7248 + Interview Questions in Chemistry Page 69 InterviewSolution

3401.	The smell of hot sizzling food reaches several meters away, but to get the smell from cold food, we have to go close. Which of the following reason suits the best?
Answer» The smell of hot sizzling food reaches several meters away, but to get the smell from cold food, we have to go close. Which of the following reason suits the best?

Discussion

3402.	Name a fibre having properties similar to that of silk?
Answer» Name a fibre having properties similar to that of silk?

Discussion

3403.	What is the function of evaporating dish in labs?
Answer» What is the function of evaporating dish in labs?

3403.

What is the function of evaporating dish in labs?

Answer»

What is the function of evaporating dish in labs?

Discussion

3404.	Our body needs iron certain foods are rich in Iron and iron tablets are usually recommended by Doctors but neither the foods nor the tablets are hard like Iron explain
Answer» Our body needs iron certain foods are rich in Iron and iron tablets are usually recommended by Doctors but neither the foods nor the tablets are hard like Iron explain

Discussion

3405.	List the uses of water in various activities. Oceans are the biggest reservoirs of water. Explain why?
Answer» List the uses of water in various activities. Oceans are the biggest reservoirs of water. Explain why?

Discussion

3406.	Question 3To make a saturated solution, 36 gm of sodium chloride is dissolved in 100 gm of water at 293 K. Find its concentration at this temperature.
Answer» Question 3 To make a saturated solution, 36 gm of sodium chloride is dissolved in 100 gm of water at 293 K. Find its concentration at this temperature.

Discussion

3407.	Which one of the following is a chemical change?
Answer» Which one of the following is a chemical change?

Discussion

3408.	23.The formula of an oxide of iron is Fe0.93O1.00 if the compound has hundred O-2 ions then it contains how many Fe+3,Fe+2 ions
Answer» 23.The formula of an oxide of iron is Fe0.93O1.00 if the compound has hundred O-2 ions then it contains how many Fe+3,Fe+2 ions

Discussion

3409.	which bond is strongest between ionic bond and covalent bond
Answer» which bond is strongest between ionic bond and covalent bond

Discussion

3410.	Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.
Answer» Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.

Discussion

3411.	Which of the following activity(s) is/are involved in a chemical reaction ?
Answer» Which of the following activity(s) is/are involved in a chemical reaction ?

Discussion

3412.	6. Explain reactivity series ? write equations also ?
Answer» 6. Explain reactivity series ? write equations also ?

Discussion

3413.	What is the normal reaction of a block A above a block B with masses m1 and m2 respectively?
Answer» What is the normal reaction of a block A above a block B with masses m1 and m2 respectively?

Discussion

3414.	Foil made of ___ was used in alpha-ray scattering experiments by Rutherford.
Answer» Foil made of ___ was used in alpha-ray scattering experiments by Rutherford.

Discussion

3415.	At many places the wastewater containing human excreta from homes and carried in big underground pipes is dumped into a river as such which pollutes the riverwater. (a) What is the common name of such wastewater? (b) Name five types of harmful organisms contained in it. (c) Name any five human diseases caused by drinking river water contaminated with such wastewater.
Answer» At many places the wastewater containing human excreta from homes and carried in big underground pipes is dumped into a river as such which pollutes the riverwater. (a) What is the common name of such wastewater? (b) Name five types of harmful organisms contained in it. (c) Name any five human diseases caused by drinking river water contaminated with such wastewater.

3415.

At many places the wastewater containing human excreta from homes and carried in big underground pipes is dumped into a river as such which pollutes the riverwater. (a) What is the common name of such wastewater? (b) Name five types of harmful organisms contained in it. (c) Name any five human diseases caused by drinking river water contaminated with such wastewater.

Answer»

At many places the wastewater containing human excreta from homes and carried in big underground pipes is dumped into a river as such which pollutes the riverwater.

(a) What is the common name of such wastewater?

(b) Name five types of harmful organisms contained in it.

(c) Name any five human diseases caused by drinking river water contaminated with such wastewater.

Discussion

3416.	Why are atomic numbers and atomic mass numbers always whole numbers?
Answer» Why are atomic numbers and atomic mass numbers always whole numbers?

Discussion

3417.	How will you determine the nature of metal oxides?
Answer» How will you determine the nature of metal oxides?

Discussion

3418.	What is ignition temperature?
Answer» What is ignition temperature?

Discussion

3419.	Which of the following are the properties of an ideal source of energy?
Answer» Which of the following are the properties of an ideal source of energy?

Discussion

3420.	What is roll sulphur
Answer» What is roll sulphur

Discussion

3421.	A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains:1. NaCl2. HCl 3. LiCl 4. KCl
Answer» A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains: 1. NaCl 2. HCl 3. LiCl 4. KCl

Discussion

3422.	Rusting of iron objects is faster in coastal areas than in deserts? Why
Answer» Rusting of iron objects is faster in coastal areas than in deserts? Why

Discussion

3423.	Suppose copper was high up in the reactivity series. Would it still have been such a useful metal? Give reason (Could you please check my answer) Ans: yes it still would have been and useful Metal as it is used in making copper wires and electric cables in the electric appliances and the high reactivity of copper has no relation with the application it is used for.if copper had been highly reactive or low reactive It Would Still be used in making electric cables and wires
Answer» Suppose copper was high up in the reactivity series. Would it still have been such a useful metal? Give reason (Could you please check my answer) Ans: yes it still would have been and useful Metal as it is used in making copper wires and electric cables in the electric appliances and the high reactivity of copper has no relation with the application it is used for.if copper had been highly reactive or low reactive It Would Still be used in making electric cables and wires

3423.

Suppose copper was high up in the reactivity series. Would it still have been such a useful metal? Give reason (Could you please check my answer) Ans: yes it still would have been and useful Metal as it is used in making copper wires and electric cables in the electric appliances and the high reactivity of copper has no relation with the application it is used for.if copper had been highly reactive or low reactive It Would Still be used in making electric cables and wires

Answer»

Suppose copper was high up in the reactivity series. Would it still have been such a useful metal? Give reason

(Could you please check my answer)

Ans: yes it still would have been and useful Metal as it is used in making copper wires and electric cables in the electric appliances and the high reactivity of copper has no relation with the application it is used for.if copper had been highly reactive or low reactive It Would Still be used in making electric cables and wires

Discussion

3424.	How does fire occur? Why sparks lead to fire?
Answer» How does fire occur? Why sparks lead to fire?

Discussion

3425.	Name the fibre obtained by the chemical treatment of wood pulp (or cellulose).
Answer» Name the fibre obtained by the chemical treatment of wood pulp (or cellulose).

Discussion

3426.	Define the process of combustion.
Answer» Define the process of combustion.

Discussion

3427.	Which of the following is/are the allotropes of carbon?
Answer» Which of the following is/are the allotropes of carbon?

Discussion

3428.	What is fractional distillation? and is Asphalt the Residue obtained when petroleum is subjected to fractional distillation?
Answer» What is fractional distillation? and is Asphalt the Residue obtained when petroleum is subjected to fractional distillation?

Discussion

3429.	Is there any way or trick to find out whether the pπ-pπ bond or pπ-dπ bond is form in π bonding ?
Answer» Is there any way or trick to find out whether the pπ-pπ bond or pπ-dπ bond is form in π bonding ?

Discussion

3430.	Which of the following is an example of a double displacement reaction?
Answer» Which of the following is an example of a double displacement reaction?

Discussion

3431.	All double displacement reactions are not precipitation reactions. But are all the precipitation reactions double displacement reactions?
Answer» All double displacement reactions are not precipitation reactions. But are all the precipitation reactions double displacement reactions?

Discussion

3432.	Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.
Answer» Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.

Discussion

3433.	Classify the following processes into physical or chemical changes:(i) Beating of aluminium metal to make aluminium foil.(ii) Digestion of food.(iii) Cutting of a log of wood into pieces.(iv) Burning of crackers.
Answer» Classify the following processes into physical or chemical changes: (i) Beating of aluminium metal to make aluminium foil. (ii) Digestion of food. (iii) Cutting of a log of wood into pieces. (iv) Burning of crackers.

Discussion

3434.	Coal and petroleum are examples of _________ natural resources.
Answer» Coal and petroleum are examples of _________ natural resources.

Discussion

3435.	The main constituent of biogas is
Answer» The main constituent of biogas is

Discussion

3436.	What is meant by terra cotta? What are its uses?
Answer» What is meant by terra cotta? What are its uses?

Discussion

3437.	What do you observe when a little amount of curd is added to a bowl containing warm milk and kept for five hours?
Answer» What do you observe when a little amount of curd is added to a bowl containing warm milk and kept for five hours?

Discussion

3438.	Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.
Answer» Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.

Discussion

3439.	Select the correct characteristic of thermosetting polymers.
Answer» Select the correct characteristic of thermosetting polymers.

Discussion

3440.	Incomplete combustion of carbon based fuels like coal, wood causes -
Answer» Incomplete combustion of carbon based fuels like coal, wood causes -

Discussion

3441.	In a candle, the process of burning continues because:
Answer» In a candle, the process of burning continues because:

Discussion

3442.	Which of the following option correctly differentiates between evaporation and boiling?
Answer» Which of the following option correctly differentiates between evaporation and boiling?

Discussion

3443.	30. A gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y and 1 M Z at 25^° C. If the standard oxidatiion potential of Z > Y > X, then :- Options: 1. Y will reduce both X and Z 2. Y will oxidise Z and not X 3. Y will oxidise both X and Z 4. Y will oxidise X and not Z
Answer» 30. A gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y and 1 M Z at 25^° C. If the standard oxidatiion potential of Z > Y > X, then :- Options: 1. Y will reduce both X and Z 2. Y will oxidise Z and not X 3. Y will oxidise both X and Z 4. Y will oxidise X and not Z

Discussion

3444.	What are oxides ? Give two examples of each of the following oxides. (a) Basis oxide (b) Acidic oxide (c) Amphoteric oxide (d) Neutral oxide
Answer» What are oxides ? Give two examples of each of the following oxides. (a) Basis oxide (b) Acidic oxide (c) Amphoteric oxide (d) Neutral oxide

3444.

What are oxides ? Give two examples of each of the following oxides. (a) Basis oxide (b) Acidic oxide (c) Amphoteric oxide (d) Neutral oxide

Answer»

What are oxides ? Give two examples of each of the following oxides.

(a) Basis oxide (b) Acidic oxide

(c) Amphoteric oxide (d) Neutral oxide

Discussion

3445.

Some of the water quality parameters are measured by titrating a water sample with a titrant. Group-I gives a list of parameters and Group-II gives the list of titrant. Groups - IGroups - IIP. Alkalinity1. N/35.5AgNO3Q. Hardness2. N/40Na2S2O3.R. Chloride3 H2SO4S. Dissolved oxygen4. N/50EDTACodes:

Answer»

Some of the water quality parameters are measured by titrating a water sample with a titrant. Group-I gives a list of parameters and Group-II gives the list of titrant.

Groups - I	Groups - II
P. Alkalinity	1. $N / 35.5 A g N O_{3}$
Q. Hardness	2. $N / 40 N a_{2} S_{2} O_{3}$ .
R. Chloride	3 $H_{2} S O_{4}$
S. Dissolved oxygen	4. $N / 50 E D T A$

Codes:

Discussion

3446.	Question 3The property to flow is unique to fluids, Which one of the following statements is correct?(a) Only gases behave like fluids(b) Gases and solids behave like fluids(c) Gases and liquids behave like fluids(d) Only liquids are fluids
Answer» Question 3 The property to flow is unique to fluids, Which one of the following statements is correct? (a) Only gases behave like fluids (b) Gases and solids behave like fluids (c) Gases and liquids behave like fluids (d) Only liquids are fluids

Discussion

3447.	Write any two differences between a chemical change and a physical change.
Answer» Write any two differences between a chemical change and a physical change.

Discussion

3448.	What is the principle of centrifugation? List some daily-life uses of centrifugation.
Answer» What is the principle of centrifugation? List some daily-life uses of centrifugation.

Discussion

3449.	How is the strength of intermolecular force in the liquid state?
Answer» How is the strength of intermolecular force in the liquid state?

Discussion

3450.	Heat of combustion of CH4, C2H4 & C2H6 are-890, -1411 & 1550 kJ/mol respectively. Which hasthe lowest calorific fuel value in kJ/g?
Answer» Heat of combustion of CH4, C2H4 & C2H6 are-890, -1411 & 1550 kJ/mol respectively. Which hasthe lowest calorific fuel value in kJ/g?

Discussion

Explore topic-wise InterviewSolutions in .

The smell of hot sizzling food reaches several meters away, but to get the smell from cold food, we have to go close. Which of the following reason suits the best?

Name a fibre having properties similar to that of silk?

What is the function of evaporating dish in labs?

Our body needs iron certain foods are rich in Iron and iron tablets are usually recommended by Doctors but neither the foods nor the tablets are hard like Iron explain

List the uses of water in various activities. Oceans are the biggest reservoirs of water. Explain why?

Question 3To make a saturated solution, 36 gm of sodium chloride is dissolved in 100 gm of water at 293 K. Find its concentration at this temperature.

Which one of the following is a chemical change?

23.The formula of an oxide of iron is Fe0.93O1.00 if the compound has hundred O-2 ions then it contains how many Fe+3,Fe+2 ions

which bond is strongest between ionic bond and covalent bond

Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.

Which of the following activity(s) is/are involved in a chemical reaction ?

6. Explain reactivity series ? write equations also ?

What is the normal reaction of a block A above a block B with masses m1 and m2 respectively?

Foil made of ___ was used in alpha-ray scattering experiments by Rutherford.

Why are atomic numbers and atomic mass numbers always whole numbers?

How will you determine the nature of metal oxides?

What is ignition temperature?

Which of the following are the properties of an ideal source of energy?

What is roll sulphur

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains:1. NaCl2. HCl 3. LiCl 4. KCl

Rusting of iron objects is faster in coastal areas than in deserts? Why

How does fire occur? Why sparks lead to fire?

Name the fibre obtained by the chemical treatment of wood pulp (or cellulose).

Define the process of combustion.

Which of the following is/are the allotropes of carbon?

What is fractional distillation? and is Asphalt the Residue obtained when petroleum is subjected to fractional distillation?

Is there any way or trick to find out whether the pπ-pπ bond or pπ-dπ bond is form in π bonding ?

Which of the following is an example of a double displacement reaction?

All double displacement reactions are not precipitation reactions. But are all the precipitation reactions double displacement reactions?

Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.

Classify the following processes into physical or chemical changes:​(i) Beating of aluminium metal to make aluminium foil.​(ii) Digestion of food.(iii) Cutting of a log of wood into pieces.(iv) Burning of crackers.

Coal and petroleum are examples of _________ natural resources.

The main constituent of biogas is

What is meant by terra cotta? What are its uses?

What do you observe when a little amount of curd is added to a bowl containing warm milk and kept for five hours?

Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.

Select the correct characteristic of thermosetting polymers.

Incomplete combustion of carbon based fuels like coal, wood causes -

In a candle, the process of burning continues because:

Which of the following option correctly differentiates between evaporation and boiling?

30. A gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y and 1 M Z at 25^° C. If the standard oxidatiion potential of Z > Y > X, then :- Options: 1. Y will reduce both X and Z 2. Y will oxidise Z and not X 3. Y will oxidise both X and Z 4. Y will oxidise X and not Z

What are oxides ? Give two examples of each of the following oxides. (a) Basis oxide (b) Acidic oxide (c) Amphoteric oxide (d) Neutral oxide

Some of the water quality parameters are measured by titrating a water sample with a titrant. Group-I gives a list of parameters and Group-II gives the list of titrant. Groups - IGroups - IIP. Alkalinity1. N/35.5AgNO3Q. Hardness2. N/40Na2S2O3.R. Chloride3 H2SO4S. Dissolved oxygen4. N/50EDTACodes:

Question 3The property to flow is unique to fluids, Which one of the following statements is correct?(a) Only gases behave like fluids(b) Gases and solids behave like fluids(c) Gases and liquids behave like fluids(d) Only liquids are fluids

Write any two differences between a chemical change and a physical change.

What is the principle of centrifugation? List some daily-life uses of centrifugation.

How is the strength of intermolecular force in the liquid state?

Heat of combustion of CH4, C2H4 & C2H6 are-890, -1411 & 1550 kJ/mol respectively. Which hasthe lowest calorific fuel value in kJ/g?

Classify the following processes into physical or chemical changes:(i) Beating of aluminium metal to make aluminium foil.(ii) Digestion of food.(iii) Cutting of a log of wood into pieces.(iv) Burning of crackers.