46295 + Interview Questions in Chemistry

1.	What is Zaitsev Rule
Answer» What is Zaitsev Rule

Discussion

2.	Which of the following will exhibit metamerism?
Answer» Which of the following will exhibit metamerism?

Discussion

3.	Which of the following synthesis gives 3-Methylhexan-1-ol?
Answer» Which of the following synthesis gives 3-Methylhexan-1-ol?

Discussion

4.	ALCOHOLS, PHENOLS, ETHERS Which one is stronger acid among the following A. Ortho fluoro phenol B. Para fluoro phenol
Answer» ALCOHOLS, PHENOLS, ETHERS Which one is stronger acid among the following A. Ortho fluoro phenol B. Para fluoro phenol

Discussion

5.	Which one of the following is a secondary alcohol?2-methyl-2-propanol1-propanol1-butanol2-pentanol
Answer» Which one of the following is a secondary alcohol? $2 - methyl - 2 - propanol$ $1 - propanol$ $1 - butanol$ $2 - pentanol$

5.

Which one of the following is a secondary alcohol?2-methyl-2-propanol1-propanol1-butanol2-pentanol

Answer»

Which one of the following is a secondary alcohol?

$2 - methyl - 2 - propanol$
$1 - propanol$
$1 - butanol$
$2 - pentanol$

Discussion

6.	Two kg of water is converted into steam by boiling at atmospheric pressure. The volume changes from 2×10−3m3 to 3.34m3 The work done by the system is about
Answer» Two kg of water is converted into steam by boiling at atmospheric pressure. The volume changes from $2 \times 10^{- 3} m^{3}$ to $3.34 m^{3}$ The work done by the system is about

Discussion

7.	To measure the quantity of MnCl2 dissolved in an aqueous solution, it was completely converted to KMnO4 using the reaction, MnCl2+K2S2O8+H2O→KMnO4+H2SO4+HCl (equation not balanced). Few drops of concentrated HCl were added to this solution and gently warmed. Further, oxalic acid (225 mg) was added in portions till the colour of the permanganate ion disappeared. The quantity of MnCl2 (in mg) present in the initial solution is (Given atomic weights in gmol−1 Mn=55,Cl=35.5)
Answer» To measure the quantity of $M n C l_{2}$ dissolved in an aqueous solution, it was completely converted to $K M n O_{4}$ using the reaction, $M n C l_{2} + K_{2} S_{2} O_{8} + H_{2} O \to K M n O_{4} + H_{2} S O_{4} + H C l$ (equation not balanced). Few drops of concentrated HCl were added to this solution and gently warmed. Further, oxalic acid (225 mg) was added in portions till the colour of the permanganate ion disappeared. The quantity of $M n C l_{2}$ (in mg) present in the initial solution is (Given atomic weights in $g m o l^{- 1}$ Mn=55,Cl=35.5)

Discussion

8.	What is the amount of charge possessed by 1 Kg of electrons?a. 1.7610^11b. 1.7610^-9c. 1.7610^-7d. 1.7610^-5
Answer» What is the amount of charge possessed by 1 Kg of electrons? a. 1.7610^11 b. 1.7610^-9 c. 1.7610^-7 d. 1.7610^-5

Discussion

9.	What is the difference between melting and liquefication of elements? As noble elements posses weak van der Waal's forces of attraction between them so it is easy to break bond so according to collision theory , for product formation breaking of bond is necessary , as it is easy to brake bonds of noble elements still they don't form any compound. There are only few compounds are present. Why is it so?
Answer» What is the difference between melting and liquefication of elements? As noble elements posses weak van der Waal's forces of attraction between them so it is easy to break bond so according to collision theory , for product formation breaking of bond is necessary , as it is easy to brake bonds of noble elements still they don't form any compound. There are only few compounds are present. Why is it so?

Discussion

10.	Why the electron gain enthalpy of alkali metals is negative
Answer» Why the electron gain enthalpy of alkali metals is negative

Discussion

11.	The gas evolved when methylamine reacts with nitrous acid is:
Answer» The gas evolved when methylamine reacts with nitrous acid is:

Discussion

12.	Convert aniline to anthranilic acid.
Answer» Convert aniline to anthranilic acid.

Discussion

13.	13. A current of dry air was passed through a solution of 2.5 g of a non volatile solution in 100 g of water and through water alone . The Loss in the weight of solution was 1.25 g and that of water was 0.005 g. calculate the molecular mass of solute.
Answer» 13. A current of dry air was passed through a solution of 2.5 g of a non volatile solution in 100 g of water and through water alone . The Loss in the weight of solution was 1.25 g and that of water was 0.005 g. calculate the molecular mass of solute.

Discussion

14.	7. What are the conditions for a secondary halide to undergo substitution or elimination??
Answer» 7. What are the conditions for a secondary halide to undergo substitution or elimination??

Discussion

15.	Which one of the following has the highest bond energy?
Answer» Which one of the following has the highest bond energy?

Discussion

16.	50 A complex containing K+, Pt(IV), and Cl- is 100%ionised giving i=3 thus,possible Complex is 1)K2[Pt Cl4] 2)K2[PtCl6] 3)K3[Pt Cl5] 4)K[Pt Cl3]
Answer» 50 A complex containing K+, Pt(IV), and Cl- is 100%ionised giving i=3 thus,possible Complex is 1)K2[Pt Cl4] 2)K2[PtCl6] 3)K3[Pt Cl5] 4)K[Pt Cl3]

Discussion

17.	Enthalpiesof formation of CO(g),CO2(g),N2O(g)andN2O4(g)are–110 kJ mol–1,– 393 kJ mol–1,81 kJ mol–1and 9.7 kJ mol–1respectively. Find the value of ΔrHforthe reaction:N2O4(g)+ 3CO(g)N2O(g)+ 3CO2(g)
Answer» Enthalpies of formation of CO₍_g_),CO₂₍_g_),N₂O₍_g₎and N₂O₄₍_g₎are –110 kJ mol^–1, – 393 kJ mol^–1, 81 kJ mol^–1 and 9.7 kJ mol^–1 respectively. Find the value of Δ_rH for the reaction: N₂O₄₍_g₎ + 3CO₍_g₎ N₂O₍_g₎ + 3CO₂₍_g₎

17.

Enthalpiesof formation of CO(g),CO2(g),N2O(g)andN2O4(g)are–110 kJ mol–1,– 393 kJ mol–1,81 kJ mol–1and 9.7 kJ mol–1respectively. Find the value of ΔrHforthe reaction:N2O4(g)+ 3CO(g)N2O(g)+ 3CO2(g)

Answer»

Enthalpies
of formation of CO₍_g_),CO₂₍_g_),N₂O₍_g₎and
N₂O₄₍_g₎are
–110 kJ mol^–1,
– 393 kJ mol^–1,
81 kJ mol^–1
and 9.7 kJ mol^–1
respectively. Find the value of Δ_rH
for
the reaction:

N₂O₄₍_g₎
+ 3CO₍_g₎

N₂O₍_g₎
+ 3CO₂₍_g₎

Discussion

18.	ColloidsTypei. Milkp. Solid solii. Milky glassq. Emulsioniii. Milk of magnesiar. SolFind the correct match.
Answer» $\begin{matrix} Colloids & Type i. Milk & p. Solid sol ii. Milky glass & q. Emulsion iii. Milk of magnesia & r. Sol \end{matrix}$ Find the correct match.

Discussion

19.	After 2hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed.The half-life of the isotope is
Answer» After 2hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed.The half-life of the isotope is

Discussion

20.	49.A closed cylinder vessel contains N moles of an ideal diatomic gas at temperature T . On supplying heat , temperature remains same , but n moles get dissociated into atoms . What is the Heat supplied?
Answer» 49.A closed cylinder vessel contains N moles of an ideal diatomic gas at temperature T . On supplying heat , temperature remains same , but n moles get dissociated into atoms . What is the Heat supplied?

Discussion

21.	What do the following symbols [or formula] denote : 2H ; H2 ; H+
Answer» What do the following symbols [or formula] denote : $2H$ ; $H_{2}$ ; $H^{+}$

Discussion

22.	Nitric acid is the most important oxi-acid formed by nitrogen. It is one of the major industrial chemicals and is widely used. Nitric acid is manufactured by the catalytic oxidation of ammonia that is known as Ostwald Process which can be represented by sequence of reactions shown below4NH3+5O2(g)Catalyst−−−−−→Pt/Rh4NO(g)+6H2O(g) ...(i)2NO(g)+O2(g)1120 K−−−−→2NO2(g) ...(ii) 3NO2(g)+H2O(l)→2HNO3(aq)+NO(g) ...(iii)The aqueous nitric acid obtained by this method can be concenteated by distillation to 68.5% by weight. Further concentration to 98% acid can be achieved by dehydration with concentrated sulphuric acid.If 170 kg of NH3 is heated in excess of oxygen, then the volume of H2O(l) produced in 1st reaction at STP is (Given that density of water is 1gml)
Answer» Nitric acid is the most important oxi-acid formed by nitrogen. It is one of the major industrial chemicals and is widely used. Nitric acid is manufactured by the catalytic oxidation of ammonia that is known as Ostwald Process which can be represented by sequence of reactions shown below $4 N H_{3} + 5 O_{2} (g) C a t a l y s t - ---- \to P t / R h 4 N O (g) + 6 H_{2} O (g) . . . (i)$ $2 N O (g) + O_{2} (g) 1120 K - --- \to 2 N O_{2} (g) . . . (i i)$ $3 N O_{2} (g) + H_{2} O (l) \to 2 H N O_{3} (a q) + N O (g) . . . (i i i)$ The aqueous nitric acid obtained by this method can be concenteated by distillation to $68.5 %$ by weight. Further concentration to $98 %$ acid can be achieved by dehydration with concentrated sulphuric acid. If $170 k g$ of $N H_{3}$ is heated in excess of oxygen, then the volume of $H_{2} O (l)$ produced in $1^{s t}$ reaction at STP is (Given that density of water is $1 \frac{g}{m l}$ )

Discussion

23.	Oxidation state of Fe in Fe3O4 is 8/3. What about the oxidation no. of Fe in Fe3O4?
Answer» Oxidation state of Fe in Fe3O4 is 8/3. What about the oxidation no. of Fe in Fe3O4?

Discussion

24.	If 2g of carbon is burnt in the presence of 32g of oxygen. What is the amount of carbon dioxide formed?
Answer» If 2g of carbon is burnt in the presence of 32g of oxygen. What is the amount of carbon dioxide formed?

Discussion

25.	Carbon tetrachloride (CCl4) is mixed in 390 g of benzene to make a solution for supporting an organic chemical reaction in which mole fraction of benzene is 0.91. Find the molality of the CCl4 solution.
Answer» Carbon tetrachloride $(C C l_{4})$ is mixed in $390 g$ of benzene to make a solution for supporting an organic chemical reaction in which mole fraction of benzene is $0.91$ . Find the molality of the $C C l_{4}$ solution.

Discussion

26.	Which of the following has the highest melting point?
Answer» Which of the following has the highest melting point?

Discussion

27.	Which of thefollowing has the maximum number of unpaired electrons?
Answer» Which of the following has the maximum number of unpaired electrons?

Discussion

28.	For the reaction, N2(g)+O2(g)⇋2NO(g), the value of Kc at 300∘ C is 0.1. When the equilibrium concentrations of both the reactants is 0.5 mol, what is the value of Kp at the same temperature?
Answer» For the reaction, $N_{2} (g) + O_{2} (g) ⇋ 2 N O (g)$ , the value of $K_{c}$ at $300^{\circ} C$ is $0.1$ . When the equilibrium concentrations of both the reactants is $0.5 mol$ , what is the value of $K_{p}$ at the same temperature?

Discussion

29.	8. what will be magnetic moment of [FeF6] 3- in bohr magneton
Answer» 8. what will be magnetic moment of [FeF6] 3- in bohr magneton

Discussion

30.	9. 0.21 gm of but 3 yne 2 ol is treated with excess of C2H5MgBr at standard conditions. The volume of gas evolved is 1134.4 ml 2146.4 ml 3 67.2 ml 4 73.2 ml
Answer» 9. 0.21 gm of but 3 yne 2 ol is treated with excess of C2H5MgBr at standard conditions. The volume of gas evolved is 1134.4 ml 2146.4 ml 3 67.2 ml 4 73.2 ml

Discussion

31.	Correct IUPAC name of the following compound is
Answer» Correct IUPAC name of the following compound is

31.

Correct IUPAC name of the following compound is

Answer»

Correct IUPAC name of the following compound is

Discussion

32.	is intermolecular reaction same as combination redox reaction?Is decomposition redox reaction same as intramolecular reaction?
Answer» is intermolecular reaction same as combination redox reaction?Is decomposition redox reaction same as intramolecular reaction?

Discussion

33.	When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:
Answer» When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:

33.

When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:

Answer»

When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:

Discussion

34.	What is the graphical representation of energy of electron and atomic number (Z^2
Answer» What is the graphical representation of energy of electron and atomic number (Z^2

Discussion

35.	A proton ,a deutron and a alpha particle accelerated through the same potential difference enter a region of uniform magnetic field moving at right angles to it what is the ratio of their kinetic energy
Answer» A proton ,a deutron and a alpha particle accelerated through the same potential difference enter a region of uniform magnetic field moving at right angles to it what is the ratio of their kinetic energy

Discussion

36.	the molecular speed of gaseous molecules are ana\log ues to thosr of rifle bullets; why is then odour of the gaseous molecules not detected so fast?
Answer» the molecular speed of gaseous molecules are ana\log ues to thosr of rifle bullets; why is then odour of the gaseous molecules not detected so fast?

Discussion

37.	If the bond length and dipole moment of a diatomic molecule are 1.25 Å and 1.0 D respectively, what is the percent ionic character of the bond?
Answer» If the bond length and dipole moment of a diatomic molecule are 1.25 Å and 1.0 D respectively, what is the percent ionic character of the bond?

Discussion

38.	Hydroboration-oxidation of CH3CH=CH2 gives:
Answer» Hydroboration-oxidation of $C H_{3} C H = C H_{2}$ gives:

Discussion

39.	11 IS NITRONIUM ION A COVALENT COMPOUND OR IONIC AND WHY DOES IT ACT AS A ELECTROPHILE
Answer» 11 IS NITRONIUM ION A COVALENT COMPOUND OR IONIC AND WHY DOES IT ACT AS A ELECTROPHILE

Discussion

40.	3 What is the major product when CH3 - CH(Br) - CH(CH3) - CH3 is treated with Sodium ethoxide?
Answer» 3 What is the major product when CH3 - CH(Br) - CH(CH3) - CH3 is treated with Sodium ethoxide?

Discussion

41.	33 The number of carbon atoms and degree of unsaturation in allyl vinyl acetylene is? And how
Answer» 33 The number of carbon atoms and degree of unsaturation in allyl vinyl acetylene is? And how

Discussion

42.	1 kg of a gas does 20 kJ of work and receives 16 kJ of heat when it is expanded between two states. A second kind of expansion can be found between the same initial and final state, which requires a heat input of 9 kJ. The work done by the gas in the second expansion is:
Answer» $1 kg$ of a gas does $20 kJ$ of work and receives $16 kJ$ of heat when it is expanded between two states. A second kind of expansion can be found between the same initial and final state, which requires a heat input of $9 kJ$ . The work done by the gas in the second expansion is:

Discussion

43.	what is crystal field theory?
Answer» what is crystal field theory?

Discussion

44.	Which of the following processes absorb energy?
Answer» Which of the following processes absorb energy?

Discussion

45.	why is tetrahydrofuran not an aromatic compound
Answer» why is tetrahydrofuran not an aromatic compound

Discussion

46.	400 mg of calcium atoms are removed from 0.1 mol of calcium and the remaining amount is allowed to react with oxygen. How many oxygen atoms are involved in the formation of calcium oxide? \lbrack N = 6 x 10 \rbrack
Answer» 400 mg of calcium atoms are removed from 0.1 mol of calcium and the remaining amount is allowed to react with oxygen. How many oxygen atoms are involved in the formation of calcium oxide? \lbrack N = 6 x 10 \rbrack

Discussion

47.	35. The concentration of two dilute solutions of HCl , that is 'A' and 'B' are 0.01 M and 0.0001 M. The ratio of pH of solution 'A' to that of solution 'B' is ? (1) 1 : 2 (2) 3 : 4 (3) 2 : 7 (4) 4 : 8
Answer» 35. The concentration of two dilute solutions of HCl , that is 'A' and 'B' are 0.01 M and 0.0001 M. The ratio of pH of solution 'A' to that of solution 'B' is ? (1) 1 : 2 (2) 3 : 4 (3) 2 : 7 (4) 4 : 8

Discussion

48.	Number of spectral lines in Balmer series when anelectron return from 7th orbit to 1st orbit ofhydrogen atom are
Answer» Number of spectral lines in Balmer series when anelectron return from 7th orbit to 1st orbit ofhydrogen atom are

Discussion

49.	20.Relation between frequency and energy
Answer» 20.Relation between frequency and energy

Discussion

50.	In diffusion when equilibrium is obtained there is no net movement of particles but they move around freely in their position . Explain the statement.
Answer» In diffusion when equilibrium is obtained there is no net movement of particles but they move around freely in their position . Explain the statement.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is Zaitsev Rule

Which of the following will exhibit metamerism?

Which of the following synthesis gives 3-Methylhexan-1-ol?

ALCOHOLS, PHENOLS, ETHERS Which one is stronger acid among the following A. Ortho fluoro phenol B. Para fluoro phenol

Which one of the following is a secondary alcohol?2-methyl-2-propanol1-propanol1-butanol2-pentanol

Two kg of water is converted into steam by boiling at atmospheric pressure. The volume changes from 2×10−3m3 to 3.34m3 The work done by the system is about

What is the amount of charge possessed by 1 Kg of electrons?a. 1.76*10^11b. 1.76*10^-9c. 1.76*10^-7d. 1.76*10^-5

Why the electron gain enthalpy of alkali metals is negative

The gas evolved when methylamine reacts with nitrous acid is:

Convert aniline to anthranilic acid.

13. A current of dry air was passed through a solution of 2.5 g of a non volatile solution in 100 g of water and through water alone . The Loss in the weight of solution was 1.25 g and that of water was 0.005 g. calculate the molecular mass of solute.

7. What are the conditions for a secondary halide to undergo substitution or elimination??

Which one of the following has the highest bond energy?

50 A complex containing K+, Pt(IV), and Cl- is 100%ionised giving i=3 thus,possible Complex is 1)K2[Pt Cl4] 2)K2[PtCl6] 3)K3[Pt Cl5] 4)K[Pt Cl3]

Enthalpiesof formation of CO(g),CO2(g),N2O(g)andN2O4(g)are–110 kJ mol–1,– 393 kJ mol–1,81 kJ mol–1and 9.7 kJ mol–1respectively. Find the value of ΔrHforthe reaction:N2O4(g)+ 3CO(g)N2O(g)+ 3CO2(g)

ColloidsTypei. Milkp. Solid solii. Milky glassq. Emulsioniii. Milk of magnesiar. SolFind the correct match.

After 2hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed.The half-life of the isotope is

49.A closed cylinder vessel contains N moles of an ideal diatomic gas at temperature T . On supplying heat , temperature remains same , but n moles get dissociated into atoms . What is the Heat supplied?

What do the following symbols [or formula] denote : 2H ; H2 ; H+

Oxidation state of Fe in Fe3O4 is 8/3. What about the oxidation no. of Fe in Fe3O4?

If 2g of carbon is burnt in the presence of 32g of oxygen. What is the amount of carbon dioxide formed?

Carbon tetrachloride (CCl4) is mixed in 390 g of benzene to make a solution for supporting an organic chemical reaction in which mole fraction of benzene is 0.91. Find the molality of the CCl4 solution.

Which of the following has the highest melting point?

Which of thefollowing has the maximum number of unpaired electrons?

For the reaction, N2(g)+O2(g)⇋2NO(g), the value of Kc at 300∘ C is 0.1. When the equilibrium concentrations of both the reactants is 0.5 mol, what is the value of Kp at the same temperature?

8. what will be magnetic moment of [FeF6] 3- in bohr magneton

9. 0.21 gm of but 3 yne 2 ol is treated with excess of C2H5MgBr at standard conditions. The volume of gas evolved is 1134.4 ml 2146.4 ml 3 67.2 ml 4 73.2 ml

Correct IUPAC name of the following compound is

is intermolecular reaction same as combination redox reaction?Is decomposition redox reaction same as intramolecular reaction?

When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:

What is the graphical representation of energy of electron and atomic number (Z^2

A proton ,a deutron and a alpha particle accelerated through the same potential difference enter a region of uniform magnetic field moving at right angles to it what is the ratio of their kinetic energy

the molecular speed of gaseous molecules are ana\log ues to thosr of rifle bullets; why is then odour of the gaseous molecules not detected so fast?

If the bond length and dipole moment of a diatomic molecule are 1.25 Å and 1.0 D respectively, what is the percent ionic character of the bond?

Hydroboration-oxidation of CH3CH=CH2 gives:

11 IS NITRONIUM ION A COVALENT COMPOUND OR IONIC AND WHY DOES IT ACT AS A ELECTROPHILE

3 What is the major product when CH3 - CH(Br) - CH(CH3) - CH3 is treated with Sodium ethoxide?

33 The number of carbon atoms and degree of unsaturation in allyl vinyl acetylene is? And how

1 kg of a gas does 20 kJ of work and receives 16 kJ of heat when it is expanded between two states. A second kind of expansion can be found between the same initial and final state, which requires a heat input of 9 kJ. The work done by the gas in the second expansion is:

what is crystal field theory?

Which of the following processes absorb energy?

why is tetrahydrofuran not an aromatic compound

400 mg of calcium atoms are removed from 0.1 mol of calcium and the remaining amount is allowed to react with oxygen. How many oxygen atoms are involved in the formation of calcium oxide? \lbrack N = 6 x 10 \rbrack

35. The concentration of two dilute solutions of HCl , that is 'A' and 'B' are 0.01 M and 0.0001 M. The ratio of pH of solution 'A' to that of solution 'B' is ? (1) 1 : 2 (2) 3 : 4 (3) 2 : 7 (4) 4 : 8

Number of spectral lines in Balmer series when anelectron return from 7th orbit to 1st orbit ofhydrogen atom are

20.Relation between frequency and energy

In diffusion when equilibrium is obtained there is no net movement of particles but they move around freely in their position . Explain the statement.

What is the amount of charge possessed by 1 Kg of electrons?a. 1.7610^11b. 1.7610^-9c. 1.7610^-7d. 1.7610^-5