The early attempt to classify elements as metals and non-metals was made by –

The early attempt to classify elements as metals and non-metals was made by – (A) Mendeleev (B) Lother Meyer (C) Lavoisier (D) Henry Moseley Answer: (C) Lavoisier More Question Question: Which of the following metals in pure form has the highest melting point? (A) Tungsten (B) Copper (C) Platinum (D) Gold Answer Question: All the … Read more

The lowest temperature at which an oil gives sufficient vapours to form an explosive mixture with air is known as –

The lowest temperature at which an oil gives sufficient vapours to form an explosive mixture with air is known as – (A) Flash Point (B) Smoke Point (C) Explosive Point (D) Acidic Flux Answer: (A) Flash Point Explanation: The flashpoint of a liquid is the lowest temperature at which the liquid gives off enough vapour … Read more

Which is the device used to detect and measure small electric currents in a circuit?

Which is the device used to detect and measure small electric currents in a circuit? (A) Transformer (B) Galvanometer (C) Thermometer (D) Electromagnetic Induction Answer: (B) Galvanometer More Question Question: Which of the following metals in pure form has the highest melting point? (A) Tungsten (B) Copper (C) Platinum (D) Gold Answer Question: All the … Read more

When a hanging carpet is beaten with a stick, the dust particles in it start coming out of it. This phenomenon can be explained by making use of –

When a hanging carpet is beaten with a stick, the dust particles in it start coming out of it. This phenomenon can be explained by making use of – (A) Newton’s first law of motion (B) Newton’s second law of motion (C) Newton’s third law of motion (D) Newton’s law of gravitation Answer: (A) Newton’s … Read more

Who was the first scientist of the world to use symbols to represent elements in a shortway?

Who was the first scientist of the world to use symbols to represent elements in a shortway? (A) Dalton (B) Jons Jakob Berzelious (C) Neils Bohr (D) Dmitri Mendeleev Answer: (A) Dalton More Question Question: Which of the following metals in pure form has the highest melting point? (A) Tungsten (B) Copper (C) Platinum (D) … Read more