15280 + Interview Questions in Chemistry Page 86 InterviewSolution

4251.	What are the no. of lone pairs and bond pairs in hydrazine ? Explain with diagramatic structure
Answer» What are the no. of lone pairs and bond pairs in hydrazine ? Explain with diagramatic structure

Discussion

4252.	(a) Which metal is extracted from bauxite ore? (b) Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula. (c) Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write an equation of the reactions involved. (d) Explain why, the galvanised iron article is protected against rusting even if the zinc layer is broken. (e) Name a common metal which is highly resistant to corrosion.
Answer» (a) Which metal is extracted from bauxite ore? (b) Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula. (c) Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write an equation of the reactions involved. (d) Explain why, the galvanised iron article is protected against rusting even if the zinc layer is broken. (e) Name a common metal which is highly resistant to corrosion.

Discussion

4253.	N_2 + 3H_2\xrightarrow{}2NH_3 Rate of production of NH_3 is 0.001 kg/hr then rate of dissapperance of H_2 will be?.
Answer» N_2 + 3H_2\xrightarrow{}2NH_3 Rate of production of NH_3 is 0.001 kg/hr then rate of dissapperance of H_2 will be?.

Discussion

4254.	Why we take E° + 0.059/n log (product)/(reactant) sometimes in nerst equation
Answer» Why we take E° + 0.059/n log (product)/(reactant) sometimes in nerst equation

Discussion

4255.	hydrogen (a moles)and iodine (b moles) react to give 2x moles of HI at equilibrium.the total number of moles at equilibrium i
Answer» hydrogen (a moles)and iodine (b moles) react to give 2x moles of HI at equilibrium.the total number of moles at equilibrium i

Discussion

4256.	Explain brosted lawry concept??
Answer» Explain brosted lawry concept??

Discussion

4257.	Highest energy will be absorbed to eject out of electron in the configuration:
Answer» Highest energy will be absorbed to eject out of electron in the configuration:

Discussion

4258.	The number of structural isomers of pentane is__.
Answer» The number of structural isomers of pentane is__.

Discussion

4259.	Why are organic compounds studied as a separate branch of chemistry? [5 MARKS]
Answer» Why are organic compounds studied as a separate branch of chemistry? [5 MARKS]

Discussion

4260.	(a)Draw the structures for the following compound: (i) Ethanoic acid(b)(ii) Bromopentane(c)(iii) Butanone(d)(iv) Hexanal(e)Are structural isomers possible for bromopentane?
Answer» (a) Draw the structures for the following compound: (i) Ethanoic acid (b) (ii) Bromopentane (c) (iii) Butanone (d) (iv) Hexanal (e) Are structural isomers possible for bromopentane?

Discussion

4261.	In the reaction2K_3\lbrack Fe(CN)_6\rbrack +2KOH +H_2O_2→2K_4\lbrack Fe(CN)_6\rbrack +2H_2O+O_2, H_2O_2 acts as(1) Reducing agen(2) Oxidising agent(3) Knocking agent(4) Bleaching agent
Answer» In the reaction2K_3\lbrack Fe(CN)_6\rbrack +2KOH +H_2O_2→2K_4\lbrack Fe(CN)_6\rbrack +2H_2O+O_2, H_2O_2 acts as(1) Reducing agen(2) Oxidising agent(3) Knocking agent(4) Bleaching agent

Discussion

4262.	2.What is metriod
Answer» 2.What is metriod

Discussion

4263.	if masses of all gas molecule of a gas are halved and their speed are doubled then the ratio of initial and final pressure will b
Answer» if masses of all gas molecule of a gas are halved and their speed are doubled then the ratio of initial and final pressure will b

Discussion

4264.	What will be the product, when carboxy phenol, obtained by Reimer-Tiemann's process, is deoxidised with Znpowder?
Answer» What will be the product, when carboxy phenol, obtained by Reimer-Tiemann's process, is deoxidised with Zn powder?

Discussion

4265.	The solubility product Mg(OH)2 and Al(OH)3 in water at 25∘C are 2.56×10−13 and 4.32×10−34 . If s1 and s2 are the solubilities of Mg(OH)2 and Al(OH)3 in water in mol/L at 25∘C what is the ratio s1/s2 ?
Answer» The solubility product $M g (O H)_{2}$ and $A l (O H)_{3}$ in water at $25^{\circ} C$ are $2.56 \times 10^{- 13}$ and $4.32 \times 10^{- 34}$ . If $s_{1}$ and $s_{2}$ are the solubilities of $M g (O H)_{2}$ and $A l (O H)_{3}$ in water in mol/L at $25^{\circ} C$ what is the ratio $s_{1} / s_{2}$ ?

Discussion

4266.	Chromium is a metal that does not corrode. Instead of electroplating iron with chromium, why are sanitary fittings not made of chromium itself?
Answer» Chromium is a metal that does not corrode. Instead of electroplating iron with chromium, why are sanitary fittings not made of chromium itself?

Discussion

4267.	A Pt complex of NH_{3 }and Cl produces four ions per molecule in the aq. solution is: (1) PtCl_4.6NH_{3 }(2)PtCl_4.5NH_{3 }(3)PtCl_4.2NH_{3 }(4)PtCl_4.4NH_3.
Answer» A Pt complex of NH_{3 }and Cl produces four ions per molecule in the aq. solution is: (1) PtCl_4.6NH_{3 }(2)PtCl_4.5NH_{3 }(3)PtCl_4.2NH_{3 }(4)PtCl_4.4NH_3.

Discussion

4268.	Why dont the products formed in double displacement reactions react with each other as there is no specific reason for the phenomenon of double displacement reactions?
Answer» Why dont the products formed in double displacement reactions react with each other as there is no specific reason for the phenomenon of double displacement reactions?

Discussion

4269.	The process which is used to prepare soap is known as:
Answer» The process which is used to prepare soap is known as:

Discussion

4270.	Give a test that can be used to differentiate chemically between butter and cooking oil.
Answer» Give a test that can be used to differentiate chemically between butter and cooking oil.

Discussion

4271.	4. Is there any compound called 2-chloropropan -2 ol? If it is then does it contain a. chiral carbon atom ? 1 2 2 3 3 4 4 5
Answer» 4. Is there any compound called 2-chloropropan -2 ol? If it is then does it contain a. chiral carbon atom ? 1 2 2 3 3 4 4 5

Discussion

4272.	If a compound has 3 carbon atoms.How many different saturated carbon skeletons are possible?
Answer» If a compound has 3 carbon atoms.How many different saturated carbon skeletons are possible?

Discussion

4273.	What is enamelling?
Answer» What is enamelling?

Discussion

4274.	the element having no neutron in the nucleus of its atom is
Answer» the element having no neutron in the nucleus of its atom is

Discussion

4275.	Arrange increasing order of acidic character? HClO3, HBrO3, HIO3, HClO, HBrO, HIO
Answer» Arrange increasing order of acidic character? HClO3, HBrO3, HIO3, HClO, HBrO, HIO

Discussion

4276.	Silvercrystallises in fcc lattice. If edge length of the cell is 4.07 ×10−8cm and density is 10.5 g cm−3,calculate the atomic mass of silver.
Answer» Silver crystallises in fcc lattice. If edge length of the cell is 4.07 × 10⁻⁸ cm and density is 10.5 g cm⁻³, calculate the atomic mass of silver.

Discussion

4277.	42. Geometry (arrangement of electron pairs around central atom) of ClOF3 is similar to a)XeF4 b)SOCl2 c)ClO4-
Answer» 42. Geometry (arrangement of electron pairs around central atom) of ClOF3 is similar to a)XeF4 b)SOCl2 c)ClO4-

Discussion

4278.	In the formula to find energy of a particular shell negative (-) sign is used, what is reason behind it?{E=-13. 6/n2 * Z(squared) eV
Answer» In the formula to find energy of a particular shell negative (-) sign is used, what is reason behind it?{E=-13. 6/n2 * Z(squared) eV

Discussion

4279.	is the formula of limiting reagent that which will have less value of moles upon stochiometric coefficient valid for all sums of limiting reagent?
Answer» is the formula of limiting reagent that which will have less value of moles upon stochiometric coefficient valid for all sums of limiting reagent?

Discussion

4280.	(a) Is it possible to change the temperature and pressure of a fixed mass of a gas without changing its volume? Explain your answer.(b) Define or explain the meaning of the term 'molar volume'.
Answer» (a) Is it possible to change the temperature and pressure of a fixed mass of a gas without changing its volume? Explain your answer. (b) Define or explain the meaning of the term 'molar volume'.

Discussion

4281.	Two chemicals in solution form react, forming an insoluble solid that settles down. What is the settled solid known as?
Answer» Two chemicals in solution form react, forming an insoluble solid that settles down. What is the settled solid known as?

Discussion

4282.	How many number of hydrogen atoms can combine with n number of carbon atoms to form an alkene?
Answer» How many number of hydrogen atoms can combine with n number of carbon atoms to form an alkene?

Discussion

4283.	If solubilty of hcl is 0.5m at stp then calculate henry law constant
Answer» If solubilty of hcl is 0.5m at stp then calculate henry law constant

Discussion

4284.	(i) State the number of elements in period 1, period 2, and period 3 of the periodic table.(ii) Name the elements in period 1.(iii) What happens to the atomic size of elements on moving from left to right in a period?
Answer» (i) State the number of elements in period 1, period 2, and period 3 of the periodic table. (ii) Name the elements in period 1. (iii) What happens to the atomic size of elements on moving from left to right in a period?

Discussion

4285.	Equivalent conductance of 0.1 M HA(weak acid) solution is 1 Scm2equivalent-1 and that at infinite dilution is 100 Scm2equivalent-1 Hence pH of HA solution is
Answer» Equivalent conductance of 0.1 M HA(weak acid) solution is 1 Scm2equivalent-1 and that at infinite dilution is 100 Scm2equivalent-1 Hence pH of HA solution is

Discussion

4286.	What happens when electrolysis of brine is done with Mercury cathode?Give detailed explanation.
Answer» What happens when electrolysis of brine is done with Mercury cathode? Give detailed explanation.

Discussion

4287.	KF has NaCl type structure.its density is 3.84 g/ cm3 and its molar mass is 58 g/ mol.the distance between K+ and F- ions will be
Answer» KF has NaCl type structure.its density is 3.84 g/ cm3 and its molar mass is 58 g/ mol.the distance between K+ and F- ions will be

Discussion

4288.	no. of sigma and pi bonds in calcium carbide(CaC_2) is
Answer» no. of sigma and pi bonds in calcium carbide(CaC_2) is

Discussion

4289.	Two sources of cholecystokinin?
Answer» Two sources of cholecystokinin?

Discussion

4290.	What happens when ethanoic acid react with zinc?
Answer» What happens when ethanoic acid react with zinc?

Discussion

4291.	Which of the following cannot conduct electricity in a fused state?
Answer» Which of the following cannot conduct electricity in a fused state?

Discussion

4292.	What conditions make a molecule suitable for easy hydration ?
Answer» What conditions make a molecule suitable for easy hydration ?

Discussion

4293.	What is difference between and inorganic compounds?Why ammonium cynate is a inorganic compounds?
Answer» What is difference between and inorganic compounds?Why ammonium cynate is a inorganic compounds?

Discussion

4294.	The Sulphate of a metal contains 20% metal. This sulphate is isomorphous with zinc sulphate hepta hydrate. The atomic mass of the metal is
Answer» The Sulphate of a metal contains 20% metal. This sulphate is isomorphous with zinc sulphate hepta hydrate. The atomic mass of the metal is

4294.

The Sulphate of a metal contains 20% metal. This sulphate is isomorphous with zinc sulphate hepta hydrate. The atomic mass of the metal is

Answer»

The Sulphate of a metal contains 20% metal. This sulphate is isomorphous with zinc sulphate hepta hydrate. The atomic mass of the metal is

Discussion

4295.	How can you make a chemical equation more informative
Answer» How can you make a chemical equation more informative

Discussion

4296.	3) write about raoult's law for non-volatile solute and prove it. write the formula to find out molecular mass of solute according to above rule.
Answer» 3) write about raoult's law for non-volatile solute and prove it. write the formula to find out molecular mass of solute according to above rule.

Discussion

4297.	What happens when electric current is passed through acidified water? Name the type of reaction involved.
Answer» What happens when electric current is passed through acidified water? Name the type of reaction involved.

Discussion

4298.	Passage of Ammonia gas through copper sulphate forms pale blue precipitate.What is the precipitate?
Answer» Passage of Ammonia gas through copper sulphate forms pale blue precipitate.What is the precipitate?

Discussion

4299.	What are the subtypes of Terrestrial Ecosystems
Answer» What are the subtypes of Terrestrial Ecosystems

Discussion

4300.	Which among the given options is a Hypophosphite ion?
Answer» Which among the given options is a Hypophosphite ion?

Discussion

Explore topic-wise InterviewSolutions in .

What are the no. of lone pairs and bond pairs in hydrazine ? Explain with diagramatic structure

N_2 + 3H_2\xrightarrow{}2NH_3 Rate of production of NH_3 is 0.001 kg/hr then rate of dissapperance of H_2 will be?.

Why we take E° + 0.059/n log (product)/(reactant) sometimes in nerst equation

hydrogen (a moles)and iodine (b moles) react to give 2x moles of HI at equilibrium.the total number of moles at equilibrium i

Explain brosted lawry concept??

Highest energy will be absorbed to eject out of electron in the configuration:

The number of structural isomers of pentane is__.

Why are organic compounds studied as a separate branch of chemistry? [5 MARKS]

(a)Draw the structures for the following compound: ​(i) Ethanoic acid(b)(ii) Bromopentane(c)(iii) Butanone(d)(iv) Hexanal(e)Are structural isomers possible for bromopentane?

In the reaction2K_3\lbrack Fe(CN)_6\rbrack +2KOH +H_2O_2→2K_4\lbrack Fe(CN)_6\rbrack +2H_2O+O_2, H_2O_2 acts as(1) Reducing agen(2) Oxidising agent(3) Knocking agent(4) Bleaching agent

2.What is metriod

if masses of all gas molecule of a gas are halved and their speed are doubled then the ratio of initial and final pressure will b

What will be the product, when carboxy phenol, obtained by Reimer-Tiemann's process, is deoxidised with Znpowder?

The solubility product Mg(OH)2 and Al(OH)3 in water at 25∘C are 2.56×10−13 and 4.32×10−34 . If s1 and s2 are the solubilities of Mg(OH)2 and Al(OH)3 in water in mol/L at 25∘C what is the ratio s1/s2 ?

Chromium is a metal that does not corrode. Instead of electroplating iron with chromium, why are sanitary fittings not made of chromium itself?

A Pt complex of NH_{3 }and Cl produces four ions per molecule in the aq. solution is: (1) PtCl_4.6NH_{3 }(2)PtCl_4.5NH_{3 }(3)PtCl_4.2NH_{3 }(4)PtCl_4.4NH_3.

Why dont the products formed in double displacement reactions react with each other as there is no specific reason for the phenomenon of double displacement reactions?

The process which is used to prepare soap is known as:

Give a test that can be used to differentiate chemically between butter and cooking oil.

4. Is there any compound called 2-chloropropan -2 ol? If it is then does it contain a. chiral carbon atom ? 1 2 2 3 3 4 4 5

If a compound has 3 carbon atoms.How many different saturated carbon skeletons are possible?

What is enamelling?

the element having no neutron in the nucleus of its atom is

Arrange increasing order of acidic character? HClO3, HBrO3, HIO3, HClO, HBrO, HIO

Silvercrystallises in fcc lattice. If edge length of the cell is 4.07 ×10−8cm and density is 10.5 g cm−3,calculate the atomic mass of silver.

42. Geometry (arrangement of electron pairs around central atom) of ClOF3 is similar to a)XeF4 b)SOCl2 c)ClO4-

In the formula to find energy of a particular shell negative (-) sign is used, what is reason behind it?{E=-13. 6/n2 * Z(squared) eV

is the formula of limiting reagent that which will have less value of moles upon stochiometric coefficient valid for all sums of limiting reagent?

(a) Is it possible to change the temperature and pressure of a fixed mass of a gas without changing its volume? Explain your answer.(b) Define or explain the meaning of the term 'molar volume'.

Two chemicals in solution form react, forming an insoluble solid that settles down. What is the settled solid known as?

How many number of hydrogen atoms can combine with n number of carbon atoms to form an alkene?

If solubilty of hcl is 0.5m at stp then calculate henry law constant

(i) State the number of elements in period 1, period 2, and period 3 of the periodic table.(ii) Name the elements in period 1.(iii) What happens to the atomic size of elements on moving from left to right in a period?

Equivalent conductance of 0.1 M HA(weak acid) solution is 1 Scm2equivalent-1 and that at infinite dilution is 100 Scm2equivalent-1 Hence pH of HA solution is

What happens when electrolysis of brine is done with Mercury cathode?Give detailed explanation.

KF has NaCl type structure.its density is 3.84 g/ cm3 and its molar mass is 58 g/ mol.the distance between K+ and F- ions will be

no. of sigma and pi bonds in calcium carbide(CaC_2) is

Two sources of cholecystokinin?

What happens when ethanoic acid react with zinc?

Which of the following cannot conduct electricity in a fused state?

What conditions make a molecule suitable for easy hydration ?

What is difference between and inorganic compounds?Why ammonium cynate is a inorganic compounds?

The Sulphate of a metal contains 20% metal. This sulphate is isomorphous with zinc sulphate hepta hydrate. The atomic mass of the metal is

How can you make a chemical equation more informative

3) write about raoult's law for non-volatile solute and prove it. write the formula to find out molecular mass of solute according to above rule.

What happens when electric current is passed through acidified water? Name the type of reaction involved.

Passage of Ammonia gas through copper sulphate forms pale blue precipitate.What is the precipitate?

What are the subtypes of Terrestrial Ecosystems

Which among the given options is a Hypophosphite ion?

(a)Draw the structures for the following compound: (i) Ethanoic acid(b)(ii) Bromopentane(c)(iii) Butanone(d)(iv) Hexanal(e)Are structural isomers possible for bromopentane?