Chemistry-Objective Related Question Answers
901. What is alloyed with copper to make bronze; and with lead to make pewter?
Tin
902. The components of Magnalium are?
Magnesium; Aluminium
903. Which kind of steel is used for making blade?
High carbon steel
904. What are the components of solder?
tin and lead
905. The heating element of an electric heater is made of?
Nichrome
906. Photographic films are coated with?
Silver Bromide
907. Artificial rain is done by using?
Silver iodide
908. Compound which has the smell of rotten fish?
Phosphine
909. Coral reefs are made of?
Calcium carbonate
910. Compound used in tear gas?
Benzyl chloride
911. Compound used as airpurifier in submarines?
Sodium peroxide
912. Which is considered to be an anomalous compound?
Water
913. Which chemical compound may be used as a fuel for driving vehicles?
Ethanol
914. What is common salt?
Sodium chloride
915. Chemical reaction in which heat is evolved?
Exothermic reaction
916. What is caustic soda?
Sodium hydroxide
917. What is Quick lime?
Calcium oxide
918. Which calcium compound is used to remove ice from roads in cold countries?
Calcium chloride
919. Which metal salt gives lilac colour to the flame?
Potassium
920. Which compound of sodium is used to separate soap from glycerine?
Sodium chloride
921. What is the difference between lime and limestone?
Lime is calcium oxide; Limestone is calcium carbonate
922. What is the difference between quick lime and slaked lime?
Quick lime is calcium oxide and slaked lime is calcium hydroxide
923. Soda lime is a mixture of?
Calciumoxide and Sodium hydroxide (Quicklime and caustic soda)
924. What is the main constituent of bones?
Calcium phosphate
925. The scales formed inside the boilers are chemically?
Calcium carbonate
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