15280 + Interview Questions in Chemistry Page 43 InterviewSolution

2101.	Name two alloys of iron. What elements are present in these alloys?
Answer» Name two alloys of iron. What elements are present in these alloys?

Discussion

2102.	final pH of the solution obtained on mixing 100 ml 0.01 M HCl and 100 ml 0.01 M CH3COOH (Ka= 10^-5) is [log 5=0.7]
Answer» final pH of the solution obtained on mixing 100 ml 0.01 M HCl and 100 ml 0.01 M CH3COOH (Ka= 10^-5) is [log 5=0.7]

Discussion

2103.	Question 12What is hydrogenation? What is its industrial application?
Answer» Question 12 What is hydrogenation? What is its industrial application?

Discussion

2104.	(a) Write the equation for the preparation of carbon tetrachloride from methane. (b) Draw the structural formula of ethyne. (c) How is the structure of alkynes different from that of alkenes ?
Answer» (a) Write the equation for the preparation of carbon tetrachloride from methane. (b) Draw the structural formula of ethyne. (c) How is the structure of alkynes different from that of alkenes ?

Discussion

2105.	Write the electron dot structure of ethane molecule, C2H6.
Answer» Write the electron dot structure of ethane molecule, $C_{2} H_{6}$ _.

Discussion

2106.	How many moles of magnesium phosphate will contain 0.25 mole of oxygen atom
Answer» How many moles of magnesium phosphate will contain 0.25 mole of oxygen atom

Discussion

2107.	For a silver- magnesium voltaic cell,calculate the standard emf (E0cell) Mg2++2e−→Mg(s); E0=−2.37 VAg+(aq)+e−→Ag(s); E0=+0.80 V
Answer» For a silver- magnesium voltaic cell,calculate the standard emf $(E_{c e l l}^{0})$ $M g^{2 +} + 2 e^{-} \to M g (s); E^{0} = - 2.37 V$ $A g^{+} (a q) + e^{-} \to A g (s); E^{0} = + 0.80 V$

Discussion

2108.	Which machines will you use to do the following work? Write their types.(a) To remove the lid of a tin.(b) To lift bricks to the top of a tall building.(c) To cut vegetables.(d) To draw water from a well.(e) To hold a papad for roasting it.
Answer» Which machines will you use to do the following work? Write their types. (a) To remove the lid of a tin. (b) To lift bricks to the top of a tall building. (c) To cut vegetables. (d) To draw water from a well. (e) To hold a papad for roasting it.

Discussion

2109.	What is observed when ammonia is mixed with hydrochloric acid?
Answer» What is observed when ammonia is mixed with hydrochloric acid?

Discussion

2110.	Hydrogen chloride dissolves in water to form an acidic solution.(a) Name the experiment which demonstrates that hydrogen chloride is very soluble in water.(b) Give three distinct tests (apart from using an indicator) you would carry out with this solution to illustrate the typical properties of an acid.
Answer» Hydrogen chloride dissolves in water to form an acidic solution. (a) Name the experiment which demonstrates that hydrogen chloride is very soluble in water. (b) Give three distinct tests (apart from using an indicator) you would carry out with this solution to illustrate the typical properties of an acid.

Discussion

2111.	Write the two differences between the chemical composition of soaps and detergents
Answer» Write the two differences between the chemical composition of soaps and detergents

Discussion

2112.	The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is : (a) P (b) Q (c) R (d) S
Answer» The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is : (a) P (b) Q (c) R (d) S

2112.

The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is : (a) P (b) Q (c) R (d) S

Answer»

The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is :

(a) P (b) Q (c) R (d) S

Discussion

2113.	Does sodium reacts more vigrously in hot water than cold water?why or why not.
Answer» Does sodium reacts more vigrously in hot water than cold water?why or why not.

Discussion

2114.	what are the number of shells of H atom ?
Answer» what are the number of shells of H atom ?

Discussion

2115.	A small piece of sodium metal is added to a neutral organic liquid, taken in a dry test-tube. Bubbles of a gas are produced in the test-tube. When a burning match-stick is brought near the mouth of the test-tube, the gas burns with a 'pop' sound, making a little explosion.(a) Name the functional group present in the organic liquid.(b) Write the name and formula of an organic liquid having this functional group.
Answer» A small piece of sodium metal is added to a neutral organic liquid, taken in a dry test-tube. Bubbles of a gas are produced in the test-tube. When a burning match-stick is brought near the mouth of the test-tube, the gas burns with a 'pop' sound, making a little explosion. (a) Name the functional group present in the organic liquid. (b) Write the name and formula of an organic liquid having this functional group.

Discussion

2116.	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

2117.	Define: (a) precipitation (b) neutralization (c) catalyst
Answer» Define: (a) precipitation (b) neutralization (c) catalyst

2117.

Define: (a) precipitation (b) neutralization (c) catalyst

Answer»

Define:

(a) precipitation (b) neutralization

(c) catalyst

Discussion

2118.	What will be the product of above reaction?
Answer» What will be the product of above reaction?

Discussion

2119.	Question 13What is the difference between displacement and double displacement reaction? Write equations for these reactions.
Answer» Question 13 What is the difference between displacement and double displacement reaction? Write equations for these reactions.

Discussion

2120.	Identify the major products A and B respectively in the following reaction of phenol:
Answer» Identify the major products $A$ and $B$ respectively in the following reaction of phenol:

Discussion

2121.	How scientists came to know that chlorine isotopes are found in the ratio of 3 is to 1 in the universe?
Answer» How scientists came to know that chlorine isotopes are found in the ratio of 3 is to 1 in the universe?

Discussion

2122.	Choose the correct answer:A gas cylinder of capacity of 20 dm3 is filled with gas X the mass of which is 10 g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative molecular mass of the gas is:(a) 5(b) 10(c) 15(d) 20
Answer» Choose the correct answer: A gas cylinder of capacity of 20 dm³ is filled with gas X the mass of which is 10 g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative molecular mass of the gas is: (a) 5 (b) 10 (c) 15 (d) 20

Discussion

2123.	Concentration of NaOH is 20%w/v .find=1] no.of moles nd weight of NaOH present in 200 ml of solution.2] Molarity of solution
Answer» Concentration of NaOH is 20%w/v .find= 1] no.of moles nd weight of NaOH present in 200 ml of solution. 2] Molarity of solution

Discussion

2124.	For pure water increases while pOH1 (a) pH11.at 60°C and an aqueous solution with pH-7(b) 3.1 10. neutral (d) 3.1 107, basicdecreases with rise in temperature (b) pH decreases while pOH increases with rise in temperature (c) both pH and pOH decreases with rise in temperature (d) both pH and pOH increases with rise in temperature
Answer» For pure water increases while pOH 1 (a) pH 11. at 60°C and an aqueous solution with pH-7 (b) 3.1 10. neutral (d) 3.1 107, basic decreases with rise in temperature (b) pH decreases while pOH increases with rise in temperature (c) both pH and pOH decreases with rise in temperature (d) both pH and pOH increases with rise in temperature

Discussion

2125.	1. When 18.4 g N2O4 is kept in 2L vessel at 300 K temperature, it attains the following equilibrium N2O4(g)---->2NO2(g) If the total pressure of reaction mixture at equilibrium was found to be 4.25 atm, then Kc for the reaction would be
Answer» 1. When 18.4 g N2O4 is kept in 2L vessel at 300 K temperature, it attains the following equilibrium N2O4(g)---->2NO2(g) If the total pressure of reaction mixture at equilibrium was found to be 4.25 atm, then Kc for the reaction would be

Discussion

2126.	Which of the following has maximum msgnitude of electron gsin enthalpy1. li+2.na+3.k+4.Rb+
Answer» Which of the following has maximum msgnitude of electron gsin enthalpy 1. li+ 2.na+ 3.k+ 4.Rb+

Discussion

2127.	Polarisation of electrons in acrolein may be written as:
Answer» Polarisation of electrons in acrolein may be written as:

Discussion

2128.	What is Weston cadmium cell ?
Answer» What is Weston cadmium cell ?

Discussion

2129.	A metal M forms a volatile chloride containing 65.5% chlorine. If the density of the chloride relative to hydrogen is 162.5, find the molecular formula of the chloride. [M = 56, Cl = 35.5] Given: Cl = 65.5% M = (100-65.5)% = 34.5 %
Answer» A metal M forms a volatile chloride containing 65.5% chlorine. If the density of the chloride relative to hydrogen is 162.5, find the molecular formula of the chloride. [M = 56, Cl = 35.5] Given: Cl = 65.5% M = (100-65.5)% = 34.5 %

2129.

A metal M forms a volatile chloride containing 65.5% chlorine. If the density of the chloride relative to hydrogen is 162.5, find the molecular formula of the chloride. [M = 56, Cl = 35.5] Given: Cl = 65.5% M = (100-65.5)% = 34.5 %

Answer»

A metal M forms a volatile chloride containing 65.5% chlorine. If the density of the chloride relative to hydrogen is 162.5, find the molecular formula of the chloride.

[M = 56, Cl = 35.5]

Given: Cl = 65.5%

M = (100-65.5)% = 34.5 %

Discussion

2130.	Look at the following reaction:A: nitrogen + metal → compound XB: X + water → ammonia + another compound.C: ammonia + metal oxide → metal + water + N2(i) One metal that can be used for reaction A is magnesium.(a) Write the formula of the compound X, that is formed.(b) Write the balanced equation for reaction B, where X is the compound formed.(c) Which property of ammonia is demonstrated by reaction C?
Answer» Look at the following reaction: A: nitrogen + metal $\overset{}{\to}$ compound X B: X + water $\overset{}{\to}$ ammonia + another compound. C: ammonia + metal oxide $\overset{}{\to}$ metal + water + N₂ (i) One metal that can be used for reaction A is magnesium. (a) Write the formula of the compound X, that is formed. (b) Write the balanced equation for reaction B, where X is the compound formed. (c) Which property of ammonia is demonstrated by reaction C?

Discussion

2131.	(CH3)3CMgCl on treatment with D2O produces.
Answer» $(C H_{3})_{3} C M g C l$ on treatment with $D_{2} O$ produces.

Discussion

2132.	Explain electrolysis of lead bromide.
Answer» Explain electrolysis of lead bromide.

Discussion

2133.	How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
Answer» How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?

Discussion

2134.	(a) Write the balanced equations for the preparation of the following compounds (as the major product), starting from iron and using only one other substance:(i) iron (II) chloride(ii) iron (III) chloride(iii) iron (II) sulphate(iv) iron (II) sulphide(b) Write the equations for the laboratory preparation of(i) sodium sulphate using dilute sulphuric acid.(ii) lead sulphate using dilute sulphuric acid.
Answer» (a) Write the balanced equations for the preparation of the following compounds (as the major product), starting from iron and using only one other substance: (i) iron (II) chloride (ii) iron (III) chloride (iii) iron (II) sulphate (iv) iron (II) sulphide (b) Write the equations for the laboratory preparation of (i) sodium sulphate using dilute sulphuric acid. (ii) lead sulphate using dilute sulphuric acid.

Discussion

2135.	Determine the empirical formula of a compound containing 43.3% sodium, 11.3% Carbon, 45.28% Oxygen by mass
Answer» Determine the empirical formula of a compound containing 43.3% sodium, 11.3% Carbon, 45.28% Oxygen by mass

Discussion

2136.	What is the precipitate formed on passage of Ammonia gas through copper sulphate solution which looks pale blue?
Answer» What is the precipitate formed on passage of Ammonia gas through copper sulphate solution which looks pale blue?

Discussion

2137.	An electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom. Calculate the ionization energy of sodium in kJ mol−1.
Answer» An electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom. Calculate the ionization energy of sodium in kJ ${m o l}^{- 1}$ .

Discussion

2138.	67.how many types of cations and anions are present in aqueous solution of NaCl
Answer» 67.how many types of cations and anions are present in aqueous solution of NaCl

Discussion

2139.	How many grams of calcium oxide are obtained by heating 50 g of CaCO3(s)?
Answer» How many grams of calcium oxide are obtained by heating $50 g$ of $C a C O_{3} (s)$ ?

Discussion

2140.	The systematic-IUPAC name of the following compound is
Answer» The systematic-IUPAC name of the following compound is

2140.

The systematic-IUPAC name of the following compound is

Answer»

The systematic-IUPAC name of the following compound is

Discussion

2141.	In the given reactionP4 + NaOH + H2O PH3 + NaH2PO2P is reduced or oxidised
Answer» In the given reaction P4 + NaOH + H2O PH3 + NaH2PO2 P is reduced or oxidised

Discussion

2142.	Now, let, the degree of unsaturation of B = x The degree of unsaturation of C = y Total number of stereoisomers of B = z Total number of stereoisomers of C = mThen, calculate the value of (xy+1)m+z
Answer» Now, let, the degree of unsaturation of B = $x$ The degree of unsaturation of C = $y$ Total number of stereoisomers of B = $z$ Total number of stereoisomers of C = $m$ Then, calculate the value of $\frac{(x y + 1)}{m + z}$

Discussion

2143.	Complete and balance the following reaction: CH4(g)+O2(g)→
Answer» Complete and balance the following reaction: ${CH}_{4} (g) + O_{2} (g) \to$

2143.

Complete and balance the following reaction: CH4(g)+O2(g)→

Answer»

Complete and balance the following reaction:

${CH}_{4} (g) + O_{2} (g) \to$

Discussion

2144.	Why Is chlorination of alkenes unselective in nature while Bromination is selective
Answer» Why Is chlorination of alkenes unselective in nature while Bromination is selective

Discussion

2145.	A student requires hard water for an experiment in his laboratory which is not available in the neighbouring area. In the laboratory there are some salts, which when dissolved in distilled water can convert it into hard water. Select from the following groups of salts, which when dissolved in distilled water will make it hard. (a) Sodium chloride, Potassium chloride (b) Sodium sulphate, Potassium sulphate (c) Sodium sulphate, Calcium sulphate (d) Calcium sulphate, Magnesium chloride
Answer» A student requires hard water for an experiment in his laboratory which is not available in the neighbouring area. In the laboratory there are some salts, which when dissolved in distilled water can convert it into hard water. Select from the following groups of salts, which when dissolved in distilled water will make it hard. (a) Sodium chloride, Potassium chloride (b) Sodium sulphate, Potassium sulphate (c) Sodium sulphate, Calcium sulphate (d) Calcium sulphate, Magnesium chloride

Discussion

2146.	A boy added a large spoon of sugar to both boiling water and cold water and observed the solution formed. Which among the following is closest to his observation?
Answer» A boy added a large spoon of sugar to both boiling water and cold water and observed the solution formed. Which among the following is closest to his observation?

Discussion

2147.	verify the law of chemical equivalence?
Answer» verify the law of chemical equivalence?

Discussion

2148.	12.When temperature of the given mass of an ideal gas is raised from 30^° C to 60^° C at constant volume, the ratio of final to initial pressure is 11:10. what is the value of absolute zero temperature for the gas ??
Answer» 12.When temperature of the given mass of an ideal gas is raised from 30^° C to 60^° C at constant volume, the ratio of final to initial pressure is 11:10. what is the value of absolute zero temperature for the gas ??

Discussion

2149.	Using sodium hydroxide solution, how will you distinguish:(a) zinc nitrate solution from calcium nitrate solution?(b) iron (II) chloride from iron (III) chloride?(c) lead hydroxide from magnesium hydroxide?
Answer» Using sodium hydroxide solution, how will you distinguish: (a) zinc nitrate solution from calcium nitrate solution? (b) iron (II) chloride from iron (III) chloride? (c) lead hydroxide from magnesium hydroxide?

Discussion

2150.	When a strong acid and a strong base are mixed, the heat released is maximum in the case of
Answer» When a strong acid and a strong base are mixed, the heat released is maximum in the case of

Discussion

Explore topic-wise InterviewSolutions in .

Name two alloys of iron. What elements are present in these alloys?

final pH of the solution obtained on mixing 100 ml 0.01 M HCl and 100 ml 0.01 M CH3COOH (Ka= 10^-5) is [log 5=0.7]

Question 12What is hydrogenation? What is its industrial application?

(a) Write the equation for the preparation of carbon tetrachloride from methane. (b) Draw the structural formula of ethyne. (c) How is the structure of alkynes different from that of alkenes ?

Write the electron dot structure of ethane molecule, C2H6.

How many moles of magnesium phosphate will contain 0.25 mole of oxygen atom

For a silver- magnesium voltaic cell,calculate the standard emf (E0cell) Mg2++2e−→Mg(s); E0=−2.37 VAg+(aq)+e−→Ag(s); E0=+0.80 V

Which machines will you use to do the following work? Write their types.(a) To remove the lid of a tin.(b) To lift bricks to the top of a tall building.(c) To cut vegetables.(d) To draw water from a well.(e) To hold a papad for roasting it.

What is observed when ammonia is mixed with hydrochloric acid?

Write the two differences between the chemical composition of soaps and detergents

The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is : (a) P (b) Q (c) R (d) S

Does sodium reacts more vigrously in hot water than cold water?why or why not.

what are the number of shells of H atom ?

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

Define: (a) precipitation (b) neutralization (c) catalyst

What will be the product of above reaction?

Question 13What is the difference between displacement and double displacement reaction? Write equations for these reactions.

Identify the major products A and B respectively in the following reaction of phenol:

How scientists came to know that chlorine isotopes are found in the ratio of 3 is to 1 in the universe?

Concentration of NaOH is 20%w/v .find=1] no.of moles nd weight of NaOH present in 200 ml of solution.2] Molarity of solution

1. When 18.4 g N2O4 is kept in 2L vessel at 300 K temperature, it attains the following equilibrium N2O4(g)---->2NO2(g) If the total pressure of reaction mixture at equilibrium was found to be 4.25 atm, then Kc for the reaction would be

Which of the following has maximum msgnitude of electron gsin enthalpy1. li+2.na+3.k+4.Rb+

Polarisation of electrons in acrolein may be written as:

What is Weston cadmium cell ?

A metal M forms a volatile chloride containing 65.5% chlorine. If the density of the chloride relative to hydrogen is 162.5, find the molecular formula of the chloride. [M = 56, Cl = 35.5] Given: Cl = 65.5% M = (100-65.5)% = 34.5 %

(CH3)3CMgCl on treatment with D2O produces.

Explain electrolysis of lead bromide.

How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?

Determine the empirical formula of a compound containing 43.3% sodium, 11.3% Carbon, 45.28% Oxygen by mass

What is the precipitate formed on passage of Ammonia gas through copper sulphate solution which looks pale blue?

An electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom. Calculate the ionization energy of sodium in kJ mol−1.

67.how many types of cations and anions are present in aqueous solution of NaCl

How many grams of calcium oxide are obtained by heating 50 g of CaCO3(s)?

The systematic-IUPAC name of the following compound is

In the given reactionP4 + NaOH + H2O PH3 + NaH2PO2P is reduced or oxidised

Now, let, the degree of unsaturation of B = x The degree of unsaturation of C = y Total number of stereoisomers of B = z Total number of stereoisomers of C = mThen, calculate the value of (xy+1)m+z

Complete and balance the following reaction: CH4(g)+O2(g)→

Why Is chlorination of alkenes unselective in nature while Bromination is selective

A boy added a large spoon of sugar to both boiling water and cold water and observed the solution formed. Which among the following is closest to his observation?

verify the law of chemical equivalence?

12.When temperature of the given mass of an ideal gas is raised from 30^° C to 60^° C at constant volume, the ratio of final to initial pressure is 11:10. what is the value of absolute zero temperature for the gas ??

Using sodium hydroxide solution, how will you distinguish:(a) zinc nitrate solution from calcium nitrate solution?(b) iron (II) chloride from iron (III) chloride?(c) lead hydroxide from magnesium hydroxide?

When a strong acid and a strong base are mixed, the heat released is maximum in the case of