Question

1. Which of the following is non-biodegradable
pollutant?
(a) Paper
(b) DDT
(c) Wood
(d) Sewage
2. The bacteria present in contaminated water is
(a) Clostridium (b) Coliform
(C) Streptococcus (d) Mycobacterium
Which of the following statements about the given
reaction are correct?
3Fe(s) + 4H2O(g) Fe,O,(g) + 6H (g)
(i) Iron metal is getting oxidised
(ii) Water is getting reduced
(iii) Water is acting as reducing agent
(iv) Water is acting as an oxidising agent
(a) (). (ii) and (iii) (b) (iii) and (iv)
(c) (i), (ii) and (iv) (d) (ii) and (iv)
Drinking alcohol is very harmful and it ruins the
health. "Drinking alcohol" stands for
(a) drinking methyl alcohol
Na, Si, CI, Mg, AL
(a) CI > Si > Al > Mg > Na
(b) Na > Mg > Al > Si > Cl
(c) Na > Al> Mg > CI > Si
(d) AI > Na > Si > Ca > Mg
8. Name most abundant element in earth crust. I
metal or non metal?
(a) Oxygen, Non-metal
(b) Aluminium, Metal
(c) Silicon, Metalloid
(d) Iron, Metal
9. MRI stands for
(a) Magnets Resonant Imaging
(6) Magnetic Resonance Imaging
(c) Magnetic Radar Imaging
(d) Magnets Radial Imagic
10. The longest cell in human body is
(a) liver cell (b) muscle fibre
(c) reproductive cell nerve cell
th) drink​

Answer 1

Answer:

non biodegradable is sewage