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

Draw a neat labelled diagram.

Froth floatation method.

Draw a neat labelled diagram.

Electrolytic reduction of alumina.

Draw a neat labelled diagram.

Hydraulic separation method.

Atomic number of metal ‚A‛ is 11, while atomic number of metal ‚B‛ is 20. Which of them will be more reactive? Write the chemical reaction of dilute HCl  with metal ‚A‛.

Name the defect shown in the diagram.

Which of the following process to be carried out to avoid the
formation of greenish layer on brass vessels due to corrosion?

Surabhi from std. X uses spectacle. The power of the lenses in her spectacle is 0.5 D.

Answer the following questions from the given information:

1. Identify the type of lenses used in her spectacle.
2. Identify the defect of vision Surabhi is suffering from.
3. Find the focal length of the lenses used in her spectacle.

Taking into consideration the period of the elements given below, answer the following questions: 

1. Arrange the above elements in decreasing order of their atomic radii.
2. State the period to which the above elements belong.
3. Why this arrangement of elements is similar to the above period of modern periodic table?
4. Which of the above elements have the biggest and the smallest atom?
5. What is the periodic trend observed in the variation of atomic radius while going from left to right within a period?

(a) Fill in the blanks and rewrite the completed statements: 

(i) ________ group in the periodic table contains elements that are all gases at room temperature. 

(ii) Very fine particles mainly scatter ______ light.

Fill in the blank and rewrite the completed statement:

________ group in the periodic table contains elements that are all gases at room temperature.

Answer the following question:
State the four blocks of the modern periodic table based on the electronic configuration of elements.

When the positive charge on an ion increases or the negative charge on them decreases it is called as _______.

_______ is used for electrical measurements.

In hypermetropia human eye _______.

Ionic compounds are electrically _______.

Focal length : metre : : power of lens : _______

: Concave lens : : : ______

Find the odd one out and give its explanation.