Analyse the given statements and answer the questions given below:
1. Riya observed the following events during one day:
1. Ice cubes melted in a glass.
2. Bread was toasted.
3. Wet clothes dried in sunlight.
4. An iron gate developed a reddish-brown coating after several months.
Which of the following events involves the formation of a new substance?
1. Ice cubes melted in a glass.
2. Bread was toasted.
3. Wet clothes dried in sunlight.
4. An iron gate developed a reddish-brown coating after several months.
Which of the following events involves the formation of a new substance?
2. A teacher places three identical candles under different glass jars.
1. Jar A contains normal air.
2. Jar B contains very little air.
3. Jar C contains only carbon dioxide.
Which candle will continue burning for the longest time?
1. Jar A contains normal air.
2. Jar B contains very little air.
3. Jar C contains only carbon dioxide.
Which candle will continue burning for the longest time?