Question

correctnswer for U
Meme
C
(d) all of these
11: Biogas is produced by decomposition of animal
(c) pure gas only.
only.
cria. Change B: Biogas is burnt as other fuels. Which
(d) None of these
(c) Both (a) and (b)
(d) all of these
d as fuel in kitchen. It exists as a liquid in a cylinder. When it
gas (Change A). It is burnt to produce heat energy (Change
al change and Change B is a chemical change.
ito
C4. Multiple Choice Questions (MCQS): Choose the corre
1. Crystallization is a process of obtaining
(a) pure solids only. (b) pure liquids only.
2. Observe the following to changes. Change AB
and plant waste by anaerobic bacteria. Change :
a chemical change?
(a) Change A (b) Change B
3. Rusting of iron can be prevented by
(a) galvanizing. (b) electroplating. (C)
4. LPG (Liquefied Petroleum Gas) is used as fuel in kitchen
comes out of the cylinder, it becomes a gas (Change A.
B). Which of the following statement is correct?
(a) Change A is a physical change and Change B is a chen
(b) Change A is a chemical change and Change B is a physica
(c) Both changes A and B are physical changes.
(d) Both changes A and B are chemical changes.
5. When an iron nail is dipped in blue copper sulphate solution.
(i) colour of the solution changes to green.
(ii) colour of the solution fades.
(iii) brown deposit is observed on the iron nail
(iv) brown deposit is observed at the bottom of the beaker.
Which of the above statements are correct?
(b) (i) and (iii) are correct.
(a) (i) and (ii) are correct.
(d) (i) and (iv) are correct.
(c) (ii) and (iv) are correct.
DO AND LEARN​

Answer 1

Answer:

Answer is

B (i) and (iii) are correct

Answer 2

Answer: Bazinga my dude

Explanation: Ur moms the explanation