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Chemistry

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Published in: Chemistry
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Some model papers of Chemistry of Class 8.

Kajari B / Kolkata

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Qualification: M.Sc.(Botany)

Teaches: Biology, Chemistry, Mathematics, Physics, Bank Clerical, IBPS, SBI Exam, School Service Commission, Hotel Management Entrance, MAT

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  1. Chemistry Sample Paper SECTION - 1 (40 Marks) Attempt all questions from this section. Name the following. I. Il. Ill. IV. 3. 1. 2. 3. 4. 5. Calcium reacts with causticeduritesodatoliberatehydrogen. Name the process by which the bone charcoal is pr par d? Name the substance which speeds up the rate of ch mical rea tion? Name the scientist who proposed the apple p e pudding model of an atom? Name the gas which is used in filling weather balloons? Name the non-metal which is used for making m crochips? State whether the following statements are tr e or false. If false, rewrite the statement. 1. A hydrogen atom has 2 electrons in its valence shell. ( ) 2. The process of electrolysis is us in the silver plating of brass cup. ( ) 4. The nuclear fuel present in star is carbon. ( ) 5. Biogas is a mixture of carbon dioxide, hydrogen and methane. ( ) Balance the given chemical reaction. 1. 2. 3. 4. 5. Zn + H2S04 0 ZnS04 + H. 2H2 + 02 0 H20. NaN03 02 NaN02 + 02. ZnO + 2HN03 -OZn (N03)+ HO. Fe + C12 0 2FeC13. Fill in the blanks. [5] [5] [5] [5] 1. 2. 3. 4. 5. An acid contains and ions and a base contains are found in free state. ions. An atom is the smallest unit of a is the hardest and naturally occurring substance. and are the 4 biochemical catalysts found in human body.
  2. N/A

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