SSLC (English Medium) Class 10 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

The pH of a solution is 3. Its [OH^–] concentration is ______

The pH of a fruit juice is 5.6. If you add slaked lime to this juice, its pH ______

The normal pH of human blood is ______

The pH of rainwater containing dissolved gases like SO₃, CO₂, NO₂ will be less than 7.

On dipping a pH paper in a solution, it turns yellow. Then the solution is basic.

How does pH play an important role in everyday life?

Calculate the pH of 1.0 × 10^–4 molar solution of HNO₃.

What is the pH of 1.0 × 10^–5 molar solution of KOH?

The hydroxide ion concentration of a solution is 1 × 10^–11M. What is the pH of the solution?

Explain the mechanism of cleansing action of soap with the help of a labelled diagram.

Which one of the following is an IUCD?

The embryo sac in a typical dicot at the time of fertilization is ______.

Why are family planning methods not adopted by all the people of our country?

______ is used to change the speed of the car.

The ratio of masses of two planets is 2:3 and the ratio of their radii is 4:7 Find the ratio of their accelerations due to gravity.

Mark the correct choice

1. Assertion: LED bulbs are far better than incandescent bulbs.
2. Reason: LED bulbs consume less power than incandescent bulbs.

Why is tungsten metal used in bulbs, but not infuse wires?

What are the advantages of LED TV over the normal TV?

List the merits of the LED bulb.

How can menstrual hygiene be maintained during menstrual days?