PBE APR 2014 Flashcards

1
Q

Process of breaking down a large isotope into smaller isotopes.

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

A

a. nuclear fission

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2
Q

Formula of Red Lead

A

Pb3O4

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3
Q

Can oxygen be synthesized from nitrogen?

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

A

c. Impossible

Unless exposed in temperatures as that of sun and stars

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4
Q

Author of octet rule

A

Gilbert Lewis

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5
Q

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

A

4,0,0

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6
Q

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

A

sublimation

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7
Q

Notation on alkane containing Cl

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

A

a. chloro

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8
Q
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?
A

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

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9
Q

Characteristics of elements under group 1A

A

Has 1 electron on its outer most energy level

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10
Q

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

A

C.

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11
Q

Description of a primary and a secondary cell

A

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

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12
Q

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

A

Barbituric acid

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13
Q

Which layer of the atmosphere contains the ozone layer?

A

Stratosphere

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14
Q

Composition of acid in acid rain?

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

A

c. nitric and sulfuric

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15
Q

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?

A

Methane

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16
Q

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

A

c. reaction with Br2

17
Q

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

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

A

c. Na

18
Q

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

A

a. increase

19
Q

Formula of alar

A

(C6H12N2O3)

20
Q

Particle with the same mass as proton

A

neutron

21
Q

Polymer used in bullet proof vest

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

A

polymethylacrylate

22
Q

Other term of earth wax

A

ozocerite

23
Q

Other name of Yamatake system (process automation - DCS)

a. android
b. windows
c. azbil

A

c. azbil

24
Q

What is used in ultrasonic flow meters

A

Doppler

25
Q

Which of the following is not dependent on temperature and wavelength?

a. black body
b. gray body
c. plasma
d. moving body

A

d. moving body

26
Q

Electronic noise inside an electric conductor which is independent of applied voltage

a. shot noise
b. Johnson noise
c. white noise

A

b. Johnson noise

27
Q

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

A

error

28
Q

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

A

28/29