15280 + Interview Questions in Chemistry Page 95 InterviewSolution

4701.	ntIn a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electricntpotential V and then made to describe semicircular paths of radius R using a magnetic field B. If V and B arentkept constant, the ratio charge on the ion to mass of the ion will be proportional ton
Answer» ntIn a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electricntpotential V and then made to describe semicircular paths of radius R using a magnetic field B. If V and B arentkept constant, the ratio charge on the ion to mass of the ion will be proportional ton

Discussion

4702.	If the Electrostatic force is so much stronger than the gravitational force, how come it isn't as obvious as gravitation is around us?
Answer» If the Electrostatic force is so much stronger than the gravitational force, how come it isn't as obvious as gravitation is around us?

Discussion

4703.	Give two chemical tests for nitric acid.
Answer» Give two chemical tests for nitric acid.

Discussion

4704.	Bronze is an alloy of:
Answer» Bronze is an alloy of:

Discussion

4705.	Explain with the help of a balanced equation the brown ring test for nitric acid.
Answer» Explain with the help of a balanced equation the brown ring test for nitric acid.

Discussion

4706.	two vessels sepearately contain two ideal gases A and B at the same temperature ,the presure of A being twice that of B.Under such conditions,the density of A is found to be 1.5 times the density of B.The ratio of molecular weight of A and B is?
Answer» two vessels sepearately contain two ideal gases A and B at the same temperature ,the presure of A being twice that of B.Under such conditions,the density of A is found to be 1.5 times the density of B.The ratio of molecular weight of A and B is?

Discussion

4707.	7. A mixture of HCOOH and H2C2O4 is heated with concentrated H2SO4.The gas produced is collected and on treating with KOH solution, the volume of the gas decreases by one sixth.The molar ratio of two acid (HCOOH: H2C2O4) in the original mixture is
Answer» 7. A mixture of HCOOH and H2C2O4 is heated with concentrated H2SO4.The gas produced is collected and on treating with KOH solution, the volume of the gas decreases by one sixth.The molar ratio of two acid (HCOOH: H2C2O4) in the original mixture is

Discussion

4708.	: Can 1M NiSO4 be stored in a vessel made up of copper ? Given E°Ni2+/Ni = -1.02V andE°Cu2+/Cu = 0.34 Vhow to decide which is anode shouldn't the one with lesser reduction potential be anode which in this case should be negative value
Answer» : Can 1M NiSO4 be stored in a vessel made up of copper ? Given E°Ni2+/Ni = -1.02V and E°Cu2+/Cu = 0.34 V how to decide which is anode shouldn't the one with lesser reduction potential be anode which in this case should be negative value

Discussion

4709.	Write the structural formula of ethanol. What happens when it is heated with excess of conc. H2SO4 at 443 K? Write the chemical equation for the reaction stating the role of conc. H2SO4 in this reaction.
Answer» Write the structural formula of ethanol. What happens when it is heated with excess of conc. $H_{2} S O_{4}$ at 443 K? Write the chemical equation for the reaction stating the role of conc. $H_{2} S O_{4}$ in this reaction.

Discussion

4710.	21. Which is the most basic oxide? a) ZnO b) MgO c) Al2 O3 d) N2 O5
Answer» 21. Which is the most basic oxide? a) ZnO b) MgO c) Al2 O3 d) N2 O5

Discussion

4711.	What is a homologous series? Explain with an example.
Answer» What is a homologous series? Explain with an example.

Discussion

4712.	Name the element whose one of the allotropic forms is buckminsterfullerene.
Answer» Name the element whose one of the allotropic forms is buckminsterfullerene.

Discussion

4713.	Which of the following reactions is the metal displacement reaction? Choose the right option
Answer» Which of the following reactions is the metal displacement reaction? Choose the right option

Discussion

4714.	Show the structure of covalent bonds in methane.
Answer» Show the structure of covalent bonds in methane.

Discussion

4715.	(a) Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation:P + 5HNO3 → H3PO4 + H2O + 5NO2(i) What mass of phosphoric acid can be prepared from 6.2 g of phosphorus?(ii) What mass of nitric acid will be consumed at the same time?(iii) What will be the volume of steam at the same time measured at 760 mm Hg pressure and 373°C? (H = 1; N = 14; O = 16; P = 31)(b) Ammonia may be oxidised to nitrogen monoxide in the presence of a catalyst according to the following equation:4NH3 + 5O2 → 4NO + 6H2OIf 27 litres of reactants are consumed, what volume of nitrogen monoxide is produced at the same temperature and pressure?
Answer» (a) Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation: P + 5HNO₃ $\overset{}{\to}$ H₃PO₄ + H₂O + 5NO₂ (i) What mass of phosphoric acid can be prepared from 6.2 g of phosphorus? (ii) What mass of nitric acid will be consumed at the same time? (iii) What will be the volume of steam at the same time measured at 760 mm Hg pressure and 373°C? (H = 1; N = 14; O = 16; P = 31) (b) Ammonia may be oxidised to nitrogen monoxide in the presence of a catalyst according to the following equation: 4NH₃ + 5O₂ $\overset{}{\to}$ 4NO + 6H₂O If 27 litres of reactants are consumed, what volume of nitrogen monoxide is produced at the same temperature and pressure?

Discussion

4716.	200g of a sample of limestone libetates 66g of CO2 on heating.The percentage impurity of CaCo3in the limestone is 1) 95% 2) 85% 3) 90% 4) 75%
Answer» 200g of a sample of limestone libetates 66g of CO2 on heating.The percentage impurity of CaCo3in the limestone is 1) 95% 2) 85% 3) 90% 4) 75%

Discussion

4717.	1) Name the metal which does not stick to glass. 2) Name the non-metal which is a good conductor of electricity. 3) Name the metal which is commonly used in thermit welding. 4) What gets deposited at the cathode, a pure or impure metal? 5) What is the nature of zinc oxide?
Answer» 1) Name the metal which does not stick to glass. 2) Name the non-metal which is a good conductor of electricity. 3) Name the metal which is commonly used in thermit welding. 4) What gets deposited at the cathode, a pure or impure metal? 5) What is the nature of zinc oxide?

Discussion

4718.	Question 46A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature. Identify A and B. Write down the reactions of oxide B with HCl and NaOH.
Answer» Question 46 A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature. Identify A and B. Write down the reactions of oxide B with HCl and NaOH.

Discussion

4719.	Explain the concept of activation energy
Answer» Explain the concept of activation energy

Discussion

4720.	Statement 1: Magnesium burns in air with a dazzling white flame. Statement 2: Metal + Water → Metal oxide + Hydrogen
Answer» Statement 1: Magnesium burns in air with a dazzling white flame. Statement 2: Metal + Water $\to$ Metal oxide + Hydrogen

Discussion

4721.	State the type of bonding in the following molecules. (a) water, (b) calcium oxide, (c) hydrogen chloride
Answer» State the type of bonding in the following molecules. (a) water, (b) calcium oxide, (c) hydrogen chloride

4721.

State the type of bonding in the following molecules. (a) water, (b) calcium oxide, (c) hydrogen chloride

Answer»

State the type of bonding in the following molecules.

(a) water, (b) calcium oxide, (c) hydrogen chloride

Discussion

4722.	In which direction is the flow of electrons in an indirect redox reaction?
Answer» In which direction is the flow of electrons in an indirect redox reaction?

Discussion

4723.	Distinguish between alkaloids and resins? (3marks)
Answer» Distinguish between alkaloids and resins? (3marks)

Discussion

4724.	acidic order of group 15
Answer» acidic order of group 15

Discussion

4725.	Calculate Molarity of a solution with 3 moles of compound A in 1l of solution.
Answer» Calculate Molarity of a solution with 3 moles of compound A in 1l of solution.

Discussion

4726.	Find the no. of molecules which will not exhibit sp mixing.NO, N2B2,,C2,O2,O22+O22−,N22+,N2+
Answer» Find the no. of molecules which will not exhibit sp mixing. $N O$ , $N_{2} B_{2},, C_{2}, O_{2}, O {_{2}}^{2^{+}} O {_{2}}^{2^{-}}, N {_{2}}^{2^{+}}, N {_{2}}^{+}$

Discussion

4727.	57. A compound contains 4% chlorine. Find out the maximum and minimum molecular weight of compound
Answer» 57. A compound contains 4% chlorine. Find out the maximum and minimum molecular weight of compound

Discussion

4728.	What happens chemically when baking soda is heated? Give chemical equation also.
Answer» What happens chemically when baking soda is heated? Give chemical equation also.

Discussion

4729.	The recoil speed of hydrogen atom after it emits a photon in going from n = 2 state to n = 1 state is nearly [Take R∞=1.1×10−1 and h=6.63×10−34 Js]
Answer» The recoil speed of hydrogen atom after it emits a photon in going from n = 2 state to n = 1 state is nearly [Take $R_{\infty} = 1.1 \times 10^{- 1}$ and $h = 6.63 \times 10^{- 34} Js]$

Discussion

4730.	Choose the correct answer:Dilute sulphuric acid will produce a white precipitate when added to a solution of:(a) Copper nitrate(b) Zinc nitrate(c) Lead nitrate(d) Sodium nitrate
Answer» Choose the correct answer: Dilute sulphuric acid will produce a white precipitate when added to a solution of: (a) Copper nitrate (b) Zinc nitrate (c) Lead nitrate (d) Sodium nitrate

Discussion

4731.	The bond order of N2 is?
Answer» The bond order of N2 is?

Discussion

4732.	Natural sample of cupric carbonate contains 51.35% of oxygen and 38.91% of carbon. Synthetic sample of compound will contain ___ % of elements
Answer» Natural sample of cupric carbonate contains 51.35% of oxygen and 38.91% of carbon. Synthetic sample of compound will contain ___ % of elements

Discussion

4733.	(i) What is the purpose of the pH scale?(ii) What is the pH of pure water?(iii) A is a soluble acidic oxide; B is a soluble base. Compared to the pH of pure water, what is the pH of(a) a soluble of A?(b) a solution of B?
Answer» (i) What is the purpose of the pH scale? (ii) What is the pH of pure water? (iii) A is a soluble acidic oxide; B is a soluble base. Compared to the pH of pure water, what is the pH of (a) a soluble of A? (b) a solution of B?

Discussion

4734.	Ethanol reacts with Na metal to form:
Answer» Ethanol reacts with $N a$ metal to form:

Discussion

4735.	The successive members of a homologous series differ by a mass of ______amu.14
Answer» The successive members of a homologous series differ by a mass of ______amu. 14

Discussion

4736.	29. 52 g of impure HgCO3 sample is heated to form Hg, O2, CO2. IF the percentage purity of sample is 80% then the mass of Hg obtained? a) 0.40 M b) 0.2 M c) 0.122 M d) 0.02 M
Answer» 29. 52 g of impure HgCO3 sample is heated to form Hg, O2, CO2. IF the percentage purity of sample is 80% then the mass of Hg obtained? a) 0.40 M b) 0.2 M c) 0.122 M d) 0.02 M

Discussion

4737.	Which of the following option is correct according to the following table? 1CationAPO43−2AnionBManganese dioxide3Oxidising AgentCCarbon4Reducing AgentDNa+
Answer» Which of the following option is correct according to the following table? $\begin{matrix} 1 & C a t i o n & A & P O_{4}^{3 -} 2 & A n i o n & B & M a n g a n e s e d i o x i d e 3 & O x i d i s i n g A g e n t & C & C a r b o n 4 & R e d u c i n g A g e n t & D & N a^{+} \end{matrix}$

4737.

Which of the following option is correct according to the following table? 1CationAPO43−2AnionBManganese dioxide3Oxidising AgentCCarbon4Reducing AgentDNa+

Answer»

Which of the following option is correct according to the following table?

$\begin{matrix} 1 & C a t i o n & A & P O_{4}^{3 -} 2 & A n i o n & B & M a n g a n e s e d i o x i d e 3 & O x i d i s i n g A g e n t & C & C a r b o n 4 & R e d u c i n g A g e n t & D & N a^{+} \end{matrix}$

Discussion

4738.	42. Elements A and B form two compounds B2A3 and B2A. 0.05 moles of B3A3 weight 9g and 0.10 mole of B2A weight 10g, atomic weight of A and B are? (1) 20 and 30 (2) 30 and 40 (3) 40 and 30 (4) 30 and 20
Answer» 42. Elements A and B form two compounds B2A3 and B2A. 0.05 moles of B3A3 weight 9g and 0.10 mole of B2A weight 10g, atomic weight of A and B are? (1) 20 and 30 (2) 30 and 40 (3) 40 and 30 (4) 30 and 20

Discussion

4739.	what volume of carbon dioxide at STP will evolve when 1 g of calcium carbonate reacts with excess of dil hcl
Answer» what volume of carbon dioxide at STP will evolve when 1 g of calcium carbonate reacts with excess of dil hcl

Discussion

4740.	what is the formula of bimolecular collision (z_{11
Answer» what is the formula of bimolecular collision (z_{11

Discussion

4741.	During the production of sulphuric acid by the contact process, the three reactions represented by the equations below occur.S(l) + O2(g) → SO2(g)2SO2(g) + O2(g) → 2SO3(g)SO3(g) + H2SO4(l) → H2S2O7(l)Which of the following statements is true for all three of these reactions?
Answer» During the production of sulphuric acid by the contact process, the three reactions represented by the equations below occur. S(l) + O₂(g) → SO₂(g) 2SO₂(g) + O₂(g) → 2SO₃(g) SO₃(g) + H₂SO₄(l) → H₂S₂O₇(l) Which of the following statements is true for all three of these reactions?

4741.

During the production of sulphuric acid by the contact process, the three reactions represented by the equations below occur.S(l) + O2(g) → SO2(g)2SO2(g) + O2(g) → 2SO3(g)SO3(g) + H2SO4(l) → H2S2O7(l)Which of the following statements is true for all three of these reactions?

Answer»

During the production of sulphuric acid by the contact process, the three reactions represented by the equations below occur.

S(l) + O₂(g) → SO₂(g)

2SO₂(g) + O₂(g) → 2SO₃(g)

SO₃(g) + H₂SO₄(l) → H₂S₂O₇(l)

Which of the following statements is true for all three of these reactions?

Discussion

4742.	In an experiment, 15 g of compound X is heated in a closed glass container to give compounds Y and Z. The total mass of the product formed is ______ g. 15
Answer» In an experiment, 15 g of compound X is heated in a closed glass container to give compounds Y and Z. The total mass of the product formed is ______ g. 15

Discussion

4743.	Give reason for the following:Dilute hydrochloric acid cannot be concentrated by distilling (boiling) the dilute acid.
Answer» Give reason for the following: Dilute hydrochloric acid cannot be concentrated by distilling (boiling) the dilute acid.

Discussion

4744.	Factors on which strength of an acid depends on
Answer» Factors on which strength of an acid depends on

Discussion

4745.	Which one of the following has the lowest melting point?
Answer» Which one of the following has the lowest melting point?

Discussion

4746.	Magnesium ribbon when burnt in the air forms a new compound. What is the chemical composition of the compound formed and the changes involved in the process?
Answer» Magnesium ribbon when burnt in the air forms a new compound. What is the chemical composition of the compound formed and the changes involved in the process?

Discussion

4747.	4. A container contains 32 g of O2 at a temperature TThe pressure of the gas is P. An identical containercontaining 4 g of H2 at a temperature 2T has apressure of(1) 8P(3) P(2) 4P(4) P18r-cnstant
Answer» 4. A container contains 32 g of O2 at a temperature TThe pressure of the gas is P. An identical containercontaining 4 g of H2 at a temperature 2T has apressure of(1) 8P(3) P(2) 4P(4) P18r-cnstant

Discussion

4748.	A student prepared 20% sodium hydroxide solution in a beaker containing water. The observations noted by him are given below (I) Sodium hydroxide is in the form of pellets. (II) It dissolves in water readily. (III) The beaker appears cold when touched from outside. (iv) The red litmus paper turns blue when dipped into the solution
Answer» A student prepared $20 %$ sodium hydroxide solution in a beaker containing water. The observations noted by him are given below (I) Sodium hydroxide is in the form of pellets. (II) It dissolves in water readily. (III) The beaker appears cold when touched from outside. (iv) The red litmus paper turns blue when dipped into the solution

4748.

A student prepared 20% sodium hydroxide solution in a beaker containing water. The observations noted by him are given below (I) Sodium hydroxide is in the form of pellets. (II) It dissolves in water readily. (III) The beaker appears cold when touched from outside. (iv) The red litmus paper turns blue when dipped into the solution

Answer»

A student prepared $20 %$ sodium hydroxide solution in a beaker containing water. The observations noted by him are given below

(I) Sodium hydroxide is in the form of pellets.

(II) It dissolves in water readily.

(III) The beaker appears cold when touched from outside.

(iv) The red litmus paper turns blue when dipped into the solution

Discussion

4749.	Ionic compounds are __
Answer» Ionic compounds are __

Discussion

4750.	0.45gm of diasic acid is completely neutralised with 100ml N/10 NaOH the molecular weight of acid?
Answer» 0.45gm of diasic acid is completely neutralised with 100ml N/10 NaOH the molecular weight of acid?

Discussion

Explore topic-wise InterviewSolutions in .

If the Electrostatic force is so much stronger than the gravitational force, how come it isn't as obvious as gravitation is around us?

Give two chemical tests for nitric acid.

Bronze is an alloy of:

Explain with the help of a balanced equation the brown ring test for nitric acid.

two vessels sepearately contain two ideal gases A and B at the same temperature ,the presure of A being twice that of B.Under such conditions,the density of A is found to be 1.5 times the density of B.The ratio of molecular weight of A and B is?

7. A mixture of HCOOH and H2C2O4 is heated with concentrated H2SO4.The gas produced is collected and on treating with KOH solution, the volume of the gas decreases by one sixth.The molar ratio of two acid (HCOOH: H2C2O4) in the original mixture is

: Can 1M NiSO4 be stored in a vessel made up of copper ? Given E°Ni2+/Ni = -1.02V andE°Cu2+/Cu = 0.34 Vhow to decide which is anode shouldn't the one with lesser reduction potential be anode which in this case should be negative value

Write the structural formula of ethanol. What happens when it is heated with excess of conc. H2SO4 at 443 K? Write the chemical equation for the reaction stating the role of conc. H2SO4 in this reaction.

21. Which is the most basic oxide? a) ZnO b) MgO c) Al2 O3 d) N2 O5

What is a homologous series? Explain with an example.

Name the element whose one of the allotropic forms is buckminsterfullerene.

Which of the following reactions is the metal displacement reaction? Choose the right option

Show the structure of covalent bonds in methane.

200g of a sample of limestone libetates 66g of CO2 on heating.The percentage impurity of CaCo3in the limestone is 1) 95% 2) 85% 3) 90% 4) 75%

1) Name the metal which does not stick to glass. 2) Name the non-metal which is a good conductor of electricity. 3) Name the metal which is commonly used in thermit welding. 4) What gets deposited at the cathode, a pure or impure metal? 5) What is the nature of zinc oxide?

Question 46A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature. Identify A and B. Write down the reactions of oxide B with HCl and NaOH.

Explain the concept of activation energy

Statement 1: Magnesium burns in air with a dazzling white flame. Statement 2: Metal + Water → Metal oxide + Hydrogen

State the type of bonding in the following molecules. (a) water, (b) calcium oxide, (c) hydrogen chloride

In which direction is the flow of electrons in an indirect redox reaction?

Distinguish between alkaloids and resins? (3marks)

acidic order of group 15

Calculate Molarity of a solution with 3 moles of compound A in 1l of solution.

Find the no. of molecules which will not exhibit sp mixing.NO, N2B2,,C2,O2,O22+O22−,N22+,N2+

57. A compound contains 4% chlorine. Find out the maximum and minimum molecular weight of compound

What happens chemically when baking soda is heated? Give chemical equation also.

The recoil speed of hydrogen atom after it emits a photon in going from n = 2 state to n = 1 state is nearly [Take R∞=1.1×10−1 and h=6.63×10−34 Js]

Choose the correct answer:Dilute sulphuric acid will produce a white precipitate when added to a solution of:(a) Copper nitrate(b) Zinc nitrate(c) Lead nitrate(d) Sodium nitrate

The bond order of N2 is?

Natural sample of cupric carbonate contains 51.35% of oxygen and 38.91% of carbon. Synthetic sample of compound will contain ___ % of elements

(i) What is the purpose of the pH scale?(ii) What is the pH of pure water?(iii) A is a soluble acidic oxide; B is a soluble base. Compared to the pH of pure water, what is the pH of(a) a soluble of A?(b) a solution of B?

Ethanol reacts with Na metal to form:

The successive members of a homologous series differ by a mass of ______amu.14

29. 52 g of impure HgCO3 sample is heated to form Hg, O2, CO2. IF the percentage purity of sample is 80% then the mass of Hg obtained? a) 0.40 M b) 0.2 M c) 0.122 M d) 0.02 M

Which of the following option is correct according to the following table? 1CationAPO43−2AnionBManganese dioxide3Oxidising AgentCCarbon4Reducing AgentDNa+

42. Elements A and B form two compounds B2A3 and B2A. 0.05 moles of B3A3 weight 9g and 0.10 mole of B2A weight 10g, atomic weight of A and B are? (1) 20 and 30 (2) 30 and 40 (3) 40 and 30 (4) 30 and 20

what volume of carbon dioxide at STP will evolve when 1 g of calcium carbonate reacts with excess of dil hcl

what is the formula of bimolecular collision (z_{11

During the production of sulphuric acid by the contact process, the three reactions represented by the equations below occur.S(l) + O2(g) → SO2(g)2SO2(g) + O2(g) → 2SO3(g)SO3(g) + H2SO4(l) → H2S2O7(l)Which of the following statements is true for all three of these reactions?

In an experiment, 15 g of compound X is heated in a closed glass container to give compounds Y and Z. The total mass of the product formed is ______ g. 15

Give reason for the following:Dilute hydrochloric acid cannot be concentrated by distilling (boiling) the dilute acid.

Factors on which strength of an acid depends on

Which one of the following has the lowest melting point?

Magnesium ribbon when burnt in the air forms a new compound. What is the chemical composition of the compound formed and the changes involved in the process?

4. A container contains 32 g of O2 at a temperature TThe pressure of the gas is P. An identical containercontaining 4 g of H2 at a temperature 2T has apressure of(1) 8P(3) P(2) 4P(4) P18r-cnstant

Ionic compounds are __

0.45gm of diasic acid is completely neutralised with 100ml N/10 NaOH the molecular weight of acid?