Question

#1: 2H2O + 2K (s) 2KOH (l) + 2H2 (g) is an example of which type of reaction?

A. single-displacement

B. combustion

C. decomposition

D. double-displacement

**my answer; A

is that right?

Answer 1

#2: When cadmium (Cd) is mixed with hydrochloric acid (HCl), a single-displacement reaction occurs. What will be the product or products?

A. CdCl2 + H2

B. Cl and H

C. CdCl2

D. Cd + HCl
**my answer: A

is that it?

Answer 2

yep! these are right

Answer 3

#3: Double-displacement reactions are often defined by which of the following?

A. formation of a precipitate

B. release of light

C. use of oxygen as a reactant

D. breakdown of only one compound

**my answer; A
is that right??

and yayyy :) wootwoot !! haha

Answer 4

#4: Na2S (l) + CdNO3 (l) ---> CdS (s) + 2NaNO3 (l) is which type of reaction?

A. decomposition

B. synthesis

C. double-displacement

D. single-displacement

**my answer; C. double displacement

is that it?

Answer 5

#5: Which of the following is the best description of a redox reaction?

A. a reaction in which two new products are created

B. a reaction that results in the release of heat or light

C. a reaction in which a precipitate forms as a product

D. a reaction in which the exchange of electrons (or oxygen) occurs

**my answer: D

is that right?

Answer 6

yep! except 3 is not completely right, but out of the possible answers is what you chose haha

Answer 7

oh okay haha :P so #3 is right then? :)

what should it be then?

Answer 8

yep! well double displacement reactions MIGHT give you a precipitate if a combination of the reactants gives you an insoluble product. there simplifying it for ya. double displacement reactions would be characterized as just ending up with different compounds from which you started with, but again thats a simplification.

Answer 9

ohh okay but thats the best choice out of my answer choices tho? :D

Answer 10

oh wait haha u already said that!! lol my bad :P thanks!!

Answer 11

haha :P

Answer 12

;P lol sorry bout that!! haha