46295 + Interview Questions in Chemistry

1.	Consider the reaction ph-co-och3___________+ch3mgbr+H3o+
Answer» Consider the reaction ph-co-och3___________+ch3mgbr+H3o+

Discussion

2.	hydrolysis of ch3cooNa increase when it is mixed with the solution of (1) ch3cooh (2) Naoh (3) hcl (4) Nh4o
Answer» hydrolysis of ch3cooNa increase when it is mixed with the solution of (1) ch3cooh (2) Naoh (3) hcl (4) Nh4o

Discussion

3.	In which of the following, dissociation of NH4OH will be minimised
Answer» In which of the following, dissociation of $N H_{4} O H$ will be minimised

Discussion

4.	what is cannizzaro reaction?
Answer» what is cannizzaro reaction?

Discussion

5.	Why does the boundary between liquid phase and gaseous phase disppear on heating a liquid upto critical temperature in a closed vessel ? In this situation what will be the state of the substance?
Answer» Why does the boundary between liquid phase and gaseous phase disppear on heating a liquid upto critical temperature in a closed vessel ? In this situation what will be the state of the substance?

Discussion

6.	The increasing order of acidic nature of the following oxides is
Answer» The increasing order of acidic nature of the following oxides is

Discussion

7.	Explain the difference between molarity and molality.
Answer» Explain the difference between molarity and molality.

Discussion

8.	1,2-Dihydroxybenzene(I) 1,3-Dihydroxybenzene(II)1,4-Dihydroxybenzene(III) Hydroxybenzene(IV)The increasing order of boiling points of the above alcohols is:
Answer» $1,2-Dihydroxybenzene (I) 1,3-Dihydroxybenzene (I I)$ $1,4-Dihydroxybenzene (I I I) Hydroxybenzene (I V)$ The increasing order of boiling points of the above alcohols is:

Discussion

9.	how many milligr^{}am of iron(fe^{+2}) are equal to 1ml of 0.1055N k_2Cr_2O_7 equivalent
Answer» how many milligr^{}am of iron(fe^{+2}) are equal to 1ml of 0.1055N k_2Cr_2O_7 equivalent

Discussion

10.	Determine the wavelength of the first Lyman line, the transition from n=2 to n=1.
Answer» Determine the wavelength of the first Lyman line, the transition from $n = 2$ to $n = 1$ .

Discussion

11.	Q 33/75 Which among the following has highest number of atoms? 5 g of CO 24g of CO 1g of H 26g of O3
Answer» Q 33/75 Which among the following has highest number of atoms? 5 g of CO 24g of CO 1g of H 26g of O3

Discussion

12.	Graphene is frequently in news recently. What is its importance? 1. It is a two-dimensional material and has good electrical conductivity. 2. It is one of the thinnest but strongest materials tested so far. 3. It is entirely made of silicon and has high optical transparency. 4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs. Which of the statements given above are correct?
Answer» Graphene is frequently in news recently. What is its importance? 1. It is a two-dimensional material and has good electrical conductivity. 2. It is one of the thinnest but strongest materials tested so far. 3. It is entirely made of silicon and has high optical transparency. 4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs. Which of the statements given above are correct?

12.

Graphene is frequently in news recently. What is its importance? 1. It is a two-dimensional material and has good electrical conductivity. 2. It is one of the thinnest but strongest materials tested so far. 3. It is entirely made of silicon and has high optical transparency. 4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs. Which of the statements given above are correct?

Answer»

Graphene is frequently in news recently. What is its importance?

1. It is a two-dimensional material and has good electrical conductivity.

2. It is one of the thinnest but strongest materials tested so far.

3. It is entirely made of silicon and has high optical transparency.

4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs.

Which of the statements given above are correct?

Discussion

13.	11.Temperature at which the root mean square velocity of Sulphur dioxide molecules is the same as that of oxygen at 27^° celsius is
Answer» 11.Temperature at which the root mean square velocity of Sulphur dioxide molecules is the same as that of oxygen at 27^° celsius is

Discussion

14.	An α−particle with kinetic energy 10 MeV is heading towards a stationary nucleus of atomic number 50. Calculate the distance of closest approach. Initially they were far apart.
Answer» An $α - particle$ with kinetic energy $10 MeV$ is heading towards a stationary nucleus of atomic number $50$ . Calculate the distance of closest approach. Initially they were far apart.

Discussion

15.	48. The rate constant for the forward and backward reactions of hydrolysis of ester are 0.011 and 0.0015. the equilibrium constant of the reaction is_
Answer» 48. The rate constant for the forward and backward reactions of hydrolysis of ester are 0.011 and 0.0015. the equilibrium constant of the reaction is_

Discussion

16.	Difference between conductivity and molar conductivity
Answer» Difference between conductivity and molar conductivity

Discussion

17.	The resistance of 0.01 N solution of an electrolyte is 210Ω at 298 K with a cell constant of 0.88cm−1. Calculate equivalent conductivity of the solution.
Answer» The resistance of 0.01 N solution of an electrolyte is $210 Ω$ at 298 K with a cell constant of $0.88 c m^{- 1}$ . Calculate equivalent conductivity of the solution.

Discussion

18.	One mole of butane is burnt in excess oxygen and the gas produced is allowed to pass through a 3 M lime water solution having 1 L volume producing CaCO3 and H2O. The mole(s) of CaCO3 produced are .
Answer» One mole of butane is burnt in excess oxygen and the gas produced is allowed to pass through a 3 M lime water solution having 1 L volume producing $C a C O_{3}$ and $H_{2} O$ . The mole(s) of $C a C O_{3}$ produced are .

Discussion

19.	A current of 2.0 A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At. wt. = 177). The oxidation state of the metal in the metal salt is:
Answer» A current of 2.0 A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At. wt. = 177). The oxidation state of the metal in the metal salt is:

Discussion

20.	Finkelstein reaction is
Answer» Finkelstein reaction is

Discussion

21.	xKMnO4+yK2C2O4+zH2SO4⟶aMnO4+bCO2+6K2SO4+8H2OHere x,y,z, a and b are respectively
Answer» $x K M n O_{4} + y K_{2} C_{2} O_{4} + z H_{2} S O_{4} ⟶ a M n O_{4} + b C O_{2} + 6 K_{2} S O_{4} + 8 H_{2} O$ Here x,y,z, a and b are respectively

21.

xKMnO4+yK2C2O4+zH2SO4⟶aMnO4+bCO2+6K2SO4+8H2OHere x,y,z, a and b are respectively

Answer»

$x K M n O_{4} + y K_{2} C_{2} O_{4} + z H_{2} S O_{4} ⟶ a M n O_{4} + b C O_{2} + 6 K_{2} S O_{4} + 8 H_{2} O$

Here x,y,z, a and b are respectively

Discussion

22.	Ether is obtained from ethyl alcohol in presence of H2SO4 at ?
Answer» Ether is obtained from ethyl alcohol in presence of $H_{2} S O_{4}$ at ?

Discussion

23.	The element whose electronic configuration is 1s2, 2s2, 2p6, 3s2 is a/an?
Answer» The element whose electronic configuration is $1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}$ is a/an?

Discussion

24.	In a cube of any crystal, A-atoms are placed at every corners and B-atoms are placed at every centre of face. The formula of compound is:
Answer» In a cube of any crystal, $A$ -atoms are placed at every corners and B-atoms are placed at every centre of face. The formula of compound is:

Discussion

25.	The wavelength of the first line of Balmer series is 6563 ˚A. The wavelength of the first line of Lyman series will be
Answer» The wavelength of the first line of Balmer series is $6563 ˚ A$ . The wavelength of the first line of Lyman series will be

Discussion

26.	Which one of the following pair of substances illustrate the law of multiple proportions?
Answer» Which one of the following pair of substances illustrate the law of multiple proportions?

Discussion

27.	out of Na+ , Na2+ , Na3+ , Na which is highly electronegative and why?
Answer» out of Na+ , Na2+ , Na3+ , Na which is highly electronegative and why?

Discussion

28.	Which of them is not equal to zero for an ideal solution?
Answer» Which of them is not equal to zero for an ideal solution?

Discussion

29.	55 In a reversible reaction, the forward reaction was 3 time faster than that of reverse reaction. The reaction quotient is _______
Answer» 55 In a reversible reaction, the forward reaction was 3 time faster than that of reverse reaction. The reaction quotient is _______

Discussion

30.	Write the name andstructure of one of the common initiators used in freeradical additionpolymerisation.
Answer» Write the name and structure of one of the common initiators used in free radical addition polymerisation.

30.

Write the name andstructure of one of the common initiators used in freeradical additionpolymerisation.

Answer»

Write the name and
structure of one of the common initiators used in free

radical addition
polymerisation.

Discussion

31.	Which one is the correct statement with reference to solubility of MgSO_4 in water: (1) Hydration energy of MgSO_4 is higher in comparison to its lattice energy (2) Ionic potential of Mg^{2+} is very low (3) SO_4^{2-} ion mainly contributes towards hydration energy (4) Size of Mg^{2+} and SO_4^{2-} are simila
Answer» Which one is the correct statement with reference to solubility of MgSO_4 in water: (1) Hydration energy of MgSO_4 is higher in comparison to its lattice energy (2) Ionic potential of Mg^{2+} is very low (3) SO_4^{2-} ion mainly contributes towards hydration energy (4) Size of Mg^{2+} and SO_4^{2-} are simila

Discussion

32.	Which of the following ion has maximum magnetic moment ? 1.Mn^{3+} 2.Cu^{2+} 3.Fe^{3+} 4.v^{3+} Also explain what is magnetic moment ?
Answer» Which of the following ion has maximum magnetic moment ? 1.Mn^{3+} 2.Cu^{2+} 3.Fe^{3+} 4.v^{3+} Also explain what is magnetic moment ?

Discussion

33.	Explain the following with suitabale examples : (i) Ferromagnetism (ii) Paramagnetism (iii) Ferrimagnetism (iv) Antiferromagnetism (v) 12-16 and 13-15 group compounds.
Answer» Explain the following with suitabale examples : (i) Ferromagnetism (ii) Paramagnetism (iii) Ferrimagnetism (iv) Antiferromagnetism (v) 12-16 and 13-15 group compounds.

33.

Explain the following with suitabale examples : (i) Ferromagnetism (ii) Paramagnetism (iii) Ferrimagnetism (iv) Antiferromagnetism (v) 12-16 and 13-15 group compounds.

Answer»

Explain the following with suitabale examples :

(i) Ferromagnetism

(ii) Paramagnetism

(iii) Ferrimagnetism

(iv) Antiferromagnetism

(v) 12-16 and 13-15 group compounds.

Discussion

34.	Which of the following equations depicts only the oxidizing nature of H2O2?
Answer» Which of the following equations depicts only the oxidizing nature of $H_{2} O_{2}$ ?

Discussion

35.	why alkyl halide on reaction with aqueous KOH give substitution reaction but on reacton with alcholicKOH give dehydro halogenation raaction why?
Answer» why alkyl halide on reaction with aqueous KOH give substitution reaction but on reacton with alcholicKOH give dehydro halogenation raaction why?

Discussion

36.	5. Determine the energy stored in the surfasoap bubble of radius 2.1 cm if its te4.5 x 10-2 Nm-1(1) 8 mJ(2) 2.46 mJ(3) 4.93 x 10-4 J(4) None of these
Answer» 5. Determine the energy stored in the surfasoap bubble of radius 2.1 cm if its te4.5 x 10-2 Nm-1(1) 8 mJ(2) 2.46 mJ(3) 4.93 x 10-4 J(4) None of these

Discussion

37.	Which of the following compound contain a carboxylic group ?
Answer» Which of the following compound contain a carboxylic group ?

Discussion

38.	Type of hybridization of complex (E) is:
Answer» Type of hybridization of complex $(E)$ is:

Discussion

39.	Tropylium carbanion and cyclo penta dienyl carbanion is non aromatic or antiaromatic ?
Answer» Tropylium carbanion and cyclo penta dienyl carbanion is non aromatic or antiaromatic ?

Discussion

40.	ntWhat is the mechanism of Birnbaum simonini reaction?n
Answer» ntWhat is the mechanism of Birnbaum simonini reaction?n

Discussion

41.	63. Complete combustion of 0.858 gram of compound X gives 2.63 gram of co2 and 1.28 gram of H2O the lowest molecular weight X can have
Answer» 63. Complete combustion of 0.858 gram of compound X gives 2.63 gram of co2 and 1.28 gram of H2O the lowest molecular weight X can have

Discussion

42.	Which of the following elements has a big jump from its IE1 to IE2?
Answer» Which of the following elements has a big jump from its $I E_{1}$ to $I E_{2}$ ?

Discussion

43.	What is Discrete Data?
Answer» What is Discrete Data?

Discussion

44.	How many litres of liquid ccl4 must be measured out of contain 1 into 10 raise to power 25 CL atoms
Answer» How many litres of liquid ccl4 must be measured out of contain 1 into 10 raise to power 25 CL atoms

Discussion

45.	sum of numbers from 1 to infinite
Answer» sum of numbers from 1 to infinite

Discussion

46.	An aqueous solution containing 0.10 g KIO3 (formula wt. = 214.0) was treated with an excess of KI solution. The solution was acidified with HCl. The liberated I2 consumed 55 mL of thiosulphate solution to decolorize the blue starch-iodine complex. Calculate molarity of the sodium thiosulphate solution.
Answer» An aqueous solution containing $0.10 g K I O_{3}$ (formula wt. = 214.0) was treated with an excess of $K I$ solution. The solution was acidified with $H C l .$ The liberated $I_{2}$ consumed $55 m L$ of thiosulphate solution to decolorize the blue starch-iodine complex. Calculate molarity of the sodium thiosulphate solution.

Discussion

47.	Nuclei of a radioactive element are being produced at a constant rate α. The element has a decay constant λ. At time t = 0, there are N0 nuclei of the element. The number N of nuclei at time t is
Answer» Nuclei of a radioactive element are being produced at a constant rate $α$ . The element has a decay constant $λ$ . At time t = 0, there are $N_{0}$ nuclei of the element. The number N of nuclei at time t is

47.

Nuclei of a radioactive element are being produced at a constant rate α. The element has a decay constant λ. At time t = 0, there are N0 nuclei of the element. The number N of nuclei at time t is

Answer»

Nuclei of a radioactive element are being produced at a constant rate $α$ . The element has a decay constant $λ$ . At time t = 0, there are $N_{0}$ nuclei of the element.

The number N of nuclei at time t is

Discussion

48.	Is everything matter?
Answer» Is everything matter?

Discussion

49.	A solution which is 10-3 M each in Mn2+, Fe2+, Zn2+ and Hg2+ is treated with 10-16 M sulphide ion. If Ksp of MnS, FeS, ZnS and HgS are 10-15, 10-23, 10-20 and 10-54 respectively, which one will precipitate first?
Answer» A solution which is 10^-3 M each in Mn²⁺, Fe²⁺, Zn²⁺ and Hg²⁺ is treated with 10^-16 M sulphide ion. If K_sp of MnS, FeS, ZnS and HgS are 10^-15, 10^-23, 10^-20 and 10^-54 respectively, which one will precipitate first?

Discussion

50.	From the following reaction sequenceCl2 + 2KOH → KCl + KClO + H2O3KClO → 2KCl + KClO34KClO3 → 3KClO4+KClCalculate the mass of chlorine needed to produce 23g of KClO4
Answer» From the following reaction sequence $C l_{2}$ + 2KOH $\to$ KCl + KClO + $H_{2} O$ 3KClO $\to$ 2KCl + $K C l O_{3}$ $4 K C l O_{3}$ $\to$ $3 K C l O_{4} + K C l$ Calculate the mass of chlorine needed to produce 23g of $K C l O_{4}$

50.

From the following reaction sequenceCl2 + 2KOH → KCl + KClO + H2O3KClO → 2KCl + KClO34KClO3 → 3KClO4+KClCalculate the mass of chlorine needed to produce 23g of KClO4

Answer»

From the following reaction sequence

$C l_{2}$ + 2KOH $\to$ KCl + KClO + $H_{2} O$

3KClO $\to$ 2KCl + $K C l O_{3}$

$4 K C l O_{3}$ $\to$ $3 K C l O_{4} + K C l$

Calculate the mass of chlorine needed to produce 23g of $K C l O_{4}$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Consider the reaction ph-co-och3___________+ch3mgbr+H3o+

hydrolysis of ch3cooNa increase when it is mixed with the solution of (1) ch3cooh (2) Naoh (3) hcl (4) Nh4o

In which of the following, dissociation of NH4OH will be minimised

what is cannizzaro reaction?

Why does the boundary between liquid phase and gaseous phase disppear on heating a liquid upto critical temperature in a closed vessel ? In this situation what will be the state of the substance?

The increasing order of acidic nature of the following oxides is

Explain the difference between molarity and molality.

1,2-Dihydroxybenzene(I) 1,3-Dihydroxybenzene(II)1,4-Dihydroxybenzene(III) Hydroxybenzene(IV)The increasing order of boiling points of the above alcohols is:

how many milligr^{}am of iron(fe^{+2}) are equal to 1ml of 0.1055N k_2Cr_2O_7 equivalent

Determine the wavelength of the first Lyman line, the transition from n=2 to n=1.

Q 33/75 Which among the following has highest number of atoms? 5 g of CO 24g of CO 1g of H 26g of O3

11.Temperature at which the root mean square velocity of Sulphur dioxide molecules is the same as that of oxygen at 27^° celsius is

An α−particle with kinetic energy 10 MeV is heading towards a stationary nucleus of atomic number 50. Calculate the distance of closest approach. Initially they were far apart.

48. The rate constant for the forward and backward reactions of hydrolysis of ester are 0.011 and 0.0015. the equilibrium constant of the reaction is_

Difference between conductivity and molar conductivity

The resistance of 0.01 N solution of an electrolyte is 210Ω at 298 K with a cell constant of 0.88cm−1. Calculate equivalent conductivity of the solution.

One mole of butane is burnt in excess oxygen and the gas produced is allowed to pass through a 3 M lime water solution having 1 L volume producing CaCO3 and H2O. The mole(s) of CaCO3 produced are .

A current of 2.0 A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At. wt. = 177). The oxidation state of the metal in the metal salt is:

Finkelstein reaction is

xKMnO4+yK2C2O4+zH2SO4⟶aMnO4+bCO2+6K2SO4+8H2OHere x,y,z, a and b are respectively

Ether is obtained from ethyl alcohol in presence of H2SO4 at ?

The element whose electronic configuration is 1s2, 2s2, 2p6, 3s2 is a/an?

In a cube of any crystal, A-atoms are placed at every corners and B-atoms are placed at every centre of face. The formula of compound is:

The wavelength of the first line of Balmer series is 6563 ˚A. The wavelength of the first line of Lyman series will be

Which one of the following pair of substances illustrate the law of multiple proportions?

out of Na+ , Na2+ , Na3+ , Na which is highly electronegative and why?

Which of them is not equal to zero for an ideal solution?

55 In a reversible reaction, the forward reaction was 3 time faster than that of reverse reaction. The reaction quotient is _______

Write the name andstructure of one of the common initiators used in freeradical additionpolymerisation.

Which of the following ion has maximum magnetic moment ? 1.Mn^{3+} 2.Cu^{2+} 3.Fe^{3+} 4.v^{3+} Also explain what is magnetic moment ?

Explain the following with suitabale examples : (i) Ferromagnetism (ii) Paramagnetism (iii) Ferrimagnetism (iv) Antiferromagnetism (v) 12-16 and 13-15 group compounds.

Which of the following equations depicts only the oxidizing nature of H2O2?

why alkyl halide on reaction with aqueous KOH give substitution reaction but on reacton with alcholicKOH give dehydro halogenation raaction why?

5. Determine the energy stored in the surfasoap bubble of radius 2.1 cm if its te4.5 x 10-2 Nm-1(1) 8 mJ(2) 2.46 mJ(3) 4.93 x 10-4 J(4) None of these

Which of the following compound contain a carboxylic group ?

Type of hybridization of complex (E) is:

Tropylium carbanion and cyclo penta dienyl carbanion is non aromatic or antiaromatic ?

ntWhat is the mechanism of Birnbaum simonini reaction?n

63. Complete combustion of 0.858 gram of compound X gives 2.63 gram of co2 and 1.28 gram of H2O the lowest molecular weight X can have

Which of the following elements has a big jump from its IE1 to IE2?

What is Discrete Data?

How many litres of liquid ccl4 must be measured out of contain 1 into 10 raise to power 25 CL atoms

sum of numbers from 1 to infinite

Nuclei of a radioactive element are being produced at a constant rate α. The element has a decay constant λ. At time t = 0, there are N0 nuclei of the element. The number N of nuclei at time t is

Is everything matter?

A solution which is 10-3 M each in Mn2+, Fe2+, Zn2+ and Hg2+ is treated with 10-16 M sulphide ion. If Ksp of MnS, FeS, ZnS and HgS are 10-15, 10-23, 10-20 and 10-54 respectively, which one will precipitate first?

From the following reaction sequenceCl2 + 2KOH → KCl + KClO + H2O3KClO → 2KCl + KClO34KClO3 → 3KClO4+KClCalculate the mass of chlorine needed to produce 23g of KClO4