15280 + Interview Questions in Chemistry Page 85 InterviewSolution

4201.	KMnO4 acts as an oxidant in neutral, basic and acidic medium. Its final product under these conditions would be respectively:
Answer» $K M n O_{4}$ acts as an oxidant in neutral, basic and acidic medium. Its final product under these conditions would be respectively:

Discussion

4202.	Complétez avec l'artoicle indéfini.
Answer» Complétez avec l'artoicle indéfini.

Discussion

4203.	If S†an dard reduction potential of V is -1.87V and that of Cr is -0.41 V , then V^{3+ }is more stable or Cr^{3+} ?
Answer» If S†an dard reduction potential of V is -1.87V and that of Cr is -0.41 V , then V^{3+ }is more stable or Cr^{3+} ?

Discussion

4204.	What is the order of boiling point for the given isomeric amines?
Answer» What is the order of boiling point for the given isomeric amines?

Discussion

4205.	Question 16.2Explain the following in terms of gain or loss of oxygen with an examples: Reduction.
Answer» Question 16.2 Explain the following in terms of gain or loss of oxygen with an examples: Reduction.

Discussion

4206.	Which pollutant released into the air during refrigeration and airconditioning is the greatest contributor to the depletion of ozone layer ? (a) BHC (b) DDT (c) CFC (d) UNEP
Answer» Which pollutant released into the air during refrigeration and airconditioning is the greatest contributor to the depletion of ozone layer ? (a) BHC (b) DDT (c) CFC (d) UNEP

4206.

Which pollutant released into the air during refrigeration and airconditioning is the greatest contributor to the depletion of ozone layer ? (a) BHC (b) DDT (c) CFC (d) UNEP

Answer»

Which pollutant released into the air during refrigeration and airconditioning is the greatest contributor to the depletion of ozone layer ?

(a) BHC (b) DDT (c) CFC (d) UNEP

Discussion

4207.	Evaluate using formula:(a) 5C3(b) 7C2
Answer» Evaluate using formula: (a) ⁵C₃ (b) ⁷C₂

4207.

Evaluate using formula:(a) 5C3(b) 7C2

Answer»

Evaluate using formula:

(a) ⁵C₃

(b) ⁷C₂

Discussion

4208.	Why covalent bond have low melting point
Answer» Why covalent bond have low melting point

Discussion

4209.	69. Hydrazine can be used in fuel cell N2H4(aq) + O2(g) -------N2(g) +2H2O(l) If Δ G^° for this reaction is -600 kJ,what will be the E^° for the cell? (1) 1.25V (2) 1.50V (3) 1.57V (4) 1.75V
Answer» 69. Hydrazine can be used in fuel cell N2H4(aq) + O2(g) -------N2(g) +2H2O(l) If Δ G^° for this reaction is -600 kJ,what will be the E^° for the cell? (1) 1.25V (2) 1.50V (3) 1.57V (4) 1.75V

Discussion

4210.	Which is the lightest and the most abundant element in the universe?
Answer» Which is the lightest and the most abundant element in the universe?

Discussion

4211.	An element 'X' belongs to period "3" and group "16" of the Modern Periodic Table. (a) Determine the number of valence electrons and the valency of 'X'. (b) Molecular formula of the compound when 'X' reacts with hydrogen and write its electron dot structure. (c) Name the element 'X' and state whether it is metallic or non-metallic.
Answer» An element 'X' belongs to period "3" and group "16" of the Modern Periodic Table. (a) Determine the number of valence electrons and the valency of 'X'. (b) Molecular formula of the compound when 'X' reacts with hydrogen and write its electron dot structure. (c) Name the element 'X' and state whether it is metallic or non-metallic.

Discussion

4212.	DOES ONLY COVALENT COMPOUND DISSOLVE IN ORGANIC SOLVENT? WHY ??WHY NOT IONIC COMPOUND?
Answer» DOES ONLY COVALENT COMPOUND DISSOLVE IN ORGANIC SOLVENT? WHY ??WHY NOT IONIC COMPOUND?

Discussion

4213.	Arrange single, double and triple bonds in decreasing order of their strengths.
Answer» Arrange single, double and triple bonds in decreasing order of their strengths.

Discussion

4214.	NBS is used for brominating allylic carbon atom. Predict the product in the following reaction.
Answer» NBS is used for brominating allylic carbon atom. Predict the product in the following reaction.

Discussion

4215.	If the vapour density of a volatile chloride of divalent metal is 59.5 and equivalent mass of the metal is
Answer» If the vapour density of a volatile chloride of divalent metal is 59.5 and equivalent mass of the metal is

Discussion

4216.	The cork ball played in the cricket has diameter of 7 cm .The density of cork used is 0.56 gm per cm3 .Calculate the weight of the ball.
Answer» The cork ball played in the cricket has diameter of 7 cm .The density of cork used is 0.56 gm per ${c m}^{3}$ .Calculate the weight of the ball.

Discussion

4217.	Question 03. During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to (a) absorb the evolved gas (b) moisten the gas (c) absorb moisture from the gas (d) absorb Cl− ions from the evolved gas
Answer» Question 03. During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to (a) absorb the evolved gas (b) moisten the gas (c) absorb moisture from the gas (d) absorb ${Cl}^{-}$ ions from the evolved gas

Discussion

4218.	Is glucose an acid or a base. Explain
Answer» Is glucose an acid or a base. Explain

Discussion

4219.	The analysis of a fuel is found to have carbon 86%, hydrogen 5%, oxygen 2%, sulphur 0.5% by weight and the remainder is nitrogen.The stoichiometric air fuel ratio is ____.(Assume that air contains 23% O2 by mass)11.64
Answer» The analysis of a fuel is found to have carbon 86%, hydrogen 5%, oxygen 2%, sulphur 0.5% by weight and the remainder is nitrogen. The stoichiometric air fuel ratio is ____. (Assume that air contains 23% $O_{2}$ by mass) 11.64

4219.

The analysis of a fuel is found to have carbon 86%, hydrogen 5%, oxygen 2%, sulphur 0.5% by weight and the remainder is nitrogen.The stoichiometric air fuel ratio is ____.(Assume that air contains 23% O2 by mass)11.64

Answer»

The analysis of a fuel is found to have carbon 86%, hydrogen 5%, oxygen 2%, sulphur 0.5% by weight and the remainder is nitrogen.

The stoichiometric air fuel ratio is ____.

(Assume that air contains 23% $O_{2}$ by mass)

11.64

Discussion

4220.	In a food chain, the initial organism is usually : (a) photosynthetic (b) herbivore (c) saprophytic (d) parasitic.
Answer» In a food chain, the initial organism is usually : (a) photosynthetic (b) herbivore (c) saprophytic (d) parasitic.

4220.

In a food chain, the initial organism is usually : (a) photosynthetic (b) herbivore (c) saprophytic (d) parasitic.

Answer»

In a food chain, the initial organism is usually :

(a) photosynthetic

(b) herbivore

(c) saprophytic

(d) parasitic.

Discussion

4221.	What happens when zinc carbonate is heated?
Answer» What happens when zinc carbonate is heated?

Discussion

4222.	Name(a) a metallic hydroxide soluble in excess of NH4OH.(b) a metallic oxide soluble in excess of caustic soda solution.(c) a strong alkali(d) a weak alkali(e) two coloured metal ions.(f) two bases which are not alkalis but dissolve in strong alkalis.(g) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
Answer» Name (a) a metallic hydroxide soluble in excess of NH₄OH. (b) a metallic oxide soluble in excess of caustic soda solution. (c) a strong alkali (d) a weak alkali (e) two coloured metal ions. (f) two bases which are not alkalis but dissolve in strong alkalis. (g) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Discussion

4223.	Write a brief note on bauxite.
Answer» Write a brief note on bauxite.

Discussion

4224.	Out of the following, which set of hydrocarbons undergo addition reactions?C2H6, C3H8, C3H6, C2H2, CH4
Answer» Out of the following, which set of hydrocarbons undergo addition reactions? $C_{2} H_{6}, C_{3} H_{8}, C_{3} H_{6}, C_{2} H_{2}, C H_{4}$

Discussion

4225.	When we write the definition for metals we say every thing that produces positive ions (except than hydrogen) by losing electron And for non-metals we write the opposite but still the Hydrogen is exceptional element.Why such happens?
Answer» When we write the definition for metals we say every thing that produces positive ions (except than hydrogen) by losing electron And for non-metals we write the opposite but still the Hydrogen is exceptional element.Why such happens?

Discussion

4226.	calcium carbonate react with HCl to give cacl2 + CO2 according to the reaction caco3 +2 HCL gives rise to cacl2 + CO2 + H2O .what mass of 20% caco3 is required to react completely with 250 ml of 0.50 M HCL
Answer» calcium carbonate react with HCl to give cacl2 + CO2 according to the reaction caco3 +2 HCL gives rise to cacl2 + CO2 + H2O .what mass of 20% caco3 is required to react completely with 250 ml of 0.50 M HCL

Discussion

4227.	The molecular formula of the given compound is ________.
Answer» The molecular formula of the given compound is ________.

Discussion

4228.	(i) What is the purpose of the contact process?(ii) Name the two gases that are combined during the contact process.(iii) Name the catalyst used in the process.(iv) Write the equation for the reaction between zinc and the final product of the contact process.
Answer» (i) What is the purpose of the contact process? (ii) Name the two gases that are combined during the contact process. (iii) Name the catalyst used in the process. (iv) Write the equation for the reaction between zinc and the final product of the contact process.

Discussion

4229.

(a) The table below compares some properties of metals and non-metals. Write down the missing statement (i) to (iv): Metal Non-metal (i) Malleable Form positive ions. (iv) Poor conductors of heat (ii) (iii) Form acidic oxides

Answer» (a) The table below compares some properties of metals and non-metals. Write down the missing statement (i) to (iv):

Metal	Non-metal
(i) Malleable Form positive ions. (iv)	Poor conductors of heat (ii) (iii) Form acidic oxides

Discussion

4230.	Question 6 (b)Give reasons for the following.Immersion rods for heating liquids are made up of metallic substances.
Answer» Question 6 (b) Give reasons for the following. Immersion rods for heating liquids are made up of metallic substances.

Discussion

4231.	The symbols given below represents the nuclei of radioactive elements. Which among the following are isotopes? 23091W , 23592X , 23893Y , 23892Z
Answer» The symbols given below represents the nuclei of radioactive elements. Which among the following are isotopes? $_{91}^{230} W$ , $_{92}^{235} X$ , $_{93}^{238} Y$ , $_{92}^{238} Z$

4231.

The symbols given below represents the nuclei of radioactive elements. Which among the following are isotopes? 23091W , 23592X , 23893Y , 23892Z

Answer»

The symbols given below represents the nuclei of radioactive elements. Which among the following are isotopes?

$_{91}^{230} W$ , $_{92}^{235} X$ , $_{93}^{238} Y$ , $_{92}^{238} Z$

Discussion

4232.	Vous allez à la gare de Lyon pour acheter des billets pour Marseille. Rédigez le dialogue entre vous et l'employé.
Answer» Vous allez à la gare de Lyon pour acheter des billets pour Marseille. Rédigez le dialogue entre vous et l'employé.

Discussion

4233.	The standard temperature and pressure values are:
Answer» The standard temperature and pressure values are:

Discussion

4234.	The equivalent wt of metal is 16. Vapour density of its chloride is 77.25. Then atomic mass of metal is
Answer» The equivalent wt of metal is 16. Vapour density of its chloride is 77.25. Then atomic mass of metal is

Discussion

4235.	The authorised capital of Suhas Ltd is Rs 50,000 divided into 25000 shares of Rs 200 each. Out of these, the company issued 12000 shares of Rs 200 each at premium of 10%. The amount per share was payable as follows: Rs 60 on application, Rs 60 on allotment (including premium) Rs 30 on first call and balance on final call. Public application for 11000 shares, All the money was duly received. Prepare an extract of Balance Sheet of Suhas Ltd as per Revised Schedule III of the Companies Act 2013, disclosing the above information. Also prepare notes to accounts for the same.
Answer» The authorised capital of Suhas Ltd is Rs 50,000 divided into 25000 shares of Rs 200 each. Out of these, the company issued 12000 shares of Rs 200 each at premium of 10%. The amount per share was payable as follows: Rs 60 on application, Rs 60 on allotment (including premium) Rs 30 on first call and balance on final call. Public application for 11000 shares, All the money was duly received. Prepare an extract of Balance Sheet of Suhas Ltd as per Revised Schedule III of the Companies Act 2013, disclosing the above information. Also prepare notes to accounts for the same.

4235.

The authorised capital of Suhas Ltd is Rs 50,000 divided into 25000 shares of Rs 200 each. Out of these, the company issued 12000 shares of Rs 200 each at premium of 10%. The amount per share was payable as follows: Rs 60 on application, Rs 60 on allotment (including premium) Rs 30 on first call and balance on final call. Public application for 11000 shares, All the money was duly received. Prepare an extract of Balance Sheet of Suhas Ltd as per Revised Schedule III of the Companies Act 2013, disclosing the above information. Also prepare notes to accounts for the same.

Answer»

The authorised capital of Suhas Ltd is Rs 50,000 divided into 25000 shares of Rs 200 each. Out of these, the company issued 12000 shares of Rs 200 each at premium of 10%. The amount per share was payable as follows:

Rs 60 on application,

Rs 60 on allotment (including premium)

Rs 30 on first call and balance on final call.

Public application for 11000 shares, All the money was duly received. Prepare an extract of Balance Sheet of Suhas Ltd as per Revised Schedule III of the Companies Act 2013, disclosing the above information. Also prepare notes to accounts for the same.

Discussion

4236.	Reduction involves
Answer» Reduction involves

Discussion

4237.	Which of the following is not deliquescent substance:-
Answer» Which of the following is not deliquescent substance:-

Discussion

4238.	Two closed vessel A and B of equal volumecontaining air at pressure P, and temperature Tare connected to each other through a narrow opentube. If the temperature of one is now maintainedat T, and other at T2 (where T, > T2) then thatwhat will be the final pressure?2PIT2(1)2P T2(2)(D)1-11
Answer» Two closed vessel A and B of equal volumecontaining air at pressure P, and temperature Tare connected to each other through a narrow opentube. If the temperature of one is now maintainedat T, and other at T2 (where T, > T2) then thatwhat will be the final pressure?2PIT2(1)2P T2(2)(D)1-11

Discussion

4239.	Which of the following is position isomer of?
Answer» Which of the following is position isomer of?

4239.

Which of the following is position isomer of?

Answer»

Which of the following is position isomer of?

Discussion

4240.	Which of the following reaction correctly represents the oxidation process of Galvanic cell?
Answer» Which of the following reaction correctly represents the oxidation process of Galvanic cell?

Discussion

4241.	Which of the following compounds of carbon is soluble in water?
Answer» Which of the following compounds of carbon is soluble in water?

Discussion

4242.	Which of the following is called as strategic metal?
Answer» Which of the following is called as strategic metal?

Discussion

4243.	How to calculate atomic mass of an element ?
Answer» How to calculate atomic mass of an element ?

Discussion

4244.	From amongst the metals sodium, calcium, aluminium, copper and magnesium, name the metal (i) which reacts with water only on boiling, and (ii) another which does not react even with steam.
Answer» From amongst the metals sodium, calcium, aluminium, copper and magnesium, name the metal (i) which reacts with water only on boiling, and (ii) another which does not react even with steam.

Discussion

4245.	In a food chain consisting of grass, frog, bird, and insects, where will the concentration of the harmful chemicals be maximum?
Answer» In a food chain consisting of grass, frog, bird, and insects, where will the concentration of the harmful chemicals be maximum?

Discussion

4246.	Observe the table and identify metals and non-metals. Select the correct option. Sl.NoSet-1Set-21.Sodium (Na)Oxygen (O)2.Magnesium (Mg)Chlorine (Cl)3.Iron (Fe)Nitrogen (N)4.Gold (Au)Sulphur (S)5.Calcium (Ca)Carbon (C)
Answer» Observe the table and identify metals and non-metals. Select the correct option. $\begin{matrix} Sl.No & Set-1 & Set-2 1. & Sodium (Na) & Oxygen (O) 2. & Magnesium (Mg) & Chlorine (Cl) 3. & Iron (Fe) & Nitrogen (N) 4. & Gold (Au) & Sulphur (S) 5. & Calcium (Ca) & Carbon (C) \end{matrix}$

Discussion

4247.	The number of orbital with n=5,m,=+2 is/are: (Round off to the Nearest Integer)
Answer» The number of orbital with $n = 5, m, = + 2$ is/are: (Round off to the Nearest Integer)

Discussion

4248.	The difference in number of water molecules in gypsum and plaster of paris is:
Answer» The difference in number of water molecules in gypsum and plaster of paris is:

Discussion

4249.	Name an allotrope of carbon which contains both single and double bonds between carbon atoms.
Answer» Name an allotrope of carbon which contains both single and double bonds between carbon atoms.

Discussion

4250.

Which species has the maximum number of lone pair of electrons on the central atom?

Answer»

Which species has the maximum number of lone pair of electrons on the central atom?

Discussion

Explore topic-wise InterviewSolutions in .

KMnO4 acts as an oxidant in neutral, basic and acidic medium. Its final product under these conditions would be respectively:

Complétez avec l'artoicle indéfini.

If S†an dard reduction potential of V is -1.87V and that of Cr is -0.41 V , then V^{3+ }is more stable or Cr^{3+} ?

What is the order of boiling point for the given isomeric amines?

Question 16.2Explain the following in terms of gain or loss of oxygen with an examples: Reduction.

Which pollutant released into the air during refrigeration and airconditioning is the greatest contributor to the depletion of ozone layer ? (a) BHC (b) DDT (c) CFC (d) UNEP

Evaluate using formula:(a) 5C3(b) 7C2

Why covalent bond have low melting point

69. Hydrazine can be used in fuel cell N2H4(aq) + O2(g) -------N2(g) +2H2O(l) If Δ G^° for this reaction is -600 kJ,what will be the E^° for the cell? (1) 1.25V (2) 1.50V (3) 1.57V (4) 1.75V

Which is the lightest and the most abundant element in the universe?

DOES ONLY COVALENT COMPOUND DISSOLVE IN ORGANIC SOLVENT? WHY ??WHY NOT IONIC COMPOUND?

Arrange single, double and triple bonds in decreasing order of their strengths.

NBS is used for brominating allylic carbon atom. Predict the product in the following reaction.

If the vapour density of a volatile chloride of divalent metal is 59.5 and equivalent mass of the metal is

The cork ball played in the cricket has diameter of 7 cm .The density of cork used is 0.56 gm per cm3 .Calculate the weight of the ball.

Is glucose an acid or a base. Explain

The analysis of a fuel is found to have carbon 86%, hydrogen 5%, oxygen 2%, sulphur 0.5% by weight and the remainder is nitrogen.The stoichiometric air fuel ratio is ____.(Assume that air contains 23% O2 by mass)11.64

In a food chain, the initial organism is usually : (a) photosynthetic (b) herbivore (c) saprophytic (d) parasitic.

What happens when zinc carbonate is heated?

Write a brief note on bauxite.

Out of the following, which set of hydrocarbons undergo addition reactions?C2H6, C3H8, C3H6, C2H2, CH4

When we write the definition for metals we say every thing that produces positive ions (except than hydrogen) by losing electron And for non-metals we write the opposite but still the Hydrogen is exceptional element.Why such happens?

calcium carbonate react with HCl to give cacl2 + CO2 according to the reaction caco3 +2 HCL gives rise to cacl2 + CO2 + H2O .what mass of 20% caco3 is required to react completely with 250 ml of 0.50 M HCL

The molecular formula of the given compound is ________.

(i) What is the purpose of the contact process?(ii) Name the two gases that are combined during the contact process.(iii) Name the catalyst used in the process.(iv) Write the equation for the reaction between zinc and the final product of the contact process.

(a) The table below compares some properties of metals and non-metals. Write down the missing statement (i) to (iv): Metal Non-metal (i) Malleable Form positive ions. (iv) Poor conductors of heat (ii) (iii) Form acidic oxides

Question 6 (b)Give reasons for the following.Immersion rods for heating liquids are made up of metallic substances.

The symbols given below represents the nuclei of radioactive elements. Which among the following are isotopes? 23091W , 23592X , 23893Y , 23892Z

Vous allez à la gare de Lyon pour acheter des billets pour Marseille. Rédigez le dialogue entre vous et l'employé.

The standard temperature and pressure values are:

The equivalent wt of metal is 16. Vapour density of its chloride is 77.25. Then atomic mass of metal is

Reduction involves

Which of the following is not deliquescent substance:-

Two closed vessel A and B of equal volumecontaining air at pressure P, and temperature Tare connected to each other through a narrow opentube. If the temperature of one is now maintainedat T, and other at T2 (where T, > T2) then thatwhat will be the final pressure?2PIT2(1)2P T2(2)(D)1-11

Which of the following is position isomer of?

Which of the following reaction correctly represents the oxidation process of Galvanic cell?

Which of the following compounds of carbon is soluble in water?

Which of the following is called as strategic metal?

How to calculate atomic mass of an element ?

From amongst the metals sodium, calcium, aluminium, copper and magnesium, name the metal (i) which reacts with water only on boiling, and (ii) another which does not react even with steam.

In a food chain consisting of grass, frog, bird, and insects, where will the concentration of the harmful chemicals be maximum?

Observe the table and identify metals and non-metals. Select the correct option. Sl.NoSet-1Set-21.Sodium (Na)Oxygen (O)2.Magnesium (Mg)Chlorine (Cl)3.Iron (Fe)Nitrogen (N)4.Gold (Au)Sulphur (S)5.Calcium (Ca)Carbon (C)

The number of orbital with n=5,m,=+2 is/are: (Round off to the Nearest Integer)

The difference in number of water molecules in gypsum and plaster of paris is:

Name an allotrope of carbon which contains both single and double bonds between carbon atoms.

Which species has the maximum number of lone pair of electrons on the central atom?