As per the Mohs scale of mineral hardness, which of the following are soft metals?
 1. Gold
 2. Copper
 3. Diamond
 4. Thorium
Select the correct option from codes given below:
[A] 1 & 4 Only
[B] 1, 2 & 4 Only
[C] 2 & 4 Only
[D] 1, 2, 3 & 4

Consider the following pairs:
1. Strontium carbonate – Red fireworks
2. Barium chloride – Green fireworks
3. Copper chloride – Blue fireworks
4. Sodium nitrate – Yellow fireworks
 Which of the above are correct?
[A] 1 & 2 Only
[B] 2 & 3 Only
[C] 1, 2 & 3 Only
[D] 1, 2, 3 & 4

Which of the following chemicals is also known as "sweet oil of vitriol"?
[A] Diethyl ether
[B] Aluminium sulphate
[C] Sulphuric acid
[D] Iron(III) sulphate

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