46295 + Interview Questions in Chemistry

1.	A solution of NaCN is
Answer» A solution of NaCN is

Discussion

2.	Conc. Aqueous sulpuric acid is 98%H2SO4 by mass and has density of 1.80 g/ml. Volume of acid required to make 1 litre of 0.1M H2SO4 solution is
Answer» Conc. Aqueous sulpuric acid is 98%H2SO4 by mass and has density of 1.80 g/ml. Volume of acid required to make 1 litre of 0.1M H2SO4 solution is

Discussion

3.	The electronic configuration of Ca2+ is:
Answer» The electronic configuration of $C a^{2 +}$ is:

Discussion

4.	What is the difference between valence shell electrons and valency ?
Answer» What is the difference between valence shell electrons and valency ?

Discussion

5.	Match the following 1. PCl3a. 2 lone pairsA. 5 Ligands2. ClF3b. 3 lone pairsB. 3 Ligands3. XeF6c. 0 lone pairsC. 6 Ligands4. SbCl5d. 1 lone pairsD. 4 Ligands
Answer» Match the following $\begin{matrix} 1. P C l_{3} & a. 2 lone pairs & A. 5 Ligands 2. C l F_{3} & b. 3 lone pairs & B. 3 Ligands 3. X e F_{6} & c. 0 lone pairs & C. 6 Ligands 4. S b C l_{5} & d. 1 lone pairs & D. 4 Ligands \end{matrix}$

Discussion

6.	Calculate the molality of 2M KCl solution.
Answer» Calculate the molality of 2M KCl solution.

Discussion

7.	Explain why cations are smaller and anions are larger than their parent atom.
Answer» Explain why cations are smaller and anions are larger than their parent atom.

Discussion

8.	Although chlorine is an electron withdrawing group, yet it is ortho-, para- directing in electrophilic aromatic substitution reactions .Its answer is given in NCERT but it doesn't make any sense to me. Please explain it in detail !
Answer» Although chlorine is an electron withdrawing group, yet it is ortho-, para- directing in electrophilic aromatic substitution reactions .Its answer is given in NCERT but it doesn't make any sense to me. Please explain it in detail !

Discussion

9.	The element which liberates oxygen gas from water is
Answer» The element which liberates oxygen gas from water is

Discussion

10.	Which of the following is diamagnetic?
Answer» Which of the following is diamagnetic?

Discussion

11.	The maximum number of compounds that have the same net dipole moment is? The dipole moment μ of C−Cl = 1.5D (1) Ph−Cl (2)(3) (4)(5)(6)
Answer» The maximum number of compounds that have the same net dipole moment is? The dipole moment $μ$ of $C - C l$ = 1.5D (1) $P h - C l$ (2)(3) (4)(5)(6)

11.

The maximum number of compounds that have the same net dipole moment is? The dipole moment μ of C−Cl = 1.5D (1) Ph−Cl (2)(3) (4)(5)(6)

Answer»

The maximum number of compounds that have the same net dipole moment is? The dipole moment $μ$ of $C - C l$ = 1.5D

(1) $P h - C l$

(2)(3)

(4)(5)(6)

Discussion

12.	How can water be boiled without heating?
Answer» How can water be boiled without heating?

Discussion

13.	Why does coefficient of viscosity decrease with increase in temperature in liquids?From F=6piR eta v or F=eta Adv/dx,viscous force is proportional to coeffocient of viscosity.But,this does not stand true if coefficient of viscosity decreases with increase in temperature?
Answer» Why does coefficient of viscosity decrease with increase in temperature in liquids?From F=6piR eta v or F=eta Adv/dx,viscous force is proportional to coeffocient of viscosity.But,this does not stand true if coefficient of viscosity decreases with increase in temperature?

Discussion

14.	Name of polymer used in laminating sheets and give the name of monomeric units involved in its formation.
Answer» Name of polymer used in laminating sheets and give the name of monomeric units involved in its formation.

Discussion

15.	Consider following reactions and write total number of reactions which can produce 1∘ alcohol as one of the product. 1) Et−COOHi. BH3−−−−−−−→ii. H+/H2O 2) (CH3)2CH−COOHNaBH4−−−−→ 3) Et−COOCH3H+/H2O−−−−−→ 4) (CH3)2C=CH2i. BH3,THF−−−−−−−−−→ii. H2O2,OH− 5) Et−COClH2−−−−−−−→Pd−BaSO4 6) (CH3)2CH−O−EtH+/H2O−−−−−→
Answer» Consider following reactions and write total number of reactions which can produce $1^{\circ}$ alcohol as one of the product. $1) E t - C O O H i . B H_{3} - ------ \to i i . H^{+} / H_{2} O$ $2) (C H_{3})_{2} C H - C O O H N a B H_{4} - --- \to$ $3) E t - C O O C H_{3} H^{+} / H_{2} O - ---- \to$ $4) (C H_{3})_{2} C = C H_{2} i . B H_{3}, T H F - -------- \to i i . H_{2} O_{2}, O H^{-}$ $5) E t - C O C l H_{2} - ------ \to P d - B a S O_{4}$ $6) (C H_{3})_{2} C H - O - E t H^{+} / H_{2} O - ---- \to$

Discussion

16.	The number of P-O-P bonds in cyclic metaphosphoric acid is:
Answer» The number of P-O-P bonds in cyclic metaphosphoric acid is:

Discussion

17.	Why does CH3 show +I effect and behave as an electron donor?
Answer» Why does CH₃show +I effect and behave as an electron donor?

Discussion

18.	In an organic compound of molar mass 108 gram/mole C, H, and N atoms are present in 9:1:3.5 by weight find out the molecular formula of the compound
Answer» In an organic compound of molar mass 108 gram/mole C, H, and N atoms are present in 9:1:3.5 by weight find out the molecular formula of the compound

Discussion

19.	In electrolysis of water why is oxygen released at anode?
Answer» In electrolysis of water why is oxygen released at anode?

Discussion

20.	Designate each subshell with n=4
Answer» Designate each subshell with n=4

Discussion

21.	How will you convert benzene into (i) p-nitrobromobenzene (ii) m-nitrochlorobenzene (iii) p -nitrotoluene (iv) acetophenone
Answer» How will you convert benzene into (i) p-nitrobromobenzene (ii) m-nitrochlorobenzene (iii) p -nitrotoluene (iv) acetophenone

21.

How will you convert benzene into (i) p-nitrobromobenzene (ii) m-nitrochlorobenzene (iii) p -nitrotoluene (iv) acetophenone

Answer»

How will you convert benzene into
(i) p-nitrobromobenzene

(ii) m-nitrochlorobenzene

(iii) p -nitrotoluene

(iv) acetophenone

Discussion

22.	If in the given reaction, 3I2 + OH- ----> IO3- + 5I- 2 moles of iodine are taken, then the ratio of iodate and iodine ions formed in the alkaline medium is? A 1:5 B 3:5 C 5:1 D 5:3
Answer» If in the given reaction, 3I₂+ OH- ----> IO₃- + 5I- 2 moles of iodine are taken, then the ratio of iodate and iodine ions formed in the alkaline medium is? A 1:5 B 3:5 C 5:1 D 5:3

22.

If in the given reaction, 3I2 + OH- ----> IO3- + 5I- 2 moles of iodine are taken, then the ratio of iodate and iodine ions formed in the alkaline medium is? A 1:5 B 3:5 C 5:1 D 5:3

Answer»

If in the given reaction, 3I₂+ OH- ----> IO₃- + 5I-

2 moles of iodine are taken, then the ratio of iodate and iodine ions formed in the alkaline medium is?

A 1:5

B 3:5

C 5:1

D 5:3

Discussion

23.	Write th IUPAC name of the compound given below CH3−CH2−C\|CH3=C\|CH2OH−OH
Answer» Write th IUPAC name of the compound given below $C H_{3} - C H_{2} - C \| C H_{3} = C \| C H_{2} O H - O H$

Discussion

24.	Heat liberated by burning 2 g of Carbon in excuses of oxygen is x KJ. The value of ΔHc of Carbon is
Answer» Heat liberated by burning $2 g$ of Carbon in excuses of oxygen is $x K J$ . The value of $Δ H c$ of Carbon is

Discussion

25.	The molar entropies of HI(g),H(g) and I(g) at 298K are 206.5,114.6, and 180.7 J mole−1 K−1 respectively. Using the Δ G0 given below,Calculate the bond energy of HI. H(g) → H(g) + I(g); Δ G0 = 271.8 kJ
Answer» The molar entropies of $H I (g), H (g)$ and $I (g)$ at $298 K$ are $206.5, 114.6$ , and $180.7 J m o l e^{- 1} K^{- 1}$ respectively. Using the $Δ G^{0}$ given below,Calculate the bond energy of HI. $H (g) \to H (g) + I (g)$ ; $Δ G^{0} = 271.8 k J$

25.

The molar entropies of HI(g),H(g) and I(g) at 298K are 206.5,114.6, and 180.7 J mole−1 K−1 respectively. Using the Δ G0 given below,Calculate the bond energy of HI. H(g) → H(g) + I(g); Δ G0 = 271.8 kJ

Answer»

The molar entropies of $H I (g), H (g)$ and $I (g)$ at $298 K$ are $206.5, 114.6$ , and $180.7 J m o l e^{- 1} K^{- 1}$ respectively. Using the $Δ G^{0}$ given below,Calculate the bond energy of HI.

$H (g) \to H (g) + I (g)$ ; $Δ G^{0} = 271.8 k J$

Discussion

26.	Match the types of defect given in Column I with the statement given in Column II. Column IColumn IIA.Impurity defect1.NaCl with anionic sites called F−centresB.Metal excess defect2.FeO with Fe3+ C.Metal deficiency defect3.NaCl with Sr2+ and some cationic sites vacant
Answer» Match the types of defect given in Column I with the statement given in Column II. $\begin{matrix} C o l u m n I & C o l u m n I I A . I m p u r i t y d e f e c t & 1. N a C l w i t h a n i o n i c s i t e s c a l l e d F - c e n t r e s B . M e t a l e x c e s s d e f e c t & 2. F e O w i t h F e^{3 +} C . M e t a l d e f i c i e n c y d e f e c t & 3. N a C l w i t h S r^{2 +} a n d s o m e c a t i o n i c s i t e s v a c a n t \end{matrix}$

26.

Match the types of defect given in Column I with the statement given in Column II. Column IColumn IIA.Impurity defect1.NaCl with anionic sites called F−centresB.Metal excess defect2.FeO with Fe3+ C.Metal deficiency defect3.NaCl with Sr2+ and some cationic sites vacant

Answer»

Match the types of defect given in Column I with the statement given in Column II.

$\begin{matrix} C o l u m n I & C o l u m n I I A . I m p u r i t y d e f e c t & 1. N a C l w i t h a n i o n i c s i t e s c a l l e d F - c e n t r e s B . M e t a l e x c e s s d e f e c t & 2. F e O w i t h F e^{3 +} C . M e t a l d e f i c i e n c y d e f e c t & 3. N a C l w i t h S r^{2 +} a n d s o m e c a t i o n i c s i t e s v a c a n t \end{matrix}$

Discussion

27.	CrO3 dissolves in aqueous NaOH to give:
Answer» $C r O_{3}$ dissolves in aqueous $N a O H$ to give:

Discussion

28.	The number of moles of H2 present in 0.112 L of H2 gas at STP is:
Answer» The number of moles of $H_{2}$ present in $0.112 L$ of $H_{2}$ gas at STP is:

Discussion

29.	The bond angle of a molecule undergoing sp2 hybridisation is:
Answer» The bond angle of a molecule undergoing sp² hybridisation is:

Discussion

30.	Which of the following ions is colourless?
Answer» Which of the following ions is colourless?

Discussion

31.	The content of carbon in pig iron is
Answer» The content of carbon in pig iron is

Discussion

32.	The information that is/are needed to determine the molar mass of an unknown solute is/are
Answer» The information that is/are needed to determine the molar mass of an unknown solute is/are

Discussion

33.	The density of water is 1 gm/ml. The number of molecules present in 1 litre of water is
Answer» The density of water is $1 g m / m l$ . The number of molecules present in $1 l i t r e$ of water $i s$

Discussion

34.	Orthoboric acid behaves as a weak monobasic acid giving H3O+ and
Answer» Orthoboric acid behaves as a weak monobasic acid giving $H_{3} O^{+}$ and

Discussion

35.	Which has maximum ionization potential?
Answer» Which has maximum ionization potential?

Discussion

36.	Match the following graphs of ideal gas with their coordinates.
Answer» Match the following graphs of ideal gas with their coordinates.

36.

Match the following graphs of ideal gas with their coordinates.

Answer»

Match the following graphs of ideal gas with their coordinates.

Discussion

37.	A polyatomic gas (γ=43) is compressed to 127 of its volume adiabatically and reversibly. If its initial pressure is P0 its new pressure will be
Answer» A polyatomic gas $(γ = \frac{4}{3})$ is compressed to $\frac{1}{27}$ of its volume adiabatically and reversibly. If its initial pressure is $P_{0}$ its new pressure will be

Discussion

38.	How much KCl (Molecular mass 74.5g) is required to prepare 2 L of 0.1 molar solution?
Answer» How much KCl (Molecular mass 74.5g) is required to prepare 2 L of 0.1 molar solution?

Discussion

39.	Bond energy of covalent O-H bond in water is:
Answer» Bond energy of covalent O-H bond in water is:

Discussion

40.	Dry distillation of calcium formate produces:
Answer» Dry distillation of calcium formate produces:

Discussion

41.	Which of the following is expected to have net dipole moment equal to zero?
Answer» Which of the following is expected to have net dipole moment equal to zero?

Discussion

42.	For a first order reaction, A → P, the temperature (T) dependent rate constant (k) was found to follow the equation: log k=2000T+6.0 the pre - exponential factor A and the activation energy Eα. respectively, are:
Answer» For a first order reaction, A $\to$ P, the temperature (T) dependent rate constant (k) was found to follow the equation: $l o g k = \frac{2000}{T} + 6.0$ the pre - exponential factor A and the activation energy $E_{α}$ . respectively, are:

Discussion

43.	The number of S2− ions present in 1 L of 0.1 M H2S [Ka(H2S)=10−21] solution having [H+]=0.1 M is:
Answer» The number of $S^{2 -}$ ions present in $1 L$ of $0.1 M$ $H_{2} S$ $[K_{a (H_{2} S)} = 10^{- 21}]$ solution having $[H^{+}] = 0.1 M$ is:

Discussion

44.	What is the value of n in the molecular formula of BenAl2Si6O18?
Answer» What is the value of $n$ in the molecular formula of $B e_{n} A l_{2} S i_{6} O_{18}$ ?

Discussion

45.	Good absorbers of heat are
Answer» Good absorbers of heat are

Discussion

46.	From the following compounds, which has the highest enol content?
Answer» From the following compounds, which has the highest enol content?

Discussion

47.	A crystal is made of particles X and Y. X forms FCC packing and Y occupies all the octahedral voids. If all the particles along one body diagonal are removed. Then the formula of the crystal would be:
Answer» A crystal is made of particles X and Y. X forms FCC packing and Y occupies all the octahedral voids. If all the particles along one body diagonal are removed. Then the formula of the crystal would be:

Discussion

48.	A well-known antibiotic penicillin contains 57.49% of carbon, 5.39% of hydrogen, 8.39% of nitrogen, 9.58% of sulphur and the remainder being oxygen. Calculate the empirical formula of the antibiotic.
Answer» A well-known antibiotic penicillin contains 57.49% of carbon, 5.39% of hydrogen, 8.39% of nitrogen, 9.58% of sulphur and the remainder being oxygen. Calculate the empirical formula of the antibiotic.

Discussion

49.	Calculate the lattice enthalpy of KCl from the following data at standard states- Enthalpy of sublimation of K=89 kJmol−1 Enthalpy of dissociation of Cl2=244 kJmol−1 Ionisation energy of K=425 kJmol−1 Electron gain enthalpy of Cl=−355 kJmol−1 Enthalpy of formation of KCl=−438 kJmol−1
Answer» Calculate the lattice enthalpy of $K C l$ from the following data at standard states- Enthalpy of sublimation of $K = 89 k J m o l^{- 1}$ Enthalpy of dissociation of $C l_{2} = 244 k J m o l^{- 1}$ Ionisation energy of $K = 425 k J m o l^{- 1}$ Electron gain enthalpy of $C l = - 355 k J m o l^{- 1}$ Enthalpy of formation of $K C l = - 438 k J m o l^{- 1}$

Discussion

50.	What will be the correct balanced redox reaction for the given equation? (Use oxidation number method) Tl2O3(s)+NH2OH(aq)→TlOH(s)+N2(g)
Answer» What will be the correct balanced redox reaction for the given equation? (Use oxidation number method) $T l_{2} O_{3} (s) + N H_{2} O H (a q) \to T l O H (s) + N_{2} (g)$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A solution of NaCN is

Conc. Aqueous sulpuric acid is 98%H2SO4 by mass and has density of 1.80 g/ml. Volume of acid required to make 1 litre of 0.1M H2SO4 solution is

The electronic configuration of Ca2+ is:

What is the difference between valence shell electrons and valency ?

Match the following 1. PCl3a. 2 lone pairsA. 5 Ligands2. ClF3b. 3 lone pairsB. 3 Ligands3. XeF6c. 0 lone pairsC. 6 Ligands4. SbCl5d. 1 lone pairsD. 4 Ligands

Calculate the molality of 2M KCl solution.

Explain why cations are smaller and anions are larger than their parent atom.

Although chlorine is an electron withdrawing group, yet it is ortho-, para- directing in electrophilic aromatic substitution reactions .Its answer is given in NCERT but it doesn't make any sense to me. Please explain it in detail !

The element which liberates oxygen gas from water is

Which of the following is diamagnetic?

The maximum number of compounds that have the same net dipole moment is? The dipole moment μ of C−Cl = 1.5D (1) Ph−Cl (2)(3) (4)(5)(6)

How can water be boiled without heating?

Why does coefficient of viscosity decrease with increase in temperature in liquids?From F=6piR eta v or F=eta Adv/dx,viscous force is proportional to coeffocient of viscosity.But,this does not stand true if coefficient of viscosity decreases with increase in temperature?

Name of polymer used in laminating sheets and give the name of monomeric units involved in its formation.

The number of P-O-P bonds in cyclic metaphosphoric acid is:

Why does CH​​​​​3 show +I effect and behave as an electron donor?

In an organic compound of molar mass 108 gram/mole C, H, and N atoms are present in 9:1:3.5 by weight find out the molecular formula of the compound

In electrolysis of water why is oxygen released at anode?

Designate each subshell with n=4

How will you convert benzene into (i) p-nitrobromobenzene (ii) m-nitrochlorobenzene (iii) p -nitrotoluene (iv) acetophenone

If in the given reaction, 3I2 + OH- ----&gt; IO​​​​​3​​​​- + 5I- 2 moles of iodine are taken, then the ratio of iodate and iodine ions formed in the alkaline medium is? A 1:5 B 3:5 C 5:1 D 5:3

Write th IUPAC name of the compound given below CH3−CH2−C|CH3=C|CH2OH−OH

Heat liberated by burning 2 g of Carbon in excuses of oxygen is x KJ. The value of ΔHc of Carbon is

The molar entropies of HI(g),H(g) and I(g) at 298K are 206.5,114.6, and 180.7 J mole−1 K−1 respectively. Using the Δ G0 given below,Calculate the bond energy of HI. H(g) → H(g) + I(g); Δ G0 = 271.8 kJ

Match the types of defect given in Column I with the statement given in Column II. Column IColumn IIA.Impurity defect1.NaCl with anionic sites called F−centresB.Metal excess defect2.FeO with Fe3+ C.Metal deficiency defect3.NaCl with Sr2+ and some cationic sites vacant

CrO3 dissolves in aqueous NaOH to give:

The number of moles of H2 present in 0.112 L of H2 gas at STP is:

The bond angle of a molecule undergoing sp2 hybridisation is:

Which of the following ions is colourless?

The content of carbon in pig iron is

The information that is/are needed to determine the molar mass of an unknown solute is/are

The density of water is 1 gm/ml. The number of molecules present in 1 litre of water is

Orthoboric acid behaves as a weak monobasic acid giving H3O+ and

Which has maximum ionization potential?

Match the following graphs of ideal gas with their coordinates.

A polyatomic gas (γ=43) is compressed to 127 of its volume adiabatically and reversibly. If its initial pressure is P0 its new pressure will be

How much KCl (Molecular mass 74.5g) is required to prepare 2 L of 0.1 molar solution?

Bond energy of covalent O-H bond in water is:

Dry distillation of calcium formate produces:

Which of the following is expected to have net dipole moment equal to zero?

For a first order reaction, A → P, the temperature (T) dependent rate constant (k) was found to follow the equation: log k=2000T+6.0 the pre - exponential factor A and the activation energy Eα. respectively, are:

The number of S2− ions present in 1 L of 0.1 M H2S [Ka(H2S)=10−21] solution having [H+]=0.1 M is:

What is the value of n in the molecular formula of BenAl2Si6O18? ​​​​​​​

Good absorbers of heat are

From the following compounds, which has the highest enol content?

A crystal is made of particles X and Y. X forms FCC packing and Y occupies all the octahedral voids. If all the particles along one body diagonal are removed. Then the formula of the crystal would be:

A well-known antibiotic penicillin contains 57.49% of carbon, 5.39% of hydrogen, 8.39% of nitrogen, 9.58% of sulphur and the remainder being oxygen. Calculate the empirical formula of the antibiotic.

Calculate the lattice enthalpy of KCl from the following data at standard states- Enthalpy of sublimation of K=89 kJmol−1 Enthalpy of dissociation of Cl2=244 kJmol−1 Ionisation energy of K=425 kJmol−1 Electron gain enthalpy of Cl=−355 kJmol−1 Enthalpy of formation of KCl=−438 kJmol−1

What will be the correct balanced redox reaction for the given equation? (Use oxidation number method) Tl2O3(s)+NH2OH(aq)→TlOH(s)+N2(g)

Why does CH3 show +I effect and behave as an electron donor?

If in the given reaction, 3I2 + OH- ----> IO3- + 5I- 2 moles of iodine are taken, then the ratio of iodate and iodine ions formed in the alkaline medium is? A 1:5 B 3:5 C 5:1 D 5:3

What is the value of n in the molecular formula of BenAl2Si6O18?