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WorksheetsTCS GCA's - Science Quiz # 1 - for grade 11 (Pre Eng)
Total questions: 45
Worksheet time: 45mins
Which statement is correct?
Infra-red radiation cannot travel in a vacuum.
Infra-red radiation cannot travel in solids or in gases.
Infra-red radiation can only travel in a vacuum.
Infra-red radiation can travel in a vacuum and in gases.
An echo sounder produces ultrasound of frequency 24 kHz. The ultrasound travels in water at speed of 1.5 km / s.
What is the wavelength in water of ultrasound of this frequency?
0.063 m
16 m
36 m
63 m
1 A loudspeaker produces a sound wave of frequency 50 Hz. The amplitude of the sound wave is increased.
What is heard?
a louder sound of a higher pitch
a louder sound of the same pitch
a sound of higher pitch but the same loudness
a sound of the same pitch and loudness as before
Some of the liquid in a dish evaporates, as shown in the diagrams.
Which molecules leave the liquid and which molecules in the liquid have greater average kinetic energy?
A
B
C
D
What is the tendency of an object to resist a change in motion?
force
motion
inertia
gravity
Motion is the result of ____ force
balanced
no
unbalanced
forward force
While you’re ice-skating with your friends, you push off from one end of the rink and slide forward. Based on Newton’s first law of motion, what is true?
You will lose your balance and fall over before you reach the middle of the ice rink.
You will continue to slide across the ice until a force makes you stop or change direction.
The force of gravity will make you keep your velocity until your friends make you stop.
The size of your ice skates will determine how quickly or slowly you travel across the ice
An element X forms a positive ion with the electronic structure 2,8,8. What is the proton (atomic) number of X?
16
17
18
19
What answer selection best describes the rows of the Periodic Table?
Periods
Groups
Representative Elements
Transition Elements
Which two substances are elements with a giant molecular structure?
diamond and graphite
diamond and sand
methane and iodine
methane and sand
Which gas contains the same number of molecules as 9g of water?
2g of hydrogen
14g of nitrogen
32g of oxygen
44g of carbon dioxide
The mass of one mole of a chloride formed by a metal Y is 74.5g. What is the formula of the chloride?
Y3Cl
Y2Cl
YCl
YCl 2
What is not an example of oxidation?
converting iron(III) salts into iron(II) salts
converting magnesium atoms into magnesium ions
dissolving of a copper anode during electrolysis
liberating chlorine from a chloride
What is the concentration of iodine, I2, molecules in a solution containing 2.54g of iodine in 250cm3 of solution?
0.01mol/ dm3
0.02mol/ dm3
0.04mol/ dm3
0.08mol/ dm3
The equation for the burning of hydrogen in oxygen is shown below.
2H2(g) + O2(g) ----> 2H2O(g)
Which information does this equation give about the reaction?
36g of steam can be obtained from 16g of oxygen.
2g of hydrogen combine with 1g of oxygen.
2mol of steam can be obtained from 1mol of oxygen.
2 atoms of hydrogen combine with 2 atoms of oxygen.
Which change will increase the speed of the reaction between 1 mol of each of the gases, X and Y?
a decrease in surface area of the catalyst
a decrease in temperature
a decrease in the volume of the reaction flask
an increase in the volume of the reaction flask
Which oxide can be reduced to the metal by hydrogen?
calcium oxide
copper(II) oxide
magnesium oxide
sodium oxide
124 g of phosphorus vapour has the same volume as 71 g of chlorine gas at the same temperature and pressure.
What is the formula of a molecule of phosphorus?
P8
P4
P2
P
In which change is the nitrogen reduced?
NH3 to NO
NH3 to NO3 –
N2 to NH3
N3– to N2
Which gas burns in air to form a single product?
ammonia
carbon monoxide
hydrogen chloride
methane
A student tested a solution by adding aqueous sodium hydroxide.
A precipitate was not seen because the reagent was added too quickly. What could not have been present in the solution?
Al 3+
Ca2+
NH4 +
Zn2+
The empirical formula of a liquid compound is C2H4O. To find the empirical formula, it is necessary to know the
density of the compound.
percentage composition of the compound.
relative molecular mass of the compound.
volume occupied by 1 mole of the compound.
The number system that has base digits 0 and 1 is called __________________________ number system?
Binary
Denary
Hexadecimal
What type of device is this?
INPUT DEVICE
OUTPUT DEVICE
STORAGE DEVICE
PROCESSING DEVICE
The example of an operating system is
MS-Paint
Windows 7
Photoshop
A group of eight bits is known as
bit
byte
bite
kilo bit
RAM and ROM are the example of ___________________________ type of memory?
Primary
Secondary
Offline
Online
SSD and HDD are the examples of ___________________ type of memory?
Primary
Secondary
Extra
Cloud
Visual basic and Python are the examples of _______________ type of languages?
Low-level
High-level
Machine code
Middle-level
Flowchart is pictorial representation of an algorithm?
True
False
______________computer architecture has three base components CPU, Memory and Buses
Von neuman
Charles babbage
John Vincent
________________operaring system is very popular in portable devices cellphones and tablets
Windows
Android
Linux
MS DOS
_________________ language use mnemonics like commands
Assembly
High-level
English
Chinese
_________________ is a number that is assigned by a network every time computer is connects to the internet
IP Address
MAC Address
Physical Address
Networking Address
USB Stands for?
Universal standard bus
Universal serial bus
Universal support bus
Universal storage bus
External Hard disk and Memory cards are an example of _______________ storage
Primary
Secondary
offline
Cloud
LAN stands for
Large area network
Local area network
Literal area network
Lightest area network
