Which of the following statements is/are correct?
1. The slope of the sublimation and vaporisation curves for all the substances are positive.
2. The slope of the fusion curve for most substances is positive, but for water, it is negative.
3. The slope of the sublimation and vaporisation curves for all the substances are negative.
4. The slope of the fusion curve for most substances is negative, but for water, it is positive.
1
1 and 2
2
2 and 3
3
1 and 4
4
1 only