10223 + Interview Questions in Chemistry Page 111 InterviewSolution

5501.	Match the reactions with the reaction types: I. 3CuS+8HNO3→3CuSO4+8NO(g)+4H2OA. Combination reactionII. NH3+HCl→NH4ClB. Displacement reactionIII. Br2+2KI→2KBr+I2C. Double displacement reactionIV. Na2S+2HCl→2NaCl+H2SD. Oxidation−reduction reaction
Answer» Match the reactions with the reaction types: $\begin{matrix} I . 3 C u S + 8 H N O_{3} \to 3 C u S O_{4} + 8 N O (g) + 4 H_{2} O & A . C o m b i n a t i o n r e a c t i o n I I . N H_{3} + H C l \to N H_{4} C l & B . D i s p l a c e m e n t r e a c t i o n I I I . B r_{2} + 2 K I \to 2 K B r + I_{2} & C . D o u b l e d i s p l a c e m e n t r e a c t i o n I V . N a_{2} S + 2 H C l \to 2 N a C l + H_{2} S & D . O x i d a t i o n - r e d u c t i o n r e a c t i o n \end{matrix}$

Discussion

5502.	what is the concentration of NO_3^- ions when equal volumes of 0.1 M AgNO_3 and 0.1 M NaCl are mixed togethe
Answer» what is the concentration of NO_3^- ions when equal volumes of 0.1 M AgNO_3 and 0.1 M NaCl are mixed togethe

Discussion

5503.	The reaction of ethanol with ethanoic acid in presence of concentrated H2SO4, produces _____.
Answer» The reaction of ethanol with ethanoic acid in presence of concentrated $H_{2} S O_{4}$ , produces _____.

Discussion

5504.	Two liquids A and B form an ideal solution, A 1: 1 mixture (by mole) boils at 80oC. At this temperature pure A has a vapour pressure of 560 mm Hg. The vapour pressure of pure B at this temperature will be: (a) 200 mm Hg (b) 760 mm Hg (c) 860 mm Hg (d) 960 mm Hg
Answer» Two liquids A and B form an ideal solution, A 1: 1 mixture (by mole) boils at 80oC. At this temperature pure A has a vapour pressure of 560 mm Hg. The vapour pressure of pure B at this temperature will be: (a) 200 mm Hg (b) 760 mm Hg (c) 860 mm Hg (d) 960 mm Hg

Discussion

5505.	In the structure of ozone there are 3 oxygen atoms . In that 1 oxygen atom get (-)charge why? if it is forming the covalent bond and electronegativity is same for both oxyge
Answer» In the structure of ozone there are 3 oxygen atoms . In that 1 oxygen atom get (-)charge why? if it is forming the covalent bond and electronegativity is same for both oxyge

Discussion

5506.	Who was the scientist credited with devising the first periodic table similar to one we use today?
Answer» Who was the scientist credited with devising the first periodic table similar to one we use today?

Discussion

5507.	Why is particularly centrifugation machine is used in separation of collides
Answer» Why is particularly centrifugation machine is used in separation of collides

Discussion

5508.

With whom should I pair up? Group 'A' Group 'B' (1) Air (a) Excretion (2) Water (b) Scattering of light (3) Soil (c) Plasticity

Answer» With whom should I pair up?

Group 'A'		Group 'B'
(1)	Air	(a)	Excretion
(2)	Water	(b)	Scattering of light
(3)	Soil	(c)	Plasticity

Discussion

5509.	34. 1.45 litres of a gas is collected over Water at 27 degree Celsius and 744 mm of Hg ,if the gas weights 1.98 grams and vapour pressure of water at 27 degree celsius is 32 mm what is the molecular weight of the gas
Answer» 34. 1.45 litres of a gas is collected over Water at 27 degree Celsius and 744 mm of Hg ,if the gas weights 1.98 grams and vapour pressure of water at 27 degree celsius is 32 mm what is the molecular weight of the gas

Discussion

5510.	Question 27 What information do you get from the figure about the atomic number, mass number and valency of atoms X, Y and Z? Give your answer in a tabular form.
Answer» Question 27 What information do you get from the figure about the atomic number, mass number and valency of atoms X, Y and Z? Give your answer in a tabular form.

Discussion

5511.	27.The rate of diffusion of a gas having molecular weight just double of hydrogen gas is 30ml/s. The rate of diffusion of hydrogen gas will be (1) 42.42ml/s (2) 60ml/s (3) 120ml/s (4) 21.21ml/s
Answer» 27.The rate of diffusion of a gas having molecular weight just double of hydrogen gas is 30ml/s. The rate of diffusion of hydrogen gas will be (1) 42.42ml/s (2) 60ml/s (3) 120ml/s (4) 21.21ml/s

Discussion

5512.	which of the following is least towards S_N2 mechanism?(a) chloro-cyclopen†an e (b)3-chloropropene (c)chloro-cyclopropane (d) chloromethyl - cyclopropan
Answer» which of the following is least towards S_N2 mechanism?(a) chloro-cyclopen†an e (b)3-chloropropene (c)chloro-cyclopropane (d) chloromethyl - cyclopropan

Discussion

5513.	The mass of one steel screw is 4.11 g. Find the mass of one mole of these steel screws.
Answer» The mass of one steel screw is 4.11 g. Find the mass of one mole of these steel screws.

Discussion

5514.	Question 10:How is evaporation different from boiling?
Answer» Question 10: How is evaporation different from boiling?

5514.

Question 10:How is evaporation different from boiling?

Answer»

Question 10:

How is evaporation different from boiling?

Discussion

5515.	If one mole of H2 gas is occupies a rigid container with a capacity of 1000 litres and the temperature is raised from 27oC to 37oC, the change in pressure of the contained gas (round off to two decimal places), assuming ideal gas behaviour, is Pa(R=8.314J/mol−K) 83.14
Answer» If one mole of $H_{2}$ gas is occupies a rigid container with a capacity of $1000$ litres and the temperature is raised from $27^{o} C$ to $37^{o} C$ , the change in pressure of the contained gas (round off to two decimal places), assuming ideal gas behaviour, is $P a$ $(R = 8.314 J / m o l - K)$ 83.14

Discussion

5516.	Hydrogen and oxygen combined in the ratio of 1:8by mass to form water what mass of oxygen gas would be required to react completely with 3gram of hydrogen gas
Answer» Hydrogen and oxygen combined in the ratio of 1:8by mass to form water what mass of oxygen gas would be required to react completely with 3gram of hydrogen gas

Discussion

5517.	A solution is made by dissolving 50 g of glucose in 250 g of water . Calculate the concentration of this solution in mass percentage
Answer» A solution is made by dissolving 50 g of glucose in 250 g of water . Calculate the concentration of this solution in mass percentage

Discussion

5518.	How many pentagons and hexagons are present in one molecule of fullerene C60?
Answer» How many pentagons and hexagons are present in one molecule of fullerene $C_{60}$ ?

Discussion

5519.	Whare are the two types of pure substances ? Give one example of each type.
Answer» Whare are the two types of pure substances ? Give one example of each type.

Discussion

5520.	Sponge is a solid yet we are able to compress it. Why?
Answer» Sponge is a solid yet we are able to compress it. Why?

Discussion

5521.	In the chemical formula of a diatomic ionic compound, the valency of the anion is three. What will be the valency of cation?3
Answer» In the chemical formula of a diatomic ionic compound, the valency of the anion is three. What will be the valency of cation? 3

Discussion

5522.	Calculate the mass of an atom of atomic mass 260amu.
Answer» Calculate the mass of an atom of atomic mass 260amu.

Discussion

5523.	Which of the following is correct about fire?Fire is ____________.
Answer» Which of the following is correct about fire? Fire is ____________.

5523.

Which of the following is correct about fire?Fire is ____________.

Answer»

Which of the following is correct about fire?

Fire is ____________.

Discussion

5524.	Can photons be considered as neutrons because they are electrically neutral and not deflected by magnetic or electric field
Answer» Can photons be considered as neutrons because they are electrically neutral and not deflected by magnetic or electric field

Discussion

5525.	12. When dil. ferrous sulphate solution reacts with potassium permanganate solution then the purple colour of the solution fades. What is the reason behind this?
Answer» 12. When dil. ferrous sulphate solution reacts with potassium permanganate solution then the purple colour of the solution fades. What is the reason behind this?

Discussion

5526.	How is the size of a degree on Celsius scale related to the size of a degree on Kelvin scale?
Answer» How is the size of a degree on Celsius scale related to the size of a degree on Kelvin scale?

Discussion

5527.	how many Schottky defects are there in 10 raise to 24 atoms
Answer» how many Schottky defects are there in 10 raise to 24 atoms

Discussion

5528.	Question 6A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears.Which of the following is the correct explanation for the observation?(a) KMnO4 is an oxidizing agent, it oxidises FeSO4.(b) FeSO4 acts as an oxidizing agent and oxidises KMnO4.(c) The colour disappears due to dilution; no reaction is involved.(d) KMnO4 is an unstable compound and decomposes in presence of FeSO4 to a colourless compound.
Answer» Question 6 A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation? (a) ${KMnO}_{4}$ is an oxidizing agent, it oxidises ${FeSO}_{4}$ . (b) ${FeSO}_{4}$ acts as an oxidizing agent and oxidises ${KMnO}_{4}$ . (c) The colour disappears due to dilution; no reaction is involved. (d) ${KMnO}_{4}$ is an unstable compound and decomposes in presence of ${FeSO}_{4}$ to a colourless compound.

Discussion

5529.	Is Fe2O3 basic or acidic in nature ?
Answer» Is $F e_{2} O_{3}$ basic or acidic in nature ?

Discussion

5530.	In a solution of pH = 5 more acid is added in order to reduce the pH to 3. Increase in hydrogen ion concentration is Options: Should have
Answer» In a solution of pH = 5 more acid is added in order to reduce the pH to 3. Increase in hydrogen ion concentration is Options: Should have

Discussion

5531.	Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
Answer» Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.

Discussion

5532.	Question 18 Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order. (i) Rutherford's atomic model (ii) Thomson's atomic model (iii) Bohr's atomic model (a) (i), (ii) and (iii) (b) (ii), (iii) and (i) (c) (ii), (i) and (iii) (d) (iii), (ii) and (i)
Answer» Question 18 Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order. (i) Rutherford's atomic model (ii) Thomson's atomic model (iii) Bohr's atomic model (a) (i), (ii) and (iii) (b) (ii), (iii) and (i) (c) (ii), (i) and (iii) (d) (iii), (ii) and (i)

Discussion

5533.	Each of the stationary orbits are associated with:
Answer» Each of the stationary orbits are associated with:

Discussion

5534.	under what conditions do noble gas elements form compound?
Answer» under what conditions do noble gas elements form compound?

Discussion

5535.	Question 48.Identify the compound X on the basis of the reactions given below. Also, write the name and chemical formulae of A, B and C.
Answer» Question 48. Identify the compound X on the basis of the reactions given below. Also, write the name and chemical formulae of A, B and C.

Discussion

5536.	Iron oxide has formula Fe0.94O. The fraction of Fe exists as Fe+3 is
Answer» Iron oxide has formula $F e_{0.94} O .$ The fraction of $F e$ exists as $F e^{+ 3}$ is

Discussion

5537.	Which of the following method(s) is/are used in preparing a base?
Answer» Which of the following method(s) is/are used in preparing a base?

Discussion

5538.	ratio of radius of H atom H+ ion.
Answer» ratio of radius of H atom H+ ion.

Discussion

5539.	Identify the Mg2+ ion from the figure where, n and p represent the number of neutrons and protons respectively.
Answer» Identify the $M g^{2 +}$ ion from the figure where, n and p represent the number of neutrons and protons respectively.

Discussion

5540.	why an electron can't goes into nucleus in stable elements
Answer» why an electron can't goes into nucleus in stable elements

Discussion

5541.	Justify the position of Hydrogen in the periodic table.
Answer» Justify the position of Hydrogen in the periodic table.

Discussion

5542.	The third member of the family of alkenynes has the molecular formula.
Answer» The third member of the family of alkenynes has the molecular formula.

Discussion

5543.	Does Noble Gas Exhibits Chemical Reactivity? If yes, then why?
Answer» Does Noble Gas Exhibits Chemical Reactivity? If yes, then why?

Discussion

5544.	Question 20 Name the process associated with the following (a) Dry ice is kept at room temperature and at one atmospheric pressure. (b) A drop of ink placed on the surface of water contained in a glass spreads throughout the water. (c) A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring. (d) An acetone bottle is left open and the bottle becomes empty. (e) Milk is churned to separate cream from it. (f) Settling of sand when a mixture of sand and water is left undisturbed for some time. (g) A fine beam of light entering through a small hole in a dark room. Illuminates the particles in its paths.
Answer» Question 20 Name the process associated with the following (a) Dry ice is kept at room temperature and at one atmospheric pressure. (b) A drop of ink placed on the surface of water contained in a glass spreads throughout the water. (c) A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring. (d) An acetone bottle is left open and the bottle becomes empty. (e) Milk is churned to separate cream from it. (f) Settling of sand when a mixture of sand and water is left undisturbed for some time. (g) A fine beam of light entering through a small hole in a dark room. Illuminates the particles in its paths.

Discussion

5545.	In what respects do the three isotopes of hydrogen differ ?
Answer» In what respects do the three isotopes of hydrogen differ ?

Discussion

5546.	What is the reducing agent & oxidising agent in the reaction of Zinc Metal with Copper Sulphate ?
Answer» What is the reducing agent & oxidising agent in the reaction of Zinc Metal with Copper Sulphate ?

Discussion

5547.	A solution reacts with crushed egg shells to give a gas that turns like water milky.Then what does that solution contain?
Answer» A solution reacts with crushed egg shells to give a gas that turns like water milky.Then what does that solution contain?

Discussion

5548.	Which of the following are also considerd to be the states of matter? (i) Plasma (ii) Platelets (iii) BEC (iv) BHC (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)
Answer» Which of the following are also considerd to be the states of matter? (i) Plasma (ii) Platelets (iii) BEC (iv) BHC (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)

5548.

Which of the following are also considerd to be the states of matter? (i) Plasma (ii) Platelets (iii) BEC (iv) BHC (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)

Answer»

Which of the following are also considerd to be the states of matter?

(i) Plasma (ii) Platelets (iii) BEC (iv) BHC

(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)

Discussion

5549.	how the ability of anion , to bring about coagulation of a given colloid , depends upo
Answer» how the ability of anion , to bring about coagulation of a given colloid , depends upo

Discussion

5550.	Number of valence and non valence electron in 3.6 gram of glucose
Answer» Number of valence and non valence electron in 3.6 gram of glucose

Discussion

Explore topic-wise InterviewSolutions in .

Match the reactions with the reaction types: I. 3CuS+8HNO3→3CuSO4+8NO(g)+4H2OA. Combination reactionII. NH3+HCl→NH4ClB. Displacement reactionIII. Br2+2KI→2KBr+I2C. Double displacement reactionIV. Na2S+2HCl→2NaCl+H2SD. Oxidation−reduction reaction

what is the concentration of NO_3^- ions when equal volumes of 0.1 M AgNO_3 and 0.1 M NaCl are mixed togethe

The reaction of ethanol with ethanoic acid in presence of concentrated H2SO4, produces _____.

Two liquids A and B form an ideal solution, A 1: 1 mixture (by mole) boils at 80oC. At this temperature pure A has a vapour pressure of 560 mm Hg. The vapour pressure of pure B at this temperature will be: (a) 200 mm Hg (b) 760 mm Hg (c) 860 mm Hg (d) 960 mm Hg

In the structure of ozone there are 3 oxygen atoms . In that 1 oxygen atom get (-)charge why? if it is forming the covalent bond and electronegativity is same for both oxyge

Who was the scientist credited with devising the first periodic table similar to one we use today?

Why is particularly centrifugation machine is used in separation of collides

With whom should I pair up? Group 'A' Group 'B' (1) Air (a) Excretion (2) Water (b) Scattering of light (3) Soil (c) Plasticity

34. 1.45 litres of a gas is collected over Water at 27 degree Celsius and 744 mm of Hg ,if the gas weights 1.98 grams and vapour pressure of water at 27 degree celsius is 32 mm what is the molecular weight of the gas

Question 27 What information do you get from the figure about the atomic number, mass number and valency of atoms X, Y and Z? Give your answer in a tabular form.

27.The rate of diffusion of a gas having molecular weight just double of hydrogen gas is 30ml/s. The rate of diffusion of hydrogen gas will be (1) 42.42ml/s (2) 60ml/s (3) 120ml/s (4) 21.21ml/s

which of the following is least towards S_N2 mechanism?(a) chloro-cyclopen†an e (b)3-chloropropene (c)chloro-cyclopropane (d) chloromethyl - cyclopropan

The mass of one steel screw is 4.11 g. Find the mass of one mole of these steel screws.

Question 10:How is evaporation different from boiling?

If one mole of H2 gas is occupies a rigid container with a capacity of 1000 litres and the temperature is raised from 27oC to 37oC, the change in pressure of the contained gas (round off to two decimal places), assuming ideal gas behaviour, is Pa(R=8.314J/mol−K) 83.14

Hydrogen and oxygen combined in the ratio of 1:8by mass to form water what mass of oxygen gas would be required to react completely with 3gram of hydrogen gas

A solution is made by dissolving 50 g of glucose in 250 g of water . Calculate the concentration of this solution in mass percentage

How many pentagons and hexagons are present in one molecule of fullerene C60?

Whare are the two types of pure substances ? Give one example of each type.

Sponge is a solid yet we are able to compress it. Why?

In the chemical formula of a diatomic ionic compound, the valency of the anion is three. What will be the valency of cation?3

Calculate the mass of an atom of atomic mass 260amu.

Which of the following is correct about fire?Fire is ____________.

Can photons be considered as neutrons because they are electrically neutral and not deflected by magnetic or electric field

12. When dil. ferrous sulphate solution reacts with potassium permanganate solution then the purple colour of the solution fades. What is the reason behind this?

How is the size of a degree on Celsius scale related to the size of a degree on Kelvin scale?

how many Schottky defects are there in 10 raise to 24 atoms

Is Fe2O3 basic or acidic in nature ?​

In a solution of pH = 5 more acid is added in order to reduce the pH to 3. Increase in hydrogen ion concentration is Options: Should have

Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.

Each of the stationary orbits are associated with:

under what conditions do noble gas elements form compound?

Question 48.Identify the compound X on the basis of the reactions given below. Also, write the name and chemical formulae of A, B and C.

Iron oxide has formula Fe0.94O. The fraction of Fe exists as Fe+3 is

Which of the following method(s) is/are used in preparing a base?

ratio of radius of H atom H+ ion.

Identify the Mg2+ ion from the figure where, n and p represent the number of neutrons and protons respectively.

why an electron can't goes into nucleus in stable elements

Justify the position of Hydrogen in the periodic table.

The third member of the family of alkenynes has the molecular formula.

Does Noble Gas Exhibits Chemical Reactivity? If yes, then why?

In what respects do the three isotopes of hydrogen differ ?

What is the reducing agent & oxidising agent in the reaction of Zinc Metal with Copper Sulphate ?

A solution reacts with crushed egg shells to give a gas that turns like water milky.Then what does that solution contain?

Which of the following are also considerd to be the states of matter? (i) Plasma (ii) Platelets (iii) BEC (iv) BHC (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)

how the ability of anion , to bring about coagulation of a given colloid , depends upo

Number of valence and non valence electron in 3.6 gram of glucose

Is Fe2O3 basic or acidic in nature ?