10223 + Interview Questions in Chemistry Page 98 InterviewSolution

4851.	Is mass of 1 mole of water 18 grams or 1 molecule of water weighs 18 gra
Answer» Is mass of 1 mole of water 18 grams or 1 molecule of water weighs 18 gra

Discussion

4852.	33.Which one of the following highest second ionization potential 1) N 2) C 3) O 4)F
Answer» 33.Which one of the following highest second ionization potential 1) N 2) C 3) O 4)F

Discussion

4853.	19. Why does the Mn (magnise) shows two different oxidation number?
Answer» 19. Why does the Mn (magnise) shows two different oxidation number?

Discussion

4854.	State the differences between compounds and mixtures with an example of each.
Answer» State the differences between compounds and mixtures with an example of each.

Discussion

4855.	we add dilute sulphuric acid or dilute hydrochloric acid , in reaction with zinc granuoles . why don't we add only sulphuric acid or hydrochloric acid , instead of dilute sulphuric acid or dilute hydrochloric acid
Answer» we add dilute sulphuric acid or dilute hydrochloric acid , in reaction with zinc granuoles . why don't we add only sulphuric acid or hydrochloric acid , instead of dilute sulphuric acid or dilute hydrochloric acid

Discussion

4856.	(a) Define atomic mass unit. What is its symbol ? (b) Define atomic mass of an element. (c) What is meant by saying that 'the atomic mass of oxygen is 16' ?
Answer» (a) Define atomic mass unit. What is its symbol ? (b) Define atomic mass of an element. (c) What is meant by saying that 'the atomic mass of oxygen is 16' ?

4856.

(a) Define atomic mass unit. What is its symbol ? (b) Define atomic mass of an element. (c) What is meant by saying that 'the atomic mass of oxygen is 16' ?

Answer»

(a) Define atomic mass unit. What is its symbol ?

(b) Define atomic mass of an element.

(c) What is meant by saying that 'the atomic mass of oxygen is 16' ?

Discussion

4857.	Explain the formation of (i) sodium ion, and (ii) chloride ion, from their respective atoms giving the number of protons and number of protons and number of electrons in each one of them. What is the reason for positive charge on a sodium ion and a negative charge on a chloride ion?
Answer» Explain the formation of (i) sodium ion, and (ii) chloride ion, from their respective atoms giving the number of protons and number of protons and number of electrons in each one of them. What is the reason for positive charge on a sodium ion and a negative charge on a chloride ion?

Discussion

4858.	What is the similarly among all the triads of dobereiner ?
Answer» What is the similarly among all the triads of dobereiner ?

Discussion

4859.	Gas laws are obtained by:
Answer» Gas laws are obtained by:

Discussion

4860.	Question 15 Rutherford’s alpha-particle scattering experiment was responsible for the discovery of: (a) Atomic Nucleus (b) Electron (c) Proton (d) Neutron
Answer» Question 15 Rutherford’s alpha-particle scattering experiment was responsible for the discovery of: (a) Atomic Nucleus (b) Electron (c) Proton (d) Neutron

Discussion

4861.	What are the physical properties of diamond?
Answer» What are the physical properties of diamond?

Discussion

4862.	Atomic numbers of elements are given below. Which of them would have the least electronegativity?
Answer» Atomic numbers of elements are given below. Which of them would have the least electronegativity?

Discussion

4863.	The number of mole of nitrogen in one litre of air containing 10% nitrogen by volume under Standard conditions is??
Answer» The number of mole of nitrogen in one litre of air containing 10% nitrogen by volume under Standard conditions is??

Discussion

4864.	Imagine that the electron in a hydrogen atom is replaced by a muon (μ). The mass of muon particle is 207 times that of an electron and charge is equal to the charge of an electron. The ionization potential of this hydrogen atom will be:
Answer» Imagine that the electron in a hydrogen atom is replaced by a muon ( $μ$ ). The mass of muon particle is $207$ times that of an electron and charge is equal to the charge of an electron. The ionization potential of this hydrogen atom will be:

Discussion

4865.	Give the correct sequence for the developed models of atomic structure. Some names are:Thomson's model, Rutherford model, Neils Bohr model and Quantum mechanical model
Answer» Give the correct sequence for the developed models of atomic structure. Some names are: Thomson's model, Rutherford model, Neils Bohr model and Quantum mechanical model

Discussion

4866.	The ratio between kinetic energies of 16 g oxygen and 28 g of N2 respectively at 300 K will be
Answer» The ratio between kinetic energies of 16 g oxygen and 28 g of N2 respectively at 300 K will be

Discussion

4867.	An early, but in correct, model of the hydrogen atomproposed by J.J.Thomson, proposed that the atom canbe considered as a positive cloud of charge +euniformly distributed throughout the volume of asphere of radius R, with the electron (an equalmagnitude negatively charged particle) at the centre.Using Gauss law or otherwise, we can show that theelectron will be in equilibrium at the centre.Suppose the electron is not stationary at the centre,but oscillating about the centre with an amplitude lessthan R. The time period of its oscillatory motion will be
Answer» An early, but in correct, model of the hydrogen atomproposed by J.J.Thomson, proposed that the atom canbe considered as a positive cloud of charge +euniformly distributed throughout the volume of asphere of radius R, with the electron (an equalmagnitude negatively charged particle) at the centre.Using Gauss law or otherwise, we can show that theelectron will be in equilibrium at the centre.Suppose the electron is not stationary at the centre,but oscillating about the centre with an amplitude lessthan R. The time period of its oscillatory motion will be

Discussion

4868.	Arrange the following in order of their increasing heat conductivity :
Answer» Arrange the following in order of their increasing heat conductivity :

Discussion

4869.	For which reactions is the enthalpy of formation equal to the enthalpy of reaction
Answer» For which reactions is the enthalpy of formation equal to the enthalpy of reaction

Discussion

4870.	41 The metal which displaces hydrogen form a boiling caustic soda solution is 1. Mg 2. Zn 3. Fe 4. As
Answer» 41 The metal which displaces hydrogen form a boiling caustic soda solution is 1. Mg 2. Zn 3. Fe 4. As

Discussion

4871.	3. A x:1 Molar mix of He and CH4 contained in a vessel at 20 bar pressure due to a hole in the vessel the gas mix leaks out with if the composition of the mixture is effusing out initially in 8: 1 the value of x is
Answer» 3. A x:1 Molar mix of He and CH4 contained in a vessel at 20 bar pressure due to a hole in the vessel the gas mix leaks out with if the composition of the mixture is effusing out initially in 8: 1 the value of x is

Discussion

4872.	Atomic mass of chlorine is a fraction and not a whole number Chemistry
Answer» Atomic mass of chlorine is a fraction and not a whole number Chemistry

Discussion

4873.	Which of the following represents a correct chemical formula?
Answer» Which of the following represents a correct chemical formula?

Discussion

4874.	1. What are radicals? 2. Give two examples of trivalent metal ions.
Answer» 1. What are radicals? 2. Give two examples of trivalent metal ions.

4874.

1. What are radicals? 2. Give two examples of trivalent metal ions.

Answer»

1. What are radicals?

2. Give two examples of trivalent metal ions.

Discussion

4875.	When sugar is dissolved in water, there is no increase in the volume. Which characteristic of matter is illustrated by this observation?
Answer» When sugar is dissolved in water, there is no increase in the volume. Which characteristic of matter is illustrated by this observation?

Discussion

4876.	Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : (a) forms an anion (b) forms a cation (c) has four electrons in its valence shell ?
Answer» Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : (a) forms an anion (b) forms a cation (c) has four electrons in its valence shell ?

4876.

Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : (a) forms an anion (b) forms a cation (c) has four electrons in its valence shell ?

Answer»

Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one :

(a) forms an anion (b) forms a cation

(c) has four electrons in its valence shell ?

Discussion

4877.	35. when a metal is burnt its mass increase by 50% the equivalent mass of metal is
Answer» 35. when a metal is burnt its mass increase by 50% the equivalent mass of metal is

Discussion

4878.	If the pressure of a gas at S.T.P is doubled and the temperature is raised to 546 K. What is the final Volume of the gas?
Answer» If the pressure of a gas at S.T.P is doubled and the temperature is raised to 546 K. What is the final Volume of the gas?

Discussion

4879.	For the chemical reaction, NaOH + K ⇒ KOH + Na Choose the right option.
Answer» For the chemical reaction, $N a O H$ + $K$ $\Rightarrow$ $K O H$ + Na Choose the right option.

Discussion

4880.	Pick the odd one from the following elements.
Answer» Pick the odd one from the following elements.

Discussion

4881.	Which of the gas is evolved when zinc reacts with the nitric acid?
Answer» Which of the gas is evolved when zinc reacts with the nitric acid?

Discussion

4882.	Fill in the blanks with the appropriate term.(Temperature, volume, mass, density, humidity, acidic, weight, neutral, shape.)(a) The capacity of air to hold moisture depends upon the ........... of the air.(b) Water does not have a ........... but has definite ........... and ........... .(c) While freezing, the ........... of water is lowered.(d) ........... soil has pH 7.
Answer» Fill in the blanks with the appropriate term. (Temperature, volume, mass, density, humidity, acidic, weight, neutral, shape.) (a) The capacity of air to hold moisture depends upon the ........... of the air. (b) Water does not have a ........... but has definite ........... and ........... . (c) While freezing, the ........... of water is lowered. (d) ........... soil has pH 7.

Discussion

4883.	compare the eneregy of electron in first 3 orbits of Hydrogen atom
Answer» compare the eneregy of electron in first 3 orbits of Hydrogen atom

Discussion

4884.	calculate mass of no2 which contain same number of oxygen atom as present in 1.12L of SO2 at stp
Answer» calculate mass of no2 which contain same number of oxygen atom as present in 1.12L of SO2 at stp

Discussion

4885.	For a particular gas, plot of volume (V) versus temperature (T) at constant pressure is a straight line passing through the origin.The plots at different values of pressure are shown in the figure. Which of the following order of pressures is correct for this gas?
Answer» For a particular gas, plot of volume $(V)$ versus temperature $(T)$ at constant pressure is a straight line passing through the origin.The plots at different values of pressure are shown in the figure. Which of the following order of pressures is correct for this gas?

Discussion

4886.	Determin the number of electron present in 6.7g of NH3
Answer» Determin the number of electron present in 6.7g of NH3

Discussion

4887.	The formula of the compound is A2B5. The number of electrons in the outermost orbits of A and B respectively are (1) 6 & 3 (2) 5 & 6 (3) 5 & 2 (4) 2 & 3
Answer» The formula of the compound is A2B5. The number of electrons in the outermost orbits of A and B respectively are (1) 6 & 3 (2) 5 & 6 (3) 5 & 2 (4) 2 & 3

Discussion

4888.	Benzene reacts with chlorine molecules in presence of ultra-violet light to give a compound A which acts as an insectiside.Benzene on treatment with excess of chlorine in presence of anhydrous AlCl3 form a chlorinated molecule B along with HCl.The sum of total number of atoms present in each of the compound A and B is:
Answer» Benzene reacts with chlorine molecules in presence of ultra-violet light to give a compound $A$ which acts as an insectiside. Benzene on treatment with excess of chlorine in presence of anhydrous $A l C l_{3}$ form a chlorinated molecule $B$ along with $H C l$ . The sum of total number of atoms present in each of the compound $A$ and $B$ is:

Discussion

4889.	The maximum number of electrons that can be accomodated in the L shell is:
Answer» The maximum number of electrons that can be accomodated in the L shell is:

Discussion

4890.	Concentrated sulphuric acid on reaction with metal produces which of the following gas?
Answer» Concentrated sulphuric acid on reaction with metal produces which of the following gas?

Discussion

4891.	The size of particles of a matter can be best described as _________
Answer» The size of particles of a matter can be best described as _________

Discussion

4892.	which elements have positive electron gain enthalpy? Is electron gain enthalpy of phosphorus positive
Answer» which elements have positive electron gain enthalpy? Is electron gain enthalpy of phosphorus positive

Discussion

4893.	When 5 L of a gas mixture of methane and propape is perfectly combusted at 0 and 1 atm pressure, 16 L of oxygen at the same temperature and pressure is consumed. The amount of heat released from this combustion in kJ (H comb of CH4 of 890 kJ/mol and of C3H8 is 2220 kJ / mol)
Answer» When 5 L of a gas mixture of methane and propape is perfectly combusted at 0 and 1 atm pressure, 16 L of oxygen at the same temperature and pressure is consumed. The amount of heat released from this combustion in kJ (H comb of CH4 of 890 kJ/mol and of C3H8 is 2220 kJ / mol)

Discussion

4894.	3) Give equations for Enthalpy of formation and standard enthalpy of formation for Carbon dioxide
Answer» 3) Give equations for Enthalpy of formation and standard enthalpy of formation for Carbon dioxide

Discussion

4895.	Nature of the salt depends on the nature of the acids, and bases that are reacting during neutralisaton. Explain.
Answer» Nature of the salt depends on the nature of the acids, and bases that are reacting during neutralisaton. Explain.

Discussion

4896.	Question 2People use a variety of methods to wash clothes. Usually after adding the soap, they ‘beat’ the clothes on a stone, or beat it with a paddle, scrub with a brush or the mixture is agitated in a washing machine. Why is agitation necessary to get clean clothes?
Answer» Question 2 People use a variety of methods to wash clothes. Usually after adding the soap, they ‘beat’ the clothes on a stone, or beat it with a paddle, scrub with a brush or the mixture is agitated in a washing machine. Why is agitation necessary to get clean clothes?

Discussion

4897.	A carbonate which does not decomposes on heating
Answer» A carbonate which does not decomposes on heating

Discussion

4898.	A total charge of 5 micro coulomb is distributed uniformly on the surface of the thin walled hemispherical cup. If the electric field strength at the centre of the hemisphere is 9*10'8 n/c, then the radius of the cup is?
Answer» A total charge of 5 micro coulomb is distributed uniformly on the surface of the thin walled hemispherical cup. If the electric field strength at the centre of the hemisphere is 9*10'8 n/c, then the radius of the cup is?

Discussion

4899.	Which of the following processes is used for the preparation of oxygen?
Answer» Which of the following processes is used for the preparation of oxygen?

Discussion

4900.	Benzene and toluene can be separated by:
Answer» Benzene and toluene can be separated by:

Discussion

Explore topic-wise InterviewSolutions in .

Is mass of 1 mole of water 18 grams or 1 molecule of water weighs 18 gra

33.Which one of the following highest second ionization potential 1) N 2) C 3) O 4)F

19. Why does the Mn (magnise) shows two different oxidation number?

State the differences between compounds and mixtures with an example of each.

we add dilute sulphuric acid or dilute hydrochloric acid , in reaction with zinc granuoles . why don't we add only sulphuric acid or hydrochloric acid , instead of dilute sulphuric acid or dilute hydrochloric acid

(a) Define atomic mass unit. What is its symbol ? (b) Define atomic mass of an element. (c) What is meant by saying that 'the atomic mass of oxygen is 16' ?

Explain the formation of (i) sodium ion, and (ii) chloride ion, from their respective atoms giving the number of protons and number of protons and number of electrons in each one of them. What is the reason for positive charge on a sodium ion and a negative charge on a chloride ion?

What is the similarly among all the triads of dobereiner ?

Gas laws are obtained by:

Question 15 Rutherford’s alpha-particle scattering experiment was responsible for the discovery of: (a) Atomic Nucleus (b) Electron (c) Proton (d) Neutron

What are the physical properties of diamond?

Atomic numbers of elements are given below. Which of them would have the least electronegativity?

The number of mole of nitrogen in one litre of air containing 10% nitrogen by volume under Standard conditions is??

Imagine that the electron in a hydrogen atom is replaced by a muon (μ). The mass of muon particle is 207 times that of an electron and charge is equal to the charge of an electron. The ionization potential of this hydrogen atom will be:

Give the correct sequence for the developed models of atomic structure. Some names are:Thomson's model, Rutherford model, Neils Bohr model and Quantum mechanical model

The ratio between kinetic energies of 16 g oxygen and 28 g of N2 respectively at 300 K will be

Arrange the following in order of their increasing heat conductivity :

For which reactions is the enthalpy of formation equal to the enthalpy of reaction

41 The metal which displaces hydrogen form a boiling caustic soda solution is 1. Mg 2. Zn 3. Fe 4. As

3. A x:1 Molar mix of He and CH4 contained in a vessel at 20 bar pressure due to a hole in the vessel the gas mix leaks out with if the composition of the mixture is effusing out initially in 8: 1 the value of x is

Atomic mass of chlorine is a fraction and not a whole number Chemistry

Which of the following represents a correct chemical formula?

1. What are radicals? 2. Give two examples of trivalent metal ions.

When sugar is dissolved in water, there is no increase in the volume. Which characteristic of matter is illustrated by this observation?

Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : (a) forms an anion (b) forms a cation (c) has four electrons in its valence shell ?

35. when a metal is burnt its mass increase by 50% the equivalent mass of metal is

If the pressure of a gas at S.T.P is doubled and the temperature is raised to 546 K. What is the final Volume of the gas?

For the chemical reaction, NaOH + K ⇒ KOH + Na Choose the right option.

Pick the odd one from the following elements.

Which of the gas is evolved when zinc reacts with the nitric acid?

compare the eneregy of electron in first 3 orbits of Hydrogen atom

calculate mass of no2 which contain same number of oxygen atom as present in 1.12L of SO2 at stp

For a particular gas, plot of volume (V) versus temperature (T) at constant pressure is a straight line passing through the origin.The plots at different values of pressure are shown in the figure. Which of the following order of pressures is correct for this gas?

Determin the number of electron present in 6.7g of NH3

The formula of the compound is A2B5. The number of electrons in the outermost orbits of A and B respectively are (1) 6 & 3 (2) 5 & 6 (3) 5 & 2 (4) 2 & 3

The maximum number of electrons that can be accomodated in the L shell is:

Concentrated sulphuric acid on reaction with metal produces which of the following gas?

The size of particles of a matter can be best described as _________

which elements have positive electron gain enthalpy? Is electron gain enthalpy of phosphorus positive

When 5 L of a gas mixture of methane and propape is perfectly combusted at 0 and 1 atm pressure, 16 L of oxygen at the same temperature and pressure is consumed. The amount of heat released from this combustion in kJ (H comb of CH4 of 890 kJ/mol and of C3H8 is 2220 kJ / mol)

3) Give equations for Enthalpy of formation and standard enthalpy of formation for Carbon dioxide

Nature of the salt depends on the nature of the acids, and bases that are reacting during neutralisaton. Explain.

Question 2People use a variety of methods to wash clothes. Usually after adding the soap, they ‘beat’ the clothes on a stone, or beat it with a paddle, scrub with a brush or the mixture is agitated in a washing machine. Why is agitation necessary to get clean clothes?

A carbonate which does not decomposes on heating

A total charge of 5 micro coulomb is distributed uniformly on the surface of the thin walled hemispherical cup. If the electric field strength at the centre of the hemisphere is 9*10'8 n/c, then the radius of the cup is?

Which of the following processes is used for the preparation of oxygen?

Benzene and toluene can be separated by: