1708 + Interview Questions in Chemistry Page 5 InterviewSolution

201.	Total hereditary material outside the chromosome is called
Answer» Total hereditary material outside the chromosome is called

Discussion

202.	Carbon is known to form long chains of carbon atoms. This property is known as?
Answer» Carbon is known to form long chains of carbon atoms. This property is known as?

Discussion

203.	In the given reactionthe product P is :-
Answer» In the given reaction the product P is :-

Discussion

204.	A system in which no thermal energy passes into or out of the system is called
Answer» A system in which no thermal energy passes into or out of the system is called

Discussion

205.	The correct order of increasing basicity of the given conjugate bases (R=CH3) is
Answer» The correct order of increasing basicity of the given conjugate bases $(R = C H_{3})$ is

Discussion

206.	The vapour pressure of Benzene at 25∘ is 639.7mm of Hg. The vapour pressure of a solution of benzene at same temperature is 631.9 mm of Hg. The molality of solution is:
Answer» The vapour pressure of Benzene at $25^{\circ}$ is 639.7mm of Hg. The vapour pressure of a solution of benzene at same temperature is 631.9 mm of Hg. The molality of solution is:

Discussion

207.	The KP value for the reaction H2(g)+I2(g)⇌2HI(g) at 460 oC is 49. If the initial pressure of H2 and I2 is 0.5 atm respectively, determine the partial pressure of H2 at equilibrium.
Answer» The $K_{P}$ value for the reaction $H_{2} (g) + I_{2} (g) ⇌ 2 H I (g)$ at $460^{o} C$ is 49. If the initial pressure of $H_{2}$ and $I_{2}$ is $0.5 a t m$ respectively, determine the partial pressure of $H_{2}$ at equilibrium.

Discussion

208.	Which of the following is the correct structure of Ethanenitrile?
Answer» Which of the following is the correct structure of Ethanenitrile?

Discussion

209.	In the given reaction, B2H6+2KOH+2X→2Y+6H2, X and Y are respectively
Answer» In the given reaction, $B_{2} H_{6} + 2 K O H + 2 X \to 2 Y + 6 H_{2},$ X and Y are respectively

Discussion

210.	Name the gas that can readily decolourise acidified KMnO4 solution.
Answer» Name the gas that can readily decolourise acidified $K M n O_{4}$ solution.

Discussion

211.	Which of the following reactions are used for the preparation of the halogen acid?
Answer» Which of the following reactions are used for the preparation of the halogen acid?

Discussion

212.	Two blocks of the same metal having same mass and at temperature T1 and T2 respectively, are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, △S for this process is
Answer» Two blocks of the same metal having same mass and at temperature $T_{1}$ and $T_{2}$ respectively, are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, $△ S$ for this process is

Discussion

213.	What would be the probable product(s) of the above reaction?
Answer» What would be the probable product(s) of the above reaction?

Discussion

214.	Oxidizing action increases in the following order:
Answer» Oxidizing action increases in the following order:

Discussion

215.	The correct order of polarizability is I−,Br−,Cl−,F−
Answer» The correct order of polarizability is $I^{-}, B r^{-}, C l^{-}, F^{-}$

Discussion

216.	Which of the following atomic numbers is not matched with their correct electronic configuration?
Answer» Which of the following atomic numbers is not matched with their correct electronic configuration?

Discussion

217.	Consider an acidic buffer solution of acetic acid and sodium acetate at 25oC. What should be the ratio of concentration of sodium acetate and acetic acid so that pH=5 is obtained ?Given :Ka value of acetic acid is 1.8×10−5 log101.8=0.25 and 10(0.25)=1.8
Answer» Consider an acidic buffer solution of acetic acid and sodium acetate at $25^{o} C$ . What should be the ratio of concentration of sodium acetate and acetic acid so that $p H = 5$ is obtained ? Given : $K_{a}$ value of acetic acid is $1.8 \times 10^{- 5}$ ${log}_{10} 1.8 = 0.25 and 10^{(0.25)} = 1.8$

Discussion

218.	The molar conductivity of a 0.5 mol/dm3 solution of AgNO3 with electrolytic conductiviy of 5.76×10−3 S cm−1 at 298 K is
Answer» The molar conductivity of a $0.5 m o l / d m^{3}$ solution of $A g N O_{3}$ with electrolytic conductiviy of $5.76 \times 10^{- 3} S c m^{- 1}$ at 298 K is

Discussion

219.	Choose the given reaction(s) in which water act as an oxidising agent.
Answer» Choose the given reaction(s) in which water act as an oxidising agent.

Discussion

220.	A solution that obeys Raoult's law is:
Answer» A solution that obeys Raoult's law is:

Discussion

221.	In the reactionCH3CH=CH2+H2O+[O]KMnO4−−−−−→AcidCH3−CH−CH2[O]−→X+HCOOH \| \| OH OHX is
Answer» In the reaction $C H_{3} C H = C H_{2} + H_{2} O + [O] K M n O_{4} - ---- \to A c i d$ $C H_{3} - C H - C H_{2} [O] - \to X + H C O O H \| \| O H O H$ X is

Discussion

222.	Which of the following solutions will alter the pH of the solution on dilution?
Answer» Which of the following solutions will alter the pH of the solution on dilution?

Discussion

223.	A proton is accelerated through a potential difference of V volts. The de Broglie's wavelength associated with it is:
Answer» A proton is accelerated through a potential difference of $V$ volts. The de Broglie's wavelength associated with it is:

Discussion

224.	For the combustion of 1 mole of a liquid benzene at 25oC, the enthalpy is given by:C6H6(l)+152O2(g)→6CO2(g)+3H2O(l) ΔH=−780980 calWhat would be the internal energy of the reaction?
Answer» For the combustion of 1 mole of a liquid benzene at $25^{o} C$ , the enthalpy is given by: $C_{6} H_{6} (l) + \frac{15}{2} O_{2} (g) \to 6 C O_{2} (g) + 3 H_{2} O (l)$ $Δ H = - 780980$ cal What would be the internal energy of the reaction?

Discussion

225.	The compound YBa2Cu3O7 which shows superconductivity has copper in oxidation state ........ Assume that the rare earth element Yttrium is in its usual +3 oxidation state
Answer» The compound Y $B a_{2} C u_{3} O_{7}$ which shows superconductivity has copper in oxidation state ........ Assume that the rare earth element Yttrium is in its usual +3 oxidation state

225.

The compound YBa2Cu3O7 which shows superconductivity has copper in oxidation state ........ Assume that the rare earth element Yttrium is in its usual +3 oxidation state

Answer»

The compound Y $B a_{2} C u_{3} O_{7}$ which shows superconductivity has copper in oxidation state ........ Assume that the rare earth element Yttrium is in its usual +3 oxidation state

Discussion

226.	Identify the correct statement regarding enzymes.
Answer» Identify the correct statement regarding enzymes.

Discussion

227.	By Wurtz reaction, a mixture of methyliodide and ethyliodide gives
Answer» By Wurtz reaction, a mixture of methyliodide and ethyliodide gives

Discussion

228.	The correct increasing order of boiling points of the following compound isA. Isopentane B. n - butyl alcohol C. n - butyl amine D. Diethyl amine
Answer» The correct increasing order of boiling points of the following compound is A. Isopentane B. n - butyl alcohol C. n - butyl amine D. Diethyl amine

228.

The correct increasing order of boiling points of the following compound isA. Isopentane B. n - butyl alcohol C. n - butyl amine D. Diethyl amine

Answer»

The correct increasing order of boiling points of the following compound is

A. Isopentane B. n - butyl alcohol

C. n - butyl amine D. Diethyl amine

Discussion

229.	The decreasing order of basic strengths of the following compounds is:
Answer» The decreasing order of basic strengths of the following compounds is:

Discussion

230.	Nylon yarns are usually
Answer» Nylon yarns are usually

Discussion

231.	Find the ratio of em of an alpha particle to to that of a neutron.
Answer» Find the ratio of $\frac{e}{m}$ of an alpha particle to to that of a neutron.

Discussion

232.	Electrolytes when dissolved in water dissociate into their constituent ions. The degree of dissociation of an electrolyte increases with
Answer» Electrolytes when dissolved in water dissociate into their constituent ions. The degree of dissociation of an electrolyte increases with

232.

Electrolytes when dissolved in water dissociate into their constituent ions. The degree of dissociation of an electrolyte increases with

Answer»

Electrolytes when dissolved in water dissociate into their constituent ions.

The degree of dissociation of an electrolyte increases with

Discussion

233.	For the given reaction :
Answer» For the given reaction :

Discussion

234.	Assertion: LDPE is a branched polymer Reason: It is prepared by coordination polymerization of ethylene
Answer» Assertion: LDPE is a branched polymer Reason: It is prepared by coordination polymerization of ethylene

Discussion

235.	Match the column: Column−I Column−II(a)[Ag(NH3)2]+(p)Octahedral(b)[Cu(NH3)4]2+(q)Tetrahedral(c)[Cr(H2O)6]2+(r)Trigonal bipyramidal(d)[Fe(CO)5](s)Square planar (t)Linear
Answer» Match the column: $\begin{matrix} C o l u m n - I & C o l u m n - I I (a) & [A g (N H_{3})_{2}]^{+} & (p) & O c t a h e d r a l (b) & [C u (N H_{3})_{4}]^{2 +} & (q) & T e t r a h e d r a l (c) & [C r (H_{2} O)_{6}]^{2 +} & (r) & T r i g o n a l b i p y r a m i d a l (d) & [F e (C O)_{5}] & (s) & S q u a r e p l a n a r (t) & L i n e a r \end{matrix}$

Discussion

236.	The amount of anhydrous Na2CO3 present in 250 mL of 0.25 M solution is:
Answer» The amount of anhydrous $N a_{2} C O_{3}$ present in 250 mL of 0.25 M solution is:

Discussion

237.	A solution of NaCN is
Answer» A solution of NaCN is

Discussion

238.	To 1L solution containing 0.1 mol each of NH3 and NH4Cl,0.05 mol of NaOH is added. The change in pH will be (pKb for NH3=4.74)
Answer» To 1L solution containing 0.1 mol each of $N H_{3}$ and $N H_{4} C l, 0.05$ mol of NaOH is added. The change in pH will be $(p K_{b} f o r N H_{3} = 4.74)$

Discussion

239.	Generally, for which of the following ores, froth floatation method is used for concentration?
Answer» Generally, for which of the following ores, froth floatation method is used for concentration?

Discussion

240.	Ionisation energy of He+ is 8.71×10−18 J atom−1. The energy of the first stationary state (n = 1) of Li2+ is:
Answer» Ionisation energy of $H e^{+}$ is $8.71 \times 10^{- 18} J a t o m^{- 1}$ . The energy of the first stationary state (n = 1) of $L i^{2 +}$ is:

Discussion

241.	If the solubility of lithium sodium hexafluoride aluminate, Li3Na3(AlF6)2 is ′s′ mol/L, its solubility product is equal to :
Answer» If the solubility of lithium sodium hexafluoride aluminate, $L i_{3} N a_{3} (A l F_{6})_{2}$ is $^{'} s^{'}$ mol/L, its solubility product is equal to :

Discussion

242.	What is the ratio of monochlorinated product(s) formed from the above reaction, if all the hydrogens were abstracted at equal rates?
Answer» What is the ratio of monochlorinated product(s) formed from the above reaction, if all the hydrogens were abstracted at equal rates?

Discussion

243.	Which of the following is/are crystalline form(s) of carbon?
Answer» Which of the following is/are crystalline form(s) of carbon?

Discussion

244.	Which of the following ion will be most effective in coagulating organic sulphid sol?
Answer» Which of the following ion will be most effective in coagulating organic sulphid sol?

Discussion

245.	In a radioactive sample the decrease in the number of active nuclei at any time is directly proportional to?
Answer» In a radioactive sample the decrease in the number of active nuclei at any time is directly proportional to?

Discussion

246.	Which of the following is the weakest acid? (pKa values given at 25oC)
Answer» Which of the following is the weakest acid? ( $p K_{a}$ values given at $25^{o} C$ )

Discussion

247.	Atomic numbers of elements are given below. Which of them would have the least electronegativity?
Answer» Atomic numbers of elements are given below. Which of them would have the least electronegativity?

Discussion

248.	A beaker contains 0.1 M H2SO4 solution; of 100 ml. Another 100 ml, 0.1 M HCl of it is added to the beaker. (I) What is the initial number of millimoles of H+ ions?(II) What is the final concentration of H+ ions?
Answer» A beaker contains 0.1 M $H_{2} S O_{4}$ solution; of 100 ml. Another 100 ml, 0.1 M $H C l$ of it is added to the beaker. (I) What is the initial number of millimoles of $H^{+}$ ions? (II) What is the final concentration of $H^{+}$ ions?

Discussion

249.	Which of the following reactions produce phenol?
Answer» Which of the following reactions produce phenol?

Discussion

250.	A chemical equation is balanced according to the law of
Answer» A chemical equation is balanced according to the law of

Discussion

Explore topic-wise InterviewSolutions in .

Total hereditary material outside the chromosome is called

Carbon is known to form long chains of carbon atoms. This property is known as?

In the given reactionthe product P is :-

A system in which no thermal energy passes into or out of the system is called

The correct order of increasing basicity of the given conjugate bases (R=CH3) is

The vapour pressure of Benzene at 25∘ is 639.7mm of Hg. The vapour pressure of a solution of benzene at same temperature is 631.9 mm of Hg. The molality of solution is:

The KP value for the reaction H2(g)+I2(g)⇌2HI(g) at 460 oC is 49. If the initial pressure of H2 and I2 is 0.5 atm respectively, determine the partial pressure of H2 at equilibrium.

Which of the following is the correct structure of Ethanenitrile?

In the given reaction, B2H6+2KOH+2X→2Y+6H2, X and Y are respectively

Name the gas that can readily decolourise acidified KMnO4 solution.

Which of the following reactions are used for the preparation of the halogen acid?

Two blocks of the same metal having same mass and at temperature T1 and T2 respectively, are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, △S for this process is

What would be the probable product(s) of the above reaction?

Oxidizing action increases in the following order:

The correct order of polarizability is I−,Br−,Cl−,F−

Which of the following atomic numbers is not matched with their correct electronic configuration?

Consider an acidic buffer solution of acetic acid and sodium acetate at 25oC. What should be the ratio of concentration of sodium acetate and acetic acid so that pH=5 is obtained ?Given :Ka value of acetic acid is 1.8×10−5 log101.8=0.25 and 10(0.25)=1.8

The molar conductivity of a 0.5 mol/dm3 solution of AgNO3 with electrolytic conductiviy of 5.76×10−3 S cm−1 at 298 K is

Choose the given reaction(s) in which water act as an oxidising agent.

A solution that obeys Raoult's law is:

In the reactionCH3CH=CH2+H2O+[O]KMnO4−−−−−→AcidCH3−CH−CH2[O]−→X+HCOOH | | OH OHX is

Which of the following solutions will alter the pH of the solution on dilution?

A proton is accelerated through a potential difference of V volts. The de Broglie's wavelength associated with it is:

For the combustion of 1 mole of a liquid benzene at 25oC, the enthalpy is given by:C6H6(l)+152O2(g)→6CO2(g)+3H2O(l) ΔH=−780980 calWhat would be the internal energy of the reaction?

The compound YBa2Cu3O7 which shows superconductivity has copper in oxidation state ........ Assume that the rare earth element Yttrium is in its usual +3 oxidation state

Identify the correct statement regarding enzymes.

By Wurtz reaction, a mixture of methyliodide and ethyliodide gives

The correct increasing order of boiling points of the following compound isA. Isopentane B. n - butyl alcohol C. n - butyl amine D. Diethyl amine

The decreasing order of basic strengths of the following compounds is:

Nylon yarns are usually

Find the ratio of em of an alpha particle to to that of a neutron.

Electrolytes when dissolved in water dissociate into their constituent ions. The degree of dissociation of an electrolyte increases with

For the given reaction :

Assertion: LDPE is a branched polymer Reason: It is prepared by coordination polymerization of ethylene

Match the column: Column−I Column−II(a)[Ag(NH3)2]+(p)Octahedral(b)[Cu(NH3)4]2+(q)Tetrahedral(c)[Cr(H2O)6]2+(r)Trigonal bipyramidal(d)[Fe(CO)5](s)Square planar (t)Linear

The amount of anhydrous Na2CO3 present in 250 mL of 0.25 M solution is:

A solution of NaCN is

To 1L solution containing 0.1 mol each of NH3 and NH4Cl,0.05 mol of NaOH is added. The change in pH will be (pKb for NH3=4.74)

Generally, for which of the following ores, froth floatation method is used for concentration?

Ionisation energy of He+ is 8.71×10−18 J atom−1. The energy of the first stationary state (n = 1) of Li2+ is:

If the solubility of lithium sodium hexafluoride aluminate, Li3Na3(AlF6)2 is ′s′ mol/L, its solubility product is equal to :

What is the ratio of monochlorinated product(s) formed from the above reaction, if all the hydrogens were abstracted at equal rates?

Which of the following is/are crystalline form(s) of carbon?

Which of the following ion will be most effective in coagulating organic sulphid sol?

In a radioactive sample the decrease in the number of active nuclei at any time is directly proportional to?

Which of the following is the weakest acid? (pKa values given at 25oC)

Atomic numbers of elements are given below. Which of them would have the least electronegativity?

A beaker contains 0.1 M H2SO4 solution; of 100 ml. Another 100 ml, 0.1 M HCl of it is added to the beaker. (I) What is the initial number of millimoles of H+ ions?​(II) What is the final concentration of H+ ions?

Which of the following reactions produce phenol?

A chemical equation is balanced according to the law of

A beaker contains 0.1 M H2SO4 solution; of 100 ml. Another 100 ml, 0.1 M HCl of it is added to the beaker. (I) What is the initial number of millimoles of H+ ions?(II) What is the final concentration of H+ ions?