10223 + Interview Questions in Chemistry Page 28 InterviewSolution

1351.	23.Consider the following as a possible nuclear reaction H(Z=1,A=2)+H(Z=1,A=2) ->He(Z=2,A=4) Given the energy per nucleon of the H and He nuclei as 1.1 MeV and 7 Mev respectively. choose the correct statement: 1) The reaction is not possible 2) The reaction can occur if H2 nuclei are given a total of 23.6 MeV energy. [L L. 3) The reaction occurs with a release of 25.8 MeV energy 4) The reaction occurs with a release of 23.6 MeV energy Click here to view details:
Answer» 23.Consider the following as a possible nuclear reaction H(Z=1,A=2)+H(Z=1,A=2) ->He(Z=2,A=4) Given the energy per nucleon of the H and He nuclei as 1.1 MeV and 7 Mev respectively. choose the correct statement: 1) The reaction is not possible 2) The reaction can occur if H2 nuclei are given a total of 23.6 MeV energy. [L L. 3) The reaction occurs with a release of 25.8 MeV energy 4) The reaction occurs with a release of 23.6 MeV energy Click here to view details:

Discussion

1352.	The common names of CaO and Ca(OH)2 respectively are
Answer» The common names of $C a O$ and $C a (O H)_{2}$ respectively are

Discussion

1353.	One end of a string is fixed with a wall and the other end has a point charge −10 nC. It is kept along the axis of a finite line charge as shown in figure. If string is plucked, then the speed of the wave generated will be:
Answer» One end of a string is fixed with a wall and the other end has a point charge $- 10 nC$ . It is kept along the axis of a finite line charge as shown in figure. If string is plucked, then the speed of the wave generated will be:

Discussion

1354.	Classify the following into elements and compounds : (i) H2O (ii) He (iii) Cl2 (iv) CO (v) Co
Answer» Classify the following into elements and compounds : (i) $H_{2} O$ (ii) He (iii) $C l_{2}$ (iv) CO (v) Co

1354.

Classify the following into elements and compounds : (i) H2O (ii) He (iii) Cl2 (iv) CO (v) Co

Answer»

Classify the following into elements and compounds :

(i) $H_{2} O$ (ii) He (iii) $C l_{2}$ (iv) CO (v) Co

Discussion

1355.	The density of ice is y gram/litre and that of water is x gram/ litre.what is the change in volume when m gram of ice melts?
Answer» The density of ice is y gram/litre and that of water is x gram/ litre.what is the change in volume when m gram of ice melts?

Discussion

1356.	Why CNG is more preferred than Petrol and Diesel ? Give any 2 reason.
Answer» Why CNG is more preferred than Petrol and Diesel ? Give any 2 reason.

Discussion

1357.	Identify the product 'P' formed in the given reaction. CaOCl2(s)+H2SO4(aq)→P+Cl2(g)+H2O(l)
Answer» Identify the product 'P' formed in the given reaction. ${CaOCl}_{2} (s) + H_{2} {SO}_{4} (aq) \to P + {Cl}_{2} (g) + H_{2} O (l)$

Discussion

1358.	If thermoset plastics can retain a high amount of pressure then why it is not used in nuclear reactors to hold the U235 pellets
Answer» If thermoset plastics can retain a high amount of pressure then why it is not used in nuclear reactors to hold the U235 pellets

Discussion

1359.	When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved, which is utilised in the hydrogenation of oil. Name the gas evolved. Write the chemical equation of the reaction involved and also write a test to detect the gas formed.
Answer» When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved, which is utilised in the hydrogenation of oil. Name the gas evolved. Write the chemical equation of the reaction involved and also write a test to detect the gas formed.

Discussion

1360.	When sugar is dissolved in water, why can't the individual particles of sugar be seen?
Answer» When sugar is dissolved in water, why can't the individual particles of sugar be seen?

Discussion

1361.	Question 13Which step is not involved in the carbon-cycle?(a) Photosynthesis(b) Transpiration(c) Respiration(d) Burning of fossil fuels
Answer» Question 13 Which step is not involved in the carbon-cycle? (a) Photosynthesis (b) Transpiration (c) Respiration (d) Burning of fossil fuels

Discussion

1362.	Burst the bubbles which gives 4 as an answer.
Answer» Burst the bubbles which gives 4 as an answer.

Discussion

1363.	What does the abbreviation amu stand for?
Answer» What does the abbreviation amu stand for?

Discussion

1364.	___ has the highest value of electron gain enthalpy.
Answer» ___ has the highest value of electron gain enthalpy.

Discussion

1365.	How would you separate iodine from a mixture of iodine and common salt?
Answer» How would you separate iodine from a mixture of iodine and common salt?

Discussion

1366.	65.A proton and an alpha particle enter a uniform magnetic field perpendicular with the same speed. If proton take 20×10*-6second to make 5revolution then the periodic time for the alpha particle would be
Answer» 65.A proton and an alpha particle enter a uniform magnetic field perpendicular with the same speed. If proton take 20×10*-6second to make 5revolution then the periodic time for the alpha particle would be

Discussion

1367.	Write balanced chemical equation for the reaction between zinc and dilute sulphuric acid.(i) What is the purpose of the contact process?(ii) Name the catalyst used in the contact process.(iii) Write the balanced equation for the reaction in the contact process, which takes place in the presence of catalyst.
Answer» Write balanced chemical equation for the reaction between zinc and dilute sulphuric acid. (i) What is the purpose of the contact process? (ii) Name the catalyst used in the contact process. (iii) Write the balanced equation for the reaction in the contact process, which takes place in the presence of catalyst.

Discussion

1368.	100 ml 0.1 M NaCL is mixed with 100ml 0.2 M Ca(NO3)2. Find concentration of NO3-, Cl-,Na+, Ca2+
Answer» 100 ml 0.1 M NaCL is mixed with 100ml 0.2 M Ca(NO3)2. Find concentration of NO3-, Cl-,Na+, Ca2+

Discussion

1369.	Would the oxidation state of each nitrogen be +1 in NO2(dinitrogen oxid)?
Answer» Would the oxidation state of each nitrogen be +1 in NO2(dinitrogen oxid)?

Discussion

1370.	Question 3What would happen, if all the oxygen present in the environment is converted to ozone?(a) We will be protected more(b) It will become poisonous and kill all living forms(c) Ozone is not stable, hence it will be toxic(d) It will help harmful sun radiations to reach earth and damage many life forms.
Answer» Question 3 What would happen, if all the oxygen present in the environment is converted to ozone? (a) We will be protected more (b) It will become poisonous and kill all living forms (c) Ozone is not stable, hence it will be toxic (d) It will help harmful sun radiations to reach earth and damage many life forms.

Discussion

1371.	when chloroform is hydrolsed with koh, then the final product is- hcooh or hcook or ch3oh or none of these
Answer» when chloroform is hydrolsed with koh, then the final product is- hcooh or hcook or ch3oh or none of these

Discussion

1372.	Calculate the mass 1 mole of sucrose (C12H22O11).
Answer» Calculate the mass 1 mole of sucrose $(C_{12} H_{22} O_{11})$ .

Discussion

1373.	672ml of ozonised oxygen at NTP were form to weight 1gm. Calculate volume of ozone in the ozonised oxygen.
Answer» 672ml of ozonised oxygen at NTP were form to weight 1gm. Calculate volume of ozone in the ozonised oxygen.

Discussion

1374.	Particle come out from unstable nucleus is an alpha particle. So when beta particle come out , on which condition of nucleus beta particle come out?
Answer» Particle come out from unstable nucleus is an alpha particle. So when beta particle come out , on which condition of nucleus beta particle come out?

Discussion

1375.	What is letent Heat ?
Answer» What is letent Heat ?

Discussion

1376.	How does magnesium reacts with water?
Answer» How does magnesium reacts with water?

Discussion

1377.	Calculate the oxidation number of underlined element in the following compound: Na2[Fe−(CN)5(NO+)]
Answer» Calculate the oxidation number of underlined element in the following compound: $N a_{2} [F e - (C N)_{5} (N O^{+})]$

Discussion

1378.	What are K, L, M, N shells?
Answer» What are K, L, M, N shells?

Discussion

1379.	Germanium is a:
Answer» Germanium is a:

Discussion

1380.	Write word-equation and balanced chemical equation for the following reactions. (i) Formation of hydrogen chloride from hydrogen and chlorine gas.(ii) Lead nitrate solution reacts with potassium iodide solution to give lead iodide and potassium nitrate.
Answer» Write word-equation and balanced chemical equation for the following reactions. (i) Formation of hydrogen chloride from hydrogen and chlorine gas. (ii) Lead nitrate solution reacts with potassium iodide solution to give lead iodide and potassium nitrate.

Discussion

1381.	Diffusion of solids in liquids .explain in simple words
Answer» Diffusion of solids in liquids .explain in simple words

Discussion

1382.	Mendeleev predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium?(a) Name the elements which have taken the place of these elements.(b) Mention the group and the period of these elements in the Modern Periodic Table.(c) Classify these elements as metals, nonmetals or metalloids.
Answer» Mendeleev predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium? (a) Name the elements which have taken the place of these elements. (b) Mention the group and the period of these elements in the Modern Periodic Table. (c) Classify these elements as metals, nonmetals or metalloids.

1382.

Mendeleev predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium?(a) Name the elements which have taken the place of these elements.(b) Mention the group and the period of these elements in the Modern Periodic Table.(c) Classify these elements as metals, nonmetals or metalloids.

Answer»

Mendeleev predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium?

(a) Name the elements which have taken the place of these elements.

(b) Mention the group and the period of these elements in the Modern Periodic Table.

(c) Classify these elements as metals, nonmetals or metalloids.

Discussion

1383.	49. Potassium exits in mainly two isotopic form,39k and 41k and their abundance in nature are 93% and 7%. What is the average atomic mass of potassium.
Answer» 49. Potassium exits in mainly two isotopic form,39k and 41k and their abundance in nature are 93% and 7%. What is the average atomic mass of potassium.

Discussion

1384.	Which of the following should be used as a disinfectant?
Answer» Which of the following should be used as a disinfectant?

Discussion

1385.	what is the product of calcium oxide and hydrogen nitrate?
Answer» what is the product of calcium oxide and hydrogen nitrate?

Discussion

1386.	Write the balanced equation for the reaction between barium chloride and sulphuric acid.
Answer» Write the balanced equation for the reaction between barium chloride and sulphuric acid.

Discussion

1387.	The amount of water vapour present in the air is known as ___
Answer» The amount of water vapour present in the air is known as ___

Discussion

1388.

Identify the incorrect match.NameIUPAC official name(A) Unnilunium(i) Mendelevium(B) Unniltrium(ii) Lawrencium(C) Unnilhexium(iii) Seaborgium(D) Unununnium(iv) Darmstadtium

Answer»

Identify the incorrect match.

Name	IUPAC official name
(A) Unnilunium	(i) Mendelevium
(B) Unniltrium	(ii) Lawrencium
(C) Unnilhexium	(iii) Seaborgium
(D) Unununnium	(iv) Darmstadtium

Discussion

1389.	How does melting point and boiling point vary across group?
Answer» How does melting point and boiling point vary across group?

Discussion

1390.	Select the correct option/s for Ostwald process.
Answer» Select the correct option/s for Ostwald process.

Discussion

1391.	42. If 25 g N2 reacts with H2 then amount of NH3 produced in reaction in gram? How much H2 will be required to produce that amount of NH3 ?
Answer» 42. If 25 g N2 reacts with H2 then amount of NH3 produced in reaction in gram? How much H2 will be required to produce that amount of NH3 ?

Discussion

1392.	what is pH? what to do with ACIDS and BASES with this?
Answer» what is pH? what to do with ACIDS and BASES with this?

1392.

what is pH? what to do with ACIDS and BASES with this?

Answer»

what is pH?

what to do with ACIDS and BASES with this?

Discussion

1393.	How to find valency of ions??
Answer» How to find valency of ions??

Discussion

1394.	146 What is the value of 0 degree Fahrenheit in celsius scale and 0 K on Fahrenheit scale.
Answer» 146 What is the value of 0 degree Fahrenheit in celsius scale and 0 K on Fahrenheit scale.

Discussion

1395.	(i) Describe Bohr's model of the atom. How did's Bohr explain the stability of atom? (ii) An element has an atomic number of 11 and its mass number is 23. What is the arrangement of electrons in the shells? State nuclear composition of an atom of the element.
Answer» (i) Describe Bohr's model of the atom. How did's Bohr explain the stability of atom? (ii) An element has an atomic number of 11 and its mass number is 23. What is the arrangement of electrons in the shells? State nuclear composition of an atom of the element.

Discussion

1396.	Calculate the pH when 500 ml, 0.1M NaOH(aq) is mixed with 250 ml, 0.5M CH3COOH(aq) solution at 25 degree Celsius. [Ka=1.8*10^-5 ; pKa=4.74]
Answer» Calculate the pH when 500 ml, 0.1M NaOH(aq) is mixed with 250 ml, 0.5M CH3COOH(aq) solution at 25 degree Celsius. [Ka=1.8*10^-5 ; pKa=4.74]

Discussion

1397.	At what pressure will a quantity of gas which occupies 100 ml at a pressure of 720 mm ocupy a volume of 84 ml
Answer» At what pressure will a quantity of gas which occupies 100 ml at a pressure of 720 mm ocupy a volume of 84 ml

Discussion

1398.	how to calculate body center in a compound easily?
Answer» how to calculate body center in a compound easily?

Discussion

1399.	The linear speed of the seconds hand of a wall clock is 1.05cm/s.What will be the length of the seconds hand
Answer» The linear speed of the seconds hand of a wall clock is 1.05cm/s.What will be the length of the seconds hand

Discussion

1400.	What is a proton? How does it differ from a neutron?
Answer» What is a proton? How does it differ from a neutron?

Discussion

Explore topic-wise InterviewSolutions in .

The common names of CaO and Ca(OH)2 respectively are

One end of a string is fixed with a wall and the other end has a point charge −10 nC. It is kept along the axis of a finite line charge as shown in figure. If string is plucked, then the speed of the wave generated will be:

Classify the following into elements and compounds : (i) H2O (ii) He (iii) Cl2 (iv) CO (v) Co

The density of ice is y gram/litre and that of water is x gram/ litre.what is the change in volume when m gram of ice melts?

Why CNG is more preferred than Petrol and Diesel ? Give any 2 reason.

Identify the product 'P' formed in the given reaction. CaOCl2(s)+H2SO4(aq)→P+Cl2(g)+H2O(l)

If thermoset plastics can retain a high amount of pressure then why it is not used in nuclear reactors to hold the U235 pellets

When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved, which is utilised in the hydrogenation of oil. Name the gas evolved. Write the chemical equation of the reaction involved and also write a test to detect the gas formed.

When sugar is dissolved in water, why can't the individual particles of sugar be seen?

Question 13Which step is not involved in the carbon-cycle?(a) Photosynthesis(b) Transpiration(c) Respiration(d) Burning of fossil fuels

Burst the bubbles which gives 4 as an answer.

What does the abbreviation amu stand for?

___ has the highest value of electron gain enthalpy.

How would you separate iodine from a mixture of iodine and common salt?

65.A proton and an alpha particle enter a uniform magnetic field perpendicular with the same speed. If proton take 20×10*-6second to make 5revolution then the periodic time for the alpha particle would be

100 ml 0.1 M NaCL is mixed with 100ml 0.2 M Ca(NO3)2. Find concentration of NO3-, Cl-,Na+, Ca2+

Would the oxidation state of each nitrogen be +1 in NO2(dinitrogen oxid)?

when chloroform is hydrolsed with koh, then the final product is- hcooh or hcook or ch3oh or none of these

Calculate the mass 1 mole of sucrose (C12H22O11).

672ml of ozonised oxygen at NTP were form to weight 1gm. Calculate volume of ozone in the ozonised oxygen.

Particle come out from unstable nucleus is an alpha particle. So when beta particle come out , on which condition of nucleus beta particle come out?

What is letent Heat ?

How does magnesium reacts with water?

Calculate the oxidation number of underlined element in the following compound: Na2[Fe−(CN)5(NO+)]

What are K, L, M, N shells?

Germanium is a:

Write word-equation and balanced chemical equation for the following reactions. (i) Formation of hydrogen chloride from hydrogen and chlorine gas.(ii) Lead nitrate solution reacts with potassium iodide solution to give lead iodide and potassium nitrate.

Diffusion of solids in liquids .explain in simple words

49. Potassium exits in mainly two isotopic form,39k and 41k and their abundance in nature are 93% and 7%. What is the average atomic mass of potassium.

Which of the following should be used as a disinfectant?

what is the product of calcium oxide and hydrogen nitrate?

Write the balanced equation for the reaction between barium chloride and sulphuric acid.

The amount of water vapour present in the air is known as ___

Identify the incorrect match.NameIUPAC official name(A) Unnilunium(i) Mendelevium(B) Unniltrium(ii) Lawrencium(C) Unnilhexium(iii) Seaborgium(D) Unununnium(iv) Darmstadtium

How does melting point and boiling point vary across group?

Select the correct option/s for Ostwald process.

42. If 25 g N2 reacts with H2 then amount of NH3 produced in reaction in gram? How much H2 will be required to produce that amount of NH3 ?

what is pH? what to do with ACIDS and BASES with this?

How to find valency of ions??

146 What is the value of 0 degree Fahrenheit in celsius scale and 0 K on Fahrenheit scale.

(i) Describe Bohr's model of the atom. How did's Bohr explain the stability of atom? ​(ii) An element has an atomic number of 11 and its mass number is 23. What is the arrangement of electrons in the shells? State nuclear composition of an atom of the element.

Calculate the pH when 500 ml, 0.1M NaOH(aq) is mixed with 250 ml, 0.5M CH3COOH(aq) solution at 25 degree Celsius. [Ka=1.8*10^-5 ; pKa=4.74]

At what pressure will a quantity of gas which occupies 100 ml at a pressure of 720 mm ocupy a volume of 84 ml

how to calculate body center in a compound easily?

The linear speed of the seconds hand of a wall clock is 1.05cm/s.What will be the length of the seconds hand

What is a proton? How does it differ from a neutron?

(i) Describe Bohr's model of the atom. How did's Bohr explain the stability of atom? (ii) An element has an atomic number of 11 and its mass number is 23. What is the arrangement of electrons in the shells? State nuclear composition of an atom of the element.