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What is type metal?
In printing, type metal (sometimes called hot metal) refers to the metal alloys used in traditional type founding and hot metal typesetting. Lead is the main constituent of these alloys....
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Write the balanced chemical equation for the following and identify the type of reaction in each case.
Answer (a) 2KBr (aq) + BaI2 (aq) → 2KI (aq) + BaBr2 (s): Double displacement reaction (b) ZnCO3 (s) → ZnO (s) + CO2 (g): Decomposition reaction (c) H2 (g) + Cl2 (g) → 2HCl (g): Combination reaction (d) Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)...
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Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.
(a) N2(g) + 3H2(g) + Catalyst(773 K) → 2NH3(g) Combination reaction (b) NaOH(aq) + CH3COOH(aq) → CH3COONa(aq) + H2O(l) Double displacement reaction/Neutralisation reaction (c) C2H5OH(l) + CH3COOH(l) + H+ → CH3COOC2H5(l) + H2O(l) Double displacement...
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Write the balanced chemical equations for the following reactions and identify the type of reaction in each case
(a) Fe2O3(s) + 2Al(s) ⎯→ Al2O3(s) + 2Fe(l) + Heat Displacement reaction/Redox reaction (b) 3Mg(s) + N2(g) ⎯→ Mg3N2(s) Combination reaction (c) 2KI(aq) +Cl2(g) ⎯→ 2KCl(aq) + I2(s) Displacement reaction (d) C2H5OH(l) + 3O2(g) ⎯→ 2CO2(g)...
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What type of oxides is formed when non-metals combine with oxygen?
Non-metals combine with oxygen to form acidic oxides. For example:S(s)+O2(g) → SO2 (g)
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Name the type of mirror used in the following situations.
(a) Concave (b) Convex (c) Concave Explanation (a) Concave mirror is used in the headlights of a car. This is because concave mirrors can produce powerful parallel beam of light when the light source...
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Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because −
(c) toxin is inactive: In bacteria, the toxin is present in an inactive form, called prototoxin, which gets converted into active form when it enters the body of an insect.
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Classify each of the following as either a p-type or n-type semi-conductor
Hint : (a) Ge is group 14 element and In is group 13 element. Therefore, an electron deficit hole is created. Thus semiconductor is p-type. (b) Since B is group 13 element...
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Classify each of the following as being either a p-type or an n-type semiconductor: (i) Ge doped with In
(i) Ge (a group 14 element) is doped with In (a group 13 element). Therefore, a hole will be created and the semiconductor generated will be a p-type semiconductor. (ii) B (a...
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How can the two emulsions can be distinguished : (a) oil in water type (o/w) and (b) water in oil type (w/o)
[Hint : (a) By dilution test (b) By dye test]
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