Science good plz?

Question

(iii) complete this sentence by choosing the correct ion from the box

H+ NH4+ NO3- 02- OH-

THE ION THAT MAKES SOLUTION ACIDIC IS ?

Complete thsi sentence about crude oil ?

crude oil is mainly a mixture of compounds called ...................... which contain carbon and hydrogen only.

complete each sentence by choosing the correct words from the box.

condesation
distillation
evaporation
melting
sublimation

the main process takeing place at A is .........................................
the main process takeing place at B is .....................................
this method of separating crude oil is called ....................................


complete this sentence by crossing out the word in each box this is wrong. the first one has been done for you.

this method of separating crude oil works because the smaller the molecules are, the high or lower their boiling point and the more or less volatitle they are.

Answer 1

the presence of the H+ ions makes the solution acidic

Answer 2

H+ and NH4+ are both correct, but H+ is probably the best answer.

Cmpds with just carbon and hydrogen are hydrocarbons

Since there is no figure, I can't help with the next two
Separating crude oil is distillation

Smaller molecules have lower boiling points and are more volatile.

Answer 3

H+ makes it acidic.

Answer 4

its h+