Board May 2016

Question 1

citric acid and malic acid .what they have in common?

Answer 1

Acid in fruits

Both sour

Question 2

effect in mass no. and atomic no. of alpha emissions

Answer 2

Decrease mass no. By 4

Decrease atomic no. By 2

Question 3

Breakage of larger isotope into smaller isotope

Answer 3

Nuclear fission

Question 4

Radioactivity

Answer 4

Becquerel

Question 5

Radioactivity

Answer 5

Becquerel

Question 6

Definition of radioactivity

Answer 6

Search

Question 7

Vulcanized rubber

Answer 7

Charles Goodyear

Question 8

Level of toxicity

Heptachlor, dieldrum, ddt, arsenic, Cr

Answer 8

Ddt, dieldrum, Heptachlor, Chromium, arsenic

Question 9

Atomic Mass Unit

Answer 9

1/12 mass of atom of Carbon-12

Question 10

City in laguna generates….

Answer 10

19000 kg/day and 39000 kg/day

And 4 trucks and 8 trucks

Question 11

A power plant in Benguet….

Answer 11

5.82 Km

Question 12

Tagaytay Problem…..

Answer 12

-1.02 degree C per 100 meter

Question 13

Determine whether the atmosphere is stable, unstable or neutral

Answer 13

Neutral, unstable, stable

Question 14

Marikina and pasig river problem

Answer 14

Plant B in marikina river

Question 15

Who coined the term Isotope

Answer 15

Soddy

Question 16

Who coined the term Vitamin

Answer 16

Funk

Question 17

Can oxygen be sythesized from nitrogen

Answer 17

Yes

Question 18

Naturally occuring isotpe of boron

Answer 18

Boron 10

Question 19

The line spectrum for hydrogen where thr light from a hydrogen lamp appears the eye as reddish purple color is known as the

Answer 19

Balmer series

Question 20

Greenish blue spectral line

Answer 20

486.1 nm

Question 21

Most penetrating radiation

Answer 21

Gamma ray