46295 + Interview Questions in Chemistry

1.	65. Find the molality of 90% by volume H2SO4 (specific gravity of H2SO4 solution =1.98 g/ml)
Answer» 65. Find the molality of 90% by volume H2SO4 (specific gravity of H2SO4 solution =1.98 g/ml)

Discussion

2.	Which of the following is a primary amine[AMU 1988]
Answer» Which of the following is a primary amine [AMU 1988]

2.

Which of the following is a primary amine[AMU 1988]

Answer»

Which of the following is a primary amine

[AMU 1988]

Discussion

3.	The composition of 'Golden spangles' is:
Answer» The composition of 'Golden spangles' is:

Discussion

4.	The orbital angular momentum of 3P electron is
Answer» The orbital angular momentum of 3P electron is

Discussion

5.	how many cyclic Isomerism are present in C3H6O
Answer» how many cyclic Isomerism are present in C3H6O

Discussion

6.	In the chemical reaction} K2Cr2O7+aH2SO4+bSO2 gives K2SO4+Cr2(SO4)3+cH2O a, b and c are
Answer» In the chemical reaction} K2Cr2O7+aH2SO4+bSO2 gives K2SO4+Cr2(SO4)3+cH2O a, b and c are

Discussion

7.	Predict condition under which Al might be expected to reduce MgO.
Answer» Predict condition under which Al might be expected to reduce MgO.

Discussion

8.	X mL of H2 gas effuses through a hole in a container in 5 sec. The time taken for the effusion of the same volume of the gas specified below under identical conditions is:
Answer» $X mL$ of $H_{2}$ gas effuses through a hole in a container in 5 sec. The time taken for the effusion of the same volume of the gas specified below under identical conditions is:

Discussion

9.	I am not able to solve the problems regarding nernst equations.
Answer» I am not able to solve the problems regarding nernst equations.

Discussion

10.	The organic chloro compound, which shows complete stereochemical inversion during a SN2 reaction, is
Answer» The organic chloro compound, which shows complete stereochemical inversion during a $S_{N} 2$ reaction, is

Discussion

11.	The molal elevation constant of water is 0.51. The boiling point of O.1 molal aqueous NaCl solution isnearly :(1) 100.05 ℃ (2)100.1 ℃(3) 100.2^° C(4) 101.0^° C
Answer» The molal elevation constant of water is 0.51. The boiling point of O.1 molal aqueous NaCl solution isnearly :(1) 100.05 ℃ (2)100.1 ℃(3) 100.2^° C(4) 101.0^° C

Discussion

12.	33. Compare reactivity of acid chloride and ketone with grignard reagent
Answer» 33. Compare reactivity of acid chloride and ketone with grignard reagent

Discussion

13.	Find the major product in the following reaction. CH3−O\|\|CHZn−Hg−−−−−−→Conc. HCl
Answer» Find the major product in the following reaction. $C H_{3} - O \| \| C H Z n - H g - ----- \to C o n c . H C l$

Discussion

14.	What is the valency of oxygen in the CO2 molecule?
Answer» What is the valency of oxygen in the $C O_{2}$ molecule?

Discussion

15.	CH3CH2OH react with CH3MgBr product is....... Please please show the reaction mechanism....
Answer» CH3CH2OH react with CH3MgBr product is....... Please please show the reaction mechanism....

Discussion

16.	The molar specific heat at constant volume of an ideal gas is equal to 2.5 times the universal gas constant (8.314 J/mol-K). When the temperature increases by 100 K, the change in molar specific enthalpy is J/mol.2909.9
Answer» The molar specific heat at constant volume of an ideal gas is equal to 2.5 times the universal gas constant (8.314 J/mol-K). When the temperature increases by 100 K, the change in molar specific enthalpy is J/mol. 2909.9

Discussion

17.	ntEqual moles of benzene and toluene are mixed , the vapour pressure of benzene and toluene in pure state are 700 mm and 600 mm Hg . The mole fraction of benzene in vapour state is?n
Answer» ntEqual moles of benzene and toluene are mixed , the vapour pressure of benzene and toluene in pure state are 700 mm and 600 mm Hg . The mole fraction of benzene in vapour state is?n

Discussion

18.	34. What is ionization enthalpy?
Answer» 34. What is ionization enthalpy?

Discussion

19.	Structures of glycine and alanine are given below. Show the peptide linkage in glycylalanine. H2N−CH2−COOH ; H2N−(Glycince)CH\|CH3(Alanine)-COOH
Answer» Structures of glycine and alanine are given below. Show the peptide linkage in glycylalanine. $H_{2} N - C H_{2} - C O O H; H_{2} N - (G l y c i n c e) C H \| C H_{3} (A l a n i n e)$ -COOH

Discussion

20.	14. when mixture of 2 alkyl halide reacts with sodium metal in dry ether, mixture of 2 methyl propane , Ethane and 2,3-dimethyl butane was obtained the alkyl halides are
Answer» 14. when mixture of 2 alkyl halide reacts with sodium metal in dry ether, mixture of 2 methyl propane , Ethane and 2,3-dimethyl butane was obtained the alkyl halides are

Discussion

21.	15.why Fe[(NH3)6] +2 does not have d 2sp 3 hybridization and have sp 3d 2 hybridization
Answer» 15.why Fe[(NH3)6] +2 does not have d 2sp 3 hybridization and have sp 3d 2 hybridization

Discussion

22.	When light of 500nm wavelength falls on the surface of a metal, electrons are ejacted with velocity 6×10^4 m/s. Calculate the work function of the metal.
Answer» When light of 500nm wavelength falls on the surface of a metal, electrons are ejacted with velocity 6×10^4 m/s. Calculate the work function of the metal.

Discussion

23.	Which of the following is not a nucleophile?
Answer» Which of the following is not a nucleophile?

Discussion

24.	Let p, q ,r s represent the following propositions ,p:xϵ{8, 9, 10, 11, 12}q : x is a composite numberr: x is a perfect squares: x is a prime numberThe integer x ≥ 2 with satisfies ⇁((p⇒q)∧(⇁r∨⇁s)) is11
Answer» Let p, q ,r s represent the following propositions , $p : x ϵ$ {8, 9, 10, 11, 12} q : x is a composite number r: x is a perfect square s: x is a prime number The integer x $\geq$ 2 with satisfies $⇁ ((p \Rightarrow q) \land (⇁ r \lor ⇁ s))$ is 11

24.

Let p, q ,r s represent the following propositions ,p:xϵ{8, 9, 10, 11, 12}q : x is a composite numberr: x is a perfect squares: x is a prime numberThe integer x ≥ 2 with satisfies ⇁((p⇒q)∧(⇁r∨⇁s)) is11

Answer»

Let p, q ,r s represent the following propositions ,

$p : x ϵ$ {8, 9, 10, 11, 12}

q : x is a composite number

r: x is a perfect square

s: x is a prime number

The integer x $\geq$ 2 with satisfies $⇁ ((p \Rightarrow q) \land (⇁ r \lor ⇁ s))$ is

11

Discussion

25.	What is the difference between basic strength and basicity of a base??
Answer» What is the difference between basic strength and basicity of a base??

Discussion

26.	What is equivalent mass
Answer» What is equivalent mass

Discussion

27.	The number of tetrahedral voids in a FCC lattice is
Answer» The number of tetrahedral voids in a FCC lattice is

Discussion

28.	Which of the following is a bacteriostatic?
Answer» Which of the following is a bacteriostatic?

Discussion

29.	Which of the following compounds is polar covalent compound?
Answer» Which of the following compounds is polar covalent compound?

Discussion

30.	State the merits of Mendeleev's classification of elements.
Answer» State the merits of Mendeleev's classification of elements.

Discussion

31.	Using the data (all value are in kilocalorie per mole at 25∘C ) given below, the bond energy of C−C and bond C−H bond is m kcal and n kcal, respectively. Calculate the value of m+n ΔH∘combustion~of~ethane=−372.0ΔH∘Combustion of propane=−530.0ΔH∘forC(graphite)→C(g)=+172.0Bond energy of H - H bond=+104.0ΔH∘f of H2O(l)=−68.0ΔH∘f of CO2(g)=−94.0
Answer» Using the data (all value are in kilocalorie per mole at $25^{\circ} C$ ) given below, the bond energy of $C - C$ and bond $C - H$ bond is $m k c a l$ and $n k c a l$ , respectively. Calculate the value of $m + n$ $Δ H_{combustion~of~ethane}^{\circ} = - 372.0 Δ H_{Combustion of propane}^{\circ} = - 530.0 Δ H^{\circ} f o r C_{(graphite)} \to C (g) = + 172.0 Bond energy of H - H bond = + 104.0 Δ H_{f}^{\circ} o f H_{2} O (l) = - 68.0 Δ H_{f}^{\circ} o f C O_{2} (g) = - 94.0$

Discussion

32.	prove that PH3 (phosphine) is basic in nature.
Answer» prove that PH3 (phosphine) is basic in nature.

Discussion

33.	Calcium lactate is a salt of weak acid and represented as Ca(LaC)2. A saturated solution of Ca(LaC)2 contains 0.13 mole of salt in 0.50 litre solution. The pOH of solution is 5. Assuming complete dissociation of salt, calculate Ka of lactic acid.
Answer» Calcium lactate is a salt of weak acid and represented as $C a (L a C)_{2}$ . A saturated solution of $C a (L a C)_{2}$ contains 0.13 mole of salt in 0.50 litre solution. The $p O H$ of solution is 5. Assuming complete dissociation of salt, calculate $K_{a}$ of lactic acid.

Discussion

34.	The correct statement(s) concerning the structures E, F and G is/are:
Answer» The correct statement(s) concerning the structures $E, F$ and $G$ is/are:

Discussion

35.	89.Do fullerenes always conduct electricity
Answer» 89.Do fullerenes always conduct electricity

Discussion

36.	What will be the dimensions of force per unit volume and energy per unit volume
Answer» What will be the dimensions of force per unit volume and energy per unit volume

Discussion

37.	Which of the following is correct order of stability?
Answer» Which of the following is correct order of stability?

Discussion

38.	The position of hydrogen in the periodic table is still not satisfactory.Explain
Answer» The position of hydrogen in the periodic table is still not satisfactory.Explain

Discussion

39.	40. Why but-2-ene is less stable than 2-methylprop-1-ene?
Answer» 40. Why but-2-ene is less stable than 2-methylprop-1-ene?

Discussion

40.	44.The value of equilibrium constant for which the equilibrium mixture contains an appreciable concentration of both reactants and products 1) 3.6×10—7 2) 4.2× 10-19 3)1.8 4)3.3×107
Answer» 44.The value of equilibrium constant for which the equilibrium mixture contains an appreciable concentration of both reactants and products 1) 3.6×10—7 2) 4.2× 10-19 3)1.8 4)3.3×107

Discussion

41.	number of moles of ferrous sulphate oxidised by 1 mole of potassium permanganate in acidic medium is
Answer» number of moles of ferrous sulphate oxidised by 1 mole of potassium permanganate in acidic medium is

Discussion

42.	How to balance reactions using ion-electron method?
Answer» How to balance reactions using ion-electron method?

Discussion

43.	The adiabatic compression ratio in a carnot reversible cycle is 9 when temperature of the source is 227∘C. The temperature of the sink is (given γ=1.5)
Answer» The adiabatic compression ratio in a carnot reversible cycle is $9$ when temperature of the source is $227^{\circ} C .$ The temperature of the sink is (given $γ = 1.5)$

Discussion

44.	The correct order of reactivity towards electrophillic aromatic substitution reaction for the given compounds is:
Answer» The correct order of reactivity towards electrophillic aromatic substitution reaction for the given compounds is:

Discussion

45.	66.10 grams of ice at -20 deg c is added to 10 grams of water at 50 deg c. The amount of ice and water that are present at eualibrium respectively?
Answer» 66.10 grams of ice at -20 deg c is added to 10 grams of water at 50 deg c. The amount of ice and water that are present at eualibrium respectively?

Discussion

46.	Standard heat of formation of KI is −78.31 kcal mol−1. Calculate the lattice energy from following information:I1(K)=4.3 eVE1(I)=73.4 kcal mol−1Bond dissociation energy of I2=36.1 kcal mol−1Sublimation energy of K=21.51 kcal mol−1
Answer» Standard heat of formation of $K I$ is $- 78.31 {kcal mol}^{- 1}$ . Calculate the lattice energy from following information: $I_{1} (K) = 4.3 eV E_{1} (I) = 73.4 {kcal mol}^{- 1} Bond dissociation energy of I_{2} = 36.1 {kcal mol}^{- 1} Sublimation energy of K = 21.51 {kcal mol}^{- 1}$

Discussion

47.	which among the three isotooes of hydrogen is 1) most common 2) most abundant
Answer» which among the three isotooes of hydrogen is 1) most common 2) most abundant

Discussion

48.	Which of these has zero net dipole moment?
Answer» Which of these has zero net dipole moment?

Discussion

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

Discussion

50.	What are the three type of chemical bond?
Answer» What are the three type of chemical bond?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

65. Find the molality of 90% by volume H2SO4 (specific gravity of H2SO4 solution =1.98 g/ml)

Which of the following is a primary amine[AMU 1988]

The composition of 'Golden spangles' is:

The orbital angular momentum of 3P electron is

how many cyclic Isomerism are present in C3H6O

In the chemical reaction} K2Cr2O7+aH2SO4+bSO2 gives K2SO4+Cr2(SO4)3+cH2O a, b and c are

Predict condition under which Al might be expected to reduce MgO.

X mL of H2 gas effuses through a hole in a container in 5 sec. The time taken for the effusion of the same volume of the gas specified below under identical conditions is:

I am not able to solve the problems regarding nernst equations.

The organic chloro compound, which shows complete stereochemical inversion during a SN2 reaction, is

The molal elevation constant of water is 0.51. The boiling point of O.1 molal aqueous NaCl solution isnearly :(1) 100.05 ℃ (2)100.1 ℃(3) 100.2^° C(4) 101.0^° C

33. Compare reactivity of acid chloride and ketone with grignard reagent

Find the major product in the following reaction. CH3−O||CHZn−Hg−−−−−−→Conc. HCl

What is the valency of oxygen in the CO2 molecule?

CH3CH2OH react with CH3MgBr product is....... Please please show the reaction mechanism....

The molar specific heat at constant volume of an ideal gas is equal to 2.5 times the universal gas constant (8.314 J/mol-K). When the temperature increases by 100 K, the change in molar specific enthalpy is J/mol.2909.9

ntEqual moles of benzene and toluene are mixed , the vapour pressure of benzene and toluene in pure state are 700 mm and 600 mm Hg . The mole fraction of benzene in vapour state is?n

34. What is ionization enthalpy?

Structures of glycine and alanine are given below. Show the peptide linkage in glycylalanine. H2N−CH2−COOH ; H2N−(Glycince)CH|CH3(Alanine)-COOH

14. when mixture of 2 alkyl halide reacts with sodium metal in dry ether, mixture of 2 methyl propane , Ethane and 2,3-dimethyl butane was obtained the alkyl halides are

15.why Fe[(NH3)6] +2 does not have d 2sp 3 hybridization and have sp 3d 2 hybridization

When light of 500nm wavelength falls on the surface of a metal, electrons are ejacted with velocity 6×10^4 m/s. Calculate the work function of the metal.

Which of the following is not a nucleophile?

Let p, q ,r s represent the following propositions ,p:xϵ{8, 9, 10, 11, 12}q : x is a composite numberr: x is a perfect squares: x is a prime numberThe integer x ≥ 2 with satisfies ⇁((p⇒q)∧(⇁r∨⇁s)) is11

What is the difference between basic strength and basicity of a base??

What is equivalent mass

The number of tetrahedral voids in a FCC lattice is

Which of the following is a bacteriostatic?

Which of the following compounds is polar covalent compound?

State the merits of Mendeleev's classification of elements.

prove that PH3 (phosphine) is basic in nature.

Calcium lactate is a salt of weak acid and represented as Ca(LaC)2. A saturated solution of Ca(LaC)2 contains 0.13 mole of salt in 0.50 litre solution. The pOH of solution is 5. Assuming complete dissociation of salt, calculate Ka of lactic acid.

The correct statement(s) concerning the structures E, F and G is/are:

89.Do fullerenes always conduct electricity

What will be the dimensions of force per unit volume and energy per unit volume

Which of the following is correct order of stability?

The position of hydrogen in the periodic table is still not satisfactory.Explain

40. Why but-2-ene is less stable than 2-methylprop-1-ene?

44.The value of equilibrium constant for which the equilibrium mixture contains an appreciable concentration of both reactants and products 1) 3.6×10—7 2) 4.2× 10-19 3)1.8 4)3.3×107

number of moles of ferrous sulphate oxidised by 1 mole of potassium permanganate in acidic medium is

How to balance reactions using ion-electron method?

The adiabatic compression ratio in a carnot reversible cycle is 9 when temperature of the source is 227∘C. The temperature of the sink is (given γ=1.5)

The correct order of reactivity towards electrophillic aromatic substitution reaction for the given compounds is:

66.10 grams of ice at -20 deg c is added to 10 grams of water at 50 deg c. The amount of ice and water that are present at eualibrium respectively?

Standard heat of formation of KI is −78.31 kcal mol−1. Calculate the lattice energy from following information:I1(K)=4.3 eVE1(I)=73.4 kcal mol−1Bond dissociation energy of I2=36.1 kcal mol−1Sublimation energy of K=21.51 kcal mol−1

which among the three isotooes of hydrogen is 1) most common 2) most abundant

Which of these has zero net dipole moment?

Which of the following has the lowest pKa value?

What are the three type of chemical bond?