10223 + Interview Questions in Chemistry Page 56 InterviewSolution

2751.	What are tri acidic bases? Give one example?
Answer» What are tri acidic bases? Give one example?

Discussion

2752.	Explain why, when a bottel of perfume is opend in a room, we can smell it even from a considerable distance.
Answer» Explain why, when a bottel of perfume is opend in a room, we can smell it even from a considerable distance.

Discussion

2753.	Which of the following substance in combination with fog makes smog?
Answer» Which of the following substance in combination with fog makes smog?

Discussion

2754.	Explain double displacement reaction more briefly.
Answer» Explain double displacement reaction more briefly.

Discussion

2755.	96 How to differencate between Polar and NonPolar solution ?
Answer» 96 How to differencate between Polar and NonPolar solution ?

Discussion

2756.	Mass of Proton is ___ times the mass of an electron.1873
Answer» Mass of Proton is ___ times the mass of an electron. 1873

2756.

Mass of Proton is ___ times the mass of an electron.1873

Answer»

Mass of Proton is ___ times the mass of an electron.

1873

Discussion

2757.	Non-metals are usually poor conductors of heat and electricity. They are non-lustrous; non-sonorous; non-malleable and are coloured.(a) Name a lustrous non-metal.(b) Name a non-metal which exists as a liquid at room temperature.(c) The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.(d) Name a non-metal which is known to form the largest number of compounds.(e) Name a non-metal other than carbon which shows allotropy.(f) Name a non-metal which is required for combustion.
Answer» Non-metals are usually poor conductors of heat and electricity. They are non-lustrous; non-sonorous; non-malleable and are coloured. (a) Name a lustrous non-metal. (b) Name a non-metal which exists as a liquid at room temperature. (c) The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope. (d) Name a non-metal which is known to form the largest number of compounds. (e) Name a non-metal other than carbon which shows allotropy. (f) Name a non-metal which is required for combustion.

Discussion

2758.	at cons†an t volume,pressure and temperature are related as (To=STP temp.)
Answer» at cons†an t volume,pressure and temperature are related as (To=STP temp.)

Discussion

2759.	Ram was having a gold coin. He dropped it in the beaker containing sulphuric acid. What will happen?
Answer» Ram was having a gold coin. He dropped it in the beaker containing sulphuric acid. What will happen?

Discussion

2760.	___________ is the method of separation of components of a mixture containing two miscible liquids that boil without decomposition and have sufficient difference in their boiling points.
Answer» ___________ is the method of separation of components of a mixture containing two miscible liquids that boil without decomposition and have sufficient difference in their boiling points.

Discussion

2761.	Why are liquids and gases categorized as fluids?
Answer» Why are liquids and gases categorized as fluids?

Discussion

2762.	the total no. of valence electrons in 4.2g of N3- ion is?
Answer» the total no. of valence electrons in 4.2g of N3- ion is?

Discussion

2763.	Indicate whether the following statements are True or False. Also, write the false statements in their correct form.(a) Air is necessary for combustion.(b) Magnesium is a non-combustible metal.(c) Carbon dioxide is an excellent fire extinguisher.(d) Calorific value of wood is higher than that of coal.
Answer» Indicate whether the following statements are True or False. Also, write the false statements in their correct form. (a) Air is necessary for combustion. (b) Magnesium is a non-combustible metal. (c) Carbon dioxide is an excellent fire extinguisher. (d) Calorific value of wood is higher than that of coal.

Discussion

2764.	32. Calculate the minimum Molar Mass of an Enzyme found in shark containing 20% selenium by mass. (Atomic mass of Se = 80)
Answer» 32. Calculate the minimum Molar Mass of an Enzyme found in shark containing 20% selenium by mass. (Atomic mass of Se = 80)

Discussion

2765.	What are the characteristics exhibited by a pure substance?
Answer» What are the characteristics exhibited by a pure substance?

Discussion

2766.	Which among the given options is not a physical property of HCl gas?
Answer» Which among the given options is not a physical property of HCl gas?

Discussion

2767.	what is this? 1. boyle's law 2.charle's law 3.gay-lussac's law 4.avogadro's law 5.ideal behaviour of gas 6. kinetic theory of gasses 7.kinetic equations of gases. what is gay lussac gaseous law is not vaid for solid or liquid?
Answer» what is this? 1. boyle's law 2.charle's law 3.gay-lussac's law 4.avogadro's law 5.ideal behaviour of gas 6. kinetic theory of gasses 7.kinetic equations of gases. what is gay lussac gaseous law is not vaid for solid or liquid?

Discussion

2768.	If heat or some other gas is evolved(exothermic reaction), then it is denoted by an upward arrow in a chemical equation. In the same way, if heat is absorbed (endothermic reaction) by the reactants, then by which symbol is this denoted?
Answer» If heat or some other gas is evolved(exothermic reaction), then it is denoted by an upward arrow in a chemical equation. In the same way, if heat is absorbed (endothermic reaction) by the reactants, then by which symbol is this denoted?

Discussion

2769.	Question 9 The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion? (a) 13 (b) 10 (c) 14 (d) 16
Answer» Question 9 The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion? (a) 13 (b) 10 (c) 14 (d) 16

Discussion

2770.	A compound is a (i)_______ substance made up of (ii) _______ .
Answer» A compound is a (i)_______ substance made up of (ii) _______ .

Discussion

2771.	What are the various methods to express concentration of a solution?
Answer» What are the various methods to express concentration of a solution?

Discussion

2772.	What is the relationship between gas pressure and temperature when volume is fixed? Give example of one device that works on that principle.
Answer» What is the relationship between gas pressure and temperature when volume is fixed? Give example of one device that works on that principle.

Discussion

2773.	3MnO2+4Al→3Mn+2+2Al2O3In this reaction, oxidising agent is:
Answer» $3 M n O_{2} + 4 A l \to 3 M n^{+ 2} + 2 A l_{2} O_{3}$ In this reaction, oxidising agent is:

Discussion

2774.	for an ideal binary liquid solution with P^° A>P^° B,which relation between XA(mole fraction of A in liquid phase)and YA(mole fraction of A in vapour phase) is correct?(i)YAXB (iii)YA/YB>XA/XB (iv)YA/YB
Answer» for an ideal binary liquid solution with P^° A>P^° B,which relation between XA(mole fraction of A in liquid phase)and YA(mole fraction of A in vapour phase) is correct?(i)YAXB (iii)YA/YB>XA/XB (iv)YA/YB

Discussion

2775.	Name two things that are matter and two that are not matter?
Answer» Name two things that are matter and two that are not matter?

Discussion

2776.	In the reactions HCl + NaOH → NaCl + H2O + x cal H2SO4 + 2NaOH → Na2SO4 + 2H2O + y cal
Answer» In the reactions HCl + NaOH → NaCl + H2O + x cal H2SO4 + 2NaOH → Na2SO4 + 2H2O + y cal

Discussion

2777.	60. A compound is made up of three elements A B and C with A atoms present at all the corners and the body Centre ,B atoms at all the face centres and C atoms at all edge centre positions. Determine formula of compound, if a)all the atoms remain intact .(b) if all the atoms along a horizontal plane are missing .(c)if all the atoms along diagonal plane are missing (d)if all the atoms along one of the body diagonals are missing (f)all the atoms along a face diagonal are missing.
Answer» 60. A compound is made up of three elements A B and C with A atoms present at all the corners and the body Centre ,B atoms at all the face centres and C atoms at all edge centre positions. Determine formula of compound, if a)all the atoms remain intact .(b) if all the atoms along a horizontal plane are missing .(c)if all the atoms along diagonal plane are missing (d)if all the atoms along one of the body diagonals are missing (f)all the atoms along a face diagonal are missing.

Discussion

2778.	Question 5 A few substances are arranged in the increasing order of ‘ forces of attraction’ between their particles. Which one of the following represents a correct arrangement? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice, air
Answer» Question 5 A few substances are arranged in the increasing order of ‘ forces of attraction’ between their particles. Which one of the following represents a correct arrangement? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice, air

Discussion

2779.	If the absolute temperature of a gas having volume Vcm3 is doubled and the pressure is reduced to half, the final volume will be
Answer» If the absolute temperature of a gas having volume $V c m^{3}$ is doubled and the pressure is reduced to half, the final volume will be

Discussion

2780.	what is the difference of chemical arrangement in mercury and lead that makes them poor conductors of heat ?
Answer» what is the difference of chemical arrangement in mercury and lead that makes them poor conductors of heat ?

Discussion

2781.	Brief difference between allyl and vinyl?
Answer» Brief difference between allyl and vinyl?

Discussion

2782.	Consider the elements Mg,Al,S,P and Si, the correct increasing order of their first ionization enthalpy is :
Answer» Consider the elements $M g, A l, S, P$ and $S i,$ the correct increasing order of their first ionization enthalpy is :

Discussion

2783.	When sulphur dioxide gas is passed through acidified potassium dichromate solution, the colour of the solution changes from :(1) orange to yellow (2) orange to green(3) green to orange(4) yellow to green
Answer» When sulphur dioxide gas is passed through acidified potassium dichromate solution, the colour of the solution changes from : (1) orange to yellow (2) orange to green (3) green to orange (4) yellow to green

Discussion

2784.	Write balanced equations for the following reactions:(a) reduction of copper oxide by hydrogen.(b) reduction of iron (III) oxide by carbon monoxide.(c) reduction of lead (II) oxide by carbon.
Answer» Write balanced equations for the following reactions: (a) reduction of copper oxide by hydrogen. (b) reduction of iron (III) oxide by carbon monoxide. (c) reduction of lead (II) oxide by carbon.

Discussion

2785.	The gas hydrogen and carbon dioxide are placed in two jars . if the lid separating the two jars be removed what will be the constitute in the jar after a few minutes
Answer» The gas hydrogen and carbon dioxide are placed in two jars . if the lid separating the two jars be removed what will be the constitute in the jar after a few minutes

Discussion

2786.	___ is the technique is used to separate salt crystals from the sea water.
Answer» ___ is the technique is used to separate salt crystals from the sea water.

Discussion

2787.	what is the reason behind law of definite proportion ?
Answer» what is the reason behind law of definite proportion ?

Discussion

2788.	How to calculate the value of ' b ' or excluded volume that is given as 4VNo in the Van Der Waal's equation for 1 mole. V = volume of a single molecule of a real gas No = Avogadro's number.
Answer» How to calculate the value of ' b ' or excluded volume that is given as 4VNo in the Van Der Waal's equation for 1 mole. V = volume of a single molecule of a real gas No = Avogadro's number.

Discussion

2789.	Why does diamond have the ability to conduct heat?
Answer» Why does diamond have the ability to conduct heat?

Discussion

2790.	When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
Answer» When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?

Discussion

2791.	The molarity of a solution having 8.4 volume strength of H2O2 is:
Answer» The molarity of a solution having 8.4 volume strength of $H_{2} O_{2}$ is:

Discussion

2792.	Consider the followingAquedus solution of compound A is used for(1)white washing.(ii Compound B gives a shiny finish to the walls.(ii) Compound C is used in black and whitephotographyCompounds C, A and B respectiyely are(1) AgCl, CaCO3 and Ca(OH)2(2) CaCO2, AgCl and Ca(OH)2(3) AgCl, CaO and CaCO3(4) CaO, CaCO3 and AgBr
Answer» Consider the followingAquedus solution of compound A is used for(1)white washing.(ii Compound B gives a shiny finish to the walls.(ii) Compound C is used in black and whitephotographyCompounds C, A and B respectiyely are(1) AgCl, CaCO3 and Ca(OH)2(2) CaCO2, AgCl and Ca(OH)2(3) AgCl, CaO and CaCO3(4) CaO, CaCO3 and AgBr

Discussion

2793.	A10.0 cm gas column is trapped by a column of Hg 4 cm long in capillary tube ofuniform bore. The tube is held horizontally in a room at 1 atm. Length of theair column when the tube is held vertically with the open end up is
Answer» A 10.0 cm gas column is trapped by a column of Hg 4 cm long in capillary tube of uniform bore. The tube is held horizontally in a room at 1 atm. Length of the air column when the tube is held vertically with the open end up is

Discussion

2794.	Arrange the Ce+3, La+3, Pm+3and Yb+3 in increasing order of their ionic radii:
Answer» Arrange the $C e^{+ 3}, L a^{+ 3}, P m^{+ 3} a n d Y b^{+ 3}$ in increasing order of their ionic radii:

Discussion

2795.	At a constant temperature a gas is initially at 2 atm pressure. To compress it to(18)th of its initial volume, pressure to be applied is ___
Answer» At a constant temperature a gas is initially at 2 atm pressure. To compress it to ${(\frac{1}{8})}^{t h}$ of its initial volume, pressure to be applied is ___

Discussion

2796.	what is meant by binary compounds?
Answer» what is meant by binary compounds?

Discussion

2797.	1) H2O2 + O3 → H2O +2O2 2)H2O2 +Ag2O →2Ag +H2O +O2 Determine whether H2O2 is oxidised or reduced in the above reaction? Explain.
Answer» 1) H2O2 + O3 → H2O +2O2 2)H2O2 +Ag2O →2Ag +H2O +O2 Determine whether H2O2 is oxidised or reduced in the above reaction? Explain.

Discussion

2798.	A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And S is a white solid which is used in making ordinary dry cells.(i) What could P, Q, R and S be?(ii) How would you separate a mixture containing P, Q, R and S?
Answer» A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And S is a white solid which is used in making ordinary dry cells. (i) What could P, Q, R and S be? (ii) How would you separate a mixture containing P, Q, R and S?

Discussion

2799.	The separation of which of the following ions is not possible by H2S in acidic medium?(1) Pb2+, Bi3+(2) Cd2+, Co2+(3) Cu2+, Ni2+(4) Cu2+, Zn2+
Answer» The separation of which of the following ions is not possible by H2S in acidic medium? (1) Pb2+, Bi3+ (2) Cd2+, Co2+ (3) Cu2+, Ni2+ (4) Cu2+, Zn2+

Discussion

2800.	On heating hydrated copper sulphate, it turns _________ colour.
Answer» On heating hydrated copper sulphate, it turns _________ colour.

Discussion

Explore topic-wise InterviewSolutions in .

What are tri acidic bases? Give one example?

Explain why, when a bottel of perfume is opend in a room, we can smell it even from a considerable distance.

Which of the following substance in combination with fog makes smog?

Explain double displacement reaction more briefly.

96 How to differencate between Polar and NonPolar solution ?

Mass of Proton is ___ times the mass of an electron.1873

at cons†an t volume,pressure and temperature are related as (To=STP temp.)

Ram was having a gold coin. He dropped it in the beaker containing sulphuric acid. What will happen?

___________ is the method of separation of components of a mixture containing two miscible liquids that boil without decomposition and have sufficient difference in their boiling points.

Why are liquids and gases categorized as fluids?

the total no. of valence electrons in 4.2g of N3- ion is?

32. Calculate the minimum Molar Mass of an Enzyme found in shark containing 20% selenium by mass. (Atomic mass of Se = 80)

What are the characteristics exhibited by a pure substance?

Which among the given options is not a physical property of HCl gas?

what is this? 1. boyle's law 2.charle's law 3.gay-lussac's law 4.avogadro's law 5.ideal behaviour of gas 6. kinetic theory of gasses 7.kinetic equations of gases. what is gay lussac gaseous law is not vaid for solid or liquid?

If heat or some other gas is evolved(exothermic reaction), then it is denoted by an upward arrow in a chemical equation. In the same way, if heat is absorbed (endothermic reaction) by the reactants, then by which symbol is this denoted?

Question 9 The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion? (a) 13 (b) 10 (c) 14 (d) 16

A compound is a (i)_______ substance made up of (ii) _______ .

What are the various methods to express concentration of a solution?

What is the relationship between gas pressure and temperature when volume is fixed? Give example of one device that works on that principle.

3MnO2+4Al→3Mn+2+2Al2O3In this reaction, oxidising agent is:

for an ideal binary liquid solution with P^° A>P^° B,which relation between XA(mole fraction of A in liquid phase)and YA(mole fraction of A in vapour phase) is correct?(i)YAXB (iii)YA/YB&gt;XA/XB (iv)YA/YB

Name two things that are matter and two that are not matter?

In the reactions HCl + NaOH → NaCl + H2O + x cal H2SO4 + 2NaOH → Na2SO4 + 2H2O + y cal

Question 5 A few substances are arranged in the increasing order of ‘ forces of attraction’ between their particles. Which one of the following represents a correct arrangement? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice, air

If the absolute temperature of a gas having volume Vcm3 is doubled and the pressure is reduced to half, the final volume will be

what is the difference of chemical arrangement in mercury and lead that makes them poor conductors of heat ?

Brief difference between allyl and vinyl?

Consider the elements Mg,Al,S,P and Si, the correct increasing order of their first ionization enthalpy is :

When sulphur dioxide gas is passed through acidified potassium dichromate solution, the colour of the solution changes from :(1) orange to yellow (2) orange to green(3) green to orange(4) yellow to green

Write balanced equations for the following reactions:(a) reduction of copper oxide by hydrogen.(b) reduction of iron (III) oxide by carbon monoxide.(c) reduction of lead (II) oxide by carbon.

The gas hydrogen and carbon dioxide are placed in two jars . if the lid separating the two jars be removed what will be the constitute in the jar after a few minutes

___ is the technique is used to separate salt crystals from the sea water.

what is the reason behind law of definite proportion ?

How to calculate the value of ' b ' or excluded volume that is given as 4VNo in the Van Der Waal's equation for 1 mole. V = volume of a single molecule of a real gas No = Avogadro's number.

Why does diamond have the ability to conduct heat?

When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?

The molarity of a solution having 8.4 volume strength of H2O2 is:

A10.0 cm gas column is trapped by a column of Hg 4 cm long in capillary tube ofuniform bore. The tube is held horizontally in a room at 1 atm. Length of theair column when the tube is held vertically with the open end up is

Arrange the Ce+3, La+3, Pm+3and Yb+3 in increasing order of their ionic radii:

At a constant temperature a gas is initially at 2 atm pressure. To compress it to(18)th of its initial volume, pressure to be applied is ___

what is meant by binary compounds?

1) H2O2 + O3 → H2O +2O2 2)H2O2 +Ag2O →2Ag +H2O +O2 Determine whether H2O2 is oxidised or reduced in the above reaction? Explain.

The separation of which of the following ions is not possible by H2S in acidic medium?(1) Pb2+, Bi3+(2) Cd2+, Co2+(3) Cu2+, Ni2+(4) Cu2+, Zn2+

On heating hydrated copper sulphate, it turns _________ colour.

A compound is a (i)_ substance made up of (ii) _ .

for an ideal binary liquid solution with P^° A>P^° B,which relation between XA(mole fraction of A in liquid phase)and YA(mole fraction of A in vapour phase) is correct?(i)YAXB (iii)YA/YB>XA/XB (iv)YA/YB