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Observe the given figure showing the orbit of a planet moving around the Sun and write the three laws related to it:
The orbit of a planet moving around the Sun
Concept: Kepler’s Laws
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in ______.
Concept: Classification of Elements
An element has its electron configuration as 2, 8, 2. Now answer the following question.
What is the atomic number of this element?
Concept: The Modern Periodic Table >> Modern Periodic Table and Electronic Configuration of Elements
An element has its electron configuration as 2, 8, 2. Now answer the following question.
To which period does this element belong?
Concept: The Modern Periodic Table >> Modern Periodic Table and Electronic Configuration of Elements
Define corrosion.
Concept: Chemical Properties of Carbon Compounds > Oxidation
Observe the following diagram and answer the questions given below:
- Identify the above diagram. (1)
- Write the principle on which the above appliance works. (1)
- Write the working of the above appliance. (2)
- Write the use of the above appliance. (1)
Concept: Electric Generator
Give a scientific reason.
Simple microscope is used for watch repairs.
Concept: Magnification
Name the following:
Main ore of aluminium.
Concept: Basic Principles of Metallurgy > Extraction of Metals
Define corrosion.
Concept: Chemical Properties of Carbon Compounds > Oxidation
Define corrosion.
Concept: Chemical Properties of Carbon Compounds > Oxidation
Give a scientific reason.
Simple microscope is used for watch repairs.
Concept: Magnification
Objection to Darwin's theory of natural selection.
Concept: Darwin’s Theory of Natural Selection (Darwinism)
Redraw the flow-chart with corrections. Explain in brief the process of obtaining energy through oxidation of carbohydrates, lipids & proteins.
Concept: Production of ATP
Identify my class/phylum and give one example of it:
I live in your small intestine, my body is long and thread like and pseudocoelomate.
Concept: Non Chordates (Invertebrata) >> Phylum: Aschelminthes
Give three examples of physical problems arising due to excessive use of mobile phones.
Concept: Concept of Social Health
Give three examples of activities under the jurisdiction of cyber crime laws.
Concept: Concept of Social Health
What will you do? Why?
Your sister has become incommunicative. She prefers to remain alone.
Concept: Concept of Social Health
Observe the following picture and state what can be the outcome.
Concept: Concept of Social Health
Name the following:
Main ore of aluminium.
Concept: Basic Principles of Metallurgy > Extraction of Metals
Give the structural formula of ethanol.
Concept: Ethanol
