10223 + Interview Questions in Chemistry Page 95 InterviewSolution

4701.	The tenth elements in the periodic table resembles with the(b) Second period(d) Ninth group(a) First period(c) Fourth group . how?kindly.give the explanation
Answer» The tenth elements in the periodic table resembles with the(b) Second period(d) Ninth group(a) First period(c) Fourth group . how?kindly.give the explanation

Discussion

4702.	Give the name of the reactions in which energy is absorbed during the reactions.
Answer» Give the name of the reactions in which energy is absorbed during the reactions.

Discussion

4703.	25 ml of solution of Ba(OH)_2, on titration with 1M-solution of hydrochloric acid gave a titre value of 3.5 ml. The molarity of Ba(OH)_{}, solution was
Answer» 25 ml of solution of Ba(OH)_2, on titration with 1M-solution of hydrochloric acid gave a titre value of 3.5 ml. The molarity of Ba(OH)_{}, solution was

Discussion

4704.	Question 30Match the names of the Scientists given in Column A with their contributions towards the understanding of the atomic structure as given in Column B. A B(a) Ernest Rutherford (i) Indivisibility of atoms(b) J.J.Thomson (ii) Stationary orbits(c) Dalton (iii) Concept of nucleus(d) Neils Bohr (iv) Discovery of electrons(e) James Chadwick (v) Atomic number(f) E. Goldstein (vi) Neutron(g) Mosley (vii) Canal rays
Answer» Question 30 Match the names of the Scientists given in Column A with their contributions towards the understanding of the atomic structure as given in Column B. A B (a) Ernest Rutherford (i) Indivisibility of atoms (b) J.J.Thomson (ii) Stationary orbits (c) Dalton (iii) Concept of nucleus (d) Neils Bohr (iv) Discovery of electrons (e) James Chadwick (v) Atomic number (f) E. Goldstein (vi) Neutron (g) Mosley (vii) Canal rays

Discussion

4705.	4. What is the covalency of B in [B(OH)4] with negative sign and its oxidation state.
Answer» 4. What is the covalency of B in [B(OH)4] with negative sign and its oxidation state.

Discussion

4706.	How do you define a chemical change? Give two or three examples of chemical change. Choose the correct characteristic(s) about the chemical change from the following Characteristic 1: chemical changes are irreversibleCharacteristic 2: new substances are formed.Characteristic 3: properties of new substances are the same as the properties of original substances.
Answer» How do you define a chemical change? Give two or three examples of chemical change. Choose the correct characteristic(s) about the chemical change from the following Characteristic 1: chemical changes are irreversible Characteristic 2: new substances are formed. Characteristic 3: properties of new substances are the same as the properties of original substances.

4706.

How do you define a chemical change? Give two or three examples of chemical change. Choose the correct characteristic(s) about the chemical change from the following Characteristic 1: chemical changes are irreversibleCharacteristic 2: new substances are formed.Characteristic 3: properties of new substances are the same as the properties of original substances.

Answer»

How do you define a chemical change?

Give two or three examples of chemical change.

Choose the correct characteristic(s) about the chemical change from the following

Characteristic 1: chemical changes are irreversible

Characteristic 2: new substances are formed.

Characteristic 3: properties of new substances are the same as the properties of original substances.

Discussion

4707.	Write the steps you would use for making tea.Use the words given below and writethe steps for making tea?Solution, solvent, solute, dissolve, soluble,insoluble, filtrate and residue
Answer» Write the steps you would use for making tea. Use the words given below and write the steps for making tea? Solution, solvent, solute, dissolve, soluble, insoluble, filtrate and residue

Discussion

4708.	An LPG cylinder can withstand a pressure of 14.9 atm. The pressure gauge of the cylinder indicates 12 atm at 27 degree celsius. Due to a sudden fire in the building the temperature rises.At what temperature will the cylinder explode?
Answer» An LPG cylinder can withstand a pressure of 14.9 atm. The pressure gauge of the cylinder indicates 12 atm at 27 degree celsius. Due to a sudden fire in the building the temperature rises.At what temperature will the cylinder explode?

Discussion

4709.	Question 1The mass per unit volume of a substance is called density (density = mass/volume). Arrange the following in order of increasing density - air, exhaust from chimney, honey, water, chalk, cotton, and iron.
Answer» Question 1 The mass per unit volume of a substance is called density (density = mass/volume). Arrange the following in order of increasing density - air, exhaust from chimney, honey, water, chalk, cotton, and iron.

Discussion

4710.	What is dissociation in Chemistry?
Answer» What is dissociation in Chemistry?

Discussion

4711.	17 The decreasing order of the boiling points of the following hydrides is 1)NH3 2)PH3 3)AsH3 4)SbH3 5)H2O
Answer» 17 The decreasing order of the boiling points of the following hydrides is 1)NH3 2)PH3 3)AsH3 4)SbH3 5)H2O

Discussion

4712.	What are noble metals? Give examples. Which element is considered as a reference in the metal reactivity series?
Answer» What are noble metals? Give examples. Which element is considered as a reference in the metal reactivity series?

Discussion

4713.	Question 15 A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him, which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset but after a futile argument the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?
Answer» Question 15 A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him, which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset but after a futile argument the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?

Discussion

4714.	Why are atoms so small in size?
Answer» Why are atoms so small in size?

Discussion

4715.	what is additional compound?
Answer» what is additional compound?

Discussion

4716.	Arrange the substances on the increasing order of their atomicity (top to bottom)
Answer» Arrange the substances on the increasing order of their atomicity (top to bottom)

Discussion

4717.	In a cubic lattice atoms are arranged A at corners, B at the face centers , C at edge and body center and 2D at triads tetrahedral voids then the body diagonal touches
Answer» In a cubic lattice atoms are arranged A at corners, B at the face centers , C at edge and body center and 2D at triads tetrahedral voids then the body diagonal touches

Discussion

4718.	The freezing and boiling points of a substance P are -220℃ and -185℃ respectively. At which of the following range of temperatures will P exist as a liquid? (A) Between -175℃and -210℃ (B) Between -190℃ and -225℃ (C) Between -200℃ and -160℃ (D) Between -195℃ and -215℃
Answer» The freezing and boiling points of a substance P are -220℃ and -185℃ respectively. At which of the following range of temperatures will P exist as a liquid? (A) Between -175℃and -210℃ (B) Between -190℃ and -225℃ (C) Between -200℃ and -160℃ (D) Between -195℃ and -215℃

Discussion

4719.	Explain the effect of sulphur dioxide on the atmosphere.
Answer» Explain the effect of sulphur dioxide on the atmosphere.

Discussion

4720.	What are the forms of oxygen
Answer» What are the forms of oxygen

Discussion

4721.	The major constituent of natural gas is:
Answer» The major constituent of natural gas is:

Discussion

4722.	Anode ray is also called ___ as it travels from ___ and passes through ___.
Answer» Anode ray is also called ___ as it travels from ___ and passes through ___.

Discussion

4723.	What are compounds and mixtures?
Answer» What are compounds and mixtures?

Discussion

4724.	Write the uses of derivatives of coal.
Answer» Write the uses of derivatives of coal.

Discussion

4725.	निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − मिट्टी की आभा क्या है? उसकी पहचान किससे होती है?
Answer» निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − मिट्टी की आभा क्या है? उसकी पहचान किससे होती है?

4725.

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − मिट्टी की आभा क्या है? उसकी पहचान किससे होती है?

Answer»

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए −

मिट्टी की आभा क्या है? उसकी पहचान किससे होती है?

Discussion

4726.	What is the difference between vaporization and evaporation
Answer» What is the difference between vaporization and evaporation

Discussion

4727.	How did sciencetist know what's the atomic number of every atom?
Answer» How did sciencetist know what's the atomic number of every atom?

Discussion

4728.	When drops of blue litmus solutions are added to dil. HCl and aqueous NaOH taken in two different test tubes A and B respectively, what will be the colour changes occurring?
Answer» When drops of blue litmus solutions are added to dil. HCl and aqueous NaOH taken in two different test tubes A and B respectively, what will be the colour changes occurring?

Discussion

4729.	electronic configuration of Rb
Answer» electronic configuration of Rb

Discussion

4730.	Write a short note on pH.
Answer» Write a short note on pH.

Discussion

4731.	What is the meaning of pressure variations or density variations in the medium?
Answer» What is the meaning of pressure variations or density variations in the medium?

Discussion

4732.	5. In 0.2 mole of CD4 find 1. number of mole of electron. 2.mass of D2. 3. Mass of CD4 4. Number of mole of C
Answer» 5. In 0.2 mole of CD4 find 1. number of mole of electron. 2.mass of D2. 3. Mass of CD4 4. Number of mole of C

Discussion

4733.	Select the correct formula for the Hydride ion.
Answer» Select the correct formula for the Hydride ion.

Discussion

4734.	Fractional distillation is the separation of a mixture into its component or fractions. This process is based on difference in boiling point of the components in the mixture. This is a special type of distillation.Air is a homogeneous mixture of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases such as helium, krypton, nitrogen dioxide etc.Consider three gases oxygen, nitrogen and argon whose boiling points are: -183, -196, -186 degree celsius. They are to be separated from air using fractional distillation.Air is compressed by increasing pressure and is then cooled by decreasing the temperature to form liquid air. This liquid air is allowed to warm-up slowly in a fractional distillation column, where gases get separated at different heights depending upon their boiling points. As the height of tower increases the temperature increases.Among the three gases, which gas is collected at last?
Answer» Fractional distillation is the separation of a mixture into its component or fractions. This process is based on difference in boiling point of the components in the mixture. This is a special type of distillation. Air is a homogeneous mixture of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases such as helium, krypton, nitrogen dioxide etc. Consider three gases oxygen, nitrogen and argon whose boiling points are: -183, -196, -186 degree celsius. They are to be separated from air using fractional distillation. Air is compressed by increasing pressure and is then cooled by decreasing the temperature to form liquid air. This liquid air is allowed to warm-up slowly in a fractional distillation column, where gases get separated at different heights depending upon their boiling points. As the height of tower increases the temperature increases. Among the three gases, which gas is collected at last?

4734.

Fractional distillation is the separation of a mixture into its component or fractions. This process is based on difference in boiling point of the components in the mixture. This is a special type of distillation.Air is a homogeneous mixture of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases such as helium, krypton, nitrogen dioxide etc.Consider three gases oxygen, nitrogen and argon whose boiling points are: -183, -196, -186 degree celsius. They are to be separated from air using fractional distillation.Air is compressed by increasing pressure and is then cooled by decreasing the temperature to form liquid air. This liquid air is allowed to warm-up slowly in a fractional distillation column, where gases get separated at different heights depending upon their boiling points. As the height of tower increases the temperature increases.Among the three gases, which gas is collected at last?

Answer»

Fractional distillation is the separation of a mixture into its component or fractions. This process is based on difference in boiling point of the components in the mixture. This is a special type of distillation.

Air is a homogeneous mixture of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases such as helium, krypton, nitrogen dioxide etc.

Consider three gases oxygen, nitrogen and argon whose boiling points are: -183, -196, -186 degree celsius. They are to be separated from air using fractional distillation.

Air is compressed by increasing pressure and is then cooled by decreasing the temperature to form liquid air. This liquid air is allowed to warm-up slowly in a fractional distillation column, where gases get separated at different heights depending upon their boiling points. As the height of tower increases the temperature increases.

Among the three gases, which gas is collected at last?

Discussion

4735.	5. A sample of CaCO, has Ca = 40%, C = 12% andO 48%. If law of constant proportions is true, then theweight of calcium in 4g of sample of Caco, obtained from another source will be(2) 1.6 g(1) 16 g(4) 0.016 g(3) 0.16 g
Answer» 5. A sample of CaCO, has Ca = 40%, C = 12% andO 48%. If law of constant proportions is true, then theweight of calcium in 4g of sample of Caco, obtained from another source will be(2) 1.6 g(1) 16 g(4) 0.016 g(3) 0.16 g

Discussion

4736.	Which of the following can reduce ZnO: a)H_2O b)CO c)coke d)CO_2
Answer» Which of the following can reduce ZnO: a)H_2O b)CO c)coke d)CO_2

Discussion

4737.	Will the energy level of the outermost valence shell will have highest energy as compared to that of energy level of inner orbitals
Answer» Will the energy level of the outermost valence shell will have highest energy as compared to that of energy level of inner orbitals

Discussion

4738.	Why are napthalene balls kept in clothes to be put away ?
Answer» Why are napthalene balls kept in clothes to be put away ?

4738.

Why are napthalene balls kept in clothes to be put away ?

Answer»

Why are napthalene balls kept in clothes to be put away

?

Discussion

4739.	49.In a closed system:A solid is in equillibrum with 2B gas+3C gas if the partial pressure of C is doubled then partial pressure of B will be
Answer» 49.In a closed system:A solid is in equillibrum with 2B gas+3C gas if the partial pressure of C is doubled then partial pressure of B will be

Discussion

4740.	bank bubble burst cross river shoes splash
Answer» bank bubble burst cross river shoes splash

Discussion

4741.	how to find the total amount of an element in a compund? is it by multiplying its atomic mass to its valency?
Answer» how to find the total amount of an element in a compund? is it by multiplying its atomic mass to its valency?

Discussion

4742.	Which of the following is a correct statement?
Answer» Which of the following is a correct statement?

Discussion

4743.	characterstics of particles of matter
Answer» characterstics of particles of matter

Discussion

4744.	36 Write the name and formula of cleaning powder. What happens when bleaching powder reacts with CO2. Mention 2 uses of bleaching powder?
Answer» 36 Write the name and formula of cleaning powder. What happens when bleaching powder reacts with CO2. Mention 2 uses of bleaching powder?

Discussion

4745.	7. In psi 3,2,1 the orbital angular momentum and angular node respectively are
Answer» 7. In psi 3,2,1 the orbital angular momentum and angular node respectively are

Discussion

4746.	Question 43In the gold foil experiment of Geiger and Marsden, that paved the way for Rutherford's model of an atom, 1.00% of the alpha-particles were found to deflect at angles >50∘. If one mole of alpha-particles were bombarded on the gold foil, compute the number of alpha-particles that would deflect at angles less than50∘.
Answer» Question 43 In the gold foil experiment of Geiger and Marsden, that paved the way for Rutherford's model of an atom, $1.00 %$ of the alpha-particles were found to deflect at angles $> 50^{\circ}$ . If one mole of alpha-particles were bombarded on the gold foil, compute the number of alpha-particles that would deflect at angles less than $50^{\circ}$ .

Discussion

4747.	23. Difference between hypervalent and hypovalent species?
Answer» 23. Difference between hypervalent and hypovalent species?

Discussion

4748.	Electrons should be filled in the various shells one by one in the order of increasing energy according to _____rule
Answer» Electrons should be filled in the various shells one by one in the order of increasing energy according to _____rule

Discussion

4749.	Identify the elements that weren't arranged in the increasing order of atomic mass in the Mendeleev's periodic table.
Answer» Identify the elements that weren't arranged in the increasing order of atomic mass in the Mendeleev's periodic table.

Discussion

4750.	Type D. On Angular nomentum21. Find the angular momentum of neptune about the sun.Given distance of neptune from the sun is 5 x 10^12 m,period of revolution about the sun = 5 x 10^9 s and mass ofneptune = 10^27 kg.
Answer» Type D. On Angular nomentum 21. Find the angular momentum of neptune about the sun. Given distance of neptune from the sun is 5 x 10^12 m, period of revolution about the sun = 5 x 10^9 s and mass of neptune = 10^27 kg.

Discussion

Explore topic-wise InterviewSolutions in .

The tenth elements in the periodic table resembles with the(b) Second period(d) Ninth group(a) First period(c) Fourth group . how?kindly.give the explanation

Give the name of the reactions in which energy is absorbed during the reactions.

25 ml of solution of Ba(OH)_2, on titration with 1M-solution of hydrochloric acid gave a titre value of 3.5 ml. The molarity of Ba(OH)_{}, solution was

4. What is the covalency of B in [B(OH)4] with negative sign and its oxidation state.

Write the steps you would use for making tea.Use the words given below and writethe steps for making tea?Solution, solvent, solute, dissolve, soluble,insoluble, filtrate and residue

An LPG cylinder can withstand a pressure of 14.9 atm. The pressure gauge of the cylinder indicates 12 atm at 27 degree celsius. Due to a sudden fire in the building the temperature rises.At what temperature will the cylinder explode?

Question 1The mass per unit volume of a substance is called density (density = mass/volume). Arrange the following in order of increasing density - air, exhaust from chimney, honey, water, chalk, cotton, and iron.

What is dissociation in Chemistry?

17 The decreasing order of the boiling points of the following hydrides is 1)NH3 2)PH3 3)AsH3 4)SbH3 5)H2O

What are noble metals? Give examples. Which element is considered as a reference in the metal reactivity series?

Why are atoms so small in size?

what is additional compound?

Arrange the substances on the increasing order of their atomicity (top to bottom)

In a cubic lattice atoms are arranged A at corners, B at the face centers , C at edge and body center and 2D at triads tetrahedral voids then the body diagonal touches

The freezing and boiling points of a substance P are -220℃ and -185℃ respectively. At which of the following range of temperatures will P exist as a liquid? (A) Between -175℃and -210℃ (B) Between -190℃ and -225℃ (C) Between -200℃ and -160℃ (D) Between -195℃ and -215℃

Explain the effect of sulphur dioxide on the atmosphere.

What are the forms of oxygen

The major constituent of natural gas is:

Anode ray is also called ___ as it travels from ___ and passes through ___.

What are compounds and mixtures?

Write the uses of derivatives of coal.

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − मिट्टी की आभा क्या है? उसकी पहचान किससे होती है?

What is the difference between vaporization and evaporation

How did sciencetist know what's the atomic number of every atom?

When drops of blue litmus solutions are added to dil. HCl and aqueous NaOH taken in two different test tubes A and B respectively, what will be the colour changes occurring?

electronic configuration of Rb

Write a short note on pH.

What is the meaning of pressure variations or density variations in the medium?

5. In 0.2 mole of CD4 find 1. number of mole of electron. 2.mass of D2. 3. Mass of CD4 4. Number of mole of C

Select the correct formula for the Hydride ion.

5. A sample of CaCO, has Ca = 40%, C = 12% andO 48%. If law of constant proportions is true, then theweight of calcium in 4g of sample of Caco, obtained from another source will be(2) 1.6 g(1) 16 g(4) 0.016 g(3) 0.16 g

Which of the following can reduce ZnO: a)H_2O b)CO c)coke d)CO_2

Will the energy level of the outermost valence shell will have highest energy as compared to that of energy level of inner orbitals

Why are napthalene balls kept in clothes to be put away ?

49.In a closed system:A solid is in equillibrum with 2B gas+3C gas if the partial pressure of C is doubled then partial pressure of B will be

bank bubble burst cross river shoes splash

how to find the total amount of an element in a compund? is it by multiplying its atomic mass to its valency?

Which of the following is a correct statement?

characterstics of particles of matter

36 Write the name and formula of cleaning powder. What happens when bleaching powder reacts with CO2. Mention 2 uses of bleaching powder?

7. In psi 3,2,1 the orbital angular momentum and angular node respectively are

23. Difference between hypervalent and hypovalent species?

Electrons should be filled in the various shells one by one in the order of increasing energy according to _____rule

Identify the elements that weren't arranged in the increasing order of atomic mass in the Mendeleev's periodic table.

Type D. On Angular nomentum21. Find the angular momentum of neptune about the sun.Given distance of neptune from the sun is 5 x 10^12 m,period of revolution about the sun = 5 x 10^9 s and mass ofneptune = 10^27 kg.

Anode ray is also called _ as it travels from _ and passes through ___.