CIDESCO MCQ (SET 1) QUESTIONS AND ANSWERS 2023

CIDESCO MCQ (SET 1) QUESTIONS AND ANSWERS 2023 Which of the following is an anion a) a negatively charged chloride atom (Cl-) b) a positively charged hydrogen atom (H+) c) a negatively charged electron orbiting around the nucleus of an atom d) a positively charged proton in the nucleus of an atom - a) a negatively charged chloride atom (Cl-) If the PH of a solution is between 1&3 the solution is a strong a)strong acid b)strong alkali c)weak acid d)weak alkali - Strong acid Sublimation is the change of matter from a)a gas to a solid b)a liquid to a solid c)a liquid to a gas d)a solid to a gas - A solid to a gas Which one of the following belongs to the science of chemistry a)the alteration of the structure of molecules b)the condensation of vapour c)the conduction of electricity along a wire d)the production of rays in the environment - The alteration of the structure of molecules An atom is electrically neutral because it has a)more protons than an electrons b)more electrons than protons c)has the same number of protons d)has the same number of protons &electrons - Has the same number of protons &electrons A substance which chemically cannot be broken down in to simpler substances is called a)a compound b)an element c)a mixture d)an emulsion - An element