abhinaysingh525 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
Question: Milk of Magnesia is a – (A) Colloid (B) True solution (C) Homogeneous Mixture (D) Suspension Answer: (D) Suspension Explanation: The milk of Magnesia is a suspension of magnesium hydroxide in water. The solid particles and water remain separate in a suspension. More Question Question: The best malleable metal is – (A) Aluminum (B) … Read more
The physics phenomenon when, in polar regions like Alaska and Northern Canada, a splendid display of colours is seen in the sky is called a/an – (A) aurora borealis (B) star shower (C) active galactic nucleus (D) star’s intrinsic luminosity Answer: (A) aurora borealis More Question Question: The best malleable metal is – (A) Aluminum … Read more
Which of the following metals in pure form has the highest melting point? (A) Tungsten (B) Copper (C) Platinum (D) Gold Answer: (A) Tungsten More Question Question: The best malleable metal is – (A) Aluminum (B) Silver (C) Gold (D) Lead Answer Question: The early attempt to classify elements as metals and non-metals was made … Read more
Which mineral is also known as fool’s gold? (A) Quartz (B) Magneti (C) Pyrite (D) Fluorite Answer: (C) Pyrite More Question Question: The best malleable metal is – (A) Aluminum (B) Silver (C) Gold (D) Lead Answer Question: The early attempt to classify elements as metals and non-metals was made by – (A) Mendeleev (B) … Read more
Sound cannot travel through – (A) Solids (B) Liquids (C) Gases (D) Vaccum Answer: (D) Vaccum Explanation: Sound waves are called mechanical waves because they need a material medium like solid, liquid or gas for their propagation. More Question Question: The best malleable metal is – (A) Aluminum (B) Silver (C) Gold (D) Lead Answer … Read more
Which of the following is not a characteristic of a physical change? (A) It is a temporary change (B) It is usually an irreversible change (C) Very little heat (or light) energy is usually absorbed or given out (D) The mass of a substance does not alter in a physical change Answer: (B) It is … Read more
All the mixtures containing a solid and a liquid can be separated by – I. Centrifugation II. Evaporation III. Crystallisation IV. Chromatography Correct code is – (A) Only I (B) Only II and III (C) I, II, III and IV (D) Only III and IV Answer: (C) I, II, III and IV More Question Question: … Read more
Which of the following metals exists in the liquid state? (A) Sodium (B) Mercury (C) Silver (D) Chromium Answer: (B) Mercury More Question Question: The best malleable metal is – (A) Aluminum (B) Silver (C) Gold (D) Lead Answer Question: The early attempt to classify elements as metals and non-metals was made by – (A) … Read more
What is the correct ascending order of the following substances in relation to their density (kg/ m(C)? (A) Aluminium, Iron, Mercury, Gold (B) Gold, Iron, Aluminium, Mercury (C) Mercury, Iron, Gold, Aluminium (D) Iron, Gold, Mercury, Aluminium Answer: (A) Aluminium, Iron, Mercury, Gold More Question Question: The best malleable metal is – (A) Aluminum (B) … Read more