10223 + Interview Questions in Chemistry Page 10 InterviewSolution

451.	3 hydro carbon a, b, c have melting point 183 degree Celsius -138 degree Celsius 95.3 degree Celsius. Respectively. Which one has minimum no. Of carbon atom molecules
Answer» 3 hydro carbon a, b, c have melting point 183 degree Celsius -138 degree Celsius 95.3 degree Celsius. Respectively. Which one has minimum no. Of carbon atom molecules

Discussion

452.	75. Chlorination of toluene gives a mixture of ortho and para chlorotoluene Why ? Explain.
Answer» 75. Chlorination of toluene gives a mixture of ortho and para chlorotoluene Why ? Explain.

Discussion

453.	Under similar conditions of pressure and temperature, 40 ml of slightly moist hydrogen chloride gas is mixed with 20 ml of ammonia gas,the final volume of gas at the same temperature and pressure will be
Answer» Under similar conditions of pressure and temperature, 40 ml of slightly moist hydrogen chloride gas is mixed with 20 ml of ammonia gas,the final volume of gas at the same temperature and pressure will be

Discussion

454.	27. What is solute and solvent in milk
Answer» 27. What is solute and solvent in milk

Discussion

455.	The following arrangement of elements represents which type of early classification?
Answer» The following arrangement of elements represents which type of early classification?

455.

The following arrangement of elements represents which type of early classification?

Answer»

The following arrangement of elements represents which type of early classification?

Discussion

456.	The absorption transition between the first and the fourth energy states of hydrogen atom are 3. The emission transitions between these states will be,
Answer» The absorption transition between the first and the fourth energy states of hydrogen atom are $3$ . The emission transitions between these states will be,

Discussion

457.	1.How to distinguish between n-factor and valency ?
Answer» 1.How to distinguish between n-factor and valency ?

Discussion

458.	Q 31.nitric oxide has at 2 atm and oxygen at 1 atm are injected simultaneously through pinhole of identical area of cross section at the opposite end of circular glass tube the length of tube is 1 m and gases are kept at same temperature determine the distance from o2 end at which first flash of shown fume would be observed A 0.11m B 0.33m C 0.85 m D 0.67m
Answer» Q 31.nitric oxide has at 2 atm and oxygen at 1 atm are injected simultaneously through pinhole of identical area of cross section at the opposite end of circular glass tube the length of tube is 1 m and gases are kept at same temperature determine the distance from o2 end at which first flash of shown fume would be observed A 0.11m B 0.33m C 0.85 m D 0.67m

Discussion

459.	The number of atoms in 52 a.m.u of He are?
Answer» The number of atoms in 52 a.m.u of He are?

Discussion

460.	4 mol of PCl5 are heated at cons†an t temperature in closed container.If degree of dissociation for PCl5 is 0.5 then calculate total number of moles at equibrilium
Answer» 4 mol of PCl5 are heated at cons†an t temperature in closed container.If degree of dissociation for PCl5 is 0.5 then calculate total number of moles at equibrilium

Discussion

461.	Sodium carbonate extract of the salt is acidified with dil.HNO3 and AgNO3 solution is added to it. A yellow yellow precipitate insoluble in excess NH4OH confirms the presence of :
Answer» Sodium carbonate extract of the salt is acidified with $d i l . H N O_{3}$ and $A g N O_{3}$ solution is added to it. A yellow yellow precipitate insoluble in excess $N H_{4} O H$ confirms the presence of :

Discussion

462.	How does a candle burn?write the steps of changes involved??
Answer» How does a candle burn?write the steps of changes involved??

Discussion

463.	Ratio of number of atoms in one mole of oxygen to ozone is _____
Answer» Ratio of number of atoms in one mole of oxygen to ozone is _____

Discussion

464.	Why was the law of octaves for the classification of elements discarded?
Answer» Why was the law of octaves for the classification of elements discarded?

Discussion

465.	Which of the following options are the main applications of the nitric acid?
Answer» Which of the following options are the main applications of the nitric acid?

Discussion

466.	What is variable compositions?
Answer» What is variable compositions?

Discussion

467.	Question 9 Which of the following will show “Tyndall effect”? a. Salt solution b. Milk c. Copper sulphate solution d. Starch solution
Answer» Question 9 Which of the following will show “Tyndall effect”? a. Salt solution b. Milk c. Copper sulphate solution d. Starch solution

Discussion

468.	Hydrogen has three isotopes written as: 11H, 21H, 31H Explain why: (i) these isotopes have almost identical chemical properties. (ii) they are electrically neutral.
Answer» Hydrogen has three isotopes written as: $_{1}^{1} H,_{1}^{2} H,_{1}^{3} H$ Explain why: (i) these isotopes have almost identical chemical properties. (ii) they are electrically neutral.

468.

Hydrogen has three isotopes written as: 11H, 21H, 31H Explain why: (i) these isotopes have almost identical chemical properties. (ii) they are electrically neutral.

Answer»

Hydrogen has three isotopes written as: $_{1}^{1} H,_{1}^{2} H,_{1}^{3} H$

Explain why:

(i) these isotopes have almost identical chemical properties.

(ii) they are electrically neutral.

Discussion

469.	Sodium salt of organic acid X produces effervescence with concentrated H2SO4 . X reacts with acidified aqueous CACL2 to give white ppt. which decolourises acidic solution of KMNO4 .X is --------?
Answer» Sodium salt of organic acid X produces effervescence with concentrated H2SO4 . X reacts with acidified aqueous CACL2 to give white ppt. which decolourises acidic solution of KMNO4 . X is --------?

Discussion

470.	48.Why does element of 4d have larger size than 3(
Answer» 48.Why does element of 4d have larger size than 3(

Discussion

471.	Is a decomposition(by heat, light, electricity) reaction a redox reaction?
Answer» Is a decomposition(by heat, light, electricity) reaction a redox reaction?

Discussion

472.	Mole fraction of solvent in aqueous solution of NaOH having molality equal to 4 is a-0.99 b- 0.75 c-0.93 d-0.05
Answer» Mole fraction of solvent in aqueous solution of NaOH having molality equal to 4 is a-0.99 b- 0.75 c-0.93 d-0.05

Discussion

473.	Explain briefly about cathode ray discharge tubes.
Answer» Explain briefly about cathode ray discharge tubes.

Discussion

474.	Is it necessary that percentage composition of elements of any compound on adding must be 100%
Answer» Is it necessary that percentage composition of elements of any compound on adding must be 100%

Discussion

475.	Give four differences between physical and chemical changes.
Answer» Give four differences between physical and chemical changes.

Discussion

476.	which is a strong reducing agent Cr2+ or Fe2+ and why?plese give an explanation on the basis of electronic configuration.
Answer» which is a strong reducing agent Cr2+ or Fe2+ and why?plese give an explanation on the basis of electronic configuration.

Discussion

477.	Why atoms cant exist independent? Why some atom can exist independently?
Answer» Why atoms cant exist independent? Why some atom can exist independently?

Discussion

478.	an ionic compound AB having similar structure to rock salt.all ions are removed along the planes of two body diagonal then formula of compound will be (1)A5B4(2)AB(3)A3B2(4)A2B3
Answer» an ionic compound AB having similar structure to rock salt.all ions are removed along the planes of two body diagonal then formula of compound will be (1)A5B4 (2)AB (3)A3B2 (4)A2B3

Discussion

479.	Which of the following pairs is isoelectronic in nature?
Answer» Which of the following pairs is isoelectronic in nature?

Discussion

480.	PH of pure water at 37 c is ( assume Kw = 2 10 ^ -14 ) ( log 2 = 0.30 ) (1) 6.55 (2) 7(3)7.25 (4) 6.85
Answer» PH of pure water at 37 c is ( assume Kw = 2 10 ^ -14 ) ( log 2 = 0.30 ) (1) 6.55 (2) 7 (3)7.25 (4) 6.85

Discussion

481.	Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.Nitrogen
Answer» Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere. Nitrogen

Discussion

482.	belongs to the sodium family of salts.
Answer» belongs to the sodium family of salts.

Discussion

483.	How much should the pressure be increased in order to decrease the volume of a gas by 15% at constant temperature?
Answer» How much should the pressure be increased in order to decrease the volume of a gas by 15% at constant temperature?

Discussion

484.	What is the name of the process due to which dry ice changes into carbon dioxide gas?
Answer» What is the name of the process due to which dry ice changes into carbon dioxide gas?

Discussion

485.	Why we take anode at the outer surface of tube? and why don't we take we take anode in the inner surface of tube of cathode ray experiment?
Answer» Why we take anode at the outer surface of tube? and why don't we take we take anode in the inner surface of tube of cathode ray experiment?

Discussion

486.	Question 3:Name the acid present in lemon juice and tomato.
Answer» Question 3: Name the acid present in lemon juice and tomato.

486.

Question 3:Name the acid present in lemon juice and tomato.

Answer»

Question 3:

Name the acid present in lemon juice and tomato.

Discussion

487.	Suppose you are given a chance to repeat the alpha-particlescattering experiment using a thin sheet of solid hydrogen in placeof the gold foil. (Hydrogen is a solid at temperatures below 14 K.)What results do you expect?
Answer» Suppose you are given a chance to repeat the alpha-particlescattering experiment using a thin sheet of solid hydrogen in placeof the gold foil. (Hydrogen is a solid at temperatures below 14 K.)What results do you expect?

Discussion

488.	Question 65 Two ores A and B were taken. On heating, ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals ?
Answer» Question 65 Two ores A and B were taken. On heating, ore A gives ${CO}_{2}$ whereas, ore B gives ${SO}_{2}$ . What steps will you take to convert them into metals ?

Discussion

489.	does the nature of an electrophile wi electronegative nature of an radioactive element affect the properties or electronegativity of another electrophile of higher electronegativity
Answer» does the nature of an electrophile wi electronegative nature of an radioactive element affect the properties or electronegativity of another electrophile of higher electronegativity

Discussion

490.

Match the pairs. Group 'A' Group 'B' a. Proton i.Negatively charged b.Electron 2.Neutral c.Neutron 3.Positively charged

Answer» Match the pairs.

Group 'A'	Group 'B'
a. Proton	i.Negatively charged
b.Electron	2.Neutral
c.Neutron	3.Positively charged

Discussion

491.	The formula for concentration of solution in terms of volume by volume percentage is:
Answer» The formula for concentration of solution in terms of volume by volume percentage is:

Discussion

492.	Statement 1: Metal oxides are also called basic oxides.Statement 2: Metal oxides neutralize the effect of acids and release water, similar to the reaction of a base with an acid.
Answer» Statement 1: Metal oxides are also called basic oxides. Statement 2: Metal oxides neutralize the effect of acids and release water, similar to the reaction of a base with an acid.

Discussion

493.	What is the nature of bonds present in oxygen molecule?
Answer» What is the nature of bonds present in oxygen molecule?

Discussion

494.	Why clothes get dry faster on a Sunny day than a hot humid day?
Answer» Why clothes get dry faster on a Sunny day than a hot humid day?

Discussion

495.	The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of polarizing power?
Answer» The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of polarizing power?

Discussion

496.	Write a note on the molecular structure of solids.
Answer» Write a note on the molecular structure of solids.

Discussion

497.	How many periods, series and groups are present in mendeleev periodic table?
Answer» How many periods, series and groups are present in mendeleev periodic table?

Discussion

498.	Electronic configuration of calcium atom can be written as
Answer» Electronic configuration of calcium atom can be written as

Discussion

499.	A proton, a deuteron and an α−particle with the same kinetic energy enters a region of uniform magnetic field moving at right angles to B. What is the ratio of the radii of their circular paths :
Answer» A proton, a deuteron and an $α - p a r t i c l e$ with the same kinetic energy enters a region of uniform magnetic field moving at right angles to $B$ . What is the ratio of the radii of their circular paths :

Discussion

500.	2.For the series of given compounds what is the order of decreasing solubility in water and why ?
Answer» 2.For the series of given compounds what is the order of decreasing solubility in water and why ?

Discussion

Explore topic-wise InterviewSolutions in .

3 hydro carbon a, b, c have melting point 183 degree Celsius -138 degree Celsius 95.3 degree Celsius. Respectively. Which one has minimum no. Of carbon atom molecules

75. Chlorination of toluene gives a mixture of ortho and para chlorotoluene Why ? Explain.

Under similar conditions of pressure and temperature, 40 ml of slightly moist hydrogen chloride gas is mixed with 20 ml of ammonia gas,the final volume of gas at the same temperature and pressure will be

27. What is solute and solvent in milk

The following arrangement of elements represents which type of early classification?

The absorption transition between the first and the fourth energy states of hydrogen atom are 3. The emission transitions between these states will be,

1.How to distinguish between n-factor and valency ?

The number of atoms in 52 a.m.u of He are?

4 mol of PCl5 are heated at cons†an t temperature in closed container.If degree of dissociation for PCl5 is 0.5 then calculate total number of moles at equibrilium

Sodium carbonate extract of the salt is acidified with dil.HNO3 and AgNO3 solution is added to it. A yellow yellow precipitate insoluble in excess NH4OH confirms the presence of :

How does a candle burn?write the steps of changes involved??

Ratio of number of atoms in one mole of oxygen to ozone is _____

Why was the law of octaves for the classification of elements discarded?

Which of the following options are the main applications of the nitric acid?

What is variable compositions?

Question 9 Which of the following will show “Tyndall effect”? a. Salt solution b. Milk c. Copper sulphate solution d. Starch solution

Hydrogen has three isotopes written as: 11H, 21H, 31H Explain why: (i) these isotopes have almost identical chemical properties. (ii) they are electrically neutral.

Sodium salt of organic acid X produces effervescence with concentrated H2SO4 . X reacts with acidified aqueous CACL2 to give white ppt. which decolourises acidic solution of KMNO4 .X is --------?

48.Why does element of 4d have larger size than 3(

Is a decomposition(by heat, light, electricity) reaction a redox reaction?

Mole fraction of solvent in aqueous solution of NaOH having molality equal to 4 is a-0.99 b- 0.75 c-0.93 d-0.05

Explain briefly about cathode ray discharge tubes.

Is it necessary that percentage composition of elements of any compound on adding must be 100%

Give four differences between physical and chemical changes.

which is a strong reducing agent Cr2+ or Fe2+ and why?plese give an explanation on the basis of electronic configuration.

Why atoms cant exist independent? Why some atom can exist independently?

an ionic compound AB having similar structure to rock salt.all ions are removed along the planes of two body diagonal then formula of compound will be (1)A5B4(2)AB(3)A3B2(4)A2B3

Which of the following pairs is isoelectronic in nature?

PH of pure water at 37 c is ( assume Kw = 2 10 ^ -14 ) ( log 2 = 0.30 ) (1) 6.55 (2) 7(3)7.25 (4) 6.85

Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.Nitrogen

belongs to the sodium family of salts.

How much should the pressure be increased in order to decrease the volume of a gas by 15% at constant temperature?

What is the name of the process due to which dry ice changes into carbon dioxide gas?

Why we take anode at the outer surface of tube? and why don't we take we take anode in the inner surface of tube of cathode ray experiment?

Question 3:Name the acid present in lemon juice and tomato.

Suppose you are given a chance to repeat the alpha-particlescattering experiment using a thin sheet of solid hydrogen in placeof the gold foil. (Hydrogen is a solid at temperatures below 14 K.)What results do you expect?

Question 65 Two ores A and B were taken. On heating, ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals ?

does the nature of an electrophile wi electronegative nature of an radioactive element affect the properties or electronegativity of another electrophile of higher electronegativity

Match the pairs. Group 'A' Group 'B' a. Proton i.Negatively charged b.Electron 2.Neutral c.Neutron 3.Positively charged

The formula for concentration of solution in terms of volume by volume percentage is:

Statement 1: Metal oxides are also called basic oxides.Statement 2: Metal oxides neutralize the effect of acids and release water, similar to the reaction of a base with an acid.

What is the nature of bonds present in oxygen molecule?

Why clothes get dry faster on a Sunny day than a hot humid day?

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of polarizing power?

Write a note on the molecular structure of solids.

How many periods, series and groups are present in mendeleev periodic table?

Electronic configuration of calcium atom can be written as

A proton, a deuteron and an α−particle with the same kinetic energy enters a region of uniform magnetic field moving at right angles to B. What is the ratio of the radii of their circular paths :

2.For the series of given compounds what is the order of decreasing solubility in water and why ?