Chemistry/Chemistry MCQ for 9-10th Class Sample Test,Sample questions

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Question: 
The atomic number of an element is determined by the number of:

1.Electrons

2.Protons

3.Neutrons

4.Positrons

Posted Date:-2023-12-06 14:40:50

Question: 
The elements in the same group of the periodic table have:

1.Different numbers of protons

2.Different numbers of neutrons

3.Similar chemical properties

4.The same atomic mass

Posted Date:-2023-12-06 14:29:59

Question: 
The number of atoms in one molecule of oxygen (O2) is:

1.1

2.2

3.3

4.4

Posted Date:-2023-12-06 14:36:29

Question: 
The pH scale measures the acidity or basicity of a substance. A pH value of 7 indicates:

1.Strong acidity

2.Neutral solution

3.Strong basicity

4.Weak acidity

Posted Date:-2023-12-06 14:21:25

Question: 
The process of conversion of a solid directly into vapor without passing through the liquid state is called:

1.Sublimation

2.Evaporation

3.Condensation

4.Fusion

Posted Date:-2023-12-06 14:03:15

Question: 
The smallest particle of an element that retains its chemical properties is called:

1.Compound

2.Molecule

3.Atom

4.Proton

Posted Date:-2023-12-06 13:51:35

Question: 
What is the atomic number of carbon?

1.6

2.12

3.14

4.16

Posted Date:-2023-12-06 14:02:25

Question: 
What is the chemical symbol for iron?

1.Ir

2.Fe

3.Io

4.In

Posted Date:-2023-12-06 13:52:38

Question: 
What is the chemical symbol for iron?

1.Ir

2.Fe

3.Io

4.In

Posted Date:-2023-12-06 14:00:36

Question: 
What is the chemical symbol for potassium?

1.P

2.K

3.Pt

4.Ka

Posted Date:-2023-12-06 14:34:04

Question: 
What is the formula for sulfuric acid?

1.H2SO3

2.H2SO4

3.H2S

4.HSO4

Posted Date:-2023-12-06 14:38:40

Question: 
What is the formula for the compound formed between calcium and chlorine?

1.CaCl

2.CaCl2

3.Ca2Cl

4.Ca2Cl2

Posted Date:-2023-12-06 14:27:07

Question: 
What is the process of conversion of a gas into a liquid called?

1.Condensation

2.Evaporation

3.Sublimation

4.Solidification

Posted Date:-2023-12-06 14:39:57

Question: 
Which gas is most abundant in the Earth's atmosphere?

1.Nitrogen

2.Oxygen

3.Carbon dioxide

4.Argon

Posted Date:-2023-12-06 14:20:04

Question: 
Which gas is produced during photosynthesis?

1.Oxygen

2.Carbon dioxide

3.Hydrogen

4.Nitrogen

Posted Date:-2023-12-06 14:27:42

Question: 
Which of the following is NOT a greenhouse gas?

1.Compound

2.Molecule

3.Atom

4.Proton

Posted Date:-2023-12-06 13:57:58

Question: 
Which of the following is NOT a greenhouse gas?

1. Carbon dioxide

2.Methane

3.Nitrogen

4.Water vapor

Posted Date:-2023-12-06 14:01:48

Question: 
Which of these elements is a noble gas?

1.Hydrogen

2.Helium

3.Sodium

4.Oxygen

Posted Date:-2023-12-06 14:21:54

Posted on by R4R Team

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