SSLC (English Medium) कक्षा १० - Tamil Nadu Board of Secondary Education Question Bank Solutions

Match: III

Use the analogy to fill in the blank

Spontaneous process: Natural Radioactivity, Induced process: _______.

A cobalt specimen emits induced radiation of 75.6 millicurie per second. Convert this disintegration in to becquerel (one curie = 3.7 × 10¹⁰ Bq)

Mark the correct choice as

1. Assertion: In a β - decay, the neutron number decreases by one.
2. Reason: In β - decay atomic number increases by one.

Who discovered natural radioactivity?

If A is a radioactive element which emits an α - particle and produces ₁₀₄Rf ²⁵⁹. Write the atomic number and mass number of the element A

Give the SI unit of radioactivity.

Which material protects us from radiation?

Mr. Ramu is working as an X-ray technician in a hospital. But, he does not wear the lead aprons. What suggestion will you give to Mr. Ramu?

Cell phone towers should be placed far away from the residential area – why?

The forelimbs of bat and human are examples of ______ organs.

The homologous organs look similar and perform similar functions but they have different origin and developmental pattern.

Higher Order Thinking Skill (HOT) 

Arun was playing in the garden. Suddenly he saw a dragon fly sitting on a plant. He observed the wings of it. He thought it looked similar to a wing of a crow. Is he correct? Give reason for your answer.

Higher Order Thinking Skill (HOT)

Octopus, cockroach and frog all have eyes. Can we group these animals together to establish a common evolutionary origin. Justify your answer.

Raphano brassica is a man-made tetraploid produced by colchicine treatment.

Match the following

An inexhaustible resources is 

Common energy source in village is ______.

All files are stored in the ______.

The basis of modern periodic law is ______.