Posted On : 03-Jul-2018

Q1: Which one among the following substances evolves heat when dissolved in water

• A. Potassium nitrate
• B. Calcium oxide
• C. Glucose
• D. Sodium chloride

Q2: What is the mixture of potassium nitrate, powdered charcoal and sulphur called

• A. glass
• B. cement
• C. paint
• D. gun powder

Q3: When water itself combines chemically with some element of mineral it is called

• A. Carbonation
• B. Desilication
• C. Hydration
• D. Oxidation

Q4: KMnO4 can be used as a/an

• A. Disinfectant
• B. Insecticide
• C. Fertilizer
• D. Pesticide

Q5: Which one among the following metals is used for making boats because it does not corrode by seawater?

• A. Titanium
• B. Tungsten
• C. Nickel
• D. Antimony

Q6: Dead organs are generally stored in formalin. Formalin is

• A. aqueous ferrous sulphate
• B. aqueous formic acid
• C. aqueous ferric alum
• D. aqueous formaldehyde

Q7: Contact lenses are made from

• A. polyvinyl chloride
• B. Lucite
• C. polystyrene
• D. Teflon

Q8: The metal compound commonly found in Sindoor or kumkum is based on

• A. tin
• B. copper
• C. lead
• D. zinc

Q9: Alum is used as

• A. an analgesic
• B. a water purifier
• C. a fertiliser
• D. a disinfectant

Q10: Vinegar is the trade name of

• A. Acetic acid
• B. Chloroform
• C. carbon tetrachloride
• D. Ethyl alcohol