10223 + Interview Questions in Chemistry Page 39 InterviewSolution

1901.	33. The vapour pressure of two pure liquids A and B that forms an ideal solution are 300 and 800 torr respectively at temperature T. A mixture of the vapours of A and B (for which the mole fraction of A is 0.25) is slowly compressed at temperature T. The vapour pressure of this condensate on 100% condensation of vapoure is measured to be 'P'. What is the value of 684 - P?
Answer» 33. The vapour pressure of two pure liquids A and B that forms an ideal solution are 300 and 800 torr respectively at temperature T. A mixture of the vapours of A and B (for which the mole fraction of A is 0.25) is slowly compressed at temperature T. The vapour pressure of this condensate on 100% condensation of vapoure is measured to be 'P'. What is the value of 684 - P?

Discussion

1902.	What is the angular velocity of the hour hand of a clock with time period 12 hours?
Answer» What is the angular velocity of the hour hand of a clock with time period 12 hours?

Discussion

1903.	Question 41 Compute the difference in masses of one mole each of aluminium atoms and one mole of its ions. (Mass of an electron is 9.1×10−28g) which one is heavier?
Answer» Question 41 Compute the difference in masses of one mole each of aluminium atoms and one mole of its ions. (Mass of an electron is $9.1 \times 10^{- 28} g)$ which one is heavier?

Discussion

1904.	Who discovered the electron?
Answer» Who discovered the electron?

Discussion

1905.	How to calculate the average atomic mass in detail
Answer» How to calculate the average atomic mass in detail

Discussion

1906.	In slaking of lime Is there any change in temperature
Answer» In slaking of lime Is there any change in temperature

Discussion

1907.	The value of n, for Paschen series of hydrogen spectrum is (n, = orbit number in which electron falls)
Answer» The value of n, for Paschen series of hydrogen spectrum is (n, = orbit number in which electron falls)

Discussion

1908.	Differentiate between : (a) Solution and suspension (b) Suspension and colloid
Answer» Differentiate between : (a) Solution and suspension (b) Suspension and colloid

1908.

Differentiate between : (a) Solution and suspension (b) Suspension and colloid

Answer»

Differentiate between :

(a) Solution and suspension

(b) Suspension and colloid

Discussion

1909.	.Which of the following statements is incorrect?AIPMT (Mains)-20111(1) Aluminium reacts with excess NaOH to giveAl(OH)_3,(2) NaHCO_3, on heating gives Na_2CO_3 (3) Pure sodium metal dissolves in liquidammonia to give blue solution(4) NaOH reacts with glass to give sodium silicate explain reason for every statemen
Answer» .Which of the following statements is incorrect?AIPMT (Mains)-20111(1) Aluminium reacts with excess NaOH to giveAl(OH)_3,(2) NaHCO_3, on heating gives Na_2CO_3 (3) Pure sodium metal dissolves in liquidammonia to give blue solution(4) NaOH reacts with glass to give sodium silicate explain reason for every statemen

Discussion

1910.	What type of mixture air is?Why?Give resons for your answer.
Answer» What type of mixture air is?Why?Give resons for your answer.

Discussion

1911.	The enthalpy of hydrogenation of cyclohexene is ' - 119.5' kJ per mole. if resonance energy of benzene is '-150.4' kJ per mole, its enthalpy of hydrogenation would be a) - 508.8 kJ/mole b) - 208.1 kJ/mole c) - 269.9 kJ/ mole d) - 358.5 kJ/ mole
Answer» The enthalpy of hydrogenation of cyclohexene is ' - 119.5' kJ per mole. if resonance energy of benzene is '-150.4' kJ per mole, its enthalpy of hydrogenation would be a) - 508.8 kJ/mole b) - 208.1 kJ/mole c) - 269.9 kJ/ mole d) - 358.5 kJ/ mole

Discussion

1912.	Which of the following reacts is not shown by formic acid? Reaction with Ca(OH)2Reaction with I2 / Red PReaction with NaHCO3Reaction with C2H5OH
Answer» Which of the following reacts is not shown by formic acid? Reaction with Ca(OH)2 Reaction with I2 / Red P Reaction with NaHCO3 Reaction with C2H5OH

Discussion

1913.	In a sphalerite crystal F^{2-} ions from CCP while Zn^{2+ }ion tetr ahedral number of ZnS units per unit cell
Answer» In a sphalerite crystal F^{2-} ions from CCP while Zn^{2+ }ion tetr ahedral number of ZnS units per unit cell

Discussion

1914.	Why is is electro dispersion method included in dispersion methods in the methods of preparations of lyophobic solutions. As the particles are aggregating with each other or they are accumulating with each other to form colloidal particle so so it should not be included in aggregation methods?
Answer» Why is is electro dispersion method included in dispersion methods in the methods of preparations of lyophobic solutions. As the particles are aggregating with each other or they are accumulating with each other to form colloidal particle so so it should not be included in aggregation methods?

Discussion

1915.	An alloy contains Copper, Sulphur and lead in the ratio 2:3:1 and another contains Sulphur, lead and tin in the ratio 5:4:3. If equal weights of both alloys are melted together to form a third alloy, then what will be the weight of tin per kg in new alloy?(1) 1/6 Kg.(4) 1/3 Kg.(2) 1/5 Kg. (3) 1/9 Kg.(5) None of these
Answer» An alloy contains Copper, Sulphur and lead in the ratio 2:3:1 and another contains Sulphur, lead and tin in the ratio 5:4:3. If equal weights of both alloys are melted together to form a third alloy, then what will be the weight of tin per kg in new alloy?(1) 1/6 Kg.(4) 1/3 Kg.(2) 1/5 Kg. (3) 1/9 Kg.(5) None of these

Discussion

1916.	The elements in the Mendeleev’s periodic table were arranged in the increasing order of their atomic masses. But, the sequence was inverted so that two elements with similar properties could be grouped together. Identify those two elements.
Answer» The elements in the Mendeleev’s periodic table were arranged in the increasing order of their atomic masses. But, the sequence was inverted so that two elements with similar properties could be grouped together. Identify those two elements.

Discussion

1917.	Why washing machine is a application of centrifugation?
Answer» Why washing machine is a application of centrifugation?

Discussion

1918.	Which type of interparticle forces are broken in each of the following processes? i HCl(l) → HCl(g) ii Sublimation of dry ice iii Evaporation of water iv vaporization of ammonia
Answer» Which type of interparticle forces are broken in each of the following processes? i HCl(l) → HCl(g) ii Sublimation of dry ice iii Evaporation of water iv vaporization of ammonia

Discussion

1919.	A He^{2+} ion is in its First Excited State.Its Ionization energy is:- (a)48.36 eV (b)54.40 eV (c)13.60 eV (d)6.04 e
Answer» A He^{2+} ion is in its First Excited State.Its Ionization energy is:- (a)48.36 eV (b)54.40 eV (c)13.60 eV (d)6.04 e

Discussion

1920.	A student took four test-tubes I, II, III and IV containing aluminium sulphate, copper sulphate, ferrous sulphate and zinc sulphate solutions respectively. He placed iron strips in each one of them. After some time, he found a brown deposit formed in test-tube marked :(1) I(2) II(3) III(4) IV
Answer» A student took four test-tubes I, II, III and IV containing aluminium sulphate, copper sulphate, ferrous sulphate and zinc sulphate solutions respectively. He placed iron strips in each one of them. After some time, he found a brown deposit formed in test-tube marked : (1) I (2) II (3) III (4) IV

Discussion

1921.	1) A new system of units, unit of mass=10kg, legth=10m, time=1min in 1joule system ?2)Weak nuclearforce range?
Answer» 1) A new system of units, unit of mass=10kg, legth=10m, time=1min in 1joule system ? 2)Weak nuclearforce range?

Discussion

1922.	0.1 mole of C atom is equal to all of the following except
Answer» $0.1$ mole of C atom is equal to all of the following except

Discussion

1923.	66 Why can't the oxidation state of group 15 elements exceed upto +8 ?
Answer» 66 Why can't the oxidation state of group 15 elements exceed upto +8 ?

Discussion

1924.	molar mass of oxygen is
Answer» molar mass of oxygen is

Discussion

1925.	\|\|x\|-1\| smaller than or equal to 4
Answer» \|\|x\|-1\| smaller than or equal to 4

Discussion

1926.	How does the mariner express the fact that the ship was completely surrounded by icebergs?
Answer» How does the mariner express the fact that the ship was completely surrounded by icebergs?

Discussion

1927.	Which of the following is an amorphous allotropic form of carbon?
Answer» Which of the following is an amorphous allotropic form of carbon?

Discussion

1928.	What is CNG? What are its uses?
Answer» What is CNG? What are its uses?

Discussion

1929.	Question 1 (g) Classify the following as chemical or physical changes: g. Making a fruit salad with raw fruits
Answer» Question 1 (g) Classify the following as chemical or physical changes: g. Making a fruit salad with raw fruits

Discussion

1930.	What produces more severe burns boiling water or steam?
Answer» What produces more severe burns boiling water or steam?

Discussion

1931.	21. A hemi cylindrical gate of radius R and the length L is pivoted about its Axis (neglect atmospheric pressure) Find vertical thrust of liquid on gate?
Answer» 21. A hemi cylindrical gate of radius R and the length L is pivoted about its Axis (neglect atmospheric pressure) Find vertical thrust of liquid on gate?

Discussion

1932.	For an electron, with n = 3 has only one radial node. The orbital angular momentum of the electron will be:
Answer» For an electron, with n = 3 has only one radial node. The orbital angular momentum of the electron will be:

Discussion

1933.	While writing a chemical formula, ___ is written first followed by ___ with a suffix added to it.
Answer» While writing a chemical formula, ___ is written first followed by ___ with a suffix added to it.

Discussion

1934.	Name the anion and cation which constitute the molecule of magnesium oxide.
Answer» Name the anion and cation which constitute the molecule of magnesium oxide.

Discussion

1935.	31. How to find valency of central metal atom
Answer» 31. How to find valency of central metal atom

Discussion

1936.	how to find the oxidizing state
Answer» how to find the oxidizing state

Discussion

1937.	Why do gases exert pressure?
Answer» Why do gases exert pressure?

Discussion

1938.	Is it possible to see atoms these days? Explain your answer.
Answer» Is it possible to see atoms these days? Explain your answer.

Discussion

1939.	Can you dissolve more sugar in a saturated solution of sugar in water at a particular temperature?
Answer» Can you dissolve more sugar in a saturated solution of sugar in water at a particular temperature?

Discussion

1940.	How temperature effect solubility
Answer» How temperature effect solubility

Discussion

1941.	Describe the method of separating a mixture containing common salt, sand and ammonium chloride.
Answer» Describe the method of separating a mixture containing common salt, sand and ammonium chloride.

Discussion

1942.	Question 9Which of the following will show “Tyndall effect”?a. Salt solutionb. Milkc. Copper sulphate solutiond. 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

1943.	What is the chemical formula of Calamine?
Answer» What is the chemical formula of Calamine?

Discussion

1944.	The relative density of silver is 10.8. The density of silver is .
Answer» The relative density of silver is 10.8. The density of silver is .

Discussion

1945.	Which of the following does not contain natural dyes?
Answer» Which of the following does not contain natural dyes?

Discussion

1946.	What is the order of bond strength in s-s, p-p, s-p overlapping? (a) s-s>s-p>p-p(b) p-p>s-p>s-s(c) p-p>s-s>s-p(d) s-p>s-s>p-p
Answer» What is the order of bond strength in s-s, p-p, s-p overlapping? (a) s-s>s-p>p-p (b) p-p>s-p>s-s (c) p-p>s-s>s-p (d) s-p>s-s>p-p

Discussion

1947.	29. For hydrogen gas Cp-Cv=a and for oxygen gas Cp-Cv=b then the relation between a and b is (where Cp and CV are gram specific heats) a)a=16b b)b=16a c)a=b d)None of these
Answer» 29. For hydrogen gas Cp-Cv=a and for oxygen gas Cp-Cv=b then the relation between a and b is (where Cp and CV are gram specific heats) a)a=16b b)b=16a c)a=b d)None of these

Discussion

1948.	Calculate the molecular masses of H2,O2,CO2,NH3,CH3OH. [5 MARKS]
Answer» Calculate the molecular masses of $H_{2}, O_{2}, C O_{2}, N H_{3}, C H_{3} O H .$ [5 MARKS]

Discussion

1949.	In case of CH3COOH the oxidation number of carbon of carboxylic group is
Answer» In case of CH3COOH the oxidation number of carbon of carboxylic group is

Discussion

1950.	Why can't we cut through a stream of water with our fingers, when we can swim in water ?
Answer» Why can't we cut through a stream of water with our fingers, when we can swim in water ?

Discussion

Explore topic-wise InterviewSolutions in .

What is the angular velocity of the hour hand of a clock with time period 12 hours?

Question 41 Compute the difference in masses of one mole each of aluminium atoms and one mole of its ions. (Mass of an electron is 9.1×10−28g) which one is heavier?

Who discovered the electron?

How to calculate the average atomic mass in detail

In slaking of lime Is there any change in temperature

The value of n, for Paschen series of hydrogen spectrum is (n, = orbit number in which electron falls)

Differentiate between : (a) Solution and suspension (b) Suspension and colloid

What type of mixture air is?Why?Give resons for your answer.

The enthalpy of hydrogenation of cyclohexene is ' - 119.5' kJ per mole. if resonance energy of benzene is '-150.4' kJ per mole, its enthalpy of hydrogenation would be a) - 508.8 kJ/mole b) - 208.1 kJ/mole c) - 269.9 kJ/ mole d) - 358.5 kJ/ mole

Which of the following reacts is not shown by formic acid? Reaction with Ca(OH)2Reaction with I2 / Red PReaction with NaHCO3Reaction with C2H5OH

In a sphalerite crystal F^{2-} ions from CCP while Zn^{2+ }ion tetr ahedral number of ZnS units per unit cell

Why is is electro dispersion method included in dispersion methods in the methods of preparations of lyophobic solutions. As the particles are aggregating with each other or they are accumulating with each other to form colloidal particle so so it should not be included in aggregation methods?

The elements in the Mendeleev’s periodic table were arranged in the increasing order of their atomic masses. But, the sequence was inverted so that two elements with similar properties could be grouped together. Identify those two elements.

Why washing machine is a application of centrifugation?

Which type of interparticle forces are broken in each of the following processes? i HCl(l) → HCl(g) ii Sublimation of dry ice iii Evaporation of water iv vaporization of ammonia

A He^{2+} ion is in its First Excited State.Its Ionization energy is:- (a)48.36 eV (b)54.40 eV (c)13.60 eV (d)6.04 e

A student took four test-tubes I, II, III and IV containing aluminium sulphate, copper sulphate, ferrous sulphate and zinc sulphate solutions respectively. He placed iron strips in each one of them. After some time, he found a brown deposit formed in test-tube marked :(1) I(2) II(3) III(4) IV

1) A new system of units, unit of mass=10kg, legth=10m, time=1min in 1joule system ?2)Weak nuclearforce range?

0.1 mole of C atom is equal to all of the following except

66 Why can't the oxidation state of group 15 elements exceed upto +8 ?

molar mass of oxygen is

||x|-1| smaller than or equal to 4

How does the mariner express the fact that the ship was completely surrounded by icebergs?

Which of the following is an amorphous allotropic form of carbon?

What is CNG? What are its uses?

Question 1 (g) Classify the following as chemical or physical changes: g. Making a fruit salad with raw fruits

What produces more severe burns boiling water or steam?

21. A hemi cylindrical gate of radius R and the length L is pivoted about its Axis (neglect atmospheric pressure) Find vertical thrust of liquid on gate?

For an electron, with n = 3 has only one radial node. The orbital angular momentum of the electron will be:

While writing a chemical formula, ___ is written first followed by ___ with a suffix added to it.

Name the anion and cation which constitute the molecule of magnesium oxide.

31. How to find valency of central metal atom

how to find the oxidizing state

Why do gases exert pressure?

Is it possible to see atoms these days? Explain your answer.

Can you dissolve more sugar in a saturated solution of sugar in water at a particular temperature?

How temperature effect solubility

Describe the method of separating a mixture containing common salt, sand and ammonium chloride.

Question 9Which of the following will show “Tyndall effect”?a. Salt solutionb. Milkc. Copper sulphate solutiond. Starch solution

What is the chemical formula of Calamine?

The relative density of silver is 10.8. The density of silver is .

Which of the following does not contain natural dyes?

What is the order of bond strength in s-s, p-p, s-p overlapping? (a) s-s>s-p>p-p(b) p-p>s-p>s-s(c) p-p>s-s>s-p(d) s-p>s-s>p-p

29. For hydrogen gas Cp-Cv=a and for oxygen gas Cp-Cv=b then the relation between a and b is (where Cp and CV are gram specific heats) a)a=16b b)b=16a c)a=b d)None of these

Calculate the molecular masses of H2,O2,CO2,NH3,CH3OH. [5 MARKS]

In case of CH3COOH the oxidation number of carbon of carboxylic group is

Why can't we cut through a stream of water with our fingers, when we can swim in water ?

While writing a chemical formula, _ is written first followed by _ with a suffix added to it.