SSC (English Medium) 10th Standard - Maharashtra State Board Question Bank Solutions

While going from top to bottom in a group the atomic radius _______.

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

In Myopia the human eye _______.

Due to elongation of _______ and increase in curvature of the eye lens, a person cannot see distant objects clearly.

Nearsightedness: elongated eyeball : : farsightedness: _______

Nearsightedness : concave lens : : farsightedness : _______

Write chemical formula for rust.

Nanometer unit is used to measure atomic radius.

Moving from left to right, the size of the atom decreases.

The size of an atom depends on the number of valence electrons.

Write an Explanation.

Atomic radius

Write scientific reason.

In same period, boron and oxygen elements have different atomic size.

Write scientific reason.

Nearsightedness, this defect can be corrected by using spectacles with concave lens.

Write scientific reason.

Space debris can be harmful to artificial satellites.

Some elements and their atomic radii are given here. Arrange them in decreasing order of their atomic radii. Identify which of the above elements is the biggest atom and which is smallest?

Explain the following reaction with their balanced chemical equation.

Hydrogen sulphide reacts with sulphur dioxide.

Write information about the given atomic numbers in the table. 10, 20, 7.

Observe the given below the figure, correct it and explain and write about the concept depicted in this figure.

Given below is a diagram showing a defect of vision. Name the defect of vision and draw an accurately labelled diagram to correct this defect.

Balance the given chemical reaction as per the instructions below.

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]

Oxidation means losing electrons then what is reduction?