46295 + Interview Questions in Chemistry Page 26 InterviewSolution

1251.	With the help of an example explain how do tranquilizers control the feeling of depression?
Answer» With the help of an example explain how do tranquilizers control the feeling of depression?

Discussion

1252.	Which of the following is not a consequence of lanthanide contraction ?
Answer» Which of the following is not a consequence of lanthanide contraction ?

Discussion

1253.	14. which of the following alkyl halides will undergo SN1 reaction most readily? (1)(CH3)3------F (2)(CH3)3------Cl (3)(CH3)3------Br (4)(CH3)3------I
Answer» 14. which of the following alkyl halides will undergo SN1 reaction most readily? (1)(CH3)3------F (2)(CH3)3------Cl (3)(CH3)3------Br (4)(CH3)3------I

Discussion

1254.	Obtain a sample of rainwater. Add to it a few drops of universal indicator. Measure its pH. Describe the nature of the sample of rainwater and explain the effect if it has on the living world.
Answer» Obtain a sample of rainwater. Add to it a few drops of universal indicator. Measure its pH. Describe the nature of the sample of rainwater and explain the effect if it has on the living world.

Discussion

1255.	31. More acidic than ethanol is { (1) CH_3CH_2CH_2CH_2CH_2CH_2CH_2CH_3{ (2) CH_3CO_2CH_2CH_3{ (3) CH_3COCH_2COCH_3{ (4) CH_3COCH_3
Answer» 31. More acidic than ethanol is { (1) CH_3CH_2CH_2CH_2CH_2CH_2CH_2CH_3{ (2) CH_3CO_2CH_2CH_3{ (3) CH_3COCH_2COCH_3{ (4) CH_3COCH_3

Discussion

1256.	calculate the speed of electron in the second orbit of hydrogen atom given the speed of light is 3*10^8
Answer» calculate the speed of electron in the second orbit of hydrogen atom given the speed of light is 3*10^8

Discussion

1257.	Which of the following isoelectronic ions have lowest ionization?
Answer» Which of the following isoelectronic ions have lowest ionization?

Discussion

1258.	17. The molar heat capacity at constant pressure of an8Rideal gas mixture is3The ratio of molar heatcapacities at constant pressure to constant volumefor this mixture will be(1) 1.5(2) 1.4(3) 1.6(4) 1.2
Answer» 17. The molar heat capacity at constant pressure of an8Rideal gas mixture is3The ratio of molar heatcapacities at constant pressure to constant volumefor this mixture will be(1) 1.5(2) 1.4(3) 1.6(4) 1.2

Discussion

1259.	Clemmenson reduction of ketone is carried out in the presence of :
Answer» Clemmenson reduction of ketone is carried out in the presence of :

Discussion

1260.	39. Consider the following reaction in closed container. 4NH3 + 5O2 --------> 4NO + 6H2O If initially 68 g is ammonia and 192 g oxygen is present, calculate the approximate mass % NO (g) formed at 80 % completion of reaction. (1) 28% (2) 45% (3) 25% (4) 37%
Answer» 39. Consider the following reaction in closed container. 4NH3 + 5O2 --------> 4NO + 6H2O If initially 68 g is ammonia and 192 g oxygen is present, calculate the approximate mass % NO (g) formed at 80 % completion of reaction. (1) 28% (2) 45% (3) 25% (4) 37%

Discussion

1261.	A gas (Cv,m=52R) behaving ideally was allowed to expand reversibly and adiabatically from 1 litre to 32 litre. Its initial temperature was 227oC. The molar enthalpy change (in J/mol) for the process is −x×R. Find the value of x
Answer» A gas $(C_{v, m} = \frac{5}{2} R)$ behaving ideally was allowed to expand reversibly and adiabatically from 1 litre to 32 litre. Its initial temperature was $227^{o} C .$ The molar enthalpy change (in $J / m o l$ ) for the process is $- x \times R$ . Find the value of $x$

Discussion

1262.	The number of π and σ bonds present in H2C=CHCH=CHCH2 are:
Answer» The number of π and σ bonds present in H₂C=CHCH=CHCH₂ are:

Discussion

1263.	the escape velocity of a spherical planet is vo what is the escape veocity corresponding to another planet of twice the radius and half the mean density. 1) (\sqrt{2)} vo 2) vo/\sqrt2 3) 2vo 4) 4v
Answer» the escape velocity of a spherical planet is vo what is the escape veocity corresponding to another planet of twice the radius and half the mean density. 1) (\sqrt{2)} vo 2) vo/\sqrt2 3) 2vo 4) 4v

Discussion

1264.	In the aromatic substitution reaction of C6H5Y, the major product (> 60%) is m-isomer, so the group Y is
Answer» In the aromatic substitution reaction of $C_{6} H_{5} Y,$ the major product (> 60%) is m-isomer, so the group Y is

Discussion

1265.	Which of the following statements are true about metals ? (a) Valence band overlaps with conduction band (b) The gap between valence band and conduction band is negligible (c) The gap between valence band and conduction band connot be determined (d) Valence band may remain partially filled
Answer» Which of the following statements are true about metals ? (a) Valence band overlaps with conduction band (b) The gap between valence band and conduction band is negligible (c) The gap between valence band and conduction band connot be determined (d) Valence band may remain partially filled

1265.

Which of the following statements are true about metals ? (a) Valence band overlaps with conduction band (b) The gap between valence band and conduction band is negligible (c) The gap between valence band and conduction band connot be determined (d) Valence band may remain partially filled

Answer»

Which of the following statements are true about metals ?

(a) Valence band overlaps with conduction band

(b) The gap between valence band and conduction band is negligible

(c) The gap between valence band and conduction band connot be determined

(d) Valence band may remain partially filled

Discussion

1266.	Arrange the following in order of increasing mass (i) 3.0115×1023 molecules of white phosphorus (P4)(ii) 10 moles of H2 gas (iii) 1 g molecule of anhydrous Na2CO3(iv) 33.6 L of CO2 gas at S.T.P
Answer» Arrange the following in order of increasing mass (i) $3.0115 \times 10^{23}$ molecules of white phosphorus $(P_{4})$ (ii) $10$ moles of $H_{2}$ gas (iii) $1 g$ molecule of anhydrous $N a_{2} C O_{3}$ (iv) $33.6 L$ of $C O_{2}$ gas at S.T.P

Discussion

1267.	what is heat and carnot engine?
Answer» what is heat and carnot engine?

Discussion

1268.	The orbital angular momentum of a 4d electron will be:
Answer» The orbital angular momentum of a 4d electron will be:

Discussion

1269.	Write the conjugate acids for the following Brönsted bases: NH2–, NH3 and HCOO–.
Answer» Write the conjugate acids for the following Brönsted bases: NH₂^–, NH₃ and HCOO^–.

Discussion

1270.	Consider a compound “A” which dissolved in water in equimolar ratio and formed a solution of average molar mass of 200 g/mol. If the same compound “A” forms a 19.1 %(w/v) solution with another solvent 'X' then the molarity of solution 'A' with 'X' would be equal to:
Answer» Consider a compound “A” which dissolved in water in equimolar ratio and formed a solution of average molar mass of $200 g / m o l$ . If the same compound “A” forms a $19.1 % (w / v)$ solution with another solvent 'X' then the molarity of solution 'A' with 'X' would be equal to:

Discussion

1271.	The first member of each group of representative elements (i.e., s and p - block elements) shows anomalous behaviour. Illustrate with two examples.
Answer» The first member of each group of representative elements (i.e., s and p - block elements) shows anomalous behaviour. Illustrate with two examples.

Discussion

1272.	Which of the following exhibits the highest boiling point?
Answer» Which of the following exhibits the highest boiling point?

Discussion

1273.	in CO+ THE highest occupied molecular orbital is: a)σ2pz c)π2px b)σ\ast2pz d)π\ast2p
Answer» in CO+ THE highest occupied molecular orbital is: a)σ2pz c)π2px b)σ\ast2pz d)π\ast2p

Discussion

1274.	sp and sv are specific heats at constant pressure and constant volume, respectively. It is observed that sp−sv=a for hydrogen gas, sp−sv=b for nitrogen gas. The correct relation between a and b is
Answer» $s_{p}$ and $s_{v}$ are specific heats at constant pressure and constant volume, respectively. It is observed that $s_{p} - s_{v} = a$ for hydrogen gas, $s_{p} - s_{v} = b$ for nitrogen gas. The correct relation between $a$ and $b$ is

Discussion

1275.	Indicatethe σ andπ bondsin the following molecules:C6H6,C6H12,CH2Cl2,CH2 =C = CH2,CH3NO2,HCONHCH3
Answer» Indicate the σ and π bonds in the following molecules: C₆H₆, C₆H₁₂, CH₂Cl₂, CH₂= C = CH₂, CH₃NO₂, HCONHCH₃

1275.

Indicatethe σ andπ bondsin the following molecules:C6H6,C6H12,CH2Cl2,CH2 =C = CH2,CH3NO2,HCONHCH3

Answer»

Indicate
the σ and
π bonds
in the following molecules:

C₆H₆,
C₆H₁₂,
CH₂Cl₂,
CH₂=
C = CH₂,
CH₃NO₂,
HCONHCH₃

Discussion

1276.	What will be strength of N/8 KOH solution in g per litre
Answer» What will be strength of N/8 KOH solution in g per litre

Discussion

1277.	An electron with charge -e and mass m travels at a speed v in a planeperpendicular to a magnetic field of magnitude B. The electron follows acircular path of radius R. In a time, t, the electron travels halfway around thecircle. What is the amount of work done by the magnetic field?
Answer» An electron with charge -e and mass m travels at a speed v in a plane perpendicular to a magnetic field of magnitude B. The electron follows a circular path of radius R. In a time, t, the electron travels halfway around the circle. What is the amount of work done by the magnetic field?

Discussion

1278.	Which of the following overlapping will result in the formation of strongest bond?
Answer» Which of the following overlapping will result in the formation of strongest bond?

Discussion

1279.	at the equilibrium of the reaction ;N2O4 - 2 NO2the observed molecular weight of N2O4 is 80 g /mol at 350K. The percentage of dissociation of N2O4 at 350 K is ?a.10%b.15%c.20%d.18%
Answer» at the equilibrium of the reaction ; N2O4 - 2 NO2 the observed molecular weight of N2O4 is 80 g /mol at 350K. The percentage of dissociation of N2O4 at 350 K is ? a.10% b.15% c.20% d.18%

Discussion

1280.	How many mole of FeSO4 reacted with one mole of KMnO4 in acidic medium?
Answer» How many mole of FeSO4 reacted with one mole of KMnO4 in acidic medium?

Discussion

1281.	Which of the following is not an isomer of allyl alcohol?
Answer» Which of the following is not an isomer of allyl alcohol?

Discussion

1282.	Which of the following is not a peroxide?
Answer» Which of the following is not a peroxide?

Discussion

1283.	Which pair of oxides of nitrogen is paramagnetic ?
Answer» Which pair of oxides of nitrogen is paramagnetic ?

Discussion

1284.	The correct Schrodinger wave equation for an electron with E as total energy and V as potential energy is
Answer» The correct Schrodinger wave equation for an electron with E as total energy and V as potential energy is

Discussion

1285.	Number of sigma bond in Ethane is options - 2 , 3 ,4 or 5
Answer» Number of sigma bond in Ethane is options - 2 , 3 ,4 or 5

Discussion

1286.	34. Which one has smallest bond angle? 1.H_2O 2. SO_2 3. SH_2 4. NH_3
Answer» 34. Which one has smallest bond angle? 1.H_2O 2. SO_2 3. SH_2 4. NH_3

Discussion

1287.	What are the three main constituents of soap?
Answer» What are the three main constituents of soap?

Discussion

1288.	Which of the following alkali metals is smallest in size
Answer» Which of the following alkali metals is smallest in size

Discussion

1289.	Which of the following have α-Hydrogens ?
Answer» Which of the following have $α$ -Hydrogens ?

Discussion

1290.	During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio C_{p/_{}}C_{v }is: a)3/2 b)2 c)4/3 d)5/
Answer» During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio C_{p/_{}}C_{v }is: a)3/2 b)2 c)4/3 d)5/

Discussion

1291.	How to write the block numbers of a element
Answer» How to write the block numbers of a element

Discussion

1292.	18.If 6 litres of hydrogen and 4 litres of chlorine are mixed and exploded and if water is added to the gases formed,find the volume of the residual gas.
Answer» 18.If 6 litres of hydrogen and 4 litres of chlorine are mixed and exploded and if water is added to the gases formed,find the volume of the residual gas.

Discussion

1293.	and are
Answer» and are

Discussion

1294.	Gaseous Benzene reacts with hydrogen gas in presence of a Nickel catalyst to form gaseous cyclohexane according to the Reaction C6H6+3H2⟶C6H12 A mixture of C6H6 and excess H2 has a pressure of 60mm of Hg in an unknown volume. After the gas had been passed over a Ni catalyst and all the benzene converted to cyclohexane, the pressure of the gas was 30mm of Hg in the same volume at the same temperature. The fraction of C6H6 (by volume) present in the original volume is
Answer» Gaseous Benzene reacts with hydrogen gas in presence of a Nickel catalyst to form gaseous cyclohexane according to the Reaction $C_{6} H_{6} + 3 H_{2} ⟶ C_{6} H_{12}$ A mixture of $C_{6} H_{6}$ and excess $H_{2}$ has a pressure of 60mm of Hg in an unknown volume. After the gas had been passed over a Ni catalyst and all the benzene converted to cyclohexane, the pressure of the gas was 30mm of Hg in the same volume at the same temperature. The fraction of $C_{6} H_{6}$ (by volume) present in the original volume is

Discussion

1295.	How many gram of Caco3 reacts completely with 73 g of Hcl ?
Answer» How many gram of Caco3 reacts completely with 73 g of Hcl ?

Discussion

1296.	Which of the following is used for measuring the mass of costly substances such as gold, silver, diamonds?
Answer» Which of the following is used for measuring the mass of costly substances such as gold, silver, diamonds?

Discussion

1297.	Is this formula always applicable, α x molarity = concentration of ions in solution?(α is degree of dissociation)
Answer» Is this formula always applicable, α x molarity = concentration of ions in solution? (α is degree of dissociation)

Discussion

1298.	Two radioactive materials A and B have decay constants 10 λ and λ, respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of A to that of B will be 1e after a time:
Answer» Two radioactive materials $A$ and $B$ have decay constants $10 λ and λ,$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of $A$ to that of $B$ will be $\frac{1}{e}$ after a time:

Discussion

1299.	Coppercrystallises into a fcc lattice with edge length 3.61 × 10−8cm. Show that the calculated density is in agreement with itsmeasured value of 8.92 g cm−3.
Answer» Copper crystallises into a fcc lattice with edge length 3.61 × 10⁻⁸ cm. Show that the calculated density is in agreement with its measured value of 8.92 g cm⁻³.

Discussion

1300.	Ph−CH=NO2Hisomerises→3 days(x)(50−50%), Isomer (x) is:
Answer» $P h - C H = N O_{2} H i s o m e r i s e s \to 3 d a y s (x) (50 - 50 %)$ , Isomer (x) is:

Discussion

Explore topic-wise InterviewSolutions in .

With the help of an example explain how do tranquilizers control the feeling of depression?

Which of the following is not a consequence of lanthanide contraction ?

14. which of the following alkyl halides will undergo SN1 reaction most readily? (1)(CH3)3------F (2)(CH3)3------Cl (3)(CH3)3------Br (4)(CH3)3------I

Obtain a sample of rainwater. Add to it a few drops of universal indicator. Measure its pH. Describe the nature of the sample of rainwater and explain the effect if it has on the living world.

31. More acidic than ethanol is { (1) CH_3CH_2CH_2CH_2CH_2CH_2CH_2CH_3{ (2) CH_3CO_2CH_2CH_3{ (3) CH_3COCH_2COCH_3{ (4) CH_3COCH_3

calculate the speed of electron in the second orbit of hydrogen atom given the speed of light is 3*10^8

Which of the following isoelectronic ions have lowest ionization?

17. The molar heat capacity at constant pressure of an8Rideal gas mixture is3The ratio of molar heatcapacities at constant pressure to constant volumefor this mixture will be(1) 1.5(2) 1.4(3) 1.6(4) 1.2

Clemmenson reduction of ketone is carried out in the presence of :

39. Consider the following reaction in closed container. 4NH3 + 5O2 --------> 4NO + 6H2O If initially 68 g is ammonia and 192 g oxygen is present, calculate the approximate mass % NO (g) formed at 80 % completion of reaction. (1) 28% (2) 45% (3) 25% (4) 37%

A gas (Cv,m=52R) behaving ideally was allowed to expand reversibly and adiabatically from 1 litre to 32 litre. Its initial temperature was 227oC. The molar enthalpy change (in J/mol) for the process is −x×R. Find the value of x

The number of π and σ bonds present in H2C=CHCH=CHCH2 are:

the escape velocity of a spherical planet is vo what is the escape veocity corresponding to another planet of twice the radius and half the mean density. 1) (\sqrt{2)} vo 2) vo/\sqrt2 3) 2vo 4) 4v

In the aromatic substitution reaction of C6H5Y, the major product (&gt; 60%) is m-isomer, so the group Y is

Which of the following statements are true about metals ? (a) Valence band overlaps with conduction band (b) The gap between valence band and conduction band is negligible (c) The gap between valence band and conduction band connot be determined (d) Valence band may remain partially filled

Arrange the following in order of increasing mass (i) 3.0115×1023 molecules of white phosphorus (P4)(ii) 10 moles of H2 gas (iii) 1 g molecule of anhydrous Na2CO3(iv) 33.6 L of CO2 gas at S.T.P

what is heat and carnot engine?

The orbital angular momentum of a 4d electron will be:

Write the conjugate acids for the following Brönsted bases: NH2–, NH3 and HCOO–.

Consider a compound “A” which dissolved in water in equimolar ratio and formed a solution of average molar mass of 200 g/mol. If the same compound “A” forms a 19.1 %(w/v) solution with another solvent 'X' then the molarity of solution 'A' with 'X' would be equal to:

The first member of each group of representative elements (i.e., s and p - block elements) shows anomalous behaviour. Illustrate with two examples.

Which of the following exhibits the highest boiling point?

in CO+ THE highest occupied molecular orbital is: a)σ2pz c)π2px b)σ\ast2pz d)π\ast2p

sp and sv are specific heats at constant pressure and constant volume, respectively. It is observed that sp−sv=a for hydrogen gas, sp−sv=b for nitrogen gas. The correct relation between a and b is

Indicatethe σ andπ bondsin the following molecules:C6H6,C6H12,CH2Cl2,CH2 =C = CH2,CH3NO2,HCONHCH3

What will be strength of N/8 KOH solution in g per litre

An electron with charge -e and mass m travels at a speed v in a planeperpendicular to a magnetic field of magnitude B. The electron follows acircular path of radius R. In a time, t, the electron travels halfway around thecircle. What is the amount of work done by the magnetic field?

Which of the following overlapping will result in the formation of strongest bond?

at the equilibrium of the reaction ;N2O4 - 2 NO2the observed molecular weight of N2O4 is 80 g /mol at 350K. The percentage of dissociation of N2O4 at 350 K is ?a.10%b.15%c.20%d.18%

How many mole of FeSO4 reacted with one mole of KMnO4 in acidic medium?

Which of the following is not an isomer of allyl alcohol?

Which of the following is not a peroxide?

Which pair of oxides of nitrogen is paramagnetic ?

The correct Schrodinger wave equation for an electron with E as total energy and V as potential energy is

Number of sigma bond in Ethane is options - 2 , 3 ,4 or 5

34. Which one has smallest bond angle? 1.H_2O 2. SO_2 3. SH_2 4. NH_3

What are the three main constituents of soap?

Which of the following alkali metals is smallest in size

Which of the following have α-Hydrogens ?

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio C_{p/_{}}C_{v }is: a)3/2 b)2 c)4/3 d)5/

How to write the block numbers of a element

18.If 6 litres of hydrogen and 4 litres of chlorine are mixed and exploded and if water is added to the gases formed,find the volume of the residual gas.

and are

How many gram of Caco3 reacts completely with 73 g of Hcl ?

Which of the following is used for measuring the mass of costly substances such as gold, silver, diamonds?

Is this formula always applicable, α x molarity = concentration of ions in solution?(α is degree of dissociation)

Two radioactive materials A and B have decay constants 10 λ and λ, respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of A to that of B will be 1e after a time:

Coppercrystallises into a fcc lattice with edge length 3.61 × 10−8cm. Show that the calculated density is in agreement with itsmeasured value of 8.92 g cm−3.

Ph−CH=NO2Hisomerises→3 days(x)(50−50%), Isomer (x) is:

In the aromatic substitution reaction of C6H5Y, the major product (> 60%) is m-isomer, so the group Y is