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Q126. Which of the following is used for the selection of biological tissues
- Aliquid nitrogen
- Bliquid helium
- Cliquid argon
- DFluid Gromin
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Answer: B) liquid helium
Q127. The explosive compound of nitrogen is_
- ANCI³
- BN² O⁵
- CNH³
- DNP³
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Answer: A) NCI³
Q128. Which of the following fertilizers has the highest percentage of nitrogen?
- AUrea
- Bammonium nitrate
- Cammonium sulphate
- Dcalcium nitrate
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Answer: A) Urea
Q129. Potato chips are made in plastic bags?
- AN²O
- BNO
- CNO²
- DN²O⁵
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Answer: B) NO
Q130. Which one gas is produced during the formation of photochemical smog?
- Ahydrogen
- Bnitrogen oxide
- Cozone
- Dmethane
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Answer: B) nitrogen oxide
Q131. Which one of the following is not a naturally occurring greenhouse gas in the atmosphere?
- Anitrogen oxide
- Bcarbon dioxide
- Cmethane
- Dozone
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Answer: A) nitrogen oxide
Q132. Which of the following reactions occurs due to lightning?
- AHydrogen and oxygen combine to form water, which becomes rain.
- BThe solid form of water changes into vapor state
- CNitrogen oxides are formed by the reaction of nitrogen and oxygen.
- DNitrogen and hydrogen react rapidly to form ammonia
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Answer: C) Nitrogen oxides are formed by the reaction of nitrogen and oxygen.
Q133. Nitrous oxide is the chemical name of which of the following?
- Atear gas
- Bmosquito repellent
- Claughing gas
- Dfire extinguisher
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Answer: C) laughing gas
Q134. Laughing gas is ____
- Anitric oxide
- BNitrous Oxide
- Cnitrogen trioxide
- Dnitrogen pentoxide
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Answer: B) Nitrous Oxide
Q135. Acid rain is caused by ______
- ASO² and NO²
- BNO² and O²
- CCO and CO²
- DSO² and O²
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Answer: A) SO² and NO²
Q136. What is 'Marble Cancer'?
- Ahuman cancer caused by mining
- BMarble erosion due to acid rain
- CDiseases in animals due to marble mines
- DSoil erosion due to marble mines
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Answer: B) Marble erosion due to acid rain
Q137. Ammonia is present in ______
- Anitrogen and hydrogen
- Bhydrogen and oxygen
- Csulfur and chlorine
- Dnitrogen and sulfur
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Answer: A) nitrogen and hydrogen
Q138. What is produced on an industrial scale by the 'Haber method'?
- Asulfuric acid
- Bnitric acid
- Cammonia
- Dsodium carbonate
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Answer: C) ammonia
Q139. Which catalyst is used in the production of ammonia by Haber's process?
- AIron
- BPlatinum
- CNickel
- DAlumina
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Answer: A) Iron
Q140. Which is one property of ammonia?
- AIt is insoluble in water.
- BIt is an odorless gas
- CIt is a yellow gas
- DRed litmus turns blue in its aqueous solution.
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Answer: D) Red litmus turns blue in its aqueous solution.
Q141. It is easily soluble in water---
- ACarbon
- Bnitrogen
- Cammonia
- DIodine
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Answer: C) ammonia
Q142. What is the valency of nitrogen in NH3?
- A2
- B4
- C1
- D3
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Answer: D) 3
Q143. Tear gas is_
- Aammonia
- Bhydrogen sulfide
- Chydrogen carbide
- Dchlorine
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Answer: A) ammonia
Q144. The smoke emanating from ammonium chloride powder used for cleaning hot utensils while tinning brass utensils is—
- Aof ammonia
- Bof carbon monoxide
- Cof hydrochloric acid
- Dof ammonia and hydrochloric acid
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Answer: D) of ammonia and hydrochloric acid
Q145. An unknown gas dissolves readily in water. Red litmus turns blue in aqueous solutions containing the gas. This gas also gives off white fumes when mixed with hydrogen chloride. This unknown gas is—
- ASO²
- BNO
- CNH³
- DCO
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Answer: C) NH³
Q146. Suitable conditions for the preparation of ammonia by Haber's process are ____
- Ahigh pressure and low temperature
- Bhigh pressure and high temperature
- Clow pressure and low temperature
- Dlow pressure and high temperature
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Answer: A) high pressure and low temperature
Q147. Aqua regia is a mixture of which of the following in the ratio of 1:3 by volume?
- AConcentrated HNO2 and Concentrated HCI
- BConcentrated HNO³ and concentrated H² SO⁴
- Cdilute HCI and dilute HNO³
- DConcentrated HCI and Concentrated HNO³
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Answer: A) Concentrated HNO2 and Concentrated HCI
Q148. In which acid does gold dissolve?
- Ain nitric acid
- Bin hydrochloric acid
- Cin sulfuric acid
- DIn Amtrak
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Answer: D) In Amtrak
Q149. Aqua regia is prepared by mixing concentrated HNO with what?
- AConcentrated H²SO⁴
- BConcentrated H³PO⁴
- CConcentrated HCI
- DConcentrated HBr
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Answer: C) Concentrated HCI
Q150. The molecular formula of phosphorus is_
- AP¹
- BP²
- CP³
- DP⁴
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Answer: D) P⁴