Objective Questions on Science

Q121. Cotton dust from textile mills causes a disease known as
(a) Silicosis
(b) Fluorosis
(c) Cancer
(d) Byssinosis

Q122. Cystitis is the infection of which of the following
(a) Liver
(b) Lung
(c) Pancreas
(d) Urinary bladder

Q123. Which of the following types of waves are used in a night vision equipment
(a) Radio wave
(b) Micro wave
(c) Infrared wave
(d) None of the above

Q124. Containers for carrying strong Acids are made of
(a) Lead
(b) Platinum
(c) Brass
(d) Copper

Q125. The pH value of water used for a boiler should be nearly
(a) 7.0
(b) 8.5
(c) 10.7
(d) 11.2

Q126. The correct pair is
(a) Vitamin B1-Retinol
(b) Vitamin B2-Riboflavin
(c) Vitamin B6-Niacin
(d) Vitamin C-Calcifero

Q127. Leakagaes in household LPG can be detected beacuse of the strong smell of _______ mixed with LPG
(a) Formaldehyde
(b) Methyl Bromide
(c) Ethyl Mercaptan
(d) Ammonia

Q128. Acid rain contains
(a) Sulphuric acid and Nitric acid
(b) Carbon di oxide and Carbon mono oxide
(c) Methane and Suphuric acid
(d) Nitric acid and Hydrochloric acid

Q129. The amount of ground displacement in a earthquake is called
(a) Dip
(b) Slip
(c) Focus
(d) Thrust

Q130. In fireworks, the green flame is produced bacuse of _______
(a) Potassium
(b) Phosphorus
(c) Barium
(d) Bromine

Q131. Which of the following metals is mixed with iron to produce stainless steel
(a) Titanium
(b) Zinc
(c) Chromium
(d) Tin

Q132. Which metal is used for coating of Galvanization
(a) Copper
(b) Zinc
(c) Iron
(d) Tin

Q133. Iron is obtained mostly from
(a) Siderites
(b) Iron pyrites
(c) Magnetite
(d) Haematite

Q134. The substance coated on plastic tape-recorder tapes is
(a) Iron oxide
(b) Zinc oxide
(c) Magnesium oxide
(d) Iron sulphate

Q135. The Kelvin scale of temperature for boiling point of water is
(a) 100 K
(b) 270.5 K
(c) 373.2 K
(d) 456.2 K

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