SSC (Marathi Semi-English) 10th Standard Board Exam [इयत्ता १० वी] - Maharashtra State Board Question Bank Solutions for Science and Technology 1

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
 ₁₉K, ₃Li, ₁₁Na, ₄Be Which of these atoms has smallest atomic radius?

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with an explanation.

₁₃Al, ₁₄Si, ₁₁Na, ₁₂Mg, ₁₆S

Which of the above elements has the highest metallic character?

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.

 ₆C, ₃Li, ₉F, ₇N, ₈O Which of the above elements has the highest nonmetallic character?

Which device is used to produce electricity? Describe with a neat diagram.

Write the scientific reason.

The third period contains only eight elements even though the electron capacity of the third shell is 18

An element has its electron configuration as 2,8,2. Now answer the following questions.
i. What is the atomic number of this element?
ii. What is the valency of this element?
iii. What is the group of this element?
iv. To which period does this element belong?
v. With which of the following elements would this element resemble?

`_7N ,  _4Be  ,  _18Ar  , _17CL`

Choose and write the correct option.

What is the type of the following reaction?

BaCl₂ + ZnSO₄ →  BaSO₄ + ZnCl₂

Which of this element belong to the period 3? Write their electronic configuration

`3^(Li) , 14^(Si) , 2^(He) , 15^(P)`

Study the following principle and answer the question.
A force is excreted on the current carrying conductor. The direction of this force depends on both the direction of the current and the direction of the magnetic field. This force is maximum when the direction of current is perpendicular to the direction of the magnetic field.
a) By which law we can determine the direction of force excreted on the current carrying conductor.
b) In which electrical equipment this principle is used.
c) Draw a diagram representing construction of this equipment.
d) Write the working of this equipment in brief.

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.

An element has its electron configuration as 2, 8, 2. Now answer the following question. 

What is the atomic number of this element?

An element has its electron configuration as 2, 8, 2. Now answer the following question.

What is the group of this element?

An element has its electron configuration as 2, 8, 2. Now answer the following question.

To which period does this element belong?

An element has its electron configuration as 2, 8, 2. Now answer the following question. 

With which of the following elements would this element resemble?
(Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)

An electric iron rated 750 W is operated for 2 hours/day. How much energy is consumed by the electric iron for 30 days?

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.

The astronomical object closest to us is _________ in our galaxy.

_______ is the outermost shell for elements of period 2.

Which pair of atomic numbers represents elements in the same group?

Which among the following elements would lose an electron easily?