46295 + Interview Questions in Chemistry

1.	'lone pair electron on unsaturated atom do not take part in resonance.' what does unsaturated atom mean?
Answer» 'lone pair electron on unsaturated atom do not take part in resonance.' what does unsaturated atom mean?

Discussion

2.	The uncertainty principle was enunciated by
Answer» The uncertainty principle was enunciated by

2.

The uncertainty principle was enunciated by

Answer»

The uncertainty principle was enunciated by

Discussion

3.	How to find the number of electrons in the particular number of atoms.
Answer» How to find the number of electrons in the particular number of atoms.

Discussion

4.	19. Calculate the dipression in the freezing point of water when 10g of CH3CH2CHClCOOH is added to 250g of water. Ka = 1.4 × 10-3, Kf = 1.86 K kg/mol
Answer» 19. Calculate the dipression in the freezing point of water when 10g of CH3CH2CHClCOOH is added to 250g of water. Ka = 1.4 × 10-3, Kf = 1.86 K kg/mol

Discussion

5.	Calculate the mass of potassium chlorate required to liberate 6.72 dm3 of oxygen at STP
Answer» Calculate the mass of potassium chlorate required to liberate 6.72 dm³of oxygen at STP

Discussion

6.	The mass of cathode ray particle is:
Answer» The mass of cathode ray particle is:

Discussion

7.	(a) Write the functional groups present in an aldehyde and a carboxylic acid.(b) How would you distinguish between an alcohol and a carboxylic acid?(c) What happens when ethanoic acid is warmed with ethanol in the presence of a few drops of concentrated sulphuric acid? Write equation of the reaction involved.(d) What happens when a piece of sodium metal is added to ethanol? Write equation of the reaction which takes place.(e) Describe how ethene can be prepared from ethanol? Give an equation of the reaction and state the conditions.
Answer» (a) Write the functional groups present in an aldehyde and a carboxylic acid. (b) How would you distinguish between an alcohol and a carboxylic acid? (c) What happens when ethanoic acid is warmed with ethanol in the presence of a few drops of concentrated sulphuric acid? Write equation of the reaction involved. (d) What happens when a piece of sodium metal is added to ethanol? Write equation of the reaction which takes place. (e) Describe how ethene can be prepared from ethanol? Give an equation of the reaction and state the conditions.

Discussion

8.	does the reducing property increase or decrease from lithium to cesium (besides the exceptions)?
Answer» does the reducing property increase or decrease from lithium to cesium (besides the exceptions)?

Discussion

9.	Determine the value of equilibrium constant (K c ) and ΔG ∘ for the following reaction:Ni(s)+2Ag + (aq)→Ni 2+ (aq)+2Ag(s),E ∘ =1.05V(IF=96500mol −1 ))
Answer» Determine the value of equilibrium constant (K c ) and ΔG ∘ for the following reaction: Ni(s)+2Ag + (aq)→Ni 2+ (aq)+2Ag(s),E ∘ =1.05V (IF=96500mol −1 ))

Discussion

10.	Which of the following compounds consists of a homoleptic complex ?
Answer» Which of the following compounds consists of a homoleptic complex ?

Discussion

11.	The freezing point of a solution 50cm3 of ethylene glycol in 50 g water is found to be −34∘C. Assuming ideal behaviour, calculate the density of ethylene glycol(KfforH2O=1.86Kkgmol−1)Given:Molar mass of Ethylene glycol=62 g mol−1
Answer» The freezing point of a solution $50 c m^{3}$ of ethylene glycol in $50 g$ water is found to be ${- 34}^{\circ} C$ . Assuming ideal behaviour, calculate the density of ethylene glycol $(K_{f} f o r H_{2} O = 1.86 K k g m o l^{- 1}$ ) Given: $Molar mass of Ethylene glycol = 62 g m o l^{- 1}$

Discussion

12.	Difference between Mass and Weight?
Answer» Difference between Mass and Weight?

Discussion

13.	Find the words in the grill for the pictures given below.
Answer» Find the words in the grill for the pictures given below.

Discussion

14.	The number of geometrical isomers of the complex [Co(NO2)3(NH3)3] is
Answer» The number of geometrical isomers of the complex $[C o (N O_{2})_{3} (N H_{3})_{3}]$ is

Discussion

15.	Which of the following statement is not correct, for sigma and pi-bonds formed between two carbon atoms?
Answer» Which of the following statement is not correct, for sigma and pi-bonds formed between two carbon atoms?

Discussion

16.	Which of the following oxide formed when dinitrogen is heated with oxygen?
Answer» Which of the following oxide formed when dinitrogen is heated with oxygen?

Discussion

17.	Correct relation between dissociation constants of a di basic acid
Answer» Correct relation between dissociation constants of a di basic acid

Discussion

18.	Calculate the mass of K2Cr2O7 required to produce 254 g I2 from KI solution. K2Cr2O7+KI→Cr3++I2(Molar mass of K2Cr2O7 is 294 g mol−1)
Answer» Calculate the mass of $K_{2} C r_{2} O_{7}$ required to produce $254 g I_{2}$ from $K I$ solution. $K_{2} C r_{2} O_{7} + K I \to C r^{3 +} + I_{2}$ (Molar mass of $K_{2} C r_{2} O_{7}$ is $294 g m o l^{- 1}$ )

Discussion

19.	The parent chain of the following hydrocarbon is
Answer» The parent chain of the following hydrocarbon is

19.

The parent chain of the following hydrocarbon is

Answer»

The parent chain of the following hydrocarbon is

Discussion

20.	Dettol consists of
Answer» Dettol consists of

Discussion

21.	pure Si at 300 K has hole and electron densitie
Answer» pure Si at 300 K has hole and electron densitie

Discussion

22.	A solution of urea in water has a boiling point of 100.18∘C. Calculate the freezing point of the same solution. Molal depression and elevation constants for water Kf and Kb are 1.86∘C kg mol−1 and 0.512∘C kg mol−1 respectively.
Answer» A solution of urea in water has a boiling point of ${100.18}^{\circ} C .$ Calculate the freezing point of the same solution. Molal depression and elevation constants for water $K_{f}$ and $K_{b}$ are ${1.86}^{\circ} C k g m o l^{- 1}$ and ${0.512}^{\circ} C k g m o l^{- 1}$ respectively.

Discussion

23.	10% sites of a catalyst bed have adsorbed H2 (hydrogen gas) . On heating H2 gas is evolved from sitesites and collected at 0.03atm and 300K in a small vessel of 2.46cm3 . Number of sites available is 7.210 to the power 16 per cm2 and surface area is 1000cm2 .The number of surface sites occupied per molecule of H2 is (a) 1 (b) 2 (c) 3 (d)4
Answer» 10% sites of a catalyst bed have adsorbed H2 (hydrogen gas) . On heating H2 gas is evolved from sitesites and collected at 0.03atm and 300K in a small vessel of 2.46cm3 . Number of sites available is 7.210 to the power 16 per cm2 and surface area is 1000cm2 .The number of surface sites occupied per molecule of H2 is (a) 1 (b) 2 (c) 3 (d)4

Discussion

24.	Calculate the specific rotation of invert sugar given that [α]D=+52.7o for D-glucose and [α]D=−92.4o for D-fructose.
Answer» Calculate the specific rotation of invert sugar given that $[α]_{D} = + {52.7}^{o}$ for D-glucose and $[α]_{D} = - {92.4}^{o}$ for D-fructose.

Discussion

25.	how many geometrical isomers are possible for para-methylcyclohexane compound?
Answer» how many geometrical isomers are possible for para-methylcyclohexane compound?

Discussion

26.	The composition of the equilibrium mixture ( Cl2⇌2Cl), which is attained at 1200oC, is detrmined by measuring the rate of effusion through a pin-hole. It is observed that at 1.80 mm Hg pressure, the mixture effuses 1.183 times as fast as krypton effuses under the same conditions. Calculate the fraction of the chlorine molecules dissociated into atoms. (Given : Relative atomic mass of Kr=84, (1.183)2=1.4)
Answer» The composition of the equilibrium mixture ( $C l_{2} ⇌ 2 C l$ ), which is attained at $1200^{o} C$ , is detrmined by measuring the rate of effusion through a pin-hole. It is observed that at $1.80 mm$ Hg pressure, the mixture effuses $1.183$ times as fast as krypton effuses under the same conditions. Calculate the fraction of the chlorine molecules dissociated into atoms. (Given : Relative atomic mass of $K r = 84$ , $(1.183)^{2} = 1.4$ )

Discussion

27.	Four diatomic species are listed, identify the correct order in which the bond order is increasing in them.
Answer» Four diatomic species are listed, identify the correct order in which the bond order is increasing in them.

Discussion

28.	Calculate △Go for the following reaction at 298 K: CO(g)+(12)O2(g)→CO2(g);△Ho=−282.84 kJ/molGiven, SoCO2(g)=213.8 J K−1 mol−1, SoCO(g)=197.9 J K−1 mol−1,SoO2=205.0 J K−1 mol−1
Answer» Calculate $△ G^{o}$ for the following reaction at $298 K$ : $C O (g) + (\frac{1}{2}) O_{2} (g) \to C O_{2} (g); △ H^{o} = - 282.84 kJ/mol$ Given, $S_{C O_{2} (g)}^{o} = 213.8 {J K}^{- 1} {mol}^{- 1}, S_{C O (g)}^{o} = 197.9 {J K}^{- 1} {mol}^{- 1}, S_{O_{2}}^{o} = 205.0 {J K}^{- 1} {mol}^{- 1}$

Discussion

29.	Write IUPAC names of the following compounds: a.CH3CH=C(CH3)2 b.CH2=CH−C≡C−CH3 c. d. e. f. g.CH3−CH=CH−CH2−CH=CH−CH\|C2H5−CH2−CH=CH2
Answer» Write IUPAC names of the following compounds: $a . C H_{3} C H = C (C H_{3})_{2}$ $b . C H_{2} = C H - C \equiv C - C H_{3}$ $c .$ $d .$ $e .$ $f .$ $g . C H_{3} - C H = C H - C H_{2} - C H = C H - C H \| C_{2} H_{5} - C H_{2} - C H = C H_{2}$

29.

Write IUPAC names of the following compounds: a.CH3CH=C(CH3)2 b.CH2=CH−C≡C−CH3 c. d. e. f. g.CH3−CH=CH−CH2−CH=CH−CH|C2H5−CH2−CH=CH2

Answer»

Write IUPAC names of the following compounds:
$a . C H_{3} C H = C (C H_{3})_{2}$

$b . C H_{2} = C H - C \equiv C - C H_{3}$

$c .$

$d .$

$e .$

$f .$

$g . C H_{3} - C H = C H - C H_{2} - C H = C H - C H | C_{2} H_{5} - C H_{2} - C H = C H_{2}$

Discussion

30.	At higher altitude, boiling point of water is 95 oC. The mass in gram of NaCl (α=0.8) added to 100 g of water (Kb=0.52 K kg mol−1) in order to raise the boiling point to 100 oC is: (M.W of NaCl=58.5 u)
Answer» At higher altitude, boiling point of water is $95^{o} C$ . The mass in gram of $N a C l$ ( $α = 0.8$ ) added to $100 g$ of water $(K_{b} = 0.52 {K kg mol}^{- 1})$ in order to raise the boiling point to $100^{o} C$ is: $(M.W of N a C l = 58.5 u)$

Discussion

31.	In an atom, for how many electrons, the quantum numbers will be, n=3, l=2,. m=+ 2, s=+1/2 ? 1) 18 2) 6 3) 24 4) 1
Answer» In an atom, for how many electrons, the quantum numbers will be, n=3, l=2,. m=+ 2, s=+1/2 ? 1) 18 2) 6 3) 24 4) 1

Discussion

32.	is prop-2-isonitrile the correct iupac name?
Answer» is prop-2-isonitrile the correct iupac name?

Discussion

33.	In a spring-mass system, the mass in m and the spring constant is k. The critical damping coefficient of the system is 0.1 kg/s. In another spring-mass syste, the mass is is 2 m and the spring constant is 8 k. The critical damping coefficient (in kg/s) of this system is
Answer» In a spring-mass system, the mass in m and the spring constant is k. The critical damping coefficient of the system is 0.1 kg/s. In another spring-mass syste, the mass is is 2 m and the spring constant is 8 k. The critical damping coefficient (in kg/s) of this system is

Discussion

34.	{ The two ions }A^+ and }B^- have radii }40 pm and }120} pm respectively. In the closed packed crystal of }{ compound }AB , the coordination number of }A^+ would }} be
Answer» { The two ions }A^+ and }B^- have radii }40 pm and }120} pm respectively. In the closed packed crystal of }{ compound }AB , the coordination number of }A^+ would }} be

Discussion

35.	Which of the following are pairs of enantiomers?
Answer» Which of the following are pairs of enantiomers?

Discussion

36.	An industry discharges sewage into a river having flow rate of 8 m3/sec. BOD5 of sewage is 180 mg/l. Dissolved oxygen of the river before the sewage is discharged was 8.6 mg/l. The maximum permissible discharge(in lps rounded off to nearest integer) allowed into the river in order to maintain minimum D.O. for survival of aquatic life is9200
Answer» An industry discharges sewage into a river having flow rate of 8 $m^{3} / s e c$ . $B O D_{5}$ of sewage is 180 $m g / l$ . Dissolved oxygen of the river before the sewage is discharged was 8.6 $m g / l$ . The maximum permissible discharge(in lps rounded off to nearest integer) allowed into the river in order to maintain minimum D.O. for survival of aquatic life is 9200

Discussion

37.	Which type of drugs come under antimicrobial drugs?
Answer» Which type of drugs come under antimicrobial drugs?

Discussion

38.	33. Given standard electrode potentialsFe^{2+}+2e^-\longrightarrow Fe, E^°=-0⋅440V Fe^{2+}+2e^-\longrightarrow Fe, E^°=-0⋅440V, Fe3++3e-\longrightarrow FeE°=-0⋅036VFe3++3e-\longrightarrow Fe E^°=-0⋅036VThe standard electrode potential(E^°)(E^°)for Fe^{3+}+e^-\longrightarrow Fe^{2+}, Fe^{3+}+e^-\longrightarrow Fe^{2+}is :
Answer» 33. Given standard electrode potentialsFe^{2+}+2e^-\longrightarrow Fe, E^°=-0⋅440V Fe^{2+}+2e^-\longrightarrow Fe, E^°=-0⋅440V, Fe3++3e-\longrightarrow FeE°=-0⋅036VFe3++3e-\longrightarrow Fe E^°=-0⋅036VThe standard electrode potential(E^°)(E^°)for Fe^{3+}+e^-\longrightarrow Fe^{2+}, Fe^{3+}+e^-\longrightarrow Fe^{2+}is :

Discussion

39.

Match the following List-I List-II A. ECM 1. Errosion B. USM 2. Fusion and vaporization C. EDM 3. Vaporization and ablation D. LBM 4. Ion displacement

Answer» Match the following

	List-I		List-II
A.	ECM	1.	Errosion
B.	USM	2.	Fusion and vaporization
C.	EDM	3.	Vaporization and ablation
D.	LBM	4.	Ion displacement

Discussion

40.	51 The bond length of CO bond in carbon monoxide is 1.128 . The CO bond in Fe(CO) is (1) 1.158 (2) 1.128 (3) 3.28 (4) 1.118
Answer» 51 The bond length of CO bond in carbon monoxide is 1.128 . The CO bond in Fe(CO) is (1) 1.158 (2) 1.128 (3) 3.28 (4) 1.118

Discussion

41.	2 mole of PCl5 were introduced in a vessel of 5L capacity at a particular temperature. At equilibrium 35% PCl5 is dissociated into PCl3 and Cl2. The total no. Of moles at equilibrium is :-(1) 1.89 (2) 3.7(3) 1.33 (4) 2.7
Answer» 2 mole of PCl5 were introduced in a vessel of 5L capacity at a particular temperature. At equilibrium 35% PCl5 is dissociated into PCl3 and Cl2. The total no. Of moles at equilibrium is :- (1) 1.89 (2) 3.7 (3) 1.33 (4) 2.7

Discussion

42.	Correct the spellings.1. eskargot2. parfume3. Paaris4. Siene5. Fronce
Answer» Correct the spellings. 1. eskargot 2. parfume 3. Paaris 4. Siene 5. Fronce

Discussion

43.	What is neutral FeCl3
Answer» What is neutral FeCl3

Discussion

44.	The spectrum of white light ranges from
Answer» The spectrum of white light ranges from

Discussion

45.	Which has lowest freezing point at 1 atm? 1)0.1M NaCl solution 2)0.1M BaCl2 solution 3)0.1M sugar solution 4)0.1M FeCl3 solution
Answer» Which has lowest freezing point at 1 atm? 1)0.1M NaCl solution 2)0.1M BaCl2 solution 3)0.1M sugar solution 4)0.1M FeCl3 solution

45.

Which has lowest freezing point at 1 atm? 1)0.1M NaCl solution 2)0.1M BaCl2 solution 3)0.1M sugar solution 4)0.1M FeCl3 solution

Answer»

Which has lowest freezing point at 1 atm?

1)0.1M NaCl solution

2)0.1M BaCl2 solution

3)0.1M sugar solution

4)0.1M FeCl3 solution

Discussion

46.	2x²-7x+3=0
Answer» 2x²-7x+3=0

Discussion

47.	How to sn1 or sn2
Answer» How to sn1 or sn2

Discussion

48.	Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. (CH3)2CHNH2 CH3(CH2)2NH2 CH3NHCH(CH3)2 (CH3)3CNH2 C6H5NHCH3 (CH3CH2)2NCH3
Answer» Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. $(C H_{3})_{2} C H N H_{2}$ $C H_{3} (C H_{2})_{2} N H_{2}$ $C H_{3} N H C H (C H_{3})_{2}$ $(C H_{3})_{3} C N H_{2}$ $C_{6} H_{5} N H C H_{3}$ $(C H_{3} C H_{2})_{2} N C H_{3}$

48.

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. (CH3)2CHNH2 CH3(CH2)2NH2 CH3NHCH(CH3)2 (CH3)3CNH2 C6H5NHCH3 (CH3CH2)2NCH3

Answer»

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines.

$(C H_{3})_{2} C H N H_{2}$

$C H_{3} (C H_{2})_{2} N H_{2}$

$C H_{3} N H C H (C H_{3})_{2}$

$(C H_{3})_{3} C N H_{2}$

$C_{6} H_{5} N H C H_{3}$

$(C H_{3} C H_{2})_{2} N C H_{3}$

Discussion

49.	The compound/s which react/s and soluble in excess of hot conc.NaOH solution is/are
Answer» The compound/s which react/s and soluble in excess of hot conc.NaOH solution is/are

Discussion

50.	Upon heating with Cu2S, the reagent(s) that give copper metal is/are (IIT-JEE, Advanced 2014)
Answer» Upon heating with $C u_{2} S,$ the reagent(s) that give copper metal is/are (IIT-JEE, Advanced 2014)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

'lone pair electron on unsaturated atom do not take part in resonance.' what does unsaturated atom mean?

The uncertainty principle was enunciated by

How to find the number of electrons in the particular number of atoms.

19. Calculate the dipression in the freezing point of water when 10g of CH3CH2CHClCOOH is added to 250g of water. Ka = 1.4 × 10-3, Kf = 1.86 K kg/mol

Calculate the mass of potassium chlorate required to liberate 6.72 dm​​​​​3 of oxygen at STP

The mass of cathode ray particle is:

does the reducing property increase or decrease from lithium to cesium (besides the exceptions)?

Determine the value of equilibrium constant (K c​ ) and ΔG ∘ for the following reaction:Ni(s)+2Ag + (aq)→Ni 2+ (aq)+2Ag(s),E ∘ =1.05V(IF=96500mol −1 ))

Which of the following compounds consists of a homoleptic complex ?

The freezing point of a solution 50cm3 of ethylene glycol in 50 g water is found to be −34∘C. Assuming ideal behaviour, calculate the density of ethylene glycol(KfforH2O=1.86Kkgmol−1)Given:Molar mass of Ethylene glycol=62 g mol−1

Difference between Mass and Weight?

Find the words in the grill for the pictures given below.

The number of geometrical isomers of the complex [Co(NO2)3(NH3)3] is

Which of the following statement is not correct, for sigma and pi-bonds formed between two carbon atoms?

Which of the following oxide formed when dinitrogen is heated with oxygen?

Correct relation between dissociation constants of a di basic acid

Calculate the mass of K2Cr2O7 required to produce 254 g I2 from KI solution. K2Cr2O7+KI→Cr3++I2(Molar mass of K2Cr2O7 is 294 g mol−1)

The parent chain of the following hydrocarbon is

Dettol consists of

pure Si at 300 K has hole and electron densitie

A solution of urea in water has a boiling point of 100.18∘C. Calculate the freezing point of the same solution. Molal depression and elevation constants for water Kf and Kb are 1.86∘C kg mol−1 and 0.512∘C kg mol−1 respectively.

Calculate the specific rotation of invert sugar given that [α]D=+52.7o for D-glucose and [α]D=−92.4o for D-fructose.

how many geometrical isomers are possible for para-methylcyclohexane compound?

Four diatomic species are listed, identify the correct order in which the bond order is increasing in them.

Calculate △Go for the following reaction at 298 K: CO(g)+(12)O2(g)→CO2(g);△Ho=−282.84 kJ/molGiven, SoCO2(g)=213.8 J K−1 mol−1, SoCO(g)=197.9 J K−1 mol−1,SoO2=205.0 J K−1 mol−1

Write IUPAC names of the following compounds: a.CH3CH=C(CH3)2 b.CH2=CH−C≡C−CH3 c. d. e. f. g.CH3−CH=CH−CH2−CH=CH−CH|C2H5−CH2−CH=CH2

At higher altitude, boiling point of water is 95 oC. The mass in gram of NaCl (α=0.8) added to 100 g of water (Kb=0.52 K kg mol−1) in order to raise the boiling point to 100 oC is: (M.W of NaCl=58.5 u)

In an atom, for how many electrons, the quantum numbers will be, n=3, l=2,. m=+ 2, s=+1/2 ? 1) 18 2) 6 3) 24 4) 1

is prop-2-isonitrile the correct iupac name?

In a spring-mass system, the mass in m and the spring constant is k. The critical damping coefficient of the system is 0.1 kg/s. In another spring-mass syste, the mass is is 2 m and the spring constant is 8 k. The critical damping coefficient (in kg/s) of this system is

{ The two ions }A^+ and }B^- have radii }40 pm and }120} pm respectively. In the closed packed crystal of }{ compound }AB , the coordination number of }A^+ would }} be

Which of the following are pairs of enantiomers?

Which type of drugs come under antimicrobial drugs?

Match the following List-I List-II A. ECM 1. Errosion B. USM 2. Fusion and vaporization C. EDM 3. Vaporization and ablation D. LBM 4. Ion displacement

51 The bond length of CO bond in carbon monoxide is 1.128 . The CO bond in Fe(CO) is (1) 1.158 (2) 1.128 (3) 3.28 (4) 1.118

2 mole of PCl5 were introduced in a vessel of 5L capacity at a particular temperature. At equilibrium 35% PCl5 is dissociated into PCl3 and Cl2. The total no. Of moles at equilibrium is :-(1) 1.89 (2) 3.7(3) 1.33 (4) 2.7

Correct the spellings.1. eskargot2. parfume3. Paaris4. Siene5. Fronce

What is neutral FeCl3

The spectrum of white light ranges from

Which has lowest freezing point at 1 atm? 1)0.1M NaCl solution 2)0.1M BaCl2 solution 3)0.1M sugar solution 4)0.1M FeCl3 solution

2x²-7x+3=0

How to sn1 or sn2

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. (CH3)2CHNH2 CH3(CH2)2NH2 CH3NHCH(CH3)2 (CH3)3CNH2 C6H5NHCH3 (CH3CH2)2NCH3

The compound/s which react/s and soluble in excess of hot conc.NaOH solution is/are

Upon heating with Cu2S, the reagent(s) that give copper metal is/are (IIT-JEE, Advanced 2014)

Calculate the mass of potassium chlorate required to liberate 6.72 dm3 of oxygen at STP

Determine the value of equilibrium constant (K c ) and ΔG ∘ for the following reaction:Ni(s)+2Ag + (aq)→Ni 2+ (aq)+2Ag(s),E ∘ =1.05V(IF=96500mol −1 ))