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Question:- Scientific name for baking soda?
Answer:- Sodium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula NaHCO3. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder. Since it has long been known and is widely used, the salt has many related names such as baking soda, bread soda, cooking soda, and bicarbonate of soda.
Question:- Quartz crystals normally used in quartz clocks etc. is chemically A. silicon dioxide B. germanium oxide C. a mixture of germanium oxide and silicon dioxide D. sodium silicate
Answer:- Option A
Question:- Which of the gas is not known as green house gas? A. Methane B. Nitrous oxide C. Carbon dioxide D. Hydrogen
Answer:- Option D
Question:- Bromine is a A. black solid B. red liquid C. colourless gas D. highly inflammable gas
Answer:- Option B
Question:- The hardest substance available on earth is A. Gold B. Iron C. Diamond D. Platinum
Answer:- Option C
Question:- The variety of coal in which the deposit contains recognisable traces of the original plant material is A. bitumen B. anthracite C. lignite D. peat
Answer:- Option D
Question:- Tetraethyl lead is used as A. pain killer B. fire extinguisher C. mosquito repellent D. petrol additive
Answer:- Option D
Question:- The variety of coal in which the deposit contains recognisable traces of the original plant material is A. bitumen B. anthracite C. lignite D. peat
Answer:- Option D
Question:- Which of the following is used as a lubricant? A. Graphite B. Silica C. Iron Oxide D. Diamond
Answer:- Option A
Question:- The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is A. Argon B. Xenon C. Helium D. Krypton
Answer:- Option C
Question:- The gases used in different types of welding would include A. oxygen and hydrogen B. oxygen, hydrogen, acetylene and nitrogen C. oxygen, acetylene and argon D. oxygen and acetylene
Answer:- Option D
Question:- The property of a substance to absorb moisture from the air on exposure is called A. osmosis B. deliquescence C. efflorescence D. desiccation
Answer:- Option B
Question:- in which of the following activities silicon carbide is used? A. Making cement and glass B. Disinfecting water of ponds C. cutting very hard substances D. Making casts for statues
Answer:- Option C
Question:- The average salinity of sea water is A. 3% B. 3.5% C. 2.5% D. 2%
Answer:- Option B