Download App

Science Distinguish between

Elements, Compounds and Mixtures · Maharashtra Board STD 7 (MSBSHSE - Semi English Medium). 4 questions.

Questions

Distinguish between

Take a timed test

4 questions · self-marked practice — reveal the answer and mark yourself.

Question 14 Marks
Separation by distillation and Separation by separating funnel
Answer
Separation by distillationSeparation by separating funnel
1. Distillation is used for purification of impure liquids, for separating liquid and solids (Separation of mixture containing two miscible liquids) e.g. to separate salt and water from saltwater.1. This procedure is used for separating two liquids e.g. separating oil and water, (two immiscible liquids)
View full question & answer→
Question 24 Marks
Atoms and Molecules
Answer
AtomsMolecules
1. An atom is the fundamental part of matter.1. A molecule is a group of chemically bonded atoms.
2. Atoms are basic building blocks of matter.2. Molecule is the smallest unit of a chemical compound
3. It is foundation of molecules.3. It is foundation of chemical compound.
View full question & answer→
Question 34 Marks
Mixture and Compound
Answer
Mixture Compound
1. The different substances are not chemically joined together to form a mixture but mixed physically. 1.A compound is formed when two or more elements chemically combine together e.g. $H _2 O \rightarrow$ chemical formula of water.
2. Each substance in the mixture retains its own properties 2. Compound has fixed properties.
3. Mixtures are impure substances. 3. Compounds are pure substances.
4. Substances from the mixture can easily be separated by physical methods. 4. The constituents of a compound can be separated only by chemical methods.
5. The constituents of a mixture are present in varying proportions. 5. The constituents of a compound are present in fixed proportion.
View full question & answer→
Question 44 Marks
Metals and Non-metals
Answer
MetalsNon-metals
1. Metals are good conductors of heat and electricity.1. Non-metals are poor conductors of heat and electricity.
2. Metals are solids at room temperature except for mercury.2. Non-metals exists in all three states.
3. Metals are lustrous, (shiny)3. Non-metals are not lustrous, (dull appearance) except graphite.
4. Metals are malleable (can be hammered into sheets)4. Non-metals are brittle, not malleable.
5. Metals are ductile, can be drawn into wire.5. Non-metals are not ductile.
6. Metals are very hard and strong.6. Non-metals are brittle, will break down into pieces except diamond.
View full question & answer→
Generate Paper FreeAll Elements, Compounds and Mixtures topics