15280 + Interview Questions in Chemistry Page 16 InterviewSolution

751.	Define tertiary treatment.
Answer» Define tertiary treatment.

Discussion

752.	Fill in the blanks. (a) Propane and ethane are ..... (homologous, isomers) (b) A saturated hydrocarbon does not participate in a/an ...... reaction. (substitution, addition) (c) Succeeding members of a homologous series differ by..... (CH, CH2, CH3) (d) As the molecular masses of hydrocarbons increase, their boiling points and melting points ....... (increase, decrease) (e) C25H52 and C50H102 belong to .... homologous series. (the same, different) (f) CO is an ...... compound. (organic, inorganic) (g) The chemical properties of an organic compound are largely decided by the ..... and the physical properties of an organic compound are largely decided by the ...... (functional group, number of carbon atoms) (h) CHO is the functional group of an ...... (alcohol, aldehyde) (i) The root in the IUPAC name of an organic compound depends upon the number of carbon atoms in ......... (any chain, principal chain) (j) But -1-ene and but -2-ene are examples of .... isomerism. (chain,position, functional)
Answer» Fill in the blanks. (a) Propane and ethane are ..... (homologous, isomers) (b) A saturated hydrocarbon does not participate in a/an ...... reaction. (substitution, addition) (c) Succeeding members of a homologous series differ by..... ( $C H, C H_{2}, C H_{3}$ ) (d) As the molecular masses of hydrocarbons increase, their boiling points and melting points ....... (increase, decrease) (e) $C_{25} H_{52}$ and $C_{50} H_{102}$ belong to .... homologous series. (the same, different) (f) CO is an ...... compound. (organic, inorganic) (g) The chemical properties of an organic compound are largely decided by the ..... and the physical properties of an organic compound are largely decided by the ...... (functional group, number of carbon atoms) (h) CHO is the functional group of an ...... (alcohol, aldehyde) (i) The root in the IUPAC name of an organic compound depends upon the number of carbon atoms in ......... (any chain, principal chain) (j) But -1-ene and but -2-ene are examples of .... isomerism. (chain,position, functional)

752.

Fill in the blanks. (a) Propane and ethane are ..... (homologous, isomers) (b) A saturated hydrocarbon does not participate in a/an ...... reaction. (substitution, addition) (c) Succeeding members of a homologous series differ by..... (CH, CH2, CH3) (d) As the molecular masses of hydrocarbons increase, their boiling points and melting points ....... (increase, decrease) (e) C25H52 and C50H102 belong to .... homologous series. (the same, different) (f) CO is an ...... compound. (organic, inorganic) (g) The chemical properties of an organic compound are largely decided by the ..... and the physical properties of an organic compound are largely decided by the ...... (functional group, number of carbon atoms) (h) CHO is the functional group of an ...... (alcohol, aldehyde) (i) The root in the IUPAC name of an organic compound depends upon the number of carbon atoms in ......... (any chain, principal chain) (j) But -1-ene and but -2-ene are examples of .... isomerism. (chain,position, functional)

Answer»

Fill in the blanks.

(a) Propane and ethane are ..... (homologous, isomers)

(b) A saturated hydrocarbon does not participate in a/an ...... reaction. (substitution, addition)

(c) Succeeding members of a homologous series differ by..... ( $C H, C H_{2}, C H_{3}$ )

(d) As the molecular masses of hydrocarbons increase, their boiling points and melting points ....... (increase, decrease)

(e) $C_{25} H_{52}$ and $C_{50} H_{102}$ belong to .... homologous series. (the same, different)

(f) CO is an ...... compound. (organic, inorganic)

(g) The chemical properties of an organic compound are largely decided by the ..... and the physical properties of an organic compound are largely decided by the ...... (functional group, number of carbon atoms)

(h) CHO is the functional group of an ...... (alcohol, aldehyde)

(i) The root in the IUPAC name of an organic compound depends upon the number of carbon atoms in ......... (any chain, principal chain)

(j) But -1-ene and but -2-ene are examples of .... isomerism. (chain,position, functional)

Discussion

753.	Which of the following is the correct order of melting points of alkanes?
Answer» Which of the following is the correct order of melting points of alkanes?

Discussion

754.	Why Aqua-Regia is a mixture of only HCL and HNO3 and not of other acids?
Answer» Why Aqua-Regia is a mixture of only HCL and HNO₃and not of other acids?

Discussion

755.	Which of the following reactions shows the acidic character of nitric acid?
Answer» Which of the following reactions shows the acidic character of nitric acid?

Discussion

756.	How many covalent bonds does C3H8 has?
Answer» How many covalent bonds does $C_{3} H_{8}$ has?

Discussion

757.	25. The ionization constant of a weak electrolyte HA is 36*10- while the equivalent conductance of its 100 M the equivalent conductance of the electrolyte at infinite dilution will be
Answer» 25. The ionization constant of a weak electrolyte HA is 36*10- while the equivalent conductance of its 100 M the equivalent conductance of the electrolyte at infinite dilution will be

Discussion

758.	Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?
Answer» Hydrogen and oxygen combine in the ratio of $1 : 8$ by mass to form water. What mass of oxygen gas would be required to react completely with $3 g$ of hydrogen gas?

Discussion

759.	Which element is more similar to carbon :1.Mg2.Mn3.Pb4.Sn
Answer» Which element is more similar to carbon : 1.Mg 2.Mn 3.Pb 4.Sn

Discussion

760.	Convert acetic acid to ethanol amine.
Answer» Convert acetic acid to ethanol amine.

Discussion

761.	For a molecule containing pie bonds, lone pairs, then why is it said that only sigma bonds determine its shape although there is no effect on it s geometry ?
Answer» For a molecule containing pie bonds, lone pairs, then why is it said that only sigma bonds determine its shape although there is no effect on it s geometry ?

Discussion

762.	Why NaOH formed near cathode
Answer» Why NaOH formed near cathode

Discussion

763.	Aqueous solution or sodium carbonate extract of the salt is acidified with acetic acid . On addition of BaCl2 to it ,a white precipitate is formed which is insoluble in conc. HCl or conc. HNO3. This indicates the presence of:
Answer» Aqueous solution or sodium carbonate extract of the salt is acidified with acetic acid . On addition of $B a C l_{2}$ to it ,a white precipitate is formed which is insoluble in conc. $H C l$ or conc. $H N O_{3}$ . This indicates the presence of:

Discussion

764.	50.0 kg of N(g) and 10.0 kg of H2(g) are mixed to produce NH2(g). Calculate the moles ofNH.(g) formed. Identify the limiting reagent in the production of NH3, in this situation.
Answer» 50.0 kg of N(g) and 10.0 kg of H2(g) are mixed to produce NH2(g). Calculate the moles ofNH.(g) formed. Identify the limiting reagent in the production of NH3, in this situation.

Discussion

765.	41 What is the difference between Chlorophenylmethane and Chloromethyl benzene?
Answer» 41 What is the difference between Chlorophenylmethane and Chloromethyl benzene?

Discussion

766.	Which of the following has the highest melting point?
Answer» Which of the following has the highest melting point?

Discussion

767.	Give the name and atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference between the numbers of total p and total s electrons .
Answer» Give the name and atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference between the numbers of total p and total s electrons .

Discussion

768.	Which of the following reactions does not take place during leaching for concentration of bauxite?
Answer» Which of the following reactions does not take place during leaching for concentration of bauxite?

Discussion

769.	(a)How would you name the following compounds?(i) CH3−CH2−Br(b)How would you name the following compounds?(c)How would you name the following compounds?
Answer» (a) How would you name the following compounds? (i) $C H_{3} - C H_{2} - B r$ (b) How would you name the following compounds? (c) How would you name the following compounds?

Discussion

770.	Which of the following compounds are ionic and which are covalent? Urea, Cane sugar, Hydrogen chloride, Sodium chloride, Ammonium chloride, Carbon tetrachloride, Ammonia, Alcohol, Magnesium chloride.
Answer» Which of the following compounds are ionic and which are covalent? Urea, Cane sugar, Hydrogen chloride, Sodium chloride, Ammonium chloride, Carbon tetrachloride, Ammonia, Alcohol, Magnesium chloride.

Discussion

771.	When aldehyde reacts with magnesium what product we will get
Answer» When aldehyde reacts with magnesium what product we will get

Discussion

772.	C4H9Cl(A)KOH−−−−−−→(alcoholic)BBr2−−−→CCl4CNaNH2−−−−−→(2 equiv)D[Ag(NH3)2]+−−−−−−−−→ppt.Number of secondary hydrogen atoms in (A) is:
Answer» $C_{4} H_{9} C l (A) K O H - ----- \to (alcoholic) B B r_{2} - -- \to C C l_{4} C N a N H_{2} - ---- \to (2 equiv) D [A g (N H_{3})_{2}]^{+} - ------- \to ppt.$ Number of secondary hydrogen atoms in (A) is:

Discussion

773.	If the ionic conductance of Na+ and So4^2- are 50.11 and 80 S cm^2 equiv^-1 respectively, then the molar conductance (S cm^2 mol^-1), and equivalent conductance (S cm^2 equiv^-1) of Na2SO4 are respectively(1) 130.11, 130.11(2) 260.22, 260.22(3) 130.11, 260.22(4) 260.22, 130.11
Answer» If the ionic conductance of Na+ and So4^2- are 50.11 and 80 S cm^2 equiv^-1 respectively, then the molar conductance (S cm^2 mol^-1), and equivalent conductance (S cm^2 equiv^-1) of Na2SO4 are respectively (1) 130.11, 130.11 (2) 260.22, 260.22 (3) 130.11, 260.22 (4) 260.22, 130.11

Discussion

774.	Which of the following is Dobereiner's triad?
Answer» Which of the following is Dobereiner's triad?

Discussion

775.	In the third period, which is the most metallic and non-metallic element?
Answer» In the third period, which is the most metallic and non-metallic element?

Discussion

776.	What is the shape of CH4 molecule ?
Answer» What is the shape of $C H_{4}$ molecule ?

Discussion

777.	CO2+NaOH→H2O+X Identify X.
Answer» ${C O}_{2} + N a O H \to H_{2} O + X$ Identify X.

777.

CO2+NaOH→H2O+X Identify X.

Answer»

${C O}_{2} + N a O H \to H_{2} O + X$

Identify X.

Discussion

778.	17. Is neutralisation a type of double displacement reaction? 1. CH3CH2CH2COOH 2. CH3CH2COOH 3. CH3CH2COOH + CO2 + H2O 4. CH3CH2COOH + HCOOH
Answer» 17. Is neutralisation a type of double displacement reaction? 1. CH3CH2CH2COOH 2. CH3CH2COOH 3. CH3CH2COOH + CO2 + H2O 4. CH3CH2COOH + HCOOH

Discussion

779.	What are the essential ingredients of toothpaste, and what is the function of each?
Answer» What are the essential ingredients of toothpaste, and what is the function of each?

Discussion

780.	What happens when carbon dioxide is passed through lime water give equation also also also explain by giving the chemical equation as to what would happen if excess of carbon dioxide is passed
Answer» What happens when carbon dioxide is passed through lime water give equation also also also explain by giving the chemical equation as to what would happen if excess of carbon dioxide is passed

Discussion

781.	The correct structure of 2,6−Dimethyl-dec-4-ene is
Answer» The correct structure of $2, 6 - Dimethyl-dec-4-ene$ is

Discussion

782.	3.How to calculate no. of replaceable hydrogen ions?
Answer» 3.How to calculate no. of replaceable hydrogen ions?

Discussion

783.	25. The chemical and the reaction conditions required for the preparation of ethane are (A)C2H5I, Zn-Cu/C2H5OH (B)CH3COONa, NaOH, CaO, Δ
Answer» 25. The chemical and the reaction conditions required for the preparation of ethane are (A)C2H5I, Zn-Cu/C2H5OH (B)CH3COONa, NaOH, CaO, Δ

Discussion

784.	What is the pressure exerted by 16 gram of Oxygen gas enclosed in 1dm3 flask at 25∘C?
Answer» What is the pressure exerted by 16 gram of Oxygen gas enclosed in $1 d m^{3}$ flask at $25^{\circ} C$ ?

Discussion

785.	What colours do the following indicators turn when added to an acid (such as hydrochloric acid) ? (a) litmus (b) methyl orange
Answer» What colours do the following indicators turn when added to an acid (such as hydrochloric acid) ? (a) litmus (b) methyl orange

785.

What colours do the following indicators turn when added to an acid (such as hydrochloric acid) ? (a) litmus (b) methyl orange

Answer»

What colours do the following indicators turn when added to an acid (such as hydrochloric acid) ?

(a) litmus

(b) methyl orange

Discussion

786.	How many carbon atoms are there in TNT (Trinitrotoluene) compond?
Answer» How many carbon atoms are there in TNT (Trinitrotoluene) compond?

Discussion

787.	How many paired electrons are present in oxygen molecule?
Answer» How many paired electrons are present in oxygen molecule?

Discussion

788.	5g of crystalline salt rendered anhydrous; lost 1.8g of water. The formula weight of the anhydrous salts is 160. The number of water molecules of crystallization is:
Answer» 5g of crystalline salt rendered anhydrous; lost 1.8g of water. The formula weight of the anhydrous salts is 160. The number of water molecules of crystallization is:

Discussion

789.	A chemical reaction involves ______.
Answer» A chemical reaction involves ______.

Discussion

790.	What is the maximum number of electrons present in the L shell ?
Answer» What is the maximum number of electrons present in the L shell ?

Discussion

791.	Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, equality sign)a. An................... is drawn in between the reactants and products while writing the equation for a chemical reation.b. Rusting of iron is a............. chemical change.c. The spoiling of food is a chemical change which is recognized from the generation of certain................ due to it.d. A colourless solution of calcium hydroxide in a test tube turns..............on blowing in it through a blow tube for some time.e. The white particles of baking soda disappear when put in lemon juice. This means that it is a.....................change.f. Oxygen is a....................... in respiration.g. Sodium chloride is....................compound while hydrogen chlorid is........................ compound.h. Electron.............................. is complete in each hydrogen in a hydrogen molecule.i. Chlorine (Cl2) molecule is formed by..................... of electrons between two chlorine atoms.
Answer» Complete the statement by filling the gaps using appropriate term from the terms given in the bracket. (slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, equality sign) a. An................... is drawn in between the reactants and products while writing the equation for a chemical reation. b. Rusting of iron is a............. chemical change. c. The spoiling of food is a chemical change which is recognized from the generation of certain................ due to it. d. A colourless solution of calcium hydroxide in a test tube turns..............on blowing in it through a blow tube for some time. e. The white particles of baking soda disappear when put in lemon juice. This means that it is a.....................change. f. Oxygen is a....................... in respiration. g. Sodium chloride is....................compound while hydrogen chlorid is........................ compound. h. Electron.............................. is complete in each hydrogen in a hydrogen molecule. i. Chlorine (Cl₂) molecule is formed by..................... of electrons between two chlorine atoms.

Discussion

792.	why we cannot determine the exact atomic radii of an ato
Answer» why we cannot determine the exact atomic radii of an ato

Discussion

793.	(a) What type of bond is formed between two atoms, when the difference in electronegativity between them is(i) high, (ii) low, (iii) zero?(b) Separate the following compounds into three categories- ionic, polar and covalent compounds; N2, NH4Cl, NH3, NO, NH4NO3, NCl3.
Answer» (a) What type of bond is formed between two atoms, when the difference in electronegativity between them is (i) high, (ii) low, (iii) zero? (b) Separate the following compounds into three categories- ionic, polar and covalent compounds; N₂, NH₄Cl, NH₃, NO, NH₄NO₃, NCl₃.

Discussion

794.	35.4 mL of HCl is required for the neutralization of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is
Answer» 35.4 mL of HCl is required for the neutralization of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is

Discussion

795.	Suppose that A and B form the compounds B2A3 and B2A3.If 0.05 mole of B2A3 weighs 9gm and 0.1 mole of B2A weighs 10gm , the atomic weight of A and B respectively are
Answer» Suppose that A and B form the compounds B2A3 and B2A3.If 0.05 mole of B2A3 weighs 9gm and 0.1 mole of B2A weighs 10gm , the atomic weight of A and B respectively are

Discussion

796.	Ammonia reacts with a monobasic acid (A) to form a salt (B). B decomposes at about 250°C to give two products (C) and (D), leaving no residue. The oxide (D) is a liquid at room temperature and neutral to moist litmus, while the gas (C) is a neutral oxide. Identify A, B, C, D. Write the balanced equations involved in the above process.
Answer» Ammonia reacts with a monobasic acid (A) to form a salt (B). B decomposes at about 250°C to give two products (C) and (D), leaving no residue. The oxide (D) is a liquid at room temperature and neutral to moist litmus, while the gas (C) is a neutral oxide. Identify A, B, C, D. Write the balanced equations involved in the above process.

Discussion

797.	1-Chloropropane and 2-Chloropropane are:
Answer» 1-Chloropropane and 2-Chloropropane are:

Discussion

798.	How is the souring of milk a chemical change?
Answer» How is the souring of milk a chemical change?

Discussion

799.	What is a balanced chemical equation? Why should chemical equations be balanced?
Answer» What is a balanced chemical equation? Why should chemical equations be balanced?

Discussion

800.	Nature of the bond in HCl is
Answer» Nature of the bond in HCl is

Discussion

Explore topic-wise InterviewSolutions in .

Define tertiary treatment.

Which of the following is the correct order of melting points of alkanes?

Why Aqua-Regia is a mixture of only HCL and HNO3 and not of other acids?

Which of the following reactions shows the acidic character of nitric acid?

How many covalent bonds does C3H8 has?

25. The ionization constant of a weak electrolyte HA is 36*10- while the equivalent conductance of its 100 M the equivalent conductance of the electrolyte at infinite dilution will be

Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

Which element is more similar to carbon :1.Mg2.Mn3.Pb4.Sn

Convert acetic acid to ethanol amine.

For a molecule containing pie bonds, lone pairs, then why is it said that only sigma bonds determine its shape although there is no effect on it s geometry ?

Why NaOH formed near cathode

Aqueous solution or sodium carbonate extract of the salt is acidified with acetic acid . On addition of BaCl2 to it ,a white precipitate is formed which is insoluble in conc. HCl or conc. HNO3. This indicates the presence of:

50.0 kg of N(g) and 10.0 kg of H2(g) are mixed to produce NH2(g). Calculate the moles ofNH.(g) formed. Identify the limiting reagent in the production of NH3, in this situation.

41 What is the difference between Chlorophenylmethane and Chloromethyl benzene?

Which of the following has the highest melting point?

Give the name and atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference between the numbers of total p and total s electrons .

Which of the following reactions does not take place during leaching for concentration of bauxite?

(a)How would you name the following compounds?(i) CH3−CH2−Br(b)How would you name the following compounds?(c)How would you name the following compounds?

Which of the following compounds are ionic and which are covalent? Urea, Cane sugar, Hydrogen chloride, Sodium chloride, Ammonium chloride, Carbon tetrachloride, Ammonia, Alcohol, Magnesium chloride.

When aldehyde reacts with magnesium what product we will get

C4H9Cl(A)KOH−−−−−−→(alcoholic)BBr2−−−→CCl4CNaNH2−−−−−→(2 equiv)D[Ag(NH3)2]+−−−−−−−−→ppt.Number of secondary hydrogen atoms in (A) is:

If the ionic conductance of Na+ and So4^2- are 50.11 and 80 S cm^2 equiv^-1 respectively, then the molar conductance (S cm^2 mol^-1), and equivalent conductance (S cm^2 equiv^-1) of Na2SO4 are respectively(1) 130.11, 130.11(2) 260.22, 260.22(3) 130.11, 260.22(4) 260.22, 130.11

Which of the following is Dobereiner's triad?

In the third period, which is the most metallic and non-metallic element?

What is the shape of CH4 molecule ?

CO2+NaOH→H2O+X Identify X.

17. Is neutralisation a type of double displacement reaction? 1. CH3CH2CH2COOH 2. CH3CH2COOH 3. CH3CH2COOH + CO2 + H2O 4. CH3CH2COOH + HCOOH

What are the essential ingredients of toothpaste, and what is the function of each?

What happens when carbon dioxide is passed through lime water give equation also also also explain by giving the chemical equation as to what would happen if excess of carbon dioxide is passed

The correct structure of 2,6−Dimethyl-dec-4-ene is

3.How to calculate no. of replaceable hydrogen ions?

25. The chemical and the reaction conditions required for the preparation of ethane are (A)C2H5I, Zn-Cu/C2H5OH (B)CH3COONa, NaOH, CaO, Δ

What is the pressure exerted by 16 gram of Oxygen gas enclosed in 1dm3 flask at 25∘C?

What colours do the following indicators turn when added to an acid (such as hydrochloric acid) ? (a) litmus (b) methyl orange

How many carbon atoms are there in TNT (Trinitrotoluene) compond?

How many paired electrons are present in oxygen molecule?

5g of crystalline salt rendered anhydrous; lost 1.8g of water. The formula weight of the anhydrous salts is 160. The number of water molecules of crystallization is:

A chemical reaction involves ______.

What is the maximum number of electrons present in the L shell ?

why we cannot determine the exact atomic radii of an ato

(a) What type of bond is formed between two atoms, when the difference in electronegativity between them is(i) high, (ii) low, (iii) zero?(b) Separate the following compounds into three categories- ionic, polar and covalent compounds; N2, NH4Cl, NH3, NO, NH4NO3, NCl3.

35.4 mL of HCl is required for the neutralization of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is

Suppose that A and B form the compounds B2A3 and B2A3.If 0.05 mole of B2A3 weighs 9gm and 0.1 mole of B2A weighs 10gm , the atomic weight of A and B respectively are

1-Chloropropane and 2-Chloropropane are:

How is the souring of milk a chemical change?

What is a balanced chemical equation? Why should chemical equations be balanced?

Nature of the bond in HCl is