46295 + Interview Questions in Chemistry

1.	The correct sequence which shows decreasing order of the ionic radii of the elements is :
Answer» The correct sequence which shows decreasing order of the ionic radii of the elements is :

Discussion

2.	22. The energy of the second Bohr orbit in hydrogen atom is -3.41eV . The energy of the second Bohr orbit of He (+1) ion would be ?
Answer» 22. The energy of the second Bohr orbit in hydrogen atom is -3.41eV . The energy of the second Bohr orbit of He (+1) ion would be ?

Discussion

3.	Why i have to increase the value of b by 1 when a is greater than five in scientific notation. Expression of notationA*10b
Answer» Why i have to increase the value of b by 1 when a is greater than five in scientific notation. Expression of notation A*10b

Discussion

4.	'Taylor's techniques are universally applicable'. Defend or refute.
Answer» 'Taylor's techniques are universally applicable'. Defend or refute.

Discussion

5.	Which one is a polymer compound?
Answer» Which one is a polymer compound?

Discussion

6.	The ionization constant of dimethylamine is 5.4×10−4. Calculate its degree of ionization in its 0.02 M solution. What percentage of dimethylamine is ionized if the solution is also 0.1 M in NaOH?
Answer» The ionization constant of dimethylamine is $5.4 \times 10^{- 4}$ . Calculate its degree of ionization in its 0.02 M solution. What percentage of dimethylamine is ionized if the solution is also 0.1 M in NaOH?

Discussion

7.	Vulcanization makes rubber ........ (a) more elastic (b) soluble inorganic solvent (c) crystalline (d) more stiff
Answer» Vulcanization makes rubber ........ (a) more elastic (b) soluble inorganic solvent (c) crystalline (d) more stiff

7.

Vulcanization makes rubber ........ (a) more elastic (b) soluble inorganic solvent (c) crystalline (d) more stiff

Answer»

Vulcanization makes rubber ........

(a) more elastic

(b) soluble inorganic solvent

(c) crystalline

(d) more stiff

Discussion

8.	when nitration of chlorobenzene is done why 4- nitro chloro benzene is obtained as a major product and why 2-nitro chloro benzene is obtained as minor produc
Answer» when nitration of chlorobenzene is done why 4- nitro chloro benzene is obtained as a major product and why 2-nitro chloro benzene is obtained as minor produc

Discussion

9.	An ornament weighing 36 g in air, weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9.
Answer» An ornament weighing 36 g in air, weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9.

Discussion

10.	Non stoichiometric cuprous oxide, Cu2O can be prepared in the laboratory. In this oxide, copper to oxygen ratio is slightly less than 2:1, can you account for the fact that this substance is a p - type semiconductor?
Answer» Non stoichiometric cuprous oxide, $C u_{2} O$ can be prepared in the laboratory. In this oxide, copper to oxygen ratio is slightly less than 2:1, can you account for the fact that this substance is a p - type semiconductor?

Discussion

11.	12. Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is (1) [Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+ (2) [Co(H2O)6]3+, [Co(en)3]3+[Co(NH3)6]3+ (3) [Co(H2O)6]3+, [Co(NH3)6]3+, [Co(en)3]3+ (4) [Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+
Answer» 12. Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is (1) [Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+ (2) [Co(H2O)6]3+, [Co(en)3]3+[Co(NH3)6]3+ (3) [Co(H2O)6]3+, [Co(NH3)6]3+, [Co(en)3]3+ (4) [Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+

Discussion

12.	A solid AB has CsBr structure. If M is the formulamass of AB, then the density of unit cell of AB is(NA : Avogadro number, a = edge length of unit cell)2 x M2) N xa33 x M(3) N xa4M(4) N. xaho highest melting
Answer» A solid AB has CsBr structure. If M is the formulamass of AB, then the density of unit cell of AB is(NA : Avogadro number, a = edge length of unit cell)2 x M2) N xa33 x M(3) N xa4M(4) N. xaho highest melting

Discussion

13.	On acidification of aqueous borax solution, it gives white flakes. This is due to formation of
Answer» On acidification of aqueous borax solution, it gives white flakes. This is due to formation of

Discussion

14.	In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct statements and reason explains the assertion. (b) Both assertion and reason are wrong statements. (c) Assertion is correct statement and reason is wrong statement. (d) Assertion is wrong statement and reason is correct statement. (e) Assertion and reason both are correct statements but reason does not explain assertion. Assertion (A) β−glycosidic linkage is present in maltose. Reason (R) Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.
Answer» In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct statements and reason explains the assertion. (b) Both assertion and reason are wrong statements. (c) Assertion is correct statement and reason is wrong statement. (d) Assertion is wrong statement and reason is correct statement. (e) Assertion and reason both are correct statements but reason does not explain assertion. Assertion (A) $β -$ glycosidic linkage is present in maltose. Reason (R) Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.

Discussion

15.	Zn\|Zn2+(C1)\|\|Zn2+(C2)\|Zn. For this cell, Gibb's free energy change, ΔG is negative if:
Answer» ${Zn\|Zn}^{2 +} (C_{1}) \| \| {Zn}^{2 +} (C_{2}) \| Zn .$ For this cell, Gibb's free energy change, $Δ G$ is negative if:

Discussion

16.	A sample of radioactive material has mass m, decay constant λ, and molecular weight M. Avogadro’s constant = NA. The initial activity of the sample is
Answer» A sample of radioactive material has mass m, decay constant $λ$ , and molecular weight M. Avogadro’s constant = $N_{A}$ . The initial activity of the sample is

Discussion

17.	Choose the correct order of bond strength by overlapping of atomic orbitals:
Answer» Choose the correct order of bond strength by overlapping of atomic orbitals:

Discussion

18.	Which of the following carbanions are not resonance stabilized?
Answer» Which of the following carbanions are not resonance stabilized?

Discussion

19.	31. a moles of pcl5 are heated in a closed container till equilibrium is established at a pressure of P atm. If b moles of pcl5 dissociate at equilibrium then what is the relation between a, b, kp, P
Answer» 31. a moles of pcl5 are heated in a closed container till equilibrium is established at a pressure of P atm. If b moles of pcl5 dissociate at equilibrium then what is the relation between a, b, kp, P

Discussion

20.	product formed when salicylic acid is treated with a nitrating mixture
Answer» product formed when salicylic acid is treated with a nitrating mixture

Discussion

21.	3. What does methyl amine on reaction with nitrous acid give? (I heard from somewhere it gives ether)?
Answer» 3. What does methyl amine on reaction with nitrous acid give? (I heard from somewhere it gives ether)?

Discussion

22.	35.How to calculate zeffective value for Indium and Copper
Answer» 35.How to calculate zeffective value for Indium and Copper

Discussion

23.	The coagulation of 10 cm3 of Gold sol by 1 mL 10% NaCl solution is completely prevented by addition of 0.25 g of starch to it. The gold number of starch is:
Answer» The coagulation of $10 {cm}^{3}$ of Gold sol by $1 mL$ $10 %$ $N a C l$ solution is completely prevented by addition of $0.25 g$ of starch to it. The gold number of starch is:

Discussion

24.	Nitrogen exists in its elemental form as
Answer» Nitrogen exists in its elemental form as

Discussion

25.	40 Which of the d orbital has its 4 lobes along the axis - dxy dyz dzx dx2-dy2
Answer» 40 Which of the d orbital has its 4 lobes along the axis - dxy dyz dzx dx2-dy2

Discussion

26.	If in a vernier callipers 10 VSD coincides with 8MSD then the least count of vernier callipers is
Answer» If in a vernier callipers 10 VSD coincides with 8MSD then the least count of vernier callipers is

Discussion

27.	6. Consider the Arrhenius equation given below and mark the correct option. k =Ae (a) Rate constant increases exponentially with increasing activation energy _ and decreasing temperature. (b) Rate constant decreases exponentially with increasing activation energy and decreasing temperature. (c) Rate constant increases exponentially with decreasing activation energy and decreasing temperature. (d) Rate constant increases exponentially with decreasing activation energy and increasing temperature.
Answer» 6. Consider the Arrhenius equation given below and mark the correct option. k =Ae (a) Rate constant increases exponentially with increasing activation energy _ and decreasing temperature. (b) Rate constant decreases exponentially with increasing activation energy and decreasing temperature. (c) Rate constant increases exponentially with decreasing activation energy and decreasing temperature. (d) Rate constant increases exponentially with decreasing activation energy and increasing temperature.

Discussion

28.	Kinetic energy per unit volume of H2 gas at NTP is
Answer» Kinetic energy per unit volume of H2 gas at NTP is

Discussion

29.	NO and Br2 at initial partial pressures of 98.4 and 41.3 torr, respectively, were allowed to react at 300 K. At equilibrium the total pressure was 110.5 torr. Calculate the value of the equilibrium constant (Kp) at 300 K, for the reaction 2NO(g)+Br2(g)⇌2NOBr(g).
Answer» $N O$ and $B r_{2}$ at initial partial pressures of 98.4 and 41.3 $torr$ , respectively, were allowed to react at $300 K$ . At equilibrium the total pressure was $110.5 torr$ . Calculate the value of the equilibrium constant ( $K p$ ) at $300 K$ , for the reaction $2 N O (g) + B r_{2} (g) ⇌ 2 N O B r (g) .$

Discussion

30.	The equations under balanced conditions for a bridge are:R1=R2R3R4 and L1=R2R3C4 where R1 and L1 are respectively unknown resistance and inductance. In order to achieve faster balance which of the following variables are chosen?
Answer» The equations under balanced conditions for a bridge are: $R_{1} = \frac{R_{2} R_{3}}{R_{4}} a n d L_{1} = R_{2} R_{3} C_{4} w h e r e R_{1} a n d L_{1}$ are respectively unknown resistance and inductance. In order to achieve faster balance which of the following variables are chosen?

Discussion

31.	7. P is a non polar oxide of xenon. Number of dπ pπ bonds in a molecule of P is= x. Maximum number of atoms in a plane in a molecule of P is= y.
Answer» 7. P is a non polar oxide of xenon. Number of dπ pπ bonds in a molecule of P is= x. Maximum number of atoms in a plane in a molecule of P is= y.

Discussion

32.	Can cyclic hydrocarbons have an sp hybridized carbon?
Answer» Can cyclic hydrocarbons have an $s p$ hybridized carbon?

Discussion

33.	The total entropy change (△Stotal) for the system and the surrounding of a spontaneous process is given by:
Answer» The total entropy change $(△ S_{t o t a l})$ for the system and the surrounding of a spontaneous process is given by:

Discussion

34.	If Ka1 and Ka2 are the ionization constants of H3N+CHICOOH and H3N+CHICOO−, respectively, the pH of the solution at the isoelectric point is
Answer» If $K_{a 1}$ and $K_{a 2}$ are the ionization constants of $H_{3} N^{+} C H I C O O H$ and $H_{3} N^{+} C H I C O O^{-},$ respectively, the pH of the solution at the isoelectric point is

Discussion

35.	An ideal mono-atomic gas undergoes a cyclic process ABCA as shown in the figure. The ratio of heat absorbed during AB to the work done on the gas during BC is: (γ=53)
Answer» An ideal mono-atomic gas undergoes a cyclic process ABCA as shown in the figure. The ratio of heat absorbed during AB to the work done on the gas during BC is: $(γ = \frac{5}{3})$

Discussion

36.	A group 13 element X reacts with chlorine gas to produce a compound XCl3. XCl3 is electron deficient and easily reacts with NH3 to form Cl3X→NH3 adduct; however, XCl3 does not dimerize, X is:
Answer» A group 13 element X reacts with chlorine gas to produce a compound $X C l_{3}$ . $X C l_{3}$ is electron deficient and easily reacts with $N H_{3}$ to form $C l_{3} X \to N H_{3} adduct$ ; however, $X C l_{3}$ does not dimerize, X is:

Discussion

37.	39. What is called back bonding ? And explain concept of finding acidic and basic strength
Answer» 39. What is called back bonding ? And explain concept of finding acidic and basic strength

Discussion

38.	Calculate the number of oxygen atoms required to combine with 7 g of N2 to form N2O3 when 80% of N2 is converted to N2O3.
Answer» Calculate the number of oxygen atoms required to combine with 7 g of $N_{2}$ to form $N_{2} O_{3}$ when $80 %$ of $N_{2}$ is converted to $N_{2} O_{3}$ .

Discussion

39.	The equivalent weight of H3PO4 in following reaction H3PO4 + Ca(OH)2 ---> CaHPO4 +2 H2O
Answer» The equivalent weight of H3PO4 in following reaction H3PO4 + Ca(OH)2 ---> CaHPO4 +2 H2O

39.

The equivalent weight of H3PO4 in following reaction H3PO4 + Ca(OH)2 ---> CaHPO4 +2 H2O

Answer»

The equivalent weight of H3PO4 in following reaction

H3PO4 + Ca(OH)2 ---> CaHPO4 +2 H2O

Discussion

40.	Which of the following will undergo a faster SN1?
Answer» Which of the following will undergo a faster $S_{N} 1$ ?

Discussion

41.	38.What is the difference between osmotic pressure and osmotic potential?
Answer» 38.What is the difference between osmotic pressure and osmotic potential?

Discussion

42.	Which one of the following can be classified as a Bronsted base:
Answer» Which one of the following can be classified as a Bronsted base:

Discussion

43.	molecules of watee of hydration in 252mg oxalic acid i
Answer» molecules of watee of hydration in 252mg oxalic acid i

Discussion

44.	1 mole of an ideal gas is taken through a process P = alpha v^2 Find Temperature of gas when its volume is doubled Consider initial Temperature T knot
Answer» 1 mole of an ideal gas is taken through a process P = alpha v^2 Find Temperature of gas when its volume is doubled Consider initial Temperature T knot

Discussion

45.	What are different types of coordinate complexes
Answer» What are different types of coordinate complexes

Discussion

46.	If the solubility product of cus is 6*10–6. Calculate the maximum molarity of CuS is aqueous solution
Answer» If the solubility product of cus is 6*10–6. Calculate the maximum molarity of CuS is aqueous solution

Discussion

47.	Calculate the equivalent weight of KI in given reaction CuSO_4+KI→ Cu_2I_2+K_2SO_4+I_{
Answer» Calculate the equivalent weight of KI in given reaction CuSO_4+KI→ Cu_2I_2+K_2SO_4+I_{

Discussion

48.	how to find coordination number
Answer» how to find coordination number

Discussion

49.	The first order reflection (n=1) from a crystal of the X-ray from a copper anode tube (1.54 ˚A) occurs at an angle of 45∘. What is the distance between the set of plane causing the diffraction?
Answer» The first order reflection $(n = 1)$ from a crystal of the X-ray from a copper anode tube $(1.54 ˚ A)$ occurs at an angle of $45^{\circ}$ . What is the distance between the set of plane causing the diffraction?

Discussion

50.	1/2 H_2(g) +AgCl(s)→ H^+(aq)+Cl^-(aq)+Ag(s) occurs in the galvanic cell: (1)Ag/AgCl(s)\vert KCl(sol)\vert\vert AgNO_3(sol)\vert Ag (2)Pt/H_2(g)\vert HCl(sol)\vert\vert AgNO_3(sol)\vert Ag (3)Pt/H_2(g)\vert HCl(sol)\vert\vert Cl^-\vert AgCl(sol)\vert Ag (4)Pt/H_2(g)\vert KCl(sol)\vert\vert AgCl(sol)\vert Ag
Answer» 1/2 H_2(g) +AgCl(s)→ H^+(aq)+Cl^-(aq)+Ag(s) occurs in the galvanic cell: (1)Ag/AgCl(s)\vert KCl(sol)\vert\vert AgNO_3(sol)\vert Ag (2)Pt/H_2(g)\vert HCl(sol)\vert\vert AgNO_3(sol)\vert Ag (3)Pt/H_2(g)\vert HCl(sol)\vert\vert Cl^-\vert AgCl(sol)\vert Ag (4)Pt/H_2(g)\vert KCl(sol)\vert\vert AgCl(sol)\vert Ag

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The correct sequence which shows decreasing order of the ionic radii of the elements is :

22. The energy of the second Bohr orbit in hydrogen atom is -3.41eV . The energy of the second Bohr orbit of He (+1) ion would be ?

Why i have to increase the value of b by 1 when a is greater than five in scientific notation. Expression of notationA*10b

'Taylor's techniques are universally applicable'. Defend or refute.

Which one is a polymer compound?

The ionization constant of dimethylamine is 5.4×10−4. Calculate its degree of ionization in its 0.02 M solution. What percentage of dimethylamine is ionized if the solution is also 0.1 M in NaOH?

Vulcanization makes rubber ........ (a) more elastic (b) soluble inorganic solvent (c) crystalline (d) more stiff

when nitration of chlorobenzene is done why 4- nitro chloro benzene is obtained as a major product and why 2-nitro chloro benzene is obtained as minor produc

An ornament weighing 36 g in air, weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9.

Non stoichiometric cuprous oxide, Cu2O can be prepared in the laboratory. In this oxide, copper to oxygen ratio is slightly less than 2:1, can you account for the fact that this substance is a p - type semiconductor?

12. Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is (1) [Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+ (2) [Co(H2O)6]3+, [Co(en)3]3+[Co(NH3)6]3+ (3) [Co(H2O)6]3+, [Co(NH3)6]3+, [Co(en)3]3+ (4) [Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+

A solid AB has CsBr structure. If M is the formulamass of AB, then the density of unit cell of AB is(NA : Avogadro number, a = edge length of unit cell)2 x M2) N xa33 x M(3) N xa4M(4) N. xaho highest melting

On acidification of aqueous borax solution, it gives white flakes. This is due to formation of

Zn|Zn2+(C1)||Zn2+(C2)|Zn. For this cell, Gibb's free energy change, ΔG is negative if:

A sample of radioactive material has mass m, decay constant λ, and molecular weight M. Avogadro’s constant = NA. The initial activity of the sample is

Choose the correct order of bond strength by overlapping of atomic orbitals:

Which of the following carbanions are not resonance stabilized?

31. a moles of pcl5 are heated in a closed container till equilibrium is established at a pressure of P atm. If b moles of pcl5 dissociate at equilibrium then what is the relation between a, b, kp, P

product formed when salicylic acid is treated with a nitrating mixture

3. What does methyl amine on reaction with nitrous acid give? (I heard from somewhere it gives ether)?

35.How to calculate zeffective value for Indium and Copper

The coagulation of 10 cm3 of Gold sol by 1 mL 10% NaCl solution is completely prevented by addition of 0.25 g of starch to it. The gold number of starch is:

Nitrogen exists in its elemental form as

40 Which of the d orbital has its 4 lobes along the axis - dxy dyz dzx dx2-dy2

If in a vernier callipers 10 VSD coincides with 8MSD then the least count of vernier callipers is

Kinetic energy per unit volume of H2 gas at NTP is

NO and Br2 at initial partial pressures of 98.4 and 41.3 torr, respectively, were allowed to react at 300 K. At equilibrium the total pressure was 110.5 torr. Calculate the value of the equilibrium constant (Kp) at 300 K, for the reaction 2NO(g)+Br2(g)⇌2NOBr(g).

The equations under balanced conditions for a bridge are:R1=R2R3R4 and L1=R2R3C4 where R1 and L1 are respectively unknown resistance and inductance. In order to achieve faster balance which of the following variables are chosen?

7. P is a non polar oxide of xenon. Number of dπ pπ bonds in a molecule of P is= x. Maximum number of atoms in a plane in a molecule of P is= y.

Can cyclic hydrocarbons have an sp hybridized carbon?

The total entropy change (△Stotal) for the system and the surrounding of a spontaneous process is given by:

If Ka1 and Ka2 are the ionization constants of H3N+CHICOOH and H3N+CHICOO−, respectively, the pH of the solution at the isoelectric point is

An ideal mono-atomic gas undergoes a cyclic process ABCA as shown in the figure. The ratio of heat absorbed during AB to the work done on the gas during BC is: (γ=53)

A group 13 element X reacts with chlorine gas to produce a compound XCl3. XCl3 is electron deficient and easily reacts with NH3 to form Cl3X→NH3 adduct; however, XCl3 does not dimerize, X is:

39. What is called back bonding ? And explain concept of finding acidic and basic strength

Calculate the number of oxygen atoms required to combine with 7 g of N2 to form N2O3 when 80% of N2 is converted to N2O3.

The equivalent weight of H3PO4 in following reaction H3PO4 + Ca(OH)2 ---&gt; CaHPO4 +2 H2O

Which of the following will undergo a faster SN1?

38.What is the difference between osmotic pressure and osmotic potential?

Which one of the following can be classified as a Bronsted base:

molecules of watee of hydration in 252mg oxalic acid i

1 mole of an ideal gas is taken through a process P = alpha v^2 Find Temperature of gas when its volume is doubled Consider initial Temperature T knot

What are different types of coordinate complexes

If the solubility product of cus is 6*10–6. Calculate the maximum molarity of CuS is aqueous solution

Calculate the equivalent weight of KI in given reaction CuSO_4+KI→ Cu_2I_2+K_2SO_4+I_{

how to find coordination number

The first order reflection (n=1) from a crystal of the X-ray from a copper anode tube (1.54 ˚A) occurs at an angle of 45∘. What is the distance between the set of plane causing the diffraction?

The equivalent weight of H3PO4 in following reaction H3PO4 + Ca(OH)2 ---> CaHPO4 +2 H2O