Chemistry: MCQ Test (25 questions)

Question 1 of 25

In the oxidation reaction, the ratio of electronegative element or group is ____

Athere is a shortage
BThere is an increase
Cnever increasing
Dnone of these

Question 2 of 25

Nitrous oxide is the chemical name of which of the following?

Atear gas
Bmosquito repellent
Claughing gas
Dfire extinguisher

Question 3 of 25

Paint applied on the surface of iron prevents it from rusting because it

Areacts chemically with iron
BPrevents carbon dioxide from coming into contact with iron
CChanges the rate of chemical reaction of iron
DPrevents oxygen and moisture from coming into contact with the iron

Question 4 of 25

Carbon atoms have ______

A6e. 6p and 12n
B6e. 6p and 6n
C6e. 12p and 6n
D12e, 6p and 6n

Question 5 of 25

An atom has a mass number of 23 and an atomic number of 11. Find the number of protons.

A23
B22
C12
D11

Question 6 of 25

The uncertainty principle was formulated by-

AEinstein
BHeisenberg
CRutherford
DPaulie

Question 7 of 25

Souring of milk into curd is an example of-

Asaponification
BPooyan
CFermentation
DEsterification

Question 8 of 25

Non-metals are generally bad conductors of electricity, but graphite is a good conductor of electricity because_

AIt is a carbon model
BIt has loose electrons
CIt is brittle
DIt forms primary oxides

Question 9 of 25

Who first said that hydrogen is an essential component of all acids?

AArrhenius
BBronsted
CDavy
DLullaby

Question 10 of 25

Graphene is ____

Acarbon alloy
BNanomodel of carbon
Cisotope of carbon
DNone of these

Question 11 of 25

Which of the following is an aldehyde?

APropine
BPropanone
CPropanal
DPropanol

Question 12 of 25

The most reactive among the halogens is ____

AFluorine
Bchlorine
Cbromine
DIodine

Question 13 of 25

Which of the following statements is/are correct? 1. Acids taste sour and release H' ions. 2. Acids taste sour and release OH ions. 3. Bases taste bitter and release OH ions. Code:

AOnly 1 and 3.
B1 and 2 only
C2 and 3 only
D1, 2 and 3 all

Question 14 of 25

Which of the following is a semiconductor?

Aplastic
Baluminum
CWood
DGermanium

Question 15 of 25

Which of the following gases dissolves in water to form an acidic solution?

Acarbon dioxide
Boxygen
Cnitrogen
Dhydrogen

Question 16 of 25

The explosion of a firecracker is an example of

Aevaporation
Bcombustion
Cprecipitation
Ddecomposition

Question 17 of 25

What is the pure form of carbon?

ADiamond
Bgraphite
CCharcoal
DFullerene

Question 18 of 25

Which is the most abundant gas in the atmosphere on the basis of percentage?

Anitrogen
Bcarbon dioxide
Chydrogen
Doxygen

Question 19 of 25

Which substance acts as a poison for the Pt catalyst in the contact process of manufacturing sulfuric acid?

ASulphur
Barsenic oxide
CCO²
Darsenic sulfide

Question 20 of 25

Gasohol, which is used as fuel in motor vehicles, is a mixture of ____

Aof methane and alcohol
Bpetrol and alcohol
Cof hydrogen and alcohol
Dnatural gas and alcohol

Question 21 of 25

Hydrogen was discovered by whom?

ACharles
BKevendrash
CPriestley
DBoyle

Question 22 of 25

Carbon has an atomic number of 6 and an atomic weight of 12. How many protons are in its nucleus?

A6
B12
C18
D0

Question 23 of 25

The chemical formula of Hypo is-

ANa² S² O³ SH²O
BNa²S²O³ 3H³O
CNa²S² O³ 2H²O
DNa²SO⁴ 10H² O

Question 24 of 25

Who is called the father of aromatic compounds?

Amethane
Bbenzene
CPhenol
DAniline

Question 25 of 25

Sodalime is a mixture of what?

AKOH + CaO
BNaOH CO
CNa²CO³+ CaO
DCaCO³ + NaOH