46295 + Interview Questions in Chemistry Page 14 InterviewSolution

651.	On heating which of the following releases CO2 most easily?
Answer» On heating which of the following releases $C O_{2}$ most easily?

Discussion

652.	Why is anhydrous CaCl2 used in a desiccator? Name one substance that is 'efflorescent'.
Answer» Why is anhydrous $C a C l_{2}$ used in a desiccator? Name one substance that is 'efflorescent'.

Discussion

653.	The option(s) with only amphoteric oxides is (are)
Answer» The option(s) with only amphoteric oxides is (are)

Discussion

654.	What is the coulombs formula?
Answer» What is the coulombs formula?

Discussion

655.	x% (w/v) aqueous solution of HCHO and y% (w/v) aqueous solution of glucose are isotonic with each other. The ratio x:y will be:
Answer» $x % (w / v)$ aqueous solution of $H C H O$ and $y % (w / v)$ aqueous solution of glucose are isotonic with each other. The ratio $x : y$ will be:

Discussion

656.	60 What is the role of covalent bonding in melting point and boiling point?
Answer» 60 What is the role of covalent bonding in melting point and boiling point?

Discussion

657.	11. What is formula to find maimum no of symmetric relation on set A where n(A)=n.
Answer» 11. What is formula to find maimum no of symmetric relation on set A where n(A)=n.

Discussion

658.	Which of the following graphs represents Boyle's law?
Answer» Which of the following graphs represents Boyle's law?

Discussion

659.	a sample of pure calcium weighting 1.35 g was quantitatively converted to 1.86 g of pure CaO.atomic mass of calcium i
Answer» a sample of pure calcium weighting 1.35 g was quantitatively converted to 1.86 g of pure CaO.atomic mass of calcium i

Discussion

660.	The formation of cyanohydrins from a ketone is an example of
Answer» The formation of cyanohydrins from a ketone is an example of

Discussion

661.	What volume of 0.10M H2SO4 must be added to 50 ml of a 0.10M NaOH solution to make a solution in which the molarity of the H2SO4 is 0.050M?
Answer» What volume of 0.10M H2SO4 must be added to 50 ml of a 0.10M NaOH solution to make a solution in which the molarity of the H2SO4 is 0.050M?

Discussion

662.	A student soaked 5 g of raisins in beaker (A) containing 25 mL of ice-chilled water and another 5 g of raisins in beaker (B) containing 25 mL of tap water at room temperature. After one hour the student observed that:(1) water absorbed by raisins in beaker (A) was more than that absorbed by raisins of beaker (B).(2) water absorbed by raisins in beaker (B) was more than that absorbed by raisins of beaker (A).(3) the amount of water absorbed by the raisins of both beakers (A) and (B) was equal.(4) no water was absorbed by raisins in either of the beakers (A) and (B).
Answer» A student soaked 5 g of raisins in beaker (A) containing 25 mL of ice-chilled water and another 5 g of raisins in beaker (B) containing 25 mL of tap water at room temperature. After one hour the student observed that: (1) water absorbed by raisins in beaker (A) was more than that absorbed by raisins of beaker (B). (2) water absorbed by raisins in beaker (B) was more than that absorbed by raisins of beaker (A). (3) the amount of water absorbed by the raisins of both beakers (A) and (B) was equal. (4) no water was absorbed by raisins in either of the beakers (A) and (B).

Discussion

663.	Purines are
Answer» Purines are

Discussion

664.	Ionization potential and electron affinity of fluorine are 17.42 and 3.412 eV respectively. The electronegativity of fluorine on Mulliken scale and Pauling scale is x and y respectively, then (x+y)0.4 is:
Answer» Ionization potential and electron affinity of fluorine are $17.42$ and $3.412 e V$ respectively. The electronegativity of fluorine on Mulliken scale and Pauling scale is $x$ and $y$ respectively, then $\frac{(x + y)}{0.4}$ is:

Discussion

665.	How to find major product in products if one is orthO and other is para??Need full explanation.
Answer» How to find major product in products if one is orthO and other is para?? Need full explanation.

Discussion

666.	Explain why fluorine forms only one oxoacid, HOF.
Answer» Explain why fluorine forms only one oxoacid, HOF.

Discussion

667.	1∘, 2∘, 3∘ and 4∘ carbon atoms are present in?
Answer» $1^{\circ}, 2^{\circ}, 3^{\circ} a n d 4^{\circ}$ carbon atoms are present in?

Discussion

668.	10 ml of the gaseous mixture of CO, H2 andNH3, are completely oxidised by 8 ml O2. If theoriginal mixture of CO, H2 and NH3 containsequal volumes of CO and H2, then what is thevolume % of NH, in the original mixture ?(1) 10% (2) 20% (3) 40% (4) 60%
Answer» 10 ml of the gaseous mixture of CO, H2 andNH3, are completely oxidised by 8 ml O2. If theoriginal mixture of CO, H2 and NH3 containsequal volumes of CO and H2, then what is thevolume % of NH, in the original mixture ?(1) 10% (2) 20% (3) 40% (4) 60%

Discussion

669.	which electrolytes are completely ionised and which are not completely ionized?
Answer» which electrolytes are completely ionised and which are not completely ionized?

Discussion

670.	The freezing point of a solution containing 4.8 g of a compound in 60 g of benzene is 4.48∘C. What is the molar mass of the compound?Given Kf for benzene =5.1 K m−1and freezing point of pure benzene is 5.5∘C
Answer» The freezing point of a solution containing $4.8 g$ of a compound in $60 g$ of benzene is ${4.48}^{\circ} C$ . What is the molar mass of the compound? Given $K_{f} for benzene = 5.1 K m^{- 1}$ and freezing point of pure benzene is ${5.5}^{\circ} C$

Discussion

671.	Which of the following statements are incorrect about penicillin? (a) An antibacterial fungus (b) Arnpicillin is its synthetic modification (c) It has bacteriostatic effect (d) It is a broad spectrum antibiotic
Answer» Which of the following statements are incorrect about penicillin? (a) An antibacterial fungus (b) Arnpicillin is its synthetic modification (c) It has bacteriostatic effect (d) It is a broad spectrum antibiotic

Discussion

672.	Why 5 R principle came into existence ? What does it say
Answer» Why 5 R principle came into existence ? What does it say

Discussion

673.	Which of the following is phenolic [J & K 2005]
Answer» Which of the following is phenolic [J & K 2005]

Discussion

674.	What type of defect can arise when a solid is heated?
Answer» What type of defect can arise when a solid is heated?

Discussion

675.	is it correct to say that primary alcohols, secondary alcohols, aldehydes and ketones are capable of performing haloform reaction
Answer» is it correct to say that primary alcohols, secondary alcohols, aldehydes and ketones are capable of performing haloform reaction

Discussion

676.	A solution containing 1 mol per litre of each Cu(NO3)2,AgNO3, and Hg2(NO3)2 is being electrolyzed by using inert electrodes. The values of standard electrode potentials in volts (reduction potential) are Ag\|Ag⨁=+0.80,2Hg\|Hg2+2=+0.79Cu\|Cu2+=+0.34,Mg\|Mg2+=−2.37with increasing voltage, the sequence of deposition of metals at the cathode will be (IIT-JEE, 1984)
Answer» A solution containing 1 mol per litre of each $C u (N O_{3})_{2}, A g N O_{3},$ and $H g_{2} (N O_{3})_{2}$ is being electrolyzed by using inert electrodes. The values of standard electrode potentials in volts (reduction potential) are $A g \| A g^{⨁} = + 0.80, 2 H g \| H g_{2}^{2 +} = + 0.79$ $C u \| C u^{2 +} = + 0.34, M g \| M g^{2 +} = - 2.37$ with increasing voltage, the sequence of deposition of metals at the cathode will be (IIT-JEE, 1984)

Discussion

677.	The pH of a solution obtained by mixing 100 ml of 0.2 M CH3COOH With 100 ml of 0.2 M NaOH will be (pKa for CH3COOH =4.74 and log 2 =0.3010) 4.74 8.87 9.10 8.57
Answer» The pH of a solution obtained by mixing 100 ml of 0.2 M CH3COOH With 100 ml of 0.2 M NaOH will be (pKa for CH3COOH =4.74 and log 2 =0.3010) 4.74 8.87 9.10 8.57

Discussion

678.	The dissociation constant of a base MOH is 5.5×10−6, then calculate the dissociation constant of its conjugate acid.
Answer» The dissociation constant of a base $M O H$ is $5.5 \times 10^{- 6}$ , then calculate the dissociation constant of its conjugate acid.

Discussion

679.	The number of orbitals associated with quantum numbers n=5, ms=+12 is:
Answer» The number of orbitals associated with quantum numbers $n = 5, m_{s} = + \frac{1}{2}$ is:

Discussion

680.	An aqueous solution of glucose (C6H12O6) is labelled as 10% w/V. Calculate the volume in which 1 mole of glucose will be dissolved.
Answer» An aqueous solution of glucose $(C_{6} H_{12} O_{6})$ is labelled as $10 % w/V$ . Calculate the volume in which $1$ mole of glucose will be dissolved.

Discussion

681.	3. The rate constant of a reaction is 1.5× 10^7s^{-1}at50^° C and 4.5 x 10^7 s^- at 100^° C. What is thevalue of activation energy?(1) 2.2 x 103 J mol-1(2) 2300 J mol-1(3) 2.2 x 104 J mol-1(4) 220 J mol-1Ea
Answer» 3. The rate constant of a reaction is 1.5× 10^7s^{-1}at50^° C and 4.5 x 10^7 s^- at 100^° C. What is thevalue of activation energy?(1) 2.2 x 103 J mol-1(2) 2300 J mol-1(3) 2.2 x 104 J mol-1(4) 220 J mol-1Ea

Discussion

682.	When NaCl is doped with 1.0×10−3 mole of SrCl2, the number of cation vacancy is ?
Answer» When $N a C l$ is doped with $1.0 \times 10^{- 3}$ mole of $S r C l_{2}$ , the number of cation vacancy is ?

Discussion

683.	What is RANK of end centered cube
Answer» What is RANK of end centered cube

Discussion

684.	Which organic compound among the following is not an isomer of CH3−CO−CH2CH2CH2CH3?
Answer» Which organic compound among the following is not an isomer of $C H_{3} - C O - C H_{2} C H_{2} C H_{2} C H_{3}$ ?

Discussion

685.	Which one of the following does not describe Nitrogen?
Answer» Which one of the following does not describe Nitrogen?

Discussion

686.	assertion Magnetic moment of DY is highest among lanthankids reason orbital motion contributes magnetic momnet
Answer» assertion Magnetic moment of DY is highest among lanthankids reason orbital motion contributes magnetic momnet

Discussion

687.	in which of the following, energy is realeased?a) Na(s) -Na+(g)b)cl2(g)-2Cl-(g)c)Na+ + Cl- -NaCl(s)d) NaCl(S) - Na+ + Cl-
Answer» in which of the following, energy is realeased? a) Na(s) -Na+(g) b)cl2(g)-2Cl-(g) c)Na+ + Cl- -NaCl(s) d) NaCl(S) - Na+ + Cl-

Discussion

688.	The concentration of \lbrack H^+\rbrack and concentration of \lbrack OH^-\rbrack of a 0.1 M aqueous solution of 2% ionised weak acid is ionic product of water=10^{-14})
Answer» The concentration of \lbrack H^+\rbrack and concentration of \lbrack OH^-\rbrack of a 0.1 M aqueous solution of 2% ionised weak acid is ionic product of water=10^{-14})

Discussion

689.	How many oxygen molecules are present in 44gm of carbon dioxide?
Answer» How many oxygen molecules are present in 44gm of carbon dioxide?

Discussion

690.	Statement: The reuse strategy is better than recycling.This statement is __
Answer» Statement: The reuse strategy is better than recycling. This statement is __

Discussion

691.	What is molality?
Answer» What is molality?

Discussion

692.	The xcitation eneray of fist excited state of a hydrogen like atom is 40.8 eV. Find the energy nesegto remove the electron to form the ion.
Answer» The xcitation eneray of fist excited state of a hydrogen like atom is 40.8 eV. Find the energy nesegto remove the electron to form the ion.

Discussion

693.	The enthalpy of formation of ethane, ethylene and benzene from the gaseous atom are -2839.2,-2275.2and -5506 kJ mol respectively. Calculate the resonance energy of benzene. The bond enthalpy ofC-H bond is given as equal to +410.87 kd/mol.
Answer» The enthalpy of formation of ethane, ethylene and benzene from the gaseous atom are -2839.2,-2275.2and -5506 kJ mol respectively. Calculate the resonance energy of benzene. The bond enthalpy ofC-H bond is given as equal to +410.87 kd/mol.

Discussion

694.	Calculate △G⊖ for the following reaction: CO(g)+12O2(g)→CO2(g); △H⊖ = -282.84 kJ Given, S⊖Co2=213.8J K−1mol−1, S⊖CO(g) = 197.9 J K−1mol−1, S⊖Co2=205.0J K−1mol−1
Answer» Calculate $△ G^{⊖}$ for the following reaction: $C O (g) + \frac{1}{2} O_{2} (g) \to C O_{2} (g)$ ; $△ H^{⊖}$ = -282.84 kJ Given, $S^{⊖} C o_{2} = 213.8 J$ $K^{- 1} m o l^{- 1}$ , $S^{⊖} C O (g)$ = 197.9 J $K^{- 1} m o l^{- 1}$ , $S^{⊖} C o_{2} = 205.0 J$ $K^{- 1} m o l^{- 1}$

Discussion

695.	In which process work acts as a state function :- (1) Isobaric process (2) Isochoric process (3) Adiabatic process (4) Both (1) & (2)
Answer» In which process work acts as a state function :- (1) Isobaric process (2) Isochoric process (3) Adiabatic process (4) Both (1) & (2)

Discussion

696.	Identify A and B:
Answer» Identify A and B:

Discussion

697.	Calculatethe number of unpaired electrons in the following gaseous ions: Mn3+,Cr3+,V3+and Ti3+.Which one of these is the most stable in aqueous solution?
Answer» Calculate the number of unpaired electrons in the following gaseous ions: Mn³⁺, Cr³⁺, V³⁺ and Ti³⁺. Which one of these is the most stable in aqueous solution?

Discussion

698.	Cellulose acetate is a
Answer» Cellulose acetate is a

Discussion

699.	A reaction is first order in A and second order in B: Write the differential rate equation. How is the rate affected on increasing the concentration of B three times? How is the rate affected when the concentrations of both A and B are doubled?
Answer» A reaction is first order in A and second order in B: Write the differential rate equation. How is the rate affected on increasing the concentration of B three times? How is the rate affected when the concentrations of both A and B are doubled?

699.

A reaction is first order in A and second order in B: Write the differential rate equation. How is the rate affected on increasing the concentration of B three times? How is the rate affected when the concentrations of both A and B are doubled?

Answer»

A reaction is first order in A and second order in B:

Write the differential rate equation.

How is the rate affected on increasing the concentration of B three times?

How is the rate affected when the concentrations of both A and B are doubled?

Discussion

700.	how there are 8 lobes in dz^2 orbital?
Answer» how there are 8 lobes in dz^2 orbital?

Discussion

Explore topic-wise InterviewSolutions in .

On heating which of the following releases CO2 most easily?

Why is anhydrous CaCl2 used in a desiccator? Name one substance that is 'efflorescent'.

The option(s) with only amphoteric oxides is (are)

What is the coulombs formula?

x% (w/v) aqueous solution of HCHO and y% (w/v) aqueous solution of glucose are isotonic with each other. The ratio x:y will be:

60 What is the role of covalent bonding in melting point and boiling point?

11. What is formula to find maimum no of symmetric relation on set A where n(A)=n.

Which of the following graphs represents Boyle's law?

a sample of pure calcium weighting 1.35 g was quantitatively converted to 1.86 g of pure CaO.atomic mass of calcium i

The formation of cyanohydrins from a ketone is an example of

What volume of 0.10M H2SO4 must be added to 50 ml of a 0.10M NaOH solution to make a solution in which the molarity of the H2SO4 is 0.050M?

Purines are

Ionization potential and electron affinity of fluorine are 17.42 and 3.412 eV respectively. The electronegativity of fluorine on Mulliken scale and Pauling scale is x and y respectively, then (x+y)0.4 is:

How to find major product in products if one is orthO and other is para??Need full explanation.

Explain why fluorine forms only one oxoacid, HOF.

1∘, 2∘, 3∘ and 4∘ carbon atoms are present in?

10 ml of the gaseous mixture of CO, H2 andNH3, are completely oxidised by 8 ml O2. If theoriginal mixture of CO, H2 and NH3 containsequal volumes of CO and H2, then what is thevolume % of NH, in the original mixture ?(1) 10% (2) 20% (3) 40% (4) 60%

which electrolytes are completely ionised and which are not completely ionized?

The freezing point of a solution containing 4.8 g of a compound in 60 g of benzene is 4.48∘C. What is the molar mass of the compound?Given Kf for benzene =5.1 K m−1and freezing point of pure benzene is 5.5∘C

Which of the following statements are incorrect about penicillin? (a) An antibacterial fungus (b) Arnpicillin is its synthetic modification (c) It has bacteriostatic effect (d) It is a broad spectrum antibiotic

Why 5 R principle came into existence ? What does it say

Which of the following is phenolic [J &amp; K 2005]

What type of defect can arise when a solid is heated?

is it correct to say that primary alcohols, secondary alcohols, aldehydes and ketones are capable of performing haloform reaction

The pH of a solution obtained by mixing 100 ml of 0.2 M CH3COOH With 100 ml of 0.2 M NaOH will be (pKa for CH3COOH =4.74 and log 2 =0.3010) 4.74 8.87 9.10 8.57

The dissociation constant of a base MOH is 5.5×10−6, then calculate the dissociation constant of its conjugate acid.

The number of orbitals associated with quantum numbers n=5, ms=+12 is:

An aqueous solution of glucose (C6H12O6) is labelled as 10% w/V. Calculate the volume in which 1 mole of glucose will be dissolved.

3. The rate constant of a reaction is 1.5× 10^7s^{-1}at50^° C and 4.5 x 10^7 s^- at 100^° C. What is thevalue of activation energy?(1) 2.2 x 103 J mol-1(2) 2300 J mol-1(3) 2.2 x 104 J mol-1(4) 220 J mol-1Ea

When NaCl is doped with 1.0×10−3 mole of SrCl2, the number of cation vacancy is ?

What is RANK of end centered cube

Which organic compound among the following is not an isomer of CH3−CO−CH2CH2CH2CH3?

Which one of the following does not describe Nitrogen?

assertion Magnetic moment of DY is highest among lanthankids reason orbital motion contributes magnetic momnet

in which of the following, energy is realeased?a) Na(s) -Na+(g)b)cl2(g)-2Cl-(g)c)Na+ + Cl- -NaCl(s)d) NaCl(S) - Na+ + Cl-

The concentration of \lbrack H^+\rbrack and concentration of \lbrack OH^-\rbrack of a 0.1 M aqueous solution of 2% ionised weak acid is ionic product of water=10^{-14})

How many oxygen molecules are present in 44gm of carbon dioxide?

Statement: The reuse strategy is better than recycling.This statement is __

What is molality?

The xcitation eneray of fist excited state of a hydrogen like atom is 40.8 eV. Find the energy nesegto remove the electron to form the ion.

The enthalpy of formation of ethane, ethylene and benzene from the gaseous atom are -2839.2,-2275.2and -5506 kJ mol respectively. Calculate the resonance energy of benzene. The bond enthalpy ofC-H bond is given as equal to +410.87 kd/mol.

Calculate △G⊖ for the following reaction: CO(g)+12O2(g)→CO2(g); △H⊖ = -282.84 kJ Given, S⊖Co2=213.8J K−1mol−1, S⊖CO(g) = 197.9 J K−1mol−1, S⊖Co2=205.0J K−1mol−1

In which process work acts as a state function :- (1) Isobaric process (2) Isochoric process (3) Adiabatic process (4) Both (1) & (2)

Identify A and B:

Calculatethe number of unpaired electrons in the following gaseous ions: Mn3+,Cr3+,V3+and Ti3+.Which one of these is the most stable in aqueous solution?

Cellulose acetate is a

A reaction is first order in A and second order in B: Write the differential rate equation. How is the rate affected on increasing the concentration of B three times? How is the rate affected when the concentrations of both A and B are doubled?

how there are 8 lobes in dz^2 orbital?

Which of the following is phenolic [J & K 2005]