10223 + Interview Questions in Chemistry Page 116 InterviewSolution

5751.

List -IList -II(i) Dilute solution of HCl(P) O2 evolved at anode(ii) Dilute slution of NaCl(Q)H2 evolved at cathode(iii) Concentrate solution of NaCl(R) Cl2 evolved at anode(iv) Fairly concentrate solution of AgNO3(S) Ag deposition at cathode Which of the following option has the correct combination considering List-I and List-II

Answer»

List -I	List -II
(i) Dilute solution of $H C l$	(P) $O_{2}$ evolved at anode
(ii) Dilute slution of $N a C l$	(Q) $H_{2}$ evolved at cathode
(iii) Concentrate solution of $N a C l$	(R) $C l_{2}$ evolved at anode
(iv) Fairly concentrate solution of $A g N O_{3}$	(S) $A g$ deposition at cathode

Which of the following option has the correct combination considering List-I and List-II

Discussion

5752.	If bromine atom is available in the form of two isotopes 7935Br (49.7 %) and 8135Br (50.3 %), calculate the average atomic mass of bromine atom.
Answer» If bromine atom is available in the form of two isotopes $_{35}^{79}$ Br (49.7 %) and $_{35}^{81}$ Br (50.3 %), calculate the average atomic mass of bromine atom.

Discussion

5753.	Which of the following trends regarding atomic radius is true?
Answer» Which of the following trends regarding atomic radius is true?

Discussion

5754.	68. A stationary atom of mass m emits a photon of wavelength lambda. The recoil speed of the atom is ?? In terms of planks constant,m and lambda ??
Answer» 68. A stationary atom of mass m emits a photon of wavelength lambda. The recoil speed of the atom is ?? In terms of planks constant,m and lambda ??

Discussion

5755.	Equal weights of methane and oxygen are mixed in an empty container at 25oC. The fraction of the total pressure exerted by oxygen is (IIT-JEE, 1981)
Answer» Equal weights of methane and oxygen are mixed in an empty container at $25^{o} C .$ The fraction of the total pressure exerted by oxygen is (IIT-JEE, 1981)

Discussion

5756.	Name any two solid substances whose mixture can be separated by sublimation.
Answer» Name any two solid substances whose mixture can be separated by sublimation.

Discussion

5757.	Differentiate between saturated, unsaturated, and supersaturated solutions.
Answer» Differentiate between saturated, unsaturated, and supersaturated solutions.

Discussion

5758.	The relation between volume V pressure P and absolute temperature T of an ideal gas is PV = xT where x is a constant. The value of x depends upon
Answer» The relation between volume $V$ pressure $P$ and absolute temperature $T$ of an ideal gas is $P V = x T$ where x is a constant. The value of x depends upon

Discussion

5759.	Which law states that the properties of the elements are a periodic function of their atomic masses?
Answer» Which law states that the properties of the elements are a periodic function of their atomic masses?

Discussion

5760.	Foils made of ____ was used in alpha-ray scattering experiment by Rutherford.
Answer» Foils made of ____ was used in alpha-ray scattering experiment by Rutherford.

Discussion

5761.	If q=nethen how can 'n' be negative as + and - do not hold any physical significance.Rather they represent opposite nature.
Answer» If q=ne then how can 'n' be negative as + and - do not hold any physical significance.Rather they represent opposite nature.

Discussion

5762.	What is the chemical formula of ammonium chloride?
Answer» What is the chemical formula of ammonium chloride?

Discussion

5763.	What is the chemical symbol of chromium?
Answer» What is the chemical symbol of chromium?

Discussion

5764.	If all the ions present at one of the rec†an gular plane in NaCl structure are removed what will be the new formula of rock salt
Answer» If all the ions present at one of the rec†an gular plane in NaCl structure are removed what will be the new formula of rock salt

Discussion

5765.	Marble and chalk or two forms of calcium carbonate. Equal masses of marble lumps and powdered Chalk are added to dilute hydrochloric acid. The marble takes longer than the chalk to fully react. Why is this so? (a) marble is more reactive than chalk (b) marble is more soluble than Chalk (c) The Marble has the smaller surface area than chalk. (d) The marble is more basic than chalk.
Answer» Marble and chalk or two forms of calcium carbonate. Equal masses of marble lumps and powdered Chalk are added to dilute hydrochloric acid. The marble takes longer than the chalk to fully react. Why is this so? (a) marble is more reactive than chalk (b) marble is more soluble than Chalk (c) The Marble has the smaller surface area than chalk. (d) The marble is more basic than chalk.

5765.

Marble and chalk or two forms of calcium carbonate. Equal masses of marble lumps and powdered Chalk are added to dilute hydrochloric acid. The marble takes longer than the chalk to fully react. Why is this so? (a) marble is more reactive than chalk (b) marble is more soluble than Chalk (c) The Marble has the smaller surface area than chalk. (d) The marble is more basic than chalk.

Answer»

Marble and chalk or two forms of calcium carbonate. Equal masses of marble lumps and powdered Chalk are added to dilute hydrochloric acid.

The marble takes longer than the chalk to fully react. Why is this so?

(a) marble is more reactive than chalk

(b) marble is more soluble than Chalk

(c) The Marble has the smaller surface area than chalk.

(d) The marble is more basic than chalk.

Discussion

5766.	Fill in the balnks. 34 gm of Ammonia is decomposed to _________ gm of Nitrogen and _____ gm of Hydrogen, _____ is the ratio of hydrogen to nitrogen by mass.
Answer» Fill in the balnks. 34 gm of Ammonia is decomposed to _________ gm of Nitrogen and _____ gm of Hydrogen, _____ is the ratio of hydrogen to nitrogen by mass.

Discussion

5767.

Chemical composition of some matter is given in the following table. Identify the main type of matter from their. Name of matter Chemical composition Main type of matter Sea water H2O + NaCl + MgCl2 Distilled water H2O Hydrogen gas filled in a ballon H2 The gas in LPG cylinder C4H10 + C3H8 Baking soda NaHCO3 Pure gold Au The gas in oxygen cylinder O2 Bronze Cu + Sn Diamond C Heated white powder of blue vitroi CuSO4 Lime stone CaCO3 Dilute hydrochloric acid HCL+ H2O

Answer» Chemical composition of some matter is given in the following table. Identify the main type of matter from their.

Name of matter	Chemical composition	Main type of matter
Sea water	$H_{2} O + N a C l + M g C l_{2}$
Distilled water	$H_{2} O$
Hydrogen gas filled in a ballon	$H_{2}$
The gas in LPG cylinder	$C_{4} H_{10} + C_{3} H_{8}$
Baking soda	$N a H C O_{3}$
Pure gold	$A u$
The gas in oxygen cylinder	O₂
Bronze	Cu + Sn
Diamond	C
Heated white powder of blue vitroi	CuSO₄
Lime stone	CaCO₃
Dilute hydrochloric acid	HCL+ H₂O

Discussion

5768.	How to remember atomic no and mass no of elements?
Answer» How to remember atomic no and mass no of elements?

Discussion

5769.	How many groups and periods are there in the Mendeleev's periodic table?
Answer» How many groups and periods are there in the Mendeleev's periodic table?

Discussion

5770.	Carbon dioxide was taken in an enclosed cylinder and compressed by applying pressurea) Which state of matter will be obtained after completion of the processb) Name and define the processc) Is the common name of the product obtained
Answer» Carbon dioxide was taken in an enclosed cylinder and compressed by applying pressure a) Which state of matter will be obtained after completion of the process b) Name and define the process c) Is the common name of the product obtained

5770.

Carbon dioxide was taken in an enclosed cylinder and compressed by applying pressurea) Which state of matter will be obtained after completion of the processb) Name and define the processc) Is the common name of the product obtained

Answer»

Carbon dioxide was taken in an enclosed cylinder and compressed by applying pressure

a) Which state of matter will be obtained after completion of the process

b) Name and define the process

c) Is the common name of the product obtained

Discussion

5771.	Consider the following statementsThe correct option regarding an isotope is
Answer» Consider the following statements The correct option regarding an isotope is

5771.

Consider the following statementsThe correct option regarding an isotope is

Answer»

Consider the following statements

The correct option regarding an isotope is

Discussion

5772.	What are strong and weak acids? In the following list, separate strong acids from weak acids, Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid.
Answer» What are strong and weak acids? In the following list, separate strong acids from weak acids, Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid.

Discussion

5773.	Question 5Explain why plastic containers are favoured for storing food.
Answer» Question 5 Explain why plastic containers are favoured for storing food.

Discussion

5774.	At the shop, Mr.Higson appeared
Answer» At the shop, Mr.Higson appeared

Discussion

5775.	Lemonadeis prepared by mixing lemon juice and sugar in water. You wish to addice to cool it. Should you add ice to the lemonade before or afterdissolving sugar? In which case would it be possible to dissolve moresugar?
Answer» Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving sugar? In which case would it be possible to dissolve more sugar?

Discussion

5776.	Plasma is a mixture of:
Answer» Plasma is a mixture of:

Discussion

5777.	8. 5 ml of 8N HNO3 ,4.8 ml of 5N HCL and a certain volume of 7M H2SO4 are mixed together and made up to 2liter. 30 ml of this acid mixture exactly neutralizes 42.9 ml of Na2Co3 solution containing 1 gram of Na2Co3.10H2O in 100 ml of water calculate the volume of sulfuric acid used for making the solution
Answer» 8. 5 ml of 8N HNO3 ,4.8 ml of 5N HCL and a certain volume of 7M H2SO4 are mixed together and made up to 2liter. 30 ml of this acid mixture exactly neutralizes 42.9 ml of Na2Co3 solution containing 1 gram of Na2Co3.10H2O in 100 ml of water calculate the volume of sulfuric acid used for making the solution

Discussion

5778.	In Pervoskite structure Ca atom occupies corner O atom occupies face centres and Ti occupies the mid of lines joining opposite face centres.Then in the given unit cell formula what is the oxidation state of Ti ??
Answer» In Pervoskite structure Ca atom occupies corner O atom occupies face centres and Ti occupies the mid of lines joining opposite face centres.Then in the given unit cell formula what is the oxidation state of Ti ??

Discussion

5779.	Which of the following will not produce H2 gas?
Answer» Which of the following will not produce $H_{2}$ gas?

Discussion

5780.	The general outer electronic configuration of transition elements is exhibited by:
Answer» The general outer electronic configuration of transition elements is exhibited by:

Discussion

5781.	State the reason for the following phenomenon:Blackboard dries up after wiping it.
Answer» State the reason for the following phenomenon: Blackboard dries up after wiping it.

Discussion

5782.	State whether colloidal solutions are homogeneous or heterogeneous.
Answer» State whether colloidal solutions are homogeneous or heterogeneous.

Discussion

5783.	For coagulation of 250 mL of Fe(OH)3 sol, 2 mL of 1 M Na2SO4 electrolyte is required. What is the coagulating value of Na2SO4 electrolyte?
Answer» For coagulation of $250 mL$ of $F e (O H)_{3}$ sol, $2 mL$ of $1 M N a_{2} S O_{4}$ electrolyte is required. What is the coagulating value of $N a_{2} S O_{4}$ electrolyte?

Discussion

5784.	Hydrogen is non-metal but why it is place in alkali metals
Answer» Hydrogen is non-metal but why it is place in alkali metals

Discussion

5785.	Which of these is the correct group reagent for Mn2+,Co2+,Zn2+& Ni2+ group cations?
Answer» Which of these is the correct group reagent for $M n^{2 +}, C o^{2 +}, Z n^{2 +} & N i^{2 +}$ group cations?

Discussion

5786.	Convert 574 K into celsius scale.
Answer» Convert 574 K into celsius scale.

Discussion

5787.	What is the primary valency of [Cr(en)3]Cl3?
Answer» What is the primary valency of $[C r (e n)_{3}] C l_{3}$ ?

Discussion

5788.	A solution contains x ml of ethyl alcohol mixed with 100ml of water. The concentration of the solution is 28.6% in terms of volume by volume percentage. Find x.
Answer» A solution contains x ml of ethyl alcohol mixed with 100ml of water. The concentration of the solution is $28.6 %$ in terms of volume by volume percentage. Find x.

Discussion

5789.	The state of matter in which inter-particle attraction is weak and inter-particle space is so large that the particles become completely free to move randomly in the entire available space is called as _______ .
Answer» The state of matter in which inter-particle attraction is weak and inter-particle space is so large that the particles become completely free to move randomly in the entire available space is called as _______ .

Discussion

5790.	Explain the balancing of redox reaction KMno4+H2So4+fe2so4→ K2so4 + Mnso4+Fe2(so4)3+H2o
Answer» Explain the balancing of redox reaction KMno4+H2So4+fe2so4→ K2so4 + Mnso4+Fe2(so4)3+H2o

Discussion

5791.	When the wavelength of radiation falling on a metal is changed from 500 nm to 200 nm the maximum kinetic energy of the photoelectrons becomes three times larger. The work function of the metal is close to-
Answer» When the wavelength of radiation falling on a metal is changed from $500 nm$ to $200 nm$ the maximum kinetic energy of the photoelectrons becomes three times larger. The work function of the metal is close to-

Discussion

5792.	State the origin and health impact of smog.
Answer» State the origin and health impact of smog.

Discussion

5793.	What is the difference between element and a substance? Is element a pure substance? Or, They both are same?
Answer» What is the difference between element and a substance? Is element a pure substance? Or, They both are same?

Discussion

5794.	Calculate the no. of gram atoms in a sample of lead weighing 100 grams.
Answer» Calculate the no. of gram atoms in a sample of lead weighing 100 grams.

Discussion

5795.	The Dobereiner's Triad given to you is Li, Na and K. If the atomic masses of Na and K in the Dobereiner's Triad is 23 and 39 respectively. Find the atomic mass of Lithium.
Answer» The Dobereiner's Triad given to you is Li, Na and K. If the atomic masses of Na and K in the Dobereiner's Triad is 23 and 39 respectively. Find the atomic mass of Lithium.

Discussion

5796.	79. Explain why Δ S(solution)>Δ S(solvent)-of fusion. And Δ S(solution)
Answer» 79. Explain why Δ S(solution)>Δ S(solvent)-of fusion. And Δ S(solution)

Discussion

5797.	95. A certain volume of H2 effuses from an apparatus in one minute. The same volume of ozonized oxygen (O3 + O, mix) took 246 s to effuse from the apparatus under identical conditions. Find the % composition of the ozonized oxygen. (a) 89.87 (c) 79.87 (b) 99.87 (d) 69.87
Answer» 95. A certain volume of H2 effuses from an apparatus in one minute. The same volume of ozonized oxygen (O3 + O, mix) took 246 s to effuse from the apparatus under identical conditions. Find the % composition of the ozonized oxygen. (a) 89.87 (c) 79.87 (b) 99.87 (d) 69.87

Discussion

5798.	Which of the following are correct axial distance and axial angles for a orthorhombic system?
Answer» Which of the following are correct axial distance and axial angles for a orthorhombic system?

Discussion

5799.	Which of the following is a redox reaction?
Answer» Which of the following is a redox reaction?

Discussion

5800.	Which one of the alkali metals, forms only, the normal oxide M2O on heating in air?
Answer» Which one of the alkali metals, forms only, the normal oxide $M_{2} O$ on heating in air?

Discussion

Explore topic-wise InterviewSolutions in .

If bromine atom is available in the form of two isotopes 7935Br (49.7 %) and 8135Br (50.3 %), calculate the average atomic mass of bromine atom.

Which of the following trends regarding atomic radius is true?

68. A stationary atom of mass m emits a photon of wavelength lambda. The recoil speed of the atom is ?? In terms of planks constant,m and lambda ??

Equal weights of methane and oxygen are mixed in an empty container at 25oC. The fraction of the total pressure exerted by oxygen is (IIT-JEE, 1981)

Name any two solid substances whose mixture can be separated by sublimation.

Differentiate between saturated, unsaturated, and supersaturated solutions.

The relation between volume V pressure P and absolute temperature T of an ideal gas is PV = xT where x is a constant. The value of x depends upon

Which law states that the properties of the elements are a periodic function of their atomic masses?

Foils made of ____ was used in alpha-ray scattering experiment by Rutherford.

If q=nethen how can 'n' be negative as + and - do not hold any physical significance.Rather they represent opposite nature.

What is the chemical formula of ammonium chloride?

What is the chemical symbol of chromium?

If all the ions present at one of the rec†an gular plane in NaCl structure are removed what will be the new formula of rock salt

Fill in the balnks. 34 gm of Ammonia is decomposed to _________ gm of Nitrogen and _____ gm of Hydrogen, _____ is the ratio of hydrogen to nitrogen by mass.

How to remember atomic no and mass no of elements?

How many groups and periods are there in the Mendeleev's periodic table?

Carbon dioxide was taken in an enclosed cylinder and compressed by applying pressurea) Which state of matter will be obtained after completion of the processb) Name and define the processc) Is the common name of the product obtained

Consider the following statementsThe correct option regarding an isotope is

What are strong and weak acids? In the following list, separate strong acids from weak acids, Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid.

Question 5Explain why plastic containers are favoured for storing food.

At the shop, Mr.Higson appeared

Lemonadeis prepared by mixing lemon juice and sugar in water. You wish to addice to cool it. Should you add ice to the lemonade before or afterdissolving sugar? In which case would it be possible to dissolve moresugar?

Plasma is a mixture of:

In Pervoskite structure Ca atom occupies corner O atom occupies face centres and Ti occupies the mid of lines joining opposite face centres.Then in the given unit cell formula what is the oxidation state of Ti ??

Which of the following will not produce H2 gas?

The general outer electronic configuration of transition elements is exhibited by:

State the reason for the following phenomenon:Blackboard dries up after wiping it.

State whether colloidal solutions are homogeneous or heterogeneous.

For coagulation of 250 mL of Fe(OH)3 sol, 2 mL of 1 M Na2SO4 electrolyte is required. What is the coagulating value of Na2SO4 electrolyte?

Hydrogen is non-metal but why it is place in alkali metals

Which of these is the correct group reagent for Mn2+,Co2+,Zn2+&amp; Ni2+ group cations?

Convert 574 K into celsius scale.

What is the primary valency of [Cr(en)3]Cl3?

A solution contains x ml of ethyl alcohol mixed with 100ml of water. The concentration of the solution is 28.6% in terms of volume by volume percentage. Find x.

The state of matter in which inter-particle attraction is weak and inter-particle space is so large that the particles become completely free to move randomly in the entire available space is called as _______ .

Explain the balancing of redox reaction KMno4+H2So4+fe2so4→ K2so4 + Mnso4+Fe2(so4)3+H2o

When the wavelength of radiation falling on a metal is changed from 500 nm to 200 nm the maximum kinetic energy of the photoelectrons becomes three times larger. The work function of the metal is close to-

State the origin and health impact of smog.

What is the difference between element and a substance? Is element a pure substance? Or, They both are same?

Calculate the no. of gram atoms in a sample of lead weighing 100 grams.

The Dobereiner's Triad given to you is Li, Na and K. If the atomic masses of Na and K in the Dobereiner's Triad is 23 and 39 respectively. Find the atomic mass of Lithium.

79. Explain why Δ S(solution)>Δ S(solvent)-of fusion. And Δ S(solution)

95. A certain volume of H2 effuses from an apparatus in one minute. The same volume of ozonized oxygen (O3 + O, mix) took 246 s to effuse from the apparatus under identical conditions. Find the % composition of the ozonized oxygen. (a) 89.87 (c) 79.87 (b) 99.87 (d) 69.87

Which of the following are correct axial distance and axial angles for a orthorhombic system?

Which of the following is a redox reaction?

Which one of the alkali metals, forms only, the normal oxide M2O on heating in air?

Fill in the balnks. 34 gm of Ammonia is decomposed to _______ gm of Nitrogen and _ gm of Hydrogen, ___ is the ratio of hydrogen to nitrogen by mass.

Which of these is the correct group reagent for Mn2+,Co2+,Zn2+& Ni2+ group cations?