Higher temperatures tend to increase the rate of a chemical reaction because the particles move faster and therefore collide more often.
Rate of reaction tells about the speed of the reaction or at what duration of time a reaction gets completed.
When we increases the temperature of any chemical reaction, then the kinetic energy of the molecules increases, due to which they move fast in the chemical reaction. Due to this random and fast movement molecules get collide with each other rapidly and easily form the product.
Hence option (c) is correct i.e. particles move faster and therefore collide more often when temperature increases.
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