A student mixed some liquids in a laboratory. Different combinations are prepared and observations are made: . Combination 1: Both liquids were dissolved, and no separate layers formed. . Combination 2: One of the two liquids settled down at the bottom, and liquids did not mix. . Combination 3: Upon mixing both liquids together, the mixture became hot and bubbles formed. . Combination 4: At first, when the liquids were mixed together nothing happened, but upon heating, the mixture changed color. Which of the combinations given above will speed up if the surrounding temperature is increased? 1 and 4 1 and 2 2 and 3 3 and 4â
