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धातूनाम् अव्ययानां च विशिष्टविभक्तेः उपयोगं कृत्वा वाक्यनिर्माणं कुरुत।
अधः
Concept: वाक्यरचना
5-7 वाक्यात्मकं निबन्धं लिखत।
मम प्रियं पुस्तकम्।
Concept: निबन्धलेखनम्
5-7 वाक्यात्मकं निबन्धं लिखत।
मम प्रिया भाषा।
Concept: निबन्धलेखनम्
सूचनानुसारं कृती: कुरुत।
मृगः प्रत्यहं तत्र गत्वा सस्यम् अखादत्। (त्वान्त-अव्ययं निष्कासयत।)
Concept: व्याकरणवीथि [दशमी कक्षा]
सङ्ख्याः अक्षरैः लिखत।
१६
Concept: व्याकरणवीथि [दशमी कक्षा]
Solve the problem.
If the mass of a planet is eight times the mass of the Earth and its radius is twice the radius of the Earth, what will be the escape velocity for that planet?
Concept: Free Fall
Give scientific reasons for the following:
Atomic radius goes on decreasing while going from left to right in a period.
Concept: Periodic Properties >> Atomic Size
Write a scientific reason.
Atomic radius goes on increasing down a group.
Concept: Periodic Properties >> Atomic Size
Write scientific reason.
Elements belonging to the same group have the same valency.
Concept: Periodic Trends in the Modern Periodic Table
An element has its electron configuration as 2, 8, 2. Now answer the following question.
What is the group of this element?
Concept: The Modern Periodic Table >> Modern Periodic Table and Electronic Configuration of Elements
State the modern periodic law.
Concept: The Modern Periodic Table
Define ‘redox reaction’. Give one example.
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
Observe the following figure and write the answer of the question.
- Which process is shown in the figure?
- Explain the chemical reaction shown in the figure.
- Write the reactions on anode and cathode.
Concept: Corrosion of Metals
