What do we call the reactions in which heat is generated? [A] Exothermic [B] Endothermic [C] Both a and b [D] None
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Exothermic
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
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