Question

CHEMISTRY
MOME: 27 MARI
1. Write the chemical formula and balance the following chemical equation
Aluminium sulphate+barium chloride --barium sulphate +alum chloride (1)
2. Name two amphoteric oxides (1)
3. Identify the oxidizing and reducing agent in the following reaction
Zno +C -Zn+co (1)
4. Draw the electron dot structure of CO, molecule. (1)
5. Why hydrogen gas is not released when nitric acid reacts with metals? (1)
6. A metal oxide gives SO2 gas on heating. What type of ore it is name the process used for the
concentration of this ore. (2)
7. What is an alkali? Give two examples of weak acids (2)
8. What happens when green vitriol is heated write the reaction involved and products formede
9. A compound X is used in hospitals for setting the fractured bones identify the compound. W
chemical formula, chemical name and method of preparation (3)
10.Give reasons-3)
तित
सुविधा
पुनः अ
() - aluminium metal is resistant to corrosion
(i)- blue aqueous copper sulphate solution becomes green when iron mod is coped in
(m)- tarnished copper vessels are made shiny by rubbing tamarind or lemon
11. What happens when dilute HCl is added on egg shell. Name the gas evolved. Also give the che
along with reaction to test the gas evolved (3)
12.Explain (3)
(i)-thermite reaction
(1)- calcination
(m)- mineral
13. An element A with valence electrons 4 combines with another element Bhaving valence elect
What is the nature of bond formed. What will be the molecular formula of the compound
the electron dot structure and give any nivo properties of the compound formed
ना
क
तो
a
.
तो​

Answer 1

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