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Worksheets

Actual March 2025

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

What is the process of breaking down large organic compounds into smaller ones?

a)

fragmentation

b)

distillation

c)

cracking

d)

segmentation

2.

The Bohr theory was developed to explain which of these phenomena?

a)

energy levels

b)

photoelectric effect

c)

line spectra

d)

quantum numbers

3.

A scientific law can be expressed as:

a)

a written concept

b)

an equation and verbal concept

c)

printed graph

d)

written concept, an equation and graph

4.

What Apollo mission failed after the astronauts died a few weeks before they were supposed to land on the moon?

a)

apollo 1

b)

apollo 3

c)

apollo 11

d)

apollo 13

5.

Who were the crew on Apollo 15?

a)

Neil Armstrong, Buzz Aldrin, jim lovell

b)

Jack Swigert, Ken Mattingly, Michael Collins

c)

Alfred Worden, Thomas Stafford, Ed White

d)

David Scott, Alfred worden, james Irwin

6.

What is the molar mass of acetic acid?

a)

36.04 g/mol

b)

58.68 g/mol

c)

60.05 g/mol

d)

68.54 g/mol

7.

To what family does 1s22s22p5 belong?

a)

alkali metals

b)

alkali earth metals

c)

halogens

d)

noble gases

8.

What is the possible effect of the construction of dams?
I. contributes to global warming

II. displaces communities

III. increases the occurrence of water-borne diseases

a)

I and II

b)

II and III

c)

I and III

d)

I, II, and III

9.

Who was the first to propose the existence of ions?

a)

Arhennius

b)

Lewis

c)

Berzelius

d)

Lowry

10.

The discovery of which scientist led to a deeper understanding of the principles of stoichiometry?

a)

Robert Boyle

b)

Antoine Lavoisier

c)

Blaise Pascal

d)

John Dalton

11.

What is the correct formula of the product when lithium and sulfur react to produce lithium sulfide?

a)

Li2S

b)

LiS

c)

LiS2

d)

Li2S2

12.

A carcinogen is:

a)

any substance involved in causing cancer

b)

a gene

c)

a type of blood disease

d)

another name of cancer

13.

When a gamma ray is emitted, the stability:

a)

increases

b)

decreases

c)

stays the same

d)

is unaffected

14.

A substance that increases the rate of reaction but is not consumed.

a)

carcinogen

b)

reactant

c)

product

d)

catalyst

15.

An iron exchange reaction can be identified by all of the following except:

a)

the required addition of heat

b)

generation of gas

c)

formation of precipitate

d)

formation of water

16.

Which hydrocarbon has double bonds?

a)

alkane

b)

alkyne

c)

alkene

d)

alkine

17.

How many half-lives would it take for a sample of radionuclide to decrease to 1/32 of its original amount?

a)

5

b)

6

c)

32

d)

16

18.

Which among the following have the smallest atomic radius?

a)

Be

b)

Na

c)

S

d)

O

19.

To reduce the force that your hand will experience while catching the baseball, it is best to:

a)

open your palm widely

b)

stay in your position

c)

move backward while catching it

d)

move forward while catching it

20.

Which among the following is false about Ca?

a)

Ca contains 4 occupied electron shells

b)

Ca has 20 valence electrons

c)

it is in group 2A

d)

It is in period 4

21.

Refers to the total potential and kinetic energy of an everyday-sized object.

a)

internal energy

b)

density

c)

external energy

d)

heat energy

22.

What is the gram-formula weight of sodium chloride?

a)

58.44 g

b)

60.05 u

c)

58.44 u

d)

60.05 g

23.

In which of the following mediums does light travel fastest?

a)

glass

b)

plastic

c)

water

d)

air

24.

Which is the basic difference between a monomer of polyethylene and a monomer of polyvinyl chloride?

a)

addition of four fluorine atoms

b)

replacement of a hydrogen by a chloride

c)

removal of double bonds

d)

removal of all hydrogen atoms

25.

Which of the following sets is best for knowing the density of a liquid?

a)

balance and graduated cylinder

b)

balance and periodic table

c)

periodic table and thermometer

d)

balance and thermometer

26.

The majority of stable nuclides belong to what category?

a)

odd-even

b)

even-odd

c)

even-even

d)

odd-odd

27.

The energy in eV of the electron of a hydrogen atom in its orbit n=3 is:

a)

-2.51 eV

b)

2.51 eV

c)

-1.51 eV

d)

1.51 eV

28.

An appliance works well when connected with a 220V outlet. when it is transferred to a 110V outlet, what happens to its current?

a)

4x

b)

2x

c)

remains the same

d)

0.5x

29.

A trolley travels 12 km at 30 minutes. Its average speed is:

a)

12 km/hr

b)

24 km/hr

c)

48 km/hr

d)

6km/hr

30.

The effect called mirage has something to do with:

a)

zinc container

b)

asphalt seal

c)

electrolytes

d)

carbon rod

31.

A transformer has 300 turns in its secondary coil and 50 turns in its primary coil. The primary coil is connected to a 12V source. If a 3.0A current flows through the primary coil, how much current flows through the secondary coil?

a)

4.0A

b)

2.0A

c)

0.25A

d)

0.5A

32.

Sedimentary rocks are:

a)

the least abundant surface rock

b)

the most abundant surface rock

c)

the most abundant rock type in the crust

d)

a product of crystallization

33.

For the hydrogen atom, which series describes electron transitions to the N=1 orbit, the lowest energy electron orbit?

a)

Lyman series

b)

Balmer series

c)

Paschen series

d)

Pfund series

34.

In a darkened room in front of a white wall, you cast a shadow of your hand by red and green colored lamps. How will the colors of the wall and the left and right shadows of your hand appear, respectively?

a)

yellow, green, and red

b)

green, red, and yellow

c)

red, green, and yellow

d)

yellow, red, and green

35.

If the wavelength of a 4.40 x 102 Hz sound in freshwater is 3.30 m, what is the speed of the sound water?

a)

1.10 x 103 m/s

b)

1.45 x 103 m/s

c)

7.70 x 103 m/s

d)

7.70 x 102 m/s

36.

If you are to cook eggs and you are in a high mountain, you have to:

a)

boil for a shorter time

b)

use a hotter flame

c)

use more water to boil

d)

boil for a longer time

37.

When two resistors are connected in series, both resistors:

a)

have the same current

b)

have the same potential difference

c)

have the same power

d)

generate equal amount of heat

38.

The earth’s precession:

a)

has no effect to the climate of the earth

b)

has a period of 26,000 years

c)

moves clockwise as viewed from the south pole

d)

moves counterclockwise as viewed from the north pole

39.

Which Apollo mission landed in the moon in 1967 with high accuracy, only a walking distance away from the Surveyor III?

a)

Apollo 10

b)

Apollo 11

c)

Apollo 12

d)

Apollo 13

40.

Which of the following principal quantum numbers has the highest energy?

a)

3

b)

4

c)

5

d)

7.5

41.

A stone is thrown upward from a roof at the same time as an identical stone is dropped from there. The two stones.

a)

reach the ground at the same time

b)

have the same velocity when they reach the ground

c)

have the same acceleration when they reach the ground

d)

none of the above

42.

Of the following, which occurs naturally as diatomic molecule?

a)

iodine

b)

fluoride

c)

argon

d)

sulfur

43.

Rank the following based on the number of elements. I. Molecule II. Compound III. Mixture

a)

I, III, II

b)

III, II, I

c)

I, II, III

d)

II, III, I

44.

Airplanes are designed with pointed nose and thin tails in order to:

a)

produce fluid friction

b)

reduce drag

c)

increase the lift of the wing

d)

lessen the forward thrust

45.

Which of the following is independent of the others?

a)

frequency

b)

amplitude

c)

wavelength

d)

velocity

46.

Two students dared to climb to the diving board to dive to the swimming pool. One student is twice as massive as the other. Which of the following statements is true?

a)

they will have the same potential energy on the diving board

b)

they will have the same kinetic energy just before hitting the water

c)

the heavier student did twice as much work climbing

d)

they will have the same force just before hitting the water

47.

Kepler’s third law can be expressed in the formula:

a)

T2=Kr3

b)

T3=Kr2

c)

T2=Kr2

d)

T3=Kr3

48.

Air is composed of 78% nitrogen, 21% oxygen, and traces of water vapor, carbon dioxide, argon, and other components. What is the partial pressure of nitrogen in air (101.325 kPa)?

a)

79.03 kPa

b)

21.28 kPa

c)

78.00 kPa

d)

109.32 kPa

49.

Which planet makes complete rotation in approximately 11 hours, and has approximately 9.5 times the diameter of earth?

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

50.

The unit of radiation that takes into account its biological effects.

a)

rad

b)

curie

c)

becquerel

d)

sievert

51.

This apollo mission installed a nuclear power plant on the moon.

a)

Apollo 10

b)

Apollo 11

c)

Apollo 12

d)

Apollo 13

52.

What are the two basic types of simple machine?

a)

lever and pulley

b)

wedge and crew

c)

lever and inclined plane

d)

wheel and axle

53.

Which is true of the geologic time scale?

a)

the quaternary period is the youngest period

b)

we are currently living in the quaternary period

c)

the quaternary period epoch is the oldest epoch

d)

we are currently in the industrial epoch

54.

A Douglas fir grows well in:

a)

moist envitonment

b)

swampy environment

c)

bog-like environment

d)

full sun

55.

An elevator has maximum carrying capacity of 600 N. As the elevator in maximum capacity moves upward at constant velocity, the cable exerts a force of 800 N. Which of the following statements is true?

I. the potential energy of the elevator is constant

II. the kinetic energy of the elevator is constant

III. the momentum of the elevator is constant

IV. the elevator is accelerating

a)

II and III only

b)

III and IV only

c)

II, III, and IV

d)

I, II, III, and IV

56.

Which is not a type of star?

a)

neutron star

b)

cepheid variable

c)

seyfert

d)

white dwarf

57.

Which are main agents of erosion?

a)

wind, ice

b)

wind, force

c)

sun, ice

d)

water, sun

58.

A student walks from home to school three blocks away and then returns home for lunch. After lunch, he goes back to school. His total displacement is.

a)

0 block

b)

3 blocks

c)

6 blocks

d)

9 blocks

59.

Two point five of sodium chloride (NaCl) solution contains five moles of the solute. What is the molarity?

a)

5 molar

b)

2 molar

c)

2.5 molar

d)

12.5 molar

60.

By what name is an upward pointing arch of a fold known?

a)

anticline

b)

syncline

c)

hotspot

d)

hanging wall

61.

A light ray hits a mirror at 30° from the perpendicular. What is the angle of reflection?

a)

25°

b)

30°

c)

120°

d)

150°

62.

What do you call the area of the solar system where long-period comets originate?

a)

asteroid belt

b)

Kuiper Belt

c)

region between Jupiter and Neptune

d)

Oort cloud

63.

Moraine is a:

a)

soil deposit

b)

type of storm

c)

glacier deposit

d)

wind system

64.

What principle states that pressure on one side of a fluid in a closed container is equal and undiminished on all other parts of the fluid and acts in all directions?

a)

Bernoulli principle

b)

Archimedes principle

c)

Pascal principle

d)

Newton principle

65.

The prevailing wind system that is responsible for weather changes in the polar regions.

a)

easterlies

b)

westerlies

c)

trade winds

d)

doldrums

66.

Of these statements, which is true of the Pangaea?

a)

It was named Scott Wegener

b)

It appeared 25 million years ago

c)

It existed in the Proterozoic eon

d)

It was named Alfred Wegener

67.

One gigahertz is equal to:

a)

1 x 10^9 hertz

b)

1 x 10^10 hertz

c)

1 x 10^6 hertz

d)

1 x 10^12 hertz

68.

When does complete destructive interference occur?

a)

when the waves have equal amplitude and are completely in phase

b)

when the waves have equal amplitude and are completely out of phase

c)

when the waves have unequal amplitude and are completely in phase

d)

when the waves have unequal amplitude and are completely out of phase

69.

What is the volume of one mole of any gas at STP?

a)

12.5 L

b)

16 L

c)

22.4 L

d)

25 L

70.

How were scientists able to identify the approximate age of the moon?

a)

measurement of depth of moon dust

b)

radioactive dating of moon rocks brought to earth

c)

measurement of the moon’s tilt from its axis

d)

measurement of the distance of the moon from earth

71.

Which is not one of Kepler’s laws?

a)

elliptical orbits

b)

equal areas

c)

radial velocity

d)

harmonic law

72.

How does toothpaste help prevent tooth decay?

a)

it neutralizes acids in the mouth that lead to tooth disintegration

b)

it encloses the enamel with a substance to keep it strong

c)

it helps give a fresher breath

d)

it actually does not help prevent tooth decay

73.

What is the approximate age of the universe?

a)

13.5 billion years

b)

13.8 billion years

c)

14.5 billion years

d)

14.7 billion years

74.

What phenomenon creates elements heavier than iron?

a)

black hole radiation

b)

supernova explosion

c)

binary star system

d)

fission reaction

75.

The Crab Nebula is a result of:

a)

supernova explosion

b)

black hole collapse

c)

hawking radiation

d)

schwarzschild radius

76.

Father of geology

a)

George Lemaltre

b)

Alfred Wegener

c)

James Hutton

d)

Charles Lyell

77.

All of the following are requirements for the Bergeron process except:

a)

mixing

b)

supercooled vapor

c)

ice crystals

d)

silver iodide

78.

The brightest stars belong to the:

a)

first magnitude

b)

second magnitude

c)

fifth magnitude

d)

seventh magnitude

79.

Which is a feature of the sun?

a)

crater

b)

tail

c)

prominence

d)

coma

80.

What fusion reaction occurs in the core of the sun?

a)

proton-proton reaction

b)

helium-helium reaction

c)

hydrogen-helium reaction

d)

proton-helium reaction

81.

This law states that the farther galaxies have greater acceleration away from earth.

a)

Newton’s law

b)

Hawking’s law

c)

Halley’s law

d)

Hubble’s law

82.

Below are different quantities and their corresponding units- symbols. Which is not a correct pair?

a)

length - m

b)

speed – m/s

c)

temperature – kg

d)

mass – kg

83.

Stress in rocks caused by movements of the earth’s crust creates:

a)

normal fault

b)

normal, reverse, and strike-slip fault

c)

reverse fault

d)

strike-slip fault

84.

Refers to any fundamental frequency above the fundamental frequency.

a)

undertone

b)

harmonic

c)

overtone

d)

second harmonic

85.

What is the natural state of motion of an object?

a)

free fall

b)

uniform velocity

c)

accelerating

d)

at rest

86.

Given the reaction CH4 + 2O2 → CO2 + 2H2O, what amount of oxygen is needed to react to completely react with 1 mole of CH4?

a)

2 moles

b)

2 atoms

c)

2 molecules

d)

2 grams

87.

Diamond is a/an of carbon.

a)

isotope

b)

isomer

c)

allotrope

d)

monomer

88.

Which is true in all places found in latitudes greater than 44° from the equator?

a)

the sun is never directly overhead

b)

the sun shines all day and night

c)

there are no seasons in this region

d)

there are only wet and dry seasons

89.

When a cold front advances under a warm front, this is called a:

a)

warm front

b)

cold front

c)

cold front occlusion

d)

warm front occlusion

90.

A resistor that follows Ohm’s law is called:

a)

parabolic

b)

diode

c)

linear

d)

integral

91.

A hydrocarbon with the maximum number of hydrogen atoms is called:

a)

saturated

b)

unsaturated

c)

alkyne

d)

alkene

92.

Which is true of parallel circuits?

a)

all resistors have the same resistance

b)

current has more than one path of flow

c)

voltage differs in every branch of the circuit

d)

total resistance is greater than the individual resistances

93.

A certain materials has the refractive index n=2.56. What is the speed of light in the material?

a)

1.17 x 10^8 m/s

b)

7.68 x 10^8 m/s

c)

11.7 x 10^8 m/s

d)

76.8 x 10^8 m/s

94.

How can we describe an object that is thrown upward?

a)

accelerating upward

b)

accelerating downward

c)

not accelerating

d)

has constant velocity

95.

What is the atomic number of Oganesson?

a)

116

b)

117

c)

118

d)

119

96.

Which of the following will have zero dipole moment

a)

H-Br

b)

H-F

c)

H-CR

d)

Br-Br

97.

Which reference line passes through both the geographic North Pole and the geographic South Pole?

a)

0° latitude

b)

0° longitude

c)

Tropic of Cancer

d)

Tropic of Capricorn

98.

The natural direction of heat flow is from the body of higher temperature to the body of lower temperature is stated in the:

a)

first law of thermodynamics

b)

second law of thermodynamics

c)

law of conservation of energy

d)

law of conservation of entropy

99.

The distance-time graph of motion of a car shows a horizontal line. This means that:

a)

the car is accelerating

b)

the car is moving at constant speed

c)

the car is at rest

d)

the car is moving at constant acceleration

100.

Which object would orbit Earth in both the Earth-centered and sun-centered models of the solar system?

a)

Moon

b)

Venus

c)

Polaris

d)

Sun

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