46295 + Interview Questions in Chemistry

1.	Consider the elements: Cs, Ne, I and F (a) Identify the element that exhibits only negative oxidation state. (b) Identify the element that exhibits only postive oxidation state. (c) Identify the element that exhibits both positive and negative oxidation states. (d) Identify the element which exhibits neither the negative nor does the positive oxidation state.
Answer» Consider the elements: Cs, Ne, I and F (a) Identify the element that exhibits only negative oxidation state. (b) Identify the element that exhibits only postive oxidation state. (c) Identify the element that exhibits both positive and negative oxidation states. (d) Identify the element which exhibits neither the negative nor does the positive oxidation state.

1.

Consider the elements: Cs, Ne, I and F (a) Identify the element that exhibits only negative oxidation state. (b) Identify the element that exhibits only postive oxidation state. (c) Identify the element that exhibits both positive and negative oxidation states. (d) Identify the element which exhibits neither the negative nor does the positive oxidation state.

Answer»

Consider the elements:

Cs, Ne, I and F

(a) Identify the
element that exhibits only negative oxidation state.

(b) Identify the
element that exhibits only postive oxidation state.

(c) Identify the
element that exhibits both positive and negative oxidation states.

(d) Identify the element which exhibits neither the negative nor
does the positive oxidation state.

Discussion

2.	Combustion of some amount of ethylene, 6235 kJ heat was evolved. The heat of combustion of 1 mole of ethylene is 1511 kJ, What will be the volume of O2 (at NTP) that entered into the reaction is?
Answer» Combustion of some amount of ethylene, $6235 kJ$ heat was evolved. The heat of combustion of $1$ mole of ethylene is $1511 kJ$ , What will be the volume of $O_{2}$ (at NTP) that entered into the reaction is?

Discussion

3.	Which of the following atom in their ground state has maximum electron that has n+l+m=31) Zn 2)Mn 3)Sc d)P
Answer» Which of the following atom in their ground state has maximum electron that has n+l+m=3 1) Zn 2)Mn 3)Sc d)P

Discussion

4.	Calculate [OH−] of a 0.01 M solution of ammonium hydroxide. The ionization constant for NH4OH (kb)=1.6×10−5 (Take log2=0.30)
Answer» Calculate $[O H^{-}]$ of a 0.01 M solution of ammonium hydroxide. The ionization constant for $N H_{4} O H (k_{b}) = 1.6 \times 10^{- 5}$ (Take $l o g 2 = 0.30$ )

Discussion

5.	Which of the following combinations contains only isoelectronic species?
Answer» Which of the following combinations contains only isoelectronic species?

Discussion

6.	how many molucle of Na in NaCl compound?
Answer» how many molucle of Na in NaCl compound?

Discussion

7.	Tautomerism is not exhibited by
Answer» Tautomerism is not exhibited by

Discussion

8.	Give reactions to convert benzene to 1. Hexan1,6-dioic acid 2. Cyclopen†an one 3. Cyclopen†an e 4. Bromo cyclo pen†an e 5. Cyclopentene 6. Pentan1,5-dioic acid 7. Cyclobu†an one 8. Cyclobuta
Answer» Give reactions to convert benzene to 1. Hexan1,6-dioic acid 2. Cyclopen†an one 3. Cyclopen†an e 4. Bromo cyclo pen†an e 5. Cyclopentene 6. Pentan1,5-dioic acid 7. Cyclobu†an one 8. Cyclobuta

Discussion

9.	What is the IUPAC name of the simplest bicyclo compound?
Answer» What is the IUPAC name of the simplest bicyclo compound?

Discussion

10.	Illustration: The mass of a box is 2.3 kg. Two marbles of masses 2.15 g and 12.39 g are added to it. Find the total mass of the box to the correct number of significant figures.
Answer» Illustration: The mass of a box is 2.3 kg. Two marbles of masses 2.15 g and 12.39 g are added to it. Find the total mass of the box to the correct number of significant figures.

Discussion

11.	In allene (C3H4), the types(s) of hydridisation of the carbon atoms is (are)
Answer» In allene $(C_{3} H_{4})$ , the types(s) of hydridisation of the carbon atoms is (are)

Discussion

12.	Which of the following cleavage of bond can result in Homolytic Cleavage?
Answer» Which of the following cleavage of bond can result in Homolytic Cleavage?

Discussion

13.	A radioactive sample decays by 63% in 10 seconds. Time taken by it to decay by 50% in seconds is [Take ln(2) = 0.693] (Write upto two digits after the decimal point.)
Answer» A radioactive sample decays by 63% in 10 seconds. Time taken by it to decay by 50% in seconds is [Take ln(2) = 0.693] (Write upto two digits after the decimal point.)

Discussion

14.	12.What is the difference between gravitational potential energy and gravitational potential??
Answer» 12.What is the difference between gravitational potential energy and gravitational potential??

Discussion

15.	Mole fraction of solvent in aqueous solution of NaOH having molality of 3 is ?
Answer» Mole fraction of solvent in aqueous solution of NaOH having molality of 3 is ?

Discussion

16.	Calculate the osmotic pressure of 5%solution of cane sugar at 300K.
Answer» Calculate the osmotic pressure of 5%solution of cane sugar at 300K.

Discussion

17.	Dry air was passed through a beaker solution containing 15 g of solute and 120 g of water. Then, it passed through a beaker containing pure water solvent. Loss in weight of the solution beaker was 2 g and loss in weight of solvent beaker was 0.05 g. What is the molecular weight of the solute ?
Answer» Dry air was passed through a beaker solution containing $15 g$ of solute and $120 g$ of water. Then, it passed through a beaker containing pure water solvent. Loss in weight of the solution beaker was $2 g$ and loss in weight of solvent beaker was $0.05 g$ . What is the molecular weight of the solute ?

Discussion

18.	Which of the following shows:-Highest interpartical spacesHighest interpartical force of attractionDensity Arrangement of particlesHighest Kinetic energyShape and volumeHighest compressibilityMelting and boiling pointDiffusionBetween solid,liquid,gas,plasma,BEC in tabular form
Answer» Which of the following shows:- Highest interpartical spaces Highest interpartical force of attraction Density Arrangement of particles Highest Kinetic energy Shape and volume Highest compressibility Melting and boiling point Diffusion Between solid,liquid,gas,plasma,BEC in tabular form

Discussion

19.	The ratio of radii of first Bohr orbits of He+, Li2+ and Be3+ is:
Answer» The ratio of radii of first Bohr orbits of $H e^{+}, L i^{2 +}$ and $B e^{3 +}$ is:

Discussion

20.	How does chemical equilibrium is important for numerous biological and environmental processes explain in detail
Answer» How does chemical equilibrium is important for numerous biological and environmental processes explain in detail

Discussion

21.	59 Which of the following undergoes hydrolysis at faster rate and why? 1) CH3-CHCl-CH3 2) CH3-CH(CH3)-CH2Cl
Answer» 59 Which of the following undergoes hydrolysis at faster rate and why? 1) CH3-CHCl-CH3 2) CH3-CH(CH3)-CH2Cl

Discussion

22.	The addition of HBr is easiest with(1) CH2=CH-Cl (2) Cl-CH=CH-Cl(3) CH3-CH=CH2 (4) (CH3)2C=CH2
Answer» The addition of HBr is easiest with (1) CH2=CH-Cl (2) Cl-CH=CH-Cl (3) CH3-CH=CH2 (4) (CH3)2C=CH2

Discussion

23.	what is the electric potential at the surface of the gold nucleus? the nuclear radius is 6.6*10 to the power -15 m and the atomic numbe of gold, Z=79
Answer» what is the electric potential at the surface of the gold nucleus? the nuclear radius is 6.6*10 to the power -15 m and the atomic numbe of gold, Z=79

Discussion

24.	8. What is the IUPAC name of (CH3CH2)2NCH3
Answer» 8. What is the IUPAC name of (CH3CH2)2NCH3

Discussion

25.	At 300 K, ΔH for the reaction:Zn(s)+AgCl(aq)→ZnCl2(aq)+2Ag(s) is −218 kJ mol−1 while the EMF of the cell was 1.015 V.(∂E∂T)P of the cell is
Answer» At 300 K, $Δ H$ for the reaction: $Z n (s) + A g C l (a q) \to Z n C l_{2} (a q) + 2 A g (s)$ is $- 218 k J m o l^{- 1}$ while the EMF of the cell was $1.015 V$ . ${(\frac{\partial E}{\partial T})}_{P}$ of the cell is

Discussion

26.	18. What are the total isomers for C2ClFBrI (1)2 (2)4 (3)6 (4)5
Answer» 18. What are the total isomers for C2ClFBrI (1)2 (2)4 (3)6 (4)5

Discussion

27.	In which of following molecules, π - electron density in ring is minimum?
Answer» In which of following molecules, $π$ - electron density in ring is minimum?

Discussion

28.	what is the order of thermal stability of halide of alkali meta
Answer» what is the order of thermal stability of halide of alkali meta

Discussion

29.	Iodoethane is treated with Alcoholic KCN and the product obtained is hydrolysed with dil. HCl. The final product is
Answer» Iodoethane is treated with Alcoholic KCN and the product obtained is hydrolysed with dil. HCl. The final product is

Discussion

30.	Ram has a metallic ball. Which of the following is true with respect to this metallic ball?
Answer» Ram has a metallic ball. Which of the following is true with respect to this metallic ball?

Discussion

31.	What is perpendicular distance? Also tell in case of incircle.
Answer» What is perpendicular distance? Also tell in case of incircle.

Discussion

32.	The amount of hydrogen peroxide in 1L of 1.5N hydrogen peroxide solution is (1) 2.5g (2) 25.5g (3) 3.0 (4) 8.0
Answer» The amount of hydrogen peroxide in 1L of 1.5N hydrogen peroxide solution is (1) 2.5g (2) 25.5g (3) 3.0 (4) 8.0

Discussion

33.	the total KE In joules of molecules in 4 gram of methane at 27^° C
Answer» the total KE In joules of molecules in 4 gram of methane at 27^° C

Discussion

34.	What is free electrons
Answer» What is free electrons

Discussion

35.	Two solution, A and B, each of 100L was made by dissolving 4g of NaOH and 9.8g of H2SO4 in water, respectively. The pH of the resultant solution obtained from mixing 40L of solution A and 10L of solution B is______.
Answer» Two solution, $A$ and $B$ , each of $100 L$ was made by dissolving $4 g$ of $N a O H$ and $9.8 g$ of $H_{2} S O_{4}$ in water, respectively. The $p H$ of the resultant solution obtained from mixing $40 L$ of solution $A$ and $10 L$ of solution $B$ is______.

Discussion

36.	41. Draw all resonatic structure of Azide ion
Answer» 41. Draw all resonatic structure of Azide ion

Discussion

37.	One mole of an ideal gas at temperature T1 expands according to the law PV2=a (constant). The work done by the gas till temperature of gas becomes T2 is
Answer» One mole of an ideal gas at temperature $T_{1}$ expands according to the law $\frac{P}{V^{2}} = a$ (constant). The work done by the gas till temperature of gas becomes $T_{2}$ is

Discussion

38.	The correct order of C - O bond length among CO,CO2−3,CO2 is:
Answer» The correct order of C - O bond length among $C O, C O_{3}^{2 -}, C O_{2}$ is:

Discussion

39.	Why sulphonation of benzene shows kinetic isotopic effect?
Answer» Why sulphonation of benzene shows kinetic isotopic effect?

Discussion

40.	1g of a mixture NaCl and NaBr are reacted with H2SO4 and whole is converted into Na2SO4.The weight of Na2SO4 is found to be 2g. Find out the % of NaCl and NaBr in the mixture
Answer» 1g of a mixture NaCl and NaBr are reacted with H2SO4 and whole is converted into Na2SO4.The weight of Na2SO4 is found to be 2g. Find out the % of NaCl and NaBr in the mixture

Discussion

41.	The energy of combustion of propane (C3H8) gas in terms of given data is:Bond energy (kJ/mol)ϵC−HϵO=OϵC=OϵO−HϵC−C+x1+x2+x3+x4+x5Resonance energy of CO2 is −z kJ/mol and △Hvaporization[H2O] is y kJ/mol
Answer» The energy of combustion of propane $(C_{3} H_{8})$ gas in terms of given data is: Bond energy (kJ/mol) $\begin{matrix} ϵ_{C - H} & ϵ_{O = O} & ϵ_{C = O} & ϵ_{O - H} & ϵ_{C - C} + x_{1} & + x_{2} & + x_{3} & + x_{4} & + x_{5} \end{matrix}$ Resonance energy of $C O_{2}$ is $- z k J / m o l$ and $△ H_{v a p o r i z a t i o n} [H_{2} O] i s y k J / m o l$

Discussion

42.	When 2- methylbutane is treated with Br2 in presence of light, the total number of monobrominated compounds (including stereoisomers) obtained is-(1) 4 (2) 5 (3) 6 (4) 7
Answer» When 2- methylbutane is treated with Br2 in presence of light, the total number of monobrominated compounds (including stereoisomers) obtained is- (1) 4 (2) 5 (3) 6 (4) 7

Discussion

43.	What is the product?
Answer» What is the product?

Discussion

44.	Which of the following reactions give resolvable products?
Answer» Which of the following reactions give resolvable products?

Discussion

45.	Which has more hydration energy? MgSO4 or Ba(SO4
Answer» Which has more hydration energy? $M g S O_{4}$ or $B a (S O_{4}$

Discussion

46.	The atom having the valence shell electronic configuration 4s2 4p2 would be in
Answer» The atom having the valence shell electronic configuration $4 s^{2} 4 p^{2}$ would be in

Discussion

47.	In the reaction: 2X+B2H6→[BH2X2]+[BH4]− X can be:
Answer» In the reaction: $2 X + B_{2} H_{6} \to [B H_{2} X_{2}]^{+} [B H_{4}]^{-}$ X can be:

Discussion

48.	Correct order of bond length among the following is(1) C O> C = C > C = N2 C = O > C = N > C = C(3) C = C >C = N > C = O4) C = N >C C >C = O and why expl
Answer» Correct order of bond length among the following is(1) C O> C = C > C = N2 C = O > C = N > C = C(3) C = C >C = N > C = O4) C = N >C C >C = O and why expl

Discussion

49.	Arrange the given fractions in ascending order.
Answer» Arrange the given fractions in ascending order.

Discussion

50.	An electron in an atom jumps in such a way that its kinetic energy changes from x to x/4. The changes in its potential enegy will b?
Answer» An electron in an atom jumps in such a way that its kinetic energy changes from x to x/4. The changes in its potential enegy will b?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Combustion of some amount of ethylene, 6235 kJ heat was evolved. The heat of combustion of 1 mole of ethylene is 1511 kJ, What will be the volume of O2 (at NTP) that entered into the reaction is?

Which of the following atom in their ground state has maximum electron that has n+l+m=31) Zn 2)Mn 3)Sc d)P

Calculate [OH−] of a 0.01 M solution of ammonium hydroxide. The ionization constant for NH4OH (kb)=1.6×10−5 (Take log2=0.30)

Which of the following combinations contains only isoelectronic species?

how many molucle of Na in NaCl compound?

Tautomerism is not exhibited by

Give reactions to convert benzene to 1. Hexan1,6-dioic acid 2. Cyclopen†an one 3. Cyclopen†an e 4. Bromo cyclo pen†an e 5. Cyclopentene 6. Pentan1,5-dioic acid 7. Cyclobu†an one 8. Cyclobuta

What is the IUPAC name of the simplest bicyclo compound?

Illustration: The mass of a box is 2.3 kg. Two marbles of masses 2.15 g and 12.39 g are added to it. Find the total mass of the box to the correct number of significant figures.

In allene (C3H4), the types(s) of hydridisation of the carbon atoms is (are)

Which of the following cleavage of bond can result in Homolytic Cleavage?

A radioactive sample decays by 63% in 10 seconds. Time taken by it to decay by 50% in seconds is [Take ln(2) = 0.693] (Write upto two digits after the decimal point.)

12.What is the difference between gravitational potential energy and gravitational potential??

Mole fraction of solvent in aqueous solution of NaOH having molality of 3 is ?

Calculate the osmotic pressure of 5%solution of cane sugar at 300K.

Dry air was passed through a beaker solution containing 15 g of solute and 120 g of water. Then, it passed through a beaker containing pure water solvent. Loss in weight of the solution beaker was 2 g and loss in weight of solvent beaker was 0.05 g. What is the molecular weight of the solute ?

Which of the following shows:-Highest interpartical spacesHighest interpartical force of attractionDensity Arrangement of particlesHighest Kinetic energyShape and volumeHighest compressibilityMelting and boiling pointDiffusionBetween solid,liquid,gas,plasma,BEC in tabular form

The ratio of radii of first Bohr orbits of He+, Li2+ and Be3+ is:

How does chemical equilibrium is important for numerous biological and environmental processes explain in detail

59 Which of the following undergoes hydrolysis at faster rate and why? 1) CH3-CHCl-CH3 2) CH3-CH(CH3)-CH2Cl

The addition of HBr is easiest with(1) CH2=CH-Cl (2) Cl-CH=CH-Cl(3) CH3-CH=CH2 (4) (CH3)2C=CH2

what is the electric potential at the surface of the gold nucleus? the nuclear radius is 6.6*10 to the power -15 m and the atomic numbe of gold, Z=79

8. What is the IUPAC name of (CH3CH2)2NCH3

At 300 K, ΔH for the reaction:Zn(s)+AgCl(aq)→ZnCl2(aq)+2Ag(s) is −218 kJ mol−1 while the EMF of the cell was 1.015 V.(∂E∂T)P of the cell is

18. What are the total isomers for C2ClFBrI (1)2 (2)4 (3)6 (4)5

In which of following molecules, π - electron density in ring is minimum?

what is the order of thermal stability of halide of alkali meta

Iodoethane is treated with Alcoholic KCN and the product obtained is hydrolysed with dil. HCl. The final product is

Ram has a metallic ball. Which of the following is true with respect to this metallic ball?

What is perpendicular distance? Also tell in case of incircle.

The amount of hydrogen peroxide in 1L of 1.5N hydrogen peroxide solution is (1) 2.5g (2) 25.5g (3) 3.0 (4) 8.0

the total KE In joules of molecules in 4 gram of methane at 27^° C

What is free electrons

Two solution, A and B, each of 100L was made by dissolving 4g of NaOH and 9.8g of H2SO4 in water, respectively. The pH of the resultant solution obtained from mixing 40L of solution A and 10L of solution B is______.

41. Draw all resonatic structure of Azide ion

One mole of an ideal gas at temperature T1 expands according to the law PV2=a (constant). The work done by the gas till temperature of gas becomes T2 is

The correct order of C - O bond length among CO,CO2−3,CO2 is:

Why sulphonation of benzene shows kinetic isotopic effect?

1g of a mixture NaCl and NaBr are reacted with H2SO4 and whole is converted into Na2SO4.The weight of Na2SO4 is found to be 2g. Find out the % of NaCl and NaBr in the mixture

The energy of combustion of propane (C3H8) gas in terms of given data is:Bond energy (kJ/mol)ϵC−HϵO=OϵC=OϵO−HϵC−C+x1+x2+x3+x4+x5Resonance energy of CO2 is −z kJ/mol and △Hvaporization[H2O] is y kJ/mol

When 2- methylbutane is treated with Br2 in presence of light, the total number of monobrominated compounds (including stereoisomers) obtained is-(1) 4 (2) 5 (3) 6 (4) 7

What is the product?

Which of the following reactions give resolvable products?

Which has more hydration energy? MgSO4 or Ba(SO4

The atom having the valence shell electronic configuration 4s2 4p2 would be in

In the reaction: 2X+B2H6→[BH2X2]+[BH4]− X can be:

Correct order of bond length among the following is(1) C O> C = C > C = N2 C = O > C = N > C = C(3) C = C >C = N > C = O4) C = N >C C >C = O and why expl

Arrange the given fractions in ascending order.

An electron in an atom jumps in such a way that its kinetic energy changes from x to x/4. The changes in its potential enegy will b?