PBE APR 2014

Question 1

Process of breaking down a large isotope into smaller isotopes.

a. nuclear fission
b. beta particle emission
c. nuclear fusion
d. gamma ray emission

Answer 1

a. nuclear fission

Question 2

Formula of Red Lead

Answer 2

Pb3O4

Question 3

Can oxygen be synthesized from nitrogen?

a. Yes, by the bombardment of alpha particles
b. Yes, by electron capture
c. Impossible

Answer 3

c. Impossible

Unless exposed in temperatures as that of sun and stars

Question 4

Author of octet rule

Answer 4

Gilbert Lewis

Question 5

How does alpha, beta and gamma particle affect the mass number of an atom?

Answer 5

4,0,0

Question 6

Iodine vapor forms iodine crystals when it touches a cold surface. What is the reverse of the process being described?

Answer 6

sublimation

Question 7

Notation on alkane containing Cl

a. chloro
b. chloride
c. chlorate
d. chloric

Answer 7

a. chloro

Question 8

Given: Dodecane
I. Is it soluble in water?
II. Is it soluble in hexane?
III. Is it combustible?
IV. Is it solid, liquid or gas at room temp. & atmospheric conditions?
V. Is it denser than water?

Answer 8

Ans: no, yes, yes, liquid, less dense

Question 9

Characteristics of elements under group 1A

Answer 9

Has 1 electron on its outer most energy level

Question 10

A tank is half filled with water, if N2 =1.02 moles and H20 =1.02 moles. What happens to the N2 when dissolved in water?

a. increase
b. decrease
c. remains the same
d. none of these

Answer 10

C.

Question 11

Description of a primary and a secondary cell

Answer 11

A primary cell can be recharged while secondary cannot, Ni-Cd is a primary cell, a dry cell is a secondary cell.

Question 12

Adolf Baeyer’s contribution in medicine, made by reacting malonic acid and urea with a catalyst is called.

Answer 12

Barbituric acid

Question 13

Which layer of the atmosphere contains the ozone layer?

Answer 13

Stratosphere

Question 14

Composition of acid in acid rain?

a. nitric and carbonic
b. sulfuric and carbonic
c. nitric and sulfuric

Answer 14

c. nitric and sulfuric

Question 15

Which of the ff has a higher heat of combustion on a gram per gram basis if Hf is 237 kj/mol and 532 kj/mol for methane and propane respectively?

Answer 15

Methane

Question 16

How to differentiate alkane alkene and alkyne?
combustion on an empty beaker
b. nature of carbon and its branching
c. reaction with Br2

Answer 16

c. reaction with Br2

Question 17

Which of the ff. has a larger ionic nucleus? Na+ or Na?

a. Both
b. Na+
c. Na
d. none of these

Answer 17

c. Na

Question 18

What happens to the melting point of a saturated fatty acid if -CH2- increase?

a. increase
b. decrease
c. the same
d. none of these

Answer 18

a. increase

Question 19

Formula of alar

Answer 19

(C6H12N2O3)

Question 20

Particle with the same mass as proton

Answer 20

neutron

Question 21

Polymer used in bullet proof vest

a. linear polyethylene
b. polyacrylonitrile
c. polycarbonate
d. polymethylacrylate

Answer 21

polymethylacrylate

Question 22

Other term of earth wax

Answer 22

ozocerite

Question 23

Other name of Yamatake system (process automation - DCS)

a. android
b. windows
c. azbil

Answer 23

c. azbil

Question 24

What is used in ultrasonic flow meters

Answer 24

Doppler

Question 25

Which of the following is not dependent on temperature and wavelength? a. black body b. gray body c. plasma d. moving body

Answer 25

d. moving body

Question 26

Electronic noise inside an electric conductor which is independent of applied voltage a. shot noise b. Johnson noise c. white noise

Answer 26

b. Johnson noise

Question 27

Difference between measured value and set point (choices: deviation, error, oscillation)

Answer 27

error

Question 28

What is the specific gravity of nitrogen at 80°F and 745mmHg compared to air at 80°F and 745mmHg.

Answer 28

28/29