What is the scientific name for common salt?
(A) sodium sulfate
(B) sodium chloride
(C) sodium bicarbonate
(D) Ammonium chloride
In which of the following industries is mica as a raw material?
(A) Cement
(B) Glass and Pottery
(C) Iron and Steel
(D) Electrical
The best means of extinguishing petrol fires is-
(A) Baking Powder
(B) Carbon dioxide
(C) Sand
(D) Water
Alkaline solution is the value of Ph.
(A) Less than 7
(B) More than 7
(C) Zero
(D) 7
Sericulture is called—
(A) Apiculture
(B) Sericulture
(C) Psiculture
(D) Horticulture
X-rays were discovered by ________.
(A) Faraday
(B) Roington
(C) H. Devi
(D) Lavoisier
The level of sound during normal conversation is
(A) 20 db
(B) 40 db
(C) 60 db
(D) 80 db
The food substances which get oxidised easily can be kept for longer duration by adding
(A) oxygen and keeping them in sun for few days
(B) nitrogen and keeping them in sun for few days
(C) oxygen and keeping them in airtight containers
(D) nitrogen and keeping them in airtight containers
The approximate percentages of oxygen, nitrogen, and carbon dioxide in pure air on the Earth's atmosphere are:
(A) 0.03%, 21% and 78% respectively
(B) 78%, 21% and 0.03% respectively
(C) 21%, 78% and 0.03% respectively
(D) 21%, 7.8% and 0.03% respectively
Blood group was discovered by -
(A) Karl Landsteiner
(B) Pavlov
(C) Alexander Fleming
(D) William Harvey
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