DEB STUDY - The Competitive Exam Guide

  Chemistry Q&A For All Competitive Exam ✱ ✱ Q 1.  Lead pencil contains _____ .  ⇒  Graphite ✱ ✱ Q 2.  Ozone is _______ .  ⇒  Diamagnetic ✱ ✱ Q 3.  The important metal used with iron to produce stainless steel is _____ .  ⇒  Chromium ✱ ✱ Q 4.  Which gas is responsible for the swelling of bread?  ⇒  Carbon dioxide

  Chemistry Q&A For All Competitive Exam ✱ ✱ Q 1.  Purest form of Iron is?  ⇒ Wrought Iron ✱ ✱ Q 2.  Radium is extracted from ______ .  ⇒ Pitchblende ✱ ✱ Q 3.  Which agent is as ‘seed’ in artificial rain?  ⇒ Silver Iodide ✱ ✱ Q 4.  Oxides of metals are ______ .  ⇒ Alkaline

  Chemistry Q&A For All Competitive Exam ✱ ✱ Q 1.  Compounds responsible for temporary hardness of water?  ⇒ Bicarbonates of Calcium and Magnesium ✱ ✱ Q 2.  Compounds responsible for permanent hardness of water?  ⇒ Sulphates and Chlorides of Calcium and Magnesium ✱ ✱ Q 3.  Gases used for ripening raw fruits?  ⇒ Ethylene & Acetylene ✱ ✱ Q 4.  Substance used in Cancer treatment?  ⇒ Cobalt –  60

Chemistry Q&A For All Competitive Exam   ✱ ✱ Q 1.  Carbon occur in the nature in the purest form as?  ⇒ Diamond ✱ ✱ Q 2.  Oxidation is defined as -----  ⇒ Loss of electrons ✱ ✱ Q 3.  In nuclear reactor, chain reaction is controlled by using _____ .  ⇒ Cadmium rod ✱ ✱ Q 4.  The radioactive element most commonly detected in humans is _____ .  ⇒ Potassium – 40

Chemistry Q&A For All Competitive Exam   ✱ ✱ Q 1.  The most abundant element in the earth's crust is ?  ⇒ Oxygen ✱ ✱ Q 2.  The lustre of a metal is due to _______ .  ⇒ Presence of free electrons ✱ ✱ Q 3.  Which gas is used in fire extinguisher?  ⇒ Carbon dioxide ✱ ✱ Q 4.  Which gas is used in cigarette lighters?  ⇒ Butane

Chemistry Q&A For All Competitive Exam   ✱ ✱ Q 1.  ______ (metal) is liquid at room temperature.  ⇒ Gallium ✱ ✱ Q 2.  ______ is used to prepare fire proof and water proof clothes.  ⇒ Calcium hydride ✱ ✱ Q 3.  Galvanised iron is coated with?  ⇒ Zinc ✱ ✱ Q 4.  Chemical name of Chromic Acid is?  ⇒ Chromium trioxide

  Chemistry Q&A For All Competitive Exam ✱ ✱ Q1.  Main ore of Mercury is?  ⇒ Cinnabar ✱ ✱ Q2.  Egg shell is made up of?  ⇒ Calcium Carbonate ✱ ✱ Q3.  Common preservative in food processing industry is?  ⇒ Benzoic Acid ✱ ✱ Q4.  First organic compound synthesized in laboratory & by whom?  ⇒ Urea by Friedrich Wöhler

Chemistry Q&A For All Competitive Exam ✱ ✱ Q1. Tube light is filled with?  ⇒  Mercury Vapour & Argon ✱ ✱ Q 2.  Other name of “FOOL’S GOLD” is?  ⇒  Iron Pyrite ✱ ✱ Q 3.  Non-stick coating in utensils is of?  ⇒  TEFLON ✱ ✱ Q4 .  ______ is known as Artificial Silk.  ⇒  Reyon

Chemistry Q&A For All Competitive Exam ✱ ✱ Q1. Most abundant metal in earth’s crust is ______ .  ⇒  Aluminium ✱ ✱ Q2.  Balloons are filled with _____ .  ⇒  Helium ✱ ✱ Q3.  The element common to all acids is _____ .  ⇒  Hydrogen ✱ ✱ Q4.  Which gas is used in filling electric bulbs ______ ?  ⇒  Argon

Chemistry Q&A For All Competitive Exam ✱ ✱ Q1.  Platinum is also called _____ .  ⇒  White Gold ✱ ✱ Q2. Which material is used in making of safety matches?  ⇒  Red Phosphorous ✱ ✱ Q3.  Nail polish remover contains?  ⇒  Acetone ✱ ✱ Q4.  Paper is chemically _______ .  ⇒  Cellulose

Chemistry Q&A For All Competitive Exam ✱ ✱ Q.1 Adsorption of Hydrogen, by a metal is known as Occlusion.  ✱ ✱ Q.2 Seaweeds are important source of  Iodine. 

Chemistry Q&A For All Competitive Exam ✱ ✱ Q.1 The acid used for removing the stains of rust is  Oxalic acid.  ✱ ✱ Q.2 The most active form of carbon is  Charcoal. 

Chemistry Q&A For All Competitive Exam 📗Q.1 Nessler's reagent is used for the detection of -  Ammonium ions or Ammonia  📗 Q.2 A Dewar's flask is used to store  Liquid Air.   

 Chemistry Q&A For All Competitive Exam ✔️Q.1 Water for civil supplies is purified by  Chlorination.  ✔️Q.2 Dry ice is  Solid Carbon-dioxide. 

 Chemistry Q&A For All Competitive Exam ✔️Q.1 Slag is formed when metallurgical impurities combines with-  Flux.  ✔️Q.2 Gun powder is a mixture of  Sulphur + Charcoal + Nitre 

 Chemistry Q&A For All Competitive Exam Q.1 The Characteristic property of an element that depends on its valency is :: Equivalent Weight Q.2 Atoms or groups of atoms that are charged are known as :: Ions.

 Chemistry Q&A For All Competitive Exam 1. The strongest oxidising agent is -  Fluorine 2. Chlorine bleaches an article by -  Oxidation

 Chemistry Q&A For All Competitive Exam 1. The Macro-elements present in fertilizer are -  Nitrogen(N), Phosphorus(P), Potassium(K) 2. An excellent organic fertilizer and soil conditioner is -  Vermicompost