10223 + Interview Questions in Chemistry Page 79 InterviewSolution

3901.	The hydrocarbon with the general formula CnH2n+2 is an -
Answer» The hydrocarbon with the general formula C_nH_2n+2 is an -

Discussion

3902.	Differentiate between graphite and diamond on the basis of their physical properties.
Answer» Differentiate between graphite and diamond on the basis of their physical properties.

Discussion

3903.	Question 14Why do wet clothes placed on a clothes line dry after sometime? Explain.
Answer» Question 14 Why do wet clothes placed on a clothes line dry after sometime? Explain.

3903.

Question 14Why do wet clothes placed on a clothes line dry after sometime? Explain.

Answer»

Question 14

Why do wet clothes placed on a clothes line dry after sometime? Explain.

Discussion

3904.	48. Vapour pressure of one molal aqueous solution ofAgNO3 at the normal boiling point of water, assuming100% ionisation, is(1) 787.05 torr(2) 733.56 torr(3) 720.12 torr(4) 700 torr
Answer» 48. Vapour pressure of one molal aqueous solution ofAgNO3 at the normal boiling point of water, assuming100% ionisation, is(1) 787.05 torr(2) 733.56 torr(3) 720.12 torr(4) 700 torr

Discussion

3905.	A substance is said to be sonorous if it _________.
Answer» A substance is said to be sonorous if it _________.

Discussion

3906.	How to find atomic valency and atomic no.
Answer» How to find atomic valency and atomic no.

Discussion

3907.	Electrostatic force of attraction occurs between:
Answer» Electrostatic force of attraction occurs between:

Discussion

3908.	Select the option that will complete the homologous series given below.C2H4, C3H6, _______, C5H10, C6H12
Answer» Select the option that will complete the homologous series given below. $C_{2} H_{4}$ , $C_{3} H_{6}$ , _______, $C_{5} H_{10}$ , $C_{6} H_{12}$

Discussion

3909.	The chemical formula of sodium carbonate is:
Answer» The chemical formula of sodium carbonate is:

Discussion

3910.

The electronic configurations of four elements A, B, C and D are as follows: A 2, 8, 1 B 2, 8, 7 C 2, 8, 8 D 2, 4 (a) Which of these elements is a metal?(b) Which of these elements are non-metals?(c) Which two elements will combine to form an ionic bond?(d) Which two elements will combine to form a covalent bond?(e) Which element will form an anion of valency 1?(f) Which element is a noble gas?

Answer» The electronic configurations of four elements A, B, C and D are as follows:

A	2, 8, 1
B	2, 8, 7
C	2, 8, 8
D	2, 4

(a) Which of these elements is a metal?

(b) Which of these elements are non-metals?

(c) Which two elements will combine to form an ionic bond?

(d) Which two elements will combine to form a covalent bond?

(e) Which element will form an anion of valency 1?

(f) Which element is a noble gas?

Discussion

3911.	if 8 mole of PCl5 heated in a closded vessel of 10L capacity and 25% of it dissociates into PCl3 and Cl2 at equilibrium then value of Kp will be 1.P/30 2.P/15 3.2/3p 4.3/2P
Answer» if 8 mole of PCl5 heated in a closded vessel of 10L capacity and 25% of it dissociates into PCl3 and Cl2 at equilibrium then value of Kp will be 1.P/30 2.P/15 3.2/3p 4.3/2P

Discussion

3912.	How does thermodynamics help in deriving laws like law of mass action, distributive law? Also, what is distributive law in chemistry?
Answer» How does thermodynamics help in deriving laws like law of mass action, distributive law? Also, what is distributive law in chemistry?

Discussion

3913.	Maximum value of ( n +l+m) for unpairedelectrons in second excited state of chlorine 17Cl is
Answer» Maximum value of ( n +l+m) for unpaired electrons in second excited state of chlorine ₁₇Cl is

Discussion

3914.	atomic weight of chlorine 35.5 it has2 isotopes of atomic weight 35 and 37 ofheavier isotopes in the sample
Answer» atomic weight of chlorine 35.5 it has2 isotopes of atomic weight 35 and 37 ofheavier isotopes in the sample

Discussion

3915.	Plots showing the variation of the rate constant (k) with temperature (T) are given below. The plot that follows Arrhenius equation is:
Answer» Plots showing the variation of the rate constant (k) with temperature (T) are given below. The plot that follows Arrhenius equation is:

Discussion

3916.	Question 30A sample of vitamin C is known to contain 2.58×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?
Answer» Question 30 A sample of vitamin C is known to contain $2.58 \times 10^{24}$ oxygen atoms. How many moles of oxygen atoms are present in the sample?

Discussion

3917.	Property of the alkaline earth metals that increases with their atomic number is
Answer» Property of the alkaline earth metals that increases with their atomic number is

Discussion

3918.	Question 3 Why does dry HCl gas not change the colour of dry litmus paper?
Answer» Question 3 Why does dry HCl gas not change the colour of dry litmus paper?

Discussion

3919.	What kind of distillate do we observe once the distillation process is over?
Answer» What kind of distillate do we observe once the distillation process is over?

Discussion

3920.	Which substance falls in the area represented by question mark?
Answer» Which substance falls in the area represented by question mark?

3920.

Which substance falls in the area represented by question mark?

Answer»

Which substance falls in the area represented by question mark?

Discussion

3921.	What are the constituents of brass?
Answer» What are the constituents of brass?

Discussion

3922.	49.Which is most stable? a. Ti2+ b. V2+ c. Co2+ d. Sc2+
Answer» 49.Which is most stable? a. Ti2+ b. V2+ c. Co2+ d. Sc2+

Discussion

3923.	How is sand useful for extinguishing fires?
Answer» How is sand useful for extinguishing fires?

Discussion

3924.	A 1 MeV positron and a 1 MeV electron meet, each moving in opposite directions. They annihilate each other by emitting two photons. If the rest mass energy of an electron is 0.51 MeV, then the wavelength of each photon is
Answer» A $1 MeV$ positron and a $1 MeV$ electron meet, each moving in opposite directions. They annihilate each other by emitting two photons. If the rest mass energy of an electron is $0.51 MeV$ , then the wavelength of each photon is

Discussion

3925.	Suggest a method to liquefy atmosphere gases
Answer» Suggest a method to liquefy atmosphere gases

Discussion

3926.	Why full filled and half filled sub shell is most stable? And what is meaning of energy fluctuation and fluctuating stability of nuclear arrangement? I need brief explanation,and I will understand all things even it is of higher class. So, give the brief explanation.
Answer» Why full filled and half filled sub shell is most stable? And what is meaning of energy fluctuation and fluctuating stability of nuclear arrangement? I need brief explanation,and I will understand all things even it is of higher class. So, give the brief explanation.

Discussion

3927.	Name the temperature scale which does not have negative temperature readings.
Answer» Name the temperature scale which does not have negative temperature readings.

Discussion

3928.	Upto which element, the law of octaves was found to be applicable?
Answer» Upto which element, the law of octaves was found to be applicable?

Discussion

3929.	Formal charge ,Lewis structure for carbonate ion
Answer» Formal charge ,Lewis structure for carbonate ion

Discussion

3930.	33.In azimuthal quantum number l=2,w hat is the value of n ?
Answer» 33.In azimuthal quantum number l=2,w hat is the value of n ?

Discussion

3931.	What is the role of concentrated H2SO4 in the laboratory preparation of nitric acid?
Answer» What is the role of concentrated $H_{2} S O_{4}$ in the laboratory preparation of nitric acid?

Discussion

3932.	Name the three sub-atomic particles of an atom.
Answer» Name the three sub-atomic particles of an atom.

Discussion

3933.	In an atom, the total number of electrons having quantum numbers n=4,\|ml\|=1 and ms=−12 are___.
Answer» In an atom, the total number of electrons having quantum numbers $n = 4, \| m_{l} \| = 1$ and $m_{s} = \frac{- 1}{2}$ are___.

Discussion

3934.	Define specific latent heat of vaporization of a substance.
Answer» Define specific latent heat of vaporization of a substance.

Discussion

3935.	Choose the incorrect option:
Answer» Choose the incorrect option:

Discussion

3936.	Ionization energy of He^+ is 19.6×10^{-18} J atom^{-1} . The energy of the first stationary state (n=1) of Li^{2+} is:-(a) 8.82×10^{-17} J atom^{-1} (b)4.41×10^{-16 } J atom^{-1} (c)-4.41×10^{-17}J atom^{-1} (d) -2.2×10^{-15} J atom^{-1}
Answer» Ionization energy of He^+ is 19.6×10^{-18} J atom^{-1} . The energy of the first stationary state (n=1) of Li^{2+} is:-(a) 8.82×10^{-17} J atom^{-1} (b)4.41×10^{-16 } J atom^{-1} (c)-4.41×10^{-17}J atom^{-1} (d) -2.2×10^{-15} J atom^{-1}

Discussion

3937.	Maximum number of atoms are present in
Answer» Maximum number of atoms are present in

3937.

Maximum number of atoms are present in

Answer»

Maximum number of atoms are present in

Discussion

3938.	Which of the following energy is absorbed during the change of state of a substance? (a) specific heat (b) latent heat (c) heat capacity (d) heat of solution
Answer» Which of the following energy is absorbed during the change of state of a substance? (a) specific heat (b) latent heat (c) heat capacity (d) heat of solution

3938.

Which of the following energy is absorbed during the change of state of a substance? (a) specific heat (b) latent heat (c) heat capacity (d) heat of solution

Answer»

Which of the following energy is absorbed during the change of state of a substance?

(a) specific heat (b) latent heat (c) heat capacity (d) heat of solution

Discussion

3939.	Which type of mixture can be separated by the evaporation technique? State an example of such a mixture.
Answer» Which type of mixture can be separated by the evaporation technique? State an example of such a mixture.

Discussion

3940.	Why ink is not heated directly in activity to separate dye from ink?
Answer» Why ink is not heated directly in activity to separate dye from ink?

Discussion

3941.	Among the following which is the condition favourable for the formation of CH3OH from CO and H2 ?
Answer» Among the following which is the condition favourable for the formation of $C H_{3} O H$ from $C O$ and $H_{2}$ ?

Discussion

3942.	Equal masses of O2 and Ch4 have been taken in same container of volume v at 25°c the ratio of volume of gases diffuses out initially from vessel is.why can't we take only under root of molecular weight instead of moles
Answer» Equal masses of O2 and Ch4 have been taken in same container of volume v at 25°c the ratio of volume of gases diffuses out initially from vessel is.why can't we take only under root of molecular weight instead of moles

Discussion

3943.	As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionized Li atom (Z = 3) is
Answer» As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionized Li atom (Z = 3) is

Discussion

3944.	Slide to the correct value of x to balance the given equation.Fe2O3(s)+3H2(g)→2Fe(s)+xH2O(l)3
Answer» Slide to the correct value of x to balance the given equation. ${Fe}_{2} O_{3} (s) + 3 H_{2} (g) \to 2 Fe (s) + {xH}_{2} O (l)$ 3

Discussion

3945.	A a sugar solution with concentration 8.5% (w/w) is made by dissolving 'X' gram of sugar in 450 gram of water. The amount 'X' is.
Answer» A a sugar solution with concentration 8.5% (w/w) is made by dissolving 'X' gram of sugar in 450 gram of water. The amount 'X' is.

Discussion

3946.	Which of the following compounds does not exist? SF6 S2Cl2 SCl2 SeBr2
Answer» Which of the following compounds does not exist? SF6 S2Cl2 SCl2 SeBr2

Discussion

3947.	Décrivez votre instituteur/institutrice en utilisant les adjectifs.
Answer» Décrivez votre instituteur/institutrice en utilisant les adjectifs.

Discussion

3948.	Number of Fe atoms in 100 g Haemoglobin if it contains 0.33% Fe is [Atomic mass of Fe = 56]
Answer» Number of Fe atoms in 100 g Haemoglobin if it contains 0.33% Fe is [Atomic mass of Fe = 56]

Discussion

3949.	is iodine molecule a network solid or molecular solid?
Answer» is iodine molecule a network solid or molecular solid?

Discussion

3950.	What is the difference between colloids and suspensions ?
Answer» What is the difference between colloids and suspensions ?

Discussion

Explore topic-wise InterviewSolutions in .

The hydrocarbon with the general formula CnH2n+2 is an -

Differentiate between graphite and diamond on the basis of their physical properties.

Question 14Why do wet clothes placed on a clothes line dry after sometime? Explain.

48. Vapour pressure of one molal aqueous solution ofAgNO3 at the normal boiling point of water, assuming100% ionisation, is(1) 787.05 torr(2) 733.56 torr(3) 720.12 torr(4) 700 torr

A substance is said to be sonorous if it _________.

How to find atomic valency and atomic no.

Electrostatic force of attraction occurs between:

Select the option that will complete the homologous series given below.C2H4, C3H6, _______, C5H10, C6H12

The chemical formula of sodium carbonate is:

if 8 mole of PCl5 heated in a closded vessel of 10L capacity and 25% of it dissociates into PCl3 and Cl2 at equilibrium then value of Kp will be 1.P/30 2.P/15 3.2/3p 4.3/2P

How does thermodynamics help in deriving laws like law of mass action, distributive law? Also, what is distributive law in chemistry?

Maximum value of ( n +l+m) for unpairedelectrons in second excited state of chlorine 17Cl is

atomic weight of chlorine 35.5 it has2 isotopes of atomic weight 35 and 37 ofheavier isotopes in the sample

Plots showing the variation of the rate constant (k) with temperature (T) are given below. The plot that follows Arrhenius equation is:

Question 30A sample of vitamin C is known to contain 2.58×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?

Property of the alkaline earth metals that increases with their atomic number is

Question 3 Why does dry HCl gas not change the colour of dry litmus paper?

What kind of distillate do we observe once the distillation process is over?

Which substance falls in the area represented by question mark?

What are the constituents of brass?

49.Which is most stable? a. Ti2+ b. V2+ c. Co2+ d. Sc2+

How is sand useful for extinguishing fires?

A 1 MeV positron and a 1 MeV electron meet, each moving in opposite directions. They annihilate each other by emitting two photons. If the rest mass energy of an electron is 0.51 MeV, then the wavelength of each photon is

Suggest a method to liquefy atmosphere gases

Why full filled and half filled sub shell is most stable? And what is meaning of energy fluctuation and fluctuating stability of nuclear arrangement? I need brief explanation,and I will understand all things even it is of higher class. So, give the brief explanation.

Name the temperature scale which does not have negative temperature readings.

Upto which element, the law of octaves was found to be applicable?

Formal charge ,Lewis structure for carbonate ion

33.In azimuthal quantum number l=2,w hat is the value of n ?

What is the role of concentrated H2SO4 in the laboratory preparation of nitric acid?

Name the three sub-atomic particles of an atom.

In an atom, the total number of electrons having quantum numbers n=4,|ml|=1 and ms=−12 are___.

Define specific latent heat of vaporization of a substance.

Choose the incorrect option:

Ionization energy of He^+ is 19.6×10^{-18} J atom^{-1} . The energy of the first stationary state (n=1) of Li^{2+} is:-(a) 8.82×10^{-17} J atom^{-1} (b)4.41×10^{-16 } J atom^{-1} (c)-4.41×10^{-17}J atom^{-1} (d) -2.2×10^{-15} J atom^{-1}

Maximum number of atoms are present in

Which of the following energy is absorbed during the change of state of a substance? (a) specific heat (b) latent heat (c) heat capacity (d) heat of solution

Which type of mixture can be separated by the evaporation technique? State an example of such a mixture.

Why ink is not heated directly in activity to separate dye from ink?

Among the following which is the condition favourable for the formation of CH3OH from CO and H2 ?

Equal masses of O2 and Ch4 have been taken in same container of volume v at 25°c the ratio of volume of gases diffuses out initially from vessel is.why can't we take only under root of molecular weight instead of moles

As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionized Li atom (Z = 3) is

Slide to the correct value of x to balance the given equation.Fe2O3(s)+3H2(g)→2Fe(s)+xH2O(l)3

A a sugar solution with concentration 8.5% (w/w) is made by dissolving 'X' gram of sugar in 450 gram of water. The amount 'X' is.

Which of the following compounds does not exist? SF6 S2Cl2 SCl2 SeBr2

Décrivez votre instituteur/institutrice en utilisant les adjectifs.

Number of Fe atoms in 100 g Haemoglobin if it contains 0.33% Fe is [Atomic mass of Fe = 56]

is iodine molecule a network solid or molecular solid?

What is the difference between colloids and suspensions ?