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Q. A person is standing in front of a wall and makes a sound. What should be the normal minimum distance between the person and the wall , so that the person hears echo?

Q. Anemophily‘ is pollination by :

Q. What is the common name of Calcium Sulphate Hemihydrate?

Q. Equal volumes of all gases contain equal number of molecules under similar conditions of temperature and pressure. Which law says this ?

Q. The term ―Gypsophils‖ is associated with the people who have liking for which among the following?

Q. The Science of using mechanical devices with human muscle skeleton and nervous systems to assist or enhance motor control lost by trauma, disease or defect is called:

Q. Consider the following advantages of the Optic Fibers and the Copper wires: Optic Fibers are NOT susceptible to the electrical interference Optic Fibers can be used to transmit more signals that Copper Wires Optic Fibers can carry a signal over a single fiber, unlike the electricity which requires a pair of Copper wires. Which among the above stand correct ?

Q. Pyrolusite, Braunite, Psilomelane and Rhodochrosite are the ores of which among the following: 1. Manganese 2. Aluminium 3. Copper Choose the correct option:

Q. Amalgam‘ is a term used for an alloy of a metal with:

Q. Which of the following statements is incorrect about a Plane Mirror?