Botulinum toxin type A এর কাজ, ব্যবহারের নিয়ম

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....

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)...

(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...

(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)...

Non-metals combine with oxygen to form acidic oxides. For example:S(s)+O2(g) → SO2 (g)

(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...

(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.

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...

(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...

[Hint :   (a) By dilution test                (b) By dye test]