15280 + Interview Questions in Chemistry Page 45 InterviewSolution

2201.	The metal which will get corroded at a slower rate on exposure to air and water is
Answer» The metal which will get corroded at a slower rate on exposure to air and water is

Discussion

2202.	The rate constant of the reaction was found to be k=2×10^5 e^-120.28K/T. Its activation energy will be
Answer» The rate constant of the reaction was found to be k=2×10^5 e^-120.28K/T. Its activation energy will be

Discussion

2203.	Where does electrophilic attack take place at in napthalene and why?structures?
Answer» Where does electrophilic attack take place at in napthalene and why?structures?

Discussion

2204.	What types of elements form Ionic Bonds?
Answer» What types of elements form Ionic Bonds?

Discussion

2205.	Which of the following process is used in theextractive metallurgy of magnesium?
Answer» Which of the following process is used in the extractive metallurgy of magnesium?

Discussion

2206.	Calculate the number of molecules in 100 ml of water
Answer» Calculate the number of molecules in 100 ml of water

Discussion

2207.	Calculate the pH of 'C' M Na2S solution in terms of pK1, pK2 and logC . [K1 of H2S=5.0×10−5K2 of H2S=2.5×10−11.
Answer» Calculate the pH of 'C' M $N a_{2} S$ solution in terms of pK1, pK2 and logC . [K1 of $H_{2} S = 5.0 \times 10^{- 5} K_{2}$ of $H_{2} S = 2.5 \times 10^{- 11}$ .

Discussion

2208.	How many distinct terminal alkynes are possible for a compound having molecular formula C6H10? (a) 3(b) 4(c) 5(d) 6
Answer» How many distinct terminal alkynes are possible for a compound having molecular formula C6H10? (a) 3(b) 4(c) 5(d) 6

Discussion

2209.	Which one of the following alkenes will react fastey with H2 under catalytic hydrogenation conditions?\lbrack AIPMT (Prelims)-2005)12
Answer» Which one of the following alkenes will react fastey with H2 under catalytic hydrogenation conditions?\lbrack AIPMT (Prelims)-2005)12

Discussion

2210.	7.What is the process of leaching in case of low grade copper ores?
Answer» 7.What is the process of leaching in case of low grade copper ores?

Discussion

2211.	The set of do not form a Döbereiner’s triad.
Answer» The set of do not form a Döbereiner’s triad.

Discussion

2212.	From the metals-copper, iron, magnesium, sodium and zinc-select a different metal in each case which :(a) does not react with dilute hydrochloric acid.(b) can form 2+ and 3+ ions.(c) has a hydroxide that reacts with both acids and alkalis.(d) does not react with cold water, but reacts with steam when heated.
Answer» From the metals-copper, iron, magnesium, sodium and zinc-select a different metal in each case which : (a) does not react with dilute hydrochloric acid. (b) can form 2⁺ and 3⁺ ions. (c) has a hydroxide that reacts with both acids and alkalis. (d) does not react with cold water, but reacts with steam when heated.

Discussion

2213.	Answer the question below, relating your answers only to salts in the following list :Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water ? (a) What name is given to the water in the compound copper sulphate-5-water ? (b) If copper sulphate-5-water is heated, anhydrous copper sulphate is formed. What is its colour ? (c) By what means, other than heating, could you dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate ? (d) Which one of the salts in the given list is deliquescent ?
Answer» Answer the question below, relating your answers only to salts in the following list : Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water ? (a) What name is given to the water in the compound copper sulphate-5-water ? (b) If copper sulphate-5-water is heated, anhydrous copper sulphate is formed. What is its colour ? (c) By what means, other than heating, could you dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate ? (d) Which one of the salts in the given list is deliquescent ?

2213.

Answer the question below, relating your answers only to salts in the following list :Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water ? (a) What name is given to the water in the compound copper sulphate-5-water ? (b) If copper sulphate-5-water is heated, anhydrous copper sulphate is formed. What is its colour ? (c) By what means, other than heating, could you dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate ? (d) Which one of the salts in the given list is deliquescent ?

Answer»

Answer the question below, relating your answers only to salts in the following list :

Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water ?

(a) What name is given to the water in the compound copper sulphate-5-water ?

(b) If copper sulphate-5-water is heated, anhydrous copper sulphate is formed. What is its colour ?

(c) By what means, other than heating, could you dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate ?

(d) Which one of the salts in the given list is deliquescent ?

Discussion

2214.	A flask having a volume of 250 mL and containing air is heated to 100∘C and sealed. Then the flask is cooled to 25∘C, immersed in water, and opened. What volume of water will be drawn back into the flask, assuming the pressure remaining constant?
Answer» A flask having a volume of 250 mL and containing air is heated to 100 $^{\circ}$ C and sealed. Then the flask is cooled to 25 $^{\circ}$ C, immersed in water, and opened. What volume of water will be drawn back into the flask, assuming the pressure remaining constant?

Discussion

2215.	Question 19Vinegar is a solution of(a) 50% – 60% acetic acid in alcohol(b) 5% – 8% acetic acid in alcohol(c) 5% – 8% acetic acid in water(d) 50% – 60% acetic acid in water
Answer» Question 19 Vinegar is a solution of (a) 50% – 60% acetic acid in alcohol (b) 5% – 8% acetic acid in alcohol (c) 5% – 8% acetic acid in water (d) 50% – 60% acetic acid in water

Discussion

2216.	Argon – 40 and Calcium – 40 are the examples of:
Answer» Argon – 40 and Calcium – 40 are the examples of:

Discussion

2217.	how XeO2 can make a covalent bond as Xe is a nobal gas which already have it's completed octate
Answer» how XeO2 can make a covalent bond as Xe is a nobal gas which already have it's completed octate

Discussion

2218.	How many bonds are formed between two atoms with 6 shared electrons?
Answer» How many bonds are formed between two atoms with 6 shared electrons?

Discussion

2219.	What were the criteria for the classification of elements in Mendeleev's Periodic Table?
Answer» What were the criteria for the classification of elements in Mendeleev's Periodic Table?

Discussion

2220.	When you add a few drops of acetic acid to a testube containing sodium bicarbonate powder, which one of the following is your observation? (a) No reaction takes place. (b) A colourless gas with pungent smell is released with brisk effervescence. (c) A brown coloured gas is released with brisk effervescence. (d) Formation of bubbles of a colourless and odourless gas.
Answer» When you add a few drops of acetic acid to a testube containing sodium bicarbonate powder, which one of the following is your observation? (a) No reaction takes place. (b) A colourless gas with pungent smell is released with brisk effervescence. (c) A brown coloured gas is released with brisk effervescence. (d) Formation of bubbles of a colourless and odourless gas.

Discussion

2221.	A four carbon atoms containing neutral organic compound X reacts with metal to evolve a gas which burns with 'pop' sound. Another four carbon atoms containing carbon compound reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds X and Y are heated together in the presence of a little of concentrated sulphuric acid, then a new compound Z is formed. (a) What is compound X? Also write its formula. (b) What is compound Y? Also write its formula. (c) What is compound Z? Also write its formula. (d) What type of smell is given by compound Z? (e) What is the general name of compounds like Z? (f) What is the general name of the reaction which takes place between X and Y to form Z?
Answer» A four carbon atoms containing neutral organic compound X reacts with metal to evolve a gas which burns with 'pop' sound. Another four carbon atoms containing carbon compound reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds X and Y are heated together in the presence of a little of concentrated sulphuric acid, then a new compound Z is formed. (a) What is compound X? Also write its formula. (b) What is compound Y? Also write its formula. (c) What is compound Z? Also write its formula. (d) What type of smell is given by compound Z? (e) What is the general name of compounds like Z? (f) What is the general name of the reaction which takes place between X and Y to form Z?

2221.

A four carbon atoms containing neutral organic compound X reacts with metal to evolve a gas which burns with 'pop' sound. Another four carbon atoms containing carbon compound reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds X and Y are heated together in the presence of a little of concentrated sulphuric acid, then a new compound Z is formed. (a) What is compound X? Also write its formula. (b) What is compound Y? Also write its formula. (c) What is compound Z? Also write its formula. (d) What type of smell is given by compound Z? (e) What is the general name of compounds like Z? (f) What is the general name of the reaction which takes place between X and Y to form Z?

Answer»

A four carbon atoms containing neutral organic compound X reacts with metal to evolve a gas which burns with 'pop' sound. Another four carbon atoms containing carbon compound reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds X and Y are heated together in the presence of a little of concentrated sulphuric acid, then a new compound Z is formed.

(a) What is compound X? Also write its formula.

(b) What is compound Y? Also write its formula.

(c) What is compound Z? Also write its formula.

(d) What type of smell is given by compound Z?

(e) What is the general name of compounds like Z?

(f) What is the general name of the reaction which takes place between X and Y to form Z?

Discussion

2222.	18. Critical temperature and critical pressure value of four gases are given { Gas \quad Critical Temp. (K) Pressure (atm) { P 33 Which of the following gas (es) cannot be liquefied { at a temperature 100K and pressure 50 atm?
Answer» 18. Critical temperature and critical pressure value of four gases are given { Gas \quad Critical Temp. (K) Pressure (atm) { P 33 Which of the following gas (es) cannot be liquefied { at a temperature 100K and pressure 50 atm?

Discussion

2223.	A student placed a few drops of a liquid over a portion of the red litmus paper as shown here. He observed that the red litmus paper turned blue. The liquid could be :(1) dilute hydrochloric acid(2) dilute sodium hydroxide(3) water(4) dilute acetic acid
Answer» A student placed a few drops of a liquid over a portion of the red litmus paper as shown here. He observed that the red litmus paper turned blue. The liquid could be : (1) dilute hydrochloric acid (2) dilute sodium hydroxide (3) water (4) dilute acetic acid

Discussion

2224.	Why are diamonds extremely hard in nature and have very high melting points?
Answer» Why are diamonds extremely hard in nature and have very high melting points?

Discussion

2225.	in a hypothetical crystal each corner of a cube is occupied by oxygen each edge of the cube is occupied by Na and centre of the cube is occupied by W formula of the crystal is
Answer» in a hypothetical crystal each corner of a cube is occupied by oxygen each edge of the cube is occupied by Na and centre of the cube is occupied by W formula of the crystal is

Discussion

2226.	Which process takes place on chemical bond formation : (a) Decrease is energy (b) Increase in energy (c) No change in energy (d) Attractive and repulsive forces are equal
Answer» Which process takes place on chemical bond formation : (a) Decrease is energy (b) Increase in energy (c) No change in energy (d) Attractive and repulsive forces are equal

Discussion

2227.	Fill in the following blanks with suitable words : (a) The form of carbon which is known as black lead is ___ (b) The form of carbon which is used as a lubricant at high temperature is ___ (c) Compounds of carbon with hydrogen alone are called ___ (d) CnH2n is the general formula of ___ hydrocarbons. (e) Hydrocarbons having the general formula CnH2n−2 are called ___ (f) Ethene and ethyne are examples of ___ hydrocarbons. (g) Ethyne has ___ carbon-hydrogen single bonds. (h) Carbon compounds have usually ___ melting points and boiling points because they are ___ in nature. (i) The property of carbon atoms to form long chains in compounds is called ___ (j) The general formula CnH2n for cycloalkanes is the same as that of ___ (k) The IUPAC name of ethylene is ___ (l) The IUPAC name of acetylene is ___
Answer» Fill in the following blanks with suitable words : (a) The form of carbon which is known as black lead is ___ (b) The form of carbon which is used as a lubricant at high temperature is ___ (c) Compounds of carbon with hydrogen alone are called ___ (d) $C_{n} H_{2 n}$ is the general formula of ___ hydrocarbons. (e) Hydrocarbons having the general formula $C_{n} H_{2 n - 2}$ are called ___ (f) Ethene and ethyne are examples of ___ hydrocarbons. (g) Ethyne has ___ carbon-hydrogen single bonds. (h) Carbon compounds have usually ___ melting points and boiling points because they are ___ in nature. (i) The property of carbon atoms to form long chains in compounds is called ___ (j) The general formula $C_{n} H_{2 n}$ for cycloalkanes is the same as that of ___ (k) The IUPAC name of ethylene is ___ (l) The IUPAC name of acetylene is ___

Discussion

2228.	A. Identify the type of the following reaction: Pb(NO3)2 (s) +Heat→PbO (s)+ 4NO2(g)+O2 (g). B. We will observe the emission of brown fumes in the experiment.
Answer» A. Identify the type of the following reaction: $Pb {(NO 3)}_{2} (s) + Heat \to PbO (s) + 4 {NO}_{2} (g) + O_{2} (g) .$ B. We will observe the emission of brown fumes in the experiment.

2228.

A. Identify the type of the following reaction: Pb(NO3)2 (s) +Heat→PbO (s)+ 4NO2(g)+O2 (g). B. We will observe the emission of brown fumes in the experiment.

Answer»

A. Identify the type of the following reaction:

$Pb {(NO 3)}_{2} (s) + Heat \to PbO (s) + 4 {NO}_{2} (g) + O_{2} (g) .$

B. We will observe the emission of brown fumes in the experiment.

Discussion

2229.	Which of the following anions are orange in colour?
Answer» Which of the following anions are orange in colour?

Discussion

2230.	56.Spin only magnetic moment of Mnx+ ion is root 15B.M.Then what is tge value of X OPTIONS:A)6 B)4 C)2 D)8
Answer» 56.Spin only magnetic moment of Mnx+ ion is root 15B.M.Then what is tge value of X OPTIONS:A)6 B)4 C)2 D)8

Discussion

2231.	There are four solutions of NaCl of the given concentrations : (i) 1.0M(ii) 0.1M(iii) 0.01M(iv) 0.5M Which of the following options represent their correct order of equivalent conductance?
Answer» There are four solutions of NaCl of the given concentrations : (i) 1.0M(ii) 0.1M(iii) 0.01M(iv) 0.5M Which of the following options represent their correct order of equivalent conductance?

Discussion

2232.	What is proton affinity
Answer» What is proton affinity

Discussion

2233.	Read the given statements below and choose the correct option.Statement 1: Isomers have same chemical and physical properties.Statement 2: Isomers have different chemical formula.
Answer» Read the given statements below and choose the correct option. Statement 1: Isomers have same chemical and physical properties. Statement 2: Isomers have different chemical formula.

2233.

Read the given statements below and choose the correct option.Statement 1: Isomers have same chemical and physical properties.Statement 2: Isomers have different chemical formula.

Answer»

Read the given statements below and choose the correct option.

Statement 1: Isomers have same chemical and physical properties.

Statement 2: Isomers have different chemical formula.

Discussion

2234.	What is solvation of halide ion with proton of protic solvent
Answer» What is solvation of halide ion with proton of protic solvent

Discussion

2235.	Lead poisoning in the body can be removed by:
Answer» Lead poisoning in the body can be removed by:

Discussion

2236.	The number of electrons present in the M shell of silicon is _______. 2 4 6 8
Answer» The number of electrons present in the M shell of silicon is _______. 2 4 6 8

2236.

The number of electrons present in the M shell of silicon is _______. 2 4 6 8

Answer»

The number of electrons present in the M shell of silicon is _______.

2
4
6
8

Discussion

2237.	Name two other acids other than sulphuric acid, which can be prepared by using sulphuric acid.
Answer» Name two other acids other than sulphuric acid, which can be prepared by using sulphuric acid.

Discussion

2238.	Why we cannot draw structural isomers for first 3 members of alkane series justify
Answer» Why we cannot draw structural isomers for first 3 members of alkane series justify

Discussion

2239.	What is mole concept?
Answer» What is mole concept?

Discussion

2240.	What is the role that calcium oxide in the preparation of ammonia gas?
Answer» What is the role that calcium oxide in the preparation of ammonia gas?

Discussion

2241.	20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (At. wt. Mg =24)
Answer» 20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (At. wt. Mg =24)

Discussion

2242.	Question 3.2Identify the substance that is oxidized and the substance that is reduced in the following reaction:CuO(s)+H2(g)→Cu(s)+H2O(l)
Answer» Question 3.2 Identify the substance that is oxidized and the substance that is reduced in the following reaction: $CuO(s) + H_{2} (g) \to Cu(s) + H_{2} O(l)$

Discussion

2243.	Establish relationship between Kp & Kc?
Answer» Establish relationship between Kp & Kc?

Discussion

2244.	The ionization energy of nitrogen is more than that of oxygen because
Answer» The ionization energy of nitrogen is more than that of oxygen because

Discussion

2245.	Question 31.Match the acids given in Column I with their correct source given in Column IIColumn IColumn IIA. Lactic acid1. TomatoB. Acetic acid2. LemonC. Citric acid3. VinegarD. Oxalic acid4. Curd
Answer» Question 31. Match the acids given in Column I with their correct source given in Column II $\begin{matrix} Column I & Column II A. Lactic acid & 1. Tomato B. Acetic acid & 2. Lemon C. Citric acid & 3. Vinegar D. Oxalic acid & 4. Curd \end{matrix}$

Discussion

2246.	95. Explain series and parallel combination of capillaries and derive the formula
Answer» 95. Explain series and parallel combination of capillaries and derive the formula

Discussion

2247.	How will the action of dilute hydrochloric acid enable you to distinguish between the following : (a) Sodium carbonate and sodium sulphite (b) Sodium thiosulphate and sodium sulphite.
Answer» How will the action of dilute hydrochloric acid enable you to distinguish between the following : (a) Sodium carbonate and sodium sulphite (b) Sodium thiosulphate and sodium sulphite.

Discussion

2248.	(a) What volume of hydrogen sulphide at STP will burn in oxygen to yield 12.8 g sulphur dioxide according to the equation?2H2S + 3O2 → 2H2O + 2SO2(H = 1, O = 16, S = 32)(b) For the volume of hydrogen sulphide determined in (a) above, what volume of oxygen would be required for complete combustion?
Answer» (a) What volume of hydrogen sulphide at STP will burn in oxygen to yield 12.8 g sulphur dioxide according to the equation? 2H₂S + 3O₂ $\overset{}{\to}$ 2H₂O + 2SO₂ (H = 1, O = 16, S = 32) (b) For the volume of hydrogen sulphide determined in (a) above, what volume of oxygen would be required for complete combustion?

Discussion

2249.	41. Which of the following compounds will give a yellow precipitate with iodine and alkali? 1) acetophenone 2) methyl acetate 3) acetamide 4)2 hydroxy propane
Answer» 41. Which of the following compounds will give a yellow precipitate with iodine and alkali? 1) acetophenone 2) methyl acetate 3) acetamide 4)2 hydroxy propane

Discussion

2250.	The electrochemical cell shown below is a concentration cell, M\|M2+ (Saturated solution of a sparingly soluble salt, MX2)\|\|M2+(0.001 mol dm−3)M. The emf of the cell depends on the difference in concentration of M2+ ions at the two electrodes. The emf of the cell at 298K is 0.059 The solubility product (Ksp:mol3dm−9) of MX2 at 298 K based on the information available the given concentration cell is (take 2.303×R×298/F=0.059V)
Answer» The electrochemical cell shown below is a concentration cell, $M \| M^{2 +}$ (Saturated solution of a sparingly soluble salt, $M X_{2}) \| \| M^{2 +} (0.001 m o l d m^{- 3}) M .$ The emf of the cell depends on the difference in concentration of $M^{2 +}$ ions at the two electrodes. The emf of the cell at 298K is 0.059 The solubility product $(K_{s p} : m o l^{3} d m^{- 9})$ of $M X_{2}$ at 298 K based on the information available the given concentration cell is (take $2.303 \times R \times 298 / F = 0.059 V)$

Discussion

Explore topic-wise InterviewSolutions in .

The metal which will get corroded at a slower rate on exposure to air and water is

The rate constant of the reaction was found to be k=2×10^5 e^-120.28K/T. Its activation energy will be

Where does electrophilic attack take place at in napthalene and why?structures?

What types of elements form Ionic Bonds?

Which of the following process is used in theextractive metallurgy of magnesium?

Calculate the number of molecules in 100 ml of water

Calculate the pH of 'C' M Na2S solution in terms of pK1, pK2 and logC . [K1 of H2S=5.0×10−5K2 of H2S=2.5×10−11.

How many distinct terminal alkynes are possible for a compound having molecular formula C6H10? (a) 3(b) 4(c) 5(d) 6

Which one of the following alkenes will react fastey with H2 under catalytic hydrogenation conditions?\lbrack AIPMT (Prelims)-2005)12

7.What is the process of leaching in case of low grade copper ores?

The set of do not form a Döbereiner’s triad.

A flask having a volume of 250 mL and containing air is heated to 100∘C and sealed. Then the flask is cooled to 25∘C, immersed in water, and opened. What volume of water will be drawn back into the flask, assuming the pressure remaining constant?

Question 19Vinegar is a solution of(a) 50% – 60% acetic acid in alcohol(b) 5% – 8% acetic acid in alcohol(c) 5% – 8% acetic acid in water(d) 50% – 60% acetic acid in water

Argon – 40 and Calcium – 40 are the examples of:

how XeO2 can make a covalent bond as Xe is a nobal gas which already have it's completed octate

How many bonds are formed between two atoms with 6 shared electrons?

What were the criteria for the classification of elements in Mendeleev's Periodic Table?

18. Critical temperature and critical pressure value of four gases are given { Gas \quad Critical Temp. (K) Pressure (atm) { P 33 Which of the following gas (es) cannot be liquefied { at a temperature 100K and pressure 50 atm?

A student placed a few drops of a liquid over a portion of the red litmus paper as shown here. He observed that the red litmus paper turned blue. The liquid could be :(1) dilute hydrochloric acid(2) dilute sodium hydroxide(3) water(4) dilute acetic acid

Why are diamonds extremely hard in nature and have very high melting points?

in a hypothetical crystal each corner of a cube is occupied by oxygen each edge of the cube is occupied by Na and centre of the cube is occupied by W formula of the crystal is

Which process takes place on chemical bond formation : (a) Decrease is energy (b) Increase in energy (c) No change in energy (d) Attractive and repulsive forces are equal

A. Identify the type of the following reaction: Pb(NO3)2 (s) +Heat→PbO (s)+ 4NO2(g)+O2 (g). B. We will observe the emission of brown fumes in the experiment.

Which of the following anions are orange in colour?

56.Spin only magnetic moment of Mnx+ ion is root 15B.M.Then what is tge value of X OPTIONS:A)6 B)4 C)2 D)8

There are four solutions of NaCl of the given concentrations : (i) 1.0M(ii) 0.1M(iii) 0.01M(iv) 0.5M Which of the following options represent their correct order of equivalent conductance?

What is proton affinity

Read the given statements below and choose the correct option.Statement 1: Isomers have same chemical and physical properties.Statement 2: Isomers have different chemical formula.

What is solvation of halide ion with proton of protic solvent

Lead poisoning in the body can be removed by:

The number of electrons present in the M shell of silicon is _______. 2 4 6 8

Name two other acids other than sulphuric acid, which can be prepared by using sulphuric acid.

Why we cannot draw structural isomers for first 3 members of alkane series justify

What is mole concept?

What is the role that calcium oxide in the preparation of ammonia gas?

20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (At. wt. Mg =24)

Question 3.2Identify the substance that is oxidized and the substance that is reduced in the following reaction:CuO(s)+H2(g)→Cu(s)+H2O(l)

Establish relationship between Kp & Kc?

The ionization energy of nitrogen is more than that of oxygen because

Question 31.Match the acids given in Column I with their correct source given in Column IIColumn IColumn IIA. Lactic acid1. TomatoB. Acetic acid2. LemonC. Citric acid3. VinegarD. Oxalic acid4. Curd

95. Explain series and parallel combination of capillaries and derive the formula

How will the action of dilute hydrochloric acid enable you to distinguish between the following : (a) Sodium carbonate and sodium sulphite (b) Sodium thiosulphate and sodium sulphite.

41. Which of the following compounds will give a yellow precipitate with iodine and alkali? 1) acetophenone 2) methyl acetate 3) acetamide 4)2 hydroxy propane