46295 + Interview Questions in Chemistry

1.	Why ethanol & water show positive deviation. Explain in the point of view of chemical bonding. please explain in detail. Exam tomorrow.
Answer» Why ethanol & water show positive deviation. Explain in the point of view of chemical bonding. please explain in detail. Exam tomorrow.

Discussion

2.	which of the following solution has maximum value of freezing point 1. H2O 2. 0.1 M NaCl 3. 0.01 NaCl 4. 10.001 M NaCl
Answer» which of the following solution has maximum value of freezing point 1. H2O 2. 0.1 M NaCl 3. 0.01 NaCl 4. 10.001 M NaCl

2.

which of the following solution has maximum value of freezing point 1. H2O 2. 0.1 M NaCl 3. 0.01 NaCl 4. 10.001 M NaCl

Answer»

which of the following solution has maximum value of freezing point

1. H2O

2. 0.1 M NaCl

3. 0.01 NaCl

4. 10.001 M NaCl

Discussion

3.	Potassium crystallizes with a[MP PET/PMT 1998]
Answer» Potassium crystallizes with a [MP PET/PMT 1998]

3.

Potassium crystallizes with a[MP PET/PMT 1998]

Answer»

Potassium crystallizes with a

[MP PET/PMT 1998]

Discussion

4.	Which of the following solution has minimum freezing point?
Answer» Which of the following solution has minimum freezing point?

Discussion

5.	Portland cement does not contain
Answer» Portland cement does not contain

Discussion

6.	Which of the following are isoelectronic and isostructural. NO−3,CO2−3,ClO2−3,SO3
Answer» Which of the following are isoelectronic and isostructural. $N O_{3}^{-}, C O_{3}^{2 -}, C l O_{3}^{2 -}, S O_{3}$

Discussion

7.	How many aromatic amines can be represented by the molecular formula C7H9N ?
Answer» How many aromatic amines can be represented by the molecular formula C₇H₉N ?

Discussion

8.	The factor not affecting ionisation enthalpy is
Answer» The factor not affecting ionisation enthalpy is

Discussion

9.	The two Compounds shown in the figure below are
Answer» The two Compounds shown in the figure below are

9.

The two Compounds shown in the figure below are

Answer»

The two Compounds shown in the figure below are

Discussion

10.	The noble gases are
Answer» The noble gases are

10.

The noble gases are

Answer»

The noble gases are

Discussion

11.	Among the following oxides, neutral oxide is:
Answer» Among the following oxides, neutral oxide is:

Discussion

12.	The observed order of the stability of the cabocation is:
Answer» The observed order of the stability of the cabocation is:

Discussion

13.	Which alkali metal does not exhibit photoelectric effect:
Answer» Which alkali metal does not exhibit photoelectric effect:

Discussion

14.	The angle between the ovarlapping of one s-orbital and one p-orbital at the internuclear axis is:
Answer» The angle between the ovarlapping of one s-orbital and one p-orbital at the internuclear axis is:

Discussion

15.	The compound C5H13N is optically active and reacts with HONO to give C5H11OH. The compound is
Answer» The compound C₅H₁₃N is optically active and reacts with HONO to give C₅H₁₁OH. The compound is

Discussion

16.	The oxidation number of sulphur is +4 in
Answer» The oxidation number of sulphur is +4 in

Discussion

17.	Which of the following are examples of aldol condensation?
Answer» Which of the following are examples of aldol condensation?

Discussion

18.	The half - time period of a radioactive element is 140 days. After 560 days, one gram of the element will reduce to
Answer» The half - time period of a radioactive element is 140 days. After 560 days, one gram of the element will reduce to

18.

The half - time period of a radioactive element is 140 days. After 560 days, one gram of the element will reduce to

Answer»

The half - time period of a radioactive element is 140 days. After 560 days, one gram of the element will reduce to

Discussion

19.	At a certain temperature, the following reactions: NO(g)+12O2(g)⇌NO2(g) NO2(g)+NO(g)⇌N2O3(g) Have equilibrium constant K1 and $K_2$ respectively. The equilibrium constant for the reaction: 2NO(g)+12O2(g)⇌N2O3(g) at the same temperature would be:
Answer» At a certain temperature, the following reactions: $N O (g) + \frac{1}{2} O_{2} (g) ⇌ N O_{2} (g)$ $N O_{2} (g) + N O (g) ⇌ N_{2} O_{3} (g)$ Have equilibrium constant $K_{1}$ and $K_2$ respectively.The equilibriumconstant for the reaction: $2 N O (g) + \frac{1}{2} O_{2} (g) ⇌ N_{2} O_{3} (g)$ at the same temperature would be:

Discussion

20.	Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is
Answer» Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is

Discussion

21.	What is meant by crystal field splitting energy ? On the basis of crystal field theory, write the electronic configuration of d4 in terms of t2g and eg in an octahedral field when (i) Δ0>P (ii) Δ0<P
Answer» What is meant by crystal field splitting energy ? On the basis of crystal field theory, write the electronic configuration of $d^{4}$ in terms of $t_{2 g}$ and $e_{g}$ in an octahedral field when (i) $Δ_{0} > P$ (ii) $Δ_{0} < P$

Discussion

22.	Which one of the following represents the correct increasing order of bond angles in given molecules?
Answer» Which one of the following represents the correct increasing order of bond angles in given molecules?

Discussion

23.	The IUPAC name of vinylacytylene is
Answer» The IUPAC name of vinylacytylene is

Discussion

24.	The quantum numbers for the outermost electron of an element are given below as n=2,l=0,m=0,s=+12. The atoms is
Answer» The quantum numbers for the outermost electron of an element are given below as $n = 2, l = 0, m = 0, s = + \frac{1}{2}$ . The atoms is

Discussion

25.	The reaction H2S+H2O2⟶2H2O+S shows
Answer» The reaction $H_{2} S + H_{2} O_{2} ⟶ 2 H_{2} O + S$ shows

Discussion

26.	If z axis is the molecular axis then π orbitals are formed via the overlap of-
Answer» If $z$ axis is the molecular axis then $π$ orbitals are formed via the overlap of-

Discussion

27.	Which of the following are used to convert RCHO into RCH2OH? (a) H2 /Pd (b) LiAIH4 (c) NaBH4 (d) Reaction with RMgX followed by hydrolysis
Answer» Which of the following are used to convert RCHO into $R C H_{2} O H$ ? (a) $H_{2}$ /Pd (b) $L i A I H_{4}$ (c) $N a B H_{4}$ (d) Reaction with RMgX followed by hydrolysis

Discussion

28.	Define environmental chemistry.
Answer» Define environmental chemistry.

Discussion

29.	Among the following, the coloured compound is:
Answer» Among the following, the coloured compound is:

Discussion

30.	Which of the following statement is not true about the hexagonal close packing ? (a) The coordination number is 12 (b) It has 74% packing efficiency (c) Tetrahedral voids of the second layer are covered by the spheres of the third layer (d) In this arrangement spheres of the fourth layer are exactly aligned with those of the first layer
Answer» Which of the following statement is not true about the hexagonal close packing ? (a) The coordination number is 12 (b) It has 74% packing efficiency (c) Tetrahedral voids of the second layer are covered by the spheres of the third layer (d) In this arrangement spheres of the fourth layer are exactly aligned with those of the first layer

30.

Which of the following statement is not true about the hexagonal close packing ? (a) The coordination number is 12 (b) It has 74% packing efficiency (c) Tetrahedral voids of the second layer are covered by the spheres of the third layer (d) In this arrangement spheres of the fourth layer are exactly aligned with those of the first layer

Answer»

Which of the following statement is not true about the hexagonal close packing ?

(a) The coordination number is 12

(b) It has 74% packing efficiency

(c) Tetrahedral voids of the second layer are covered by the spheres of the third layer

(d) In this arrangement spheres of the fourth layer are exactly aligned with those of the first layer

Discussion

31.	A pure semiconductor has equal electron and hole concentration of 1016m−3. Doping by indium increases nh to 4.5×1022m−3.Whatisthevalueofn_e$ in the doped semiconductor?
Answer» A pure semiconductor has equal electron and hole concentration of $10^{16} m^{- 3}$ . Doping by indium increases $n_{h}$ to $4.5 \times 10^{22} m^{- 3} . W h a t i s t h e v a l u e o f$ n_e$ in the doped semiconductor?

31.

A pure semiconductor has equal electron and hole concentration of 1016m−3. Doping by indium increases nh to 4.5×1022m−3.Whatisthevalueofn_e$ in the doped semiconductor?

Answer»

A pure semiconductor has equal electron and hole concentration of $10^{16} m^{- 3}$ . Doping by indium increases $n_{h}$ to $4.5 \times 10^{22} m^{- 3} . W h a t i s t h e v a l u e o f$ n_e$ in the doped semiconductor?

Discussion

32.	In the following equation: FeS2+O2→Fe2O3+SO2 Calculate the volume of air (in L) measured at STP used in oxidation assuming that air contains 20% of oxygen by mole. (Given moles of FeS2 is 10)
Answer» In the following equation: $F e S_{2} + O_{2} \to F e_{2} O_{3} + S O_{2}$ Calculate the volume of air (in L) measured at STP used in oxidation assuming that air contains $20 %$ of oxygen by mole. (Given moles of $F e S_{2}$ is 10)

Discussion

33.	Butyric acid contains only C, H and O. A 4.24 mg sample of butyric acid is completely burned. It gves 8.45 mg of carbon dioxide (CO2) and 3.46 mg of water. What is the mass percentage of C, H and O in butyric acid respectively?
Answer» Butyric acid contains only C, H and O. A 4.24 mg sample of butyric acid is completely burned. It gves 8.45 mg of carbon dioxide $(C O_{2})$ and 3.46 mg of water. What is the mass percentage of C, H and O in butyric acid respectively?

Discussion

34.	A nucleus ruptures into two nuclear parts which have their velocity ratio equal to 2:1, then what is the ratio of their nuclear size?
Answer» A nucleus ruptures into two nuclear parts which have their velocity ratio equal to 2:1, then what is the ratio of their nuclear size?

Discussion

35.	Using Bohr’s theory in a one-electron atom. Choose the correct option(s). (n→ principal quantum number, z is number of protons in the nucleus).
Answer» Using Bohr’s theory in a one-electron atom. Choose the correct option(s). $(n \to$ principal quantum number, z is number of protons in the nucleus).

Discussion

36.	For the equilibrium in a closed vessel PCl5(g)⇌PCl3(g)+Cl2(g), Kp is found to be double of Kc. This is attained when:
Answer» For the equilibrium in a closed vessel $P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g),$ $K_{p}$ is found to be double of $K_{c} .$ This is attained when:

Discussion

37.	The rate of decay of a radioactive element at t = 0 instant 103 disintegrations/s. If the half- life of the elements is 1 s, then the rate of decay after 1 s will be
Answer» The rate of decay of a radioactive element at t = 0 instant $10^{3}$ disintegrations/s. If the half- life of the elements is 1 s, then the rate of decay after 1 s will be

Discussion

38.	If the solubility of lithium sodium hexafluoride aluminate, Li3Na3(AlF6)2 is ′s′ mol/L, its solubility product is equal to :
Answer» If the solubility of lithium sodium hexafluoride aluminate, $L i_{3} N a_{3} (A l F_{6})_{2}$ is $^{'} s^{'}$ mol/L, its solubility product is equal to :

Discussion

39.	Grignard reagent behave as
Answer» Grignard reagent behave as

Discussion

40.	Read the following and select one the correct answer. Statement I: In water, orthoboric acid behaves as a weak monobasic acid Statement II: In water, orthoboric acid acts as a proton donor
Answer» Read the following and select one the correct answer. Statement I: In water, orthoboric acid behaves as a weak monobasic acid Statement II: In water, orthoboric acid acts as a proton donor

40.

Read the following and select one the correct answer. Statement I: In water, orthoboric acid behaves as a weak monobasic acid Statement II: In water, orthoboric acid acts as a proton donor

Answer»

Read the following and select one the correct answer.

Statement I: In water, orthoboric acid behaves as a weak monobasic acid

Statement II: In water, orthoboric acid acts as a proton donor

Discussion

41.	Why is ozone important for our environment?
Answer» Why is ozone important for our environment?

Discussion

42.	Match Column-I with Column-II.
Answer» Match Column-I with Column-II.

Discussion

43.	For the reaction N2(g)+3H2(g)⇌2NH3(g);△H=−46 kJmol−1 Calculate the value of Kp. Given KC=0.5 lit2mol−2 and R=0.082 L atm mol−1 K−1 at 400o C
Answer» For the reaction $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g); △ H = - 46 k J m o l^{- 1}$ Calculate the value of $K_{p} .$ Given $K_{C} = 0.5 l i t^{2} m o l^{- 2}$ and $R = 0.082 L a t m m o l^{- 1} K^{- 1}$ at $400^{o} C$

Discussion

44.	A homonuclear diatomic gas molecule shows 2 electron magnetic moment. The one-electron and two-electron reduced species obtained from above gas molecule can act as both oxidizing and reducing agents. When the gas molecule is one-electron oxidized the bond length decreases compared to the neutral molecule. The gas molecule is:
Answer» A homonuclear diatomic gas molecule shows 2 electron magnetic moment. The one-electron and two-electron reduced species obtained from above gas molecule can act as both oxidizing and reducing agents. When the gas molecule is one-electron oxidized the bond length decreases compared to the neutral molecule. The gas molecule is:

Discussion

45.	p-Chloraniline and anilinium hydrochloride can be distinguished by
Answer» p-Chloraniline and anilinium hydrochloride can be distinguished by

Discussion

46.	What is elimination reaction?
Answer» What is elimination reaction?

Discussion

47.	How many dichloro products (including stereoisomers) are possible in the given reaction?
Answer» How many dichloro products (including stereoisomers) are possible in the given reaction?

Discussion

48.	A solution of a substance 'X' is used for whitewashing. (i) What is X? (ii) Write the reaction of the substance x with water.
Answer» A solution of a substance 'X' is used for whitewashing. (i) What is X? (ii) Write the reaction of the substance x with water.

Discussion

49.	In dilute alkaline solution, MnO−4 changes to:
Answer» In dilute alkaline solution, $M n O_{4}^{-}$ changes to:

Discussion

50.	Which of the following is not an amphoteric oxide?
Answer» Which of the following is not an amphoteric oxide?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why ethanol & water show positive deviation. Explain in the point of view of chemical bonding. please explain in detail. Exam tomorrow.

which of the following solution has maximum value of freezing point 1. H2O 2. 0.1 M NaCl 3. 0.01 NaCl 4. 10.001 M NaCl

Potassium crystallizes with a[MP PET/PMT 1998]

Which of the following solution has minimum freezing point?

Portland cement does not contain

Which of the following are isoelectronic and isostructural. NO−3,CO2−3,ClO2−3,SO3

How many aromatic amines can be represented by the molecular formula C7H9N ?

The factor not affecting ionisation enthalpy is

The two Compounds shown in the figure below are

The noble gases are

Among the following oxides, neutral oxide is:

The observed order of the stability of the cabocation is:

Which alkali metal does not exhibit photoelectric effect:

The angle between the ovarlapping of one s-orbital and one p-orbital at the internuclear axis is:

The compound C5H13N is optically active and reacts with HONO to give C5H11OH. The compound is

The oxidation number of sulphur is +4 in

Which of the following are examples of aldol condensation?

The half - time period of a radioactive element is 140 days. After 560 days, one gram of the element will reduce to

At a certain temperature, the following reactions: NO(g)+12O2(g)⇌NO2(g) NO2(g)+NO(g)⇌N2O3(g) Have equilibrium constant K1 and \(K_2\) respectively. The equilibrium constant for the reaction: 2NO(g)+12O2(g)⇌N2O3(g) at the same temperature would be:

Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is

What is meant by crystal field splitting energy ? On the basis of crystal field theory, write the electronic configuration of d4 in terms of t2g and eg in an octahedral field when (i) Δ0&gt;P (ii) Δ0&lt;P

Which one of the following represents the correct increasing order of bond angles in given molecules?

The IUPAC name of vinylacytylene is

The quantum numbers for the outermost electron of an element are given below as n=2,l=0,m=0,s=+12. The atoms is

The reaction H2S+H2O2⟶2H2O+S shows

If z axis is the molecular axis then π orbitals are formed via the overlap of-

Which of the following are used to convert RCHO into RCH2OH? (a) H2 /Pd (b) LiAIH4 (c) NaBH4 (d) Reaction with RMgX followed by hydrolysis

Define environmental chemistry.

Among the following, the coloured compound is:

A pure semiconductor has equal electron and hole concentration of 1016m−3. Doping by indium increases nh to 4.5×1022m−3.Whatisthevalueofn_e$ in the doped semiconductor?

In the following equation: FeS2+O2→Fe2O3+SO2 Calculate the volume of air (in L) measured at STP used in oxidation assuming that air contains 20% of oxygen by mole. (Given moles of FeS2 is 10)

Butyric acid contains only C, H and O. A 4.24 mg sample of butyric acid is completely burned. It gves 8.45 mg of carbon dioxide (CO2) and 3.46 mg of water. What is the mass percentage of C, H and O in butyric acid respectively?

A nucleus ruptures into two nuclear parts which have their velocity ratio equal to 2:1, then what is the ratio of their nuclear size?

Using Bohr’s theory in a one-electron atom. Choose the correct option(s). (n→ principal quantum number, z is number of protons in the nucleus).

For the equilibrium in a closed vessel PCl5(g)⇌PCl3(g)+Cl2(g), Kp is found to be double of Kc. This is attained when:

The rate of decay of a radioactive element at t = 0 instant 103 disintegrations/s. If the half- life of the elements is 1 s, then the rate of decay after 1 s will be

If the solubility of lithium sodium hexafluoride aluminate, Li3Na3(AlF6)2 is ′s′ mol/L, its solubility product is equal to :

Grignard reagent behave as

Read the following and select one the correct answer. Statement I: In water, orthoboric acid behaves as a weak monobasic acid Statement II: In water, orthoboric acid acts as a proton donor

Why is ozone important for our environment?

Match Column-I with Column-II.

For the reaction N2(g)+3H2(g)⇌2NH3(g);△H=−46 kJmol−1 Calculate the value of Kp. Given KC=0.5 lit2mol−2 and R=0.082 L atm mol−1 K−1 at 400o C

p-Chloraniline and anilinium hydrochloride can be distinguished by

What is elimination reaction?

How many dichloro products (including stereoisomers) are possible in the given reaction?

A solution of a substance 'X' is used for whitewashing. (i) What is X? (ii) Write the reaction of the substance x with water.

In dilute alkaline solution, MnO−4 changes to:

Which of the following is not an amphoteric oxide?

What is meant by crystal field splitting energy ? On the basis of crystal field theory, write the electronic configuration of d4 in terms of t2g and eg in an octahedral field when (i) Δ0>P (ii) Δ0<P