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 best malleable metal is – (A) Aluminum (B) Silver (C) Gold (D) Lead Answer: (C) Gold 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 mixtures containing a solid and a liquid can be separated … Read more
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? (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
The magnet is strongest near the – (A) Poles of the magnet (B) Ends of the magnet (C) Centre of the magnet (D) On equator point from the poles of the magnet Answer: (B) Ends of the magnet More Question Question: Which of the following metals in pure form has the highest melting point? (A) … Read more
The numerical ratio of displacement to distance for a moving object is – (A) Always Less than 1 (B) Equal to 1 or more than 1 (C) Always more than 1 (D) Equal to 1 or less than 1 Answer: (D) Equal to 1 or less than 1 More Question Question: Which of the following … 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 – (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
The value of G in the formula for gravitational force depends on – (A) Mass of the earth only (B) The radius of the earth only (C) Both mass and radius of the earth (D) Neither mass nor the radius of the earth Answer: (D) Neither mass nor the radius of the earth More Question … Read more
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
Which of the following is/ are physical changes? I. Melting of iron rod II. Rusting of iron metal III. Bending of an iron rod IV. Drawing a wire of iron metal Correct code is – (A) Only I, II and III (B) Only I, II and IV (C) Only I, III and IV (D) Only … Read more