Both calcination and roasting can be performed in (a)reverberatory furnace (b)blast furnace
C)muffle furnace D)electric furnace
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What are the basics on which the industries can be classified?Give atleast two examples of each?
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Calculate the molecular weights of the following molecules: ohy?
(A) Carbon dioxide(B) Carbon monoxide(C) Nitrogen dioxideSolution:
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Assertion (A): All minerals are ores.
Reason (R): Ores are the minerals from which metal can be extracted conveniently and economically.a) Both A and R are true and R is the correct explanation of Ab) Both A and R are true and R is not correct explanation of Ac) A is correct and R is incorrectd) A is incorrect and R is correct.
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Determine the molecular mass of:
(i) ZnSO 7H,(ii) K,CO,Atomic masses : H = 1.00, 0 = 16, C = 12, K = 39, Zn = 65, S = 32Solution:
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2 or
c. Write the word equations for the following reactions.1. Magnesium ribbon or wire burns in air to form magnesium oxide.2. Hydrogen combines with chlorine to form hydrogen chloride,3. Iron is heated with sulphur to form iron sulphide.4. Calcium carbonate when heated decomposes to give calcium oxide and carbon dioxide.5. Molten sodium chloride decomposes to give sodium metal and chlorine gas when electric currentis passed through it.
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Plz help me in this question
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1 Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis(b) Dissolving sugar in water(c) Burning of coal(d) Melting of wax(e) Beating aluminiun to make aluminium foil(f) Digestion of foodState whether the following statements are true or false in case a
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What is the ful form of a.m.u.
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Column - 1
A) AzuriteB) MalachiteC) ChalcopyritesD) CupriteE) MagnesiteF) DolomiteColumn - II1) Sulphide of iron2) Sulphide of copper3) Oxides of copper4) Ore containing carbonate of copper5) Ore of magnesium6) Carbonate ore A B C D E F(a) 4 4 2 3 5 6(b) 3 4 1 2 5 6(c) 4 4 2 2 6 5(d) 3 2 4 1 6 5
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The symbol Cu is the symbol fora. ironb. copperc. Krypton
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Write the names and numbers of atoms of the elements each of these compounds are made up of. The first one has been done for you:-
1. CO² (carbon dioxide): 1 atom of carbon + 2 atoms of oxygen.3. CuSO⁴ (copper sulphate): ________
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The highly electropositive elements are
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What is China rose and why it is used as indicators
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The element(s) with valency 1 is / area. hydrogen b.flourine c.sodium d.magnesium
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