7248 + Interview Questions in Chemistry Page 29 InterviewSolution

1401.	The least reactive metal among the following is: (a) magnesium (b) lead (c) silver (d) sodium
Answer» The least reactive metal among the following is: (a) magnesium (b) lead (c) silver (d) sodium

1401.

The least reactive metal among the following is: (a) magnesium (b) lead (c) silver (d) sodium

Answer»

The least reactive metal among the following is:

(a) magnesium

(b) lead

(c) silver

(d) sodium

Discussion

1402.	Consider the statements regarding geysers which are special type of hot springs. 1. Hot water and vapour spouts from geyser tube intermittently. 2.It represents the minor form of broader processes of vulcanicity. 3. It is found only in tropical regions. Choose the incorrect statement/s from the following code.
Answer» Consider the statements regarding geysers which are special type of hot springs. 1. Hot water and vapour spouts from geyser tube intermittently. 2.It represents the minor form of broader processes of vulcanicity. 3. It is found only in tropical regions. Choose the incorrect statement/s from the following code.

1402.

Consider the statements regarding geysers which are special type of hot springs. 1. Hot water and vapour spouts from geyser tube intermittently. 2.It represents the minor form of broader processes of vulcanicity. 3. It is found only in tropical regions. Choose the incorrect statement/s from the following code.

Answer»

Consider the statements regarding geysers which are special type of hot springs.

1. Hot water and vapour spouts from geyser tube intermittently.

2.It represents the minor form of broader processes of vulcanicity.

3. It is found only in tropical regions.

Choose the incorrect statement/s from the following code.

Discussion

1403.	Tungsten metal is used for making the filaments of electrical bulbs because:
Answer» Tungsten metal is used for making the filaments of electrical bulbs because:

1403.

Tungsten metal is used for making the filaments of electrical bulbs because:

Answer»

Tungsten metal is used for making the filaments of electrical bulbs because:

Discussion

1404.	You are holidaying on the beautiful but hot Thar desert. Which of the following would happen in your body in response to the environmental temperature?
Answer» You are holidaying on the beautiful but hot Thar desert. Which of the following would happen in your body in response to the environmental temperature?

Discussion

1405.	compound that can only act as oxidizing agent is 1) HCIO_4 2) HCIO_3 3) HCIO_{} 4) HCIO
Answer» compound that can only act as oxidizing agent is 1) HCIO_4 2) HCIO_3 3) HCIO_{} 4) HCIO

Discussion

1406.	The flame of a candle is always upright due to ___________.
Answer» The flame of a candle is always upright due to ___________.

Discussion

1407.	Question 1Among Zinc, Phosphorus, Sulpher and Oxygen which can be beaten into thin sheets?
Answer» Question 1 Among Zinc, Phosphorus, Sulpher and Oxygen which can be beaten into thin sheets?

Discussion

1408.	When dilute sulphuric acid is added to granulated zinc placed in a test-tube, the observation made is :(1) the surface of the metal turns shiny(2) the reaction mixture turns milky(3) odour of sulphur dioxide is observed(4) a colourless and odourless gas evolves with bubbles
Answer» When dilute sulphuric acid is added to granulated zinc placed in a test-tube, the observation made is : (1) the surface of the metal turns shiny (2) the reaction mixture turns milky (3) odour of sulphur dioxide is observed (4) a colourless and odourless gas evolves with bubbles

Discussion

1409.	Some amines are shown below
Answer» Some amines are shown below

1409.

Some amines are shown below

Answer»

Some amines are shown below

Discussion

1410.	39.Two isolated large metal plates are charged to charge densities +sigma and - sigma respectively. Now they are brought together to form a parallel plate capcitor. Electrostatic pressure experienced by each of the plates is_
Answer» 39.Two isolated large metal plates are charged to charge densities +sigma and - sigma respectively. Now they are brought together to form a parallel plate capcitor. Electrostatic pressure experienced by each of the plates is_

Discussion

1411.	Which among the following has a cyclic structure made up of carbon skeletal?
Answer» Which among the following has a cyclic structure made up of carbon skeletal?

Discussion

1412.	Question 9Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from the synthetic material? Advise Rana, giving your reason.
Answer» Question 9 Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from the synthetic material? Advise Rana, giving your reason.

Discussion

1413.	Define one atomic mass
Answer» Define one atomic mass

Discussion

1414.	When do we use the term "excess air"?
Answer» When do we use the term "excess air"?

Discussion

1415.	A boy poured honey into a bowl, he tried to break the flow of honey with his fingers but found it difficult, which of the following may be the reason?
Answer» A boy poured honey into a bowl, he tried to break the flow of honey with his fingers but found it difficult, which of the following may be the reason?

Discussion

1416.	Who believed that all kinds of matter are made up of only 4 elements?
Answer» Who believed that all kinds of matter are made up of only 4 elements?

Discussion

1417.	How NaAlO2 formula formed
Answer» How NaAlO2 formula formed

Discussion

1418.	Define the law of conservation of mass.
Answer» Define the law of conservation of mass.

Discussion

1419.	Name the petroleum product used for surfacing roads.
Answer» Name the petroleum product used for surfacing roads.

Discussion

1420.	Exception of Metals and Non metals
Answer» Exception of Metals and Non metals

Discussion

1421.	What is the petroleum product used for aviation purposes and can petrol be used for this?
Answer» What is the petroleum product used for aviation purposes and can petrol be used for this?

Discussion

1422.	In all metals like iron all atoms are attached to each other or not?
Answer» In all metals like iron all atoms are attached to each other or not?

Discussion

1423.	What is dark zone, luminous zone and non - luminous zone?
Answer» What is dark zone, luminous zone and non - luminous zone?

Discussion

1424.	Write down the names of compounds represented by the following formulae: (v) CaCO3
Answer» Write down the names of compounds represented by the following formulae: $(v) C a C O_{3}$

Discussion

1425.	Reaction NamesReactionsiDisplacement reactionACaO+O2→2Ca(OH)2iiDecomposition ReactionBFe+Pb(NO3)2→Fe(NO3)2+PbiiiRedox ReactionCMgCl2+Ca(OH)2→Mg(OH)2+CaCl2ivCombination ReactionDKClO3→2KCl+3O2vDouble Displacement ReactionECO2+H2→2CO+H2O
Answer» $\begin{matrix} Reaction Names & Reactions i & Displacement reaction & A & C a O + O_{2} \to 2 C a (O H)_{2} i i & Decomposition Reaction & B & F e + P b (N O_{3})_{2} \to F e (N O_{3})_{2} + P b i i i & Redox Reaction & C & M g C l_{2} + C a (O H)_{2} \to M g (O H)_{2} + C a C l_{2} i v & Combination Reaction & D & K C l O_{3} \to 2 K C l + 3 O_{2} v & Double Displacement Reaction & E & C O_{2} + H_{2} \to 2 C O + H_{2} O \end{matrix}$

Discussion

1426.	Difference of displacement reaction and percipitation reaction?(tabular form)
Answer» Difference of displacement reaction and percipitation reaction?(tabular form)

Discussion

1427.	Which of the following is an electrophilic agent?
Answer» Which of the following is an electrophilic agent?

Discussion

1428.	Question 10What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?
Answer» Question 10 What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?

Discussion

1429.	Differentiate between evaporation and boiling. [3 MARKS]
Answer» Differentiate between evaporation and boiling. [3 MARKS]

Discussion

1430.	Explain with an experiment that the melting of wax is a physical change.Observe the changes around you and make a list of these changes and categories them into physical and chemical change.(At least 10 for each) With the help of a suitable diagram explain the change of state of matter , with respect to 1. Kinetic energy 2. Intermolecular force of attraction 3. Intermolecular space
Answer» Explain with an experiment that the melting of wax is a physical change.Observe the changes around you and make a list of these changes and categories them into physical and chemical change.(At least 10 for each) With the help of a suitable diagram explain the change of state of matter , with respect to 1. Kinetic energy 2. Intermolecular force of attraction 3. Intermolecular space

1430.

Explain with an experiment that the melting of wax is a physical change.Observe the changes around you and make a list of these changes and categories them into physical and chemical change.(At least 10 for each) With the help of a suitable diagram explain the change of state of matter , with respect to 1. Kinetic energy 2. Intermolecular force of attraction 3. Intermolecular space

Answer»

Explain with an experiment that the melting of wax is a physical change.Observe the changes around you and make a list of these changes and categories them into physical and chemical change.(At least 10 for each)

With the help of a suitable diagram explain the change of state of matter , with respect to

1. Kinetic energy

2. Intermolecular force of attraction

3. Intermolecular space

Discussion

1431.	What will happen to its boiling point If you add impurities to water?
Answer» What will happen to its boiling point If you add impurities to water?

Discussion

1432.	If 49g of Sodium Chloride is added to 1000g of water. What is the concentration of the solution at room temperature?
Answer» If 49g of Sodium Chloride is added to 1000g of water. What is the concentration of the solution at room temperature?

Discussion

1433.	The garden furniture generally has 'thermoplastics' written on it, what does this mean?
Answer» The garden furniture generally has 'thermoplastics' written on it, what does this mean?

Discussion

1434.

Tick thecorrect answer.(i)Which one of the following does not make a substance aresource? (a) Utility (b) Value (c) Quantity (ii)Which one of the following is a human-made resource? (a) Medicines to treat cancer (b) Spring water (c) Tropical forests (iii)Biotic resources are (a) Derived from living things (b) Made by human beings (c) Derived from non-living things

Answer»

Tick the
correct answer.

(i)
Which one of the following does not make a substance a
resource?

(a)
Utility

(b)
Value

(c)
Quantity

(ii)
Which one of the following is a human-made resource?

(a) Medicines to
treat cancer

(b) Spring water

(c) Tropical forests

(iii)
Biotic resources are

(a) Derived from
living things

(b) Made by human
beings

(c) Derived from
non-living things

Discussion

1435.	55 Balance the equation by oxidation no. method. MnO4 -- + Br- this give us Mn2+ + Br2
Answer» 55 Balance the equation by oxidation no. method. MnO4 -- + Br- this give us Mn2+ + Br2

Discussion

1436.	19.A solution of Al2(SO4)3 {d=1.253} contain 22℅ salt by weight. The molarity normality, molalit of solution is?
Answer» 19.A solution of Al2(SO4)3 {d=1.253} contain 22℅ salt by weight. The molarity normality, molalit of solution is?

Discussion

1437.	When sodium chloride dissolve in water, sodium chloride dissociates into Sodium and chlorine then why sodium does not react with water to form sodium hydroxide?
Answer» When sodium chloride dissolve in water, sodium chloride dissociates into Sodium and chlorine then why sodium does not react with water to form sodium hydroxide?

Discussion

1438.	A chemical compound having smell of chlorine is used to remove yellowness of white clothes in laundries. Name the compound and write the chemical equation involved in its preparation. [2 MARKS]
Answer» A chemical compound having smell of chlorine is used to remove yellowness of white clothes in laundries. Name the compound and write the chemical equation involved in its preparation. [2 MARKS]

Discussion

1439.	97. In a bohr's model of an atom, when an electron jump from n=1 to n=3, how much energy will be emitted or absorbed?
Answer» 97. In a bohr's model of an atom, when an electron jump from n=1 to n=3, how much energy will be emitted or absorbed?

Discussion

1440.	9.033×1023 atoms of hydrogen is equal to:
Answer» $9.033 \times 10^{23}$ atoms of hydrogen is equal to:

Discussion

1441.

Complete the following table.(i) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species 9 - 10 - - - (ii) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species 16 32 - - - Sulphur (iii) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species 16 32 - - - Sulphur (iv) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species - 2 - 1 - - (v) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species - 1 0 1 1 -

Answer» Complete the following table.

(i)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
9	-	10	-	-	-

(ii)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
16	32	-	-	-	Sulphur

(iii)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
16	32	-	-	-	Sulphur

(iv)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
-	2	-	1	-	-

(v)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
-	1	0	1	1	-

Discussion

1442.	Question 2 (b) Fill in the blank: A liquid fuel used in homes is ___.
Answer» Question 2 (b) Fill in the blank: A liquid fuel used in homes is ___.

Discussion

1443.	State the law of conservation of mass. Give one example to illustrate this law.
Answer» State the law of conservation of mass. Give one example to illustrate this law.

Discussion

1444.	Which of the following best describes gas?
Answer» Which of the following best describes gas?

Discussion

1445.	two uniform charged spherical drops each at a potential V coalesce to form a larger drop. if the capacity of each smaller drop is C then find the capacity and potential to larger drop
Answer» two uniform charged spherical drops each at a potential V coalesce to form a larger drop. if the capacity of each smaller drop is C then find the capacity and potential to larger drop

Discussion

1446.	When water solidifies to ice.What happens to heat?
Answer» When water solidifies to ice.What happens to heat?

Discussion

1447.	83.5xWhen dil. HNO3 is electrolysed)H2(g) is formed at anode(2) 02 gas is formed at anode(3) NO2 is formed at anode14) N2 is formed at anode
Answer» 83.5xWhen dil. HNO3 is electrolysed)H2(g) is formed at anode(2) 02 gas is formed at anode(3) NO2 is formed at anode14) N2 is formed at anode

Discussion

1448.	____ is the fundamental particle that is not present in the nucleus of a hydrogen atom.
Answer» ____ is the fundamental particle that is not present in the nucleus of a hydrogen atom.

Discussion

1449.	8.Stabality order of +1 states of Boron family is with respect to Ga , In , Tl is
Answer» 8.Stabality order of +1 states of Boron family is with respect to Ga , In , Tl is

Discussion

1450.

Column A has name of few fibres and column B contains types of fibres.Match column A with column B. COLUMN ACOLUMN B1) CottonA) Natural Fibres2) PolyesterB) Synthetic Fibre3) Wool4) Rayon5) Nylon

Answer»

Column A has name of few fibres and column B contains types of fibres.

Match column A with column B.

\begin{matrix} C O L U M N A & C O L U M N B 1) C o t t o n & A) N a t u r a l F i b r e s 2) P o l y e s t e r & B) S y n t h e t i c F i b r e 3) W o o l 4) R a y o n 5) N y l o n \end{matrix}

Discussion

Explore topic-wise InterviewSolutions in .

The least reactive metal among the following is: (a) magnesium (b) lead (c) silver (d) sodium

Tungsten metal is used for making the filaments of electrical bulbs because:

You are holidaying on the beautiful but hot Thar desert. Which of the following would happen in your body in response to the environmental temperature?

compound that can only act as oxidizing agent is 1) HCIO_4 2) HCIO_3 3) HCIO_{} 4) HCIO

The flame of a candle is always upright due to ___________.

Question 1Among Zinc, Phosphorus, Sulpher and Oxygen which can be beaten into thin sheets?

When dilute sulphuric acid is added to granulated zinc placed in a test-tube, the observation made is :(1) the surface of the metal turns shiny(2) the reaction mixture turns milky(3) odour of sulphur dioxide is observed(4) a colourless and odourless gas evolves with bubbles

Some amines are shown below

39.Two isolated large metal plates are charged to charge densities +sigma and - sigma respectively. Now they are brought together to form a parallel plate capcitor. Electrostatic pressure experienced by each of the plates is_

Which among the following has a cyclic structure made up of carbon skeletal?

Question 9Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from the synthetic material? Advise Rana, giving your reason.

Define one atomic mass

When do we use the term "excess air"?

A boy poured honey into a bowl, he tried to break the flow of honey with his fingers but found it difficult, which of the following may be the reason?

Who believed that all kinds of matter are made up of only 4 elements?

How NaAlO2 formula formed

Define the law of conservation of mass.

Name the petroleum product used for surfacing roads.​

Exception of Metals and Non metals

What is the petroleum product used for aviation purposes and can petrol be used for this?

In all metals like iron all atoms are attached to each other or not?

What is dark zone, luminous zone and non - luminous zone?

Write down the names of compounds represented by the following formulae: (v) CaCO3

Reaction NamesReactionsiDisplacement reactionACaO+O2→2Ca(OH)2iiDecomposition ReactionBFe+Pb(NO3)2→Fe(NO3)2+PbiiiRedox ReactionCMgCl2+Ca(OH)2→Mg(OH)2+CaCl2ivCombination ReactionDKClO3→2KCl+3O2vDouble Displacement ReactionECO2+H2→2CO+H2O

Difference of displacement reaction and percipitation reaction?(tabular form)

Which of the following is an electrophilic agent?

Question 10What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?

Differentiate between evaporation and boiling. [3 MARKS]

What will happen to its boiling point If you add impurities to water?

If 49g of Sodium Chloride is added to 1000g of water. What is the concentration of the solution at room temperature?

The garden furniture generally has 'thermoplastics' written on it, what does this mean?

55 Balance the equation by oxidation no. method. MnO4 -- + Br- this give us Mn2+ + Br2

19.A solution of Al2(SO4)3 {d=1.253} contain 22℅ salt by weight. The molarity normality, molalit of solution is?

When sodium chloride dissolve in water, sodium chloride dissociates into Sodium and chlorine then why sodium does not react with water to form sodium hydroxide?

A chemical compound having smell of chlorine is used to remove yellowness of white clothes in laundries. Name the compound and write the chemical equation involved in its preparation. [2 MARKS]

97. In a bohr's model of an atom, when an electron jump from n=1 to n=3, how much energy will be emitted or absorbed?

9.033×1023 atoms of hydrogen is equal to:

Question 2 (b) Fill in the blank: A liquid fuel used in homes is ___.

State the law of conservation of mass. Give one example to illustrate this law.

Which of the following best describes gas?

two uniform charged spherical drops each at a potential V coalesce to form a larger drop. if the capacity of each smaller drop is C then find the capacity and potential to larger drop

When water solidifies to ice.What happens to heat?

83.5xWhen dil. HNO3 is electrolysed)H2(g) is formed at anode(2) 02 gas is formed at anode(3) NO2 is formed at anode14) N2 is formed at anode

____ is the fundamental particle that is not present in the nucleus of a hydrogen atom.

8.Stabality order of +1 states of Boron family is with respect to Ga , In , Tl is

Column A has name of few fibres and column B contains types of fibres.Match column A with column B. COLUMN ACOLUMN B1) CottonA) Natural Fibres2) PolyesterB) Synthetic Fibre3) Wool4) Rayon5) Nylon

Name the petroleum product used for surfacing roads.