46295 + Interview Questions in Chemistry Page 44 InterviewSolution

2151.	p – nitro toluene on further nitration gives
Answer» p – nitro toluene on further nitration gives

Discussion

2152.	Find the amount of carbon needed to produce 683 g of Ni(CO)4.C+CO2→CO (Yield of reaction = 70 %)Ni+4CO→Ni(CO)4 (Yield of Mond’s process = 20 %)(Molar mass of Nickel = 58.7 g/mol)
Answer» Find the amount of carbon needed to produce $683 g$ of $N i (C O)_{4}$ . $C + C O_{2} \to C O (Yield of reaction = 70 %)$ $N i + 4 C O \to N i (C O)_{4} (Yield of Mond’s process = 20 %)$ (Molar mass of Nickel = $58.7 g/mol$ )

Discussion

2153.	The correct relation between hydrolysis constant (Ka) and degree of hydrolysis (h) for the following equilibrium is: CH3COO−+H2Ohydrolysis⇌CH3COOH+OH−
Answer» The correct relation between hydrolysis constant ( $K_{a}$ ) and degree of hydrolysis (h) for the following equilibrium is: $C H_{3} C O O^{-} + H_{2} O h y d r o l y s i s ⇌ C H_{3} C O O H + O H^{-}$

Discussion

2154.	An alloy of Au and Cu crystallises in a cubic lattice in which the gold atoms occupy the lattice points at the corners of a cube and the copper atoms occupy the centres of each faces of the cube. What is the empirical formula of this compound?
Answer» An alloy of Au and Cu crystallises in a cubic lattice in which the gold atoms occupy the lattice points at the corners of a cube and the copper atoms occupy the centres of each faces of the cube. What is the empirical formula of this compound?

Discussion

2155.	Derivation of parallax method
Answer» Derivation of parallax method

Discussion

2156.	In a certain solvent phenol dimerises to the extent of 60%. Its observed molecular mass in the solvent would be (M.M Phenol = 94)
Answer» In a certain solvent phenol dimerises to the extent of 60%. Its observed molecular mass in the solvent would be (M.M Phenol = 94)

Discussion

2157.	Magnetic moment of [CoF3(H2o) 3]
Answer» Magnetic moment of [CoF3(H2o) 3]

Discussion

2158.	What is meant by the water of crystallization?
Answer» What is meant by the water of crystallization?

Discussion

2159.	Which is not the correct relation between enthalpy ΔH and intrinsic energy ΔE
Answer» Which is not the correct relation between enthalpy $Δ H$ and intrinsic energy $Δ E$

Discussion

2160.	The gaseous reaction, A(g)→2B(g)+C(g) is found to be first order with respect to A. If the reaction is started with PA = 90mm Hg, the pressure after 10 min is found to be 180 mm Hg. The rate constant of the reaction
Answer» The gaseous reaction, $A (g) \to 2 B (g) + C (g)$ is found to be first order with respect to A. If the reaction is started with PA = 90mm Hg, the pressure after 10 min is found to be 180 mm Hg. The rate constant of the reaction

Discussion

2161.	Give the decreasing order of the reaction rates of the following benzyl alcohol with HBr.
Answer» Give the decreasing order of the reaction rates of the following benzyl alcohol with $H B r$ .

Discussion

2162.	Ch3CO+ more stable than Tertiary carbocation ? Explain ?
Answer» Ch3CO+ more stable than Tertiary carbocation ? Explain ?

Discussion

2163.	Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no. Z=22)
Answer» Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no. $Z = 22$ )

Discussion

2164.	The product is:
Answer» The product is:

Discussion

2165.	the rate constant for first order decomposition if certain reaction is described by the equation log k = 9.27-7.2×10^-3K/T the activation energy of reaction is
Answer» the rate constant for first order decomposition if certain reaction is described by the equation log k = 9.27-7.2×10^-3K/T the activation energy of reaction is

Discussion

2166.	relation between mole fraction and molality
Answer» relation between mole fraction and molality

Discussion

2167.	If a trivalent atom replaces a few silicon atoms in three dimensional network of silicon dioxide, what would be the type of charge on overall structure ?
Answer» If a trivalent atom replaces a few silicon atoms in three dimensional network of silicon dioxide, what would be the type of charge on overall structure ?

Discussion

2168.	How to know that which carbon is alpha carbon in a carbon chain?
Answer» How to know that which carbon is alpha carbon in a carbon chain?

Discussion

2169.	During complete combustion of one mole of butane, 2658 kJ of heat is released. The thermochemical reaction for above change is (a) 2C4H10(g)+13O2(g)→8CO2(g)+10H2O(l); ΔcH=−2658.0kJ mol−1 (b) C4H10(g)+132O2(g)→4CO2(g)+5H2O(l); ΔcH=−1329.0kJ mol−1 (c) C4H10(g)+132O2(g)→4CO2(g)+5H2O(l); ΔcH=−2658.0kJ mol−1 (d) C4H10(g)+132O2(g)→4CO2(g)+5H2O(l); ΔcH=+2658.0kJ mol−1
Answer» During complete combustion of one mole of butane, 2658 kJ of heat is released. The thermochemical reaction for above change is (a) $2 C_{4} H_{10} (g) + 13 O_{2} (g) \to 8 C O_{2} (g) + 10 H_{2} O (l); Δ_{c} H = - 2658.0 k J m o l^{- 1}$ (b) $C_{4} H_{10} (g) + \frac{13}{2} O_{2} (g) \to 4 C O_{2} (g) + 5 H_{2} O (l); Δ_{c} H = - 1329.0 k J m o l^{- 1}$ (c) $C_{4} H_{10} (g) + \frac{13}{2} O_{2} (g) \to 4 C O_{2} (g) + 5 H_{2} O (l); Δ_{c} H = - 2658.0 k J m o l^{- 1}$ (d) $C_{4} H_{10} (g) + \frac{13}{2} O_{2} (g) \to 4 C O_{2} (g) + 5 H_{2} O (l); Δ_{c} H = + 2658.0 k J m o l^{- 1}$

Discussion

2170.	If a solid OQ having NaCl structure is heated so that the ions along one body diagonal are lost and trivalent ions R enter interstitial sites to maintain electrical neutrality so that new empirical formula unit is PxQyRz (x,y,z are smallest possible integers). The value of x+y+z is
Answer» If a solid OQ having NaCl structure is heated so that the ions along one body diagonal are lost and trivalent ions R enter interstitial sites to maintain electrical neutrality so that new empirical formula unit is PxQyRz (x,y,z are smallest possible integers). The value of x+y+z is

Discussion

2171.	Out of the following gases, van der Waals' constant a is maximum in:
Answer» Out of the following gases, van der Waals' constant $a$ is maximum in:

Discussion

2172.	Why are medicines more effective in colloidal state?
Answer» Why are medicines more effective in colloidal state?

Discussion

2173.	Pyrosilicate ion is:
Answer» Pyrosilicate ion is:

Discussion

2174.	24. Molar conductance of which species is highest at infinite dilution? options: 1.H+ 2.Mg++ 3.OH- 4.Li+
Answer» 24. Molar conductance of which species is highest at infinite dilution? options: 1.H+ 2.Mg++ 3.OH- 4.Li+

Discussion

2175.	A: HNO, acts as reducing agent onlyR: HNO, oxidises to HNO only but not reduce byany reducing agent.
Answer» A: HNO, acts as reducing agent onlyR: HNO, oxidises to HNO only but not reduce byany reducing agent.

Discussion

2176.	The density of CaF2(fluorite structure) is 3.18 g/cm3. The length of the side of the unit cell (in pm) is:(Given: NA=6×1023,3√163.5=5.468)
Answer» The density of $C a F_{2}$ (fluorite structure) is $3.18 {g/cm}^{3}$ . The length of the side of the unit cell (in pm) is: (Given: $N_{A} = 6 \times 10^{23}, \sqrt[3]{163.5} = 5.468$ )

Discussion

2177.	0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of Na2SO4 is:
Answer» 0.004 M $N a_{2} S O_{4}$ is isotonic with 0.01 M glucose. Degree of dissociation of $N a_{2} S O_{4}$ is:

Discussion

2178.	why melting and boiling point of bismuth is less than antimony
Answer» why melting and boiling point of bismuth is less than antimony

Discussion

2179.	In a vessel N2, H2 and NH3, are at equilibrium. Some helium gas is introduced into the vessel so that total pressure increases while temperature and volume remain constant. According to Le Chatelier's principle, the dissociation of NH3 (a) increases (c) remains unchanged (d) equilibrium is disturbed. (b) decreases
Answer» In a vessel N2, H2 and NH3, are at equilibrium. Some helium gas is introduced into the vessel so that total pressure increases while temperature and volume remain constant. According to Le Chatelier's principle, the dissociation of NH3 (a) increases (c) remains unchanged (d) equilibrium is disturbed. (b) decreases

Discussion

2180.	Which of the following does not give its oxoacid of central atom on hydrolysis?
Answer» Which of the following does not give its oxoacid of central atom on hydrolysis?

Discussion

2181.	Percentage of free space in a body centred cubic unit cell is:
Answer» Percentage of free space in a body centred cubic unit cell is:

Discussion

2182.	A diatomic ideal gas initially at 273 K is given 100 cal heat due to which system did 209 J work. Molar heat capacity (Cm) of gas for the process is:
Answer» A diatomic ideal gas initially at $273 K$ is given $100 c a l$ heat due to which system did $209 J$ work. Molar heat capacity $(C_{m})$ of gas for the process is:

Discussion

2183.	Which of the following will have high latticeenergy?(1) LiCl(2) MgCl(3) NaCl(4) CSCI
Answer» Which of the following will have high latticeenergy?(1) LiCl(2) MgCl(3) NaCl(4) CSCI

Discussion

2184.	If 2 mole of an ideal gas expanded isothermally at 300 K from 5 litre volume to 50 litre volume then maximum work done in this process will be (1) -11.49 kJ (2) + 11.49 kJ (3) 4.99 kJ (4) - 4.99 kJ
Answer» If 2 mole of an ideal gas expanded isothermally at 300 K from 5 litre volume to 50 litre volume then maximum work done in this process will be (1) -11.49 kJ (2) + 11.49 kJ (3) 4.99 kJ (4) - 4.99 kJ

Discussion

2185.	How to find oxidation charge
Answer» How to find oxidation charge

Discussion

2186.	7. Number of resonating structure in benzene?
Answer» 7. Number of resonating structure in benzene?

Discussion

2187.	Acc.to latice enthalpy concept ionic character is more in LiCl than NaCl,KCl but there is acc.to fajan rule LiCl have high covalent character than these two compound.is it really possible to have both ionic and covalent charcter more than the other two compound
Answer» Acc.to latice enthalpy concept ionic character is more in LiCl than NaCl,KCl but there is acc.to fajan rule LiCl have high covalent character than these two compound.is it really possible to have both ionic and covalent charcter more than the other two compound

Discussion

2188.	2VO + 3Fe2O3 → 6FeO + V2O5 If we start with 2g of VO and 5.75g of Fe2O3, which is the limiting reagent?[V = 47.87g] [Fe = 55.85g]
Answer» $2 V O + 3 F e_{2} O_{3} \to 6 F e O + V_{2} O_{5}$ If we start with 2g of VO and 5.75g of $F e_{2} O_{3}$ , which is the limiting reagent? [V = 47.87g] [Fe = 55.85g]

2188.

2VO + 3Fe2O3 → 6FeO + V2O5 If we start with 2g of VO and 5.75g of Fe2O3, which is the limiting reagent?[V = 47.87g] [Fe = 55.85g]

Answer»

$2 V O + 3 F e_{2} O_{3} \to 6 F e O + V_{2} O_{5}$ If we start with 2g of VO and 5.75g of $F e_{2} O_{3}$ , which is the limiting reagent?

[V = 47.87g] [Fe = 55.85g]

Discussion

2189.	Consider a reaction, aG+bH→Products. When concentration of both the reactants G and H is doubled, the rate increases eight times. However, when concnetration of G is doubled keeping the concentration of H is fixed, the rate is doubled. The overall order of reaction is:
Answer» Consider a reaction, $a G + b H \to P r o d u c t s$ . When concentration of both the reactants $G$ and $H$ is doubled, the rate increases eight times. However, when concnetration of $G$ is doubled keeping the concentration of $H$ is fixed, the rate is doubled. The overall order of reaction is:

Discussion

2190.	Which of the following has lowest pKa value?
Answer» Which of the following has lowest $p K_{a}$ value?

Discussion

2191.	A fly, symmetrical sector of arc length a and radius 3a, mounted on the vertical axis. A charge q is placed at height 4a from the centre along its axis. The flux that passes through fly would be
Answer» A fly, symmetrical sector of arc length a and radius 3a, mounted on the vertical axis. A charge q is placed at height 4a from the centre along its axis. The flux that passes through fly would be

Discussion

2192.	13. When 20 mole of so2 and 15moles of o2 are passed over catalyst 10moles so3 are formed find volume at ntp
Answer» 13. When 20 mole of so2 and 15moles of o2 are passed over catalyst 10moles so3 are formed find volume at ntp

Discussion

2193.	What would be the product formed when 1-Bromo-3-Chloro cyclo butane reacts with two equivalents of metallic sodium in ether?
Answer» What would be the product formed when 1-Bromo-3-Chloro cyclo butane reacts with two equivalents of metallic sodium in ether?

Discussion

2194.	In order to find the strength of a sample of sulphuric acid, 10g of it were taken and a piece of marble weighing 7g placed in it. When the reaction is ceased, the marble piece was dried and it was found to weigh 2.2g. What is percent strength of sulphuric acid
Answer» In order to find the strength of a sample of sulphuric acid, 10g of it were taken and a piece of marble weighing 7g placed in it. When the reaction is ceased, the marble piece was dried and it was found to weigh 2.2g. What is percent strength of sulphuric acid

Discussion

2195.	32 250ml 0.2 M HCl aq. solution + 250ml H2O. What is the final molarity (M) of the solution?
Answer» 32 250ml 0.2 M HCl aq. solution + 250ml H2O. What is the final molarity (M) of the solution?

Discussion

2196.	What is the minimum and maximum oxidation number of chromium
Answer» What is the minimum and maximum oxidation number of chromium

Discussion

2197.	Balance the following equations in basic medium by ion-electron method and oxidation number methods and identify the oxidising agent and the reducing agent. P4(s)+OH−(aq)⟶PH3(g)+HPO−2(aq) N2H4(I)+CIO−3(aq)⟶NO(g)+CI−(g) Cl2O7(g)+H2O2(aq)⟶CIO−2(aq)+O2(g)+H+(aq)
Answer» Balance the following equations in basic medium by ion-electron method and oxidation number methods and identify the oxidising agent and the reducing agent. $P_{4 (s)} + O H -_{(a q)} ⟶ P H_{3 (g)} + H P O_{2 (a q)}^{-}$ $N_{2} H_{4 (I)} + C I O_{3 (a q)}^{-} ⟶ N O_{(g)} + C I_{(g)}^{-}$ $C l_{2} O_{7 (g)} + H_{2} O_{2 (a q)} ⟶ C I O_{2 (a q)}^{-} + O_{2 (g)} + H_{(a q)}^{+}$

2197.

Balance the following equations in basic medium by ion-electron method and oxidation number methods and identify the oxidising agent and the reducing agent. P4(s)+OH−(aq)⟶PH3(g)+HPO−2(aq) N2H4(I)+CIO−3(aq)⟶NO(g)+CI−(g) Cl2O7(g)+H2O2(aq)⟶CIO−2(aq)+O2(g)+H+(aq)

Answer»

Balance the following equations in basic medium by ion-electron method and oxidation number methods and identify the oxidising agent and the reducing agent.
$P_{4 (s)} + O H -_{(a q)} ⟶ P H_{3 (g)} + H P O_{2 (a q)}^{-}$

$N_{2} H_{4 (I)} + C I O_{3 (a q)}^{-} ⟶ N O_{(g)} + C I_{(g)}^{-}$

$C l_{2} O_{7 (g)} + H_{2} O_{2 (a q)} ⟶ C I O_{2 (a q)}^{-} + O_{2 (g)} + H_{(a q)}^{+}$

Discussion

2198.	The condition not satisfied by an ideal solution
Answer» The condition not satisfied by an ideal solution

Discussion

2199.	Consider the following chloridesThe correct order of SN1 reactivity is
Answer» Consider the following chlorides The correct order of $S N_{1}$ reactivity is

2199.

Consider the following chloridesThe correct order of SN1 reactivity is

Answer»

Consider the following chlorides

The correct order of $S N_{1}$ reactivity is

Discussion

2200.	how many nodal planes are there in 2s and 4s
Answer» how many nodal planes are there in 2s and 4s

Discussion

Explore topic-wise InterviewSolutions in .

p – nitro toluene on further nitration gives

Find the amount of carbon needed to produce 683 g of Ni(CO)4.C+CO2→CO (Yield of reaction = 70 %)Ni+4CO→Ni(CO)4 (Yield of Mond’s process = 20 %)(Molar mass of Nickel = 58.7 g/mol)

The correct relation between hydrolysis constant (Ka) and degree of hydrolysis (h) for the following equilibrium is: CH3COO−+H2Ohydrolysis⇌CH3COOH+OH−

An alloy of Au and Cu crystallises in a cubic lattice in which the gold atoms occupy the lattice points at the corners of a cube and the copper atoms occupy the centres of each faces of the cube. What is the empirical formula of this compound?

Derivation of parallax method

In a certain solvent phenol dimerises to the extent of 60%. Its observed molecular mass in the solvent would be (M.M Phenol = 94)

Magnetic moment of [CoF3(H2o) 3]

What is meant by the water of crystallization?

Which is not the correct relation between enthalpy ΔH and intrinsic energy ΔE

The gaseous reaction, A(g)→2B(g)+C(g) is found to be first order with respect to A. If the reaction is started with PA = 90mm Hg, the pressure after 10 min is found to be 180 mm Hg. The rate constant of the reaction

Give the decreasing order of the reaction rates of the following benzyl alcohol with HBr.

Ch3CO+ more stable than Tertiary carbocation ? Explain ?

Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no. Z=22)

The product is:

the rate constant for first order decomposition if certain reaction is described by the equation log k = 9.27-7.2×10^-3K/T the activation energy of reaction is ​

relation between mole fraction and molality

If a trivalent atom replaces a few silicon atoms in three dimensional network of silicon dioxide, what would be the type of charge on overall structure ?

How to know that which carbon is alpha carbon in a carbon chain?

If a solid OQ having NaCl structure is heated so that the ions along one body diagonal are lost and trivalent ions R enter interstitial sites to maintain electrical neutrality so that new empirical formula unit is PxQyRz (x,y,z are smallest possible integers). The value of x+y+z is

Out of the following gases, van der Waals' constant a is maximum in:

Why are medicines more effective in colloidal state?

Pyrosilicate ion is:

24. Molar conductance of which species is highest at infinite dilution? options: 1.H+ 2.Mg++ 3.OH- 4.Li+

A: HNO, acts as reducing agent onlyR: HNO, oxidises to HNO only but not reduce byany reducing agent.

The density of CaF2(fluorite structure) is 3.18 g/cm3. The length of the side of the unit cell (in pm) is:(Given: NA=6×1023,3√163.5=5.468)

0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of Na2SO4 is:

why melting and boiling point of bismuth is less than antimony

Which of the following does not give its oxoacid of central atom on hydrolysis?

Percentage of free space in a body centred cubic unit cell is:

A diatomic ideal gas initially at 273 K is given 100 cal heat due to which system did 209 J work. Molar heat capacity (Cm) of gas for the process is:

Which of the following will have high latticeenergy?(1) LiCl(2) MgCl(3) NaCl(4) CSCI

If 2 mole of an ideal gas expanded isothermally at 300 K from 5 litre volume to 50 litre volume then maximum work done in this process will be (1) -11.49 kJ (2) + 11.49 kJ (3) 4.99 kJ (4) - 4.99 kJ

How to find oxidation charge

7. Number of resonating structure in benzene?

Acc.to latice enthalpy concept ionic character is more in LiCl than NaCl,KCl but there is acc.to fajan rule LiCl have high covalent character than these two compound.is it really possible to have both ionic and covalent charcter more than the other two compound

2VO + 3Fe2O3 → 6FeO + V2O5 If we start with 2g of VO and 5.75g of Fe2O3, which is the limiting reagent?[V = 47.87g] [Fe = 55.85g]

Consider a reaction, aG+bH→Products. When concentration of both the reactants G and H is doubled, the rate increases eight times. However, when concnetration of G is doubled keeping the concentration of H is fixed, the rate is doubled. The overall order of reaction is:

Which of the following has lowest pKa value?

A fly, symmetrical sector of arc length a and radius 3a, mounted on the vertical axis. A charge q is placed at height 4a from the centre along its axis. The flux that passes through fly would be

13. When 20 mole of so2 and 15moles of o2 are passed over catalyst 10moles so3 are formed find volume at ntp

What would be the product formed when 1-Bromo-3-Chloro cyclo butane reacts with two equivalents of metallic sodium in ether?

In order to find the strength of a sample of sulphuric acid, 10g of it were taken and a piece of marble weighing 7g placed in it. When the reaction is ceased, the marble piece was dried and it was found to weigh 2.2g. What is percent strength of sulphuric acid

32 250ml 0.2 M HCl aq. solution + 250ml H2O. What is the final molarity (M) of the solution?

What is the minimum and maximum oxidation number of chromium

Balance the following equations in basic medium by ion-electron method and oxidation number methods and identify the oxidising agent and the reducing agent. P4(s)+OH−(aq)⟶PH3(g)+HPO−2(aq) N2H4(I)+CIO−3(aq)⟶NO(g)+CI−(g) Cl2O7(g)+H2O2(aq)⟶CIO−2(aq)+O2(g)+H+(aq)

The condition not satisfied by an ideal solution

Consider the following chloridesThe correct order of SN1 reactivity is

how many nodal planes are there in 2s and 4s

the rate constant for first order decomposition if certain reaction is described by the equation log k = 9.27-7.2×10^-3K/T the activation energy of reaction is