2600 + Interview Questions in Chemistry Page 40 InterviewSolution

1951.	Caprolactam is used for the manufacture of
Answer» Caprolactam is used for the manufacture of

Discussion

1952.	Which of the following graphs between wave function and radius of nucleus correspond to one node?
Answer» Which of the following graphs between wave function and radius of nucleus correspond to one node?

Discussion

1953.	What is the change in hybridization of oxygen atom associated with carbon in the zone of reduction?
Answer» What is the change in hybridization of oxygen atom associated with carbon in the zone of reduction?

Discussion

1954.	A gas is cooled and loses 65 J of heat. The gas contracts as it cools and the work done on the system is equal to 20 J. What is △U?
Answer» A gas is cooled and loses $65 J$ of heat. The gas contracts as it cools and the work done on the system is equal to $20 J$ . What is $△ U$ ?

Discussion

1955.	Saccharin, an artificial sweetener, is manufactured from:
Answer» Saccharin, an artificial sweetener, is manufactured from:

Discussion

1956.	3M solution of Na2CO3 is boiled in a closed container with excess of CaF2. Very little amount of CaCO3 and NaF are formed. If the solubility product Ksp of CaCO3 is y and molar solubility of CaF2 in water is x, find the molar concentration of F− in resulting solution after equilibrium is attained.
Answer» $3 M$ solution of $N a_{2} C O_{3}$ is boiled in a closed container with excess of $C a F_{2} .$ Very little amount of $C a C O_{3}$ and $N a F$ are formed. If the solubility product $K_{s p}$ of $C a C O_{3}$ is y and molar solubility of $C a F_{2}$ in water is x, find the molar concentration of $F^{-}$ in resulting solution after equilibrium is attained.

Discussion

1957.	CH3−CH3\|CH−CH2−CH=CH−CH3
Answer» $C H_{3} - C H_{3} \| C H - C H_{2} - C H = C H - C H_{3}$

Discussion

1958.	Bond dissociation enthalpies of H2(g) and N2(g) are 436.0 kJmol−1 and 941.3 kJmol−1 respectively. Enthalpy of formation of NH3(g) is −46.0 kJmol−1. What is the enthalpy of atomization ofNH3.
Answer» Bond dissociation enthalpies of $H_{2} (g) a n d N_{2} (g)$ are $436.0 k J m o l^{- 1}$ and $941.3 k J m o l^{- 1}$ respectively. Enthalpy of formation of $N H_{3}$ (g) is $- 46.0 k J m o l^{- 1}$ . What is the enthalpy of atomization of $N H_{3}$ .

Discussion

1959.	The reagent employed to distinguish between phenol and salicylic acid is
Answer» The reagent employed to distinguish between phenol and salicylic acid is

Discussion

1960.	0.1 mol of CH3NH2 (Kb=6×10−4) is added to 0.08 mol of HCl and the solution is diluted to 1 L. The hydrogen ion concentration in the solution is:
Answer» 0.1 mol of $C H_{3} N H_{2} (K_{b} = 6 \times 10^{- 4})$ is added to 0.08 mol of $H C l$ and the solution is diluted to $1 L$ . The hydrogen ion concentration in the solution is:

Discussion

1961.	AlF3 is soluble in HF only in presence of KF. It is due to the formation of
Answer» $A l F_{3}$ is soluble in HF only in presence of KF. It is due to the formation of

Discussion

1962.	When 10 g of KHCO3 is heated, 6.31 g of K2CO3 and 1.07 g of H2O are produced. How many grams of CO2 will be produced?
Answer» When $10 g$ of $K H C O_{3}$ is heated, $6.31 g$ of $K_{2} C O_{3}$ and $1.07 g$ of $H_{2} O$ are produced. How many grams of $C O_{2}$ will be produced?

Discussion

1963.	pH of a solution produced when an aqueous solution of pH=6 is mixed with an equal volume of an aqueous solution of pH=3 is:(Given:log5.005=0.6994)
Answer» $p H$ of a solution produced when an aqueous solution of $p H = 6$ is mixed with an equal volume of an aqueous solution of $p H = 3$ is: $(Given : log 5.005 = 0.6994)$

Discussion

1964.	Which reacts rapidly with Lucas reagent ?
Answer» Which reacts rapidly with Lucas reagent ?

Discussion

1965.	Among the dimethylcyclohexanes, which one can be obtained in an enantiopure form?
Answer» Among the dimethylcyclohexanes, which one can be obtained in an enantiopure form?

Discussion

1966.	The second ionization potential of an element M is the energy required to
Answer» The second ionization potential of an element M is the energy required to

1966.

The second ionization potential of an element M is the energy required to

Answer»

The second ionization potential of an element M is the energy required to

Discussion

1967.	What will be the sum of pH and pOH in an aqueous solution?
Answer» What will be the sum of pH and pOH in an aqueous solution?

1967.

What will be the sum of pH and pOH in an aqueous solution?

Answer»

What will be the sum of pH and pOH in an aqueous solution?

Discussion

1968.	Oxygen molecule is paramagnetic because
Answer» Oxygen molecule is paramagnetic because

Discussion

1969.	Among the following gases which one has the lowest root mean square velocity at 25∘ C
Answer» Among the following gases which one has the lowest root mean square velocity at 25 $^{\circ}$ C

1969.

Among the following gases which one has the lowest root mean square velocity at 25∘ C

Answer»

Among the following gases which one has the lowest root mean square velocity at 25 $^{\circ}$ C

Discussion

1970.	The correct statement in the following is[MPPET 1997]
Answer» The correct statement in the following is [MP PET 1997]

1970.

The correct statement in the following is[MPPET 1997]

Answer»

The correct statement in the following is

[MP
PET 1997]

Discussion

1971.	Hanny - Smith formula for calculating the percentage of ionic character is
Answer» Hanny - Smith formula for calculating the percentage of ionic character is

Discussion

1972.	The sodium salt of methyl orange has 7% sodium. What is the minimum molecular weight of the compound?
Answer» The sodium salt of methyl orange has 7% sodium. What is the minimum molecular weight of the compound?

Discussion

1973.	The mass of an electron is 9.1×10−31 kg. If the K.E. is given as 3.0×10−25 J. Calculate the wavelength of the electron.
Answer» The mass of an electron is $9.1 \times 10^{- 31} k g$ . If the K.E. is given as $3.0 \times 10^{- 25} J$ . Calculate the wavelength of the electron.

Discussion

1974.	Among the following, the strongest nucleophile is
Answer» Among the following, the strongest nucleophile is

Discussion

1975.	The atomic weight of two elements A and B are 40 and 80 respectively. If x g of A contains y atoms,how many atoms are present in 2x g of B?
Answer» The atomic weight of two elements A and B are 40 and 80 respectively. If $x g$ of A contains y atoms,how many atoms are present in $2 x g$ of B?

Discussion

1976.	If the temperature of 1 mole of an ideal gas is increased by 50∘ C, calculate the change in the kinetic energy of the system.
Answer» If the temperature of 1 mole of an ideal gas is increased by $50^{\circ} C$ , calculate the change in the kinetic energy of the system.

Discussion

1977.	Which of the following is the most stable ion?
Answer» Which of the following is the most stable ion?

Discussion

1978.	If pKb for the fluoride ion at 25∘C is 10.83The ionization constant of hydrofluoric acid in water at this temperature will be:(Given:10−10.83=1.48×10−11)
Answer» If $p K_{b}$ for the fluoride ion at $25^{\circ} C$ is 10.83 The ionization constant of hydrofluoric acid in water at this temperature will be: $(G i v e n : 10^{- 10.83} = 1.48 \times 10^{- 11})$

Discussion

1979.	A gas has a vapour density of 11.2. The volume occupied by 1 g of the gas at STP is:
Answer» A gas has a vapour density of $11.2$ . The volume occupied by $1 g$ of the gas at STP is:

Discussion

1980.	The halide most abundant in seawater is:
Answer» The halide most abundant in seawater is:

Discussion

1981.	ClCH2CHCl2alc. KOH−−−−−→AA is:
Answer» $C l C H_{2} C H C l_{2} alc. KOH - ---- \to A$ A is:

Discussion

1982.	Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound.Which of the following possess the least covalent character?
Answer» Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound. Which of the following possess the least covalent character?

Discussion

1983.	Molecular formula of Glauber’s salt is
Answer» Molecular formula of Glauber’s salt is

Discussion

1984.	The volume of oxygen liberated at STP from 15 mL of 20 volume H2O2 is:
Answer» The volume of oxygen liberated at STP from $15 mL$ of $20$ volume $H_{2} O_{2}$ is:

Discussion

1985.	Which of the following compounds does not have molecular plane as nodal plane for its π - electron cloud?
Answer» Which of the following compounds does not have molecular plane as nodal plane for its $π$ - electron cloud?

Discussion

1986.	The decomposition of dimethyl ether leads to the formation of CH4,H2 and CO and the reaction rate is givenBy rate = K[CH3OCH3]32The rate of reaction is followed by increase in pressure in a closed vessel and the rate can be expressed in terms of the partial pressure of dimethyl ether i.e, Rate = K(pCH3OCH3)32If pressure is measured in bar and time in minutes, the units of rate constant are
Answer» The decomposition of dimethyl ether leads to the formation of $C H_{4}, H_{2}$ and CO and the reaction rate is given By rate = $K [C H_{3} O C H_{3}]^{\frac{3}{2}}$ The rate of reaction is followed by increase in pressure in a closed vessel and the rate can be expressed in terms of the partial pressure of dimethyl ether i.e, Rate = $K (p_{C} H_{3} O C H_{3})^{\frac{3}{2}}$ If pressure is measured in bar and time in minutes, the units of rate constant are

Discussion

1987.	If the solubility of calcium sulphate in water is 1.03 × 10−5, what will be its solubility in 0.005 M solution of sulphuric acid?
Answer» If the solubility of calcium sulphate in water is $1.03 \times 10^{- 5}$ , what will be its solubility in $0.005 M$ solution of sulphuric acid?

Discussion

1988.	Which equation do not represent enthalpy change of reaction which correspond to the standard enthalpy change of atomisation of chlorine?
Answer» Which equation do not represent enthalpy change of reaction which correspond to the standard enthalpy change of atomisation of chlorine?

Discussion

1989.	Which of the following contains the maximum number of atoms at STP?
Answer» Which of the following contains the maximum number of atoms at STP?

Discussion

1990.	The value of the energy for the first excited state of hydrogen atom will be
Answer» The value of the energy for the first excited state of hydrogen atom will be

Discussion

1991.	Complete combustion of benzene produces:
Answer» Complete combustion of benzene produces:

Discussion

1992.	Alkyl halides can be converted into Grignard reagents by [KCET 1989]
Answer» Alkyl halides can be converted into Grignard reagents by [KCET 1989]

1992.

Alkyl halides can be converted into Grignard reagents by [KCET 1989]

Answer»

Alkyl halides can be converted into Grignard reagents by

[KCET 1989]

Discussion

1993.	The molecules having the same hybridization and number of lone pairs of electrons is:
Answer» The molecules having the same hybridization and number of lone pairs of electrons is:

Discussion

1994.	What would be the hydrogen ion concentration in a solution containing 0.04 mole of acetic acid and 0.05 mole of sodium acetate in 500 ml of the solution?Dissociation constant for acetic acid is 1.8 x 10−5.The [ H+] is:
Answer» What would be the hydrogen ion concentration in a solution containing 0.04 mole of acetic acid and 0.05 mole of sodium acetate in 500 ml of the solution? Dissociation constant for acetic acid is 1.8 x $10^{- 5}$ . The [ $H^{+}$ ] is:

1994.

What would be the hydrogen ion concentration in a solution containing 0.04 mole of acetic acid and 0.05 mole of sodium acetate in 500 ml of the solution?Dissociation constant for acetic acid is 1.8 x 10−5.The [ H+] is:

Answer»

What would be the hydrogen ion concentration in a solution containing 0.04 mole of acetic acid and 0.05 mole of sodium acetate in 500 ml of the solution?

Dissociation constant for acetic acid is 1.8 x $10^{- 5}$ .

The [ $H^{+}$ ] is:

Discussion

1995.	What is `A' in the following reaction 2Fe3+(aq)+Sn2+(aq)→2Fe2+(aq)+A
Answer» What is `A' in the following reaction $2 F e^{3 +} (a q) + S n^{2 +} (a q) \to 2 F e^{2 +} (a q) + A$

Discussion

1996.	The equilibrium constant at 25∘ C for the reaction Fe2++Ag+⇌Fe3++Ag is:Given E0Ag+/Ag=0.7998 V and E0Fe3+/Fe2+=0.771 V, log 2 =0.30, log 3 = 0.48, 2.303RTF=0.06
Answer» The equilibrium constant at $25^{\circ} C$ for the reaction $F e^{2 +} + A g^{+} ⇌ F e^{3 +} + A g$ is: Given $E_{A g^{+} / A g}^{0} = 0.7998 V a n d E_{F e^{3 +} / F e^{2 +}}^{0} = 0.771 V$ , log 2 =0.30, log 3 = 0.48, $\frac{2.303 R T}{F} = 0.06$

Discussion

1997.	Benzene diazonium chloride on boiling with dilute sulphuric acid gives [MP PMT 1983]
Answer» Benzene diazonium chloride on boiling with dilute sulphuric acid gives [MP PMT 1983]

Discussion

1998.	Phenol is used in the manufacture of [AIIMS 1996]
Answer» Phenol is used in the manufacture of [AIIMS 1996]

Discussion

1999.	Two closed vessel A and B of equal volume containing air at pressure P1 and temperature T1 are connected to each other through a narrow open tube. If the temperature of one is now maintained at T1 and other at T2 (where T1>T2) then that what will be the final pressure?
Answer» Two closed vessel $A$ and $B$ of equal volume containing air at pressure $P_{1}$ and temperature $T_{1}$ are connected to each other through a narrow open tube. If the temperature of one is now maintained at $T_{1}$ and other at $T_{2}$ (where $T_{1} > T_{2}$ ) then that what will be the final pressure?

Discussion

2000.	The solubility product of a sparingly soluble salt AX2 is 3.2×10−11. The value s3 (in molL−1) is: where s = solubility
Answer» The solubility product of a sparingly soluble salt $A X_{2}$ is $3.2 \times 10^{- 11} .$ The value $s^{3}$ $(i n m o l L^{- 1})$ is: where s = solubility

Discussion

Explore topic-wise InterviewSolutions in .

Caprolactam is used for the manufacture of

Which of the following graphs between wave function and radius of nucleus correspond to one node?

What is the change in hybridization of oxygen atom associated with carbon in the zone of reduction?

A gas is cooled and loses 65 J of heat. The gas contracts as it cools and the work done on the system is equal to 20 J. What is △U?

Saccharin, an artificial sweetener, is manufactured from:

CH3−CH3|CH−CH2−CH=CH−CH3

Bond dissociation enthalpies of H2(g) and N2(g) are 436.0 kJmol−1 and 941.3 kJmol−1 respectively. Enthalpy of formation of NH3(g) is −46.0 kJmol−1. What is the enthalpy of atomization ofNH3.

The reagent employed to distinguish between phenol and salicylic acid is

0.1 mol of CH3NH2 (Kb=6×10−4) is added to 0.08 mol of HCl and the solution is diluted to 1 L. The hydrogen ion concentration in the solution is:

AlF3 is soluble in HF only in presence of KF. It is due to the formation of

When 10 g of KHCO3 is heated, 6.31 g of K2CO3 and 1.07 g of H2O are produced. How many grams of CO2 will be produced?

pH of a solution produced when an aqueous solution of pH=6 is mixed with an equal volume of an aqueous solution of pH=3 is:(Given:log5.005=0.6994)

Which reacts rapidly with Lucas reagent ?

Among the dimethylcyclohexanes, which one can be obtained in an enantiopure form?

The second ionization potential of an element M is the energy required to

What will be the sum of pH and pOH​ in an aqueous solution?

Oxygen molecule is paramagnetic because

Among the following gases which one has the lowest root mean square velocity at 25∘ C

The correct statement in the following is[MPPET 1997]

Hanny - Smith formula for calculating the percentage of ionic character is

The sodium salt of methyl orange has 7% sodium. What is the minimum molecular weight of the compound?

The mass of an electron is 9.1×10−31 kg. If the K.E. is given as 3.0×10−25 J. Calculate the wavelength of the electron.

Among the following, the strongest nucleophile is

The atomic weight of two elements A and B are 40 and 80 respectively. If x g of A contains y atoms,how many atoms are present in 2x g of B?

If the temperature of 1 mole of an ideal gas is increased by 50∘ C, calculate the change in the kinetic energy of the system.

Which of the following is the most stable ion?

If pKb for the fluoride ion at 25∘C is 10.83The ionization constant of hydrofluoric acid in water at this temperature will be:(Given:10−10.83=1.48×10−11)

A gas has a vapour density of 11.2. The volume occupied by 1 g of the gas at STP is:

The halide most abundant in seawater is:

ClCH2CHCl2alc. KOH−−−−−→AA is:

Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound.Which of the following possess the least covalent character?

Molecular formula of Glauber’s salt is

The volume of oxygen liberated at STP from 15 mL of 20 volume H2O2 is:

Which of the following compounds does not have molecular plane as nodal plane for its π - electron cloud?

If the solubility of calcium sulphate in water is 1.03 × 10−5, what will be its solubility in 0.005 M solution of sulphuric acid?

Which equation do not represent enthalpy change of reaction which correspond to the standard enthalpy change of atomisation of chlorine?

Which of the following contains the maximum number of atoms at STP?

The value of the energy for the first excited state of hydrogen atom will be

Complete combustion of benzene produces:

Alkyl halides can be converted into Grignard reagents by [KCET 1989]

The molecules having the same hybridization and number of lone pairs of electrons is:

What would be the hydrogen ion concentration in a solution containing 0.04 mole of acetic acid and 0.05 mole of sodium acetate in 500 ml of the solution?Dissociation constant for acetic acid is 1.8 x 10−5.The [ H+] is:

What is `A' in the following reaction 2Fe3+(aq)+Sn2+(aq)→2Fe2+(aq)+A

The equilibrium constant at 25∘ C for the reaction Fe2++Ag+⇌Fe3++Ag is:Given E0Ag+/Ag=0.7998 V and E0Fe3+/Fe2+=0.771 V, log 2 =0.30, log 3 = 0.48, 2.303RTF=0.06

Benzene diazonium chloride on boiling with dilute sulphuric acid gives [MP PMT 1983]

Phenol is used in the manufacture of [AIIMS 1996]

Two closed vessel A and B of equal volume containing air at pressure P1 and temperature T1 are connected to each other through a narrow open tube. If the temperature of one is now maintained at T1 and other at T2 (where T1&gt;T2) then that what will be the final pressure?

The solubility product of a sparingly soluble salt AX2 is 3.2×10−11. The value s3 (in molL−1) is: where s = solubility

What will be the sum of pH and pOH in an aqueous solution?

Two closed vessel A and B of equal volume containing air at pressure P1 and temperature T1 are connected to each other through a narrow open tube. If the temperature of one is now maintained at T1 and other at T2 (where T1>T2) then that what will be the final pressure?