46295 + Interview Questions in Chemistry

1.	How many spectral lines are possible if electron is present in the 5 th shell and only 3 atoms are present
Answer» How many spectral lines are possible if electron is present in the 5 th shell and only 3 atoms are present

Discussion

2.	What are the steps involved in halogenation of alkanes?
Answer» What are the steps involved in halogenation of alkanes?

Discussion

3.	Among -NR2 and -NH2 which activates the benzene ring to a greater extent? What is the reason for that?
Answer» Among -NR2 and -NH2 which activates the benzene ring to a greater extent? What is the reason for that?

Discussion

4.	47 Write the following naming reactions. 1) Wurtz Fittig reaction 2)Fittig reaction
Answer» 47 Write the following naming reactions. 1) Wurtz Fittig reaction 2)Fittig reaction

Discussion

5.	If in ZnS unit cell all the atoms are removed from any two body digonals then what will be the formula
Answer» If in ZnS unit cell all the atoms are removed from any two body digonals then what will be the formula

Discussion

6.	Why do water droplets flow only in one way
Answer» Why do water droplets flow only in one way

Discussion

7.	What is the equivalent weight of crystalline oxalic acid?
Answer» What is the equivalent weight of crystalline oxalic acid?

Discussion

8.	19. 10 ml of hydrogen peroxide solution labelled 10 volume just decolorises 100ml of acidified potassium permanganate solution. The normality of KMnO4 solution is
Answer» 19. 10 ml of hydrogen peroxide solution labelled 10 volume just decolorises 100ml of acidified potassium permanganate solution. The normality of KMnO4 solution is

Discussion

9.	How to determine the basicity order for nitrogen ring compound
Answer» How to determine the basicity order for nitrogen ring compound

Discussion

10.	A 0.60 g sample consisting of only CaC2O4 and MgC2O4 is heated at 500 o C, converting the two salts of CaCO3 and MgCO3. The sample then weighs 0.465 g. If the sample had been heated to 900 o C and the products are CaO and MgO, what would the mixtures of oxides have weighed?
Answer» A $0.60 g$ sample consisting of only $C a C_{2} O_{4}$ and $M g C_{2} O_{4}$ is heated at $500^{o} C,$ converting the two salts of $C a C O_{3}$ and $M g C O_{3} .$ The sample then weighs $0.465 g$ . If the sample had been heated to $900^{o} C$ and the products are $C a O$ and $M g O$ , what would the mixtures of oxides have weighed?

Discussion

11.	Which among the following is an example of thermosetting polymer?
Answer» Which among the following is an example of thermosetting polymer?

Discussion

12.	A 2μF 'air filled' and 4μF 'glass filled' parallel plate capacitors are connected in series with a source of potential difference V0. Plate separation of both capacitors is 0.5 mm. Dielectric strength of air is 3 kV/mm and that of glass is 9 kV/mm. What can be maximum value of V0 in kV so that none of the capacitors gets breakdown (Answer up to two decimal places)
Answer» A $2 μ F$ 'air filled' and $4 μ F$ 'glass filled' parallel plate capacitors are connected in series with a source of potential difference $V_{0}$ . Plate separation of both capacitors is 0.5 mm. Dielectric strength of air is 3 kV/mm and that of glass is 9 kV/mm. What can be maximum value of $V_{0}$ in kV so that none of the capacitors gets breakdown (Answer up to two decimal places)

Discussion

13.	A thin walled cylindrical metal vessel (α = 10–3K–1) contains a liquid ( = 10–3K–1). If the vessel and its contents are now heated by 10 K the pressure due to the liquid at the bottom
Answer» A thin walled cylindrical metal vessel (α = 10–3K–1) contains a liquid ( = 10–3K–1). If the vessel and its contents are now heated by 10 K the pressure due to the liquid at the bottom

Discussion

14.	In a cathode ray tube, does the energy conversion take place as electrical energy to visual energy or electrical energy to light energy?
Answer» In a cathode ray tube, does the energy conversion take place as electrical energy to visual energy or electrical energy to light energy?

Discussion

15.	The osmotic pressure of a 5% (wt/vol) solution of cane sugar at 1500C is
Answer» The osmotic pressure of a 5% (wt/vol) solution of cane sugar at 150⁰C is

Discussion

16.	The typical output characteristics curve for a transistor working in the common emitter configuration is shown in the figure. The estimated current gain from the figure is ______.
Answer» The typical output characteristics curve for a transistor working in the common emitter configuration is shown in the figure. The estimated current gain from the figure is ______.

Discussion

17.	In the nuclear transmutation, 94Be+X→ 84Be+Y X and Y are
Answer» In the nuclear transmutation, $_{4}^{9} B e + X \to_{4}^{8} B e + Y$ X and Y are

Discussion

18.	Which of the following cannot act as Lewis base?
Answer» Which of the following cannot act as Lewis base?

Discussion

19.	Q. Bond dissociation enthalpies of H_{2(g)} and N_{2(g) } are 436.0 kJ mol^{-1} respectively and enthalpy of formantion of NH_{3(g) } is -46 KJ mol^{-1}. what are the enthalpies of atomization of_{{{{}}_{}}_{}} NH_{3(g) }and the average bond enthalpy of N-H bond respectively ( in KJ mol^{-1})
Answer» Q. Bond dissociation enthalpies of H_{2(g)} and N_{2(g) } are 436.0 kJ mol^{-1} respectively and enthalpy of formantion of NH_{3(g) } is -46 KJ mol^{-1}. what are the enthalpies of atomization of_{{{{}}_{}}_{}} NH_{3(g) }and the average bond enthalpy of N-H bond respectively ( in KJ mol^{-1})

Discussion

20.	If 2^n and 5^n start with the same digit d .Find d.
Answer» If 2^n and 5^n start with the same digit d .Find d.

Discussion

21.	19. Electrolysis of Mgcl2 when there is Hg electrode
Answer» 19. Electrolysis of Mgcl2 when there is Hg electrode

Discussion

22.	The standard enthalpy of combustion at 25o C of hydrogen, cyclohexene (C6H10) and cyclohexane (C6H12 ) are −241, −3800 and −3920kJ mol−1 respectively. Calculate the heat of hydrogenation of cyclohexene ( in kJ mol−1)
Answer» The standard enthalpy of combustion at $25^{o} C$ of hydrogen, cyclohexene ( $C_{6} H_{10}$ ) and cyclohexane ( $C_{6} H_{12}$ ) are $- 241, - 3800 a n d - 3920 k J m o l^{- 1}$ respectively. Calculate the heat of hydrogenation of cyclohexene ( in $k J m o l^{- 1}$ )

Discussion

23.	The IUPAC name of the alkene is
Answer» The IUPAC name of the alkene is

Discussion

24.	In presence of electric and magnetic field , where does the cathode rays deflect , towards positive or negatively charged particles ?
Answer» In presence of electric and magnetic field , where does the cathode rays deflect , towards positive or negatively charged particles ?

Discussion

25.	For the reaction 2A + 3B → products, A is in excess and on changing the concentration of B from 0.1 M to 0.4 M, rate becomes doubled. Thus, rate law is
Answer» For the reaction 2A + 3B $\to$ products, A is in excess and on changing the concentration of B from 0.1 M to 0.4 M, rate becomes doubled. Thus, rate law is

Discussion

26.	Identify A and B in the following chemical reaction:
Answer» Identify A and B in the following chemical reaction:

Discussion

27.	44. Density of 2molal aqueous solution of NAOH is 1.10 g/L . calculate molarity of the solution
Answer» 44. Density of 2molal aqueous solution of NAOH is 1.10 g/L . calculate molarity of the solution

Discussion

28.	How many hydrogen bonded water molecules are present in blue vitrol? Blue citrol formula is CuSO4.5H20.so why only 1 hydrogen bonded water molecule
Answer» How many hydrogen bonded water molecules are present in blue vitrol? Blue citrol formula is CuSO4.5H20.so why only 1 hydrogen bonded water molecule

Discussion

29.	Identify the nucleophile that attacks the carbocation in the second step of acid catalysed hydration of alkenes?
Answer» Identify the nucleophile that attacks the carbocation in the second step of acid catalysed hydration of alkenes?

Discussion

30.	Equivalent resonating structures are observed in(1) Acetate ion(3) Phosphate ion(2) Nitrate ion(4) All of these
Answer» Equivalent resonating structures are observed in (1) Acetate ion (3) Phosphate ion (2) Nitrate ion (4) All of these

Discussion

31.	Ag2So4 unpaired electron
Answer» Ag2So4 unpaired electron

Discussion

32.	The speed of three molecules is 2m/s,3m/s,4m/s.find the average speed and rms speed of the molecules
Answer» The speed of three molecules is 2m/s,3m/s,4m/s.find the average speed and rms speed of the molecules

Discussion

33.	Formation of ethylene from acetylene is an example of
Answer» Formation of ethylene from acetylene is an example of

Discussion

34.	77.Structure and bond angle of NO2-, NO2, NO2+ AND NH4+
Answer» 77.Structure and bond angle of NO2-, NO2, NO2+ AND NH4+

Discussion

35.	Number of sp2 hybrid carbon atoms present in aspartame is .
Answer» Number of $s p^{2}$ hybrid carbon atoms present in aspartame is .

Discussion

36.	Alkanes are prepared by the following methods I) Decarboxylation of salts of fatty acids II) Wurtz reactionIII) Kolbe's electrolysis IV) Sabatier - Senderen's reactionV) Reduction of alkyl halides In which of these methods, a sigma bond is formed between carbon atoms
Answer» Alkanes are prepared by the following methods I) Decarboxylation of salts of fatty acids II) Wurtz reaction III) Kolbe's electrolysis IV) Sabatier - Senderen's reaction V) Reduction of alkyl halides In which of these methods, a sigma bond is formed between carbon atoms

36.

Alkanes are prepared by the following methods I) Decarboxylation of salts of fatty acids II) Wurtz reactionIII) Kolbe's electrolysis IV) Sabatier - Senderen's reactionV) Reduction of alkyl halides In which of these methods, a sigma bond is formed between carbon atoms

Answer»

Alkanes are prepared by the following methods
I) Decarboxylation of salts of fatty acids
II) Wurtz reaction

III) Kolbe's electrolysis
IV) Sabatier - Senderen's reaction

V) Reduction of alkyl halides

In which of these methods, a sigma bond is formed between carbon atoms

Discussion

37.	What volume of ammonia gas at NTP will be required to be passed into 30 mL of 1 N H2SO4 to bring down the acid normality to 0.2 N?
Answer» What volume of ammonia gas at NTP will be required to be passed into $30 mL$ of $1 N H_{2} S O_{4}$ to bring down the acid normality to $0.2 N$ ?

Discussion

38.	What arethe oxidation states of phosphorus in the following:(i) H3PO3 (ii) PCl3 (iii) Ca3P2(iv) Na3PO4 (v) POF3?
Answer» What are the oxidation states of phosphorus in the following: (i) H₃PO₃ (ii) PCl₃(iii) Ca₃P₂ (iv) Na₃PO₄ (v) POF₃?

38.

What arethe oxidation states of phosphorus in the following:(i) H3PO3 (ii) PCl3 (iii) Ca3P2(iv) Na3PO4 (v) POF3?

Answer»

What are
the oxidation states of phosphorus in the following:

(i) H₃PO₃
(ii) PCl₃(iii) Ca₃P₂

(iv) Na₃PO₄
(v) POF₃?

Discussion

39.	30. In nitro benzene the total number of bonded electrons equals?
Answer» 30. In nitro benzene the total number of bonded electrons equals?

Discussion

40.	give the general formula of soaps
Answer» give the general formula of soaps

Discussion

41.	Among the following, the wrong statement is
Answer» Among the following, the wrong statement is

Discussion

42.	Which carbocation is involved in the above reaction ?
Answer» Which carbocation is involved in the above reaction ?

Discussion

43.	In which of the following cases C-C bond length will be highest ? a)CH_3-CF_3 b)FCH_2-CH_2F c)F_2CH-CHF_2 d)CF_3-CF_3
Answer» In which of the following cases C-C bond length will be highest ? a)CH_3-CF_3 b)FCH_2-CH_2F c)F_2CH-CHF_2 d)CF_3-CF_3

Discussion

44.	Under the same condition how many ml of 1M KOH and 0.5M H2SO4 solution respectively when mixed to form a total volume of 100 ml produce maximum rise in temperature??explain with detail concept
Answer» Under the same condition how many ml of 1M KOH and 0.5M H2SO4 solution respectively when mixed to form a total volume of 100 ml produce maximum rise in temperature??explain with detail concept

Discussion

45.	The arrangement of X− ions around A+ ions in solid AX is given in the figure (not drawn to scale).If the radius of X− is 250 pm, the radius of A+ is:
Answer» The arrangement of $X^{-}$ ions around $A^{+}$ ions in solid $A X$ is given in the figure (not drawn to scale). If the radius of $X^{-}$ is $250 pm$ , the radius of $A^{+}$ is:

Discussion

46.	19 The heat of reaction for an endothermic reaction at equilibrium is 1200 calories more than that at constant pressure at 300 K. Calculate the ratio of equilibrium constant Kp and Kc.
Answer» 19 The heat of reaction for an endothermic reaction at equilibrium is 1200 calories more than that at constant pressure at 300 K. Calculate the ratio of equilibrium constant Kp and Kc.

Discussion

47.	The concentration of a toxic substance in the solution is 2250 ppb. What will be the concentration of toxic in % (w/w) is:
Answer» The concentration of a toxic substance in the solution is $2250 p p b$ . What will be the concentration of toxic in $% (w / w)$ is:

Discussion

48.	a compound consist of three element p q r. atoms of elements p forms ccp lattice and those of element of q occupie 1/3 of tetrahedral voids and r occupiy 2/3 of octahedral voids formula of compounds formed by these elements
Answer» a compound consist of three element p q r. atoms of elements p forms ccp lattice and those of element of q occupie 1/3 of tetrahedral voids and r occupiy 2/3 of octahedral voids formula of compounds formed by these elements

Discussion

49.	Atoms A present at edges, B at corners, C at body centres and D at faces. consider the body centre as the origin and the atoms present in the first octant are removed then find the formula.
Answer» Atoms A present at edges, B at corners, C at body centres and D at faces. consider the body centre as the origin and the atoms present in the first octant are removed then find the formula.

Discussion

50.	How a dπ - dπ bond is formed
Answer» How a dπ - dπ bond is formed

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How many spectral lines are possible if electron is present in the 5 th shell and only 3 atoms are present

What are the steps involved in halogenation of alkanes?

Among -NR2 and -NH2 which activates the benzene ring to a greater extent? What is the reason for that?

47 Write the following naming reactions. 1) Wurtz Fittig reaction 2)Fittig reaction

If in ZnS unit cell all the atoms are removed from any two body digonals then what will be the formula

Why do water droplets flow only in one way

What is the equivalent weight of crystalline oxalic acid?

19. 10 ml of hydrogen peroxide solution labelled 10 volume just decolorises 100ml of acidified potassium permanganate solution. The normality of KMnO4 solution is

How to determine the basicity order for nitrogen ring compound

A 0.60 g sample consisting of only CaC2O4 and MgC2O4 is heated at 500 o C, converting the two salts of CaCO3 and MgCO3. The sample then weighs 0.465 g. If the sample had been heated to 900 o C and the products are CaO and MgO, what would the mixtures of oxides have weighed?

Which among the following is an example of thermosetting polymer?

A thin walled cylindrical metal vessel (α = 10–3K–1) contains a liquid ( = 10–3K–1). If the vessel and its contents are now heated by 10 K the pressure due to the liquid at the bottom

In a cathode ray tube, does the energy conversion take place as electrical energy to visual energy or electrical energy to light energy?

The osmotic pressure of a 5% (wt/vol) solution of cane sugar at 1500C is

The typical output characteristics curve for a transistor working in the common emitter configuration is shown in the figure. The estimated current gain from the figure is ______.

In the nuclear transmutation, 94Be+X→ 84Be+Y X and Y are

Which of the following cannot act as Lewis base?

Q. Bond dissociation enthalpies of H_{2(g)} and N_{2(g) } are 436.0 kJ mol^{-1} respectively and enthalpy of formantion of NH_{3(g) } is -46 KJ mol^{-1}. what are the enthalpies of atomization of_{{{{}}_{}}_{}} NH_{3(g) }and the average bond enthalpy of N-H bond respectively ( in KJ mol^{-1})

If 2^n and 5^n start with the same digit d .Find d.

19. Electrolysis of Mgcl2 when there is Hg electrode

The standard enthalpy of combustion at 25o C of hydrogen, cyclohexene (C6H10) and cyclohexane (C6H12 ) are −241, −3800 and −3920kJ mol−1 respectively. Calculate the heat of hydrogenation of cyclohexene ( in kJ mol−1)

The IUPAC name of the alkene is

In presence of electric and magnetic field , where does the cathode rays deflect , towards positive or negatively charged particles ?

For the reaction 2A + 3B → products, A is in excess and on changing the concentration of B from 0.1 M to 0.4 M, rate becomes doubled. Thus, rate law is

Identify A and B in the following chemical reaction:

44. Density of 2molal aqueous solution of NAOH is 1.10 g/L . calculate molarity of the solution

How many hydrogen bonded water molecules are present in blue vitrol? Blue citrol formula is CuSO4.5H20.so why only 1 hydrogen bonded water molecule

Identify the nucleophile that attacks the carbocation in the second step of acid catalysed hydration of alkenes?

Equivalent resonating structures are observed in(1) Acetate ion(3) Phosphate ion(2) Nitrate ion(4) All of these

Ag2So4 unpaired electron

The speed of three molecules is 2m/s,3m/s,4m/s.find the average speed and rms speed of the molecules

Formation of ethylene from acetylene is an example of

77.Structure and bond angle of NO2-, NO2, NO2+ AND NH4+

Number of sp2 hybrid carbon atoms present in aspartame is .

Alkanes are prepared by the following methods I) Decarboxylation of salts of fatty acids II) Wurtz reactionIII) Kolbe's electrolysis IV) Sabatier - Senderen's reactionV) Reduction of alkyl halides In which of these methods, a sigma bond is formed between carbon atoms

What volume of ammonia gas at NTP will be required to be passed into 30 mL of 1 N H2SO4 to bring down the acid normality to 0.2 N?

What arethe oxidation states of phosphorus in the following:(i) H3PO3 (ii) PCl3 (iii) Ca3P2(iv) Na3PO4 (v) POF3?

30. In nitro benzene the total number of bonded electrons equals?

give the general formula of soaps

Among the following, the wrong statement is

Which carbocation is involved in the above reaction ?

In which of the following cases C-C bond length will be highest ? a)CH_3-CF_3 b)FCH_2-CH_2F c)F_2CH-CHF_2 d)CF_3-CF_3

Under the same condition how many ml of 1M KOH and 0.5M H2SO4 solution respectively when mixed to form a total volume of 100 ml produce maximum rise in temperature??explain with detail concept

The arrangement of X− ions around A+ ions in solid AX is given in the figure (not drawn to scale).If the radius of X− is 250 pm, the radius of A+ is:

19 The heat of reaction for an endothermic reaction at equilibrium is 1200 calories more than that at constant pressure at 300 K. Calculate the ratio of equilibrium constant Kp and Kc.

The concentration of a toxic substance in the solution is 2250 ppb. What will be the concentration of toxic in % (w/w) is:

a compound consist of three element p q r. atoms of elements p forms ccp lattice and those of element of q occupie 1/3 of tetrahedral voids and r occupiy 2/3 of octahedral voids formula of compounds formed by these elements

Atoms A present at edges, B at corners, C at body centres and D at faces. consider the body centre as the origin and the atoms present in the first octant are removed then find the formula.

How a dπ - dπ bond is formed