Which of the following get corroded by open air due to oxidation?
1. Iron
2. Copper
3. Zinc
4. Aluminium
Select the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1, 2 & 3
[D] 1, 2, 3 & 4

Consider the following compounds:
1. Water
2. Carbon dioxide
3. Carbon monoxide
 Which of the above is/are organic compound/compounds?
[A] 2 & 3 Only
[B] 1 Only
[C] 1, 2 & 3
[D] None

Consider the following statements about the Coalbed Methane:
1. It is called 'sweet gas' because of its lack of hydrogen sulphide
2. It contains very little heavier hydrocarbons such as propane or butane
 Which of the above statements is/are correct?
[A] 1 Only
[B] 2 Only
[C] Both 1 & 2
[D] Neither 1 nor 2

In which of the following states of matter the Interatomic or intermolecular distance is fixed?
[A] Solids
[B] Liquids
[C] Gases
[D] Both a and b

What do we call the strain produced in a body when the deforming force produces a change in its shape without changing its volume?
[A] Linear Strain
[B] Volumetric Strain
[C] Shearing strain
[D] Thermal Strain

What is the order of distance for Vander Wall forces to be active?
[A] 10^–6 metre
[B] 10^–7 metre
[C] 10^–8 metre
[D] 10^–9 metre

Which of the following element has the highest first ionization enthalpy?
[A] Magnesium
[B] Strontium
[C] Beryllium
[D] Barium

What is the electron configuration of Radium?
[A] 6s²
[B] 7s²
[C] 7s² 7p⁶
[D] 7s² 7p⁴

What is the general outer electron configuration of Group 13 elements?
[A] ns² np²
[B] ns²
[C] ns² np¹
[D] ns² np³

Which of the following methods is most suitable for ore concentration if the ore is soluble in some suitable solvent?
[A] Hydraulic Washing
[B] Magnetic Separation
[C] Froath floatation
[D] Leaching

Which of the following refining methods works on the principle that impurities are more soluble in the melt than in the solid state of the metal?
[A] Liquation
[B] Electrolytic refining
[C] Zone refining
[D] Vapour Phase refining