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Chemistry Metal And Its Compounds Difficulty: Medium

Consider the following statements. 1. Gold is the most ductile metal. 2. The best conductors of heat are silver and copper. 3. Alkali metals (lithium, sodium, potassium) are so soft that they can be cut with a knife. Which of the statements given above are correct?

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. . . . . . . . is an alkali metal. Match List-I with List-II and select the correct answer: List-I List-II a. Best conductors of heat and electricity 1. Gold b. The highest amount of metal is found 2. Lead c. Most flexible and able to increase by bang metal 3. Aluminium d. Minimum heat conducting 4. Silver In the modern periodic table, in which period elements of atomic numbers 11 to 14 are placed: Consider the following statements. 1. Fuels with low octane numbers are ideal for diesel engines. 2. Use of gasoline with low octane numbers may lead to the problem of engine knocking. Which of the statement(s) given above is/are correct? The number of molecules taking part in the rate determining step is called___________________?