46295 + Interview Questions in Chemistry

1.	A given Quantity of a gas is at a pressure p and Absolute Temperature T . The isothermal bulk modulus of the gas is. 2p/3 P 3p/2 2p
Answer» A given Quantity of a gas is at a pressure p and Absolute Temperature T . The isothermal bulk modulus of the gas is. 2p/3 P 3p/2 2p

Discussion

2.	which of the following salts will undergo hydrolysis and makes water alkaline (1) kcl (2) nacl (3) kno3 (4)nacn
Answer» which of the following salts will undergo hydrolysis and makes water alkaline (1) kcl (2) nacl (3) kno3 (4)nacn

Discussion

3.	Calculate the minimum and maximum number of electrons which may have magnetic quantum number, m=+1 and spin quantum number, s=−12 in chromium (Cr)
Answer» Calculate the minimum and maximum number of electrons which may have magnetic quantum number, $m = + 1$ and spin quantum number, $s = - \frac{1}{2}$ in chromium $(C r)$

Discussion

4.	What factors influence the rate of chemical reaction? [3 MARKS]
Answer» What factors influence the rate of chemical reaction? [3 MARKS]

Discussion

5.	82.What is the number of degrees of freedom for an ideal gas?
Answer» 82.What is the number of degrees of freedom for an ideal gas?

Discussion

6.	What is the entropy change involved in the isothermal expansion of 5 mol of ideal gas from a volume of 10L to 100L at 300 K?
Answer» What is the entropy change involved in the isothermal expansion of 5 mol of ideal gas from a volume of 10L to 100L at 300 K?

Discussion

7.	A 8.3 L cylinder contains 128 g of O2 gas at 27 ∘C. What is the mass of O2 gas mustb e released to reduce the pressure to 6.0 bar?
Answer» A $8.3 L$ cylinder contains $128 g$ of $O_{2}$ gas at $27^{\circ} C$ . What is the mass of $O_{2}$ gas mustb e released to reduce the pressure to $6.0 bar$ ?

Discussion

8.	the vector product of two vectors can be expressed in terms of their are rectangular components as a determinant. What is the use of this very property of vector product ?
Answer» the vector product of two vectors can be expressed in terms of their are rectangular components as a determinant. What is the use of this very property of vector product ?

Discussion

9.	Which of the following is/are representations of wedge-dash form(s) of methane?
Answer» Which of the following is/are representations of wedge-dash form(s) of methane?

Discussion

10.	Find the number of molecules having two lone pair of electrons on central atom. I+3, XeF2, XeF4, H2O, NH−2, H2S, H2SO4, NF3
Answer» Find the number of molecules having two lone pair of electrons on central atom. $I_{3}^{+}, X e F_{2}, X e F_{4}, H_{2} O, N H_{2}^{-}, H_{2} S, H_{2} S O_{4}, N F_{3}$

Discussion

11.	In which reaction incorrect product is formed ?
Answer» In which reaction incorrect product is formed ?

Discussion

12.	Consider the reaction:Cl2(aq) + H2S(aq) → S(s) +2H+(aq) +2Cl-(aq)The rate equation for this reaction is rate =k[Cl2][H2S] Which of these mechanisms is/areconsistent with this rate equation?A. Cl2 + H2S → H+ + Cl- +Cl+ + HS-(slow) cl+ + HS- → H+ +Cl- + S (fast)B. H2S ⇔ H+ + HS-(fast equilibrium) Cl2 + HS- → 2Cl- + H+ + S (slow)1. A only2. B only3. Both A and B4. Neither A nor B
Answer» Consider the reaction:Cl2(aq) + H2S(aq) → S(s) +2H+(aq) +2Cl-(aq)The rate equation for this reaction is rate =k[Cl2][H2S] Which of these mechanisms is/areconsistent with this rate equation? A. Cl2 + H2S → H+ + Cl- +Cl+ + HS-(slow) cl+ + HS- → H+ +Cl- + S (fast) B. H2S ⇔ H+ + HS-(fast equilibrium) Cl2 + HS- → 2Cl- + H+ + S (slow) 1. A only 2. B only 3. Both A and B 4. Neither A nor B

12.

Consider the reaction:Cl2(aq) + H2S(aq) → S(s) +2H+(aq) +2Cl-(aq)The rate equation for this reaction is rate =k[Cl2][H2S] Which of these mechanisms is/areconsistent with this rate equation?A. Cl2 + H2S → H+ + Cl- +Cl+ + HS-(slow) cl+ + HS- → H+ +Cl- + S (fast)B. H2S ⇔ H+ + HS-(fast equilibrium) Cl2 + HS- → 2Cl- + H+ + S (slow)1. A only2. B only3. Both A and B4. Neither A nor B

Answer»

Consider the reaction:Cl2(aq) + H2S(aq) → S(s) +2H+(aq) +2Cl-(aq)The rate equation for this reaction is rate =k[Cl2][H2S] Which of these mechanisms is/areconsistent with this rate equation?

A. Cl2 + H2S → H+ + Cl- +Cl+ + HS-(slow) cl+ + HS- → H+ +Cl- + S (fast)

B. H2S ⇔ H+ + HS-(fast equilibrium) Cl2 + HS- → 2Cl- + H+ + S (slow)

1. A only

2. B only

3. Both A and B

4. Neither A nor B

Discussion

13.	The number of α−H in the 2nd most stable structure is:
Answer» The number of $α - H$ in the 2nd most stable structure is:

Discussion

14.	Why ethylcyclopentane is not considered as structural isomer of dimethylcyclopentane? Explain
Answer» Why ethylcyclopentane is not considered as structural isomer of dimethylcyclopentane? Explain

Discussion

15.	The product formed on heating calcium acetate and calcium formate is:
Answer» The product formed on heating calcium acetate and calcium formate is:

Discussion

16.	In the coordination compound, K4[Ni(CN)4], the oxidation state of nickel is
Answer» In the coordination compound, $K_{4} [N i (C N)_{4}]$ , the oxidation state of nickel is

Discussion

17.	6.What is atomic stability?
Answer» 6.What is atomic stability?

Discussion

18.	PhC≡C−CH3H3O+/Hg+2−−−−−−−−→A. Then 'A' is
Answer» $P h C \equiv C - C H_{3} H_{3} O^{+} / H g^{+ 2} - ------- \to A$ . Then 'A' is

Discussion

19.	Arrange the following in increasing extent of hydrolysis c6h5cocl c6h5conh2 and c6h5cooch3
Answer» Arrange the following in increasing extent of hydrolysis c6h5cocl c6h5conh2 and c6h5cooch3

Discussion

20.	43.Mention the structure by calculating the hybridisation of the ion-[Ag(NH3)2]+
Answer» 43.Mention the structure by calculating the hybridisation of the ion-[Ag(NH3)2]+

Discussion

21.	8 g of sulphur is burnt to form so2 which was then completely oxidized into sulphur trioxide that was finally absorbed into cold water. the solution was then treated with excess of barium chloride solution. Find the number of moles of Barium sulphate precipitated
Answer» 8 g of sulphur is burnt to form so2 which was then completely oxidized into sulphur trioxide that was finally absorbed into cold water. the solution was then treated with excess of barium chloride solution. Find the number of moles of Barium sulphate precipitated

Discussion

22.	Find the product when 3-chlorocyclobutanoic acid is heated with soda lime. Give the mechanism too.
Answer» Find the product when 3-chlorocyclobutanoic acid is heated with soda lime. Give the mechanism too.

Discussion

23.	For H2O(l) (1bar,373K) being transformed to H2O(g) (1bar,373K), the correct set of thermodynamic parameters is:
Answer» For $H_{2} O (l) (1 b a r, 373 K)$ being transformed to $H_{2} O (g) (1 b a r, 373 K)$ , the correct set of thermodynamic parameters is:

Discussion

24.	All form ideal solutions except:
Answer» All form ideal solutions except:

Discussion

25.	The species given below that does NOT show disproportionation reaction is:
Answer» The species given below that does $N O T$ show disproportionation reaction is:

Discussion

26.	1°, 2°, 3° and 4° carbon atoms meaning
Answer» 1°, 2°, 3° and 4° carbon atoms meaning

Discussion

27.	; A is
Answer» ; A is

Discussion

28.	during finding the aromaticity of compound what is the significance of + or- sign on compoun
Answer» during finding the aromaticity of compound what is the significance of + or- sign on compoun

Discussion

29.	Thallium shows different oxidation states because -
Answer» Thallium shows different oxidation states because -

Discussion

30.	For any two sets A and B, A'-B' is equals to
Answer» For any two sets A and B, A'-B' is equals to

Discussion

31.	The final product (V) is:
Answer» The final product (V) is:

Discussion

32.	What is cyst formation? What is meant by encysted
Answer» What is cyst formation? What is meant by encysted

Discussion

33.	A solution of colourless salt 'S' on boiling with excess NaOH produces a non-flammable gas. The evolution of the gas ceases after sometime. Upon addition of Zn dust to the same solution, the gas is evolved again. The colourless salt(s) 'S' can be:
Answer» A solution of colourless salt 'S' on boiling with excess $N a O H$ produces a non-flammable gas. The evolution of the gas ceases after sometime. Upon addition of $Z n$ dust to the same solution, the gas is evolved again. The colourless salt(s) 'S' can be:

Discussion

34.	What is the mass of 3.01×1022 molecules of NH3?
Answer» What is the mass of $3.01 \times 10^{22}$ molecules of $N H_{3}$ ?

Discussion

35.	Which is correct regarding to binding energy of uranium nuclear fission? (a) E barium +E krpton -E uranium - 2 nutron =200mev (b) E barium - E krpton -E uranium +2 nutron =200mev (c) E barium +E krypton - E uranium + 2 nutron =200mev (d) none of this
Answer» Which is correct regarding to binding energy of uranium nuclear fission? (a) E barium +E krpton -E uranium - 2 nutron =200mev (b) E barium - E krpton -E uranium +2 nutron =200mev (c) E barium +E krypton - E uranium + 2 nutron =200mev (d) none of this

Discussion

36.	{ The solubility product of hydroxides of }Mg^{+2},Zn^{-2} , }} and Fet's decreases as }{K_{sp}Mg(OH)_2>K_{sp}Zn(OH)_2>K_{sp}Fe(OH)_3 The }} order of precipitation of hydroxides is:- }{(1)Fe(OH)_3,\quad Zn(OH_2,Fe(OH)_3}{(3)An(OH)_2,FeOH_3,Mg(OH)_2}{(4)Zn(OH)_2,Mg(OH)_2,FeOH_3
Answer» { The solubility product of hydroxides of }Mg^{+2},Zn^{-2} , }} and Fet's decreases as }{K_{sp}Mg(OH)_2>K_{sp}Zn(OH)_2>K_{sp}Fe(OH)_3 The }} order of precipitation of hydroxides is:- }{(1)Fe(OH)_3,\quad Zn(OH_2,Fe(OH)_3}{(3)An(OH)_2,FeOH_3,Mg(OH)_2}{(4)Zn(OH)_2,Mg(OH)_2,FeOH_3

Discussion

37.	The action of bromine water (excess) on salicylic acid results in the formation of
Answer» The action of bromine water (excess) on salicylic acid results in the formation of

Discussion

38.	4. A chemist has one solution which is 50% acidic and a second solution which is 25% acidic. How much of each should be mixed together make 10 litres of 40% acidic solution?
Answer» 4. A chemist has one solution which is 50% acidic and a second solution which is 25% acidic. How much of each should be mixed together make 10 litres of 40% acidic solution?

Discussion

39.	At 48∘C the vapour pressure of pure CS2 is 850 torr. A solution of 2.0 g of sulphur in 100 g of CS2 has a vapour pressure 844.9 torr. Determine the atomicity of sulphur molecules:
Answer» At $48^{\circ} C$ the vapour pressure of pure $C S_{2} is 850 torr$ . A solution of $2.0 g$ of sulphur in $100 g of C S_{2}$ has a vapour pressure $844.9 torr$ . Determine the atomicity of sulphur molecules:

Discussion

40.	12.what is hybridisation of Benzene
Answer» 12.what is hybridisation of Benzene

Discussion

41.	Do electrons move in an orbit, if yes then won't they undergo acceleration and fall inside the nucleus,if not due to effective nuclear charge the would be pulled by nucleus??
Answer» Do electrons move in an orbit, if yes then won't they undergo acceleration and fall inside the nucleus,if not due to effective nuclear charge the would be pulled by nucleus??

Discussion

42.	28.Oxidation no of Nitrogen in H-N (=also one dative bond) C
Answer» 28.Oxidation no of Nitrogen in H-N (=also one dative bond) C

Discussion

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

Discussion

44.	An ideal monatomic gas follows a law, P proportional to T^{} in addition to ideal gas law. Then molar heat capacity for the process is
Answer» An ideal monatomic gas follows a law, P proportional to T^{} in addition to ideal gas law. Then molar heat capacity for the process is

Discussion

45.	Which of the reaction defines ΔH∘f
Answer» Which of the reaction defines $Δ H_{f}^{\circ}$

Discussion

46.	42. 20ml of 0.2 AL2(SO4)3 is mixed with 20ml of 6.6M Bacl2 the conc. Of cl anion in solution is ?
Answer» 42. 20ml of 0.2 AL2(SO4)3 is mixed with 20ml of 6.6M Bacl2 the conc. Of cl anion in solution is ?

Discussion

47.	On what factors does the hydration and lattice energy depends upon?
Answer» On what factors does the hydration and lattice energy depends upon?

Discussion

48.	19. In S_N^1 reaction alkylhalide will lead to A) Retainsion of configuration B) Inversion of configuration C) Resimiration will occur D) None of these
Answer» 19. In S_N^1 reaction alkylhalide will lead to A) Retainsion of configuration B) Inversion of configuration C) Resimiration will occur D) None of these

Discussion

49.	In a face-centred cubic lattice, atom A occupies the corner position and atom B occupies the face -centred positions. If one atom of B is missing from one of the face - centred points, the formula of the compound is
Answer» In a face-centred cubic lattice, atom A occupies the corner position and atom B occupies the face -centred positions. If one atom of B is missing from one of the face - centred points, the formula of the compound is

Discussion

50.	What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere? Discuss.
Answer» What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere? Discuss.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A given Quantity of a gas is at a pressure p and Absolute Temperature T . The isothermal bulk modulus of the gas is. 2p/3 P 3p/2 2p

which of the following salts will undergo hydrolysis and makes water alkaline (1) kcl (2) nacl (3) kno3 (4)nacn

Calculate the minimum and maximum number of electrons which may have magnetic quantum number, m=+1 and spin quantum number, s=−12 in chromium (Cr)

What factors influence the rate of chemical reaction? [3 MARKS]

82.What is the number of degrees of freedom for an ideal gas?

What is the entropy change involved in the isothermal expansion of 5 mol of ideal gas from a volume of 10L to 100L at 300 K?

A 8.3 L cylinder contains 128 g of O2 gas at 27 ∘C. What is the mass of O2 gas mustb e released to reduce the pressure to 6.0 bar?

the vector product of two vectors can be expressed in terms of their are rectangular components as a determinant. What is the use of this very property of vector product ?

Which of the following is/are representations of wedge-dash form(s) of methane?

Find the number of molecules having two lone pair of electrons on central atom. I+3, XeF2, XeF4, H2O, NH−2, H2S, H2SO4, NF3

In which reaction incorrect product is formed ?

The number of α−H in the 2nd most stable structure is:

Why ethylcyclopentane is not considered as structural isomer of dimethylcyclopentane? Explain

The product formed on heating calcium acetate and calcium formate is:

In the coordination compound, K4[Ni(CN)4], the oxidation state of nickel is

6.What is atomic stability?

PhC≡C−CH3H3O+/Hg+2−−−−−−−−→A. Then 'A' is

Arrange the following in increasing extent of hydrolysis c6h5cocl c6h5conh2 and c6h5cooch3

43.Mention the structure by calculating the hybridisation of the ion-[Ag(NH3)2]+

8 g of sulphur is burnt to form so2 which was then completely oxidized into sulphur trioxide that was finally absorbed into cold water. the solution was then treated with excess of barium chloride solution. Find the number of moles of Barium sulphate precipitated

Find the product when 3-chlorocyclobutanoic acid is heated with soda lime. Give the mechanism too.

For H2O(l) (1bar,373K) being transformed to H2O(g) (1bar,373K), the correct set of thermodynamic parameters is:

All form ideal solutions except:

The species given below that does NOT show disproportionation reaction is:

1°, 2°, 3° and 4° carbon atoms meaning

; A is

during finding the aromaticity of compound what is the significance of + or- sign on compoun

Thallium shows different oxidation states because -

For any two sets A and B, A'-B' is equals to

The final product (V) is:

What is cyst formation? What is meant by encysted

A solution of colourless salt 'S' on boiling with excess NaOH produces a non-flammable gas. The evolution of the gas ceases after sometime. Upon addition of Zn dust to the same solution, the gas is evolved again. The colourless salt(s) 'S' can be:

What is the mass of 3.01×1022 molecules of NH3?

Which is correct regarding to binding energy of uranium nuclear fission? (a) E barium +E krpton -E uranium - 2 nutron =200mev (b) E barium - E krpton -E uranium +2 nutron =200mev (c) E barium +E krypton - E uranium + 2 nutron =200mev (d) none of this

{ The solubility product of hydroxides of }Mg^{+2},Zn^{-2} , }} and Fet's decreases as }{K_{sp}Mg(OH)_2>K_{sp}Zn(OH)_2>K_{sp}Fe(OH)_3 The }} order of precipitation of hydroxides is:- }{(1)Fe(OH)_3,\quad Zn(OH_2,Fe(OH)_3}{(3)An(OH)_2,FeOH_3,Mg(OH)_2}{(4)Zn(OH)_2,Mg(OH)_2,FeOH_3

The action of bromine water (excess) on salicylic acid results in the formation of

4. A chemist has one solution which is 50% acidic and a second solution which is 25% acidic. How much of each should be mixed together make 10 litres of 40% acidic solution?

At 48∘C the vapour pressure of pure CS2 is 850 torr. A solution of 2.0 g of sulphur in 100 g of CS2 has a vapour pressure 844.9 torr. Determine the atomicity of sulphur molecules:

12.what is hybridisation of Benzene

Do electrons move in an orbit, if yes then won't they undergo acceleration and fall inside the nucleus,if not due to effective nuclear charge the would be pulled by nucleus??

28.Oxidation no of Nitrogen in H-N (=also one dative bond) C

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

An ideal monatomic gas follows a law, P proportional to T^{} in addition to ideal gas law. Then molar heat capacity for the process is

Which of the reaction defines ΔH∘f

42. 20ml of 0.2 AL2(SO4)3 is mixed with 20ml of 6.6M Bacl2 the conc. Of cl anion in solution is ?

On what factors does the hydration and lattice energy depends upon?

19. In S_N^1 reaction alkylhalide will lead to A) Retainsion of configuration B) Inversion of configuration C) Resimiration will occur D) None of these

In a face-centred cubic lattice, atom A occupies the corner position and atom B occupies the face -centred positions. If one atom of B is missing from one of the face - centred points, the formula of the compound is

What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere? Discuss.