5083 + Interview Questions in Chemistry Page 51 InterviewSolution

2501.	20g of hot water at 30^°C is mixed with 10g of ice at 0^°C then temperature of mixture is 1. 20^°C 2. 15^°C 3. 5^°C 4. 0^°C
Answer» 20g of hot water at 30^°C is mixed with 10g of ice at 0^°C then temperature of mixture is 1. 20^°C 2. 15^°C 3. 5^°C 4. 0^°C

Discussion

2502.	Which among the following words is a noun acting like an adjective? Mitra wears cotton dresses in the summers to beat the heat.
Answer» Which among the following words is a noun acting like an adjective? Mitra wears cotton dresses in the summers to beat the heat.

2502.

Which among the following words is a noun acting like an adjective? Mitra wears cotton dresses in the summers to beat the heat.

Answer»

Which among the following words is a noun acting like an adjective?

Mitra wears cotton dresses in the summers to beat the heat.

Discussion

2503.	Specific conductance of 0.1 M NaCl solution is 1.01×10−2ohm−1cm−1. Its molar conductance in ohm−1cm2mol−1 is :
Answer» Specific conductance of $0.1 M N a C l$ solution is $1.01 \times 10^{- 2} o h m^{- 1} c m^{- 1}$ . Its molar conductance in $o h m^{- 1} c m^{2} m o l^{- 1}$ is :

Discussion

2504.	Why is graphite a good conductor of electricity?
Answer» Why is graphite a good conductor of electricity?

Discussion

2505.	What is annealing?
Answer» What is annealing?

Discussion

2506.	How respiration in plants is different from that in animals?
Answer» How respiration in plants is different from that in animals?

Discussion

2507.	ntThe emf of the following cell is 0.265 V at 25 deg. C and 0.2595 V at 35 deg. C . Calculate heat of reaction taking place at 25 deg. C .n nt Pt(H2) \| HCl(aq) \|\| AgCl \| Agn
Answer» ntThe emf of the following cell is 0.265 V at 25 deg. C and 0.2595 V at 35 deg. C . Calculate heat of reaction taking place at 25 deg. C .n nt Pt(H2) \| HCl(aq) \|\| AgCl \| Agn

Discussion

2508.

2NO(g)+Cl2(g)→2NOCl(s): This reaction was studied at –10oCand the following data was obtained Run [NO]0 Cl]0 r0 1 0.10 0.10 0.18 2 0.10 0.20 0.35 3 0.20 0.20 1.40 [NO]0 and [Cl2]0 are the initial concentrations and r0 is the initial reaction rate. The overall order of the reaction is . (Round off to the Nearest Integer).

Answer»

2 N O (g) + C l_{2} (g) \to 2 N O C l (s) :

This reaction was studied at

- 10^{o} C

and the following data was obtained

Run	$[N O]_{0}$	$C l]_{0}$	$r_{0}$
1	0.10	0.10	0.18
2	0.10	0.20	0.35
3	0.20	0.20	1.40

[N O]_{0}

and

[C l_{2}]_{0}

are the initial concentrations and

r_{0}

is the initial reaction rate. The overall order of the reaction is . (Round off to the Nearest Integer).

Discussion

2509.	The process of creating fabric out of threads using interlocking patterns and knots is called
Answer» The process of creating fabric out of threads using interlocking patterns and knots is called

Discussion

2510.	Question 9Name A,B,C,D,E and F in the following diagram showing change in its state
Answer» Question 9 Name A,B,C,D,E and F in the following diagram showing change in its state

Discussion

2511.	Write any five metal hydroxides with their molecular formula.
Answer» Write any five metal hydroxides with their molecular formula.

Discussion

2512.	We can prevent ourselves from getting infected by water-borne diseases by consuming clean drinking water. Explain.
Answer» We can prevent ourselves from getting infected by water-borne diseases by consuming clean drinking water. Explain.

Discussion

2513.	What is selective breeding?
Answer» What is selective breeding?

Discussion

2514.	Which of the following changes is/are a chemical change?
Answer» Which of the following changes is/are a chemical change?

Discussion

2515.	Fascinating facts about water
Answer» Fascinating facts about water

Discussion

2516.	Acid rain can damage -
Answer» Acid rain can damage -

Discussion

2517.	69. A solution of urea is isotonic with 12 g/l glucose solution at 300 k .the Concentration of urea is
Answer» 69. A solution of urea is isotonic with 12 g/l glucose solution at 300 k .the Concentration of urea is

Discussion

2518.	What will happen to the candle placed inside a jar containing nitrogen?
Answer» What will happen to the candle placed inside a jar containing nitrogen?

Discussion

2519.	positive circle in between a 3 membered Carbon rings represents what?
Answer» positive circle in between a 3 membered Carbon rings represents what?

Discussion

2520.	How does the intermolecular distance affect solid, liquid and gas?
Answer» How does the intermolecular distance affect solid, liquid and gas?

Discussion

2521.	Question 21 If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust. (a) Do you think rust is different from iron? (b) Can you change rust back into iron by some simple method. (c) Do you think formation of rust from iron is a chemical change? (d) Give two other examples of a similar type of change.
Answer» Question 21 If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust. (a) Do you think rust is different from iron? (b) Can you change rust back into iron by some simple method. (c) Do you think formation of rust from iron is a chemical change? (d) Give two other examples of a similar type of change.

2521.

Question 21 If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust. (a) Do you think rust is different from iron? (b) Can you change rust back into iron by some simple method. (c) Do you think formation of rust from iron is a chemical change? (d) Give two other examples of a similar type of change.

Answer»

Question 21

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
(a) Do you think rust is different from iron?
(b) Can you change rust back into iron by some simple method.
(c) Do you think formation of rust from iron is a chemical change?
(d) Give two other examples of a similar type of change.

Discussion

2522.	A report titled “Global Methane Assessment: Benefits and Costs of Mitigating Methane Emissions” was released recently. In this regard which among the following statement is correct?
Answer» A report titled “Global Methane Assessment: Benefits and Costs of Mitigating Methane Emissions” was released recently. In this regard which among the following statement is correct?

Discussion

2523.	During which step of wastewater treatment sterilization of water occurs?
Answer» During which step of wastewater treatment sterilization of water occurs?

Discussion

2524.	Question 43.In the following schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if the following changes are made? In place of zinc granules, same amount of zinc dust is taken in the test tube. Instead of dilute acid, dilute hydrochloric acid is taken. In place of zinc, copper turnings are taken. Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated.
Answer» Question 43. In the following schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if the following changes are made? In place of zinc granules, same amount of zinc dust is taken in the test tube. Instead of dilute acid, dilute hydrochloric acid is taken. In place of zinc, copper turnings are taken. Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated.

Discussion

2525.	What is phenolphthalein?
Answer» What is phenolphthalein?

Discussion

2526.	Mettez au pluriel.1. C'est une jupe noire.2. J'ai une grande voiture marron.3. Tu achètes un joli tee-shirt orange.4. Ton livre d'anglais est bleu.5. Mon chien est très méchant.
Answer» Mettez au pluriel. 1. C'est une jupe noire. 2. J'ai une grande voiture marron. 3. Tu achètes un joli tee-shirt orange. 4. Ton livre d'anglais est bleu. 5. Mon chien est très méchant.

Discussion

2527.	Explain three methods of seed dispersal? [3 MARKS]
Answer» Explain three methods of seed dispersal? [3 MARKS]

Discussion

2528.	Chemical name if vinegar?
Answer» Chemical name if vinegar?

Discussion

2529.	72.Baking soda is an acidic salt or a basic salt.? (NaHCO3 is formed from a weak acid and a strong base so it should be basic but it also has one replaceable H present so what will we consider here?)
Answer» 72.Baking soda is an acidic salt or a basic salt.? (NaHCO3 is formed from a weak acid and a strong base so it should be basic but it also has one replaceable H present so what will we consider here?)

Discussion

2530.	The rate of a first-order reaction is 0.04 mol–1s–1 at 10 seconds and 0.03 mol–1s–1 at 20 seconds after initiation of the reaction. The half-life period of the reaction is
Answer» The rate of a first-order reaction is $0.04 m o l^{- 1} s^{- 1}$ at 10 seconds and 0.03 $m o l^{- 1} s^{- 1}$ at 20 seconds after initiation of the reaction. The half-life period of the reaction is

Discussion

2531.	Define positive and negative catalysts.
Answer» Define positive and negative catalysts.

Discussion

2532.	Question 1(a) Classify the changes involved in the following processes as physical or chemical changes: Photosynthesis
Answer» Question 1(a) Classify the changes involved in the following processes as physical or chemical changes: Photosynthesis

Discussion

2533.	What will happen if we mix a turmeric solution to soap solution and test it on both litmus papers??
Answer» What will happen if we mix a turmeric solution to soap solution and test it on both litmus papers??

Discussion

2534.	What is the reeling of the silk, how a single thread is formed?
Answer» What is the reeling of the silk, how a single thread is formed?

Discussion

2535.	79.Derive an expression for the excess of pressure inside a liquid drop
Answer» 79.Derive an expression for the excess of pressure inside a liquid drop

Discussion

2536.	What is the chemical name of water?
Answer» What is the chemical name of water?

Discussion

2537.	Nomenclature for m-ClCH2C6H4CH2C(CH3)2
Answer» Nomenclature for m-ClCH2C6H4CH2C(CH3)2

Discussion

2538.	What is the percolation of water? How is it different for different types of soil?
Answer» What is the percolation of water? How is it different for different types of soil?

Discussion

2539.	Why and how nh4oh is partially ionised inwater
Answer» Why and how nh4oh is partially ionised inwater

Discussion

2540.	Which of the following compound are formed by ionic bonding?
Answer» Which of the following compound are formed by ionic bonding?

Discussion

2541.	Differentiate between physical change and chemical change
Answer» Differentiate between physical change and chemical change

Discussion

2542.	Which of the following metals are available in free state in nature?
Answer» Which of the following metals are available in free state in nature?

Discussion

2543.	Ammonium chloride and salt is separated by the process of ______________. The volatile component in this case is ______________.
Answer» Ammonium chloride and salt is separated by the process of ______________. The volatile component in this case is ______________.

Discussion

2544.	27. What quantity of copper oxide will react with 2.80L of hydrogen at NTP?
Answer» 27. What quantity of copper oxide will react with 2.80L of hydrogen at NTP?

Discussion

2545.	On decomposition of 0.08 mole of CaCO3, why is the number of moles of CaO and CO2 equal to 0.08 ?
Answer» On decomposition of 0.08 mole of CaCO3, why is the number of moles of CaO and CO2 equal to 0.08 ?

Discussion

2546.	What is the term given to the instrument to bend the path of heavy and light massed charged particles like isotopes, to separate the components of a mixture on a atomic or molecular level?
Answer» What is the term given to the instrument to bend the path of heavy and light massed charged particles like isotopes, to separate the components of a mixture on a atomic or molecular level?

2546.

What is the term given to the instrument to bend the path of heavy and light massed charged particles like isotopes, to separate the components of a mixture on a atomic or molecular level?

Answer»

What is the term given to the instrument to bend the path of heavy and light massed charged particles like isotopes, to separate the components of a mixture on a atomic or molecular level?

Discussion

2547.	Which of the following is correct about ozone?
Answer» Which of the following is correct about ozone?

Discussion

2548.	Deepti went on an expedition to Iceland. Because it is very cold there she took a fur coat with her. On reaching there she realised that it was so cold that even the fur coat was not enough. A local friend told friend told her to wear the fur coat inside out so that the fur side was inside. She tried it and felt much warmer. But she was confused. She knew that fur traps air that provides insulation from the cold. but could not understand why inverting the coat made it more effective. Can you solve her confusion?
Answer» Deepti went on an expedition to Iceland. Because it is very cold there she took a fur coat with her. On reaching there she realised that it was so cold that even the fur coat was not enough. A local friend told friend told her to wear the fur coat inside out so that the fur side was inside. She tried it and felt much warmer. But she was confused. She knew that fur traps air that provides insulation from the cold. but could not understand why inverting the coat made it more effective. Can you solve her confusion?

Discussion

2549.	The 'set up', used in the laboratory, to collect sulphur dioxide, is that shown in figure :(1) I(2) II(3) III(4) IV
Answer» The 'set up', used in the laboratory, to collect sulphur dioxide, is that shown in figure : (1) I (2) II (3) III (4) IV

Discussion

2550.

Identify the animal shown below which is commonly used for obtaining wool, meat and milk in Ladakh, Sikkim and Tibet:

Answer»

Identify the animal shown below which is commonly used for obtaining wool, meat and milk in Ladakh, Sikkim and Tibet:

Discussion

Explore topic-wise InterviewSolutions in .

20g of hot water at 30^°C is mixed with 10g of ice at 0^°C then temperature of mixture is 1. 20^°C 2. 15^°C 3. 5^°C 4. 0^°C

Which among the following words is a noun acting like an adjective? Mitra wears cotton dresses in the summers to beat the heat.

Specific conductance of 0.1 M NaCl solution is 1.01×10−2ohm−1cm−1. Its molar conductance in ohm−1cm2mol−1 is :

Why is graphite a good conductor of electricity?

What is annealing?

How respiration in plants is different from that in animals?

ntThe emf of the following cell is 0.265 V at 25 deg. C and 0.2595 V at 35 deg. C . Calculate heat of reaction taking place at 25 deg. C .n nt Pt(H2) | HCl(aq) || AgCl | Agn

The process of creating fabric out of threads using interlocking patterns and knots is called

Question 9Name A,B,C,D,E and F in the following diagram showing change in its state

Write any five metal hydroxides with their molecular formula.

We can prevent ourselves from getting infected by water-borne diseases by consuming clean drinking water. Explain.

What is selective breeding?

Which of the following changes is/are a chemical change?

Fascinating facts about water

Acid rain can damage -

69. A solution of urea is isotonic with 12 g/l glucose solution at 300 k .the Concentration of urea is

What will happen to the candle placed inside a jar containing nitrogen?

positive circle in between a 3 membered Carbon rings represents what?

How does the intermolecular distance affect solid, liquid and gas?

A report titled “Global Methane Assessment: Benefits and Costs of Mitigating Methane Emissions” was released recently. In this regard which among the following statement is correct?

During which step of wastewater treatment sterilization of water occurs?

What is phenolphthalein?

Mettez au pluriel.1. C'est une jupe noire.2. J'ai une grande voiture marron.3. Tu achètes un joli tee-shirt orange.4. Ton livre d'anglais est bleu.5. Mon chien est très méchant.

Explain three methods of seed dispersal? [3 MARKS]

Chemical name if vinegar?

72.Baking soda is an acidic salt or a basic salt.? (NaHCO3 is formed from a weak acid and a strong base so it should be basic but it also has one replaceable H present so what will we consider here?)

The rate of a first-order reaction is 0.04 mol–1s–1 at 10 seconds and 0.03 mol–1s–1 at 20 seconds after initiation of the reaction. The half-life period of the reaction is

Define positive and negative catalysts.

Question 1(a) Classify the changes involved in the following processes as physical or chemical changes: Photosynthesis

What will happen if we mix a turmeric solution to soap solution and test it on both litmus papers??

What is the reeling of the silk, how a single thread is formed?

79.Derive an expression for the excess of pressure inside a liquid drop

What is the chemical name of water?

Nomenclature for m-ClCH2C6H4CH2C(CH3)2

What is the percolation of water? How is it different for different types of soil?

Why and how nh4oh is partially ionised inwater

Which of the following compound are formed by ionic bonding?

Differentiate between physical change and chemical change

Which of the following metals are available in free state in nature?

Ammonium chloride and salt is separated by the process of ______________. The volatile component in this case is ______________.

27. What quantity of copper oxide will react with 2.80L of hydrogen at NTP?

On decomposition of 0.08 mole of CaCO3, why is the number of moles of CaO and CO2 equal to 0.08 ?

What is the term given to the instrument to bend the path of heavy and light massed charged particles like isotopes, to separate the components of a mixture on a atomic or molecular level?

Which of the following is correct about ozone?

The 'set up', used in the laboratory, to collect sulphur dioxide, is that shown in figure :(1) I(2) II(3) III(4) IV

Identify the animal shown below which is commonly used for obtaining wool, meat and milk in Ladakh, Sikkim and Tibet:

Ammonium chloride and salt is separated by the process of . The volatile component in this case is .