2600 + Interview Questions in Chemistry Page 16 InterviewSolution

751.	The stability of the allyl carbocation can be explained by:
Answer» The stability of the allyl carbocation can be explained by:

Discussion

752.	The most stable keto isomer of the following compound
Answer» The most stable keto isomer of the following compound

Discussion

753.	When an electron makes a transtion from its n+1 state to the nth state, the frequency of the emitted radiations is related to n according to (where n>>1):
Answer» When an electron makes a transtion from its $n + 1$ state to the $n t h$ state, the frequency of the emitted radiations is related to $n$ according to (where $n >> 1)$ :

Discussion

754.	Ethylene oxide when treated with Grignard reagent yields: alcoholPrimary alcoholSecondary alcoholTertiary alcoholCyclopropyl alcohol
Answer» Ethylene oxide when treated with Grignard reagent yields: alcohol Primary alcohol Secondary alcohol Tertiary alcohol Cyclopropyl alcohol

754.

Ethylene oxide when treated with Grignard reagent yields: alcoholPrimary alcoholSecondary alcoholTertiary alcoholCyclopropyl alcohol

Answer»

Ethylene oxide when treated with Grignard reagent yields: alcohol

Primary alcohol
Secondary alcohol
Tertiary alcohol
Cyclopropyl alcohol

Discussion

755.	If t is the time required for a radioactive substance to reduce to one third of its initial amount, what fraction would be left over after0.5 t
Answer» If t is the time required for a radioactive substance to reduce to one third of its initial amount, what fraction would be left over after0.5 t

Discussion

756.	For a solution of volatile liquids the partial vapour pressure of each component in solution is directly proportional to
Answer» For a solution of volatile liquids the partial vapour pressure of each component in solution is directly proportional to

Discussion

757.	The state in which 99% matter of the Universe exists is
Answer» The state in which $99 %$ matter of the Universe exists is

Discussion

758.	The spectral line of the shortest wavelength in Balmer series of atomic hydrogen will be:
Answer» The spectral line of the shortest wavelength in Balmer series of atomic hydrogen will be:

Discussion

759.	For which of the following set of quantum numbers will an electron have the highest energy?
Answer» For which of the following set of quantum numbers will an electron have the highest energy?

Discussion

760.	The strength of a 10−2 M Na2CO3 solution in terms of its molality will be: (density of solution=1.10 g mL−1,molecular weight of Na2CO3=106 g mol−1)
Answer» The strength of a $10^{- 2} M N a_{2} C O_{3}$ solution in terms of its molality will be: $(density of solution = 1.10 {g mL}^{- 1}$ , $molecular weight of N a_{2} C O_{3} = 106 {g mol}^{- 1})$

Discussion

761.	How many aromatic amines can be represented by the molecular formula C7H9N ?
Answer» How many aromatic amines can be represented by the molecular formula C₇H₉N ?

Discussion

762.	Two elements A & B of 3rd and 4th periods are such that B. E. of A-A, B-B & A-B are 81 eV, 63 eV and 76 eV respectively. The electronegativity of B is 2.4. What will be the electronegativity of 'A' approximately?
Answer» Two elements A & B of $3^{r d}$ and $4^{t h}$ periods are such that B. E. of A-A, B-B & A-B are $81 e V$ , $63 e V$ and $76 e V$ respectively. The electronegativity of B is 2.4. What will be the electronegativity of 'A' approximately?

Discussion

763.	What is the concentration of CO2−3 in a 0.1 M Na2CO3 solution after the hydrolysis reactions have come to an equilibrium? (Ka(HCO−3)=4.7×10−11)
Answer» What is the concentration of $C O_{3}^{2 -}$ in a $0.1 M N a_{2} C O_{3}$ solution after the hydrolysis reactions have come to an equilibrium? ( $K_{a} (H C O_{3}^{-}) = 4.7 \times 10^{- 11}$ )

Discussion

764.	The molarity of 0.006 mole of NaCl in 100ml solution is:
Answer» The molarity of 0.006 mole of NaCl in 100ml solution is:

Discussion

765.	The given unbalanced redox reactionS2O2−3+Sb2O5+H+→SbO+H2SO3is balanced by oxidation number method. The stoichiometric coefficient of Sb2O5 and SbO respectively, will be:
Answer» The given unbalanced redox reaction $S_{2} O_{3}^{2 -} + S b_{2} O_{5} + H^{+} \to S b O + H_{2} S O_{3}$ is balanced by oxidation number method. The stoichiometric coefficient of $S b_{2} O_{5}$ and $S b O$ respectively, will be:

Discussion

766.	Which one of the following cannot act as a ligand?
Answer» Which one of the following cannot act as a ligand?

Discussion

767.	The standard units of conductivity or specific conductance [k] is Where S = Siemenscm = centimeter
Answer» The standard units of conductivity or specific conductance [k] is Where S = Siemens cm = centimeter

Discussion

768.	What volume of CO2 (measured at STP) is obtained on heating 10 grams of 90% pure limestone?
Answer» What volume of $C O_{2}$ (measured at STP) is obtained on heating 10 grams of 90% pure limestone?

Discussion

769.	Arrange the following in increasing order of their size: Be, Ca, Ba, Sr.
Answer» Arrange the following in increasing order of their size: Be, Ca, Ba, Sr.

Discussion

770.	A container containing ammonia is allowed to decompose and the following equilibrium is established.2NH3(g)⇌N2(g)+3H2(g). Then, the equilibrium constant, Kp is expressed as:(Where pN2 = partial pressure of N2 and pNH3 is the partial pressure of NH3 )
Answer» A container containing ammonia is allowed to decompose and the following equilibrium is established. $2 N H_{3} (g) ⇌ N_{2} (g) + 3 H_{2} (g)$ . Then, the equilibrium constant, $K_{p}$ is expressed as: (Where $p_{N_{2}}$ = partial pressure of $N_{2}$ and $p_{N H_{3}}$ is the partial pressure of $N H_{3}$ )

Discussion

771.	Magnetic moment 2.84 B.M. is given by (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)
Answer» Magnetic moment 2.84 B.M. is given by (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)

Discussion

772.	The substance which relieve anxiety, reduce mental tension and induce sleep are called
Answer» The substance which relieve anxiety, reduce mental tension and induce sleep are called

Discussion

773.	Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in solution
Answer» Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in solution

Discussion

774.	The correct structure of XeF4 is:
Answer» The correct structure of $X e F_{4}$ is:

Discussion

775.	Most reducing agent is
Answer» Most reducing agent is

775.

Most reducing agent is

Answer»

Most reducing agent is

Discussion

776.	Which of the following is the strongest oxidising agent
Answer» Which of the following is the strongest oxidising agent

776.

Which of the following is the strongest oxidising agent

Answer»

Which of the following is the strongest oxidising agent

Discussion

777.	Which of the following compounds is used as a general inhalation anaesthetic ?
Answer» Which of the following compounds is used as a general inhalation anaesthetic ?

Discussion

778.	What would be the stoichiometric coefficient of P and HNO3 respectively, in the net balanced equation for the given redox reaction: P+HNO3→HPO3+NO+H2O
Answer» What would be the stoichiometric coefficient of $P$ and $H N O_{3}$ respectively, in the net balanced equation for the given redox reaction: $P + H N O_{3} \to H P O_{3} + N O + H_{2} O$

Discussion

779.	Which of the following dihedral angle is not possible in skew conformation?
Answer» Which of the following dihedral angle is not possible in skew conformation?

Discussion

780.	1 mole of He gas has 6.022×10x atoms. x is _____
Answer» 1 mole of He gas has 6.022 $\times$ 10x atoms. x is _____

Discussion

781.	In a crystal, the atoms are located at the positions where potential energy is
Answer» In a crystal, the atoms are located at the positions where potential energy is

Discussion

782.	In which of the following arrangements a metal could have least density?
Answer» In which of the following arrangements a metal could have least density?

Discussion

783.	0.1 mol of methyl amine (Kb = 5 × 10−4) is mixed with 0.08 mol of HCl and the solution is diluted to 1 litre. The hydrogen ion concentration of the resulting solution is:
Answer» $0.1 m o l$ of methyl amine ( $K_{b}$ = $5 \times 10^{- 4}$ ) is mixed with $0.08 m o l$ of $H C l$ and the solution is diluted to $1 l i t r e$ . The hydrogen ion concentration of the resulting solution is:

Discussion

784.	The correct order of density of alkali metals is:
Answer» The correct order of density of alkali metals is:

Discussion

785.	Consider a redox reaction: FeS2+KMnO4+H+→Fe3++SO2−4+Mn2++H2O.If the molar mass of FeS2 is M, then equivalent mass of FeS2 would be equal to:
Answer» Consider a redox reaction: $F e S_{2} + K M n O_{4} + H^{+} \to F e^{3 +} + S O_{4}^{2 -} + M n^{2 +} + H_{2} O$ . If the molar mass of $F e S_{2}$ is M, then equivalent mass of $F e S_{2}$ would be equal to:

Discussion

786.	Which of the following statements is correct for a strong electrolyte :
Answer» Which of the following statements is correct for a strong electrolyte :

Discussion

787.	Ethylene may be obtained by dehydration of which of the following with concentratedH2SO4 at 160−1700C
Answer» Ethylene may be obtained by dehydration of which of the following with concentrated $H_{2} S O_{4} a t 160 - 170^{0} C$

Discussion

788.	What is the molarity of a barium hydroxide solution if 15.48 mL of it is required to neutralize 25 mL of a 0.3096 M HCl solution?
Answer» What is the molarity of a barium hydroxide solution if $15.48 mL$ of it is required to neutralize $25 mL$ of a $0.3096 M H C l$ solution?

Discussion

789.	50 ml of 1M oxalic acid is shaken with 0.5 g of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram charcoal.
Answer» 50 ml of 1M oxalic acid is shaken with 0.5 g of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram charcoal.

Discussion

790.	In the reaction A++ B→A+B+, there is no entropy change. If enthalpy change is 22kJ/mol, calculate △G for the reaction.
Answer» In the reaction $A^{+} + B \to A + B^{+},$ there is no entropy change. If enthalpy change is $22 k J / m o l$ , calculate $△ G$ for the reaction.

Discussion

791.	The enthalpy change for the reaction,C2H4(g) + 3O2(g) ⟶2CO2(g) + 2H2O(g) is called:
Answer» The enthalpy change for the reaction, $C_{2} H_{4} (g) + 3 O_{2} (g) ⟶ 2 C O_{2} (g) + 2 H_{2} O (g)$ is called:

Discussion

792.	Which of the following is/are correct ?i) lyophobic sols are less stableii) lyophilic sols are reversibleiii) lyophobic sols are coagulated by adding electrolytesiv) lyophobic sols are more hydrated
Answer» Which of the following is/are correct ? i) lyophobic sols are less stable ii) lyophilic sols are reversible iii) lyophobic sols are coagulated by adding electrolytes iv) lyophobic sols are more hydrated

Discussion

793.	What is the sum of translational and rotational energy of 1 mole of oxygen at 300 K ?R=8.314 J mol−1 K−1
Answer» What is the sum of translational and rotational energy of 1 mole of oxygen at $300 K$ ? $R = 8.314 {J mol}^{- 1} K^{- 1}$

Discussion

794.	50 ml of hydrogen difuses out through a small hole from a vessel in 20 minutes.The time needed for 40 ml of oxygen to diffuse out is ___.
Answer» 50 ml of hydrogen difuses out through a small hole from a vessel in 20 minutes.The time needed for 40 ml of oxygen to diffuse out is ___.

Discussion

795.	Identify the correct order of acidic strengths of CO2,CuO,CaO and H2O
Answer» Identify the correct order of acidic strengths of $C O_{2}, C u O, C a O and H_{2} O$

Discussion

796.	What happens in the following reaction?
Answer» What happens in the following reaction?

Discussion

797.	The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyte solid weighing 0.5 g when added to 39.0 g of benzene (molar mass 78gmol−1). The vapour pressure of the solution then is 0.845 bar. What is the molar mass of the solid substance?
Answer» The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyte solid weighing 0.5 g when added to 39.0 g of benzene (molar mass $78 g m o l^{- 1})$ . The vapour pressure of the solution then is 0.845 bar. What is the molar mass of the solid substance?

Discussion

798.	Packing fraction is minimum in which of the following?
Answer» Packing fraction is minimum in which of the following?

Discussion

799.	The compressibility of a gas is less than unity at STP. Therefore, its molar volume is
Answer» The compressibility of a gas is less than unity at STP. Therefore, its molar volume is

Discussion

800.	The polymer of natural rubber is:
Answer» The polymer of natural rubber is:

Discussion

Explore topic-wise InterviewSolutions in .

The stability of the allyl carbocation can be explained by:

The most stable keto isomer of the following compound

When an electron makes a transtion from its n+1 state to the nth state, the frequency of the emitted radiations is related to n according to (where n&gt;&gt;1):

Ethylene oxide when treated with Grignard reagent yields: alcoholPrimary alcoholSecondary alcoholTertiary alcoholCyclopropyl alcohol

If t is the time required for a radioactive substance to reduce to one third of its initial amount, what fraction would be left over after0.5 t

For a solution of volatile liquids the partial vapour pressure of each component in solution is directly proportional to

The state in which 99% matter of the Universe exists is

The spectral line of the shortest wavelength in Balmer series of atomic hydrogen will be:

For which of the following set of quantum numbers will an electron have the highest energy?

The strength of a 10−2 M Na2CO3 solution in terms of its molality will be: (density of solution=1.10 g mL−1,molecular weight of Na2CO3=106 g mol−1)

How many aromatic amines can be represented by the molecular formula C7H9N ?

Two elements A & B of 3rd and 4th periods are such that B. E. of A-A, B-B & A-B are 81 eV, 63 eV and 76 eV respectively. The electronegativity of B is 2.4. What will be the electronegativity of 'A' approximately?

What is the concentration of CO2−3 in a 0.1 M Na2CO3 solution after the hydrolysis reactions have come to an equilibrium? (Ka(HCO−3)=4.7×10−11)

The molarity of 0.006 mole of NaCl in 100ml solution is:

The given unbalanced redox reactionS2O2−3+Sb2O5+H+→SbO+H2SO3is balanced by oxidation number method. The stoichiometric coefficient of Sb2O5 and SbO respectively, will be:

Which one of the following cannot act as a ligand?

The standard units of conductivity or specific conductance [k] is Where S = Siemenscm = centimeter

What volume of CO2 (measured at STP) is obtained on heating 10 grams of 90% pure limestone?

Arrange the following in increasing order of their size: Be, Ca, Ba, Sr.

A container containing ammonia is allowed to decompose and the following equilibrium is established.2NH3(g)⇌N2(g)+3H2(g). Then, the equilibrium constant, Kp is expressed as:(Where pN2 = partial pressure of N2 and pNH3 is the partial pressure of NH3 )

Magnetic moment 2.84 B.M. is given by (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)

The substance which relieve anxiety, reduce mental tension and induce sleep are called

Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in solution

The correct structure of XeF4 is:

Most reducing agent is

Which of the following is the strongest oxidising agent

Which of the following compounds is used as a general inhalation anaesthetic ?

What would be the stoichiometric coefficient of P and HNO3 respectively, in the net balanced equation for the given redox reaction: P+HNO3→HPO3+NO+H2O

Which of the following dihedral angle is not possible in skew conformation?

1 mole of He gas has 6.022×10x atoms. x is _____

In a crystal, the atoms are located at the positions where potential energy is

In which of the following arrangements a metal could have least density?

0.1 mol of methyl amine (Kb = 5 × 10−4) is mixed with 0.08 mol of HCl and the solution is diluted to 1 litre. The hydrogen ion concentration of the resulting solution is:

The correct order of density of alkali metals is:

Consider a redox reaction: FeS2+KMnO4+H+→Fe3++SO2−4+Mn2++H2O.If the molar mass of FeS2 is M, then equivalent mass of FeS2 would be equal to:

Which of the following statements is correct for a strong electrolyte :

Ethylene may be obtained by dehydration of which of the following with concentratedH2SO4 at 160−1700C

What is the molarity of a barium hydroxide solution if 15.48 mL of it is required to neutralize 25 mL of a 0.3096 M HCl solution?

50 ml of 1M oxalic acid is shaken with 0.5 g of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram charcoal.

In the reaction A++ B→A+B+, there is no entropy change. If enthalpy change is 22kJ/mol, calculate △G for the reaction.

The enthalpy change for the reaction,C2H4(g) + 3O2(g) ⟶2CO2(g) + 2H2O(g) is called:

Which of the following is/are correct ?i) lyophobic sols are less stableii) lyophilic sols are reversibleiii) lyophobic sols are coagulated by adding electrolytesiv) lyophobic sols are more hydrated

What is the sum of translational and rotational energy of 1 mole of oxygen at 300 K ?R=8.314 J mol−1 K−1

50 ml of hydrogen difuses out through a small hole from a vessel in 20 minutes.The time needed for 40 ml of oxygen to diffuse out is ___.

Identify the correct order of acidic strengths of CO2,CuO,CaO and H2O

What happens in the following reaction?

The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyte solid weighing 0.5 g when added to 39.0 g of benzene (molar mass 78gmol−1). The vapour pressure of the solution then is 0.845 bar. What is the molar mass of the solid substance?

Packing fraction is minimum in which of the following?

The compressibility of a gas is less than unity at STP. Therefore, its molar volume is

The polymer of natural rubber is:

When an electron makes a transtion from its n+1 state to the nth state, the frequency of the emitted radiations is related to n according to (where n>>1):