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🏝🔺🏝*IMPORTANT CHEMISTRY QUESTIONS*🏝🔺🏝 ☂️☂️912. Solder is an alloy of _ . – Tin and Lead ☂️☂️913. Alum is used as – A purifier for water ☂️☂️914. Nuclear fuel in the sun is __ . – Helium ☂️☂️915. Dead organisms are transformed into petroleum and natural gas __ . – Absence of air ☂️☂️916. Organic Compounds are only soluble in _ . – Non-polar solvents. ☂️☂️917. Which acid is used in soft drinks? – Carbonic acid (H2CO3) ☂️☂️918. Which acid is present in Bee Sting? – Methanoic Acid ☂️☂️919. Tooth enamel is made up of __ . – Calcium Phosphate ☂️☂️920. The name ‘catalyst’ was given by _ . – Berzilius ☂️☂️921. A polymeric substance used to make parachute is _ . – Viscose ☂️☂️922. What is used to avoid melting of ice? – Gelatine ☂️☂️923. Carbon occur in the nature in the purest form as? – Diamond ☂️☂️924. Oxidation is defined as —– – Loss of electrons ☂️☂️925. In nuclear reactor, chain reaction is controlled by using _ . – Cadmium rod ☂️☂️926. The radioactive element most commonly detected in humans is _ . – Potassium – 40 ☂️☂️927. Hydrogen bomb is based on the principle of _ . – Nuclear fusion ☂️☂️928. The ultrapure metal is obtained by _ . – Zone refining ☂️☂️929. Most abundant metal in earth’s crust is __ . – Aluminium ☂️☂️930. Balloons are filled with _ . – Helium ☂️☂️931. The element common to all acids is _ . – Hydrogen ☂️☂️932. What does an alpha particle contain – 2 positive charge a mass unit ☂️☂️933. In effusion, gas escape through – small hole ☂️☂️934. Rusting is – Redox reaction ☂️☂️935. What are the electron present in outermost shell called – Valence electrons ☂️☂️936. What is the chemical formula of caustic potash – KOH ☂️☂️937. Which element has the lowest melting point – Oxygen ☂️☂️938. What is the chemical name of quick lime – Calcium oxide ☂️☂️939. A sudden fall of mercury in a barometer indicates – Stormy weather ☂️☂️940. The term ‘radio activity’ was first used by – Marie Curie ☂️☂️941. PH value of alkaline solution is - >7 ☂️☂️942. The pH scale had been given by – Sornsen ☂️☂️943. Sulphuric acid is – Diabasic ☂️☂️944. The ph value of milk is – 6.6 ☂️☂️945. Hydrochloric acid is also known as – Muriatic acid ☂️☂️946. The purest form of water in nature is – Rain water ☂️☂️947. Tube light is filled with? – Mercury Vapour & Argon ☂️☂️948. Other name of “FOOL’S GOLD” is? – Iron Pyrite ☂️☂️949. Non-stick coating in utensils is of? – TEFLON #important #REVISION ✍️✍️CREDIT:-Krushna⭐️⭐️ 🏝🏝 Join Now 👉@Daily_Science_Computer_Notes

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