SawaalBoxसवाल बॉक्स
2008 · Q115Science & TechnologyHealth & Diseaseseasy

Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?

  1. (a)Hydrogen and oxygen
  2. (b)Oxygen and acetylene
  3. (c)Methane and air
  4. (d)Carbon dioxide and methane
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Official answer(c) Methane and air

2022 · Q39Science & TechnologyHealth & Diseasesmoderate

In the context of vaccines manufactured to prevent COVID-19 pandemic, consider the following statements : 1. The Serum Institute of India produced COVID-19 vaccine named Covishield using mRNA platform. 2. Sputnik V vaccine is manufactured using vector based platform. 3. COVAXIN is an inactivated pathogen based vaccine. Which of the statements given above are correct ?

  1. (a)1 and 2 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(b) 2 and 3 only