If 1/14 gram of N₂ has 'n' molecules, how many molecules are present in 46 gm NO₂?

Formula of chloride of element M is MCl₄ and molecular weight is 154. Atomic weight of M?

Consider the following statements: 1. The temporary hardness in water is due to the presence of bicarbonates of calcium. 2. The permanent hardness in water is due to the presence of soluble chlorides…

The Nobel Prize in Chemistry, 2019 was awarded for the development of

Match List-I (oxidation number) with List-II (the element) and select the correct answer using the codes given below the lists : List-I A. 2 B. 3 C. 4 D. 6 List-II 1. Oxidation number of Mn in MnO₂ 2…

Three scientists who got Nobel Prize in chemistry in 2025 are from