1708 + Interview Questions in Chemistry Page 4 InterviewSolution

151.	The crystalline salt Na2SO4.xH2O on heating loses 55.9% of its mass and becomes anhydrous. The formula of the crystalline salt is:
Answer» The crystalline salt $N a_{2} S O_{4} . x H_{2} O$ on heating loses 55.9% of its mass and becomes anhydrous. The formula of the crystalline salt is:

Discussion

152.	Which of the following pair(s) is/are isodiaphers?
Answer» Which of the following pair(s) is/are isodiaphers?

Discussion

153.	If Kf value of H2O is 1.86. The value of ∆Tf for 0.1m solution of non-volatile solute is
Answer» If K_f value of H₂O is 1.86. The value of ∆T_f for 0.1m solution of non-volatile solute is

153.

If Kf value of H2O is 1.86. The value of ∆Tf for 0.1m solution of non-volatile solute is

Answer»

If K_f value of H₂O is 1.86. The value of ∆T_f for 0.1m solution of non-volatile solute is

Discussion

154.	For which of the species is Bohr's theory not applicable?
Answer» For which of the species is Bohr's theory not applicable?

Discussion

155.	Which is true about the acidic character of hydroxyl groups of sugars and hydroxyl group of an alcohol ?
Answer» Which is true about the acidic character of hydroxyl groups of sugars and hydroxyl group of an alcohol ?

Discussion

156.	Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from the metal surface?
Answer» Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from the metal surface?

Discussion

157.	The resistance a solution A is 50 ohm and that of solution B is 100 ohm, both solutions are taken in the same conductivity cell. If equal volumes of solution A and B are mixed, what is the resistance of the mixture using the same cell? (Assume there is no change or increase in the α of A and B on mixing)
Answer» The resistance a solution A is 50 ohm and that of solution B is 100 ohm, both solutions are taken in the same conductivity cell. If equal volumes of solution A and B are mixed, what is the resistance of the mixture using the same cell? (Assume there is no change or increase in the α of A and B on mixing)

Discussion

158.	Hydrogen can be obtained from water by
Answer» Hydrogen can be obtained from water by

Discussion

159.	The pair of substances that have no hydrogen bonding is
Answer» The pair of substances that have no hydrogen bonding is

Discussion

160.	0.2 g of a sample of H2O2 required 10 ml of NKMnO4 in a titration in the presence ofH2SO4 . Purity of H2O2 is
Answer» 0.2 g of a sample of $H_{2} O_{2}$ required 10 ml of N $K M n O_{4}$ in a titration in the presence of $H_{2} S O_{4}$ . Purity of $H_{2} O_{2}$ is

Discussion

161.	What you mean by packing fraction in 3D?
Answer» What you mean by packing fraction in 3D?

Discussion

162.	The energy of an electron present in Bohr’s second orbit of hydrogen atom is
Answer» The energy of an electron present in Bohr’s second orbit of hydrogen atom is

Discussion

163.	The reaction involved during the removal of temporary hardness of water is
Answer» The reaction involved during the removal of temporary hardness of water is

Discussion

164.	In which of the following cases, Hoffmann product is the major product?
Answer» In which of the following cases, Hoffmann product is the major product?

Discussion

165.	Which of the following orbitals has a zero probability of finding electrons in the XY plane?
Answer» Which of the following orbitals has a zero probability of finding electrons in the $X Y$ plane?

Discussion

166.	Which of the following will show aromatic behaviour
Answer» Which of the following will show aromatic behaviour

Discussion

167.	Hydrolysis is the reverse of:
Answer» Hydrolysis is the reverse of:

Discussion

168.	Which is an example of a benzylic halide?
Answer» Which is an example of a benzylic halide?

Discussion

169.	Select the order of the following temperatures for a gas:(A) Boyle’s temperature(B) Critical temperature(C) Inversion temperature
Answer» Select the order of the following temperatures for a gas: (A) Boyle’s temperature (B) Critical temperature (C) Inversion temperature

Discussion

170.	What is the chief product obtained when n-butane is treated with bromine in the presence of light at 130∘C
Answer» What is the chief product obtained when n-butane is treated with bromine in the presence of light at $130^{\circ} C$

Discussion

171.	CH3−CH2−CH=CH2 What is the IUPAC name of the following compound?
Answer» $C H_{3} - C H_{2} - C H = C H_{2}$ What is the IUPAC name of the following compound?

Discussion

172.	Which one of the following statements is not true regarding diborane?
Answer» Which one of the following statements is not true regarding diborane?

Discussion

173.	The bond angle in (CH3)2S is close to:
Answer» The bond angle in $(C H_{3})_{2} S$ is close to:

Discussion

174.	Calculate the wavelength associated with an electron moving with a velocity of 1010cm/s.
Answer» Calculate the wavelength associated with an electron moving with a velocity of $10^{10} c m / s .$

Discussion

175.	The dipole moment of H - Br molecule is 2.6×10−30 coulomb.metre. Its bond length is 1.3˚A Then, the percentage ionic character of H - Br bond is:
Answer» The dipole moment of H - Br molecule is $2.6 \times 10^{- 30}$ coulomb.metre. Its bond length is $1.3 ˚ A$ Then, the percentage ionic character of H - Br bond is:

Discussion

176.	Rearrange the following (I to IV) in the order of increasing masses:(I) 0.5 moles of O3(II) 0.5 g atom of oxygen(III) 3.011×1023 molecules of O2(IV) 5.6 litre of CO2 at STP
Answer» Rearrange the following ( $I$ to $I V$ ) in the order of increasing masses: $(I) 0.5 moles of O_{3}$ $(I I) 0.5 g atom of oxygen$ $(I I I) 3.011 \times 10^{23} molecules of O_{2}$ $(I V) 5.6 litre of C O_{2} at STP$

Discussion

177.	If Pauli's exclusion principle was not known, the electronic configuration of Lithium atom would be:
Answer» If Pauli's exclusion principle was not known, the electronic configuration of Lithium atom would be:

Discussion

178.	Reducing nature of the hydrides of group 15 follow the order
Answer» Reducing nature of the hydrides of group 15 follow the order

Discussion

179.	TiCl4 fumes strongly in moist air and is hydrolyzed by water to give
Answer» $T i C l_{4}$ fumes strongly in moist air and is hydrolyzed by water to give

Discussion

180.	Hydrogenation of benzoyl chloride in the presence of Pd and BaSO4 gives
Answer» Hydrogenation of benzoyl chloride in the presence of Pd and $B a S O_{4}$ gives

Discussion

181.	Which of the following violates Hund's Rule?
Answer» Which of the following violates Hund's Rule?

Discussion

182.	An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents. Aqueous solution of M2 on reactionn with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarised in the scheme given below: SCHEME: Reagent S is
Answer» An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents. Aqueous solution of M2 on reactionn with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarised in the scheme given below: SCHEME: Reagent S is

Discussion

183.	Which of the following can be a method of preparation of a carbonate?
Answer» Which of the following can be a method of preparation of a carbonate?

Discussion

184.	How many molecules of oxygen are required for complete combustion of 1 mole of acetylene (C2H2)?
Answer» How many molecules of oxygen are required for complete combustion of 1 mole of acetylene ( $C_{2} H_{2}$ )?

Discussion

185.	Which of the following pair of compounds can be separated by aq. NaHCO3?
Answer» Which of the following pair of compounds can be separated by aq. $N a H C O_{3}$ ?

Discussion

186.	A first order reaction has a rate constant of 10−2sec−1. How long will it take for a 20 g sample to become 5 g?138.6
Answer» A first order reaction has a rate constant of $10^{- 2} s e c^{- 1}$ . How long will it take for a 20 g sample to become 5 g? 138.6

Discussion

187.	Compound (A) and (B) are:-
Answer» Compound (A) and (B) are:-

Discussion

188.	Which of the following has the largest ionization enthalpy?
Answer» Which of the following has the largest ionization enthalpy?

Discussion

189.	In CsCl structure, thecoordination number of Cs+ is[MP PMT 2001]
Answer» In CsCl structure, the coordination number of Cs⁺ is [MP PMT 2001]

189.

In CsCl structure, thecoordination number of Cs+ is[MP PMT 2001]

Answer»

In CsCl structure, the
coordination number of Cs⁺ is

[MP PMT 2001]

Discussion

190.	Osmotic pressure of a solution is
Answer» Osmotic pressure of a solution is

190.

Osmotic pressure of a solution is

Answer»

Osmotic pressure of a solution is

Discussion

191.	Which pair is different from the others?
Answer» Which pair is different from the others?

191.

Which pair is different from the others?

Answer»

Which pair is different from the others?

Discussion

192.	The pH of 10 –10 M solution of NaOH is nearly
Answer» The pH of 10^–10 M solution of NaOH is nearly

Discussion

193.	A given nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by HNO2 to give an unstable compound B. B, on treatment with phenol,forms a beautiful coloured compound C with the molecular formula C12H10N2O. The structure of compound 'A' isRead more on Sarthaks.com - https://www.sarthaks.com/231600/given-nitrogen-containing-aromatic-compound-reacts-with-followed-hno2-unstable-compound
Answer» A given nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by $H N O_{2}$ to give an unstable compound B. B, on treatment with phenol,forms a beautiful coloured compound C with the molecular formula $C_{12} H_{10} N_{2} O$ . The structure of compound 'A' isRead more on Sarthaks.com - https://www.sarthaks.com/231600/given-nitrogen-containing-aromatic-compound-reacts-with-followed-hno2-unstable-compound

Discussion

194.	In Cannizaro reaction, the combination that will not result in a product is :
Answer» In Cannizaro reaction, the combination that will not result in a product is :

Discussion

195.	In equimolar solution of glucose, NaCl and BaCl2, the order of osmotic pressure is as follows:
Answer» In equimolar solution of glucose, NaCl and BaCl₂, the order of osmotic pressure is as follows:

Discussion

196.	Homolytic fission of C - C bond in ethane gives an intermediate in which carbon is?
Answer» Homolytic fission of C - C bond in ethane gives an intermediate in which carbon is?

Discussion

197.	Sulphur dioxide and oxygen react according to the equation :- 2SO2(g)+O2(g)→2SO3(g).If 50.0 g of SO2(g) is added to a flask resulting in a pressure of 0.750 atm.What will be the total pressure in the flask when a stochiometric amount of oxygen is added?What is the pressure after the completion of reaction and before the beginning of the reaction (with O2 just added)?
Answer» Sulphur dioxide and oxygen react according to the equation :- $2 S O_{2} (g) + O_{2} (g) \to 2 S O_{3} (g)$ .If 50.0 g of $S O_{2}$ (g) is added to a flask resulting in a pressure of 0.750 atm.What will be the total pressure in the flask when a stochiometric amount of oxygen is added?What is the pressure after the completion of reaction and before the beginning of the reaction (with $O_{2}$ just added)?

Discussion

198.	If 0.5 moles of BaCl2 is mixed with 0.1 moles of Na3PO4, the maximum amount of Ba3(PO4)2 that can be formed is
Answer» If 0.5 moles of $B a C l_{2}$ is mixed with 0.1 moles of $N a_{3} P O_{4},$ the maximum amount of $B a_{3} (P O_{4})_{2}$ that can be formed is

Discussion

199.	In fluorite structure (CaF2)
Answer» In fluorite structure (CaF₂)

Discussion

200.	Homogeneous system among the following is
Answer» Homogeneous system among the following is

Discussion

Explore topic-wise InterviewSolutions in .

The crystalline salt Na2SO4.xH2O on heating loses 55.9% of its mass and becomes anhydrous. The formula of the crystalline salt is:

Which of the following pair(s) is/are isodiaphers?

If Kf value of H2O is 1.86. The value of ∆Tf for 0.1m solution of non-volatile solute is

For which of the species is Bohr's theory not applicable?

Which is true about the acidic character of hydroxyl groups of sugars and hydroxyl group of an alcohol ?

Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from the metal surface?

Hydrogen can be obtained from water by

The pair of substances that have no hydrogen bonding is

0.2 g of a sample of H2O2 required 10 ml of NKMnO4 in a titration in the presence ofH2SO4 . Purity of H2O2 is

What you mean by packing fraction in 3D?

The energy of an electron present in Bohr’s second orbit of hydrogen atom is

The reaction involved during the removal of temporary hardness of water is

In which of the following cases, Hoffmann product is the major product?

Which of the following orbitals has a zero probability of finding electrons in the XY plane?

Which of the following will show aromatic behaviour

Hydrolysis is the reverse of:

Which is an example of a benzylic halide?

Select the order of the following temperatures for a gas:(A) Boyle’s temperature(B) Critical temperature(C) Inversion temperature

What is the chief product obtained when n-butane is treated with bromine in the presence of light at 130∘C

CH3−CH2−CH=CH2 What is the IUPAC name of the following compound?

Which one of the following statements is not true regarding diborane?

The bond angle in (CH3)2S is close to:

Calculate the wavelength associated with an electron moving with a velocity of 1010cm/s.

The dipole moment of H - Br molecule is 2.6×10−30 coulomb.metre. Its bond length is 1.3˚A Then, the percentage ionic character of H - Br bond is:

Rearrange the following (I to IV) in the order of increasing masses:(I) 0.5 moles of O3(II) 0.5 g atom of oxygen(III) 3.011×1023 molecules of O2(IV) 5.6 litre of CO2 at STP

If Pauli's exclusion principle was not known, the electronic configuration of Lithium atom would be:

Reducing nature of the hydrides of group 15 follow the order

TiCl4 fumes strongly in moist air and is hydrolyzed by water to give

Hydrogenation of benzoyl chloride in the presence of Pd and BaSO4 gives

Which of the following violates Hund's Rule?

Which of the following can be a method of preparation of a carbonate?

How many molecules of oxygen are required for complete combustion of 1 mole of acetylene (C2H2)?

Which of the following pair of compounds can be separated by aq. NaHCO3?

A first order reaction has a rate constant of 10−2sec−1. How long will it take for a 20 g sample to become 5 g?138.6

Compound (A) and (B) are:-

Which of the following has the largest ionization enthalpy?

In CsCl structure, thecoordination number of Cs+ is[MP PMT 2001]

Osmotic pressure of a solution is

Which pair is different from the others?

The pH of 10 –10 M solution of NaOH is nearly

In Cannizaro reaction, the combination that will not result in a product is :

In equimolar solution of glucose, NaCl and BaCl2, the order of osmotic pressure is as follows:

Homolytic fission of C - C bond in ethane gives an intermediate in which carbon is?

If 0.5 moles of BaCl2 is mixed with 0.1 moles of Na3PO4, the maximum amount of Ba3(PO4)2 that can be formed is

In fluorite structure (CaF2)

Homogeneous system among the following is