15280 + Interview Questions in Chemistry Page 175 InterviewSolution

8701.	A compound H2X with molar weight of 80 g is dissolved in a solvent having density of 0.4 g mL−1. Assuming no change in volume upon dissolution, the molality of a 3.2 molar solution is ___
Answer» A compound $H_{2} X$ with molar weight of 80 g is dissolved in a solvent having density of 0.4 g $m L^{- 1} .$ Assuming no change in volume upon dissolution, the molality of a 3.2 molar solution is ___

Discussion

8702.	Why iron hydroxide is insoluble in water and why all bases are not alkali why why why😣😣
Answer» Why iron hydroxide is insoluble in water and why all bases are not alkali why why why😣😣

Discussion

8703.	The condition in Boyle's law is that the ________ is constant.
Answer» The condition in Boyle's law is that the ________ is constant.

Discussion

8704.	Explain turbidity of water. How is turbidity measured? What causes water to become turbid? [3 MARKS]
Answer» Explain turbidity of water. How is turbidity measured? What causes water to become turbid? [3 MARKS]

Discussion

8705.	Question 1 Did Dobereiner's triads also exist in the columns of Newlands' octaves? Compare and find out.
Answer» Question 1 Did Dobereiner's triads also exist in the columns of Newlands' octaves? Compare and find out.

Discussion

8706.	Calculate the percentage of Nitrogen in the fertilizer, Ammonium Nitrate NH4NO3 [H = 1, N = 14, O = 16]
Answer» Calculate the percentage of Nitrogen in the fertilizer, Ammonium Nitrate $N H_{4} N O_{3}$ [H = 1, N = 14, O = 16]

8706.

Calculate the percentage of Nitrogen in the fertilizer, Ammonium Nitrate NH4NO3 [H = 1, N = 14, O = 16]

Answer»

Calculate the percentage of Nitrogen in the fertilizer, Ammonium Nitrate $N H_{4} N O_{3}$

[H = 1, N = 14, O = 16]

Discussion

8707.	Hydrochloric acid is prepared by dissolving _______ in water.
Answer» Hydrochloric acid is prepared by dissolving _______ in water.

Discussion

8708.	Which property of the polyvinyl chloride makes it suitable for coating of electrical wires in homes?
Answer» Which property of the polyvinyl chloride makes it suitable for coating of electrical wires in homes?

8708.

Which property of the polyvinyl chloride makes it suitable for coating of electrical wires in homes?

Answer»

Which property of the polyvinyl chloride makes it suitable for coating of electrical wires in homes?

Discussion

8709.	Question 9 Why are carbon and its compounds used as fuel for most applications?
Answer» Question 9 Why are carbon and its compounds used as fuel for most applications?

Discussion

8710.	Which of the following orders is correct for stability of these radicals?
Answer» Which of the following orders is correct for stability of these radicals?

Discussion

8711.	In a hypothetical universe, if atomic numbers were used to form triads, which of the following will make triad with Na and K?
Answer» In a hypothetical universe, if atomic numbers were used to form triads, which of the following will make triad with Na and K?

Discussion

8712.	The total number of single bonds in a water molecule are:
Answer» The total number of single bonds in a water molecule are:

Discussion

8713.	Sort the elements which do not react with hot as well as cold water.Sodium, Potassium, Zinc and Iron.
Answer» Sort the elements which do not react with hot as well as cold water. Sodium, Potassium, Zinc and Iron.

8713.

Sort the elements which do not react with hot as well as cold water.Sodium, Potassium, Zinc and Iron.

Answer»

Sort the elements which do not react with hot as well as cold water.

Sodium, Potassium, Zinc and Iron.

Discussion

8714.	The species undergoing oxidation acts as a _____ agent.
Answer» The species undergoing oxidation acts as a _____ agent.

Discussion

8715.	Addition of an electron to a neutral gaseous atom always leads to (i) Formation of an anion (ii) Liberation of energy (iii) Decrease in proton/electron ratio Are all these option correct?
Answer» Addition of an electron to a neutral gaseous atom always leads to (i) Formation of an anion (ii) Liberation of energy (iii) Decrease in proton/electron ratio Are all these option correct?

Discussion

8716.	An aquash solution of 6.3 gram of oxalic acid dihydrate is made upto 250 ml. The volume of 0.1 M NaOH required to completely neutralize 10 ml of this solution is what ?
Answer» An aquash solution of 6.3 gram of oxalic acid dihydrate is made upto 250 ml. The volume of 0.1 M NaOH required to completely neutralize 10 ml of this solution is what ?

Discussion

8717.	Question 6Compounds such as alcohols and glucose also contain hydrogen but are not categorized as acids. Describe an activity to prove it.
Answer» Question 6 Compounds such as alcohols and glucose also contain hydrogen but are not categorized as acids. Describe an activity to prove it.

Discussion

8718.	Two metals X and Y form the salts XSO4 and Y2SO4, respectively. The solution of salt XSO4 is blue in colour whereas that of Y2SO4 is colourless. When barium chloride solution is added to XSO4 solution, then a white precipitate Z is formed along with a salt which turns the solution green. And when barium chloride solution is added to Y2SO4 solution, then the same white precipitate Z is formed along with colourless common salt solution. (a) What could the metal X and Y be ? (b) Write the name and formula of salt XSO4. (c) Write the name and formula of salt Y2SO4. (d) What is the name and formla of white precipitate Z ? (e) Write the name and formula of the salt which turns the solution green in the first case.
Answer» Two metals X and Y form the salts $X S O_{4}$ and $Y_{2} S O_{4}$ , respectively. The solution of salt $X S O_{4}$ is blue in colour whereas that of $Y_{2} S O_{4}$ is colourless. When barium chloride solution is added to $X S O_{4}$ solution, then a white precipitate Z is formed along with a salt which turns the solution green. And when barium chloride solution is added to $Y_{2} S O_{4}$ solution, then the same white precipitate Z is formed along with colourless common salt solution. (a) What could the metal X and Y be ? (b) Write the name and formula of salt $X S O_{4}$ . (c) Write the name and formula of salt $Y_{2} S O_{4}$ . (d) What is the name and formla of white precipitate Z ? (e) Write the name and formula of the salt which turns the solution green in the first case.

8718.

Two metals X and Y form the salts XSO4 and Y2SO4, respectively. The solution of salt XSO4 is blue in colour whereas that of Y2SO4 is colourless. When barium chloride solution is added to XSO4 solution, then a white precipitate Z is formed along with a salt which turns the solution green. And when barium chloride solution is added to Y2SO4 solution, then the same white precipitate Z is formed along with colourless common salt solution. (a) What could the metal X and Y be ? (b) Write the name and formula of salt XSO4. (c) Write the name and formula of salt Y2SO4. (d) What is the name and formla of white precipitate Z ? (e) Write the name and formula of the salt which turns the solution green in the first case.

Answer»

Two metals X and Y form the salts $X S O_{4}$ and $Y_{2} S O_{4}$ , respectively. The solution of salt $X S O_{4}$ is blue in colour whereas that of $Y_{2} S O_{4}$ is colourless. When barium chloride solution is added to $X S O_{4}$ solution, then a white precipitate Z is formed along with a salt which turns the solution green. And when barium chloride solution is added to $Y_{2} S O_{4}$ solution, then the same white precipitate Z is formed along with colourless common salt solution.

(a) What could the metal X and Y be ?

(b) Write the name and formula of salt $X S O_{4}$ .

(c) Write the name and formula of salt $Y_{2} S O_{4}$ .

(d) What is the name and formla of white precipitate Z ?

(e) Write the name and formula of the salt which turns the solution green in the first case.

Discussion

8719.	34. Which of the following is not intramolecular redox reaction? 1) NH4NO2-------->N2+2H2O 2) 2Mn2O7--------->4MnO2+3O2 3) 2KClO3----------->2KCl+3O2 4) 2H2O2----------->2H2O+O2
Answer» 34. Which of the following is not intramolecular redox reaction? 1) NH4NO2-------->N2+2H2O 2) 2Mn2O7--------->4MnO2+3O2 3) 2KClO3----------->2KCl+3O2 4) 2H2O2----------->2H2O+O2

Discussion

8720.	52. give the hybridisation and shape of [Cu(NH3)4]2+
Answer» 52. give the hybridisation and shape of [Cu(NH3)4]2+

Discussion

8721.	Bond length is defined as the "equilibrium dis†an ce" between the nuclei of bonded atoms in a molecule. what is the meaning of equilibrium dis†an ce
Answer» Bond length is defined as the "equilibrium dis†an ce" between the nuclei of bonded atoms in a molecule. what is the meaning of equilibrium dis†an ce

Discussion

8722.

Making use only of substances chosen from those given below: Dilute sulphuric acid Zinc Lead sodium carbonate sodium sulphite calcium carbonate Give the equations for the reactions by which you could obtain:(i) hydrogen(ii) sulphur dioxide(iii) carbon dioxide(iv) zinc carbonate (two steps required).

Answer»

Making use only of substances chosen from those given below:

Dilute sulphuric acid

Zinc

Lead

sodium carbonate

sodium sulphite

calcium carbonate

Give the equations for the reactions by which you could obtain:

(i) hydrogen

(ii) sulphur dioxide

(iii) carbon dioxide

(iv) zinc carbonate (two steps required).

Discussion

8723.	Which reaction does gay lussacs law is not applicable and why
Answer» Which reaction does gay lussacs law is not applicable and why

Discussion

8724.	What is meant by the activity series of metals? Compare the activity of sodium and iron with air, water and dilute acids.
Answer» What is meant by the activity series of metals? Compare the activity of sodium and iron with air, water and dilute acids.

Discussion

8725.	Give two tests for each of the following:(a) NH3(b) Oxygen(c) Water vapour
Answer» Give two tests for each of the following: (a) NH₃ (b) Oxygen (c) Water vapour

Discussion

8726.	What is the difference between a cation and an anion? How are they formed? Give the names and symbols of one cation and one anion.
Answer» What is the difference between a cation and an anion? How are they formed? Give the names and symbols of one cation and one anion.

Discussion

8727.	Which amongst the following contains triple bond?
Answer» Which amongst the following contains triple bond?

Discussion

8728.	how and why concentated tritium is about one atom per 10^{18} atoms of protium reseaon
Answer» how and why concentated tritium is about one atom per 10^{18} atoms of protium reseaon

Discussion

8729.	Question 45. A metal carbonate X on reacts with acid and gives a gas which when passed through a solution Y gives the carbonate back. On the other hand, a gas G that is obtained at the anode during electrolysis of brine is passed on dry Y, it gives a compound Z, used for disinfecting drinking water. Identify X, Y, G and Z.
Answer» Question 45. A metal carbonate X on reacts with acid and gives a gas which when passed through a solution Y gives the carbonate back. On the other hand, a gas G that is obtained at the anode during electrolysis of brine is passed on dry Y, it gives a compound Z, used for disinfecting drinking water. Identify X, Y, G and Z.

Discussion

8730.	90. In the compound &quotC&quoth3COCL which type of orbitals have been used by the indicated carbon(methyl) in Bond formation?
Answer» 90. In the compound "C"h3COCL which type of orbitals have been used by the indicated carbon(methyl) in Bond formation?

Discussion

8731.	illustrate the law of definite proportions from the following table 1)0.32 g of sulphur on burning in air produced 224 ml of SO2 at N.T.P. 2)a metal sulphite reacts with a mineral acid to give SO2gas which contains 50% of sulphur and 50% of oxygen
Answer» illustrate the law of definite proportions from the following table 1)0.32 g of sulphur on burning in air produced 224 ml of SO2 at N.T.P. 2)a metal sulphite reacts with a mineral acid to give SO2gas which contains 50% of sulphur and 50% of oxygen

Discussion

8732.	what is Vapour density of gaseous mixture?
Answer» what is Vapour density of gaseous mixture?

Discussion

8733.	Which of the following represents Claisen - Schmidt reaction
Answer» Which of the following represents Claisen - Schmidt reaction

Discussion

8734.	Acidic strength is maximum for1)o-aminophenol2)m-aminophenol3)p-aminophenol4)all have same pka
Answer» Acidic strength is maximum for 1)o-aminophenol 2)m-aminophenol 3)p-aminophenol 4)all have same pka

Discussion

8735.	Name: (a) a liquid non-metal, (b) a metal with dull appearance, (c) a metal with low melting and boiling points, (d) a non-metal with very high m.p & b.p., (e) a metal which can float on water, (f) a metal which can be cut with a knife, (g) a metal which is a bad conductor of heat and electricity, (h) a non-metal which is ductile, (i) a non-metal used in alloys. (j) a non-malleable metal. (k) two metalloids
Answer» Name: (a) a liquid non-metal, (b) a metal with dull appearance, (c) a metal with low melting and boiling points, (d) a non-metal with very high m.p & b.p., (e) a metal which can float on water, (f) a metal which can be cut with a knife, (g) a metal which is a bad conductor of heat and electricity, (h) a non-metal which is ductile, (i) a non-metal used in alloys. (j) a non-malleable metal. (k) two metalloids

8735.

Name: (a) a liquid non-metal, (b) a metal with dull appearance, (c) a metal with low melting and boiling points, (d) a non-metal with very high m.p & b.p., (e) a metal which can float on water, (f) a metal which can be cut with a knife, (g) a metal which is a bad conductor of heat and electricity, (h) a non-metal which is ductile, (i) a non-metal used in alloys. (j) a non-malleable metal. (k) two metalloids

Answer»

Name:

(a) a liquid non-metal,

(b) a metal with dull appearance,

(c) a metal with low melting and boiling points,

(d) a non-metal with very high m.p & b.p.,

(e) a metal which can float on water,

(f) a metal which can be cut with a knife,

(g) a metal which is a bad conductor of heat and electricity,

(h) a non-metal which is ductile,

(i) a non-metal used in alloys.

(j) a non-malleable metal.

(k) two metalloids

Discussion

8736.	CO2 is stored in extinguisher in liquid form ,but on coming out of it why does it change into gaseous form?
Answer» CO2 is stored in extinguisher in liquid form ,but on coming out of it why does it change into gaseous form?

Discussion

8737.	During electrolysis of aqueous NaOH, 4g of O2 gas is liberated at NTP at anode, H2 gas liberated at cathode is1)5.62)11.23)22.44)2.8
Answer» During electrolysis of aqueous NaOH, 4g of O2 gas is liberated at NTP at anode, H2 gas liberated at cathode is 1)5.6 2)11.2 3)22.4 4)2.8

Discussion

8738.	Conjugate base of H2PO−4 is:
Answer» Conjugate base of $H_{2} P O_{4}^{-}$ is:

Discussion

8739.	General configuration of outermost and penultimate shell is (n−1)s2 (n−1)p6 (n−1)dx ns2. If n = 4 and x = 5 then number of protons in the nucleus will be
Answer» General configuration of outermost and penultimate shell is $(n - 1) s^{2} (n - 1) p^{6} (n - 1) d^{x} n s^{2}$ . If n = 4 and x = 5 then number of protons in the nucleus will be

Discussion

8740.	What is anode mud? And what are it's uses?
Answer» What is anode mud? And what are it's uses?

Discussion

8741.	Consider a reaction 2NaCl+H_2SO_4→ Na_2SO4+2HCl (Salt cake) If 200 kgs of 80% pure salt s reacted with H_2SO_4 as per the reaction shown above , then what will be the amount of 90% pure salt cake that will be produced in the reaction ?
Answer» Consider a reaction 2NaCl+H_2SO_4→ Na_2SO4+2HCl (Salt cake) If 200 kgs of 80% pure salt s reacted with H_2SO_4 as per the reaction shown above , then what will be the amount of 90% pure salt cake that will be produced in the reaction ?

Discussion

8742.	(a) Calcium carbide is used for the artificial ripening of fruits. Actually the fruit ripens because of the heat evolved while calcium carbide reacts with moisture. During this reaction calcium hydroxide and acetylene gas is formed. If 200 cm3 of acetylene is formed from a certain mass of calcium carbide, find the volume of oxygen required and carbon dioxide formed during the complete combustion. The combustion reaction can be represented as below:2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g)(b) A gaseous compound of nitrogen and hydrogen contains 12.5% hydrogen by mass. Find the molecular formula of the compound if its relative molecular mass is 37.[N = 14, H = 1].
Answer» (a) Calcium carbide is used for the artificial ripening of fruits. Actually the fruit ripens because of the heat evolved while calcium carbide reacts with moisture. During this reaction calcium hydroxide and acetylene gas is formed. If 200 cm³ of acetylene is formed from a certain mass of calcium carbide, find the volume of oxygen required and carbon dioxide formed during the complete combustion. The combustion reaction can be represented as below: 2C₂H₂_(g)+ 5O₂_(g) → 4CO₂_(g) + 2H₂O_(g) (b) A gaseous compound of nitrogen and hydrogen contains 12.5% hydrogen by mass. Find the molecular formula of the compound if its relative molecular mass is 37. [N = 14, H = 1].

Discussion

8743.	Which of the following solutions will have pH close to 1.0?
Answer» Which of the following solutions will have pH close to 1.0?

Discussion

8744.

Write the IUPAC names of the following structural formulae. a. CH3-CH2-CH2-CH3 b. CH3-CHOH-CH3 c. CH3-CH2-COOH d. CH3-CH2-NH2 e. CH3-CHO f. CH3-CO-CH2-CH3

Answer» Write the IUPAC names of the following structural formulae.

a. CH₃-CH₂-CH₂-CH₃	b. CH₃-CHOH-CH₃
c. CH₃-CH₂-COOH	d. CH₃-CH₂-NH₂
e. CH₃-CHO	f. CH₃-CO-CH₂-CH₃

Discussion

8745.	Diaphragm, Cervical cap, and vaults are Reusable? Explain
Answer» Diaphragm, Cervical cap, and vaults are Reusable? Explain

Discussion

8746.	Question 13 Which among the following elements has the largest atomic radii? (a) Na (b) Mg (c) K (d) Ca
Answer» Question 13 Which among the following elements has the largest atomic radii? (a) Na (b) Mg (c) K (d) Ca

Discussion

8747.	A He+ ion is in its first excited state. Its ionization energy is-
Answer» A ${He}^{+}$ ion is in its first excited state. Its ionization energy is-

Discussion

8748.	Choose the correct statement(s) related to carbon: Statement 1: The chemical symbol for carbon is C. Statement 2: The atomic number of carbon is 6. Statement 3: It is metallic in nature. Statement 4: It is a member of group 14 on the periodic table.
Answer» Choose the correct statement(s) related to carbon: Statement 1: The chemical symbol for carbon is C. Statement 2: The atomic number of carbon is 6. Statement 3: It is metallic in nature. Statement 4: It is a member of group 14 on the periodic table.

8748.

Choose the correct statement(s) related to carbon: Statement 1: The chemical symbol for carbon is C. Statement 2: The atomic number of carbon is 6. Statement 3: It is metallic in nature. Statement 4: It is a member of group 14 on the periodic table.

Answer»

Choose the correct statement(s) related to carbon:

Statement 1: The chemical symbol for carbon is C.

Statement 2: The atomic number of carbon is 6.

Statement 3: It is metallic in nature.

Statement 4: It is a member of group 14 on the periodic table.

Discussion

8749.	Most of the metals are grey in colour; which one of the following is yellow?
Answer» Most of the metals are grey in colour; which one of the following is yellow?

Discussion

8750.	Why does the thickness of the depletion region in PN junction decreases with the increase in doping?
Answer» Why does the thickness of the depletion region in PN junction decreases with the increase in doping?

Discussion

Explore topic-wise InterviewSolutions in .

A compound H2X with molar weight of 80 g is dissolved in a solvent having density of 0.4 g mL−1. Assuming no change in volume upon dissolution, the molality of a 3.2 molar solution is ___

Why iron hydroxide is insoluble in water and why all bases are not alkali why why why😣😣

The condition in Boyle's law is that the ________ is constant.

Explain turbidity of water. How is turbidity measured? What causes water to become turbid? [3 MARKS]

Question 1 Did Dobereiner's triads also exist in the columns of Newlands' octaves? Compare and find out.

Calculate the percentage of Nitrogen in the fertilizer, Ammonium Nitrate NH4NO3 [H = 1, N = 14, O = 16]

Hydrochloric acid is prepared by dissolving _______ in water.

Which property of the polyvinyl chloride makes it suitable for coating of electrical wires in homes?

Question 9 Why are carbon and its compounds used as fuel for most applications?

Which of the following orders is correct for stability of these radicals?

In a hypothetical universe, if atomic numbers were used to form triads, which of the following will make triad with Na and K?

The total number of single bonds in a water molecule are:

Sort the elements which do not react with hot as well as cold water.Sodium, Potassium, Zinc and Iron.

The species undergoing oxidation acts as a _____ agent.

Addition of an electron to a neutral gaseous atom always leads to (i) Formation of an anion (ii) Liberation of energy (iii) Decrease in proton/electron ratio Are all these option correct?

An aquash solution of 6.3 gram of oxalic acid dihydrate is made upto 250 ml. The volume of 0.1 M NaOH required to completely neutralize 10 ml of this solution is what ?

Question 6Compounds such as alcohols and glucose also contain hydrogen but are not categorized as acids. Describe an activity to prove it.

34. Which of the following is not intramolecular redox reaction? 1) NH4NO2-------->N2+2H2O 2) 2Mn2O7--------->4MnO2+3O2 3) 2KClO3----------->2KCl+3O2 4) 2H2O2----------->2H2O+O2

52. give the hybridisation and shape of [Cu(NH3)4]2+

Bond length is defined as the "equilibrium dis†an ce" between the nuclei of bonded atoms in a molecule. what is the meaning of equilibrium dis†an ce

Which reaction does gay lussacs law is not applicable and why

What is meant by the activity series of metals? Compare the activity of sodium and iron with air, water and dilute acids.

Give two tests for each of the following:(a) NH3(b) Oxygen(c) Water vapour

What is the difference between a cation and an anion? How are they formed? Give the names and symbols of one cation and one anion.

Which amongst the following contains triple bond?

how and why concentated tritium is about one atom per 10^{18} atoms of protium reseaon

90. In the compound &quotC&quoth3COCL which type of orbitals have been used by the indicated carbon(methyl) in Bond formation?

illustrate the law of definite proportions from the following table 1)0.32 g of sulphur on burning in air produced 224 ml of SO2 at N.T.P. 2)a metal sulphite reacts with a mineral acid to give SO2gas which contains 50% of sulphur and 50% of oxygen

what is Vapour density of gaseous mixture?

Which of the following represents Claisen - Schmidt reaction

Acidic strength is maximum for1)o-aminophenol2)m-aminophenol3)p-aminophenol4)all have same pka

CO2 is stored in extinguisher in liquid form ,but on coming out of it why does it change into gaseous form?

During electrolysis of aqueous NaOH, 4g of O2 gas is liberated at NTP at anode, H2 gas liberated at cathode is1)5.62)11.23)22.44)2.8

Conjugate base of H2PO−4 is:

General configuration of outermost and penultimate shell is (n−1)s2 (n−1)p6 (n−1)dx ns2. If n = 4 and x = 5 then number of protons in the nucleus will be

What is anode mud? And what are it's uses?

Consider a reaction 2NaCl+H_2SO_4→ Na_2SO4+2HCl (Salt cake) If 200 kgs of 80% pure salt s reacted with H_2SO_4 as per the reaction shown above , then what will be the amount of 90% pure salt cake that will be produced in the reaction ?

Which of the following solutions will have pH close to 1.0?

Write the IUPAC names of the following structural formulae. a. CH3-CH2-CH2-CH3 b. CH3-CHOH-CH3 c. CH3-CH2-COOH d. CH3-CH2-NH2 e. CH3-CHO f. CH3-CO-CH2-CH3

Diaphragm, Cervical cap, and vaults are Reusable? Explain

Question 13 Which among the following elements has the largest atomic radii? (a) Na (b) Mg (c) K (d) Ca

A He+ ion is in its first excited state. Its ionization energy is-

Choose the correct statement(s) related to carbon: Statement 1: The chemical symbol for carbon is C. Statement 2: The atomic number of carbon is 6. Statement 3: It is metallic in nature. Statement 4: It is a member of group 14 on the periodic table.

Most of the metals are grey in colour; which one of the following is yellow?

Why does the thickness of the depletion region in PN junction decreases with the increase in doping?