10223 + Interview Questions in Chemistry Page 50 InterviewSolution

2451.	Air is less dense than exhaust from chimneys. Why or why not ?
Answer» Air is less dense than exhaust from chimneys. Why or why not ?

Discussion

2452.	Explain why plastic containers are favoured for storing food.
Answer» Explain why plastic containers are favoured for storing food.

Discussion

2453.	Do solutions and suspensions show brownian movement and if they do then place the three types of mixtures in ascending order as per their degree of brownian motion.
Answer» Do solutions and suspensions show brownian movement and if they do then place the three types of mixtures in ascending order as per their degree of brownian motion.

Discussion

2454.	Write postulates of Dalton’s atomic theory.
Answer» Write postulates of Dalton’s atomic theory.

Discussion

2455.	5 moles each of N2 and H2 gases are reacted in a vessel to form NH3. At equilibrium stage 30% of H2 gone converted into NH3. Calculate Kc for the reaction
Answer» 5 moles each of N2 and H2 gases are reacted in a vessel to form NH3. At equilibrium stage 30% of H2 gone converted into NH3. Calculate Kc for the reaction

Discussion

2456.	what is mechanical impregnation technique
Answer» what is mechanical impregnation technique

Discussion

2457.	What is the greenhouse effect? Which gas is responsible for this?
Answer» What is the greenhouse effect? Which gas is responsible for this?

Discussion

2458.	84. 5g of a piece of marble was treated with excess of dil. HCl . When reaction was complete 448ml of CO2 was obtained at STP. The percentage of CaCO3 in the marble is -
Answer» 84. 5g of a piece of marble was treated with excess of dil. HCl . When reaction was complete 448ml of CO2 was obtained at STP. The percentage of CaCO3 in the marble is -

Discussion

2459.	What is the maximum capacity of shell- K to hold electrons?
Answer» What is the maximum capacity of shell- K to hold electrons?

Discussion

2460.	Why is thermal stability of following compunds in the given order NaF
Answer» Why is thermal stability of following compunds in the given order NaF

Discussion

2461.	In an experiment the following reactions takes place:X + Y → Z2 g 4 g u gZ + A→ Bu g 7 g c gWhat is the value of u and c respectively?
Answer» In an experiment the following reactions takes place: $X + Y \to Z 2 g 4 g u g$ $Z + A \to B u g 7 g c g$ What is the value of u and c respectively?

Discussion

2462.	At constant temperature, a gas occupies 11.2 liters at 0.860 atm. What is the pressure if the volume becomes 15.0 L?0.64
Answer» At constant temperature, a gas occupies 11.2 liters at 0.860 atm. What is the pressure if the volume becomes 15.0 L? 0.64

Discussion

2463.	What type of magnel is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?
Answer» What type of magnel is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?

Discussion

2464.	List of compounds having +M and -M effect
Answer» List of compounds having +M and -M effect

Discussion

2465.	A closed container has air at 20°C. Some air at 50°C is inserted into the centre of the container. In which direction will this air move–upwards, downwards or not all?
Answer» A closed container has air at 20°C. Some air at 50°C is inserted into the centre of the container. In which direction will this air move–upwards, downwards or not all?

Discussion

2466.	49. What is the mole fraction of solute in 0.2 molal aqueous solution of urea? \lbrack(H2N)2CO 60\rbrack(1) 0.003(2) 0.02(3) 0.3(4) 0.03
Answer» 49. What is the mole fraction of solute in 0.2 molal aqueous solution of urea? \lbrack(H2N)2CO 60\rbrack(1) 0.003(2) 0.02(3) 0.3(4) 0.03

Discussion

2467.	Give the names and structural formula of the first three members of homologous series of alkene.
Answer» Give the names and structural formula of the first three members of homologous series of alkene.

Discussion

2468.	How will you separate iron pins from sand ?
Answer» How will you separate iron pins from sand ?

Discussion

2469.	Which of the following statement(s) is/are correct?to At 308 K, water exists as gaseous state(11) At 373 K. water only exists as gaseous state(i) At 283 K. water exists as liquid state( Only (iii)(2) Only (1)(3) Both (i) and (iii) (4) Both (ii) and (iii)
Answer» Which of the following statement(s) is/are correct? to At 308 K, water exists as gaseous state (11) At 373 K. water only exists as gaseous state (i) At 283 K. water exists as liquid state ( Only (iii) (2) Only (1) (3) Both (i) and (iii) (4) Both (ii) and (iii)

Discussion

2470.	1.0 g of radium is reduced by 2.0 mg in 5 years by α-decay . calculate the half life of radium
Answer» 1.0 g of radium is reduced by 2.0 mg in 5 years by α-decay . calculate the half life of radium

Discussion

2471.	Select the correct formula for the hydride ion.
Answer» Select the correct formula for the hydride ion.

Discussion

2472.	The correct order of thermal stability of alkali metal hydrides is:
Answer» The correct order of thermal stability of alkali metal hydrides is:

Discussion

2473.	94.The bond energy order W.R.T MOT of CO, N2 CN,ethyene 1.CO>N2>CN>ethyene 2.N2>CO>ethyene>CN
Answer» 94.The bond energy order W.R.T MOT of CO, N2 CN,ethyene 1.CO>N2>CN>ethyene 2.N2>CO>ethyene>CN

Discussion

2474.	List five activities that are possible due to the presence of air.
Answer» List five activities that are possible due to the presence of air.

Discussion

2475.	what name is given to reaction of ethanol with sodiu
Answer» what name is given to reaction of ethanol with sodiu

Discussion

2476.	Trace out the differences of elemental analysis done on living things and non-living things.
Answer» Trace out the differences of elemental analysis done on living things and non-living things.

Discussion

2477.	Question 4Write down the uses of Baking Soda.
Answer» Question 4 Write down the uses of Baking Soda.

2477.

Question 4Write down the uses of Baking Soda.

Answer»

Question 4

Write down the uses of Baking Soda.

Discussion

2478.	Question 36How is ethene prepared from ethanol?
Answer» Question 36 How is ethene prepared from ethanol?

Discussion

2479.	Density = ____
Answer» Density = ____

Discussion

2480.	We have kept a burning candle inside a closed glass chamber with oxygen inside it. After some time what do you think will be the change in the weight of the apparatus?
Answer» We have kept a burning candle inside a closed glass chamber with oxygen inside it. After some time what do you think will be the change in the weight of the apparatus?

2480.

We have kept a burning candle inside a closed glass chamber with oxygen inside it. After some time what do you think will be the change in the weight of the apparatus?

Answer»

We have kept a burning candle inside a closed glass chamber with oxygen inside it. After some time what do you think will be the change in the weight of the apparatus?

Discussion

2481.	Acid rains are produced by ___________.
Answer» Acid rains are produced by ___________.

Discussion

2482.	35. Select the wrong statement. (1) Radioactivity is a statistical process. (2) Radioactivity is a spontaneous process . (3) Radioactivity is a neutral characteristic of few elements. (4) Radioactive elements cannot be produced in the laboratory. What is meant by the term statistical?
Answer» 35. Select the wrong statement. (1) Radioactivity is a statistical process. (2) Radioactivity is a spontaneous process . (3) Radioactivity is a neutral characteristic of few elements. (4) Radioactive elements cannot be produced in the laboratory. What is meant by the term statistical?

Discussion

2483.	why in a solution of 60% sugar and 40% water water is taken as solvent and not sugar though sugar is present in larger amount and by definition Solvent is that component which is in same aggregate as that solution
Answer» why in a solution of 60% sugar and 40% water water is taken as solvent and not sugar though sugar is present in larger amount and by definition Solvent is that component which is in same aggregate as that solution

Discussion

2484.	Vitamin B12 contains cobalt in which oxidation state:
Answer» Vitamin $B_{12}$ contains cobalt in which oxidation state:

Discussion

2485.	Which of the following mixtures can be separated by the process of filtration?
Answer» Which of the following mixtures can be separated by the process of filtration?

Discussion

2486.	Which of the following are the postulates of Thomson’s model of an atom?
Answer» Which of the following are the postulates of Thomson’s model of an atom?

Discussion

2487.	Why only colloids have charge and not suspensions or true solutions?
Answer» Why only colloids have charge and not suspensions or true solutions?

Discussion

2488.	Draw a neat lablled diagramA. Ruthrford's scattering experimentB. Thomson's atomic modelC. Diagramatic sketch of electronic configurations of magnesium (Atomic number 12)D. Diagramatic sketeh of electronic configuration of Argon (Atomic number 18)
Answer» Draw a neat lablled diagram A. Ruthrford's scattering experiment B. Thomson's atomic model C. Diagramatic sketch of electronic configurations of magnesium (Atomic number 12) D. Diagramatic sketeh of electronic configuration of Argon (Atomic number 18)

Discussion

2489.	In my Pearson book it is written that Atmoic radius decreases due to increase in atomic number Also Ionization energy increases from top to bottom of a group since the atomic size decreases due to increase in atomic number Please explain sir
Answer» In my Pearson book it is written that Atmoic radius decreases due to increase in atomic number Also Ionization energy increases from top to bottom of a group since the atomic size decreases due to increase in atomic number Please explain sir

2489.

In my Pearson book it is written that Atmoic radius decreases due to increase in atomic number Also Ionization energy increases from top to bottom of a group since the atomic size decreases due to increase in atomic number Please explain sir

Answer»

In my Pearson book it is written that Atmoic radius decreases due to increase in atomic number

Also

Ionization energy increases from top to bottom of a group since the atomic size decreases due to increase in atomic number

Please explain sir

Discussion

2490.	Process not involved in downstream processing (1) screening (2) separation (3) purification (4) formulationExplain each term as well.
Answer» Process not involved in downstream processing (1) screening (2) separation (3) purification (4) formulation Explain each term as well.

Discussion

2491.	84. Cathode rays originated from cathode then why anode rays do not comes from anode? and from were they come?
Answer» 84. Cathode rays originated from cathode then why anode rays do not comes from anode? and from were they come?

Discussion

2492.	If two solid sphere having same mass but different density then their MOI of about any diameter is
Answer» If two solid sphere having same mass but different density then their MOI of about any diameter is

Discussion

2493.	(i) What is melting?(ii) What do you mean by melting point?(ii) How does melting take place?
Answer» (i) What is melting? (ii) What do you mean by melting point? (ii) How does melting take place?

Discussion

2494.	Compare and contrast the arrangement of elements in Mendeleev’s Periodic Table and the Modern Periodic Table.
Answer» Compare and contrast the arrangement of elements in Mendeleev’s Periodic Table and the Modern Periodic Table.

Discussion

2495.	Write the electronic configuration of any one pair of isotopes and isobar?
Answer» Write the electronic configuration of any one pair of isotopes and isobar?

Discussion

2496.	Choose the correct option that describes the reactions involved in photosynthesis. Statement 1: There are two reactions: Light and Dark Statement 2: Dark reactions occur only during night time Statement 3: Calvin-Benson Cycle is a part of the dark reaction
Answer» Choose the correct option that describes the reactions involved in photosynthesis. Statement 1: There are two reactions: Light and Dark Statement 2: Dark reactions occur only during night time Statement 3: Calvin-Benson Cycle is a part of the dark reaction

2496.

Choose the correct option that describes the reactions involved in photosynthesis. Statement 1: There are two reactions: Light and Dark Statement 2: Dark reactions occur only during night time Statement 3: Calvin-Benson Cycle is a part of the dark reaction

Answer»

Choose the correct option that describes the reactions involved in photosynthesis.

Statement 1: There are two reactions: Light and Dark

Statement 2: Dark reactions occur only during night time

Statement 3: Calvin-Benson Cycle is a part of the dark reaction

Discussion

2497.	The mass of an atom is constituted mainly by
Answer» The mass of an atom is constituted mainly by

2497.

The mass of an atom is constituted mainly by

Answer»

The mass of an atom is constituted mainly by

Discussion

2498.	How many isomeric diaminobenzoic acid can be converted into m-phenylenediamine on decarboxylation?
Answer» How many isomeric diaminobenzoic acid can be converted into m-phenylenediamine on decarboxylation?

Discussion

2499.	A boy was carrying out an experiment on the solubility of a gas in the water.He took a solute gas A and dissolved it in a liquid solvent(Water) B at a particular temperature T and pressure P.At that point he got some solubility value S. Later, he observed the value of solubility byi)increasing temperature of water from T to T' and ii)decreasing pressure on water surface from P to P'.He got the new solubility S'.Then what is the relationship between former solubility S and latter solubility S'?
Answer» A boy was carrying out an experiment on the solubility of a gas in the water.He took a solute gas A and dissolved it in a liquid solvent(Water) B at a particular temperature T and pressure P.At that point he got some solubility value S. Later, he observed the value of solubility by i)increasing temperature of water from T to T' and ii)decreasing pressure on water surface from P to P'. He got the new solubility S'.Then what is the relationship between former solubility S and latter solubility S'?

2499.

A boy was carrying out an experiment on the solubility of a gas in the water.He took a solute gas A and dissolved it in a liquid solvent(Water) B at a particular temperature T and pressure P.At that point he got some solubility value S. Later, he observed the value of solubility byi)increasing temperature of water from T to T' and ii)decreasing pressure on water surface from P to P'.He got the new solubility S'.Then what is the relationship between former solubility S and latter solubility S'?

Answer»

A boy was carrying out an experiment on the solubility of a gas in the water.He took a solute gas A and dissolved it in a liquid solvent(Water) B at a particular temperature T and pressure P.At that point he got some solubility value S. Later, he observed the value of solubility by

i)increasing temperature of water from T to T' and

ii)decreasing pressure on water surface from P to P'.

He got the new solubility S'.Then what is the relationship between former solubility S and latter solubility S'?

Discussion

2500.	What is principal quantum number and in that L is depend upon what
Answer» What is principal quantum number and in that L is depend upon what

Discussion

Explore topic-wise InterviewSolutions in .

Air is less dense than exhaust from chimneys. Why or why not ?

Explain why plastic containers are favoured for storing food.

Do solutions and suspensions show brownian movement and if they do then place the three types of mixtures in ascending order as per their degree of brownian motion.

Write postulates of Dalton’s atomic theory.

5 moles each of N2 and H2 gases are reacted in a vessel to form NH3. At equilibrium stage 30% of H2 gone converted into NH3. Calculate Kc for the reaction

what is mechanical impregnation technique

What is the greenhouse effect? Which gas is responsible for this?

84. 5g of a piece of marble was treated with excess of dil. HCl . When reaction was complete 448ml of CO2 was obtained at STP. The percentage of CaCO3 in the marble is -

What is the maximum capacity of shell- K to hold electrons?

Why is thermal stability of following compunds in the given order NaF

In an experiment the following reactions takes place:X + Y → Z2 g 4 g u gZ + A→ Bu g 7 g c gWhat is the value of u and c respectively?

At constant temperature, a gas occupies 11.2 liters at 0.860 atm. What is the pressure if the volume becomes 15.0 L?0.64

What type of magnel is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?

List of compounds having +M and -M effect

A closed container has air at 20°C. Some air at 50°C is inserted into the centre of the container. In which direction will this air move–upwards, downwards or not all?

49. What is the mole fraction of solute in 0.2 molal aqueous solution of urea? \lbrack(H2N)2CO 60\rbrack(1) 0.003(2) 0.02(3) 0.3(4) 0.03

Give the names and structural formula of the first three members of homologous series of alkene.

How will you separate iron pins from sand ?

Which of the following statement(s) is/are correct?to At 308 K, water exists as gaseous state(11) At 373 K. water only exists as gaseous state(i) At 283 K. water exists as liquid state( Only (iii)(2) Only (1)(3) Both (i) and (iii) (4) Both (ii) and (iii)

1.0 g of radium is reduced by 2.0 mg in 5 years by α-decay . calculate the half life of radium

Select the correct formula for the hydride ion.

The correct order of thermal stability of alkali metal hydrides is:

94.The bond energy order W.R.T MOT of CO, N2 CN,ethyene 1.CO>N2>CN>ethyene 2.N2>CO>ethyene>CN

List five activities that are possible due to the presence of air.

what name is given to reaction of ethanol with sodiu

Trace out the differences of elemental analysis done on living things and non-living things.

Question 4Write down the uses of Baking Soda.

Question 36How is ethene prepared from ethanol?

Density = ____

We have kept a burning candle inside a closed glass chamber with oxygen inside it. After some time what do you think will be the change in the weight of the apparatus?

Acid rains are produced by ___________.

35. Select the wrong statement. (1) Radioactivity is a statistical process. (2) Radioactivity is a spontaneous process . (3) Radioactivity is a neutral characteristic of few elements. (4) Radioactive elements cannot be produced in the laboratory. What is meant by the term statistical?

why in a solution of 60% sugar and 40% water water is taken as solvent and not sugar though sugar is present in larger amount and by definition Solvent is that component which is in same aggregate as that solution

Vitamin B12 contains cobalt in which oxidation state:

Which of the following mixtures can be separated by the process of filtration?

Which of the following are the postulates of Thomson’s model of an atom?

Why only colloids have charge and not suspensions or true solutions?

Draw a neat lablled diagramA. Ruthrford's scattering experimentB. Thomson's atomic modelC. Diagramatic sketch of electronic configurations of magnesium (Atomic number 12)D. Diagramatic sketeh of electronic configuration of Argon (Atomic number 18)

In my Pearson book it is written that Atmoic radius decreases due to increase in atomic number Also Ionization energy increases from top to bottom of a group since the atomic size decreases due to increase in atomic number Please explain sir

Process not involved in downstream processing (1) screening (2) separation (3) purification (4) formulationExplain each term as well.

84. Cathode rays originated from cathode then why anode rays do not comes from anode? and from were they come?

If two solid sphere having same mass but different density then their MOI of about any diameter is

(i) What is melting?(ii) What do you mean by melting point?(ii) How does melting take place?

Compare and contrast the arrangement of elements in Mendeleev’s Periodic Table and the Modern Periodic Table.

Write the electronic configuration of any one pair of isotopes and isobar?

Choose the correct option that describes the reactions involved in photosynthesis. Statement 1: There are two reactions: Light and Dark Statement 2: Dark reactions occur only during night time Statement 3: Calvin-Benson Cycle is a part of the dark reaction

The mass of an atom is constituted mainly by

How many isomeric diaminobenzoic acid can be converted into m-phenylenediamine on decarboxylation?

What is principal quantum number and in that L is depend upon what