46295 + Interview Questions in Chemistry

1.	46. The decomposition of KClO3 (s) on heating takes place as KClO3----->KCl + O2 KClO3------->KClO4 +KCl If 2 gm of sample of KClO3 on decomposition gives 224 my of O2 at STP then calculate the percentage by mass of KCl in the residue
Answer» 46. The decomposition of KClO3 (s) on heating takes place as KClO3----->KCl + O2 KClO3------->KClO4 +KCl If 2 gm of sample of KClO3 on decomposition gives 224 my of O2 at STP then calculate the percentage by mass of KCl in the residue

Discussion

2.	A particle originally at rest of the highest point of a smooth vertical circle is slightly displaced. It will leave the circle at a vertical distance h below the highest point such that
Answer» A particle originally at rest of the highest point of a smooth vertical circle is slightly displaced. It will leave the circle at a vertical distance h below the highest point such that

Discussion

3.	Distance of partical when x=t2-4t +5 when time is given between t=0 to t=3
Answer» Distance of partical when x=t2-4t +5 when time is given between t=0 to t=3

Discussion

4.	8. Which of the following molecule has max dipole moment? 1. CO2 2. CH4 3. NH3 4. NF3
Answer» 8. Which of the following molecule has max dipole moment? 1. $C O_{2}$ 2. $C H_{4}$ 3. $N H_{3}$ 4. $N F_{3}$

4.

8. Which of the following molecule has max dipole moment? 1. CO2 2. CH4 3. NH3 4. NF3

Answer»

8. Which of the following molecule has max dipole moment?

1. $C O_{2}$

2. $C H_{4}$

3. $N H_{3}$

4. $N F_{3}$

Discussion

5.	how does concentration affect molar conductivity?
Answer» how does concentration affect molar conductivity?

Discussion

6.	what will be the equivalent mass if HCl in following reaction: Zn{(OH)}_{2 }+2HCl → ZnCl_{2 }+2H_2O
Answer» what will be the equivalent mass if HCl in following reaction: Zn{(OH)}_{2 }+2HCl → ZnCl_{2 }+2H_2O

Discussion

7.	A solid is made up of atoms P and Q. Q are in ccp arrangement while P occupy all the tetrahedral voids. Co ordination number of Q is
Answer» A solid is made up of atoms P and Q. Q are in ccp arrangement while P occupy all the tetrahedral voids. Co ordination number of Q is

Discussion

8.	The size of isoelectronic species F⊖, Ne and Na⊕ is affected by
Answer» The size of isoelectronic species $F^{⊖}$ , $N e$ and $N a^{\oplus}$ is affected by

Discussion

9.	calculate the volume of water to be added to 400ml of seminormal HCl solution to make it decinormal
Answer» calculate the volume of water to be added to 400ml of seminormal HCl solution to make it decinormal

Discussion

10.	when 0.532g of benzene C6H6 ,is burnt with excess of oxygen at a constant volume, 22.3kJ of heat is given out. calculate delH for the combustion process (R=8.314J/K/mol , boiling point 535K.
Answer» when 0.532g of benzene C6H6 ,is burnt with excess of oxygen at a constant volume, 22.3kJ of heat is given out. calculate delH for the combustion process (R=8.314J/K/mol , boiling point 535K.

Discussion

11.	The final product obtained in the reaction
Answer» The final product obtained in the reaction

Discussion

12.	The ionisation constant of organic acid RCOOH at 25°C is 10^-6 .The equilibrium constant of hydrolysis of RCOO- is
Answer» The ionisation constant of organic acid RCOOH at 25°C is 10^-6 .The equilibrium constant of hydrolysis of RCOO- is

Discussion

13.	Gauche form is more stable than Antiform in 2 floroethanol Ethane-1,2 diol Ethane Both 1 and 2
Answer» Gauche form is more stable than Antiform in 2 floroethanol Ethane-1,2 diol Ethane Both 1 and 2

Discussion

14.	The correct order of radii is:
Answer» The correct order of radii is:

Discussion

15.	Method used for the concentration of tin ore is
Answer» Method used for the concentration of tin ore is

Discussion

16.	The IUPAC name of CH2=CHCH2Br is:
Answer» The IUPAC name of CH₂=CHCH₂Br is:

Discussion

17.	what points of stretched string between the fixed points must be plucked and touched to exite its second harmonic??
Answer» what points of stretched string between the fixed points must be plucked and touched to exite its second harmonic??

Discussion

18.	Why CCL4 cannot be hydrolysed.Elaborately?
Answer» Why CCL4 cannot be hydrolysed.Elaborately?

Discussion

19.	Which of the following compounds undergo aldol condensation ?
Answer» Which of the following compounds undergo aldol condensation ?

Discussion

20.	Which of the following cyclopentane derivatives has plane of symmetry?
Answer» Which of the following cyclopentane derivatives has plane of symmetry?

Discussion

21.	33. Suppose the elements X and Y combine to form two compounds XY2 X3Y2.when o.1 mole of XY2weighs 10g and o.o5mole of X3Y2 weight 9g,the atomic weights of X and Y are??
Answer» 33. Suppose the elements X and Y combine to form two compounds XY2 X3Y2.when o.1 mole of XY2weighs 10g and o.o5mole of X3Y2 weight 9g,the atomic weights of X and Y are??

Discussion

22.	Which of the following compounds has the lowest pKa?
Answer» Which of the following compounds has the lowest $p K_{a}$ ?

Discussion

23.	Which of the following alkyl halides will react more quickly in the E1 reaction ?
Answer» Which of the following alkyl halides will react more quickly in the $E 1$ reaction ?

Discussion

24.	Compounds A and C in the following reaction are CH3CHO(i) CH3MgBr−−−−−−−−→(ii) H2O(A)H2SO4,Δ−−−−−−→(B)(i) Hydroboration−−−−−−−−−−−→(ii) Oxidation(C)
Answer» Compounds A and C in the following reaction are $C H_{3} C H O (i) C H_{3} M g B r - ------- \to (i i) H_{2} O (A) H_{2} S O_{4}, Δ - ----- \to (B) (i) H y d r o b o r a t i o n - ---------- \to (i i) O x i d a t i o n (C)$

24.

Compounds A and C in the following reaction are CH3CHO(i) CH3MgBr−−−−−−−−→(ii) H2O(A)H2SO4,Δ−−−−−−→(B)(i) Hydroboration−−−−−−−−−−−→(ii) Oxidation(C)

Answer»

Compounds A and C in the following reaction are

$C H_{3} C H O (i) C H_{3} M g B r - ------- \to (i i) H_{2} O (A) H_{2} S O_{4}, Δ - ----- \to (B) (i) H y d r o b o r a t i o n - ---------- \to (i i) O x i d a t i o n (C)$

Discussion

25.	46. What is HgOAc ,the compound that is used in oxymercuretion -demercuration reaction preparation of alcohol?
Answer» 46. What is HgOAc ,the compound that is used in oxymercuretion -demercuration reaction preparation of alcohol?

Discussion

26.	79 The most stable alkene is (1) CH2 double bond CH-CH2-CH3 (2) CH2 double bond C(CH3)- CH double bond CH2 (3) CH2 double bond CH-CH double bond CH2 (4) CH3-CH double bond CH-CH3
Answer» 79 The most stable alkene is (1) CH2 double bond CH-CH2-CH3 (2) CH2 double bond C(CH3)- CH double bond CH2 (3) CH2 double bond CH-CH double bond CH2 (4) CH3-CH double bond CH-CH3

Discussion

27.	What is the meaning of precision and accurate
Answer» What is the meaning of precision and accurate

Discussion

28.	How many resonance structures are possible in O3?
Answer» How many resonance structures are possible in $O_{3}$ ?

Discussion

29.	Which of the following on hydrolysis can give methane A) Al4C3 B) Be2C C) CaC2 D) CH3MgCl
Answer» Which of the following on hydrolysis can give methane A) $A l_{4} C_{3}$ B) $B e_{2} C$ C) Ca $C_{2}$ D) $C H_{3} M g C l$

29.

Which of the following on hydrolysis can give methane A) Al4C3 B) Be2C C) CaC2 D) CH3MgCl

Answer»

Which of the following on hydrolysis can give methane

A) $A l_{4} C_{3}$ B) $B e_{2} C$ C) Ca $C_{2}$ D) $C H_{3} M g C l$

Discussion

30.	Consider the following reaction:C2H5OH + H2SO4 → Product. Among the following, which one cannot be formed as a product under any conditions?
Answer» Consider the following reaction:C₂H₅OH + H₂SO₄→ Product. Among the following, which one cannot be formed as a product under any conditions?

30.

Consider the following reaction:C2H5OH + H2SO4 → Product. Among the following, which one cannot be formed as a product under any conditions?

Answer»

Consider the following reaction:C₂H₅OH + H₂SO₄→ Product.

Among the following, which one cannot be formed as a product under any conditions?

Discussion

31.	Avogadro's law determines ___ and the molecular formula of the gas.
Answer» Avogadro's law determines ___ and the molecular formula of the gas.

Discussion

32.	Isobutene is the exclusive product of dehydrohalogenation (by a strong base) of
Answer» Isobutene is the exclusive product of dehydrohalogenation (by a strong base) of

Discussion

33.	The correct set of oxidation numbers of nitrogen in ammonium nitrate is:
Answer» The correct set of oxidation numbers of nitrogen in ammonium nitrate is:

Discussion

34.	Why is CO a stronger ligand than Cl-?
Answer» Why is CO a stronger ligand than Cl-?

Discussion

35.	9.2g of N2O4(g) is taken in a closed one litre vessel and heated till the following equilibrium is reachedN2O4(g)⇌2NO2(g)At equilibrium 50% of N2O4(g) is dissociated. What is the equilibrium constant? [in mole lit−1] [M.wt. of N2O4 is 92]
Answer» $9.2 g$ of $N_{2} O_{4} (g)$ is taken in a closed one litre vessel and heated till the following equilibrium is reached $N_{2} O_{4} (g) ⇌ 2 N O_{2} (g)$ At equilibrium $50 %$ of $N_{2} O_{4} (g)$ is dissociated. What is the equilibrium constant? [in ${mole lit}^{- 1}$ ] [M.wt. of $N_{2} O_{4} is 92$ ]

Discussion

36.	Describe how does the enthalpy of reaction remain unchanged when a catalyst is used in the reaction?
Answer» Describe how does the enthalpy of reaction remain unchanged when a catalyst is used in the reaction?

Discussion

37.	On dissolving 10.8 g glucose (molar weight = 180 g/mol) in 240 g of water, its boiling point increases by 0.13∘C. Calculate the molal elevation constant of water.
Answer» On dissolving $10.8 g$ glucose (molar weight = $180 g / m o l$ ) in $240 g$ of water, its boiling point increases by ${0.13}^{\circ} C$ . Calculate the molal elevation constant of water.

Discussion

38.	ntThe solubility of AgCl will be minimum inn ntA. 0.01M CaCl2n ntB. Pure Watern ntC. 0.001M AgNO3n ntD. 0.01M NaCln
Answer» ntThe solubility of AgCl will be minimum inn ntA. 0.01M CaCl2n ntB. Pure Watern ntC. 0.001M AgNO3n ntD. 0.01M NaCln

Discussion

39.	Choose the correct order of basicity of the following compounds :
Answer» Choose the correct order of basicity of the following compounds :

Discussion

40.	IUPAC name of K3Fe(C2O4)3 is:
Answer» IUPAC name of $K_{3} [Fe {(C_{2} O_{4})}_{3}]$ is:

Discussion

41.	What is final molarity of 30% (w/w) H2O2 aqueous solution, having density 1.11 g/ml, if the solution is diluted to triple the initial volume?
Answer» What is final molarity of $30 %$ (w/w) $H_{2} O_{2}$ aqueous solution, having density $1.11 g/ml$ , if the solution is diluted to triple the initial volume?

Discussion

42.	The henry law cons†an t for the solubility of N2 gas in water at 298K is1.0 ×10 raise to the power 5. The mole fraction of N2 gas in air is 0.8.The number of moles of N2 from air dissloved in 10 moles of water at 298 K and 5 atm pressure is
Answer» The henry law cons†an t for the solubility of N2 gas in water at 298K is1.0 ×10 raise to the power 5. The mole fraction of N2 gas in air is 0.8.The number of moles of N2 from air dissloved in 10 moles of water at 298 K and 5 atm pressure is

Discussion

43.	The number of revolutions made by electron in one second in the 2nd Bohr orbit of hydrogen atom is:
Answer» The number of revolutions made by electron in one second in the 2^nd Bohr orbit of hydrogen atom is:

Discussion

44.	The pi bond between Cl- O in ClO4- is formed by the overlapping of _____ orbital
Answer» The pi bond between Cl- O in ClO4- is formed by the overlapping of _____ orbital

Discussion

45.	what is the difference between stoichiometric defect and non stoichiometric defects?
Answer» what is the difference between stoichiometric defect and non stoichiometric defects?

Discussion

46.	The correct order of negative elctron gain enthalpies of O,F,and Cl
Answer» The correct order of negative elctron gain enthalpies of O,F,and Cl

Discussion

47.	What is the IUPAC name of the compound C6H5O(CH2)6CH3?
Answer» What is the IUPAC name of the compound C₆H₅O(CH₂)₆CH_3?

Discussion

48.	The halo compound having two same halogen atoms on same carbon are known as:
Answer» The halo compound having two same halogen atoms on same carbon are known as:

Discussion

49.	When a certain metal was irradiated with light of frequency 4.0 × 1016 s−1, the photoelectrons emitted had three times the kinetic energy as the kinetic energy of photoelectrons emitted when the metal was irradicated with light of frequency 2.0 × 1016s−1. Calculate the critical frequency (ν0) of the metal.
Answer» When a certain metal was irradiated with light of frequency $4.0 \times 10^{16} s^{- 1}$ , the photoelectrons emitted had three times the kinetic energy as the kinetic energy of photoelectrons emitted when the metal was irradicated with light of frequency $2.0 \times 10^{16} s^{- 1}$ . Calculate the critical frequency ( $ν_{0}$ ) of the metal.

Discussion

50.	5A2+2B4→2AB2+4A2B The minimum mass of mixture of A2 and B4 in grams required to produce at least 1 kg of each product is: (Given atomic mass of ′A′=10; Atomic mass of ′B′=120)
Answer» $5 A_{2} + 2 B_{4} \to 2 A B_{2} + 4 A_{2} B$ The minimum mass of mixture of $A_{2}$ and $B_{4}$ in grams required to produce at least $1 kg$ of each product is: (Given atomic mass of $^{'} A^{'} = 10$ ; Atomic mass of $^{'} B^{'} = 120$ )

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

46. The decomposition of KClO3 (s) on heating takes place as KClO3----->KCl + O2 KClO3------->KClO4 +KCl If 2 gm of sample of KClO3 on decomposition gives 224 my of O2 at STP then calculate the percentage by mass of KCl in the residue

A particle originally at rest of the highest point of a smooth vertical circle is slightly displaced. It will leave the circle at a vertical distance h below the highest point such that

Distance of partical when x=t2-4t +5 when time is given between t=0 to t=3

8. Which of the following molecule has max dipole moment? 1. CO2 2. CH4 3. NH3 4. NF3

how does concentration affect molar conductivity?

what will be the equivalent mass if HCl in following reaction: Zn{(OH)}_{2 }+2HCl → ZnCl_{2 }+2H_2O

A solid is made up of atoms P and Q. Q are in ccp arrangement while P occupy all the tetrahedral voids. Co ordination number of Q is

The size of isoelectronic species F⊖, Ne and Na⊕ is affected by

calculate the volume of water to be added to 400ml of seminormal HCl solution to make it decinormal

when 0.532g of benzene C6H6 ,is burnt with excess of oxygen at a constant volume, 22.3kJ of heat is given out. calculate delH for the combustion process (R=8.314J/K/mol , boiling point 535K.

The final product obtained in the reaction

The ionisation constant of organic acid RCOOH at 25°C is 10^-6 .The equilibrium constant of hydrolysis of RCOO- is

Gauche form is more stable than Antiform in 2 floroethanol Ethane-1,2 diol Ethane Both 1 and 2

The correct order of radii is:

Method used for the concentration of tin ore is

The IUPAC name of CH2=CHCH2Br is:

what points of stretched string between the fixed points must be plucked and touched to exite its second harmonic??

Why CCL4 cannot be hydrolysed.Elaborately?

Which of the following compounds undergo aldol condensation ?

Which of the following cyclopentane derivatives has plane of symmetry?

33. Suppose the elements X and Y combine to form two compounds XY2 X3Y2.when o.1 mole of XY2weighs 10g and o.o5mole of X3Y2 weight 9g,the atomic weights of X and Y are??

Which of the following compounds has the lowest pKa?

Which of the following alkyl halides will react more quickly in the E1 reaction ?

Compounds A and C in the following reaction are CH3CHO(i) CH3MgBr−−−−−−−−→(ii) H2O(A)H2SO4,Δ−−−−−−→(B)(i) Hydroboration−−−−−−−−−−−→(ii) Oxidation(C)

46. What is HgOAc ,the compound that is used in oxymercuretion -demercuration reaction preparation of alcohol?

79 The most stable alkene is (1) CH2 double bond CH-CH2-CH3 (2) CH2 double bond C(CH3)- CH double bond CH2 (3) CH2 double bond CH-CH double bond CH2 (4) CH3-CH double bond CH-CH3

What is the meaning of precision and accurate

How many resonance structures are possible in O3?

Which of the following on hydrolysis can give methane A) Al4C3 B) Be2C C) CaC2 D) CH3MgCl

Consider the following reaction:C2H5OH + H2SO4 → Product. Among the following, which one cannot be formed as a product under any conditions?

Avogadro's law determines ___ and the molecular formula of the gas.

Isobutene is the exclusive product of dehydrohalogenation (by a strong base) of

The correct set of oxidation numbers of nitrogen in ammonium nitrate is:

Why is CO a stronger ligand than Cl-?

9.2g of N2O4(g) is taken in a closed one litre vessel and heated till the following equilibrium is reachedN2O4(g)⇌2NO2(g)At equilibrium 50% of N2O4(g) is dissociated. What is the equilibrium constant? [in mole lit−1] [M.wt. of N2O4 is 92]

Describe how does the enthalpy of reaction remain unchanged when a catalyst is used in the reaction?

On dissolving 10.8 g glucose (molar weight = 180 g/mol) in 240 g of water, its boiling point increases by 0.13∘C. Calculate the molal elevation constant of water.

ntThe solubility of AgCl will be minimum inn ntA. 0.01M CaCl2n ntB. Pure Watern ntC. 0.001M AgNO3n ntD. 0.01M NaCln

Choose the correct order of basicity of the following compounds :

IUPAC name of K3Fe(C2O4)3 is:

What is final molarity of 30% (w/w) H2O2 aqueous solution, having density 1.11 g/ml, if the solution is diluted to triple the initial volume?

The henry law cons†an t for the solubility of N2 gas in water at 298K is1.0 ×10 raise to the power 5. The mole fraction of N2 gas in air is 0.8.The number of moles of N2 from air dissloved in 10 moles of water at 298 K and 5 atm pressure is

The number of revolutions made by electron in one second in the 2nd Bohr orbit of hydrogen atom is:

The pi bond between Cl- O in ClO4- is formed by the overlapping of _____ orbital

what is the difference between stoichiometric defect and non stoichiometric defects?

The correct order of negative elctron gain enthalpies of O,F,and Cl

What is the IUPAC name of the compound C6H5O(CH2)6CH3?

The halo compound having two same halogen atoms on same carbon are known as:

5A2+2B4→2AB2+4A2B The minimum mass of mixture of A2 and B4 in grams required to produce at least 1 kg of each product is: (Given atomic mass of ′A′=10; Atomic mass of ′B′=120)