10223 + Interview Questions in Chemistry Page 22 InterviewSolution

1051.	We can show that iron is more reactive than copper :(1) by preparing copper sulphate solution and dipping the iron strip in it.(2) by dipping both the strips in water for some time.(3) by preparing iron sulphate solution and dipping copper strip in it.(4) by heating both iron and copper strip.
Answer» We can show that iron is more reactive than copper : (1) by preparing copper sulphate solution and dipping the iron strip in it. (2) by dipping both the strips in water for some time. (3) by preparing iron sulphate solution and dipping copper strip in it. (4) by heating both iron and copper strip.

Discussion

1052.	What mass of nitrogen, N2, will contain the same number of molecules as 1.8 g of water, H2O? (Atomic masses: N = 14 u; H = 1 u; O = 16 u)
Answer» What mass of nitrogen, N₂, will contain the same number of molecules as 1.8 g of water, H₂O? (Atomic masses: N = 14 u; H = 1 u; O = 16 u)

Discussion

1053.	12. Out of Cr+2 and Cr+3,which one is stable in aqueous solution?
Answer» 12. Out of Cr+2 and Cr+3,which one is stable in aqueous solution?

Discussion

1054.	Green vitriol is the common name of .
Answer» Green vitriol is the common name of .

Discussion

1055.	Calculate the number of Aluminium ions present in 0.051 gram of Aluminium oxide?
Answer» Calculate the number of Aluminium ions present in 0.051 gram of Aluminium oxide?

Discussion

1056.	A burning candle shows both physical and chemical changes. Explain ?
Answer» A burning candle shows both physical and chemical changes. Explain ?

Discussion

1057.	if xyz=1 then show that {[1+x+y^-1]^-1}+{[1+y+z^-1]^-1}+{[1+z+x^-1]^-1}=1
Answer» if xyz=1 then show that {[1+x+y^-1]^-1}+{[1+y+z^-1]^-1}+{[1+z+x^-1]^-1}=1

Discussion

1058.	How should antibonding be represented between 2 atomic orbitals?
Answer» How should antibonding be represented between 2 atomic orbitals?

Discussion

1059.	Question 3What type of mixtures are separated by the technique of crystallisation?
Answer» Question 3 What type of mixtures are separated by the technique of crystallisation?

Discussion

1060.	The pungent odour gas in the previous reaction is ___.
Answer» The pungent odour gas in the previous reaction is ___.

Discussion

1061.	Question 42 A silver ornament of mass ‘m’ gram is polished with gold equivalent to 1% of the mass of silver. Compute the ration of the number of atoms of gold and silver in the ornament.
Answer» Question 42 A silver ornament of mass ‘m’ gram is polished with gold equivalent to $1 %$ of the mass of silver. Compute the ration of the number of atoms of gold and silver in the ornament.

Discussion

1062.	What is non uniform velocity
Answer» What is non uniform velocity

Discussion

1063.	ntAn electron moving along a horizontal line with respect to observer and towards north. Due to Earth magnetic field it deflect towards east then position of the observern ntA)NHS 2)SHS 3)at equator 4) nonen
Answer» ntAn electron moving along a horizontal line with respect to observer and towards north. Due to Earth magnetic field it deflect towards east then position of the observern ntA)NHS 2)SHS 3)at equator 4) nonen

Discussion

1064.	Which shell of an atom can accommodate a maximum of: (a) 8 electrons (b) 32 electrons?
Answer» Which shell of an atom can accommodate a maximum of: (a) 8 electrons (b) 32 electrons?

Discussion

1065.	What are the differences between fairly soluble and partially soluble in solubility?
Answer» What are the differences between fairly soluble and partially soluble in solubility?

Discussion

1066.	Which of the following can be separated by using a separating funnel and which cannot be separated by using a separating funnel?(i) water and kerosene mixture(ii) water and acetone mixture(Give reasons for your answer.Which method is better for recovering sugar from sugar solution: evaporation or crystallisation? Give reason for your answer.
Answer» Which of the following can be separated by using a separating funnel and which cannot be separated by using a separating funnel? (i) water and kerosene mixture (ii) water and acetone mixture (Give reasons for your answer. Which method is better for recovering sugar from sugar solution: evaporation or crystallisation? Give reason for your answer.

Discussion

1067.	What is the Empirical Formula for Sugar?
Answer» What is the Empirical Formula for Sugar?

Discussion

1068.	Who among these was the first to theorize the structure of atoms?
Answer» Who among these was the first to theorize the structure of atoms?

Discussion

1069.	Explain mass energy.
Answer» Explain mass energy.

Discussion

1070.	One of the drawbacks of Rutherford's Atomic Model is that it failed to explain the ______ atoms.
Answer» One of the drawbacks of Rutherford's Atomic Model is that it failed to explain the ______ atoms.

Discussion

1071.	How number of equvalents are related to Normailty and Volume
Answer» How number of equvalents are related to Normailty and Volume

Discussion

1072.	Standard electrode potentials of three metals X, Y and Z are –1.2 V, +0.5 V and –3.0 V respectively. The reducing power of these metals will be:
Answer» Standard electrode potentials of three metals $X, Y$ and $Z$ are $- 1.2 V, + 0.5 V$ and $- 3.0 V$ respectively. The reducing power of these metals will be:

Discussion

1073.	Among protium, deuterium and tritium which one has more bond energy
Answer» Among protium, deuterium and tritium which one has more bond energy

Discussion

1074.	Which of the following relations can give hydrogen gas 1. Zinc +conc. H2SO4 2. C4 + dil. H2SO4 3. Mn + dil. HNO3 4. Pb+ dil. HNO3
Answer» Which of the following relations can give hydrogen gas 1. Zinc +conc. H2SO4 2. C4 + dil. H2SO4 3. Mn + dil. HNO3 4. Pb+ dil. HNO3

Discussion

1075.	Question 4 (b) Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?
Answer» Question 4 (b) Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?

Discussion

1076.	find the number of electrons emitted per second by a 24W source of monochromatic light of wavelength 6600Ang, assuming 3% efficiency for photoelectric effec
Answer» find the number of electrons emitted per second by a 24W source of monochromatic light of wavelength 6600Ang, assuming 3% efficiency for photoelectric effec

Discussion

1077.	due to which force is the first four members C1 to C4 are gases C5 to C17 are liquids and those containing 18 carbon atoms or more solids at 298 Kelvin .explain.
Answer» due to which force is the first four members C1 to C4 are gases C5 to C17 are liquids and those containing 18 carbon atoms or more solids at 298 Kelvin .explain.

Discussion

1078.	What is the nuclear charge of a carbon atom?
Answer» What is the nuclear charge of a carbon atom?

Discussion

1079.	An atom of an element has 11 protons, 11 electrons and 12 neutrons. What is the the atomic mass?
Answer» An atom of an element has 11 protons, 11 electrons and 12 neutrons. What is the the atomic mass?

Discussion

1080.	why non metals dont react with acid
Answer» why non metals dont react with acid

Discussion

1081.	Define destructive distillation of coal. What are the byproducts formed on destructive distillation of coal?
Answer» Define destructive distillation of coal. What are the byproducts formed on destructive distillation of coal?

Discussion

1082.	For the reaction N205(g)-→ 2NO2(g) +02(g)the value of rate of disappearance of N2O, is givenas 6.25 x 103 mol L's. The rate of formationof NO, and O is given respectively as -(1) 1.25 x 10 mol L's and6.25 x 103 mol L's2) 6.25 x 10 mol L's1 and6.25 10-3 mol L-1s-(3) 1.25 10-2 mol L-is-1 and3.125 x 1o mol L's1(4) 6.25 10-3 mol L-1s-1 and3.125 x 103 mol L 's1
Answer» For the reaction N205(g)-→ 2NO2(g) +02(g)the value of rate of disappearance of N2O, is givenas 6.25 x 103 mol L's. The rate of formationof NO, and O is given respectively as -(1) 1.25 x 10 mol L's and6.25 x 103 mol L's2) 6.25 x 10 mol L's1 and6.25 10-3 mol L-1s-(3) 1.25 10-2 mol L-is-1 and3.125 x 1o mol L's1(4) 6.25 10-3 mol L-1s-1 and3.125 x 103 mol L 's1

Discussion

1083.	29 The equivalent conductance of 22 Solution of aweak monobasic acid is 8.0 mhos cm2 and atinfinite dilution is 400 mhos cm2. The dissociationconstant of this acid is \lbrack AIPMT (Prelims)-20091(2) 6.25 x 104(1) 1.25 x 10-6(4) 1.25 x 10-5(3) 1.25 x 10-4
Answer» 29 The equivalent conductance of 22 Solution of aweak monobasic acid is 8.0 mhos cm2 and atinfinite dilution is 400 mhos cm2. The dissociationconstant of this acid is \lbrack AIPMT (Prelims)-20091(2) 6.25 x 104(1) 1.25 x 10-6(4) 1.25 x 10-5(3) 1.25 x 10-4

Discussion

1084.	What are (i) Ionic compounds, and (ii) Molecular compounds? Give two examples of each type of compounds.
Answer» What are (i) Ionic compounds, and (ii) Molecular compounds? Give two examples of each type of compounds.

Discussion

1085.	Soaps are sodium or potassium salts of long chain ___ .
Answer» Soaps are sodium or potassium salts of long chain ___ .

Discussion

1086.	Standard entropies of X2, Y2 and XY3 are 60, 40 and 50 JK-1 mol-1 respectively. For the reaction 1/2X2+3/2Y2→ XY3, △ H=-30KJto be at equilibrium, the temperature should be
Answer» Standard entropies of X2, Y2 and XY3 are 60, 40 and 50 JK-1 mol-1 respectively. For the reaction 1/2X2+3/2Y2→ XY3, △ H=-30KJto be at equilibrium, the temperature should be

Discussion

1087.	What is a valence shell?
Answer» What is a valence shell?

Discussion

1088.	From the given metal nitrides how many will produce ammonia on hydrolysis?AlN,Mg3N2,Li3N,Ba3N2,Ca3N2
Answer» From the given metal nitrides how many will produce ammonia on hydrolysis? $A l N, M g_{3} N_{2}, L i_{3} N, B a_{3} N_{2}, C a_{3} N_{2}$

Discussion

1089.	What is the oxidation number of the cetral metal in the complex K2[OsCl5N]?
Answer» What is the oxidation number of the cetral metal in the complex $K_{2} [O s C l_{5} N]$ ?

Discussion

1090.	Which among the given options is used to bleach cotton fabrics?
Answer» Which among the given options is used to bleach cotton fabrics?

Discussion

1091.	What is the minimum calorie intake for an urban person?
Answer» What is the minimum calorie intake for an urban person?

Discussion

1092.	how to balance chemical equation c6h6+o2 arrow mark co2+h20but. i tried and in RHS why should we put 12 next to carbon instead of that we can put put 3 so that makes 6
Answer» how to balance chemical equation c6h6+o2 arrow mark co2+h20 but. i tried and in RHS why should we put 12 next to carbon instead of that we can put put 3 so that makes 6

Discussion

1093.	The number of atoms in 1 mole is 6 ×1023. Then the number of sodium ions in 19.5 gram of Sodium chloride will be?
Answer» The number of atoms in 1 mole is 6 ×10²³. Then the number of sodium ions in 19.5 gram of Sodium chloride will be?

Discussion

1094.	What will happen if there will be no electrons in an atom?
Answer» What will happen if there will be no electrons in an atom?

Discussion

1095.	What produces more severe burns boiling water or steam)( answer in short)
Answer» What produces more severe burns boiling water or steam)( answer in short)

Discussion

1096.	The ratio of number of molecules in equal weights of H2, He and CH4 is
Answer» The ratio of number of molecules in equal weights of $H_{2}$ , He and $C H_{4}$ is

Discussion

1097.	Explain the following :(a) Electrovalent compounds conduct electricity in molten or aqueous state.(b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points.(c) Atoms combine by transfer and sharing of electrons (s).
Answer» Explain the following : (a) Electrovalent compounds conduct electricity in molten or aqueous state. (b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points. (c) Atoms combine by transfer and sharing of electrons (s).

1097.

Explain the following :(a) Electrovalent compounds conduct electricity in molten or aqueous state.(b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points.(c) Atoms combine by transfer and sharing of electrons (s).

Answer»

Explain the following :

(a) Electrovalent compounds conduct electricity in molten or aqueous state.

(b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points.

(c) Atoms combine by transfer and sharing of electrons (s).

Discussion

1098.	Identify the products of the given reaction.Na2CO3(aq)+H2SO4(aq)→?
Answer» Identify the products of the given reaction. ${Na}_{2} {CO}_{3} (aq) + H_{2} {SO}_{4} (aq) \to ?$

Discussion

1099.	In an experiment, 16 g of oxygen gas is produced. The total number of molecules present in it is __________.
Answer» In an experiment, 16 g of oxygen gas is produced. The total number of molecules present in it is __________.

Discussion

1100.	Poly siloxane formula
Answer» Poly siloxane formula

Discussion

Explore topic-wise InterviewSolutions in .

We can show that iron is more reactive than copper :(1) by preparing copper sulphate solution and dipping the iron strip in it.(2) by dipping both the strips in water for some time.(3) by preparing iron sulphate solution and dipping copper strip in it.(4) by heating both iron and copper strip.

What mass of nitrogen, N2, will contain the same number of molecules as 1.8 g of water, H2O? (Atomic masses: N = 14 u; H = 1 u; O = 16 u)

12. Out of Cr+2 and Cr+3,which one is stable in aqueous solution?

Green vitriol is the common name of .

Calculate the number of Aluminium ions present in 0.051 gram of Aluminium oxide?

A burning candle shows both physical and chemical changes. Explain ?

if xyz=1 then show that {[1+x+y^-1]^-1}+{[1+y+z^-1]^-1}+{[1+z+x^-1]^-1}=1

How should antibonding be represented between 2 atomic orbitals?

Question 3What type of mixtures are separated by the technique of crystallisation?

The pungent odour gas in the previous reaction is ___.

Question 42 A silver ornament of mass ‘m’ gram is polished with gold equivalent to 1% of the mass of silver. Compute the ration of the number of atoms of gold and silver in the ornament.

What is non uniform velocity

ntAn electron moving along a horizontal line with respect to observer and towards north. Due to Earth magnetic field it deflect towards east then position of the observern ntA)NHS 2)SHS 3)at equator 4) nonen

Which shell of an atom can accommodate a maximum of: (a) 8 electrons (b) 32 electrons?

What are the differences between fairly soluble and partially soluble in solubility?

What is the Empirical Formula for Sugar?

Who among these was the first to theorize the structure of atoms?

Explain mass energy.

One of the drawbacks of Rutherford's Atomic Model is that it failed to explain the ______ atoms.

How number of equvalents are related to Normailty and Volume

Standard electrode potentials of three metals X, Y and Z are –1.2 V, +0.5 V and –3.0 V respectively. The reducing power of these metals will be:

Among protium, deuterium and tritium which one has more bond energy

Which of the following relations can give hydrogen gas 1. Zinc +conc. H2SO4 2. C4 + dil. H2SO4 3. Mn + dil. HNO3 4. Pb+ dil. HNO3

Question 4 (b) Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?

find the number of electrons emitted per second by a 24W source of monochromatic light of wavelength 6600Ang, assuming 3% efficiency for photoelectric effec

due to which force is the first four members C1 to C4 are gases C5 to C17 are liquids and those containing 18 carbon atoms or more solids at 298 Kelvin .explain.

What is the nuclear charge of a carbon atom?

An atom of an element has 11 protons, 11 electrons and 12 neutrons. What is the the atomic mass?

why non metals dont react with acid

Define destructive distillation of coal. What are the byproducts formed on destructive distillation of coal?

29 The equivalent conductance of 22 Solution of aweak monobasic acid is 8.0 mhos cm2 and atinfinite dilution is 400 mhos cm2. The dissociationconstant of this acid is \lbrack AIPMT (Prelims)-20091(2) 6.25 x 104(1) 1.25 x 10-6(4) 1.25 x 10-5(3) 1.25 x 10-4

What are (i) Ionic compounds, and (ii) Molecular compounds? Give two examples of each type of compounds.

Soaps are sodium or potassium salts of long chain ___ .

Standard entropies of X2, Y2 and XY3 are 60, 40 and 50 JK-1 mol-1 respectively. For the reaction 1/2X2+3/2Y2→ XY3, △ H=-30KJto be at equilibrium, the temperature should be

What is a valence shell?

From the given metal nitrides how many will produce ammonia on hydrolysis?AlN,Mg3N2,Li3N,Ba3N2,Ca3N2

What is the oxidation number of the cetral metal in the complex K2[OsCl5N]?

Which among the given options is used to bleach cotton fabrics?

What is the minimum calorie intake for an urban person?

how to balance chemical equation c6h6+o2 arrow mark co2+h20but. i tried and in RHS why should we put 12 next to carbon instead of that we can put put 3 so that makes 6

The number of atoms in 1 mole is 6 ×1023. Then the number of sodium ions in 19.5 gram of Sodium chloride will be?

What will happen if there will be no electrons in an atom?

What produces more severe burns boiling water or steam)( answer in short)

The ratio of number of molecules in equal weights of H2, He and CH4 is

Explain the following :(a) Electrovalent compounds conduct electricity in molten or aqueous state.(b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points.(c) Atoms combine by transfer and sharing of electrons (s).

Identify the products of the given reaction.Na2CO3(aq)+H2SO4(aq)→?

In an experiment, 16 g of oxygen gas is produced. The total number of molecules present in it is __________.

Poly siloxane formula