Which among the following is responsible for depletion of Ozone? [A] Carbon monoxide [B] Carbon dioxide [C] Chlorofluoro carbon [D] Mercuric oxide
Adv.
Chlorofluoro carbon
Which among the following is popularly called Hypo? [A] Silver Bromide [B] Silver nitrate [C] Sodium thiosulphate [D] Sodium phosphate
Which among the following scientists had discovered Radium? [A] Marie and Pierre Curie [B] Andre-Louis Debierne [C] Kasimir Fajans [D] Oswald Helmuth Gohring
Which among the following is the objective of the Methyl tert-butyl ether (MTBE) mixing with Petroleum? [A] Raise Octane Number [B] Antioxidant Stabilizer [C] Lead Scavanger [D] Fuel Dye
Which among the following are constituents of Brass? [A] Zinc and Copper [B] Iron and Zinc [C] Copper and Nickel [D] Iron and Copper
2,4-D, which is sold as a weed killer of the broad-leaved weeds is a synthetic version of __: [A] Auxin Hormone [B] Cytokinin Hormone [C] Xylitol [D] None of them
Which among the following is known as Quick Lime? [A] CaO [B] CaCO2 [C] Ca(OH)2 [D] CaCl2
Kazimierz Funk or Casimir Funk, was a Polish biochemist, generally credited with the first formulation of the concept of which of the following ? [A] Amino Acids [B] DNA [C] RNA [D] Vitamins
Consider the following: 1. Sodium 2. Potassium Which among the above plays vital role in restoring the body fluid? [A] 1 only [B] 2 only [C] Both 1& 2 [D] Neither 1 nor 2
Why most of the aromatic hydrocarbons burn with a sooty flame? [A] Because the carbon-hydrogen ratio in aromatic compounds is high [B] Because of the presence of the strong carbon-carbon bonds [C] Because, hydrocarbons are unsaturated [D] Because the carbon-hydrogen ratio in aromatic compounds is low
What is the reason that despite being third most abundant element on the Earth’s surface and most abundant chemical substance in the universe, Hydrogen is not found as a gas in Earth’s atmosphere? [A] It is very reactive and unstable gas [B] It is so light that readily escapes earth’s gravity [C] It is not found in free state in nature [D] None of the above reasons
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