10223 + Interview Questions in Chemistry Page 89 InterviewSolution

4401.	A large conducting sheet is having surface charge density σ. Electric field at a point close to it is (ε0 is permittivity of free space)[0.77 Mark]
Answer» A large conducting sheet is having surface charge density $σ$ . Electric field at a point close to it is ( $ε_{0}$ is permittivity of free space) $[$ 0.77 Mark $]$

Discussion

4402.	Which amongst the following is the least reactive metal ?
Answer» Which amongst the following is the least reactive metal ?

Discussion

4403.	What is the oxidation number of Mn in the product of the alkaline oxidative fusion of MnO2?
Answer» What is the oxidation number of Mn in the product of the alkaline oxidative fusion of $M n O_{2}$ ?

Discussion

4404.	Intermixing of particles of two different types of matter is called as
Answer» Intermixing of particles of two different types of matter is called as

Discussion

4405.	When do we call a chemical equation a balanced chemical equation?
Answer» When do we call a chemical equation a balanced chemical equation?

Discussion

4406.	If 1/6 mass of C-12 is taken as 1amu what will be the change in wgt of one mole?
Answer» If 1/6 mass of C-12 is taken as 1amu what will be the change in wgt of one mole?

Discussion

4407.	Write the cations and anions present, if any, in the following : (a) CH3COONa (b) NaCl (c) H2 (d) NH4NO3
Answer» Write the cations and anions present, if any, in the following : (a) $C H_{3} C O O N a$ (b) $N a C l$ (c) $H_{2}$ (d) $N H_{4} N O_{3}$

Discussion

4408.	Question 5 (b) Give the names of the elements present in the following compounds: (b) Hydrogen bromide
Answer» Question 5 (b) Give the names of the elements present in the following compounds: (b) Hydrogen bromide

Discussion

4409.	Ga (atomic mass = 70 u) crystallizes in a hexagonal close packed structure. The total number of voids in 0.581 g of Ga is ×1021. (Round off to the nearest integer). [Given: NA=6.023×1023]
Answer» $G a$ (atomic mass = $70 u$ ) crystallizes in a hexagonal close packed structure. The total number of voids in $0.581 g$ of $G a$ is $\times 10^{21}$ . (Round off to the nearest integer). [Given: $N_{A} = 6.023 \times 10^{23}]$

Discussion

4410.	What is the major source of fresh water in the city/town/village where you live?
Answer» What is the major source of fresh water in the city/town/village where you live?

Discussion

4411.	What is the (a) common unit of temperature, and (b) SI unit of temperature?
Answer» What is the (a) common unit of temperature, and (b) SI unit of temperature?

Discussion

4412.	(a) What is fractional distillation? What is the use of fractionating column in fractional distillation?(b) Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
Answer» (a) What is fractional distillation? What is the use of fractionating column in fractional distillation? (b) Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.

Discussion

4413.	Define Quantum chemistry.
Answer» Define Quantum chemistry.

Discussion

4414.	Give the names of the following compounds : (a) NaCIO (b) NaCIO2 (c) NaCIO3 (d) NaCIO4
Answer» Give the names of the following compounds : (a) $N a C I O$ (b) $N a C I O_{2}$ (c) $N a C I O_{3}$ (d) $N a C I O_{4}$

4414.

Give the names of the following compounds : (a) NaCIO (b) NaCIO2 (c) NaCIO3 (d) NaCIO4

Answer»

Give the names of the following compounds :

(a) $N a C I O$ (b) $N a C I O_{2}$

(c) $N a C I O_{3}$ (d) $N a C I O_{4}$

Discussion

4415.	Equation for Boyle's Law is
Answer» Equation for Boyle's Law is

Discussion

4416.	When electrons in an atom in an excited state fall to lower energy levels, energy is -
Answer» When electrons in an atom in an excited state fall to lower energy levels, energy is -

Discussion

4417.	Calculate the ratio of density of CO2 gas at 370 mm pressure at 0°C and O2 at 273 mm pressure at 0°C
Answer» Calculate the ratio of density of CO2 gas at 370 mm pressure at 0°C and O2 at 273 mm pressure at 0°C

Discussion

4418.	Isotopes of oxygen are given below. They have:
Answer» Isotopes of oxygen are given below. They have:

4418.

Isotopes of oxygen are given below. They have:

Answer»

Isotopes of oxygen are given below. They have:

Discussion

4419.	An ionic compound will be formed by the combination of one of the following pairs of elements. This pair of elements is chlorine and calcium
Answer» An ionic compound will be formed by the combination of one of the following pairs of elements. This pair of elements is chlorine and calcium

Discussion

4420.

Deducd from the datum provided. Datum To deduce 2311Na Neutron number 146C Mass number 3717Cl Proton number

Answer»

Deducd from the datum provided.

Datum	To deduce
$_{11}^{23} N a$	Neutron number
$_{6}^{14} C$	Mass number
$_{17}^{37} C l$	Proton number

Discussion

4421.	Calculate the lowering of vapour pressure for a 3 molal aqueous solution of urea.
Answer» Calculate the lowering of vapour pressure for a 3 molal aqueous solution of urea.

Discussion

4422.	The number of atoms present in 4.25 grams of NH3 is pproximately
Answer» The number of atoms present in $4.25 g r a m s$ of $N H_{3}$ is pproximately

Discussion

4423.	A hydrocarbon C10Hx requires 32.5 moles of O2, for combustion of 2.5 moles. Calculate valueof x
Answer» A hydrocarbon C10Hx requires 32.5 moles of O2, for combustion of 2.5 moles. Calculate valueof x

Discussion

4424.	AN ELEMENT M BURNS IN OXYGEN TO FORM AN IONIC COMPOUND MO WHAT WIPL HAPPEN IF THE ELEMENT IS MADE TO REACT SEPARATELY WITH SULPHUR AND CHLORIN
Answer» AN ELEMENT M BURNS IN OXYGEN TO FORM AN IONIC COMPOUND MO WHAT WIPL HAPPEN IF THE ELEMENT IS MADE TO REACT SEPARATELY WITH SULPHUR AND CHLORIN

Discussion

4425.	The boiling point of liquid argon is : (a) −196∘C (b) −183∘C (c) −186∘C (d) −193∘C
Answer» The boiling point of liquid argon is : $(a) - 196^{\circ} C (b) - 183^{\circ} C (c) - 186^{\circ} C (d) - 193^{\circ} C$

4425.

The boiling point of liquid argon is : (a) −196∘C (b) −183∘C (c) −186∘C (d) −193∘C

Answer»

The boiling point of liquid argon is :

$(a) - 196^{\circ} C (b) - 183^{\circ} C (c) - 186^{\circ} C (d) - 193^{\circ} C$

Discussion

4426.	a catalyst lowers the activation energy of a reaction from 20 kJ/mol to 10 kJ/mol ,the temperature at which uncatalysed reaction will ahve same rate as that of catalysd at 27^oC is ?
Answer» a catalyst lowers the activation energy of a reaction from 20 kJ/mol to 10 kJ/mol ,the temperature at which uncatalysed reaction will ahve same rate as that of catalysd at 27^oC is ?

Discussion

4427.	In the formula, 2n2 for finding the maximum number of electrons in an orbit, what does the letter 'n' represent?
Answer» In the formula, $2 n^{2}$ for finding the maximum number of electrons in an orbit, what does the letter 'n' represent?

Discussion

4428.	Which of the following is the most powerful oxidizing agent?
Answer» Which of the following is the most powerful oxidizing agent?

4428.

Which of the following is the most powerful oxidizing agent?

Answer»

Which of the following is the most powerful oxidizing agent?

Discussion

4429.	From the given options select the one with the highest pH value.
Answer» From the given options select the one with the highest pH value.

Discussion

4430.	46 If the weight of metal oxde is x g containing y gof oxygen, the equivalent weight of metal will be8x(1) E=У(2) E 8y-x)X(3) E=Y88(4) E Xy)y
Answer» 46 If the weight of metal oxde is x g containing y gof oxygen, the equivalent weight of metal will be8x(1) E=У(2) E 8y-x)X(3) E=Y88(4) E Xy)y

Discussion

4431.	flowing of electricity is chemical or physical change
Answer» flowing of electricity is chemical or physical change

Discussion

4432.	Which among the following is the weakest acid?
Answer» Which among the following is the weakest acid?

Discussion

4433.	find the density of a 3.6M sulphuric acid solution that is 29% h2so4 by mass. (M=98)
Answer» find the density of a 3.6M sulphuric acid solution that is 29% h2so4 by mass. (M=98)

Discussion

4434.	What is meant by saying that the latent heat of vaporisation of water is 22.5×105J/Kg?
Answer» What is meant by saying that the latent heat of vaporisation of water is 22.5 $\times 10^{5}$ J/Kg?

Discussion

4435.	Arrange in increasing order: 1. Nylon 6,6 ; Buna-S, polythene 2. Nylon 6 , neoprene, polyvinyl chloride.
Answer» Arrange in increasing order: 1. Nylon 6,6 ; Buna-S, polythene 2. Nylon 6 , neoprene, polyvinyl chloride.

Discussion

4436.	While filling the electron in a Carbon atom, which orbit will be occupied by the last electron getting filled?
Answer» While filling the electron in a Carbon atom, which orbit will be occupied by the last electron getting filled?

Discussion

4437.	what is the pressure and temperature at NTP and STP?
Answer» what is the pressure and temperature at NTP and STP?

Discussion

4438.	The correct statement(s) for orthoboric acid is(are)
Answer» The correct statement(s) for orthoboric acid is(are)

Discussion

4439.	If atomic mass of sodium is 23 a.m.u., then the mass of 3.01 x 1023 sodium atoms is:
Answer» If atomic mass of sodium is 23 a.m.u., then the mass of 3.01 x 10²³ sodium atoms is:

Discussion

4440.	If a solution follows henrys law ten is it necessary that the solute will dissole readily in that solvent (100% dissociation,if ionic salt) ?
Answer» If a solution follows henrys law ten is it necessary that the solute will dissole readily in that solvent (100% dissociation,if ionic salt) ?

Discussion

4441.	Question 47Write the formulae for the following and calculate the molecular mass for each one of them(a) Caustic potash(b) Baking powder(c) Lime Stone(d) Caustic soda(e) Ethanol(f) Common salt
Answer» Question 47 Write the formulae for the following and calculate the molecular mass for each one of them (a) Caustic potash (b) Baking powder (c) Lime Stone (d) Caustic soda (e) Ethanol (f) Common salt

4441.

Question 47Write the formulae for the following and calculate the molecular mass for each one of them(a) Caustic potash(b) Baking powder(c) Lime Stone(d) Caustic soda(e) Ethanol(f) Common salt

Answer»

Question 47

Write the formulae for the following and calculate the molecular mass for each one of them

(a) Caustic potash

(b) Baking powder

(c) Lime Stone

(d) Caustic soda

(e) Ethanol

(f) Common salt

Discussion

4442.	In the Rutherford's atomic model, which of the following particles were used?
Answer» In the Rutherford's atomic model, which of the following particles were used?

Discussion

4443.	Which amongst the following anions does not give effervescence with dilute sulphuric acid?
Answer» Which amongst the following anions does not give effervescence with dilute sulphuric acid?

Discussion

4444.	a polymer consist of 8atoms of sulphur per molecule which is 2percent by mass ,the molar mass of the polymer i
Answer» a polymer consist of 8atoms of sulphur per molecule which is 2percent by mass ,the molar mass of the polymer i

Discussion

4445.	An element Z has a valency of 3. What is the formula of oxide of Z?
Answer» An element Z has a valency of 3. What is the formula of oxide of Z?

Discussion

4446.	State the importance of the solubility of CO2 and O2 in water.
Answer» State the importance of the solubility of $C O_{2} a n d O_{2}$ in water.

Discussion

4447.	how does the solubility increase when we increase the temperature of a solution?
Answer» how does the solubility increase when we increase the temperature of a solution?

Discussion

4448.	The phase transition in which a liquid turns into a solid, when its temperature is lowered below its freezing point, is called as _________.
Answer» The phase transition in which a liquid turns into a solid, when its temperature is lowered below its freezing point, is called as _________.

Discussion

4449.	Molar mass of an element is equal to its ____________
Answer» Molar mass of an element is equal to its ____________

Discussion

4450.	114.Q. Nitrogen gas is filled in an insulated container. If x fraction of moles dissociates without exchange of any energy, then the fractional change in its temperature is 1) x / 5+x 2) x / 3+x 3) -3x / 2+x 4) 5x / 2+3x
Answer» 114.Q. Nitrogen gas is filled in an insulated container. If x fraction of moles dissociates without exchange of any energy, then the fractional change in its temperature is 1) x / 5+x 2) x / 3+x 3) -3x / 2+x 4) 5x / 2+3x

Discussion

Explore topic-wise InterviewSolutions in .

A large conducting sheet is having surface charge density σ. Electric field at a point close to it is (ε0 is permittivity of free space)[0.77 Mark]

Which amongst the following is the least reactive metal ?

What is the oxidation number of Mn in the product of the alkaline oxidative fusion of MnO2?

Intermixing of particles of two different types of matter is called as

When do we call a chemical equation a balanced chemical equation?

If 1/6 mass of C-12 is taken as 1amu what will be the change in wgt of one mole?

Write the cations and anions present, if any, in the following : (a) CH3COONa (b) NaCl (c) H2 (d) NH4NO3

Question 5 (b) Give the names of the elements present in the following compounds: (b) Hydrogen bromide

Ga (atomic mass = 70 u) crystallizes in a hexagonal close packed structure. The total number of voids in 0.581 g of Ga is ×1021. (Round off to the nearest integer). [Given: NA=6.023×1023]

What is the major source of fresh water in the city/town/village where you live?

What is the (a) common unit of temperature, and (b) SI unit of temperature?

(a) What is fractional distillation? What is the use of fractionating column in fractional distillation?​(b) Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.

Define Quantum chemistry.

Give the names of the following compounds : (a) NaCIO (b) NaCIO2 (c) NaCIO3 (d) NaCIO4

Equation for Boyle's Law is

When electrons in an atom in an excited state fall to lower energy levels, energy is -

Calculate the ratio of density of CO2 gas at 370 mm pressure at 0°C and O2 at 273 mm pressure at 0°C

Isotopes of oxygen are given below. They have:

An ionic compound will be formed by the combination of one of the following pairs of elements. This pair of elements is chlorine and calcium

Deducd from the datum provided. Datum To deduce 2311Na Neutron number 146C Mass number 3717Cl Proton number

Calculate the lowering of vapour pressure for a 3 molal aqueous solution of urea.

The number of atoms present in 4.25 grams of NH3 is pproximately

A hydrocarbon C10Hx requires 32.5 moles of O2, for combustion of 2.5 moles. Calculate valueof x

AN ELEMENT M BURNS IN OXYGEN TO FORM AN IONIC COMPOUND MO WHAT WIPL HAPPEN IF THE ELEMENT IS MADE TO REACT SEPARATELY WITH SULPHUR AND CHLORIN

The boiling point of liquid argon is : (a) −196∘C (b) −183∘C (c) −186∘C (d) −193∘C

a catalyst lowers the activation energy of a reaction from 20 kJ/mol to 10 kJ/mol ,the temperature at which uncatalysed reaction will ahve same rate as that of catalysd at 27^oC is ?

In the formula, 2n2 for finding the maximum number of electrons in an orbit, what does the letter 'n' represent?

Which of the following is the most powerful oxidizing agent?

From the given options select the one with the highest pH value.

46 If the weight of metal oxde is x g containing y gof oxygen, the equivalent weight of metal will be8x(1) E=У(2) E 8y-x)X(3) E=Y88(4) E Xy)y

flowing of electricity is chemical or physical change

Which among the following is the weakest acid?

find the density of a 3.6M sulphuric acid solution that is 29% h2so4 by mass. (M=98)

What is meant by saying that the latent heat of vaporisation of water is 22.5×105J/Kg?

Arrange in increasing order: 1. Nylon 6,6 ; Buna-S, polythene 2. Nylon 6 , neoprene, polyvinyl chloride.

While filling the electron in a Carbon atom, which orbit will be occupied by the last electron getting filled?

what is the pressure and temperature at NTP and STP?

The correct statement(s) for orthoboric acid is(are)

If atomic mass of sodium is 23 a.m.u., then the mass of 3.01 x 1023 sodium atoms is:

If a solution follows henrys law ten is it necessary that the solute will dissole readily in that solvent (100% dissociation,if ionic salt) ?

Question 47Write the formulae for the following and calculate the molecular mass for each one of them(a) Caustic potash(b) Baking powder(c) Lime Stone(d) Caustic soda(e) Ethanol(f) Common salt

In the Rutherford's atomic model, which of the following particles were used?

Which amongst the following anions does not give effervescence with dilute sulphuric acid?

a polymer consist of 8atoms of sulphur per molecule which is 2percent by mass ,the molar mass of the polymer i

An element Z has a valency of 3. What is the formula of oxide of Z?

State the importance of the solubility of CO2 and O2 in water.

how does the solubility increase when we increase the temperature of a solution?

The phase transition in which a liquid turns into a solid, when its temperature is lowered below its freezing point, is called as _________.

Molar mass of an element is equal to its ____________

114.Q. Nitrogen gas is filled in an insulated container. If x fraction of moles dissociates without exchange of any energy, then the fractional change in its temperature is 1) x / 5+x 2) x / 3+x 3) -3x / 2+x 4) 5x / 2+3x

(a) What is fractional distillation? What is the use of fractionating column in fractional distillation?(b) Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.