JSIERT

What is Plane Mirror? Write uses of Plane Mirror?

Plane mirror Definition “A smooth shiny surface of flat glass with silver coating covered by Red or, brown paint, which reflects light is called a mirror.“ Use of plane mirrors (i)It is used as looking glass on the dressing table. (ii)Plane mirrors also have many scientific uses. In most of the measuring instruments. (iii) Plane …

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What are the uses of Concave mirrors?

Concave Mirrors By reflecting light, concave mirrors produce virtual, erect, enlarged objects that are closer to the mirror’s pole than the focal length and real, inverted images of objects that are farther away from the focus. Uses of Concave Mirrors (i)Concave mirrors are used in torches, searchlights, and headlights of vehicles.(ii)Concave mirrors are also used …

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Difference between Regular and Irregular Reflection.

Difference between Regular and Irregular Reflection. Regular Reflection. Irregular Reflection. It occurs when all the reflected rays from a given smooth surface are parallel to the parallel incident rays. It occurs when for a given set of parallel incident rays, the reflected rays do not remain parallel to each other. This occurs from smooth surfaces …

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Fe2O3 + 2Al → Al2O3 + 2Fe The above reaction is an example of a (i)Combination reaction (ii)Double displacement reaction (iii)Decomposition reaction (iv)Displacement reaction Solution:

(iv)Displacement reaction Reason: To create aluminium oxide, oxygen from ferrous oxide is transferred to aluminium metal. Aluminum is a more reactive metal than Fe in this reaction. Al will therefore remove Fe from its oxide. One of the elements displaces another in a chemical process known as a displacement reaction. More reactive metal here replaces …

Fe2O3 + 2Al → Al2O3 + 2Fe The above reaction is an example of a (i)Combination reaction (ii)Double displacement reaction (iii)Decomposition reaction (iv)Displacement reaction Solution: Read More »

Which of the statements about the reaction below are incorrect?
2PbO(s) + C(s) → 2Pb(s) + CO2(g)
(a) Lead is getting reduced
(b) Carbon Dioxide is getting oxidised
(c) Carbon is getting oxidised
(d) Lead oxide is getting reduced
(i) (a) and (b)
(ii) (a) and (c)
(iii) (a), (b) and (c) (iv) all the above

(j) (a) and (b) Explanation: (a) Because oxygen is being removed . and (b) Because the elemental Carbon is being given more oxygen removed from  Lead.