The best and the poorest conductors of heat are respectively

• silver (Ag) and lead (Pb)

• copper (Cu) and aluminium (Al)

• silver (Ag) and gold (Au)

• copper (Cu) and gold (Au)

Which one among the following metals is more reactive than hydrogen?

• Mercury

• Copper

• Silver

• Tin

The number of neutrons in ₁₃AF²⁷ is

• 40

• 27

• 14

• 13

Match the List I with List II, III, and IV.

List I (Elements)

1. Diamond
2. Graphite
3. Rayon
4. Nylon
5. Carbon fiber
6. Polyvinyl chloride
7. Terylene
8. Bakelite

List II (Property)

1. Thermosetting Polymer
2. Monomer
3. Soft
4. Viscose process
5. Synthetic fibre
6. High strength
7. Thermoplastic
8. Polyester fiber
9. Hardest Natural substance

List III (Property/Composition)

1. Rigid structure
2. Sheet-like structure
3. Cellulose
4. Soft on heating
5. Unreactive
6. Corrosion
7. Melts instead of burning
8. Ethylene glycol
9. Phenol and formaldehyde

List IV (Property/Composition)

1. Non-conductor of heat
2. Ester
3. Conductor of heat
4. Ether
5. Silk-like thread
6. Spacecraft
7. Chlorine atom replaces a hydrogen atom
8. Cross-linked
9. Terephthalic acid

• List I - (a)

  List II - 9

  List III - I

  List IV - i

• List I - (b)

  List II - 3

  List III - IV

  List IV - iv

• List I - (a)

  List II - 9

  List III - I

  List IV - ii

• List I - (b)

  List II - 3

  List III - II

  List IV - v

Match the List I with List II, III and IV.

List I (Elements)

1. Diamond
2. Graphite
3. Rayon
4. Nylon
5. Carbon fiber
6. Polyvinyl chloride
7. Terylene
8. Bakelite

List II (Property)

1. Thermosetting Polymer
2. Monomer
3. Soft
4. Viscose process
5. Synthetic fibre
6. High strength
7. Thermoplastic
8. Polyester fiber
9. Hardest Natural substance

List III (Property/Composition)

1. Rigid structure
2. Sheet-like structure
3. Cellulose
4. Soft on heating
5. Unreactive
6. Corrosion
7. Melts instead of burning
8. Ethylene glycol
9. Phenol and formaldehyde

List IV (Property/Composition)

1. Non-conductor of heat
2. Ester
3. Conductor of heat
4. Ether
5. Silk-like thread
6. Spacecraft
7. Chlorine atom replaces a hydrogen atom
8. Cross-linked
9. Terephthalic acid

• List I - (c)

  List II - 4

  List III - II

  List IV - i

• List I - (d)

  List II - 5

  List III - VII

  List IV - v

• List I - (c)

  List II - 6

  List III - V

  List IV - vi

• List I - (d)

  List II - 5

  List III - II

  List IV - iv

Match the List I with List II, III and IV.

List I (Elements)

1. Diamond
2. Graphite
3. Rayon
4. Nylon
5. Carbon fiber
6. Polyvinyl chloride
7. Terylene
8. Bakelite

List II (Property)

1. Thermosetting Polymer
2. Monomer
3. Soft
4. Viscose process
5. Synthetic fibre
6. High strength
7. Thermoplastic
8. Polyester fiber
9. Hardest Natural substance

List III (Property/Composition)

1. Rigid structure
2. Sheet-like structure
3. Cellulose
4. Soft on heating
5. Unreactive
6. Corrosion
7. Melts instead of burning
8. Ethylene glycol
9. Phenol and formaldehyde

List IV (Property/Composition)

1. Non-conductor of heat
2. Ester
3. Conductor of heat
4. Ether
5. Silk-like thread
6. Spacecraft
7. Chlorine atom replaces a hydrogen atom
8. Cross-linked
9. Terephthalic acid

• List I - (e)

  List II - 6

  List III - I

  List IV - vi

• List I - (f)

  List II - 7

  List III - VI

  List IV - ix

• List I - (e)

  List II - 6

  List III - VI

  List IV - vi

• List I - (f)

  List II - 3

  List III - VI

  List IV - v

Match the List I with List II, III and IV.

List I (Elements)

1. Diamond
2. Graphite
3. Rayon
4. Nylon
5. Carbon fiber
6. Polyvinyl chloride
7. Terylene
8. Bakelite

List II (Property)

1. Thermosetting Polymer
2. Monomer
3. Soft
4. Viscose process
5. Synthetic fibre
6. High strength
7. Thermoplastic
8. Polyester fiber
9. Hardest Natural substance

List III (Property/Composition)

1. Rigid structure
2. Sheet-like structure
3. Cellulose
4. Soft on heating
5. Unreactive
6. Corrosion
7. Melts instead of burning
8. Ethylene glycol
9. Phenol and formaldehyde

List IV (Property/Composition)

1. Non-conductor of heat
2. Ester
3. Conductor of heat
4. Ether
5. Silk-like thread
6. Spacecraft
7. Chlorine atom replaces a hydrogen atom
8. Cross-linked
9. Terephthalic acid

• List I - (g)

  List II - 8

  List III - I

  List IV - ix

• List I - (h)

  List II - 4

  List III - IV

  List IV - iii

• List I - (g)

  List II - 8

  List III - VIII

  List IV - ix

• List I - (h)

  List II - 1

  List III - VI

  List IV - viii

Which one of the following is a transition metal?

• Aluminium (Al)

• Manganese (Mn)

• Magnesium (Mg)

• Calcium (Ca)

239.

Which one of the following gases, present in the air near the surface of the Earth, has maximum concentration?

• Oxygen (O₂)

• Hydrogen (H₂)

• Nitrogen (N₂)

• Methane (CH₄)

Which one of the following elements will replace hydrogen from acids to form salts?

• Sulphur (S)

• Silicon (Si)

• Zinc (Zn)

• Phosphorus (P)