Write electronic configuration of Aluminium and Sulphur.
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December 2022
Identify the metals and metalloids in the following elements : Sodium (Na), Silicon (Si), Germanium (Ge), Lithium (Li).
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December 2022
Write the balanced chemical equation for the following reaction : Barium chloride + Aluminium sulphate Barium sulphate + Aluminum chloride
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December 2022
Which property did Dobereiner use to classify the elements ? Give example.
The resistance of a uniform metallic conductor depends on :
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December 2022
Element X forms a chloride with the formula XCl2 . X would most likely be in the same group of the periodic table as : (a) Na (b) Mg (c) Si (d) Al
What are the disadvantages of fossil fuel ? Explain in brief.
my father said to me why have you failed Change into indirect
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December 2022
The cloudiness or milky condition of the crystalline lens of a person shows which defect of the eye
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December 2022
You must have come across the three 'R's to save the environment : Reduce, Recycle and Reuse. Explain Reduce in detail.
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December 2022
Which of the following is exothermic reaction ? (A) Decomposition of calcium carbonate by heat (B) Decomposition of silver chloride by sunlight (C) Decomposition of vegetable matter into compost (D) Decomposition of lead nitrate by heat
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December 2022
Explain the following in context of metals : (1) Malleability (2) Ductility (3) conductor of heat and electricity (4) sonorous
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December 2022
Why should curd and sour substances not be kept in Brass and Copper vessels ?
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December 2022
Name the substance which on treatment with chlorine yields bleaching powder : (A) Gypsum ) ( 2. CaSO 4 H2O (B) Slaked lime [ ( ) ] Ca OH 2 (C) Quick lime (CaO) (D) Lime stone )
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Asked:
December 2022
Use Mendeleef's Periodic Table to predict the formulae for the oxides of the following elements : K, C, Al, Si