SSC (Marathi Semi-English) १० वीं कक्षा - Maharashtra State Board Important Questions

The reaction of iron nail with copper sulphate solution is ______ reaction.

Study the following chemical reaction and answer the questions given below:

\[\ce{AgNO3_{(aq)} + NaCl_{(aq)} -> \underset{(Precipitate)}{AgCl_{(s)}}↓ + NaNO3_{(aq)}}\]

1. Identify and write the type of chemical reaction.
2. Write the definition of the above type of chemical reaction.
3. Write the names of the reactants and products of the above reaction.

Answer the following question:

Grills of doors and windows are always painted before they are used? Give reason.

 Answer the following:

What is corrosion? Do gold ornaments corrode? Justify.  

If sodium chloride is added to the silver nitrate solution:

a. which precipitate is formed?
b. name the type of reaction.
c. write the chemical equation.

Explain the reaction given in the figure.

Identify the type of chemical reaction given below:

\[\ce{CuSO4 + Fe -> FeSO4 + Cu}\]

Identify the type of chemical reaction given below:

\[\ce{2Mg + O2 -> 2MgO}\]

In a double displacement reaction ______.

Complete the following chemical reaction:

\[\ce{CuSO4 (aq) + Pb (s) -> \underline{}\underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}\underline{}}\]

Name the chemical reaction type.

Complete the given chemical equation:

\[\ce{Zn(s) + CuSO4(aq) -> \underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}}\]

Name the type of reaction.

It is recommended to use air tight containers for storing oil for a long time.

Complete the following reaction:

\[\ce{C_12H_22O11->[Heat]}\] ______ + ______.

Write the molecular formula of calcium carbonate.

Dilute NaOH can be tested with
(a) red litmus paper
(b) blue litmus paper
(c) lime water
(d) Na2CO3

Give the molecular formula of bleaching powder.

When phenolphthalein is added to NaOH, the colour of the solution will become _________.

1. colourless
2. red
3. pink
4. yellow