7248 + Interview Questions in Chemistry Page 104 InterviewSolution

5151.	Identify the verb which indicates the tense of the sentence. The waiter will be arriving with the menu shortly.
Answer» Identify the verb which indicates the tense of the sentence. The waiter will be arriving with the menu shortly.

5151.

Identify the verb which indicates the tense of the sentence. The waiter will be arriving with the menu shortly.

Answer»

Identify the verb which indicates the tense of the sentence.

The waiter will be arriving with the menu shortly.

5152.	A reaction in which heat is released along with the formation of products is called a/an ___ reaction.
Answer» A reaction in which heat is released along with the formation of products is called a/an ___ reaction.

Discussion

5153.	Differentiate between a metal oxide and a metal hydroxide
Answer» Differentiate between a metal oxide and a metal hydroxide

Discussion

5154.	Difference between heating and boiling
Answer» Difference between heating and boiling

Discussion

5155.	(a) What is petroleum ? Where does petroleum occur ? (b) Describe the process of formation of petroleum.
Answer» (a) What is petroleum ? Where does petroleum occur ? (b) Describe the process of formation of petroleum.

5155.

(a) What is petroleum ? Where does petroleum occur ? (b) Describe the process of formation of petroleum.

Answer»

(a) What is petroleum ? Where does petroleum occur ?

(b) Describe the process of formation of petroleum.

Discussion

5156.	Question 7 Which of the following is not true for fertilizers? (a) They increase the yield. (b) Their excessive use disturbs the balance of nutrients in soil. (c) They are generally used in small quantity. (d) They are environment friendly.
Answer» Question 7 Which of the following is not true for fertilizers? (a) They increase the yield. (b) Their excessive use disturbs the balance of nutrients in soil. (c) They are generally used in small quantity. (d) They are environment friendly.

Discussion

5157.	What would happen to the liquids when we heat them, below its boiling point?
Answer» What would happen to the liquids when we heat them, below its boiling point?

Discussion

5158.	Write the chemical name of the following and also give their molecular formulae : (a) Banking soda (b) Vinegar (c) Marble (d) Sand
Answer» Write the chemical name of the following and also give their molecular formulae : (a) Banking soda (b) Vinegar (c) Marble (d) Sand

5158.

Write the chemical name of the following and also give their molecular formulae : (a) Banking soda (b) Vinegar (c) Marble (d) Sand

Answer»

Write the chemical name of the following and also give their molecular formulae :

(a) Banking soda

(b) Vinegar

(c) Marble

(d) Sand

Discussion

5159.	How the coal tar is used for perfumes, but you said that it gets unpleasant or very bad smell?
Answer» How the coal tar is used for perfumes, but you said that it gets unpleasant or very bad smell?

Discussion

5160.	State any two physical properties for believing that aluminium is a metal.
Answer» State any two physical properties for believing that aluminium is a metal.

Discussion

5161.	Pb(s) + CuSO4(aq) → PbSO4(aq) + Cu(s) The above reaction is _______ reaction.
Answer» Pb_(s)+ CuSO_4(aq)→ PbSO_4(aq) + Cu_(s) The above reaction is _______ reaction.

5161.

Pb(s) + CuSO4(aq) → PbSO4(aq) + Cu(s) The above reaction is _______ reaction.

Answer»

Pb_(s)+ CuSO_4(aq)→ PbSO_4(aq) + Cu_(s)

The above reaction is _______ reaction.

Discussion

5162.

Match the entries of column I with column II Polymer Uses (a) Polyvinyl chloride (i) Used to manufacture unbreakable crockery (b) Polythene (ii) Used for insulation of electrical wires (c) Bakelite (iii) Used to manufacture food packets (d) Melamine (iv) Used to manufacture electrical switches

Answer»

Match the entries of column I with column II

Polymer	Uses
(a) Polyvinyl chloride	(i) Used to manufacture unbreakable crockery
(b) Polythene	(ii) Used for insulation of electrical wires
(c) Bakelite	(iii) Used to manufacture food packets
(d) Melamine	(iv) Used to manufacture electrical switches

Discussion

5163.	In which of the following equipment do we use solar cells?
Answer» In which of the following equipment do we use solar cells?

Discussion

5164.	Teacher asked Ravi to select the best fuel among all these fuels- CNG, coal, petrol and water. Which one do you think should be chosen?
Answer» Teacher asked Ravi to select the best fuel among all these fuels- CNG, coal, petrol and water. Which one do you think should be chosen?

Discussion

5165.	Calorific value of wood is 18,000kJ . How much of wood is required to produce heat energy of 108,000kJ ?
Answer» Calorific value of wood is 18,000kJ . How much of wood is required to produce heat energy of 108,000kJ ?

Discussion

5166.	Which of the following are used in producing printing ink, black shoe polish and black paint?
Answer» Which of the following are used in producing printing ink, black shoe polish and black paint?

Discussion

5167.	Sulphur element is said to be : (a) ductile (b) hard (c) malleable (d) brittle
Answer» Sulphur element is said to be : (a) ductile (b) hard (c) malleable (d) brittle

5167.

Sulphur element is said to be : (a) ductile (b) hard (c) malleable (d) brittle

Answer»

Sulphur element is said to be :

(a) ductile

(b) hard

(c) malleable

(d) brittle

Discussion

5168.	What happens to atomic masses in a chemical reaction where electrons are transferred or shared?
Answer» What happens to atomic masses in a chemical reaction where electrons are transferred or shared?

Discussion

5169.	Among the fuels like Wood, Coal, Petrol or Cooking gas, which of the following is a common substance that burns?
Answer» Among the fuels like Wood, Coal, Petrol or Cooking gas, which of the following is a common substance that burns?

Discussion

5170.	Breaking a graphite tip of a pencil might be little tough but peeling or sharpening pencil tips is quite easy. Could you identify why?
Answer» Breaking a graphite tip of a pencil might be little tough but peeling or sharpening pencil tips is quite easy. Could you identify why?

Discussion

5171.	H2(g)+V2O5(s)→V2O3(s)+H2O(l) Let the coefficients for the given reaction be as follows: aH2(g)+bV2O5(s)→cV2O3(s)+dH2O(l) What will be the equations for the number of atoms for each element, so that each is balanced?
Answer» $H_{2} (g) + V_{2} O_{5} (s) \to V_{2} O_{3} (s) + H_{2} O (l)$ Let the coefficients for the given reaction be as follows: $a H_{2} (g) + b V_{2} O_{5} (s) \to c V_{2} O_{3} (s) + d H_{2} O (l)$ What will be the equations for the number of atoms for each element, so that each is balanced?

Discussion

5172.	Why it is not advisable to use aluminum polish on anodized surfaces?
Answer» Why it is not advisable to use aluminum polish on anodized surfaces?

Discussion

5173.	What would happen if sodium and potassium are kept in open air? [3 MARKS]
Answer» What would happen if sodium and potassium are kept in open air? [3 MARKS]

Discussion

5174.	The specific conductance of a saturated solution of AgCl at 25∘ C is 3.55×10−6 Ω−1 cm−1 and that of water used for preparing the solution is 1.60×10−6 Ω−1cm−1. What is the solubility product of AgCl? (Λ∞(AgCl)=150.0 Ω−1cm2eqv−1)
Answer» The specific conductance of a saturated solution of $A g C l$ at $25^{\circ} C$ is $3.55 \times 10^{- 6} Ω^{- 1} c m^{- 1}$ and that of water used for preparing the solution is $1.60 \times 10^{- 6} Ω^{- 1} c m^{- 1}$ . What is the solubility product of AgCl? $(Λ^{\infty} (A g C l) = 150.0 Ω^{- 1} c m^{2} {eqv}^{- 1})$

Discussion

5175.	Name three chemicals made from common salt or Sodium Chloride.
Answer» Name three chemicals made from common salt or Sodium Chloride.

Discussion

5176.	What are the various types of plastics? Give two examples of each type of plastics.
Answer» What are the various types of plastics? Give two examples of each type of plastics.

Discussion

5177.	(a) What are thermoplastics ? Give two examples of thermoplastics. (b) What are thermosetting plastics? Give two examples of thermosetting plastics.
Answer» (a) What are thermoplastics ? Give two examples of thermoplastics. (b) What are thermosetting plastics? Give two examples of thermosetting plastics.

5177.

(a) What are thermoplastics ? Give two examples of thermoplastics. (b) What are thermosetting plastics? Give two examples of thermosetting plastics.

Answer»

(a) What are thermoplastics ? Give two examples of thermoplastics.

(b) What are thermosetting plastics? Give two examples of thermosetting plastics.

Discussion

5178.	Iron nails were dipped in a solution kept in a test tube. After half an hour, it was observed that the colour of the solution has changed. This change of colour is due to the formation of :
Answer» Iron nails were dipped in a solution kept in a test tube. After half an hour, it was observed that the colour of the solution has changed. This change of colour is due to the formation of :

Discussion

5179.	If two persons are pulling a box in the same direction with 85 N and 65 N force and the net displacement of the box is 18m., find the net work done.
Answer» If two persons are pulling a box in the same direction with 85 N and 65 N force and the net displacement of the box is 18m., find the net work done.

Discussion

5180.	Explain that life depends on plants ?
Answer» Explain that life depends on plants ?

Discussion

5181.	Calculate the molecular mass of water.18
Answer» Calculate the molecular mass of water. 18

Discussion

5182.	Name a non-metal which is in liquid state at room temperature.
Answer» Name a non-metal which is in liquid state at room temperature.

Discussion

5183.	Element Na (Sodium) can be called as__________.
Answer» Element Na (Sodium) can be called as__________.

Discussion

5184.	What is fractional crystallization ?
Answer» What is fractional crystallization ?

Discussion

5185.	Which of the following is not true?
Answer» Which of the following is not true?

Discussion

5186.	An electron has a:
Answer» An electron has a:

Discussion

5187.	Venturimeter is a device used to measure the
Answer» Venturimeter is a device used to measure the

Discussion

5188.	Dihydrogen under certain reaction conditions combines with all elements except:
Answer» Dihydrogen under certain reaction conditions combines with all elements except:

Discussion

5189.	What does PCRA stand for?
Answer» What does PCRA stand for?

Discussion

5190.	Give examples for solid fuels. What are some disadvantages of solid fuel?
Answer» Give examples for solid fuels. What are some disadvantages of solid fuel?

Discussion

5191.	The following reaction is a/an – C(s)+O2(g)→CO2(g)+Heat
Answer» The following reaction is a/an – $C (s) + O_{2} (g) \to C O_{2} (g) + H e a t$

Discussion

5192.	Which of the following metals on reacting with oxygen forms an amphoteric oxide?
Answer» Which of the following metals on reacting with oxygen forms an amphoteric oxide?

Discussion

5193.	The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is:-
Answer» The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is:-

Discussion

5194.	Which among the following was not used by the Egyptians to make a fabric?
Answer» Which among the following was not used by the Egyptians to make a fabric?

Discussion

5195.	Metals in their pure state, have a shiny surface. What is this property of ther known as?
Answer» Metals in their pure state, have a shiny surface. What is this property of ther known as?

Discussion

5196.	When steam is passed over red hot coke, what is produced?
Answer» When steam is passed over red hot coke, what is produced?

Discussion

5197.	Which of the following is not a property of ideal fuel?
Answer» Which of the following is not a property of ideal fuel?

Discussion

5198.	Which scientist was awarded the Noble Prize for the discovery of neutrons?
Answer» Which scientist was awarded the Noble Prize for the discovery of neutrons?

Discussion

5199.	Which of the following is a property of plastics?
Answer» Which of the following is a property of plastics?

Discussion

5200.	What are the necessary conditions for a fire to start? How can the fire be put off if required? [5 MARKS]
Answer» What are the necessary conditions for a fire to start? How can the fire be put off if required? [5 MARKS]

Discussion

Explore topic-wise InterviewSolutions in .

Identify the verb which indicates the tense of the sentence. The waiter will be arriving with the menu shortly.

A reaction in which heat is released along with the formation of products is called a/an ___ reaction.

Differentiate between a metal oxide and a metal hydroxide

Difference between heating and boiling

(a) What is petroleum ? Where does petroleum occur ? (b) Describe the process of formation of petroleum.

Question 7 Which of the following is not true for fertilizers? (a) They increase the yield. (b) Their excessive use disturbs the balance of nutrients in soil. (c) They are generally used in small quantity. (d) They are environment friendly.

What would happen to the liquids when we heat them, below its boiling point?

Write the chemical name of the following and also give their molecular formulae : (a) Banking soda (b) Vinegar (c) Marble (d) Sand

How the coal tar is used for perfumes, but you said that it gets unpleasant or very bad smell? ​​​​​​

State any two physical properties for believing that aluminium is a metal.

Pb(s) + CuSO4(aq) → PbSO4(aq) + Cu(s) The above reaction is _______ reaction.

Match the entries of column I with column II Polymer Uses (a) Polyvinyl chloride (i) Used to manufacture unbreakable crockery (b) Polythene (ii) Used for insulation of electrical wires (c) Bakelite (iii) Used to manufacture food packets (d) Melamine (iv) Used to manufacture electrical switches

In which of the following equipment do we use solar cells?

Teacher asked Ravi to select the best fuel among all these fuels- CNG, coal, petrol and water. Which one do you think should be chosen?

Calorific value of wood is 18,000kJ . How much of wood is required to produce heat energy of 108,000kJ ?

Which of the following are used in producing printing ink, black shoe polish and black paint?

Sulphur element is said to be : (a) ductile (b) hard (c) malleable (d) brittle

What happens to atomic masses in a chemical reaction where electrons are transferred or shared?

Among the fuels like Wood, Coal, Petrol or Cooking gas, which of the following is a common substance that burns?

Breaking a graphite tip of a pencil might be little tough but peeling or sharpening pencil tips is quite easy. Could you identify why?

H2(g)+V2O5(s)→V2O3(s)+H2O(l) Let the coefficients for the given reaction be as follows: aH2(g)+bV2O5(s)→cV2O3(s)+dH2O(l) What will be the equations for the number of atoms for each element, so that each is balanced?

Why it is not advisable to use aluminum polish on anodized surfaces?

What would happen if sodium and potassium are kept in open air? [3 MARKS]

The specific conductance of a saturated solution of AgCl at 25∘ C is 3.55×10−6 Ω−1 cm−1 and that of water used for preparing the solution is 1.60×10−6 Ω−1cm−1. What is the solubility product of AgCl? (Λ∞(AgCl)=150.0 Ω−1cm2eqv−1)

Name three chemicals made from common salt or Sodium Chloride.

What are the various types of plastics? Give two examples of each type of plastics.

(a) What are thermoplastics ? Give two examples of thermoplastics. (b) What are thermosetting plastics? Give two examples of thermosetting plastics.

Iron nails were dipped in a solution kept in a test tube. After half an hour, it was observed that the colour of the solution has changed. This change of colour is due to the formation of :

If two persons are pulling a box in the same direction with 85 N and 65 N force and the net displacement of the box is 18m., find the net work done.

Explain that life depends on plants ?

Calculate the molecular mass of water.18

Name a non-metal which is in liquid state at room temperature.

Element Na (Sodium) can be called as__________.

What is fractional crystallization ?

Which of the following is not true?

An electron has a:

Venturimeter is a device used to measure the

Dihydrogen under certain reaction conditions combines with all elements except:

What does PCRA stand for?

Give examples for solid fuels. What are some disadvantages of solid fuel?

The following reaction is a/an – C(s)+O2(g)→CO2(g)+Heat

Which of the following metals on reacting with oxygen forms an amphoteric oxide?

The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is:-

Which among the following was not used by the Egyptians to make a fabric?

Metals in their pure state, have a shiny surface. What is this property of ther known as?

When steam is passed over red hot coke, what is produced?

Which of the following is not a property of ideal fuel?

Which scientist was awarded the Noble Prize for the discovery of neutrons?

Which of the following is a property of plastics?

What are the necessary conditions for a fire to start? How can the fire be put off if required? [5 MARKS]

How the coal tar is used for perfumes, but you said that it gets unpleasant or very bad smell?