15280 + Interview Questions in Chemistry Page 7 InterviewSolution

301.	The sketch below illustrates the refining of aluminium by Hoope's process.Figure(a) Which of A and B is the cathode and which one is the anode?(b) What is the electrolyte in the tank?(c) What material is used for the cathode?
Answer» The sketch below illustrates the refining of aluminium by Hoope's process. Figure (a) Which of A and B is the cathode and which one is the anode? (b) What is the electrolyte in the tank? (c) What material is used for the cathode?

Discussion

302.	Calculate volume of gases produced at stp at cathode and anode respectively during electrolysis of h2o by 10 faraday
Answer» Calculate volume of gases produced at stp at cathode and anode respectively during electrolysis of h2o by 10 faraday

Discussion

303.	What are ionic compound?
Answer» What are ionic compound?

Discussion

304.	If a cuboidal carton has length 80 cm, breadth 40 cm and height 60 cm, then the volume of the carton is .
Answer» If a cuboidal carton has length 80 cm, breadth 40 cm and height 60 cm, then the volume of the carton is .

Discussion

305.	Which gas is evolved when dilute hydrochloric acid reacts with zinc ? Write the molecular formula of the gas.
Answer» Which gas is evolved when dilute hydrochloric acid reacts with zinc ? Write the molecular formula of the gas.

Discussion

306.	At what temperature 10% (w/V) aqueous solution of glucose (mol mass is 180 g/mol) will exhibit an osomotic pressure of 16.42 atm?
Answer» At what temperature $10 % (w / V)$ aqueous solution of glucose (mol mass is 180 g/mol) will exhibit an osomotic pressure of $16.42 a t m$ ?

Discussion

307.	Can you please suggest me a project for my science fair.
Answer» Can you please suggest me a project for my science fair.

Discussion

308.	Question 2 Why does an aqueous solution of acid conduct electricity?
Answer» Question 2 Why does an aqueous solution of acid conduct electricity?

Discussion

309.	At which temperature will the volume of all gases reduce to zero will be
Answer» At which temperature will the volume of all gases reduce to zero will be

Discussion

310.	Show an activity to show reactivity of metals? Explain.
Answer» Show an activity to show reactivity of metals? Explain.

Discussion

311.	20.0 gram of magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 gram magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? 1) 60 2) 84 3) 75 4) 96
Answer» 20.0 gram of magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 gram magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? 1) 60 2) 84 3) 75 4) 96

Discussion

312.	alkyl aryl carbocation is more stable or aryl carbocation
Answer» alkyl aryl carbocation is more stable or aryl carbocation

Discussion

313.	HOW MUCH ELECTRICITY IS REQUIRED IN COULOMB FOR THE OXIDATION OF (1) 1MOL OF H2O TO O2.(2)1MOL OF FeO to Fe2O3
Answer» HOW MUCH ELECTRICITY IS REQUIRED IN COULOMB FOR THE OXIDATION OF (1) 1MOL OF H2O TO O2.(2)1MOL OF FeO to Fe2O3

Discussion

314.	At a low pressure, the curves of gas (A) adsorbed by a unit mass of a solid adsorbent (x/m vs P) at three different temperatures Tx ,Ty and Tz that have slopes 0.57 , 1 and 1.73 respectively. Which one of the following is correct?
Answer» At a low pressure, the curves of gas (A) adsorbed by a unit mass of a solid adsorbent ( $x / m v s P$ ) at three different temperatures $T_{x}, T_{y} a n d T_{z}$ that have slopes 0.57 , 1 and 1.73 respectively. Which one of the following is correct?

Discussion

315.	A biomolecule contains 2% magnesium by mass.The minimum molecular mass of biomolecule is(1) 1200 u(3) 2400 u(2) 1800u(4) 2000 u
Answer» A biomolecule contains 2% magnesium by mass.The minimum molecular mass of biomolecule is(1) 1200 u(3) 2400 u(2) 1800u(4) 2000 u

Discussion

316.	which one is more basic benzyl or tertiary alcoho
Answer» which one is more basic benzyl or tertiary alcoho

Discussion

317.	(a) What is the type of bonding expected in a metallic chloride?(b) If fused metallic chloride is electrolysed, at which electrode would the metal be obtained?(c) What metallic property is shown by the non-metal graphite?
Answer» (a) What is the type of bonding expected in a metallic chloride? (b) If fused metallic chloride is electrolysed, at which electrode would the metal be obtained? (c) What metallic property is shown by the non-metal graphite?

Discussion

318.	Balance the following equations: [2 MARKS]1. FeCl3 + NH4OH → Fe(OH)3 + NH4Cl2. Na2S2O3 + I2 → Na2S4O6 + NaI
Answer» Balance the following equations: [2 MARKS] 1. FeCl₃ + NH₄OH → Fe(OH)₃ + NH₄Cl 2. Na₂S₂O₃ + I₂ → Na₂S₄O₆ + NaI

Discussion

319.	22. The value Kp for the reaction 2SO2(g) +O2=2SO3(g) is 5. What will be the partial pressure of O2 at equilibrium when equal moles of SO2 and SO3 are present at equilibrium?
Answer» 22. The value Kp for the reaction 2SO2(g) +O2=2SO3(g) is 5. What will be the partial pressure of O2 at equilibrium when equal moles of SO2 and SO3 are present at equilibrium?

Discussion

320.	68. Enthalpy of neutralization of H3 PO3 acid is-106.68 kJ/mol using NaOH. If enthalpy ofneutralization of HCI by NaOH is -55.84 kJ/molCalculate Δ Η,ionization of H3PO, into its ions:
Answer» 68. Enthalpy of neutralization of H3 PO3 acid is-106.68 kJ/mol using NaOH. If enthalpy ofneutralization of HCI by NaOH is -55.84 kJ/molCalculate Δ Η,ionization of H3PO, into its ions:

Discussion

321.	wh is ment by amphoteric oxide?
Answer» wh is ment by amphoteric oxide?

Discussion

322.	Which ingredients make baking powder?
Answer» Which ingredients make baking powder?

Discussion

323.	KBr (potassium bromide) contains 32.9% by weight of potassium. if 6.40 g of bromine reacts with 3.60 g of potassium, calculate the number of moles of potassium which combine with bromine to form KBr.
Answer» KBr (potassium bromide) contains 32.9% by weight of potassium. if 6.40 g of bromine reacts with 3.60 g of potassium, calculate the number of moles of potassium which combine with bromine to form KBr.

Discussion

324.	A gaseous hydrocarbon (12mL) is exploded with excess of oxygen.On cooling the contraction in volume is 48mL and their is further contraction of 48mL in volume when passed through lime water. The molecular formula of hydrocarbon is
Answer» A gaseous hydrocarbon (12mL) is exploded with excess of oxygen.On cooling the contraction in volume is 48mL and their is further contraction of 48mL in volume when passed through lime water. The molecular formula of hydrocarbon is

Discussion

325.	An oxide act as a base when it reacts with an acid and acts as an acid when it reacts with a base. Identify the type of oxide.
Answer» An oxide act as a base when it reacts with an acid and acts as an acid when it reacts with a base. Identify the type of oxide.

Discussion

326.	What is the nature of the bonding in Phosphorus tri-chloride?
Answer» What is the nature of the bonding in Phosphorus tri-chloride?

Discussion

327.	Name one metal each occurring as a(a) sulphide ore(b) halide ore(c) carbonate ore(d) oxide ore
Answer» Name one metal each occurring as a (a) sulphide ore (b) halide ore (c) carbonate ore (d) oxide ore

Discussion

328.	Draw the structure of an aromatic compound having molecular formula C12O9.
Answer» Draw the structure of an aromatic compound having molecular formula C12O9.

Discussion

329.	Which one of the following compounds shows the presence of intramolecular hydrogen bond? a. H_2O_2 b. HCN c. Cellulose d. Concentrated acetic acid Explain all options.
Answer» Which one of the following compounds shows the presence of intramolecular hydrogen bond? a. H_2O_2 b. HCN c. Cellulose d. Concentrated acetic acid Explain all options.

Discussion

330.	For the hydrogen atom, the energy of the electron is defined by the factor En=−13.58/n2 eV. Here n is positive integer.The minimum amount of energy that can be absorbed by hydrogen atom in its ground state is:
Answer» For the hydrogen atom, the energy of the electron is defined by the factor $E_{n} = - 13.58 / n^{2} eV$ . Here n is positive integer. The minimum amount of energy that can be absorbed by hydrogen atom in its ground state is:

Discussion

331.	A fruit juice is tested for its pH value. What could be its possible pH if the colour is changed to yellow?
Answer» A fruit juice is tested for its pH value. What could be its possible pH if the colour is changed to yellow?

Discussion

332.	A more reactive metal displaces a less reactive metal from the aqueous solution. From the following set tell which one represents a correct picture, of both the possible (√) reaction and impossible (x) reactions between metals and the solution of different salts.
Answer» A more reactive metal displaces a less reactive metal from the aqueous solution. From the following set tell which one represents a correct picture, of both the possible (√) reaction and impossible (x) reactions between metals and the solution of different salts.

Discussion

333.	1. the formation of crystals of substance from its hot saturated solution is known as crystallization is this statement correct? ________________________________________________ II Multiple choice question 2. Which of the following sinks in water a. Calcium b. Sodium c. Potassium d. Mono of these
Answer» 1. the formation of crystals of substance from its hot saturated solution is known as crystallization is this statement correct? ________________________________________________ II Multiple choice question 2. Which of the following sinks in water a. Calcium b. Sodium c. Potassium d. Mono of these

333.

1. the formation of crystals of substance from its hot saturated solution is known as crystallization is this statement correct? ________________________________________________ II Multiple choice question 2. Which of the following sinks in water a. Calcium b. Sodium c. Potassium d. Mono of these

Answer»

1. the formation of crystals of substance from its hot saturated solution is known as crystallization is this statement correct?

________________________________________________

II Multiple choice question

2. Which of the following sinks in water

a. Calcium

b. Sodium

c. Potassium

d. Mono of these

Discussion

334.	64. how many atoms of oxygen and hydrogen arepresent in o.15 mole of water?
Answer» 64. how many atoms of oxygen and hydrogen arepresent in o.15 mole of water?

Discussion

335.	Which of the following is used in the contact tower?
Answer» Which of the following is used in the contact tower?

Discussion

336.	ABCD is a square, X and Y are the points on sides AD and BC respectively such that AY = BX, then
Answer» ABCD is a square, X and Y are the points on sides AD and BC respectively such that AY = BX, then

336.

ABCD is a square, X and Y are the points on sides AD and BC respectively such that AY = BX, then

Answer»

ABCD is a square, X and Y are the points on sides AD and BC respectively such that AY = BX, then

Discussion

337.	The energy of an electron in a hydrogen atom in the nth orbit is En. Then, the energy in the nth orbit of double ionized helium atom will be
Answer» The energy of an electron in a hydrogen atom in the $n^{t h}$ orbit is $E_{n}$ . Then, the energy in the $n^{t h}$ orbit of double ionized helium atom will be

Discussion

338.	The pressure of a gas filled in a closed jar increases by 0.2% when temperature is increased by 2 degree celsius . Find the initial temperature of the gas
Answer» The pressure of a gas filled in a closed jar increases by 0.2% when temperature is increased by 2 degree celsius . Find the initial temperature of the gas

Discussion

339.	Increasing order of electronegativity is:
Answer» Increasing order of electronegativity is:

Discussion

340.	in conversion of benzene to 4-chloro-1-nitrobenzene (reagent used is 1.cl2/fecl3 2.conc.hno3+conc h2so4) and in conversion of benzene to 1-bromo-3 -nitrobenzene(reagent used is 1.conc hno3+conc h2so4 2.br2/fe) , why ha\log een occupy different position in both case(para in 1st and meta in 2nd case) ??explain
Answer» in conversion of benzene to 4-chloro-1-nitrobenzene (reagent used is 1.cl2/fecl3 2.conc.hno3+conc h2so4) and in conversion of benzene to 1-bromo-3 -nitrobenzene(reagent used is 1.conc hno3+conc h2so4 2.br2/fe) , why ha\log een occupy different position in both case(para in 1st and meta in 2nd case) ??explain

Discussion

341.	a metal nitrate M3N2 contains 28% of nitrogen the atomic mass of metal M is
Answer» a metal nitrate M3N2 contains 28% of nitrogen the atomic mass of metal M is

Discussion

342.	The equivalent conductivity of H2SO4 solution is 1.3×102 ohm−1 cm2 eq−1. If its specific conductance is 26×10−2 ohm−1cm−1, then concentration of H2SO4 solution is :
Answer» The equivalent conductivity of $H_{2} S O_{4}$ solution is $1.3 \times 10^{2} {ohm}^{- 1} {cm}^{2} {eq}^{- 1}$ . If its specific conductance is $26 \times 10^{- 2} {ohm}^{- 1} {cm}^{- 1}$ , then concentration of $H_{2} S O_{4}$ solution is :

Discussion

343.	Correct arrangement of the following nucleophiles in the order of their nucleophilic strength is:
Answer» Correct arrangement of the following nucleophiles in the order of their nucleophilic strength is:

Discussion

344.	12. The pKb of fluride ion at 25^° C is 10.83.the ionisation constant of hydrofluric acid is
Answer» 12. The pKb of fluride ion at 25^° C is 10.83.the ionisation constant of hydrofluric acid is

Discussion

345.	What's the packing efficiency of HCP?
Answer» What's the packing efficiency of HCP?

Discussion

346.	Analysis shows that a metal oxide has empirical formula M_{0.96 }O_{1.00}. Calculate % of M^{2+}and M^{3+}ions in the sample.
Answer» Analysis shows that a metal oxide has empirical formula M_{0.96 }O_{1.00}. Calculate % of M^{2+}and M^{3+}ions in the sample.

Discussion

347.	An alkali is titrated against an acid with given below indicator, which of the following is a correct combination?
Answer» An alkali is titrated against an acid with given below indicator, which of the following is a correct combination?

Discussion

348.	Question 9Why 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

349.	What is symbol of mercury
Answer» What is symbol of mercury

Discussion

350.	(a) Define the Law of constant proportion by giving one example.(b) In an experiment, 1.288 g of copper oxide was obtained from 1.03 g of Cu. In another experiment, 3.672 g of copper oxide gave a reduction of 2.938 g of copper. Which law of chemical combination can be derived by this example?
Answer» (a) Define the Law of constant proportion by giving one example. (b) In an experiment, 1.288 g of copper oxide was obtained from 1.03 g of Cu. In another experiment, 3.672 g of copper oxide gave a reduction of 2.938 g of copper. Which law of chemical combination can be derived by this example?

Discussion

Explore topic-wise InterviewSolutions in .

The sketch below illustrates the refining of aluminium by Hoope's process.Figure(a) Which of A and B is the cathode and which one is the anode?(b) What is the electrolyte in the tank?(c) What material is used for the cathode?

Calculate volume of gases produced at stp at cathode and anode respectively during electrolysis of h2o by 10 faraday

What are ionic compound?

If a cuboidal carton has length 80 cm, breadth 40 cm and height 60 cm, then the volume of the carton is .

Which gas is evolved when dilute hydrochloric acid reacts with zinc ? Write the molecular formula of the gas.

At what temperature 10% (w/V) aqueous solution of glucose (mol mass is 180 g/mol) will exhibit an osomotic pressure of 16.42 atm?

Can you please suggest me a project for my science fair.

Question 2 Why does an aqueous solution of acid conduct electricity?

At which temperature will the volume of all gases reduce to zero will be

Show an activity to show reactivity of metals? Explain.

20.0 gram of magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 gram magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? 1) 60 2) 84 3) 75 4) 96

alkyl aryl carbocation is more stable or aryl carbocation

HOW MUCH ELECTRICITY IS REQUIRED IN COULOMB FOR THE OXIDATION OF (1) 1MOL OF H2O TO O2.(2)1MOL OF FeO to Fe2O3

At a low pressure, the curves of gas (A) adsorbed by a unit mass of a solid adsorbent (x/m vs P) at three different temperatures Tx ,Ty and Tz that have slopes 0.57 , 1 and 1.73 respectively. Which one of the following is correct?

A biomolecule contains 2% magnesium by mass.The minimum molecular mass of biomolecule is(1) 1200 u(3) 2400 u(2) 1800u(4) 2000 u

which one is more basic benzyl or tertiary alcoho

(a) What is the type of bonding expected in a metallic chloride?(b) If fused metallic chloride is electrolysed, at which electrode would the metal be obtained?(c) What metallic property is shown by the non-metal graphite?

Balance the following equations: [2 MARKS]1. FeCl3 + NH4OH → Fe(OH)3 + NH4Cl2. Na2S2O3 + I2 → Na2S4O6 + NaI

22. The value Kp for the reaction 2SO2(g) +O2=2SO3(g) is 5. What will be the partial pressure of O2 at equilibrium when equal moles of SO2 and SO3 are present at equilibrium?

68. Enthalpy of neutralization of H3 PO3 acid is-106.68 kJ/mol using NaOH. If enthalpy ofneutralization of HCI by NaOH is -55.84 kJ/molCalculate Δ Η,ionization of H3PO, into its ions:

wh is ment by amphoteric oxide?

Which ingredients make baking powder?

KBr (potassium bromide) contains 32.9% by weight of potassium. if 6.40 g of bromine reacts with 3.60 g of potassium, calculate the number of moles of potassium which combine with bromine to form KBr.

A gaseous hydrocarbon (12mL) is exploded with excess of oxygen.On cooling the contraction in volume is 48mL and their is further contraction of 48mL in volume when passed through lime water. The molecular formula of hydrocarbon is

An oxide act as a base when it reacts with an acid and acts as an acid when it reacts with a base. Identify the type of oxide.

What is the nature of the bonding in Phosphorus tri-chloride?

Name one metal each occurring as a(a) sulphide ore(b) halide ore(c) carbonate ore(d) oxide ore

Draw the structure of an aromatic compound having molecular formula C12O9.

Which one of the following compounds shows the presence of intramolecular hydrogen bond? a. H_2O_2 b. HCN c. Cellulose d. Concentrated acetic acid Explain all options.

For the hydrogen atom, the energy of the electron is defined by the factor En=−13.58/n2 eV. Here n is positive integer.The minimum amount of energy that can be absorbed by hydrogen atom in its ground state is:

A fruit juice is tested for its pH value. What could be its possible pH if the colour is changed to yellow?

A more reactive metal displaces a less reactive metal from the aqueous solution. From the following set tell which one represents a correct picture, of both the possible (√) reaction and impossible (x) reactions between metals and the solution of different salts.

1. the formation of crystals of substance from its hot saturated solution is known as crystallization is this statement correct? ________________________________________________ II Multiple choice question 2. Which of the following sinks in water a. Calcium b. Sodium c. Potassium d. Mono of these

64. how many atoms of oxygen and hydrogen arepresent in o.15 mole of water?

Which of the following is used in the contact tower?

ABCD is a square, X and Y are the points on sides AD and BC respectively such that AY = BX, then

The energy of an electron in a hydrogen atom in the nth orbit is En. Then, the energy in the nth orbit of double ionized helium atom will be

The pressure of a gas filled in a closed jar increases by 0.2% when temperature is increased by 2 degree celsius . Find the initial temperature of the gas

Increasing order of electronegativity is:

a metal nitrate M3N2 contains 28% of nitrogen the atomic mass of metal M is

The equivalent conductivity of H2SO4 solution is 1.3×102 ohm−1 cm2 eq−1. If its specific conductance is 26×10−2 ohm−1cm−1, then concentration of H2SO4 solution is :

Correct arrangement of the following nucleophiles in the order of their nucleophilic strength is:

12. The pKb of fluride ion at 25^° C is 10.83.the ionisation constant of hydrofluric acid is

What's the packing efficiency of HCP?

Analysis shows that a metal oxide has empirical formula M_{0.96 }O_{1.00}. Calculate % of M^{2+}and M^{3+}ions in the sample.

An alkali is titrated against an acid with given below indicator, which of the following is a correct combination?

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

What is symbol of mercury

(a) Define the Law of constant proportion by giving one example.(b) In an experiment, 1.288 g of copper oxide was obtained from 1.03 g of Cu. In another experiment, 3.672 g of copper oxide gave a reduction of 2.938 g of copper. Which law of chemical combination can be derived by this example?