Chemistry

Question 1

Aluminium is extracted from

Accepted Answer

Bauxite

Question 2

ElementX, the electronic configuration 2,8,2 and element Y with electronic configuration 2,8,7 are likely to combine by

Accepted Answer

Electovalent bonding

Question 3

Which element form ozone?

Accepted Answer

Oxygen

Question 4

CFCs means

Accepted Answer

Chlorofluorocarbons

Question 5

According to Le Chatelier air composition can be represented by formula

Accepted Answer

Not true

Question 6

The strongest hydrogen bonds are in

Accepted Answer

H2F2

Question 7

Hydrogen burn with ___ non luminous flame.

Accepted Answer

Pale blue

Question 8

The simplest formula of a compound is__

Accepted Answer

Empirical formula

Question 9

Matter is categorised into how many

Accepted Answer

3

Question 10

Chlorine belongs to which group and period respectively

Accepted Answer

7 and 3

Question 11

Air contain these except

Accepted Answer

Carbon

Question 12

How many zone can be identified in a candle flame?

Accepted Answer

3

Question 13

The Valence electrons of the element 12Mg are in the

Accepted Answer

3S orbital

Question 14

Petrol consists mainly of

Accepted Answer

Hydrocarbons

Question 15

The lightest element is

Accepted Answer

Hydrogen

Question 16

Which of the following can undergo both addition and substitution reactions

Accepted Answer

Benzene

Question 17

What is used in gas balloons as gas

Accepted Answer

Helium

Question 18

An atom with 17 protons, 17 electrons and 18 neutrons has a mass number of

Accepted Answer

35

Question 19

When alkanols react with sodium, the gas evolved is

Accepted Answer

Hydrogen

Question 20

The general formula for monosaccharides is

Accepted Answer

C6H12O6

Question 21

Which component of Air is 0.03%?

Accepted Answer

Carbon dioxide

Question 22

Which of these has high melting and boiling point

Accepted Answer

NaCl

Question 23

The standard scale for measuring temperature is

Accepted Answer

Kelvin

Question 24

Another name for Disaccharides is

Accepted Answer

Reducing sugars

Question 25

If an element R belongs to the same group as sodium, an aqueous solution of ROH will

Accepted Answer

Have pH greater than 7

Question 26

Group 7 elements are called.

Accepted Answer

c. Halogen

Question 27

The corrosion of Iron is known as

Accepted Answer

Rusting

Question 28

How many gas laws do we have in chemistry?

Accepted Answer

9

Question 29

Which of these increases with increase in electron number

Accepted Answer

Van Der Waals

Question 30

Oxygen has how many Valence electrons?

Accepted Answer

6

Question 31

Which element fit this description: colourless, odourless and tasteless

Accepted Answer

A and C

Question 32

All except one has a valency of 0

Accepted Answer

H

Question 33

_____ is a region where gases combine chemically with the production of heat and light

Accepted Answer

Flame

Question 34

Which shell has its maximum number of electrons to be 18?

Accepted Answer

M

Question 35

Which of the following alkanes has the highest boiling point

Accepted Answer

Hexane

Chemistry

Questions 35

Chemistry

Questions 35