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Who among the following evolved the concept of relationship between mass and energy?

1. A Dalton
2. B Einstein
3. C Planck
4. D Rutherford

The universal blood group donor is--

1. A A-
2. B AB+
3. C B-
4. D O+

Which one of the following metals reacts very rapidly with water at room temperature?

1. A beryllium
2. B calcium
3. C magnesium
4. D potassium

The atom is made of---

1. A Neutrons, Gamma Rays and Positrons
2. B Positrons, Neutrons and Electrons
3. C Protons and Quarks
4. D Protons, Neutrons and Electrons

টলেমি কি ছিলেন?

1. A চিকিৎসক
2. B জ্যোতির্বিদ
3. C দার্শনিক
4. D সেনাপতি

Heating element of an electric heater is made up of--

1. A Chromium
2. B Graphite
3. C Nichrome
4. D Tungsten

ই-মেইল কি?

1. A ইজি-মেইল
2. B ইমার্জেন্সী-মেইল
3. C ইলেক্ট্রনিক-মেইল
4. D এক্সপ্রেস-মেইল

Which one of the following substances undergoes chemical change on heating?

1. A lead nitrate
2. B platinum wire
3. C silica
4. D sodium chloride

Which of the following compound is used in the manufacturing of baking powder?

1. A calcium oxide
2. B silicon carbide
3. C sodium bicarbonate
4. D sodium carbonate

Which is not a renewable resource of energy?

1. A petroleum
2. B sun
3. C water
4. D wind

The tendency of a liquid drop to assume spherical shape is due to--

1. A density
2. B surface tension
3. C vapour pressure
4. D viscosity

Which one of the following nitrogenous fertilizers is not very effective in acidic soils?

1. A ammonium sulphate
2. B calcium nitrate
3. C nitrolin
4. D urea