Which of the following reactions take place when iron nail in a copper sulphate solution becomes brownish in colour?
[A] Decomposition reaction
[B] Displacement reaction
[C] Double Displacement reaction
[D] None of the above

Which of these methods can be used to prevent rancidity?
[A] Adding antioxidants to the food
[B] Storing food at low temperature
[C] Replace the air with nitrogen in the packing material
[D] All of the above

What is the order of the reaction which is independent of the concentration of reactants?
[A] Zero order
[B] First order
[C] Second order
[D] Third order

Upto which element the Law of Octaves was found to be applicable?
[A] Carbon
[B] Calcium
[C] Iron
[D] Copper

Which of the following represents the reaction of Calcium oxide and water to form Slaked lime?
[A] Displacement reaction
[B] Combination reaction
[C] Double Displacement reaction
[D] None

Which of the following elements has the largest atomic radii?
[A] Lithium
[B] Beryllium
[C] Boron
[D] Carbon

Which of the following is true about a water molecule?
[A] It has a bent-shaped structure
[B] The bond angle is 120°
[C] It is a non-polar solvent
[D] All of the above

Choose the correct statement about covalent compounds?
[A] The forces of interaction between them is weak
[B] They are poor conductors of electricity
[C] Both a and b
[D] None of the above

Which of the following factors affect the lattice energy of an ionic compound?
[A] Size of the ion
[B] Charge of the ion
[C] Both a and b
[D] None of the above

What is the bond formed due to the electrostatic attraction known as?
[A] Covalent bond
[B] Electrovalent bond
[C] Electromagnetic bond
[D] Polar bond

What is meant by Bond length of two bonded atoms in a molecule?
[A] equilibrium distance between their valence electrons
[B] equilibrium distance between their outermost shell
[C] equilibrium distance between their nuclei
[D] twice the distance between their valence electrons