Basic Information of Daily Science Inventions and

151. The Sun is a--

  • ক. Asteriod
  • খ. Planet
  • গ. Star
  • ঘ. None of the above

উত্তরঃ Star

বিস্তারিত

152. What type of iron is obtained from blast furnace?

  • ক. wrought iron
  • খ. soft iron
  • গ. pig iron
  • ঘ. cast iron

উত্তরঃ cast iron

বিস্তারিত

153. Which of the following can be used both as an oxidizing agent and as a reducing agent?

  • ক. sodium nitrite
  • খ. sodium sulphide
  • গ. sodium thiosulphate
  • ঘ. sodium nitrate

উত্তরঃ sodium nitrate

বিস্তারিত

154. Which one of the following metals reacts very rapidly with water at room temperature?

  • ক. magnesium
  • খ. calcium
  • গ. beryllium
  • ঘ. potassium

উত্তরঃ calcium

বিস্তারিত

155. Which one of the following metals does not react even with boiliing water?

  • ক. magnesium
  • খ. calcium
  • গ. beryllium
  • ঘ. potassium

উত্তরঃ beryllium

বিস্তারিত

156. In tritinum, electrons, protons and neutrons are present in the ratio of--

  • ক. 1 : 1 : 2
  • খ. 1 : 2 : 1
  • গ. 1 : 1 : 0
  • ঘ. 1 : 1 : 1

উত্তরঃ 1 : 1 : 2

বিস্তারিত

157. What is known as the universal solvent?

  • ক. Hydrochloric Acid
  • খ. Aqua Regia
  • গ. Water
  • ঘ. Sulphuric Acid

উত্তরঃ Water

বিস্তারিত

158. Stainless steel is an alloy of iron and--

  • ক. nickel, manganese and chromium
  • খ. nickel, cobalt and manganese
  • গ. nickel and chromium
  • ঘ. chromium and tungsten

উত্তরঃ nickel, manganese and chromium

বিস্তারিত

159. What are elements containing the same number of protons but different number of neutrons called?

  • ক. compounds
  • খ. allotropes
  • গ. isotopes
  • ঘ. isobars

উত্তরঃ isotopes

বিস্তারিত

160. Which of the following is the only liquid metal?

  • ক. Mercury
  • খ. Water
  • গ. Hydrogen
  • ঘ. Chlorine

উত্তরঃ Mercury

বিস্তারিত

161. Which of the following acids is most important in building tissue proteins?

  • ক. lactic
  • খ. saturated fatty
  • গ. linoleic
  • ঘ. amino

উত্তরঃ amino

বিস্তারিত

162. Nameplates made of brass get discolured in air because of the presence of which of the following gases in the air?

  • ক. Carbon Di-oxide
  • খ. Hydrogen sulphide
  • গ. Oxygen
  • ঘ. Nitrogen

উত্তরঃ Hydrogen sulphide

বিস্তারিত

163. Which one of the following nitrogenous fertilizers is not very effective in acidic soils?

  • ক. nitrolin
  • খ. calcium nitrate
  • গ. ammonium sulphate
  • ঘ. urea

উত্তরঃ urea

বিস্তারিত

164. What is the correct increasing order of abundance of the main components of air?

  • ক. nitrogen, oxygen and argon
  • খ. nitrogen, argon and oxygen
  • গ. oxygen, nitrogen and argon
  • ঘ. argon, nitrogen and oxygen

উত্তরঃ argon, nitrogen and oxygen

বিস্তারিত

165. Dimond and graphite are similar in---

  • ক. electric conductivity
  • খ. atomic weight
  • গ. crystal structure
  • ঘ. density

উত্তরঃ atomic weight

বিস্তারিত

166. Which of the following is the most toxic gas?

  • ক. nitrogen
  • খ. hydrogen
  • গ. carbon dioxide
  • ঘ. carbon monoxide

উত্তরঃ carbon monoxide

বিস্তারিত

167. Which one of the following contributes largely to the green-house gas effect?

  • ক. water vapour
  • খ. ozone
  • গ. carbon dioxide
  • ঘ. carbon monoxide

উত্তরঃ carbon dioxide

বিস্তারিত

168. Which one of the following is an air-pollutant present in the atmosphere?

  • ক. nitrogen
  • খ. hydrogen
  • গ. oxygen
  • ঘ. carbon monoxide

উত্তরঃ carbon monoxide

বিস্তারিত

169. Which one of the following crops requires continuous semi-aquatic condition for cultivation?

  • ক. sugarcane
  • খ. ground nut
  • গ. wheat
  • ঘ. rice

উত্তরঃ rice

বিস্তারিত

170. Which one of the following is responsible for the depletion of ozone layer?

  • ক. PAN
  • খ. sulphur oxide
  • গ. chloroflurocarbons
  • ঘ. methane

উত্তরঃ chloroflurocarbons

বিস্তারিত

171. Which one of the following serves as host tree for silkworm to produce good silk?

  • ক. hibiscus
  • খ. chrysanthemum
  • গ. banyan tree
  • ঘ. mulberry

উত্তরঃ mulberry

বিস্তারিত

172. Which of the following was the world's worst industrial disaster?

  • ক. Minamata Syndrome
  • খ. The Tree Mile Island mishap
  • গ. Chernobyl nuclear accident
  • ঘ. Bhopal gas tragedy

সঠিক উত্তরের জয় বিস্তারিত দেখুন

173. The Chernobyl nuclear accident took place in--

  • ক. 1984
  • খ. 1990
  • গ. 1986
  • ঘ. 1979

উত্তরঃ 1986

বিস্তারিত

174. The increase in carbon dioxide in the atmosphere cause---

  • ক. no change in earth temperature
  • খ. increase in ultraviolet rays
  • গ. rise in earth temperature
  • ঘ. fall in earth temperature

উত্তরঃ rise in earth temperature

বিস্তারিত

175. Which of the following soils is very hard to cultivate?

  • ক. black
  • খ. sandy
  • গ. red
  • ঘ. alluvial

উত্তরঃ red

বিস্তারিত

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