꧁sᴄɪᴇɴᴄᴇ ᴘᴀᴄᴋᴀɢᴇ꧂

Question 1

SI unit for temperature is degree Celsius (°C)

Accepted Answer

False

Question 2

Which of the following statements about methane is correct?

Accepted Answer

Methane has four single covalent bonds.

Question 3

Mass is a _________?

Accepted Answer

The amount of substance in a body

Question 4

Which answer best describe differences between fractional distillation and distillation method of purification?

Accepted Answer

They seperate differently by their boiling points

Question 5

When the type of equillibrium is neutral, the base area is is the same.

Accepted Answer

False

Question 6

How many pair of electrons are shared in a molecule of water?

Accepted Answer

Two

Question 7

Which of these elements has a chemical symbol of only one letter?

Accepted Answer

Sulfur

Question 8

Which apparatus measure volume of liquid *approximately* according to graduated marks on the apparatus?

Accepted Answer

Beaker

Question 9

Radon(Rn) is metallic from the periodic table.

Accepted Answer

False

Question 10

Isotopes are atoms of the same element having the same number of protons but different number of neutrons

Accepted Answer

True

Question 11

Which of the following pairs of elements form a compound by t̲r̲a̲n̲s̲f̲e̲r̲r̲i̲n̲g̲ electrons between elements?

Accepted Answer

Potassium and Chlorine

Question 12

Gas has fixed volume

Accepted Answer

False

Question 13

Figure 5.10 shows ___________ equilibrium.

Accepted Answer

Neutral

Question 14

Which sentence describe best about mixture?

Accepted Answer

The ratio of these substances in a mixture are not fixed

Question 15

What is the chemical name for FeN?

Accepted Answer

Iron(III) Nitride

Question 16

In which of these covalent compounds is the number of electrons shared the least?

Accepted Answer

Chlorine gas

Question 17

What is the element symbol for Lead?

Accepted Answer

Pb

Question 18

Which of the following elements will form an ion with the same electronic figure as Argon?

Accepted Answer

Chlorine

Question 19

Which statement is incorrect?

Accepted Answer

Some elements can be broken down into simpler substances

Question 20

Non-uniform acceleration = Non-constant time

Accepted Answer

False

Question 21

Micrometer screw gauge measures less than 2cm and has accuracy of 0.01cm.

Accepted Answer

False

Question 22

Which of the following atoms does not tend to form a cation?

Accepted Answer

Nitrogen

Question 23

Elements are arranged in order of ________ proton numbers in the Periodic Table.

Accepted Answer

Increasing

Question 24

What is the chemical formula for lithium hydroxide?

Accepted Answer

LiOH

Question 25

The process from gas to solid is sublimation

Accepted Answer

False

Question 26

The weights of different masses on four planets are shown. Which planet has the greatest gravitational field strength?

Accepted Answer

B

Question 27

Which of the following is used to collect gasses which are denser than air?

Accepted Answer

Downward delivery

Question 28

When a magnesium atom forms a magnesium ion, it ____________

Accepted Answer

Loses two electrons

Question 29

There are 11 protons, 23 electrons and (23-11) = 12 neutrons

Accepted Answer

False

Question 30

Chemical name for CO is __________?

Accepted Answer

Carbon monoxide

Question 31

Combined science means Physics + Chemistry

Accepted Answer

False

Question 32

Which of the following atoms does not tend to form a cation?

Accepted Answer

Nitrogen

Question 33

Venus, Mercury, Mars and Jupiter can e̳a̳s̳i̳l̳y̳ be seen with naked eye at night. (When you know where to look)

Accepted Answer

True

Question 34

Watch/Clock has more accuracy than stopwatch

Accepted Answer

False

Question 35

A metre ruler is used to measure several metres (m)

Accepted Answer

False

Question 36

The melting/boiling point of Ionic bonding is low while the covalent bonding melting/boiling point is high.

Accepted Answer

False

Question 37

Ionic compounds can conduct electricity when molten and in aqueous solution.

Accepted Answer

True

Question 38

Which of the following pairs of elements form a compound by s̲h̲a̲r̲i̲n̲g̲ electrons?

Accepted Answer

Carbon and Chlorine

꧁sᴄɪᴇɴᴄᴇ ᴘᴀᴄᴋᴀɢᴇ꧂

Questions 38

꧁sᴄɪᴇɴᴄᴇ ᴘᴀᴄᴋᴀɢᴇ꧂

Questions 38