Question

B. Circle the odd-one out giving appropriate reason.1. Burning of wood, Ageing of living beings, Stretching of rubber band, Rusting of iron2. Change in colour, Change in temperature, Physical change, Breaking of a stick, Curdingof milk3. Sublimation, Ammonium chloride, Sublimate, Evaporation, Melting of a solid4. Magnesium ribbon, Dazzling light, Chemical change, Exothermic reaction, Crystallisation​

Answer 1

Answer:

1 - Rubberband  2- Curding of Milk 3 -  Ammonium chloride 4 - Crystalisation

Explanation:

1 - Only physical change

2 - Chemical change rest are physical

3 - Ammonium chloride is a thing rest are processes

4 - All except Crystallisation are part Burning of Magnesium ribbon

Answer 2

Answer:

1. Stretching of rubber band

2. Curding of milk

3. Evaporation

Explanation:

1. STRECHING OF RUBBER BAND: Others are irreversible change, while streching of a rubber band is a reversible change.

2. CURDING OF MILK: Change in colour and temperature are the characterstics of Physical change, and Breaking of a stick is an example of Physical change, while, Curding of milk is an example of Chemical Change.

3. EVAPORATION: evaporation because ammonium chloride is an example of sublimate in the process of sublimation and in this process solid is melted and changes into vapour.