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Science Test

Total questions: 80

Worksheet time: 1hrs 20mins

Name
Class
Date
1.

. A boy is whirling a stone tied with a string in a horizontal circular path as shown in the following figure:

a)

Will move along a straight line towards the centre of the circular path

b)

Will move along a straight line the tangential to the circular path

c)

Will move along a straight line perpendicular to the circular path away from the boy

d)

Will continue to move in the circular path

2.

Gravitation is the force of ________________

a)

attraction

b)

repulsion

c)

both

d)

none

3.

What is F = Gm1m2/r^2 ?

a)

Newton's Law of gravitation

b)

Newton's first law of motion

c)

Newton's Universal law of gravitation

d)

None

4.

What is the SI unit of G?

a)

Nm2/kg

b)

Nm2/kg2

c)

unitless

d)

none

5.

Gravity is the phenomenon between

a)

Earth and moon

b)

Earth and you

c)

Earth and any object

d)

none

6.

The value of g is

a)

9.8

b)

9.6

c)

8.6

d)

none

7.

The value of g is maximum at

a)

Poles

b)

Equator

c)

both

d)

none

8.

What is the difference between mass and weight ?( multiple select)

a)

Mass of an object is the quantity of matter contained in it whereas weight of an object is the force with which it is attracted towards the centre of earth

b)

Mass is a vector and weight is scalar

c)

Mass is constant whereas weight is not

d)

SI unit of mass is Kg and SI unit of weight is Newton

9.

When a body is partially or wholly immersed in a liquid ,the upward force acts on it which is called :

a)

Buoyant force

b)

Presure

c)

Area

d)

None

10.
Which represents the acceleration of the ball?
a)
A
b)
B
c)
C
d)
D
11.

moving or tending to move toward a center...

a)

centripetal force

b)

centrifugal force

c)

Tangent

d)

Curvature

12.
When an object is in circular motion it is constantly changing its velocity.
a)
True
b)
False
13.
When Earth orbits around the sun, it slows down when it is close to the sun. It speeds up its orbit when it is further from the sun. This is because the sun's gravity is stronger when you are closer to it.
a)
Kepler's 1st law
b)
Kepler's 2nd law
c)
Kepler's 3rd law
d)
Nutation
14.
Planets further from the sun have an orbit that lasts MUCH longer than planets that are close to the sun.
Pluto's orbit lasts over over 90,000 days.
Mercury's orbit lasts 88 days.
a)
Kepler's 1st law
b)
Kepler's 2nd law
c)
Kepler's 3rd law
d)
Nutation
15.
Planets orbit the Sun in a shape called a(n)
a)
circle
b)
ellipse
c)
focus
d)
perihelion
16.
The place where a planet is closest to the Sun as it orbits the Sun is called the
a)
perihelion
b)
aphelion
17.
Where is the planet moving faster
a)
Position A to B
b)
Position B to C
c)
Position H to I
d)
Position I to J
18.
The "Law of Harmonies" is which of Kepler's Laws?
a)
1st
b)
2nd
c)
3rd
d)
4th
19.
Kepler's first law states that the orbits of the planets are oval in shape or 
a)
ellipses
b)
perfect circles
20.

1.Newlands relation is called

a)

a) Musical Law

b)

(b) Law of Octaves

c)

(c) Periodic Law

d)

(d) Atomic Mass Law

21.

4.The arrangement of elements in the Modem Periodic Table is based on their

a)

(a) increasing atomic mass in the period

b)

(b) increasing atomic number in the horizontal rows

c)

(c) increasing atomic number in the vertical columns

d)

(d) increasing atomic mass in the group

22.

The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all

a)

halogens.

b)

nobel gases.

c)

nobel metals.

d)

light metals.

23.

Upto which element, the Law of Octaves was found applicable?

a)

CALCIUM

b)

MAGNESIUM

c)

ALUMINIUM

d)

POTASSIUM

24.

Select the correct arrangement of following elements in doberieners triads Sr, K, Ca, Br, Na, Ba, Cl, I, Li

a)

i) Li Sr K ii) Ca Na Ba iii) Cl Br I

b)

i) Li Na K ii) Ca Sr I iii) Cl Br Ba

c)

i) Li Na K ii) Ca Sr Ba iii) Cl Br I

d)

i) Ca Na K ii) Li Sr Ba iii) Cl Br I

25.

Upto which element, the Law of Octaves was found applicable?

a)

CALCIUM

b)

MAGNESIUM

c)

ALUMINIUM

d)

POTASSIUM

26.

What does the period number in the modern periodic table indicate?

a)
Number of valence electrons in the atom
b)
Number of neutrons in the atom
c)
Number of protons in the atom
d)
Number of electron shells or energy levels
27.

Select the correct arrangement of following elements in doberieners triads Sr, K, Ca, Br, Na, Ba, Cl, I, Li

a)

i) Li Sr K ii) Ca Na Ba iii) Cl Br I

b)

i) Li Na K ii) Ca Sr I iii) Cl Br Ba

c)

i) Li Na K ii) Ca Sr Ba iii) Cl Br I

d)

i) Ca Na K ii) Li Sr Ba iii) Cl Br I

28.

Which of the following elements has the largest atomic size?

a)
Lithium (Li)
b)
Beryllium (Be)
c)
Sodium (Na)
d)
Francium (Fr)
29.

At the time of Mendeleev, the number of elements known was

a)

62

b)

61

c)

63

d)

56

30.

Choose the correct statement from the following:

a)

Mendeleev considered oxides and halides made by elements as criteria for classification

b)

Newland's law of octaves was valid upto the element vanadium

c)

Doberieneer could identify only 5 triads

d)

modern periodic table removed the anomaly of position of isotopes

31.

Up to which element,law of octaves found to be applicable

a)

Oxygen

b)

Calcium

c)

Cobalt

d)

Potassium

32.

The vertical columns on the periodic table are called:

a)

periods

b)

elements

c)

groups

d)

matter

33.

The horizontal rows on the periodic table are called:

a)

periods

b)

elements

c)

groups

d)

matter

34.

Which of the following is not true of Metals?

a)

they make up a majority of elements

b)

they are shiny

c)

they are good conductors

d)

they are poor conductors

35.

True or False? - Nonmetals can be solids, liquids, or gases.

a)

True

b)

False

36.

Which group are the Alkali Metals in?

a)

1

b)

2

c)

17

d)

18

37.

Which group are the Halogens in?

a)

1

b)

2

c)

17

d)

18

38.

What is the significance of the "lanthanides" and "actinides" in the modern periodic table?

a)
The lanthanides and actinides fill the f-block of the periodic table and have unique electronic configurations.
b)
The lanthanides and actinides are radioactive elements.
c)
The lanthanides and actinides are transition metals.
d)
The lanthanides and actinides have similar properties to the alkali metals.
39.

What period is Lead (Pb) in?

a)

6

b)

4

c)

Metals

d)

4A

40.

What are valence electrons?

a)

Any of an atom's electrons

b)

Electrons located on the first energy level

c)

Electrons not attached to any atom

d)

electrons located on the outer energy level

41.
How did Mendeleev arrange the elements?
a)
alphabetical 
b)
density
c)
melting point
d)
atomic mass
42.

Which element is this?

a)

H

b)

He

c)

Li

d)

B

43.

What does the term "periodicity" refer to in the context of the modern periodic table?

a)

The repeating pattern of element properties.

b)
The classification of elements into groups
c)
The number of elements in each period
d)
The arrangement of elements in alphabetical order
44.
Diamonds are a pure form of what element?
a)
Carbon
b)
Oxygen
c)
Silicon
d)
Silver
45.

Number of protons and neutrons

a)

atomic number

b)

atomic mass

c)

noble gases

d)

Non-metals

46.

2 rows beneath the main periodic table

a)

Lanthanide

b)

Lanthanide and Actinide

c)

Lanthanide and Hydrogen

d)

Actinide and Hydrogen

47.

What is one of the merits of Mendeleev's periodic table?

a)
Classification of elements based on atomic number
b)
Identification of isotopes
c)
Explanation of chemical bonding
d)
Successful prediction of undiscovered elements
48.

What is one of the demerits of Mendeleev's periodic table?

a)
It did not accurately predict the properties of all elements.
b)
It did not include all known elements.
c)
It did not account for the existence of isotopes.
d)
It did not organize the elements based on atomic number.
49.

Which aspect of Mendeleev's periodic table is considered a demerit in modern terms?

a)
Did not account for atomic number
b)
Did not consider electron configuration
c)
Did not include noble gases
d)
Did not account for isotopes
50.

What is a key feature of the modern periodic table?

a)
Arrangement of elements in order of increasing atomic mass
b)
Arrangement of elements in order of decreasing atomic number
c)
Arrangement of elements in alphabetical order
d)
Arrangement of elements in order of increasing atomic number
51.

What is the significance of the atomic number in the modern periodic table?

a)
The atomic number represents the atomic mass of an atom.
b)
The atomic number represents the number of electrons in an atom's nucleus.
c)
The atomic number represents the number of protons in an atom's nucleus.
d)
The atomic number represents the number of neutrons in an atom's nucleus.
52.

What is valency?

a)
Valency is the number of protons in an atom.
b)
Valency is the measure of an atom's size.
c)

The number of electrons in the outermost energy level of an atom.

d)
Valency is the ability of an atom to conduct electricity.
53.

If an element has a valency of 3, how many electrons are in its outermost energy level?

a)
6
b)
4
c)
2
d)

3

54.

In the periodic table, as you move from left to right across a period, what generally happens to the atomic size of elements?

a)
The atomic size remains constant.
b)
The atomic size generally increases.
c)
The atomic size generally decreases.
d)
The atomic size fluctuates.
55.

In the periodic table, as you move down a group, what generally happens to the atomic size of elements?

a)
decreases
b)
stays the same
c)
fluctuates
d)
increases
56.
In a chemical equation, is it true that -
a)
the reactant side and product side can have different numbers of atoms for each element
b)
there can be different elements on the reactant side and the product side
c)
an element or compound must be accompanied by a phase change
d)
the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made
57.
The reactants are on the left side of the chemical equation.
a)
True
b)
False
58.
NO2 →N2 + O2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
59.
The force that holds 2 atoms together is called a ________________.
a)
Chemical Reaction
b)
Chemical Bond
c)
Diatomic Chemical
d)
Glue
60.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released 
61.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
62.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
63.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
64.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
65.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
66.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
67.
2 RbNO3 + BeF2 --> Be(NO3)2 + 2 RbF
a)
single displacement
b)
double displacment
c)
decomposition
d)
synthesis
68.

An electric current can produce

a)

heating effect

b)

chemical effect

c)

magnetic effect

d)

all of the above

69.

Pure or distilled water is a

a)

poor conductor

b)

good conductor

c)

Both

d)

None of the above

70.

What is the electronic configuration of sodium (Na)?

a)
1s² 2s² 2p⁶ 3s²
b)
1s² 2s² 2p⁶ 4s¹
c)
1s² 2s² 2p⁶ 3s³
d)
1s² 2s² 2p⁶ 3s¹
71.

Flow of electron is called

a)

Electroplating

b)

Electric current

c)

Electrodes

d)

Electrolyte

72.

conductors can allow electricity because of the presence of

a)

free ions

b)

free electrons

c)

free protons

d)

atoms

73.

Magnetic field inside a long solenoid carrying current is

a)

same at all points (uniform)

b)

different at poles and at the centre

c)

zero

d)

different at all points

74.

An Electric charge in a uniform motion produces

a)

An Electric Field only

b)

An Magnetic field only

c)

Both Electric Field & Magnetic field

d)

Neither of them

75.

A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid will

a)

Increase

b)

Decrease

c)

Remains same

d)

Becomes zero

76.

What direction is the force/motion in the following diagram?

a)

Perpendicular to the magnets

b)

Downwards

c)

Parallel and through the magnets

77.

How does a split ring commutator work?

a)

Swaps the contact evert full turn, so that the left-hand and right-hand arms of the coil always experience a force in the same direction.

b)

Swaps the contact evert half turn, so that the left-hand and right-hand arms of the coil do not experience a force in the same direction.

c)

Swaps the contact evert half turn, so that the left-hand and right-hand arms of the coil always experience a force in the same direction.

78.

The device which is used to detect current is called a:

a)

Galvanometer

b)

Ammeter

c)

Motor

d)

Generator

79.

What is the electronic configuration of Helium (He)?

a)
1s²2s²
b)
2s²2p⁶
c)
2s²2p³
d)
1s²
80.

What is the electronic configuration of carbon (C)?

a)

2,6

b)

2

c)

2,4,8

d)

2,4

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