1.由产生气体引发的物理现象例1 某同学用图1的装置验证质量守恒定律时,已将天平调节平衡,现将锥形瓶倾斜,使稀盐酸与大理石接触,待充分反应后,发现天平指针 (填“偏向α方向”,“偏向b方向”或“无偏 1. Physical phenomena caused by gas generation Example 1 When a student used the device of Fig. 1 to verify the law of conservation of mass, the balance was adjusted and balanced, and the conical flask was tilted so that dilute hydrochloric acid was in contact with the marble. After sufficient reaction, it was found that Scale pointer (fill in “bias to α”, “bias to b” or “unbiased”