10223 + Interview Questions in Chemistry

1.	1.52 g of a hydroxide of a metal ,on ignition gave 0.99 g oxide of the metal. What will be the equivalent weight of the metal?? A. 1.52 g B. 0.995 g C. 190 g D. 10 g
Answer» 1.52 g of a hydroxide of a metal ,on ignition gave 0.99 g oxide of the metal. What will be the equivalent weight of the metal?? A. 1.52 g B. 0.995 g C. 190 g D. 10 g

Discussion

2.	In the ground state an element has 13 electrons in its M shell. Which element is it??
Answer» In the ground state an element has 13 electrons in its M shell. Which element is it??

Discussion

3.	Concentration of solution= Amount of solute/Amount of solution Or Amount of solute/Amount of solvent Are these both formula same.Can you send me some questions based on these formulas.
Answer» Concentration of solution= Amount of solute/Amount of solution Or Amount of solute/Amount of solvent Are these both formula same.Can you send me some questions based on these formulas.

3.

Concentration of solution= Amount of solute/Amount of solution Or Amount of solute/Amount of solvent Are these both formula same.Can you send me some questions based on these formulas.

Answer»

Concentration of solution=

Amount of solute/Amount of solution

Or

Amount of solute/Amount of solvent

Are these both formula same.Can you send me some questions based on these formulas.

Discussion

4.	Centre of mass of disc in which one small peice of disc is taken out.
Answer» Centre of mass of disc in which one small peice of disc is taken out.

Discussion

5.	D block electronic configurationn-1 why there is n-1
Answer» D block electronic configuration n-1 why there is n-1

Discussion

6.	On the basis of composition of matter, milk is considered to be : (a) a pure substance (b) an impure substance (c) an element (d) a compound
Answer» On the basis of composition of matter, milk is considered to be : (a) a pure substance (b) an impure substance (c) an element (d) a compound

6.

On the basis of composition of matter, milk is considered to be : (a) a pure substance (b) an impure substance (c) an element (d) a compound

Answer»

On the basis of composition of matter, milk is considered to be :

(a) a pure substance (b) an impure substance (c) an element (d) a compound

Discussion

7.	Lead nitrate on heating (Decomposition) gives
Answer» Lead nitrate on heating (Decomposition) gives

Discussion

8.	(a) Explain why diamond has a high melting point.(b) State any two uses of diamond.
Answer» (a) Explain why diamond has a high melting point. (b) State any two uses of diamond.

Discussion

9.	Convert ethanol into but-1-yne? and explain the reaction.
Answer» Convert ethanol into but-1-yne? and explain the reaction.

Discussion

10.	The element of one short period of the Periodic Table are given below in order from left to right:Li Be B C O F Ne(i) To which period do these elements belong?(ii) One element of this period is missing. Which is the missing element and where should it be placed?(iii) Which one of the elements in this period shows the property of catenation?(iv) Place the three elements fluorine, beryllium and nitrogen in the order of increasing electronegativity.(v) Which one of the above elements belongs to the halogen series?
Answer» The element of one short period of the Periodic Table are given below in order from left to right: Li Be B C O F Ne (i) To which period do these elements belong? (ii) One element of this period is missing. Which is the missing element and where should it be placed? (iii) Which one of the elements in this period shows the property of catenation? (iv) Place the three elements fluorine, beryllium and nitrogen in the order of increasing electronegativity. (v) Which one of the above elements belongs to the halogen series?

Discussion

11.	Ammonia reacts with sulphuric acid to give the fertilizer ammonium sulphate.Calculate the volume of ammonia at Standard Temperature Pressure to form 30g of ammonium sulpahte.
Answer» Ammonia reacts with sulphuric acid to give the fertilizer ammonium sulphate.Calculate the volume of ammonia at Standard Temperature Pressure to form 30g of ammonium sulpahte.

Discussion

12.	2. Standard haet of vapourisation Delta vap H(0) water at 100 C is 40.66 KJPER Mole. The internal energy change of vapourisation of water at 100 C ( in KJ Per Mole ) is
Answer» 2. Standard haet of vapourisation Delta vap H(0) water at 100 C is 40.66 KJPER Mole. The internal energy change of vapourisation of water at 100 C ( in KJ Per Mole ) is

Discussion

13.	Which among these are limitations of Mendeleev's periodic table?
Answer» Which among these are limitations of Mendeleev's periodic table?

Discussion

14.	what are quarks and gluons ? what the do inside the nucleus ?
Answer» what are quarks and gluons ? what the do inside the nucleus ?

Discussion

15.	Write the word equation involved in the displacement reaction of copper sulphate and zinc.
Answer» Write the word equation involved in the displacement reaction of copper sulphate and zinc.

Discussion

16.	The valency of an element A is 3 and that of element B is 2. Write the formula of the compound formed by the combination of A and B.
Answer» The valency of an element A is 3 and that of element B is 2. Write the formula of the compound formed by the combination of A and B.

Discussion

17.	According to the law of conservation of mass, what would be the number of H2 molecule in N2+H2→NH3 ?
Answer» According to the law of conservation of mass, what would be the number of $H_{2}$ molecule in $N_{2} + H_{2} \to N H_{3}$ ?

Discussion

18.	What Is pilus which is involved in conjugation.
Answer» What Is pilus which is involved in conjugation.

Discussion

19.	How to convert ethanol to butane?
Answer» How to convert ethanol to butane?

Discussion

20.	What is the charge of valency of carbon and silicon. Is it +4 or -4? Both have 4 electrons in its outermost shell. Will it gain electrons or lose electrons to complete the octet?
Answer» What is the charge of valency of carbon and silicon. Is it +4 or -4? Both have 4 electrons in its outermost shell. Will it gain electrons or lose electrons to complete the octet?

Discussion

21.	6. If 150 ml of 0.03M ammonium sulphate solution is added to 300ml of water,find the molarity of ammonium ions in the solution
Answer» 6. If 150 ml of 0.03M ammonium sulphate solution is added to 300ml of water,find the molarity of ammonium ions in the solution

Discussion

22.	Percentage of calcium in calcium nitrate is:
Answer» Percentage of calcium in calcium nitrate is:

Discussion

23.	66. Equal moles of hydrogen and nitrogen which is limiting reagent
Answer» 66. Equal moles of hydrogen and nitrogen which is limiting reagent

Discussion

24.	State two examples each for carbon in free state as well as in combined state.
Answer» State two examples each for carbon in free state as well as in combined state.

Discussion

25.	The density of a gas is 0.002 g/mL at STP. Its molar mass is:
Answer» The density of a gas is $0.002 g/mL$ at STP. Its molar mass is:

Discussion

26.	Arrange the following in increasing order of acidity (1)benzoic acid(2) para methoxy benzoic acid (3) o-methoxybenzoic acid
Answer» Arrange the following in increasing order of acidity (1)benzoic acid(2) para methoxy benzoic acid (3) o-methoxybenzoic acid

Discussion

27.	Gram equivalents = no. of moles * n.factor.What is the meaning of n.factor ? and what is the n.factor of hydrogen molecule ?
Answer» Gram equivalents = no. of moles * n.factor. What is the meaning of n.factor ? and what is the n.factor of hydrogen molecule ?

Discussion

28.	In organic chemistry and in iso and neo carbon chain iso and neo carbon chain are possible up to Iso(3-6) Neo(5-7)only. Why?
Answer» In organic chemistry and in iso and neo carbon chain iso and neo carbon chain are possible up to Iso(3-6) Neo(5-7)only. Why?

Discussion

29.	2.76 g of silver carbonate on being strongly heated yeilds a residue weighing
Answer» 2.76 g of silver carbonate on being strongly heated yeilds a residue weighing

Discussion

30.	A particle M has 18 electrons, 20 neutrons and 19 protons. This particle must be a:
Answer» A particle M has 18 electrons, 20 neutrons and 19 protons. This particle must be a:

Discussion

31.	Between pH value of 7 to 14, As pH increases:
Answer» Between pH value of 7 to 14, As pH increases:

Discussion

32.	What happens to the rate of evaporation when salt is added to the water?
Answer» What happens to the rate of evaporation when salt is added to the water?

Discussion

33.	One day you were boiling water for making tea, you observed that at a certain point, the temperature of the solution became constant. Identify a correct reason.
Answer» One day you were boiling water for making tea, you observed that at a certain point, the temperature of the solution became constant. Identify a correct reason.

Discussion

34.	What is divalent and covalent compounds?
Answer» What is divalent and covalent compounds?

Discussion

35.	A piece of chalk can be broken into small particles by hammering but a piece of iron cannot be broken itno small particles by hammering.Which characterstic of matter is illustrated by these observations ?
Answer» A piece of chalk can be broken into small particles by hammering but a piece of iron cannot be broken itno small particles by hammering.Which characterstic of matter is illustrated by these observations ?

Discussion

36.	State whether the following statement is true or false: The symbol of element cobalt is CO.
Answer» State whether the following statement is true or false: The symbol of element cobalt is CO.

36.

State whether the following statement is true or false: The symbol of element cobalt is CO.

Answer»

State whether the following statement is true or false:

The symbol of element cobalt is CO.

Discussion

37.	A sample containing 85 g of NH3 is decomposed into nitrogen and hydrogen. The total amount of nitrogen and hydrogen present in 85 g of the sample respectively are:
Answer» A sample containing 85 g of NH₃ is decomposed into nitrogen and hydrogen. The total amount of nitrogen and hydrogen present in 85 g of the sample respectively are:

Discussion

38.	(a) What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids. (b) Classify the following into metals, non-metals and metalloids : Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium.
Answer» (a) What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids. (b) Classify the following into metals, non-metals and metalloids : Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium.

38.

(a) What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids. (b) Classify the following into metals, non-metals and metalloids : Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium.

Answer»

(a) What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.

(b) Classify the following into metals, non-metals and metalloids :

Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium.

Discussion

39.	2500cm3 of hydrogen is taken at S.T.P. The pressure of this gas is further increased by two and a half times (temperature remaining constant). What volume will hydrogen occupy now?
Answer» $2500 c m^{3}$ of hydrogen is taken at S.T.P. The pressure of this gas is further increased by two and a half times (temperature remaining constant). What volume will hydrogen occupy now?

Discussion

40.	Which of the air pressures is appropriate for the production of cathode rays in the discharge tube?
Answer» Which of the air pressures is appropriate for the production of cathode rays in the discharge tube?

Discussion

41.	Question 9 Two chemical species X and Y combine together to form a product P which contains both X and Y, X+Y→P, X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct? (i) P is a compound (ii) X and Y are compounds (iii) X and Y are elements (iv) P has a fixed composition (a) (i), (ii) and (iii) (b) (i), (ii) and (iv) (c) (ii), (iii) and (iv) (d) (i), (iii) and (iv)
Answer» Question 9 Two chemical species X and Y combine together to form a product P which contains both X and Y, $X + Y \to P$ , X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct? (i) P is a compound (ii) X and Y are compounds (iii) X and Y are elements (iv) P has a fixed composition (a) (i), (ii) and (iii) (b) (i), (ii) and (iv) (c) (ii), (iii) and (iv) (d) (i), (iii) and (iv)

Discussion

42.	What are the two things which doesn't contain chemistry?
Answer» What are the two things which doesn't contain chemistry?

Discussion

43.	9. If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 kcal/mol respectively, then the electronegativity of the element on the Pauling scale is
Answer» 9. If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 kcal/mol respectively, then the electronegativity of the element on the Pauling scale is

Discussion

44.	What is the chemical formula of calcium phosphate?
Answer» What is the chemical formula of calcium phosphate?

Discussion

45.	The colour of ink added to water remains visible even after multiple dilutions. Why?
Answer» The colour of ink added to water remains visible even after multiple dilutions. Why?

Discussion

46.	The size of carbon nano tube is 25×10−9 m and the size of bacterial cell is 5 μm. Find the ratio of size of bacterial cell to carbon nano tube.[Given 1 μm=10−6m]
Answer» The size of carbon nano tube is $25 \times 10^{- 9} m$ and the size of bacterial cell is $5 μ m$ . Find the ratio of size of bacterial cell to carbon nano tube. [Given $1 μ m = 10^{- 6} m$ ]

Discussion

47.	a +ve charged oxygen atom and a+ve charge hydrogen atom placed in magnetic field which atom will be deflected more?
Answer» a +ve charged oxygen atom and a+ve charge hydrogen atom placed in magnetic field which atom will be deflected more?

Discussion

48.	Identify solute and solvent in the following solutions :(i) Aerated drinks(ii) Tincture of iodine(iii) Lemon waterState the principle of each of the following methods of separation of mixtures.(i) Centrifugation method(ii) Separation using separating funnel
Answer» Identify solute and solvent in the following solutions : (i) Aerated drinks (ii) Tincture of iodine (iii) Lemon water State the principle of each of the following methods of separation of mixtures. (i) Centrifugation method (ii) Separation using separating funnel

Discussion

49.	The percentage of carbon in a molecule of carbon monoxide is
Answer» The percentage of carbon in a molecule of carbon monoxide is

Discussion

50.	37.Which has higher negative electron gain enthalpy and why? i)Br,Cl ii)F,Cl iii)O,S
Answer» 37.Which has higher negative electron gain enthalpy and why? i)Br,Cl ii)F,Cl iii)O,S

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

1.52 g of a hydroxide of a metal ,on ignition gave 0.99 g oxide of the metal. What will be the equivalent weight of the metal?? A. 1.52 g B. 0.995 g C. 190 g D. 10 g

In the ground state an element has 13 electrons in its M shell. Which element is it??

Concentration of solution= Amount of solute/Amount of solution Or Amount of solute/Amount of solvent Are these both formula same.Can you send me some questions based on these formulas.

Centre of mass of disc in which one small peice of disc is taken out.

D block electronic configurationn-1 why there is n-1

On the basis of composition of matter, milk is considered to be : (a) a pure substance (b) an impure substance (c) an element (d) a compound

Lead nitrate on heating (Decomposition) gives

(a) Explain why diamond has a high melting point.(b) State any two uses of diamond.

Convert ethanol into but-1-yne? and explain the reaction.

Ammonia reacts with sulphuric acid to give the fertilizer ammonium sulphate.Calculate the volume of ammonia at Standard Temperature Pressure to form 30g of ammonium sulpahte.

2. Standard haet of vapourisation Delta vap H(0) water at 100 C is 40.66 KJPER Mole. The internal energy change of vapourisation of water at 100 C ( in KJ Per Mole ) is

Which among these are limitations of Mendeleev's periodic table?

what are quarks and gluons ? what the do inside the nucleus ?

Write the word equation involved in the displacement reaction of copper sulphate and zinc.

The valency of an element A is 3 and that of element B is 2. Write the formula of the compound formed by the combination of A and B.

According to the law of conservation of mass, what would be the number of H2 molecule in N2+H2→NH3 ?

What Is pilus which is involved in conjugation.

How to convert ethanol to butane?

What is the charge of valency of carbon and silicon. Is it +4 or -4? Both have 4 electrons in its outermost shell. Will it gain electrons or lose electrons to complete the octet?

6. If 150 ml of 0.03M ammonium sulphate solution is added to 300ml of water,find the molarity of ammonium ions in the solution

Percentage of calcium in calcium nitrate is:

66. Equal moles of hydrogen and nitrogen which is limiting reagent

State two examples each for carbon in free state as well as in combined state.

The density of a gas is 0.002 g/mL at STP. Its molar mass is:

Arrange the following in increasing order of acidity (1)benzoic acid(2) para methoxy benzoic acid (3) o-methoxybenzoic acid

Gram equivalents = no. of moles * n.factor.What is the meaning of n.factor ? and what is the n.factor of hydrogen molecule ?

In organic chemistry and in iso and neo carbon chain iso and neo carbon chain are possible up to Iso(3-6) Neo(5-7)only. Why?

2.76 g of silver carbonate on being strongly heated yeilds a residue weighing

A particle M has 18 electrons, 20 neutrons and 19 protons. This particle must be a:

Between pH value of 7 to 14, As pH increases:

What happens to the rate of evaporation when salt is added to the water?

One day you were boiling water for making tea, you observed that at a certain point, the temperature of the solution became constant. Identify a correct reason.

What is divalent and covalent compounds?

A piece of chalk can be broken into small particles by hammering but a piece of iron cannot be broken itno small particles by hammering.Which characterstic of matter is illustrated by these observations ?

State whether the following statement is true or false: The symbol of element cobalt is CO.

A sample containing 85 g of NH3 is decomposed into nitrogen and hydrogen. The total amount of nitrogen and hydrogen present in 85 g of the sample respectively are:

(a) What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids. (b) Classify the following into metals, non-metals and metalloids : Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium.

2500cm3 of hydrogen is taken at S.T.P. The pressure of this gas is further increased by two and a half times (temperature remaining constant). What volume will hydrogen occupy now?

Which of the air pressures is appropriate for the production of cathode rays in the discharge tube?

What are the two things which doesn't contain chemistry?

9. If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 kcal/mol respectively, then the electronegativity of the element on the Pauling scale is

What is the chemical formula of calcium phosphate?

The colour of ink added to water remains visible even after multiple dilutions. Why?

The size of carbon nano tube is 25×10−9 m and the size of bacterial cell is 5 μm. Find the ratio of size of bacterial cell to carbon nano tube.[Given 1 μm=10−6m]

a +ve charged oxygen atom and a+ve charge hydrogen atom placed in magnetic field which atom will be deflected more?

Identify solute and solvent in the following solutions :(i) Aerated drinks(ii) Tincture of iodine(iii) Lemon waterState the principle of each of the following methods of separation of mixtures.(i) Centrifugation method(ii) Separation using separating funnel

The percentage of carbon in a molecule of carbon monoxide is

37.Which has higher negative electron gain enthalpy and why? i)Br,Cl ii)F,Cl iii)O,S