The corect answers will be:
1) A
2) B
3) D
Hope this helped :)
Answer : The boiling point of water increases, 
Solution : Given,
Moles of solute (sugar) = 4 moles
Mass of solvent (water) = 1 Kg

i = 1 for sugar
Formula used :

Where,
= elevation in boiling point
= elevation constant
m = molality
= moles of solute (sugar)
= mass of solvent (water)
i = van't Hoff factor
Now put all the given values in this formula, we get the elevation in boiling point of water.

Therefore, the elevation in boiling point of water is 
Answer:
A
Explanation:
it becomes a positive charge and fully filled
Answer:
D) burning a candle
Explanation
When burning a candle no new substance is form.
We have both physical and chemical change occuring.
Physical part: Melting of the solid wax and evaporation of the liquid forms the physical change.
Chemical part: burning of the wax vapour forms the chemical change.
Explanation:
Rock a is a sedimentary and rock B is a sediment rock also known as sandstone