46295 + Interview Questions in Chemistry

1.	The phrase "periodicity in the properties of elements” means that when elements are arranged in the increasing order of their atomic numbers, similar elements
Answer» The phrase "periodicity in the properties of elements” means that when elements are arranged in the increasing order of their atomic numbers, similar elements

Discussion

2.	Which of the following orbital overlap is allowed?
Answer» Which of the following orbital overlap is allowed?

Discussion

3.	Find A,B and C in the following reactions:NH3+A+CO2→(NH4)2CO3(NH4)2CO3+H2O+B→NH4HCO3NH4HCO3+NaCl→NH4Cl+C
Answer» Find $A, B$ and $C$ in the following reactions: $N H_{3} + A + C O_{2} \to {(N H_{4})}_{2} C O_{3}$ ${(N H_{4})}_{2} C O_{3} + H_{2} O + B \to N H_{4} H C O_{3}$ $N H_{4} H C O_{3} + N a C l \to N H_{4} C l + C$

3.

Find A,B and C in the following reactions:NH3+A+CO2→(NH4)2CO3(NH4)2CO3+H2O+B→NH4HCO3NH4HCO3+NaCl→NH4Cl+C

Answer»

Find $A, B$ and $C$ in the following reactions:

$N H_{3} + A + C O_{2} \to {(N H_{4})}_{2} C O_{3}$

${(N H_{4})}_{2} C O_{3} + H_{2} O + B \to N H_{4} H C O_{3}$

$N H_{4} H C O_{3} + N a C l \to N H_{4} C l + C$

Discussion

4.	Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide?
Answer» Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide?

Discussion

5.	Conversion of CH4 to CH3Cl is an example of which of the following reaction?
Answer» Conversion of $C H_{4}$ to $C H_{3} C l$ is an example of which of the following reaction?

Discussion

6.	20ml of 0.2M Al2(So4)3 is mixed with 20 ml of6.6 M Bacl2 the concentration of Cl- ion in the solution
Answer» 20ml of 0.2M Al2(So4)3 is mixed with 20 ml of6.6 M Bacl2 the concentration of Cl- ion in the solution

Discussion

7.	Why van der Waals radius is considered regarding Noble gas instead of covalent radius while moving in a period?
Answer» Why van der Waals radius is considered regarding Noble gas instead of covalent radius while moving in a period?

Discussion

8.	Which of the following shows the correct order of decreasing acidity?(Here Ph− indicates phenyl group)
Answer» Which of the following shows the correct order of decreasing acidity? (Here $P h -$ indicates phenyl group)

Discussion

9.	The instantanous rate of Dissaperance MnO4- ion in the following reaction is 4.56 x 10^-3 ms2 MnO^-4 + 10 I^- + 16H^+ gives 2Mn^+2 + 5 I2 + 8H2OThe rate of apperance of I2 is(a) 1.14 x 10^-3(b) 5.7×10^-3(c) 4.56x10^-4(d) 1. 14x10^-2
Answer» The instantanous rate of Dissaperance MnO4- ion in the following reaction is 4.56 x 10^-3 ms 2 MnO^-4 + 10 I^- + 16H^+ gives 2Mn^+2 + 5 I2 + 8H2O The rate of apperance of I2 is (a) 1.14 x 10^-3 (b) 5.7×10^-3 (c) 4.56x10^-4 (d) 1. 14x10^-2

Discussion

10.	38. A stationary He+ ion emitted a photon corresponding to the first line of H of Lyman series. The photon liberated photoelectron from a stationary H atom in the ground state. What is the velocity of electron.
Answer» 38. A stationary ${H e}^{+}$ ion emitted a photon corresponding to the first line of H of Lyman series. The photon liberated photoelectron from a stationary H atom in the ground state. What is the velocity of electron.

Discussion

11.	Which of the following has the lowest melting point?
Answer» Which of the following has the lowest melting point?

Discussion

12.	6 The enthalpy of formation of water is 57.4 kJ/mole. What will be the exerted heat if 60gm Acetic acid and 40 gm NaOH are mixed? 1. >57.4 2.
Answer» 6 The enthalpy of formation of water is 57.4 kJ/mole. What will be the exerted heat if 60gm Acetic acid and 40 gm NaOH are mixed? 1. >57.4 2. <57.4 3. 57.4 2.What will be its value if 120gm of acetic acid and 80 gm of NaOH are mixed?

Discussion

13.	a uranium mineral contains U^{238 }and Pb^{206 }in the ratio 4:1 by weight. Calculate the age of mineral (t_{1/2 }for U^{238}=4.5 × 10^9 years)
Answer» a uranium mineral contains U^{238 }and Pb^{206 }in the ratio 4:1 by weight. Calculate the age of mineral (t_{1/2 }for U^{238}=4.5 × 10^9 years)

Discussion

14.	Percentage strength of 20 volume H2O2 solution is
Answer» Percentage strength of 20 volume H2O2 solution is

Discussion

15.	Hybridisation
Answer» Hybridisation

Discussion

16.	gaseous mixture conatins 32%o2 and 68%nh3 by mass .density of mixture at 0degreee celcius and 1atm is
Answer» gaseous mixture conatins 32%o2 and 68%nh3 by mass .density of mixture at 0degreee celcius and 1atm is

Discussion

17.	Based on the octet rule, boron will most likely form:
Answer» Based on the octet rule, boron will most likely form:

Discussion

18.	Product (A) is:
Answer» Product (A) is:

Discussion

19.	which of the following is not related with lanthanoid contraction 1. atomic radius Zr andHf is almost same 2.ionisation energy of Hg is more than that of Cd 3.atomic radius of Al and Ga is almost same 4. atomic radius difference between In and Tl is less than that Ga and Tl
Answer» which of the following is not related with lanthanoid contraction 1. atomic radius Zr andHf is almost same 2.ionisation energy of Hg is more than that of Cd 3.atomic radius of Al and Ga is almost same 4. atomic radius difference between In and Tl is less than that Ga and Tl

Discussion

20.	A particle of mass M moves along the line y=x with velocity v. Its angular momentum about origin is
Answer» A particle of mass M moves along the line y=x with velocity v. Its angular momentum about origin is

Discussion

21.	An α−particle and a proton, moving with same kinetic energy approach a gold foil. If the distance of closest approach for proton is x, what will be its value for the α−particle?
Answer» An $α -$ particle and a proton, moving with same kinetic energy approach a gold foil. If the distance of closest approach for proton is $x$ , what will be its value for the $α -$ particle?

Discussion

22.	β− Elimination or anti-elimination reaction is carried out with base (B⊖) as shown.The following bases are used,(I) ⊖OH(II) RO⊖(III) RCOO⊖(IV) ⊖CN(V) NO⊖3The decreasing order of reactivity for the above elimination is :
Answer» $β -$ Elimination or anti-elimination reaction is carried out with base $(B^{⊖})$ as shown. The following bases are used, $(I) ⊖ O H (I I) R O^{⊖} (I I I) R C O O^{⊖} (I V) ⊖ C N (V) N O_{3}^{⊖}$ The decreasing order of reactivity for the above elimination is :

Discussion

23.	A crystal of lead (II) sulphide has a NaCl structure. In this crystal, the shortest distance between a Pb2+ ion and S2− ion is 297 pm. What is the volume of unit cell in lead sulphide?(Given, (594)3=209584584)
Answer» A crystal of lead $(I I)$ sulphide has a $N a C l$ structure. In this crystal, the shortest distance between a $P b^{2 +}$ ion and $S^{2 -}$ ion is $297 pm$ . What is the volume of unit cell in lead sulphide? (Given, $(594)^{3} = 209584584$ )

Discussion

24.	A large flat metal surface has a uniform charge density, sigma. An electron of mass m and charge e leaves the surface at a point A with speed u , returns at B. The maximum value of AB is
Answer» A large flat metal surface has a uniform charge density, sigma. An electron of mass m and charge e leaves the surface at a point A with speed u , returns at B. The maximum value of AB is

Discussion

25.	Which of the following is a buffer solution? (a) 500ml of 0.1N CH_3COOH+500ml of 0.1 N NaOH (b) 500ml of 0.1N CH_3COOH+500ml of 0.1N HCl (c) 500ml of 0.1N CH_3COOH+500ml of 0.N NaOH (d) 500ml of 0.2N CH3COOH+500ml of 0.1N NaOH
Answer» Which of the following is a buffer solution? (a) 500ml of 0.1N CH_3COOH+500ml of 0.1 N NaOH (b) 500ml of 0.1N CH_3COOH+500ml of 0.1N HCl (c) 500ml of 0.1N CH_3COOH+500ml of 0.N NaOH (d) 500ml of 0.2N CH3COOH+500ml of 0.1N NaOH

Discussion

26.	The value of specific conductivity is maximum for(1)0.1M NaCl (2)0.01M NaCl (3)10-4M NaCl (4)all will have same specific conductivity
Answer» The value of specific conductivity is maximum for (1)0.1M NaCl (2)0.01M NaCl (3)10-4M NaCl (4)all will have same specific conductivity

Discussion

27.	7. Which of the followiNG structures are symetrical? A xef4 B xef6 C so2 D NH3(+2) Options 1 A and B 2 b and c 3 c and d 4 a and d
Answer» 7. Which of the followiNG structures are symetrical? A xef4 B xef6 C so2 D NH3(+2) Options 1 A and B 2 b and c 3 c and d 4 a and d

Discussion

28.	The work done by 2 mole of an ideal gas at 300 K in a reversible isothermal expansion from 10 litres to 20 litres is
Answer» The work done by 2 mole of an ideal gas at 300 K in a reversible isothermal expansion from 10 litres to 20 litres is

Discussion

29.	For the reaction A + B= Products,a. On doubling the initial concentration of A only the rate of reaction is also doubled &b. On doubling the initial concentration of both A& B, there is A change in rate of reaction by A factor of 8.The rate of reaction is given by:- ?
Answer» For the reaction A + B= Products, a. On doubling the initial concentration of A only the rate of reaction is also doubled & b. On doubling the initial concentration of both A& B, there is A change in rate of reaction by A factor of 8. The rate of reaction is given by:- ?

Discussion

30.	12. Precipitate of Mg(OH)2 attains blue colour when precipitated in the presence of magneson reagent .How and why?
Answer» 12. Precipitate of Mg(OH)2 attains blue colour when precipitated in the presence of magneson reagent .How and why?

Discussion

31.	12. STATEMENT 1: If one component obeyed Raoult's law over a certain range of composition, the other components would not obey Henry's law in that range. STATEMENT 2: Raoult's law is a special case of Henry's law. Is Statement 1 and 2 correct? If both are correct, is 2 a correct explanation of 1?
Answer» 12. STATEMENT 1: If one component obeyed Raoult's law over a certain range of composition, the other components would not obey Henry's law in that range. STATEMENT 2: Raoult's law is a special case of Henry's law. Is Statement 1 and 2 correct? If both are correct, is 2 a correct explanation of 1?

Discussion

32.	0.30 g of an organic compound gave 0.550 g of magnesium pyrophosphate by usual analysis. Calculate the percentage of phosphorous in the compound.
Answer» $0.30 g$ of an organic compound gave $0.550 g$ of magnesium pyrophosphate by usual analysis. Calculate the percentage of phosphorous in the compound.

Discussion

33.	In the above reaction Q may be:
Answer» In the above reaction Q may be:

Discussion

34.	Explain nitration of aniline ( o,m and p ) products . which one is major ? And their percentage ?
Answer» Explain nitration of aniline ( o,m and p ) products . which one is major ? And their percentage ?

Discussion

35.	A bomb containing 5.4g of Al and 15.97g of Fe2O3 is placed in an ice calorimeter containing initially 8 kgof ice and 8 kg of water. The reaction 2Al(s) + Fe203(s) → Al2O3(s) + 2Fe(s) is set off by remote control andit is then observed that the calorimeter contains 7.746 kg of ice and 8.254 kg of water. Find the AH for theabove reaction.H fusion (ice)=1.436kcal/m
Answer» A bomb containing 5.4g of Al and 15.97g of Fe2O3 is placed in an ice calorimeter containing initially 8 kgof ice and 8 kg of water. The reaction 2Al(s) + Fe203(s) → Al2O3(s) + 2Fe(s) is set off by remote control andit is then observed that the calorimeter contains 7.746 kg of ice and 8.254 kg of water. Find the AH for theabove reaction.H fusion (ice)=1.436kcal/m

Discussion

36.	64. The boiling point of water at 735 torr is 99.07 degree Celsius the mass of NaCl added in hundred gram water to make its boiling point 100 degree celsius is (KB equal to 0.51 K kg per mole kg per mole
Answer» 64. The boiling point of water at 735 torr is 99.07 degree Celsius the mass of NaCl added in hundred gram water to make its boiling point 100 degree celsius is (KB equal to 0.51 K kg per mole kg per mole

Discussion

37.	Benzaldehyde undergoes aldol condensation in -
Answer» Benzaldehyde undergoes aldol condensation in -

Discussion

38.	CH3CHO +cl2_____X +C6H5NH2+alc.KOH_____
Answer» CH3CHO +cl2_____X +C6H5NH2+alc.KOH_____

Discussion

39.	Metal deficiency defect
Answer» Metal deficiency defect

Discussion

40.	When -cocl grp in a compound becomes prefix then what name should be used 'Chlorocarbonyl' or ' chloroformyl '
Answer» When -cocl grp in a compound becomes prefix then what name should be used 'Chlorocarbonyl' or ' chloroformyl '

Discussion

41.	Which of the following has the highest ionic mobility in an aqueous solution?
Answer» Which of the following has the highest ionic mobility in an aqueous solution?

Discussion

42.	Compare melting pt of slag and metal like Fe
Answer» Compare melting pt of slag and metal like Fe

Discussion

43.	(A) α−Amino acid(C3H7NO3)MeOH−−−−→HCl(B)(C4H10NO3Cl)PCl5−−−→(C)(C4H9NO2Cl2) (C)(C4H9NO2Cl2)H3O+−−−→(D)(C3H6NO2Cl)Na−Hg−−−−−→HClAlanine Compound (C) is :
Answer» $(A) α - Amino acid (C_{3} H_{7} N O_{3}) M e O H - --- \to H C l (B) (C_{4} H_{10} N O_{3} C l) P C l_{5} - -- \to (C) (C_{4} H_{9} N O_{2} C l_{2})$ $(C) (C_{4} H_{9} N O_{2} C l_{2}) H_{3} O^{+} - -- \to (D) (C_{3} H_{6} N O_{2} C l) N a - H g - ---- \to H C l Alanine$ Compound (C) is :

Discussion

44.	The intermolecular interaction that is dependent on the inverse cube of the distance between the molecules is
Answer» The intermolecular interaction that is dependent on the inverse cube of the distance between the molecules is

Discussion

45.	Blood cells retain their normal shape in solution which are
Answer» Blood cells retain their normal shape in solution which are

Discussion

46.	Oxidation numebr of Ag in Na3[Ag(S2O3)2] is:
Answer» Oxidation numebr of Ag in $N a_{3} [A g (S_{2} O_{3})_{2}]$ is:

Discussion

47.	51. The mass of FeSO4 required to liberate 44.8L of gaseous product at STP on its heating is FeSO4- Fe2O3 + SO2 + SO3
Answer» 51. The mass of FeSO4 required to liberate 44.8L of gaseous product at STP on its heating is FeSO4- Fe2O3 + SO2 + SO3

Discussion

48.	what is diff b/w hypervalent or e- rich hydrides ?/
Answer» what is diff b/w hypervalent or e- rich hydrides ?/

Discussion

49.	A sample of 0.469 g of chloroplatinate of a monoacidic base on decomposition gave 0.195 g of platinum. The molecular formula of the base can be
Answer» A sample of 0.469 g of chloroplatinate of a monoacidic base on decomposition gave 0.195 g of platinum. The molecular formula of the base can be

Discussion

50.	(Marking scheme for all questions will be: correct answer +3 and wrong answer -1) The number of photons emitted when electrons in a H-atom make transition from a higher energy state to lower energy state, whose difference in angular momentum is h/π , are made to fall incidently on sodium metal (work function, W=2.3 eV). The maximum possible kinetic energy of emitted photoelectrons is:
Answer» (Marking scheme for all questions will be: correct answer +3 and wrong answer -1) The number of photons emitted when electrons in a H-atom make transition from a higher energy state to lower energy state, whose difference in angular momentum is $h / π$ , are made to fall incidently on sodium metal (work function, $W = 2.3 eV)$ . The maximum possible kinetic energy of emitted photoelectrons is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The phrase "periodicity in the properties of elements” means that when elements are arranged in the increasing order of their atomic numbers, similar elements

Which of the following orbital overlap is allowed?

Find A,B and C in the following reactions:NH3+A+CO2→(NH4)2CO3(NH4)2CO3+H2O+B→NH4HCO3NH4HCO3+NaCl→NH4Cl+C

Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide?

Conversion of CH4 to CH3Cl is an example of which of the following reaction?

20ml of 0.2M Al2(So4)3 is mixed with 20 ml of6.6 M Bacl2 the concentration of Cl- ion in the solution

Why van der Waals radius is considered regarding Noble gas instead of covalent radius while moving in a period?

Which of the following shows the correct order of decreasing acidity?(Here Ph− indicates phenyl group)

The instantanous rate of Dissaperance MnO4- ion in the following reaction is 4.56 x 10^-3 ms2 MnO^-4 + 10 I^- + 16H^+ gives 2Mn^+2 + 5 I2 + 8H2OThe rate of apperance of I2 is(a) 1.14 x 10^-3(b) 5.7×10^-3(c) 4.56x10^-4(d) 1. 14x10^-2

38. A stationary He+ ion emitted a photon corresponding to the first line of H of Lyman series. The photon liberated photoelectron from a stationary H atom in the ground state. What is the velocity of electron.

Which of the following has the lowest melting point?

6 The enthalpy of formation of water is 57.4 kJ/mole. What will be the exerted heat if 60gm Acetic acid and 40 gm NaOH are mixed? 1. >57.4 2.

a uranium mineral contains U^{238 }and Pb^{206 }in the ratio 4:1 by weight. Calculate the age of mineral (t_{1/2 }for U^{238}=4.5 × 10^9 years)

Percentage strength of 20 volume H2O2 solution is

Hybridisation

gaseous mixture conatins 32%o2 and 68%nh3 by mass .density of mixture at 0degreee celcius and 1atm is

Based on the octet rule, boron will most likely form:

Product (A) is:

which of the following is not related with lanthanoid contraction 1. atomic radius Zr andHf is almost same 2.ionisation energy of Hg is more than that of Cd 3.atomic radius of Al and Ga is almost same 4. atomic radius difference between In and Tl is less than that Ga and Tl

A particle of mass M moves along the line y=x with velocity v. Its angular momentum about origin is

An α−particle and a proton, moving with same kinetic energy approach a gold foil. If the distance of closest approach for proton is x, what will be its value for the α−particle?

β− Elimination or anti-elimination reaction is carried out with base (B⊖) as shown.The following bases are used,(I) ⊖OH(II) RO⊖(III) RCOO⊖(IV) ⊖CN(V) NO⊖3The decreasing order of reactivity for the above elimination is :

A crystal of lead (II) sulphide has a NaCl structure. In this crystal, the shortest distance between a Pb2+ ion and S2− ion is 297 pm. What is the volume of unit cell in lead sulphide?(Given, (594)3=209584584)

A large flat metal surface has a uniform charge density, sigma. An electron of mass m and charge e leaves the surface at a point A with speed u , returns at B. The maximum value of AB is

Which of the following is a buffer solution? (a) 500ml of 0.1N CH_3COOH+500ml of 0.1 N NaOH (b) 500ml of 0.1N CH_3COOH+500ml of 0.1N HCl (c) 500ml of 0.1N CH_3COOH+500ml of 0.N NaOH (d) 500ml of 0.2N CH3COOH+500ml of 0.1N NaOH

The value of specific conductivity is maximum for(1)0.1M NaCl (2)0.01M NaCl (3)10-4M NaCl (4)all will have same specific conductivity

7. Which of the followiNG structures are symetrical? A xef4 B xef6 C so2 D NH3(+2) Options 1 A and B 2 b and c 3 c and d 4 a and d

The work done by 2 mole of an ideal gas at 300 K in a reversible isothermal expansion from 10 litres to 20 litres is

For the reaction A + B= Products,a. On doubling the initial concentration of A only the rate of reaction is also doubled &b. On doubling the initial concentration of both A& B, there is A change in rate of reaction by A factor of 8.The rate of reaction is given by:- ?

12. Precipitate of Mg(OH)2 attains blue colour when precipitated in the presence of magneson reagent .How and why?

12. STATEMENT 1: If one component obeyed Raoult's law over a certain range of composition, the other components would not obey Henry's law in that range. STATEMENT 2: Raoult's law is a special case of Henry's law. Is Statement 1 and 2 correct? If both are correct, is 2 a correct explanation of 1?

0.30 g of an organic compound gave 0.550 g of magnesium pyrophosphate by usual analysis. Calculate the percentage of phosphorous in the compound.

In the above reaction Q may be:

Explain nitration of aniline ( o,m and p ) products . which one is major ? And their percentage ?

64. The boiling point of water at 735 torr is 99.07 degree Celsius the mass of NaCl added in hundred gram water to make its boiling point 100 degree celsius is (KB equal to 0.51 K kg per mole kg per mole

Benzaldehyde undergoes aldol condensation in -

CH3CHO +cl2_____X +C6H5NH2+alc.KOH_____

Metal deficiency defect

When -cocl grp in a compound becomes prefix then what name should be used 'Chlorocarbonyl' or ' chloroformyl '

Which of the following has the highest ionic mobility in an aqueous solution?

Compare melting pt of slag and metal like Fe

(A) α−Amino acid(C3H7NO3)MeOH−−−−→HCl(B)(C4H10NO3Cl)PCl5−−−→(C)(C4H9NO2Cl2) (C)(C4H9NO2Cl2)H3O+−−−→(D)(C3H6NO2Cl)Na−Hg−−−−−→HClAlanine Compound (C) is :

The intermolecular interaction that is dependent on the inverse cube of the distance between the molecules is

Blood cells retain their normal shape in solution which are

Oxidation numebr of Ag in Na3[Ag(S2O3)2] is:

51. The mass of FeSO4 required to liberate 44.8L of gaseous product at STP on its heating is FeSO4- Fe2O3 + SO2 + SO3

what is diff b/w hypervalent or e- rich hydrides ?/

A sample of 0.469 g of chloroplatinate of a monoacidic base on decomposition gave 0.195 g of platinum. The molecular formula of the base can be

CH3CHO +cl2_X +C6H5NH2+alc.KOH_