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Define ‘redox reaction’. Give one example.
Concept: Chemical Properties of Carbon Compounds > Oxidation
Define corrosion.
Concept: Chemical Properties of Carbon Compounds > Oxidation
Write names of first four homologous series of alcohols.
Concept: Homologous Series
State the importance of Space Missions.
Concept: Concept of Space Missions
Define ‘redox reaction’. Give one example.
Concept: Chemical Properties of Carbon Compounds > Oxidation
Define corrosion.
Concept: Chemical Properties of Carbon Compounds > Oxidation
- Complete the given chemical reaction:
\[\ce{CuSO4_{(aq)} + Fe_{(s)} ->}\] _______ + _______ - Name the type of the reaction.
Concept: Types of Chemical Reactions > Single Displacement Reaction
The chemical reaction in which two or more products are formed from a single reactant is called ______ reaction.
Concept: Types of Chemical Reactions > Decomposition Reaction
Write two applications of sodium bicarbonate (baking soda).
Concept: Important Salts in Daily Life >> Preparation and Uses of Baking Soda
Give a scientific reason:
For electric power transmission, copper or aluminium wire is used.
Concept: Heating Effect of Electric Current
The device used for producing electric current is called _________.
Concept: Electromagnetic Induction
Write any three properties of magnetic lines of force.
Concept: The Bar Magnet
Name the following diagram and explain the concept behind it.
Concept: Electromagnetic Induction
Given below is a diagram showing a defect of human eye. Study it and answer the following questions.
(i) Name the defect shown in the figure.
(ii) Give reason for this defect of eye in human being.
(iii) Name the type of lens used to correct the eye defect.
Concept: Defects of Vision and Their Corrections > Myopia
Complete the following table for convex lens:
| Sr. No. | Position of the object | Position of the image | Nature of the image |
| 1. | Beyond 2F1 | __________________ | ________________________ |
| 2. | __________________ | At infinity | ________________________ |
| 3. | __________________ | __________________ | Real, inverted and enlarged |
Concept: Images Formed by Sperical Lenses
What is refraction of light?
Concept: Refraction of Light
Fill in the blank:
Very fine particles mainly scatter ………… colored light.
Concept: Some Natural Phenomena Due to Sunlight
Choose the correct alternative and rewrite the following sentence.
A ray of light strikes the glass slab at an angle of 50°. What is the angle of incidence?
Concept: Refraction of Light Through a Rectangular Glass Block
Choose the correct alternative and rewrite the following sentence.
A ray of light strikes the glass slab at an angle of 50°. What is the angle of incidence?
Concept: Refraction of Light Through a Rectangular Glass Block
Draw the diagram of refraction of light in the glass slab
Concept: Refraction of Light Through a Rectangular Glass Block
