SSC (Marathi Semi-English) इयत्ता १० वी - Maharashtra State Board Important Questions for Science and Technology 1

Answer the following questions related to the modern periodic table.

Name the blocks with the groups that they consist of.

Answer the following questions related to the modern periodic table.

Which block elements are known as transition elements?

Answer the following questions related to the modern periodic table.

How are elements placed around the zig-zag line in the p-block of the periodic table?

Define periods of modern periodic table.

Define groups of modern periodic table.

An element has its electron configuration as 2, 8, 1. Now answer the following questions:

1. What is the atomic number of this element?
2. What is the group of this element?
3. To which period does this element belong?

Select the appropriate options and complete the following paragraph:

(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).

On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.

Corrosion can be prevented by using ……………. solution.

Reaction of iron nails with copper sulphate solution is an example of
(a) Combination reaction
(b) Decomposition reaction
(c) Displacement reaction
(d) Double displacement reaction

Complete the following reaction, balance it and write the name of the products CuO + HCI →_________ + _________

CuSO_4(aq) + Zn_(s) → ZnSO_4(aq) + Cu_(s) is an example of a decomposition reaction.

The reddish brown deposit formed on iron nails kept in a solution of copper sulphate is

1. Cu₂O
2. Cu
3. CuO
4. CuS

Methyl orange is used as an indicator. It shows colour change in acid, base and neutral substance. Tabulate your result as follows:

The chemical formula for rust is.............. .

When the substance ‘A’ is added to a solution of BaSO₄, a yellow precipitate is formed.

1. What do you think substance A is likely to be?
2. Name the precipitate.
3. Which type of reaction is this?

Taking into consideration the relationship in the first pair, complete the second pair

2H₂ + O₂ → 2H₂O :Combination Reaction :: 2HgO → 2Hg + O₂:_________

Find the odd man out:

Turmeric, Methyl Orange, Rose petals, Beetroot.

Rewrite the following statements by selecting the correct options:
\[\ce{CaCO3 ->[\Delta] CaO + CO2 ^}\] is a __________ reaction.

What is meant by rust?

Write the chemical formula of rust.