10223 + Interview Questions in Chemistry

1.	The equivlent weight of an element is 4. Its chloride has a vapour density 59.25. The formula of its oxide will be (1) M_2O_3 (2) MO (3) M_3O_4 (4) MO_2
Answer» The equivlent weight of an element is 4. Its chloride has a vapour density 59.25. The formula of its oxide will be (1) M_2O_3 (2) MO (3) M_3O_4 (4) MO_2

Discussion

2.	CH3CHO and CH3COCH3 can not be distinguished by : (1) Fehling solution (2) Grignard reagent (3) Schiff's reagent (4) Tollen's reagent (Explain about each option to clear concept)
Answer» CH3CHO and CH3COCH3 can not be distinguished by : (1) Fehling solution (2) Grignard reagent (3) Schiff's reagent (4) Tollen's reagent (Explain about each option to clear concept)

Discussion

3.	Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.
Answer» Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.

Discussion

4.	When calculating reaction quotient do we convert the partial pressure given in atm into Pascal?
Answer» When calculating reaction quotient do we convert the partial pressure given in atm into Pascal?

Discussion

5.	Mole fraction of ethanol and water mixture is 0.25 . Hence percentage concentration of ethanol by weight of mixture is........
Answer» Mole fraction of ethanol and water mixture is 0.25 . Hence percentage concentration of ethanol by weight of mixture is........

Discussion

6.	What is a combination reaction?
Answer» What is a combination reaction?

Discussion

7.	74.Arrange ortho hydroxybenzoic acid (1), meta hydroxybenzoic acid (2),para hydroxybenzoic acid (3), benzoic acid (4)in order of decreasing acid strength.
Answer» 74.Arrange ortho hydroxybenzoic acid (1), meta hydroxybenzoic acid (2),para hydroxybenzoic acid (3), benzoic acid (4)in order of decreasing acid strength.

Discussion

8.	Cutting of wood is a physical change, Explain why? The burning of wood is a chemical change, Explain why?
Answer» Cutting of wood is a physical change, Explain why? The burning of wood is a chemical change, Explain why?

Discussion

9.	Question 27The difference in the mass of 100 moles each of sodium atoms and sodium ions is 5.48002 g.Compute the mass of an electron.
Answer» Question 27 The difference in the mass of 100 moles each of sodium atoms and sodium ions is 5.48002 g.Compute the mass of an electron.

Discussion

10.	Give one major drawback of Dalton's atomic theory of matter. Dalton's atomic theory says that atoms are indivisible. Is this statement still valid? Give reasons for your answer.
Answer» Give one major drawback of Dalton's atomic theory of matter. Dalton's atomic theory says that atoms are indivisible. Is this statement still valid? Give reasons for your answer.

Discussion

11.	Question 3.1 Identify the substance that is oxidized and the substance that is reduced in the following reaction: 4Na (s)+O2(g)→2Na2O(s)
Answer» Question 3.1 Identify the substance that is oxidized and the substance that is reduced in the following reaction: $4 Na (s) + O_{2} (g) \to 2 {Na}_{2} O(s)$

Discussion

12.	During the practical in the lab when hydrogen sulphide gas having offensive odour is prepared for some test, we can smell hte gas even 50 metres away. Explain hte phenomenon.
Answer» During the practical in the lab when hydrogen sulphide gas having offensive odour is prepared for some test, we can smell hte gas even 50 metres away. Explain hte phenomenon.

Discussion

13.	the physical quantities of dimensions of lenght that can be formed out of c,g and e2/4piee0 is??
Answer» the physical quantities of dimensions of lenght that can be formed out of c,g and e2/4piee0 is??

Discussion

14.	why Hydrogen is not included in s, p, d ,f blocks in the periodic table?
Answer» why Hydrogen is not included in s, p, d ,f blocks in the periodic table?

Discussion

15.	Statements: N J, J % R, R © H Conclusions: a) R # N b) N © H
Answer» Statements: N J, J % R, R © H Conclusions: a) R # N b) N © H

15.

Statements: N J, J % R, R © H Conclusions: a) R # N b) N © H

Answer»

Statements: N J, J % R, R © H

Conclusions:

a) R # N

b) N © H

Discussion

16.	Why is there a difference in sound when dropping a metal coin vs a lump of coal?
Answer» Why is there a difference in sound when dropping a metal coin vs a lump of coal?

Discussion

17.	If energy of subshell depends only on 'n' instead of 'n+1' each orbital can accomodate maximum upto one electron, then for an element having atomic number is 33, incorret statement is (1) Group number is 5 and period number is 4 (2) Period number is 5 (3) Last shell has only 1 electron (4) Last electron is in the 4th sh
Answer» If energy of subshell depends only on 'n' instead of 'n+1' each orbital can accomodate maximum upto one electron, then for an element having atomic number is 33, incorret statement is (1) Group number is 5 and period number is 4 (2) Period number is 5 (3) Last shell has only 1 electron (4) Last electron is in the 4th sh

Discussion

18.	Explain the following terms with one example each.(a) Corrosion(b) Rancidity
Answer» Explain the following terms with one example each. (a) Corrosion (b) Rancidity

Discussion

19.	Clouds are ___ collections of tiny water droplets and crystallized water molecules.
Answer» Clouds are ___ collections of tiny water droplets and crystallized water molecules.

Discussion

20.	Why only helium is filled in balloons?? Hydrogen and nitrogen are also light in weight.then why we don't use these gases??
Answer» Why only helium is filled in balloons?? Hydrogen and nitrogen are also light in weight.then why we don't use these gases??

20.

Why only helium is filled in balloons?? Hydrogen and nitrogen are also light in weight.then why we don't use these gases??

Answer»

Why only helium is filled in balloons??

Hydrogen and nitrogen are also light in weight.then why we don't use these gases??

Discussion

21.	Af U of formation of CH4 (g) at certain temperature is 393 kJ mol1. The value of A, H is(b) < A, Ue(d) equal to A, Uo(a) zero()> A†extcent U†extcopyright
Answer» Af U of formation of CH4 (g) at certain temperature is 393 kJ mol1. The value of A, H is(b) < A, Ue(d) equal to A, Uo(a) zero()> A†extcent U†extcopyright

Discussion

22.	What is the meaning of electropositivity and electronegativity?
Answer» What is the meaning of electropositivity and electronegativity?

Discussion

23.	Give scientific reasons:(a) An atom is electrically neutral though it contains charged particles.(b) Two electrons in Helium are placed in only one shell while three electrons in Lithium occupy two shells.
Answer» Give scientific reasons: (a) An atom is electrically neutral though it contains charged particles. (b) Two electrons in Helium are placed in only one shell while three electrons in Lithium occupy two shells.

23.

Give scientific reasons:(a) An atom is electrically neutral though it contains charged particles.(b) Two electrons in Helium are placed in only one shell while three electrons in Lithium occupy two shells.

Answer»

Give scientific reasons:

(a) An atom is electrically neutral though it contains charged particles.

(b) Two electrons in Helium are placed in only one shell while three electrons in Lithium occupy two shells.

Discussion

24.	Which of the following is/are not compressible?
Answer» Which of the following is/are not compressible?

Discussion

25.	Write the steps you would use for preparing lemonade. Use the words solution, solvent, solute, dissolve, soluble, insoluble, filtrate, and residue.
Answer» Write the steps you would use for preparing lemonade. Use the words solution, solvent, solute, dissolve, soluble, insoluble, filtrate, and residue.

Discussion

26.	Question 5 (a) What is the physical state of water at— (a)25∘C
Answer» Question 5 (a) What is the physical state of water at— $(a) 25^{\circ} C$

Discussion

27.	Which bond is formed by the sharing of electrons?
Answer» Which bond is formed by the sharing of electrons?

Discussion

28.	36. An electron makes 5 crests during one revolution round H nucleus . The electron belongs from which orbit and why?
Answer» 36. An electron makes 5 crests during one revolution round H nucleus . The electron belongs from which orbit and why?

Discussion

29.	Hello sir ..!! Greetings Happy teachers day Sir!! Sir .when I read the theory in chemistry there is not much questions asked in it Is there any book for chemistry that has questions to work out to test my knowledge You can suggest me 2 or more books sir Thanking you
Answer» Hello sir ..!! Greetings Happy teachers day Sir!! Sir .when I read the theory in chemistry there is not much questions asked in it Is there any book for chemistry that has questions to work out to test my knowledge You can suggest me 2 or more books sir Thanking you

29.

Hello sir ..!! Greetings Happy teachers day Sir!! Sir .when I read the theory in chemistry there is not much questions asked in it Is there any book for chemistry that has questions to work out to test my knowledge You can suggest me 2 or more books sir Thanking you

Answer»

Hello sir ..!!

Greetings Happy teachers day Sir!!

Sir .when I read the theory in chemistry there is not much questions asked in it

Is there any book for chemistry that has questions to work out to test my knowledge

You can suggest me 2 or more books sir

Thanking you

Discussion

30.	Why should a cation like Na+ should act as a Lewis acid and tend to accept an electron although it has already attained stability by having a Nobel gas configuration?
Answer» Why should a cation like Na+ should act as a Lewis acid and tend to accept an electron although it has already attained stability by having a Nobel gas configuration?

Discussion

31.	Which part of an atom was discovered by Rutherford?
Answer» Which part of an atom was discovered by Rutherford?

Discussion

32.	What is the chemical formula for aluminium oxide?
Answer» What is the chemical formula for aluminium oxide?

Discussion

33.	Q. For 0.0128 N solution of acetic acid at 25^° equivalent conductance and limiting equivalent conductance of the solution is 1.4 S cm2 equiv-1 and 391 S cm2 equiv-1 respectively. The dissociation constant, Ka of acetic acid is (1) 2.3 x 10-7 (2) 1.6 x 10-7 (3) 1.4 x 10-6 (4) 4.6 x 10-5
Answer» Q. For 0.0128 N solution of acetic acid at 25^° equivalent conductance and limiting equivalent conductance of the solution is 1.4 S cm2 equiv-1 and 391 S cm2 equiv-1 respectively. The dissociation constant, Ka of acetic acid is (1) 2.3 x 10-7 (2) 1.6 x 10-7 (3) 1.4 x 10-6 (4) 4.6 x 10-5

Discussion

34.	54. If the atomic weight of carbon were set at 24 amu, the value of the Avogadro constant would be?
Answer» 54. If the atomic weight of carbon were set at 24 amu, the value of the Avogadro constant would be?

Discussion

35.	33.Pressure of 1 g ideal gas X at 300K is 2 atm. When 2 g of another gas Y is introduced in the same vessel at same temperature, the pressure become 3 atm then correct relationship between molar mass of X and Y is what?
Answer» 33.Pressure of 1 g ideal gas X at 300K is 2 atm. When 2 g of another gas Y is introduced in the same vessel at same temperature, the pressure become 3 atm then correct relationship between molar mass of X and Y is what?

Discussion

36.	Question 29 The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98×1024kg). which one of the two is heavier and by how many times?
Answer» Question 29 The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth $(5.98 \times 10^{24} k g)$ . which one of the two is heavier and by how many times?

Discussion

37.	Out of the following transition elements, which of the following does not exhibit variable oxidation state?
Answer» Out of the following transition elements, which of the following does not exhibit variable oxidation state?

Discussion

38.	The radius of an atomic nucleus is in the order of:
Answer» The radius of an atomic nucleus is in the order of:

Discussion

39.	What is value of specific charge on electron and proton respectively?
Answer» What is value of specific charge on electron and proton respectively?

Discussion

40.	An unknown sample weighing 1.5g was found to contain only Mn and S.The sample was completely reacted with oxygen and it produced 1.22g of Mn(\|\|)oxide and 1.38 g of SO3 what is the simplest formula for this compound.
Answer» An unknown sample weighing 1.5g was found to contain only Mn and S.The sample was completely reacted with oxygen and it produced 1.22g of Mn(\|\|)oxide and 1.38 g of SO3 what is the simplest formula for this compound.

Discussion

41.	Which of the following is correct about covalent compunds?
Answer» Which of the following is correct about covalent compunds?

Discussion

42.	30. While naming cyclic compounds for e.g. In cyclopropane 2 functional groups are attached to the respective sites i.e F.G-COOH & OH and in 3rd site Br is attached so what will be its naming?
Answer» 30. While naming cyclic compounds for e.g. In cyclopropane 2 functional groups are attached to the respective sites i.e F.G-COOH & OH and in 3rd site Br is attached so what will be its naming?

Discussion

43.	Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS] H2+Cl2→2HCl 2KClO3→2KCl+3O2 Zn+CuSO4→ZnSO4+Cu 2Pb(NO3)2→2PbO(s)+4NO2+O2 NaOH+HCl→NaCl+H2O
Answer» Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS] $H_{2} + {Cl}_{2} \to 2 HCl$ $2 {KClO}_{3} \to 2 KCl + 3 O_{2}$ $Zn + {CuSO}_{4} \to {ZnSO}_{4} + Cu$ $2 {Pb(NO}_{3})_{2} \to 2 PbO(s) + 4 {NO}_{2} + O_{2}$ $NaOH + HCl \to NaCl + H_{2} O$

43.

Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS] H2+Cl2→2HCl 2KClO3→2KCl+3O2 Zn+CuSO4→ZnSO4+Cu 2Pb(NO3)2→2PbO(s)+4NO2+O2 NaOH+HCl→NaCl+H2O

Answer»

Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS]

$H_{2} + {Cl}_{2} \to 2 HCl$
$2 {KClO}_{3} \to 2 KCl + 3 O_{2}$
$Zn + {CuSO}_{4} \to {ZnSO}_{4} + Cu$
$2 {Pb(NO}_{3})_{2} \to 2 PbO(s) + 4 {NO}_{2} + O_{2}$
$NaOH + HCl \to NaCl + H_{2} O$

Discussion

44.	Which of the following shells can have maximum of 2 electrons?
Answer» Which of the following shells can have maximum of 2 electrons?

Discussion

45.	Which of the following is/are the effect(s) of ozone layer depletion?
Answer» Which of the following is/are the effect(s) of ozone layer depletion?

Discussion

46.	What is an emulsion? Give examples.
Answer» What is an emulsion? Give examples.

Discussion

47.	Nucleus model of the atom was proposed by:
Answer» Nucleus model of the atom was proposed by:

Discussion

48.	26 A gaseOus mixture contains twice the moles ofCH as compared to the moles of H The moleraction of H, in the gas miture is(2)223
Answer» 26 A gaseOus mixture contains twice the moles ofCH as compared to the moles of H The moleraction of H, in the gas miture is(2)223

Discussion

49.	1% solution of Iodoform is used as-
Answer» 1% solution of Iodoform is used as-

Discussion

50.	What do you understand by Atomic number and Mass number?
Answer» What do you understand by Atomic number and Mass number?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The equivlent weight of an element is 4. Its chloride has a vapour density 59.25. The formula of its oxide will be (1) M_2O_3 (2) MO (3) M_3O_4 (4) MO_2

CH3CHO and CH3COCH3 can not be distinguished by : (1) Fehling solution (2) Grignard reagent (3) Schiff's reagent (4) Tollen's reagent (Explain about each option to clear concept)

Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements. ​

When calculating reaction quotient do we convert the partial pressure given in atm into Pascal?

Mole fraction of ethanol and water mixture is 0.25 . Hence percentage concentration of ethanol by weight of mixture is........

What is a combination reaction?

74.Arrange ortho hydroxybenzoic acid (1), meta hydroxybenzoic acid (2),para hydroxybenzoic acid (3), benzoic acid (4)in order of decreasing acid strength.

Cutting of wood is a physical change, Explain why? The burning of wood is a chemical change, Explain why?

Question 27The difference in the mass of 100 moles each of sodium atoms and sodium ions is 5.48002 g.Compute the mass of an electron.

Give one major drawback of Dalton's atomic theory of matter. Dalton's atomic theory says that atoms are indivisible. Is this statement still valid? Give reasons for your answer.

Question 3.1 Identify the substance that is oxidized and the substance that is reduced in the following reaction: 4Na (s)+O2(g)→2Na2O(s)

During the practical in the lab when hydrogen sulphide gas having offensive odour is prepared for some test, we can smell hte gas even 50 metres away. Explain hte phenomenon.

the physical quantities of dimensions of lenght that can be formed out of c,g and e2/4piee0 is??

why Hydrogen is not included in s, p, d ,f blocks in the periodic table?

Statements: N J, J % R, R © H Conclusions: a) R # N b) N © H

Why is there a difference in sound when dropping a metal coin vs a lump of coal?

Explain the following terms with one example each.(a) Corrosion(b) Rancidity

Clouds are ___ collections of tiny water droplets and crystallized water molecules.

Why only helium is filled in balloons?? Hydrogen and nitrogen are also light in weight.then why we don't use these gases??

Af U of formation of CH4 (g) at certain temperature is 393 kJ mol1. The value of A, H is(b) < A, Ue(d) equal to A, Uo(a) zero()> A†extcent U†extcopyright

What is the meaning of electropositivity and electronegativity?

Give scientific reasons:(a) An atom is electrically neutral though it contains charged particles.(b) Two electrons in Helium are placed in only one shell while three electrons in Lithium occupy two shells.

Which of the following is/are not compressible?

Write the steps you would use for preparing lemonade. Use the words solution, solvent, solute, dissolve, soluble, insoluble, filtrate, and residue.

Question 5 (a) What is the physical state of water at— (a)25∘C

Which bond is formed by the sharing of electrons?

36. An electron makes 5 crests during one revolution round H nucleus . The electron belongs from which orbit and why?

Hello sir ..!! Greetings Happy teachers day Sir!! Sir .when I read the theory in chemistry there is not much questions asked in it Is there any book for chemistry that has questions to work out to test my knowledge You can suggest me 2 or more books sir Thanking you

Why should a cation like Na+ should act as a Lewis acid and tend to accept an electron although it has already attained stability by having a Nobel gas configuration?

Which part of an atom was discovered by Rutherford?

What is the chemical formula for aluminium oxide?

Q. For 0.0128 N solution of acetic acid at 25^° equivalent conductance and limiting equivalent conductance of the solution is 1.4 S cm2 equiv-1 and 391 S cm2 equiv-1 respectively. The dissociation constant, Ka of acetic acid is (1) 2.3 x 10-7 (2) 1.6 x 10-7 (3) 1.4 x 10-6 (4) 4.6 x 10-5

54. If the atomic weight of carbon were set at 24 amu, the value of the Avogadro constant would be?

33.Pressure of 1 g ideal gas X at 300K is 2 atm. When 2 g of another gas Y is introduced in the same vessel at same temperature, the pressure become 3 atm then correct relationship between molar mass of X and Y is what?

Question 29 The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98×1024kg). which one of the two is heavier and by how many times?

Out of the following transition elements, which of the following does not exhibit variable oxidation state?

The radius of an atomic nucleus is in the order of:

What is value of specific charge on electron and proton respectively?

An unknown sample weighing 1.5g was found to contain only Mn and S.The sample was completely reacted with oxygen and it produced 1.22g of Mn(||)oxide and 1.38 g of SO3 what is the simplest formula for this compound.

Which of the following is correct about covalent compunds?

30. While naming cyclic compounds for e.g. In cyclopropane 2 functional groups are attached to the respective sites i.e F.G-COOH & OH and in 3rd site Br is attached so what will be its naming?

Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS] H2+Cl2→2HCl 2KClO3→2KCl+3O2 Zn+CuSO4→ZnSO4+Cu 2Pb(NO3)2→2PbO(s)+4NO2+O2 NaOH+HCl→NaCl+H2O

Which of the following shells can have maximum of 2 electrons?

Which of the following is/are the effect(s) of ozone layer depletion?

What is an emulsion? Give examples.

Nucleus model of the atom was proposed by:

26 A gaseOus mixture contains twice the moles ofCH as compared to the moles of H The moleraction of H, in the gas miture is(2)223

1% solution of Iodoform is used as-

What do you understand by Atomic number and Mass number?

Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.