkyl group) ?

A bulb of unknown volume V contains a gas at 1 atm pressure.This bulb was connected to another evacuated bulb of volume 0.5 L through a stop cock.When the stop cock was opened ,the pressure at each bulb became 7.58×10⁴ Pa mm while the temperature remained constant. Calculate V in L. ​​​​

Integrate ln(ex)x^xdx from 1 to 2

72 The number of waves made by Bohr electron in an orbit of maximum magnetic quantum number +2 A 3 B 4 C 2 D 1

A certain amount of a metal whose equivalent mass is 28 displaces 0.7 L of H2 at s.t.p from an acid hence mass of the element is

When the gas is ideal and process is isothermal, then:

What would be the the mass of NaOH added to 200ml of a 0.10M HOBr solution to produce a buffer of solution of pH8.3 (K_a of HOBr=2×10^{-9}):- (1)3.67g (2)0.37g (3)0.037g (4)3.07g

10. The vapour pressure of a solvent decrease by 5.4torr when a non volatile solute is added in the solution mole fraction of solute is 0.2 what would be mole fraction of the solvent if decrease in vapour pressure is 16.2 torr

Percentage composition of Cu , Zn , Fe in blue vitriol, white vitriol and green vitriol respectively, are _________

Carbon forms a large number of compounds due to:

1.84g of a mixture of CaCO_{3 }and MgCO_3 is strongly heated till no further loss in mass takes place. The residue is found to weigh 0.96g. Calculate the percentage of each component in the mixture

What is the ratio of mole Mg(OH)2 and Al(OH)3 in one litre in their saturated solution? Ksp of Mg(OH)2=4×10−12,Al(OH)3=1×10−33 Give answer by multiplying it with 10−17

On heating, a sample of NaClO3, it gets converted to NaCl with a loss of 0.16 g of oxygen. The residue is dissolved in water and precipitated as AgCl. The mass of AgCl (in g) obtained will be :(Given molar mass of AgCl=143.5 g mol−1)

On complete reaction of FeCl3 with oxalic acid in an aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is (Round off to the Nearest Integer)

The reaction of chloroform with alcoholic KOH and p - toluidine forms

1.24 gm P is present in 2.2 gm of

Difference between specific conductance and equivalent conductance

Question 19.3Write the balanced chemical equation for the following reaction and identify the type of reaction.Ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated H2SO4.

A bulb of unknown volume V contains a gas at 1 atm pressure.This bulb was connected to another evacuated bulb of volume 0.5 L through a stop cock.When the stop cock was opened ,the pressure at each bulb became 7.58×10⁴ Pa mm while the temperature remained constant. Calculate V in L.