2600 + Interview Questions in Chemistry Page 47 InterviewSolution

2301.	The gaseous reaction : A(g)+nB(g)⇌mC(g) is represented by the following curveswhat is the value of n+m
Answer» The gaseous reaction : $A (g) + n B (g) ⇌ m C (g)$ is represented by the following curves what is the value of $n + m$

Discussion

2302.	Which is the correct energy profile diagram for the following solvolysis reaction?
Answer» Which is the correct energy profile diagram for the following solvolysis reaction?

Discussion

2303.	Urea reacts with hydrazine to give:
Answer» Urea reacts with hydrazine to give:

Discussion

2304.	What are the conditions for an ideal solution?
Answer» What are the conditions for an ideal solution?

Discussion

2305.	Methyl alcohol can be distinguished from ethyl alcohol using [KCET 1984; BHU 2000]
Answer» Methyl alcohol can be distinguished from ethyl alcohol using [KCET 1984; BHU 2000]

Discussion

2306.	If an element A shows two oxidation states +2 and +3. A forms oxides in such a way that they have a ratio 1 : 3 in a compound, the formula of the compound will be
Answer» If an element A shows two oxidation states $+ 2$ and $+ 3$ . A forms oxides in such a way that they have a ratio 1 : 3 in a compound, the formula of the compound will be

Discussion

2307.	The enolic form of ethyl acetoacetate as below has
Answer» The enolic form of ethyl acetoacetate as below has

Discussion

2308.	Number of angular nodes in 3d_____
Answer» Number of angular nodes in 3d_____

Discussion

2309.	For the water gas reaction, C(s)+H2O(g)⇌CO(g)+H2(g)the standard Gibbs free energy of reaction (at 1000 K) is −8.1 kJ/mol. Calculate its equilibrium constantantilog 0.423=2.6485
Answer» For the water gas reaction, $C (s) + H_{2} O (g) ⇌ C O (g) + H_{2} (g)$ the standard Gibbs free energy of reaction (at $1000 K$ ) is $- 8.1 k J / m o l .$ Calculate its equilibrium constant antilog 0.423=2.6485

Discussion

2310.	Which among the following are isoelectronic NO−3,CO2−3,ClO−3,SO2
Answer» Which among the following are isoelectronic $N O_{3}^{-}, C O_{3}^{2 -}, C l O_{3}^{-}, S O_{2}$

Discussion

2311.	Calculate packing fraction from the following figure to two decimal places. Multiply it by 100 and enter the value.___
Answer» Calculate packing fraction from the following figure to two decimal places. Multiply it by 100 and enter the value. ___

2311.

Calculate packing fraction from the following figure to two decimal places. Multiply it by 100 and enter the value.___

Answer»

Calculate packing fraction from the following figure to two decimal places. Multiply it by 100 and enter the value.

___

Discussion

2312.	Energy of an electron is given by E=−2.178×10−18 J×Z2n2:Wavelength of light required to excite an electron in an hydrogen atom from level n=1 to n=2 will be (h=6.62×10−34 J s and c=3.0×108 m s−1 )
Answer» Energy of an electron is given by $E = - 2.178 \times 10^{- 18} J \times \frac{Z^{2}}{n^{2}}$ : Wavelength of light required to excite an electron in an hydrogen atom from level $n = 1$ to $n = 2$ will be ( $h = 6.62 \times 10^{- 34} J s$ and $c = 3.0 \times 10^{8} m s^{- 1}$ )

Discussion

2313.	The principal products obtained on reaction of iodine with cold and dilute caustic soda solution are:
Answer» The principal products obtained on reaction of iodine with cold and dilute caustic soda solution are:

Discussion

2314.	In the cell: Zn, Zn2+(aq) \|\| H+(aq), H2(1 atm)Pt, during the working, the pH around cathode
Answer» In the cell: Zn, Zn²⁺(aq) \|\| H⁺(aq), H₂(1 atm)Pt, during the working, the p^H around cathode

Discussion

2315.	H3PO4 is a tribasic acid and one of its salt is NaH2PO4. What volume of 1M NaOH solution should be added to 12 g ofNaH2PO4 to convert it intoNa3PO4?
Answer» $H_{3} P O_{4}$ is a tribasic acid and one of its salt is $N a H_{2} P O_{4}$ . What volume of 1M NaOH solution should be added to 12 g of $N a H_{2} P O_{4}$ to convert it into $N a_{3} P O_{4}$ ?

Discussion

2316.	Substances used in bringing down the temperature in high fevers are called [DPMT 1983]
Answer» Substances used in bringing down the temperature in high fevers are called [DPMT 1983]

Discussion

2317.	Van der waals constant "b" of helium is 24 mL mol−1. Find molecular diameter of helium.
Answer» Van der waals constant "b" of helium is $24 m L m o l^{- 1}$ . Find molecular diameter of helium.

Discussion

2318.	Which of the following is the fischer projection of the compound given below?
Answer» Which of the following is the fischer projection of the compound given below?

Discussion

2319.	Which of thefollowing is the correct order of boiling points
Answer» Which of thefollowing is the correct order of boiling points

Discussion

2320.	Which of the following species are formed by Lewis acid-base interaction?
Answer» Which of the following species are formed by Lewis acid-base interaction?

Discussion

2321.	Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen?
Answer» Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen?

Discussion

2322.	What will be the volume of 0.1 M H2SO4 solution required to neutralize 40 mL of 0.1 M KOH solution ?
Answer» What will be the volume of $0.1 M H_{2} S O_{4}$ solution required to neutralize $40 m L$ of $0.1 M K O H$ solution ?

Discussion

2323.	What volume of oxygen gas (O2) measured at 0∘C and 1 atm is needed to burn 1 L of propane gas (C3H8) completely, measured under the same conditions?
Answer» What volume of oxygen gas $(O_{2})$ measured at $0^{\circ} C$ and $1 atm$ is needed to burn $1 L$ of propane gas $(C_{3} H_{8})$ completely, measured under the same conditions?

Discussion

2324.	The driving force for the completion of Claisen condensation between ethyl acetate and sodium ethoxide to ethyl acetoacetate is
Answer» The driving force for the completion of Claisen condensation between ethyl acetate and sodium ethoxide to ethyl acetoacetate is

Discussion

2325.	Oxygen and nitrogen are present in a mixture in the ratio of 1:4. Calculate the ratio of their number of molecules in the mixture.
Answer» Oxygen and nitrogen are present in a mixture in the ratio of $1 : 4$ . Calculate the ratio of their number of molecules in the mixture.

Discussion

2326.	What will be the ratio of partial pressures of 10 moles of He and 5 moles of CH4 present in a reaction mixture?
Answer» What will be the ratio of partial pressures of $10$ moles of $H e$ and $5$ moles of $C H_{4}$ present in a reaction mixture?

Discussion

2327.	The specific rate for a reaction increases by a factor of 4, if the temperature is changed from 27 ∘C to 52 ∘C. Find the activation energy for the reaction in kJ mol−1 (Take ln2=0.7, R (gas const) = 253 J/mol K) (Round off the answer upto two decimal places)
Answer» The specific rate for a reaction increases by a factor of 4, if the temperature is changed from $27^{\circ} C$ to $52^{\circ} C$ . Find the activation energy for the reaction in $k J m o l^{- 1}$ (Take $l n 2 = 0.7$ , R (gas const) = $\frac{25}{3} J / m o l K$ ) (Round off the answer upto two decimal places)

Discussion

2328.	3000 J of heat is given to a gas at a constant pressure of P =(2×105 N/m2).If its volume increases by 10 litres during the process, find the change in the internal energy of the gas.
Answer» $3000 J$ of heat is given to a gas at a constant pressure of $P = (2 \times 10^{5} N / m^{2})$ . If its volume increases by 10 litres during the process, find the change in the internal energy of the gas.

Discussion

2329.	Which of the following will give a pair of enantiomers?
Answer» Which of the following will give a pair of enantiomers?

Discussion

2330.	The pH of a solution containing 0.4 M HCO−3 and 0.2 M CO2−3 is:[Ka1(H2CO3)=4×10−7;Ka2(HCO−3)=4×10−11](Given, log 4=0.60, log 0.5=−0.3)
Answer» The $p H$ of a solution containing $0.4 M$ $H C O_{3}^{-}$ and $0.2 M$ $C O_{3}^{2 -}$ is: $[K_{a_{1}} (H_{2} C O_{3}) = 4 \times 10^{- 7}; K_{a_{2}} (H C O_{3}^{-}) = 4 \times 10^{- 11}]$ $(G i v e n, l o g 4 = 0.60, l o g 0.5 = - 0.3)$

Discussion

2331.	In the given reaction: CH2=CH−CHO→ CH2=CH−CH2OH in the presence of X, what will be X:
Answer» In the given reaction: $C H_{2} = C H - C H O \to C H_{2} = C H - C H_{2} O H$ in the presence of X, what will be X:

Discussion

2332.	Which of the following is not related to the metallurgy of Zinc?
Answer» Which of the following is not related to the metallurgy of Zinc?

Discussion

2333.	Suggest the reagents for the following conversion.
Answer» Suggest the reagents for the following conversion.

Discussion

2334.	What is the ratio of the empirical formula mass to the molecular formula mass of benzene?
Answer» What is the ratio of the empirical formula mass to the molecular formula mass of benzene?

Discussion

2335.	Decomposition of H2O2 is a
Answer» Decomposition of $H_{2}$ $O_{2}$ is a

Discussion

2336.	If the boiling point of an aqueous solution containing a non-volatile solute is 100.15∘C. What is its freezing point? Given latent heat of fusion and vapourization of water 80calg−1 and 540calg−1, respectively.
Answer» If the boiling point of an aqueous solution containing a non-volatile solute is ${100.15}^{\circ} C$ . What is its freezing point? Given latent heat of fusion and vapourization of water $80 c a l g^{- 1}$ and $540 c a l g^{- 1}$ , respectively.

Discussion

2337.	Which of the following configurations will have the least electron affinity?
Answer» Which of the following configurations will have the least electron affinity?

Discussion

2338.	Select the correct decreasing order of the oxidation state of nitrogen in the following options:
Answer» Select the correct decreasing order of the oxidation state of nitrogen in the following options:

Discussion

2339.	A sol has positively charged colloidal particles. Which of the following solutions is required in lowest concentration for coagulation -
Answer» A sol has positively charged colloidal particles. Which of the following solutions is required in lowest concentration for coagulation -

Discussion

2340.	A solid has a BCC structure. If the distance of closest approach between the two atoms is 1.73 ∘A. The edge length of the cell is-(√3=1.73)
Answer» A solid has a BCC structure. If the distance of closest approach between the two atoms is $1.73 \circ A$ . The edge length of the cell is- ( $\sqrt{3} = 1.73$ )

Discussion

2341.	In the combustion of 2 g of methane, 25 kcal heat is liberated. Find the molar heat of combustion of methane.
Answer» In the combustion of $2 g$ of methane, $25 k c a l$ heat is liberated. Find the molar heat of combustion of methane.

Discussion

2342.	The vapour pressure of acetone at 20∘C is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20∘C, its vapour pressure was 183 torr. The molar mass (gmol−1) of the substance is:
Answer» The vapour pressure of acetone at $20^{\circ} C$ is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at $20^{\circ} C$ , its vapour pressure was 183 torr. The molar mass $(g m o l^{- 1})$ of the substance is:

Discussion

2343.	Which of the following elements represent highly electro positive as well as highly electro negative element in its period?
Answer» Which of the following elements represent highly electro positive as well as highly electro negative element in its period?

Discussion

2344.	A certain oxide of iodine has been found to contain iodine and oxygen. The ratio ioidine : oxygen is 254 : 112. On being dissoved in water this oxide can produce ?
Answer» A certain oxide of iodine has been found to contain iodine and oxygen. The ratio ioidine : oxygen is 254 : 112. On being dissoved in water this oxide can produce ?

Discussion

2345.	Which of the following carbocation is least stable
Answer» Which of the following carbocation is least stable

Discussion

2346.	D2O has maximum density at
Answer» $D_{2}$ O has maximum density at

Discussion

2347.	For the process to occur under adiabatic conditions, the correct condition is:
Answer» For the process to occur under adiabatic conditions, the correct condition is:

Discussion

2348.	Considering the elements Ca,Ge,Mg,Ga and K, the correct increasing order of their metallic character is:
Answer» Considering the elements $C a, G e, M g, G a$ and $K$ , the correct increasing order of their metallic character is:

Discussion

2349.	The vapour density of a mixture of NO2 and N2O4 at 27∘C is 38.3. How many moles of NO2 will be present in 500 g of the mixture?
Answer» The vapour density of a mixture of $N O_{2}$ and $N_{2} O_{4}$ at $27^{\circ} C$ is 38.3. How many moles of $N O_{2}$ will be present in $500 g$ of the mixture?

Discussion

2350.	Equal weights (1.00 g) of iron and sulphur are heated together and react to form FeS. What fraction of the original weight is left unreacted ? (Fe=56 g mol−1, S=32 g mol−1)
Answer» Equal weights (1.00 g) of iron and sulphur are heated together and react to form $F e S$ . What fraction of the original weight is left unreacted ? $(F e = 56 g m o l^{- 1}, S = 32 g m o l^{- 1})$

Discussion

Explore topic-wise InterviewSolutions in .

The gaseous reaction : A(g)+nB(g)⇌mC(g) is represented by the following curveswhat is the value of n+m

Which is the correct energy profile diagram for the following solvolysis reaction?

Urea reacts with hydrazine to give:

What are the conditions for an ideal solution?

Methyl alcohol can be distinguished from ethyl alcohol using [KCET 1984; BHU 2000]

If an element A shows two oxidation states +2 and +3. A forms oxides in such a way that they have a ratio 1 : 3 in a compound, the formula of the compound will be

The enolic form of ethyl acetoacetate as below has

Number of angular nodes in 3d_____

For the water gas reaction, C(s)+H2O(g)⇌CO(g)+H2(g)the standard Gibbs free energy of reaction (at 1000 K) is −8.1 kJ/mol. Calculate its equilibrium constantantilog 0.423=2.6485

Which among the following are isoelectronic NO−3,CO2−3,ClO−3,SO2

Calculate packing fraction from the following figure to two decimal places. Multiply it by 100 and enter the value.___

Energy of an electron is given by E=−2.178×10−18 J×Z2n2:Wavelength of light required to excite an electron in an hydrogen atom from level n=1 to n=2 will be (h=6.62×10−34 J s and c=3.0×108 m s−1 )

The principal products obtained on reaction of iodine with cold and dilute caustic soda solution are:

In the cell: Zn, Zn2+(aq) || H+(aq), H2(1 atm)Pt, during the working, the pH around cathode

H3PO4 is a tribasic acid and one of its salt is NaH2PO4. What volume of 1M NaOH solution should be added to 12 g ofNaH2PO4 to convert it intoNa3PO4?

Substances used in bringing down the temperature in high fevers are called [DPMT 1983]

Van der waals constant "b" of helium is 24 mL mol−1. Find molecular diameter of helium.

Which of the following is the fischer projection of the compound given below?

Which of thefollowing is the correct order of boiling points

Which of the following species are formed by Lewis acid-base interaction?

Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen?

What will be the volume of 0.1 M H2SO4​ solution required to neutralize 40 mL of 0.1 M KOH solution ?

What volume of oxygen gas (O2) measured at 0∘C and 1 atm is needed to burn 1 L of propane gas (C3H8) completely, measured under the same conditions?

The driving force for the completion of Claisen condensation between ethyl acetate and sodium ethoxide to ethyl acetoacetate is

Oxygen and nitrogen are present in a mixture in the ratio of 1:4. Calculate the ratio of their number of molecules in the mixture.

What will be the ratio of partial pressures of 10 moles of He and 5 moles of CH4 present in a reaction mixture?

The specific rate for a reaction increases by a factor of 4, if the temperature is changed from 27 ∘C to 52 ∘C. Find the activation energy for the reaction in kJ mol−1 (Take ln2=0.7, R (gas const) = 253 J/mol K) (Round off the answer upto two decimal places)

3000 J of heat is given to a gas at a constant pressure of P =(2×105 N/m2).If its volume increases by 10 litres during the process, find the change in the internal energy of the gas.

Which of the following will give a pair of enantiomers?

The pH of a solution containing 0.4 M HCO−3 and 0.2 M CO2−3 is:[Ka1(H2CO3)=4×10−7;Ka2(HCO−3)=4×10−11](Given, log 4=0.60, log 0.5=−0.3)

In the given reaction: CH2=CH−CHO→ CH2=CH−CH2OH in the presence of X, what will be X:

Which of the following is not related to the metallurgy of Zinc?

Suggest the reagents for the following conversion.

What is the ratio of the empirical formula mass to the molecular formula mass of benzene?

Decomposition of H2O2 is a

If the boiling point of an aqueous solution containing a non-volatile solute is 100.15∘C. What is its freezing point? Given latent heat of fusion and vapourization of water 80calg−1 and 540calg−1, respectively.

Which of the following configurations will have the least electron affinity?

Select the correct decreasing order of the oxidation state of nitrogen in the following options:

A sol has positively charged colloidal particles. Which of the following solutions is required in lowest concentration for coagulation -

A solid has a BCC structure. If the distance of closest approach between the two atoms is 1.73 ∘A. The edge length of the cell is-(√3=1.73)

In the combustion of 2 g of methane, 25 kcal heat is liberated. Find the molar heat of combustion of methane.

The vapour pressure of acetone at 20∘C is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20∘C, its vapour pressure was 183 torr. The molar mass (gmol−1) of the substance is:

Which of the following elements represent highly electro positive as well as highly electro negative element in its period?

A certain oxide of iodine has been found to contain iodine and oxygen. The ratio ioidine : oxygen is 254 : 112. On being dissoved in water this oxide can produce ?

Which of the following carbocation is least stable

D2O has maximum density at

For the process to occur under adiabatic conditions, the correct condition is:

Considering the elements Ca,Ge,Mg,Ga and K, the correct increasing order of their metallic character is:

The vapour density of a mixture of NO2 and N2O4 at 27∘C is 38.3. How many moles of NO2 will be present in 500 g of the mixture?

Equal weights (1.00 g) of iron and sulphur are heated together and react to form FeS. What fraction of the original weight is left unreacted ? (Fe=56 g mol−1, S=32 g mol−1)

What will be the volume of 0.1 M H2SO4 solution required to neutralize 40 mL of 0.1 M KOH solution ?