15280 + Interview Questions in Chemistry Page 13 InterviewSolution

601.	58. A+2BC+4D Rate of reaction is 5x10^{-2} moles/L/sec. calculate rate of appearance of D and rate of disapperance of A.
Answer» 58. A+2BC+4D Rate of reaction is 5x10^{-2} moles/L/sec. calculate rate of appearance of D and rate of disapperance of A.

Discussion

602.	25. At 300k for a reaction: N2+3H2-------2NH3 then equilibrium concentration of each species is found to be 0.1 M.then find the value of gibbs free energy for the reaction (B)why digestion is as decomposition reaction (B)why are the bags of Potato chips usually flushed with nitrogen gas (D)why does coppervessels lose their shine when exposed with air
Answer» 25. At 300k for a reaction: N2+3H2-------2NH3 then equilibrium concentration of each species is found to be 0.1 M.then find the value of gibbs free energy for the reaction (B)why digestion is as decomposition reaction (B)why are the bags of Potato chips usually flushed with nitrogen gas (D)why does coppervessels lose their shine when exposed with air

Discussion

603.	will dissociate in water to furnish hydroxide ions.
Answer» will dissociate in water to furnish hydroxide ions.

Discussion

604.	"pH has great importance in our daily life". Explain by giving three examples.
Answer» "pH has great importance in our daily life". Explain by giving three examples.

Discussion

605.	Choose electrophiles from the given ions.
Answer» Choose electrophiles from the given ions.

Discussion

606.	Name the source from which litmus solution is obtained. What is the use of this solution?
Answer» Name the source from which litmus solution is obtained. What is the use of this solution?

Discussion

607.	what is activation energy for a reaction if its rate doubles when the temperature is raised from 20degree to 35 degree centigrad
Answer» what is activation energy for a reaction if its rate doubles when the temperature is raised from 20degree to 35 degree centigrad

Discussion

608.	Write balanced equations for the following conversions (a) ZnSO4A⟶Zn(OH)2B⟶ (b) CuSO4A⟶Cu(OH)2B⟶[Cu(NH3)4]SO4
Answer» Write balanced equations for the following conversions (a) $Z n S O_{4} A ⟶ Z n (O H)_{2} B ⟶$ (b) $C u S O_{4} A ⟶ C u (O H)_{2} B ⟶ [C u (N H_{3}) 4] S O_{4}$

Discussion

609.	What is Calcination? Write two uses of it?
Answer» What is Calcination? Write two uses of it?

Discussion

610.	Partial pressure of CH4 gas in the mixture of CH4 and He gases in a flask is 5atm.if that mixture is at STP the weight of the helium gas is
Answer» Partial pressure of $C H_{4}$ gas in the mixture of $C H_{4}$ and He gases in a flask is 5atm.if that mixture is at STP the weight of the helium gas is

Discussion

611.	Write chemical equation for the following events.a. Aluminium came in contact with air.b. Iron filings are dropped in aqueous solution of copper sulphate.c. A reaction was brought about between ferric oxide and aluminium.d. Electrolysis of alumina is done.e. Zinc oxide is dissolved in dilute hydrochloric acid.
Answer» Write chemical equation for the following events. a. Aluminium came in contact with air. b. Iron filings are dropped in aqueous solution of copper sulphate. c. A reaction was brought about between ferric oxide and aluminium. d. Electrolysis of alumina is done. e. Zinc oxide is dissolved in dilute hydrochloric acid.

Discussion

612.	Which metal hydroxides upon heating gives Metal oxide + water.And which metal will give directly metal
Answer» Which metal hydroxides upon heating gives Metal oxide + water. And which metal will give directly metal

Discussion

613.	The porosity (n) and the degree of saturation (S) of a soil sample are 0.7 and 40%, respectively. In a 100 m3 volume of the soil, the volume (expressed in m3) of air is 42
Answer» The porosity $(n)$ and the degree of saturation $(S)$ of a soil sample are 0.7 and 40%, respectively. In a 100 $m^{3}$ volume of the soil, the volume $(e x p r e s s e d i n m^{3})$ of air is 42

Discussion

614.	An air bubble of radius 10-2 m is rising up at asteady rate of 2 10-3 ms-1 through a liquid ofdensity 1.5 x 103 kg m-3, the coefficient of viscosityneglecting the density of air, will be (g 10 ms?(1) 23.2 units(2) 83.5 units(3) 334 units(4) 167 units
Answer» An air bubble of radius 10-2 m is rising up at asteady rate of 2 10-3 ms-1 through a liquid ofdensity 1.5 x 103 kg m-3, the coefficient of viscosityneglecting the density of air, will be (g 10 ms?(1) 23.2 units(2) 83.5 units(3) 334 units(4) 167 units

Discussion

615.	Répondez aux questions en utilisant si ou non.1. Il ne pleut pas souvent? (si)2. Il ne neige pas en hiver ici? (non)3. Tu ne fais pas tes devoirs? (si)4. Vous n'aimez pas danser? (si)5. Il ne porte pas d'écharpe? (non)
Answer» Répondez aux questions en utilisant si ou non. 1. Il ne pleut pas souvent? (si) 2. Il ne neige pas en hiver ici? (non) 3. Tu ne fais pas tes devoirs? (si) 4. Vous n'aimez pas danser? (si) 5. Il ne porte pas d'écharpe? (non)

Discussion

616.	what is 4 bond pair and 1 lone pair?
Answer» what is 4 bond pair and 1 lone pair?

Discussion

617.	In Dumas method for estimation of nitrogen 30g of an organic compound gave 50ml of nitrogen collected at 300k temperature and 715mm pressure. Find the % of nitrogen in the given compound.
Answer» In Dumas method for estimation of nitrogen 30g of an organic compound gave 50ml of nitrogen collected at 300k temperature and 715mm pressure. Find the $%$ of nitrogen in the given compound.

Discussion

618.	Name some metals that are used for making cooking vessels and why these metals are used for making cooking vessels
Answer» Name some metals that are used for making cooking vessels and why these metals are used for making cooking vessels

Discussion

619.	3. What is the number of electrons in 0.16g of oxygen
Answer» 3. What is the number of electrons in 0.16g of oxygen

Discussion

620.	Which of the following pairs are not isomers ?
Answer» Which of the following pairs are not isomers ?

Discussion

621.	Why calcium oxide cannot be used as a drying agent in laboratory preparation of HCl?
Answer» Why calcium oxide cannot be used as a drying agent in laboratory preparation of HCl?

Discussion

622.	Why is ethanol soluble in water?
Answer» Why is ethanol soluble in water?

Discussion

623.	0.1M acetic acid solution is titratedaginst 0.1 M NaoH solution. What would be the difference in pH between 1/4 and3/4 stages of neutralization of acid?
Answer» 0.1M acetic acid solution is titrated aginst 0.1 M NaoH solution. What would be the difference in pH between 1/4 and 3/4 stages of neutralization of acid?

Discussion

624.	How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?
Answer» How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?

Discussion

625.	If electron is a particle then what its shape?
Answer» If electron is a particle then what its shape?

Discussion

626.	47. Calculate mole fraction of solvent when molality(m) is 5 in C6H6.
Answer» 47. Calculate mole fraction of solvent when molality(m) is 5 in C6H6.

Discussion

627.	Two atoms of X combine with three atoms of Y to formX2Y3 From the chemical formula, it can be concluded that the valency of X and Y is ___ and ____ respectively.
Answer» Two atoms of X combine with three atoms of Y to form $X_{2} Y_{3}$ From the chemical formula, it can be concluded that the valency of X and Y is ___ and ____ respectively.

Discussion

628.	During manufacturing of glass, X is used to increase fusibility. X is
Answer» During manufacturing of glass, X is used to increase fusibility. X is

Discussion

629.	calculate the weight of CO having same number of oxygen atm as present in 22g of CO_2
Answer» calculate the weight of CO having same number of oxygen atm as present in 22g of CO_2

Discussion

630.	Covalent bond is___.
Answer» Covalent bond is___.

Discussion

631.	Acids dissolve most metals, which special mixture of acids is used to dissolve gold?
Answer» Acids dissolve most metals, which special mixture of acids is used to dissolve gold?

Discussion

632.	44. The mole fraction of A in the vapour phase is X and in Liquid is Y then total vapour pressure of a liquid mixture is
Answer» 44. The mole fraction of A in the vapour phase is X and in Liquid is Y then total vapour pressure of a liquid mixture is

Discussion

633.	Which one of the following is correct order of the size of iodine species?
Answer» Which one of the following is correct order of the size of iodine species?

Discussion

634.	Which of the following can be decomposed by the action of light ? (a) NaCl (b) KCl (c) AgCl (d) CuCl
Answer» Which of the following can be decomposed by the action of light ? (a) NaCl (b) KCl (c) AgCl (d) CuCl

634.

Which of the following can be decomposed by the action of light ? (a) NaCl (b) KCl (c) AgCl (d) CuCl

Answer»

Which of the following can be decomposed by the action of light ?

(a) NaCl (b) KCl (c) AgCl (d) CuCl

Discussion

635.	Identify A and B in the given reaction: 2Al2O3(s)+3C(s)→4A + 3B.
Answer» Identify A and B in the given reaction: $2 {Al}_{2} O_{3} (s) + 3 C(s) \to 4A + 3B$ .

Discussion

636.	When sodium hydrogen carbonate is added to nitric acid which of the following is formed?
Answer» When sodium hydrogen carbonate is added to nitric acid which of the following is formed?

Discussion

637.	9.The compound used for artificial ripening of fruit is MgSO4,CaC2,MgCl2,NaCl
Answer» 9.The compound used for artificial ripening of fruit is MgSO4,CaC2,MgCl2,NaCl

Discussion

638.	how many ions are present in 212 grams of sodium carbonate?
Answer» how many ions are present in 212 grams of sodium carbonate?

Discussion

639.	Write a brief note on the occurrence of carbon.
Answer» Write a brief note on the occurrence of carbon.

Discussion

640.	When a liquid conducts electricity, a process other than conduction also takes place. What process is this?
Answer» When a liquid conducts electricity, a process other than conduction also takes place. What process is this?

Discussion

641.	Arrange copper, silver,and aluminum in order of their increasing electrical conductivity
Answer» Arrange copper, silver,and aluminum in order of their increasing electrical conductivity

Discussion

642.	Choose the correct order of the strokes in an internal combustion engine.
Answer» Choose the correct order of the strokes in an internal combustion engine.

Discussion

643.	For nomenclature of trivial names , the terms ISO and neo is used . on what basis the second or second last carbon is chose. The first carbon should always be the functional group attached carbon right? , as in tert.butyl alcohol. On the similar basis , Also explain how the naming of ISO propyl alcohol is done ?
Answer» For nomenclature of trivial names , the terms ISO and neo is used . on what basis the second or second last carbon is chose. The first carbon should always be the functional group attached carbon right? , as in tert.butyl alcohol. On the similar basis , Also explain how the naming of ISO propyl alcohol is done ?

Discussion

644.	Can acidic / basic amino acids be zwitter ions?
Answer» Can acidic / basic amino acids be zwitter ions?

Discussion

645.	calculate the weight of CO having the same number of oxygen atoms as are present in 22g of CO_2
Answer» calculate the weight of CO having the same number of oxygen atoms as are present in 22g of CO_2

Discussion

646.	CFC usage is more in modern days because it is:
Answer» CFC usage is more in modern days because it is:

Discussion

647.	Select the 'balanced' equations.
Answer» Select the 'balanced' equations.

Discussion

648.	An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium(III) chloride. The number of moles of AgCl precipitated would be:
Answer» An excess of $A g N O_{3}$ is added to $100 mL$ of a $0.01 M$ solution of dichlorotetraaquachromium(III) chloride. The number of moles of $A g C l$ precipitated would be:

Discussion

649.	Find the 5th coordination number in CsCl structure . Also find the distance of the atom (from cs+) ?
Answer» Find the 5th coordination number in CsCl structure . Also find the distance of the atom (from cs+) ?

Discussion

650.	The flow chart given below are examples of materials X and Y. Identify X and Y
Answer» The flow chart given below are examples of materials X and Y. Identify X and Y

Discussion

Explore topic-wise InterviewSolutions in .

58. A+2BC+4D Rate of reaction is 5x10^{-2} moles/L/sec. calculate rate of appearance of D and rate of disapperance of A.

will dissociate in water to furnish hydroxide ions.

"pH has great importance in our daily life". Explain by giving three examples.

Choose electrophiles from the given ions.

Name the source from which litmus solution is obtained. What is the use of this solution?

what is activation energy for a reaction if its rate doubles when the temperature is raised from 20degree to 35 degree centigrad

Write balanced equations for the following conversions (a) ZnSO4A⟶Zn(OH)2B⟶ (b) CuSO4A⟶Cu(OH)2B⟶[Cu(NH3)4]SO4

What is Calcination? Write two uses of it?

Partial pressure of CH4 gas in the mixture of CH4 and He gases in a flask is 5atm.if that mixture is at STP the weight of the helium gas is

Which metal hydroxides upon heating gives Metal oxide + water.And which metal will give directly metal

The porosity (n) and the degree of saturation (S) of a soil sample are 0.7 and 40%, respectively. In a 100 m3 volume of the soil, the volume (expressed in m3) of air is 42

An air bubble of radius 10-2 m is rising up at asteady rate of 2 10-3 ms-1 through a liquid ofdensity 1.5 x 103 kg m-3, the coefficient of viscosityneglecting the density of air, will be (g 10 ms?(1) 23.2 units(2) 83.5 units(3) 334 units(4) 167 units

Répondez aux questions en utilisant si ou non.1. Il ne pleut pas souvent? (si)2. Il ne neige pas en hiver ici? (non)3. Tu ne fais pas tes devoirs? (si)4. Vous n'aimez pas danser? (si)5. Il ne porte pas d'écharpe? (non)

what is 4 bond pair and 1 lone pair?

In Dumas method for estimation of nitrogen 30g of an organic compound gave 50ml of nitrogen collected at 300k temperature and 715mm pressure. Find the % of nitrogen in the given compound.

Name some metals that are used for making cooking vessels and why these metals are used for making cooking vessels

3. What is the number of electrons in 0.16g of oxygen

Which of the following pairs are not isomers ?

Why calcium oxide cannot be used as a drying agent in laboratory preparation of HCl?

Why is ethanol soluble in water?

0.1M acetic acid solution is titratedaginst 0.1 M NaoH solution. What would be the difference in pH between 1/4 and3/4 stages of neutralization of acid?

How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?​

If electron is a particle then what its shape?

47. Calculate mole fraction of solvent when molality(m) is 5 in C6H6.

Two atoms of X combine with three atoms of Y to formX2Y3 From the chemical formula, it can be concluded that the valency of X and Y is ___ and ____ respectively.

During manufacturing of glass, X is used to increase fusibility. X is

calculate the weight of CO having same number of oxygen atm as present in 22g of CO_2

Covalent bond is___.

Acids dissolve most metals, which special mixture of acids is used to dissolve gold?

44. The mole fraction of A in the vapour phase is X and in Liquid is Y then total vapour pressure of a liquid mixture is

Which one of the following is correct order of the size of iodine species?

Which of the following can be decomposed by the action of light ? (a) NaCl (b) KCl (c) AgCl (d) CuCl

Identify A and B in the given reaction: 2Al2O3(s)+3C(s)→4A + 3B.

When sodium hydrogen carbonate is added to nitric acid which of the following is formed?

9.The compound used for artificial ripening of fruit is MgSO4,CaC2,MgCl2,NaCl

how many ions are present in 212 grams of sodium carbonate?

Write a brief note on the occurrence of carbon.

When a liquid conducts electricity, a process other than conduction also takes place. What process is this?

Arrange copper, silver,and aluminum in order of their increasing electrical conductivity

Choose the correct order of the strokes in an internal combustion engine.

Can acidic / basic amino acids be zwitter ions?

calculate the weight of CO having the same number of oxygen atoms as are present in 22g of CO_2

CFC usage is more in modern days because it is:

Select the 'balanced' equations.

An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium(III) chloride. The number of moles of AgCl precipitated would be:

Find the 5th coordination number in CsCl structure . Also find the distance of the atom (from cs+) ?

The flow chart given below are examples of materials X and Y. Identify X and Y

How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?

Two atoms of X combine with three atoms of Y to formX2Y3 From the chemical formula, it can be concluded that the valency of X and Y is _ and __ respectively.