Chemistry MCQ for 7-8th Class
The smallest particle of an element that retains its properties is called a(n):
1.Atom
2.Molecule
3.Compound
4.Electron
Posted Date:-2023-12-06 11:34:10
What causes capillary action in liquids?
1.Gravitational force
2. Surface tension
3.Viscosity
4.Pressure
Posted Date:-2023-12-06 13:29:19
What gas do plants absorb during photosynthesis?
1. Carbon dioxide
2.Oxygen
3.Nitrogen
4.Hydrogen
Posted Date:-2023-12-06 10:58:55
What happens to the surface tension of a liquid when the temperature increases?
1.Increases
2.Decreases
3.Remains the same
4.Depends on the type of liquid
Posted Date:-2023-12-06 13:30:03
What happens to the volume of a substance when it is heated?
1.Decreases
2.Remains the same
3.Increases
4.Depends on the substance
Posted Date:-2023-12-06 11:08:28
What happens when you mix an acid and a base together?
1. They react to form a gas
2. They cancel each other out
3.They form a salt and water
4.They produce light
Posted Date:-2023-12-06 10:52:25
What is the atomic number of carbon?
1.5
2.12
3.6
4.10
Posted Date:-2023-12-05 16:54:25
What is the chemical formula for carbon dioxide?
1.CO
2.CO2
3.O2C
4.C2O
Posted Date:-2023-12-06 11:35:20
What is the chemical formula for methane?
1.CO2
2.CH4
3.H2O
4.N2
Posted Date:-2023-12-06 11:19:13
What is the chemical formula for table salt?
1.NaCl
2.HCl
3.NaOH
4.CaCl2
Posted Date:-2023-12-06 12:45:25
What is the chemical formula for water?
1.H2O2
2.HO2
3.H2O
4.H3O
Posted Date:-2023-12-06 10:51:09
What is the chemical formula for water?
1.H2O
2.HO
3.H3O
4.O2H
Posted Date:-2023-12-06 11:33:02
What is the chemical name of baking soda?
1.Sodium bicarbonate
2. Sodium chloride
3.Sodium carbonate
4.Calcium carbonate
Posted Date:-2023-12-06 11:05:20
What is the chemical symbol for gold?
1.Au
2.Ag
3.Go
4.Gd
Posted Date:-2023-12-06 12:41:14
What is the chemical symbol for gold?
1.Au
2.Ag
3.G
4.Go
Posted Date:-2023-12-05 14:42:14
What is the chemical symbol for oxygen?
1.O
2.Oc
3.Ox
4.On
Posted Date:-2023-12-06 11:31:40
What is the chemical symbol for Oxygen?
1.O2
2.Oc
3.Ox
4.O
Posted Date:-2023-12-06 10:49:29
What is the chemical symbol for sodium?
1.So
2.Sa
3.Na
4.Sn
Posted Date:-2023-12-06 11:11:17
What is the pH scale used to measure?
1.Temperature
2.Acidity or alkalinity
3.Pressure
4.Volume
Posted Date:-2023-12-06 11:00:28
What is the pH value of a neutral substance?
1.0
2.7
3.14
4.-7
Posted Date:-2023-12-06 12:43:25
What is the process of breakdown of rocks into smaller particles called?
1.Erosion
2.Weathering
3.Sedimentation
4.Deposition
Posted Date:-2023-12-06 11:12:17
What is the process of conversion of a liquid into vapor called?
1.Melting
2.Condensation
3.Sublimation
4.Evaporation
Posted Date:-2023-12-06 11:09:08
What is the process of conversion of a solid directly into vapor called?
1.Melting
2.Condensation
3.Sublimation
4.Evaporation
Posted Date:-2023-12-06 11:07:34
What is the property of a liquid to flow called?
1.Viscosity
2.Density
3.Surface Tension
4.Fluidity
Posted Date:-2023-12-06 13:26:06
What is the SI unit of surface tension?
1.Pascal (Pa)
2.Newton (N)
3.Joule (J)
4.Newton per meter (N/m)
Posted Date:-2023-12-06 13:28:11
What is the smallest unit of an element that still retains the properties of that element?
1.Molecule
2.Atom
3.Compound
4.Cell
Posted Date:-2023-12-06 11:06:02
Which gas do plants use during photosynthesis?
1.Oxygen
2.Carbon dioxide
3.Nitrogen
4.Hydrogen
Posted Date:-2023-12-06 11:36:36
Which gas is most abundant in the Earth's atmosphere?
1.Oxygen
2.Carbon dioxide
3.Nitrogen
4.Hydrogen
Posted Date:-2023-12-06 10:47:56
Which gas is responsible for the blue color of the sky?
1.Oxygen
2.Carbon dioxide
3.Nitrogen
4.Ozone
Posted Date:-2023-12-06 11:01:09
Which gas is responsible for the ozone layer depletion?
1.Oxygen
2.Nitrogen
3.Carbon dioxide
4.Chlorofluorocarbons (CFCs)
Posted Date:-2023-12-06 12:46:57
Which gas is used by plants during respiration?
1. Carbon dioxide
2.Oxygen
3.Nitrogen
4.Hydrogen
Posted Date:-2023-12-06 11:06:48
Which gas supports combustion?
1.Oxygen
2.Carbon dioxide
3.Nitrogen
4.Helium
Posted Date:-2023-12-06 11:09:48
Which metal is liquid at room temperature?
1.Iron
2.Copper
3.Mercury
4.Aluminum
Posted Date:-2023-12-06 10:59:43
Which of the following elements is a metal?
1.Oxygen
2.Chlorine
3.Sodium
4.Nitrogen
Posted Date:-2023-12-06 11:34:42
Which of the following is a characteristic of acids?
1.Sour taste
2.Bitter taste
3.Slippery feel
4.None of the above
Posted Date:-2023-12-06 11:35:57
Which of the following is a chemical change?
1.Melting of ice
2.Dissolving sugar in water
3.Burning of wood
4. Cutting paper
Posted Date:-2023-12-06 11:33:40
Which of the following is a chemical change?
1.Melting ice
2.Cutting paper
3. Burning wood
4.Dissolving salt in water
Posted Date:-2023-12-05 14:41:26
Which of the following is a compound?
1.Hydrogen
2.Oxygen
3.Carbon
4.Water
Posted Date:-2023-12-06 11:10:33
Which of the following is a greenhouse gas?
1.Oxygen
2.Nitrogen
3.Carbon dioxide
4.Hydrogen
Posted Date:-2023-12-06 10:48:32
Which of the following is a greenhouse gas?
1.Oxygen
2.Carbon dioxide
3.Nitrogen
4.Helium
Posted Date:-2023-12-06 12:41:57
Which of the following is a non-metal?
1.Iron
2.Silver
3.Gold
4.Carbon
Posted Date:-2023-12-06 11:32:27
Which of the following is a product of photosynthesis?
1.Oxygen
2.Carbon dioxide
3.Water
4.Glucose
Posted Date:-2023-12-06 12:44:06
Which of the following is a property of metals?
1.Brittleness
2.Dullness
3.Conductivity
4.Lack of luster
Posted Date:-2023-12-06 12:42:52
Which of the following is a property of non-metals?
1.Malleability
2.Conductivity
3.Brittle
4.Shiny surface
Posted Date:-2023-12-06 12:45:59
Which of the following is a pure substance?
1.Air
2.Water
3.Salt
4.Milk
Posted Date:-2023-12-06 11:30:58
Which of the following is an example of a chemical reaction?
1.Cutting paper
2.Boiling water
3. Rusting of iron
4.Melting ice
Posted Date:-2023-12-06 13:22:43
Which of the following is not a state of matter?
1.Solid
2.Gas
3.Plasma
4.Light
Posted Date:-2023-12-06 11:37:19
Which of the following liquids has the highest viscosity?
1.Water
2.Honey
3.Vinegar
4.Milk
Posted Date:-2023-12-06 13:26:39
Which state of matter has a definite shape and volume?
1.Solid
2.Liquid
3.Gas
4.Plasma
Posted Date:-2023-12-06 10:50:07
Which substance is known as the universal solvent?
1.Water
2.Alcohol
3.Vinegar
4.Mercury
Posted Date:-2023-12-06 11:12:54