Chemistry MCQ for 9-10th Class
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
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
The number of atoms in one molecule of oxygen (O2) is:
1.1
2.2
3.3
4.4
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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
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
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
What is the atomic number of carbon?
1.6
2.12
3.14
4.16
Posted Date:-2023-12-06 14:02:25
What is the chemical symbol for iron?
1.Ir
2.Fe
3.Io
4.In
Posted Date:-2023-12-06 13:52:38
What is the chemical symbol for iron?
1.Ir
2.Fe
3.Io
4.In
Posted Date:-2023-12-06 14:00:36
What is the chemical symbol for potassium?
1.P
2.K
3.Pt
4.Ka
Posted Date:-2023-12-06 14:34:04
What is the formula for sulfuric acid?
1.H2SO3
2.H2SO4
3.H2S
4.HSO4
Posted Date:-2023-12-06 14:38:40
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
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
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
Which gas is produced during photosynthesis?
1.Oxygen
2.Carbon dioxide
3.Hydrogen
4.Nitrogen
Posted Date:-2023-12-06 14:27:42
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
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
Which of these elements is a noble gas?
1.Hydrogen
2.Helium
3.Sodium
4.Oxygen
Posted Date:-2023-12-06 14:21:54