15280 + Interview Questions in Chemistry Page 248 InterviewSolution

12351.	what is the percantage of solar energy trapped and utilised?
Answer» what is the percantage of solar energy trapped and utilised?

Discussion

12352.	Why does carbon form compounds by covalent bonding ?
Answer» Why does carbon form compounds by covalent bonding ?

Discussion

12353.	Draw the structures for the following compounds : (a) Ethanoic acid (b) Propanoic acid
Answer» Draw the structures for the following compounds : (a) Ethanoic acid (b) Propanoic acid

Discussion

12354.	What are the physical properties of an ionic compounds? [5 MARKS]
Answer» What are the physical properties of an ionic compounds? [5 MARKS]

Discussion

12355.	Infinite increase in demand at an even slightly lower price change and no demand at all at an even slightly higher price change indicates which type of elasticity of demand?
Answer» Infinite increase in demand at an even slightly lower price change and no demand at all at an even slightly higher price change indicates which type of elasticity of demand?

Discussion

12356.	Calamine ore can be used to extract one of the following metals. This metal is: (a) copper (b) mercury (c) aluminium (d) zinc
Answer» Calamine ore can be used to extract one of the following metals. This metal is: (a) copper (b) mercury (c) aluminium (d) zinc

Discussion

12357.	(a) What is a balanced chemical equation ? Why should chemical equations be balanced ? (b) Aluminium burns is chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reation. (c) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. Write a balanced chemical equation for this reaction.
Answer» (a) What is a balanced chemical equation ? Why should chemical equations be balanced ? (b) Aluminium burns is chlorine to form aluminium chloride $(A l C l_{3})$ . Write a balanced chemical equation for this reation. (c) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. Write a balanced chemical equation for this reaction.

12357.

(a) What is a balanced chemical equation ? Why should chemical equations be balanced ? (b) Aluminium burns is chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reation. (c) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. Write a balanced chemical equation for this reaction.

Answer»

(a) What is a balanced chemical equation ? Why should chemical equations be balanced ?

(b) Aluminium burns is chlorine to form aluminium chloride $(A l C l_{3})$ . Write a balanced chemical equation for this reation.

(c) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. Write a balanced chemical equation for this reaction.

Discussion

12358.	Which of the following is true about the atomicity of sulphur?
Answer» Which of the following is true about the atomicity of sulphur?

Discussion

12359.	Question 10 Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved? (i) Displacement reaction (ii) Precipitation reaction (iii) Combination reaction (iv) Double displacement reaction (a) (i) only (b) (ii) only (c) (iv) only (d) (ii) and (iv)
Answer» Question 10 Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved? (i) Displacement reaction (ii) Precipitation reaction (iii) Combination reaction (iv) Double displacement reaction (a) (i) only (b) (ii) only (c) (iv) only (d) (ii) and (iv)

12359.

Question 10 Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved? (i) Displacement reaction (ii) Precipitation reaction (iii) Combination reaction (iv) Double displacement reaction (a) (i) only (b) (ii) only (c) (iv) only (d) (ii) and (iv)

Answer»

Question 10

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?

(i) Displacement reaction
(ii) Precipitation reaction
(iii) Combination reaction
(iv) Double displacement reaction

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

Discussion

12360.	Which of the following is not the crystalline allotropic form of carbon?
Answer» Which of the following is not the crystalline allotropic form of carbon?

Discussion

12361.	Which is the correct order for ionic radii?
Answer» Which is the correct order for ionic radii?

Discussion

12362.	3 beakers are kept in a laboratory and ammonical silver nitrate is added What will be the colour change in each beaker respectively:
Answer» 3 beakers are kept in a laboratory and ammonical silver nitrate is added What will be the colour change in each beaker respectively:

12362.

3 beakers are kept in a laboratory and ammonical silver nitrate is added What will be the colour change in each beaker respectively:

Answer»

3 beakers are kept in a laboratory and ammonical silver nitrate is added

What will be the colour change in each beaker respectively:

Discussion

12363.	Which one of the following element is the most electronegative?
Answer» Which one of the following element is the most electronegative?

12363.

Which one of the following element is the most electronegative?

Answer»

Which one of the following element is the most electronegative?

Discussion

12364.	An element 'A' has two electrons in the outermost shell of its atom and combines with an element 'B' having seven electrons in the outermost shell, forming the compound AB2. The compound when dissolved in water, conduct electric current. Giving reasons, state the nature of the chemical bond in the compound.
Answer» An element 'A' has two electrons in the outermost shell of its atom and combines with an element 'B' having seven electrons in the outermost shell, forming the compound $A B_{2}$ . The compound when dissolved in water, conduct electric current. Giving reasons, state the nature of the chemical bond in the compound.

Discussion

12365.	Study the given figure and answer the following questions: [4 MARKS] (a) What does the given image represent? (b) Write two effects of it. (c) How is it formed in the image?
Answer» Study the given figure and answer the following questions: [4 MARKS] (a) What does the given image represent? (b) Write two effects of it. (c) How is it formed in the image?

Discussion

12366.	Which of the following quantum number set is impossible:
Answer» Which of the following quantum number set is impossible:

Discussion

12367.	Give balanced equations when: (a) ethene is burnt in excess of oxygen. (b) ethene reacts with chlorine. (c) ethene combines with hydrogen chloride. (d) a mixture of ethene and hydrogen is passed over nickel at 200∘C. [4 MARKS]
Answer» Give balanced equations when: (a) ethene is burnt in excess of oxygen. (b) ethene reacts with chlorine. (c) ethene combines with hydrogen chloride. (d) a mixture of ethene and hydrogen is passed over nickel at $200^{\circ}$ C. [4 MARKS]

Discussion

12368.	What are the methods used for making alloys?
Answer» What are the methods used for making alloys?

Discussion

12369.	Complete the reaction : Pb(NO3)2+2HCl→PbCl2+2
Answer» Complete the reaction : $P b (N O_{3})_{2} + 2 H C l \to P b C l_{2} + 2$

Discussion

12370.	Question 9(b) Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is (b) strongly alkaline? Arrange the pH in increasing order of hydrogen-ion concentration.
Answer» Question 9(b) Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is (b) strongly alkaline? Arrange the pH in increasing order of hydrogen-ion concentration.

Discussion

12371.	Aluminium's reactivity decreases when dipped in HNO3
Answer» Aluminium's reactivity decreases when dipped in HNO₃

Discussion

12372.	What is the formal charge of C in CO?
Answer» What is the formal charge of C in CO?

Discussion

12373.	In an accident at a factory, some nitric acid was spilt. Which substance, when added to excess would neutralise the acid without leaving an alkaline solution?
Answer» In an accident at a factory, some nitric acid was spilt. Which substance, when added to excess would neutralise the acid without leaving an alkaline solution?

Discussion

12374.	Can the following groups of elements be classified as Dobereiner’s triads? (a) Na, Si, Cl (b) Be, Mg, Ca Give the reason for your answer. (Atomic masses : Be = 9; Na = 23; Mg = 24 ; Si = 28 ; Cl = 35.5; Ca = 40)
Answer» Can the following groups of elements be classified as Dobereiner’s triads? (a) Na, Si, Cl (b) Be, Mg, Ca Give the reason for your answer. (Atomic masses : Be = 9; Na = 23; Mg = 24 ; Si = 28 ; Cl = 35.5; Ca = 40)

12374.

Can the following groups of elements be classified as Dobereiner’s triads? (a) Na, Si, Cl (b) Be, Mg, Ca Give the reason for your answer. (Atomic masses : Be = 9; Na = 23; Mg = 24 ; Si = 28 ; Cl = 35.5; Ca = 40)

Answer»

Can the following groups of elements be classified as Dobereiner’s triads?

(a) Na, Si, Cl (b) Be, Mg, Ca

Give the reason for your answer.

(Atomic masses : Be = 9; Na = 23; Mg = 24 ; Si = 28 ; Cl = 35.5; Ca = 40)

Discussion

12375.	Shape of the molecule having sp hybridization is:
Answer» Shape of the molecule having sp hybridization is:

Discussion

12376.	Name three compounds formed by ethylene and give one use of each compound.
Answer» Name three compounds formed by ethylene and give one use of each compound.

Discussion

12377.	The element 'M' has an atomic number 11. (a) What is it's electronic configuration? (b) Which group does 'M' belong to? (c) Is 'M' a metal or a non-metal? (d) Write the formula of its chloride.
Answer» The element 'M' has an atomic number 11. (a) What is it's electronic configuration? (b) Which group does 'M' belong to? (c) Is 'M' a metal or a non-metal? (d) Write the formula of its chloride.

12377.

The element 'M' has an atomic number 11. (a) What is it's electronic configuration? (b) Which group does 'M' belong to? (c) Is 'M' a metal or a non-metal? (d) Write the formula of its chloride.

Answer»

The element 'M' has an atomic number 11.

(a) What is it's electronic configuration?
(b) Which group does 'M' belong to?
(c) Is 'M' a metal or a non-metal?
(d) Write the formula of its chloride.

Discussion

12378.	The modern periodic table was prepared by : (a) Dobereiner (b) Newlands (c) Bohr (d) Mendeleev
Answer» The modern periodic table was prepared by : (a) Dobereiner (b) Newlands (c) Bohr (d) Mendeleev

12378.

The modern periodic table was prepared by : (a) Dobereiner (b) Newlands (c) Bohr (d) Mendeleev

Answer»

The modern periodic table was prepared by :

(a) Dobereiner (b) Newlands (c) Bohr (d) Mendeleev

Discussion

12379.	I am saloni i have a doubt in chemistry. for example ammonium formula NH4+ here +1 is valancy but what is 4 here mean .
Answer» I am saloni i have a doubt in chemistry. for example ammonium formula NH4+ here +1 is valancy but what is 4 here mean .

Discussion

12380.	A metal Nitrate 'A' on heating gives yellowish brown coloured metal oxide along with brown gas 'B' and a colourless gas 'C'. Aqueous solution of 'A' on reaction with potassium iodide forms a yollow precipitate of compound 'D'.Identify A,B,C,D.Also identify the type of both the reactions.
Answer» A metal Nitrate 'A' on heating gives yellowish brown coloured metal oxide along with brown gas 'B' and a colourless gas 'C'. Aqueous solution of 'A' on reaction with potassium iodide forms a yollow precipitate of compound 'D'.Identify A,B,C,D.Also identify the type of both the reactions.

Discussion

12381.	The removal of oxygen from a substance is called : (a) oxidation (b) corrosion (c) reduction (d) rancidity
Answer» The removal of oxygen from a substance is called : (a) oxidation (b) corrosion (c) reduction (d) rancidity

12381.

The removal of oxygen from a substance is called : (a) oxidation (b) corrosion (c) reduction (d) rancidity

Answer»

The removal of oxygen from a substance is called :

(a) oxidation (b) corrosion (c) reduction (d) rancidity

Discussion

12382.	Distinguish between electrolytic methods of reduction and refining.
Answer» Distinguish between electrolytic methods of reduction and refining.

Discussion

12383.	Information in a memory that is no longer valid or wanted is called _______.
Answer» Information in a memory that is no longer valid or wanted is called _______.

Discussion

12384.	Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.
Answer» Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.

Discussion

12385.	What volume of propane is burnt for every 500cm3 of air used in the reaction under the same conditions? (Assuming oxygen is (15)th of air) C3H8+5O2→3CO2+4H2O
Answer» What volume of propane is burnt for every $500 c m^{3}$ of air used in the reaction under the same conditions? (Assuming oxygen is $(\frac{1}{5})^{t h}$ of air) $C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + 4 H_{2} O$

12385.

What volume of propane is burnt for every 500cm3 of air used in the reaction under the same conditions? (Assuming oxygen is (15)th of air) C3H8+5O2→3CO2+4H2O

Answer»

What volume of propane is burnt for every $500 c m^{3}$ of air used in the reaction under the same conditions?
(Assuming oxygen is $(\frac{1}{5})^{t h}$ of air)

$C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + 4 H_{2} O$

Discussion

12386.	Which series of carbon compounds have different number of carbon atoms but contain the same functional group.
Answer» Which series of carbon compounds have different number of carbon atoms but contain the same functional group.

Discussion

12387.	(a) What are organic acids and mineral acids ? (b) Give two examples each of organic acids and mineral acids. (c) State some of the uses of mineral acids in industry.
Answer» (a) What are organic acids and mineral acids ? (b) Give two examples each of organic acids and mineral acids. (c) State some of the uses of mineral acids in industry.

12387.

(a) What are organic acids and mineral acids ? (b) Give two examples each of organic acids and mineral acids. (c) State some of the uses of mineral acids in industry.

Answer»

(a) What are organic acids and mineral acids ?

(b) Give two examples each of organic acids and mineral acids.

(c) State some of the uses of mineral acids in industry.

Discussion

12388.	calculate the mass of iron in 10 kg of iron ore which contains 80% of pure ferric oxide
Answer» calculate the mass of iron in 10 kg of iron ore which contains 80% of pure ferric oxide

Discussion

12389.	1. What are Halogens explain with an example. 2. What are alkali metals explain with an example. 3. Write down the similarities of helium and neon.
Answer» 1. What are Halogens explain with an example. 2. What are alkali metals explain with an example. 3. Write down the similarities of helium and neon.

12389.

1. What are Halogens explain with an example. 2. What are alkali metals explain with an example. 3. Write down the similarities of helium and neon.

Answer»

1. What are Halogens explain with an example.

2. What are alkali metals explain with an example.

3. Write down the similarities of helium and neon.

Discussion

12390.	(a) Define the term 'isomers'. (b) Draw two possible isomers of the compound with molecular formula C3H6O and write their names. (c) Give the electron dot structure of the above two compounds.
Answer» (a) Define the term 'isomers'. (b) Draw two possible isomers of the compound with molecular formula $C_{3} H_{6} O$ and write their names. (c) Give the electron dot structure of the above two compounds.

12390.

(a) Define the term 'isomers'. (b) Draw two possible isomers of the compound with molecular formula C3H6O and write their names. (c) Give the electron dot structure of the above two compounds.

Answer»

(a) Define the term 'isomers'.

(b) Draw two possible isomers of the compound with molecular formula $C_{3} H_{6} O$ and write their names.

(c) Give the electron dot structure of the above two compounds.

Discussion

12391.	Identify X in the following reaction: X + Water → Base
Answer» Identify X in the following reaction: X + Water $\to$ Base

Discussion

12392.	Which of the following have an impact on solubility of a solute in a solvent?
Answer» Which of the following have an impact on solubility of a solute in a solvent?

Discussion

12393.	As per IUPAC nomenclature, the name of the complex [Co(H2O)4(NH3)2]Cl3 is
Answer» As per IUPAC nomenclature, the name of the complex $[C o (H_{2} O)_{4} (N H_{3})_{2}] C l_{3}$ is

Discussion

12394.	Which of the following options is not correct regarding a salt bridge?
Answer» Which of the following options is not correct regarding a salt bridge?

Discussion

12395.	Write the equation for the action of heat on : (a) Ammonium chloride, (b) Ammonium nitrate. State whether each reacton is an example of thermal decomposition or thermal dissociation.
Answer» Write the equation for the action of heat on : (a) Ammonium chloride, (b) Ammonium nitrate. State whether each reacton is an example of thermal decomposition or thermal dissociation.

12395.

Write the equation for the action of heat on : (a) Ammonium chloride, (b) Ammonium nitrate. State whether each reacton is an example of thermal decomposition or thermal dissociation.

Answer»

Write the equation for the action of heat on :

(a) Ammonium chloride, (b) Ammonium nitrate.

State whether each reacton is an example of thermal decomposition or thermal dissociation.

Discussion

12396.	Question 5(b) You are given a hammer, a battery, a bulb, wires and a switch. (b) Assess the usefulness of these tests in distinguishing between metals and non-metals.
Answer» Question 5(b) You are given a hammer, a battery, a bulb, wires and a switch. (b) Assess the usefulness of these tests in distinguishing between metals and non-metals.

Discussion

12397.	In a book it is written that ions in ionic compounds become free to move in aqueous solution i.e NaCl becomes Na+ and Cl- in aqueous solution and the ions become free to move. Is it true?
Answer» In a book it is written that ions in ionic compounds become free to move in aqueous solution i.e NaCl becomes Na+ and Cl- in aqueous solution and the ions become free to move. Is it true?

Discussion

12398.	Why covalent bond does not conduct electricity ?
Answer» Why covalent bond does not conduct electricity ?

Discussion

12399.	How will you prepare 100 times dilute solution from 1 ml concentrated sulphuric acid solution ? What precaution would you suggest and why ?
Answer» How will you prepare 100 times dilute solution from 1 ml concentrated sulphuric acid solution ? What precaution would you suggest and why ?

Discussion

12400.	Out of the following, which metal cannot displace hydrogen from dilute HCl or dilute H2SO4?
Answer» Out of the following, which metal cannot displace hydrogen from dilute HCl or dilute H₂SO₄?

Discussion

Explore topic-wise InterviewSolutions in .

what is the percantage of solar energy trapped and utilised?

Why does carbon form compounds by covalent bonding ?

Draw the structures for the following compounds : (a) Ethanoic acid (b) Propanoic acid

What are the physical properties of an ionic compounds? [5 MARKS]

Infinite increase in demand at an even slightly lower price change and no demand at all at an even slightly higher price change indicates which type of elasticity of demand?

Calamine ore can be used to extract one of the following metals. This metal is: (a) copper (b) mercury (c) aluminium (d) zinc

Which of the following is true about the atomicity of sulphur?

Which of the following is not the crystalline allotropic form of carbon?

Which is the correct order for ionic radii?

3 beakers are kept in a laboratory and ammonical silver nitrate is added What will be the colour change in each beaker respectively:

Which one of the following element is the most electronegative?

Study the given figure and answer the following questions: [4 MARKS] (a) What does the given image represent? (b) Write two effects of it. (c) How is it formed in the image?

Which of the following quantum number set is impossible:

Give balanced equations when: (a) ethene is burnt in excess of oxygen. (b) ethene reacts with chlorine. (c) ethene combines with hydrogen chloride. (d) a mixture of ethene and hydrogen is passed over nickel at 200∘C. [4 MARKS]

What are the methods used for making alloys?

Complete the reaction : Pb(NO3)2+2HCl→PbCl2+2

Question 9(b) Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is (b) strongly alkaline? Arrange the pH in increasing order of hydrogen-ion concentration.

Aluminium's reactivity decreases when dipped in HNO3

What is the formal charge of C in CO?

In an accident at a factory, some nitric acid was spilt. Which substance, when added to excess would neutralise the acid without leaving an alkaline solution?

Can the following groups of elements be classified as Dobereiner’s triads? (a) Na, Si, Cl (b) Be, Mg, Ca Give the reason for your answer. (Atomic masses : Be = 9; Na = 23; Mg = 24 ; Si = 28 ; Cl = 35.5; Ca = 40)

Shape of the molecule having sp hybridization is:

Name three compounds formed by ethylene and give one use of each compound.

The element 'M' has an atomic number 11. (a) What is it's electronic configuration? (b) Which group does 'M' belong to? (c) Is 'M' a metal or a non-metal? (d) Write the formula of its chloride.

The modern periodic table was prepared by : (a) Dobereiner (b) Newlands (c) Bohr (d) Mendeleev

I am saloni i have a doubt in chemistry. for example ammonium formula NH4+ here +1 is valancy but what is 4 here mean .

A metal Nitrate 'A' on heating gives yellowish brown coloured metal oxide along with brown gas 'B' and a colourless gas 'C'. Aqueous solution of 'A' on reaction with potassium iodide forms a yollow precipitate of compound 'D'.Identify A,B,C,D.Also identify the type of both the reactions.

The removal of oxygen from a substance is called : (a) oxidation (b) corrosion (c) reduction (d) rancidity

Distinguish between electrolytic methods of reduction and refining.

Information in a memory that is no longer valid or wanted is called _______.

Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.

What volume of propane is burnt for every 500cm3 of air used in the reaction under the same conditions? (Assuming oxygen is (15)th of air) C3H8+5O2→3CO2+4H2O

Which series of carbon compounds have different number of carbon atoms but contain the same functional group.

(a) What are organic acids and mineral acids ? (b) Give two examples each of organic acids and mineral acids. (c) State some of the uses of mineral acids in industry.

calculate the mass of iron in 10 kg of iron ore which contains 80% of pure ferric oxide

1. What are Halogens explain with an example. 2. What are alkali metals explain with an example. 3. Write down the similarities of helium and neon.

(a) Define the term 'isomers'. (b) Draw two possible isomers of the compound with molecular formula C3H6O and write their names. (c) Give the electron dot structure of the above two compounds.

Identify X in the following reaction: X + Water → Base

Which of the following have an impact on solubility of a solute in a solvent?

As per IUPAC nomenclature, the name of the complex [Co(H2O)4(NH3)2]Cl3 is

Which of the following options is not correct regarding a salt bridge?

Write the equation for the action of heat on : (a) Ammonium chloride, (b) Ammonium nitrate. State whether each reacton is an example of thermal decomposition or thermal dissociation.

Question 5(b) You are given a hammer, a battery, a bulb, wires and a switch. (b) Assess the usefulness of these tests in distinguishing between metals and non-metals.

In a book it is written that ions in ionic compounds become free to move in aqueous solution i.e NaCl becomes Na+ and Cl- in aqueous solution and the ions become free to move. Is it true?

Why covalent bond does not conduct electricity ?

How will you prepare 100 times dilute solution from 1 ml concentrated sulphuric acid solution ? What precaution would you suggest and why ?

Out of the following, which metal cannot displace hydrogen from dilute HCl or dilute H2SO4?