MCQ - NIOS Class 10 Science & Technology Average atomic mass of carbon is 12.01 u. Find the number of moles of carbon in (a) 2.0 g of carbon. (b) 8.0 g of carbon. 08/03/2023 WNA24 148 Views 0 Comments Read more
MCQ - NIOS Class 10 Science & Technology Refer to atomic masses given in the Table (3.2) of this chapter. Calculate themolar masses of each of the following compounds : 08/03/2023 WNA24 189 Views 0 Comments Read more
MCQ - NIOS Class 10 Science & Technology Assume that human body is 80% water. Calculate the number of molecules ofwater that are present in the body of a person whose weight is 65 kg. 08/03/2023 WNA24 138 Views 0 Comments Read more
MCQ - NIOS Class 10 Science & Technology How many molecules of O2 are in 8.0 g of oxygen? If the O2 molecules werecompletely split into O (Oxygen atoms), how many moles of atoms of oxygenwould be obtained? 08/03/2023 WNA24 84 Views 0 Comments Read more
MCQ - NIOS Class 10 Science & Technology Charge of one electron is 1.6022×10–19 coulomb. What is the total charge on1 mole of electrons? 08/03/2023 WNA24 111 Views 0 Comments Read more
MCQ - NIOS Class 10 Science & Technology How does an element differ from a compound? Explain with suitable examples. 08/03/2023 WNA24 94 Views 0 Comments Read more
MCQ - NIOS Class 10 Science & Technology Boron has two isotopes with masses 10.13 u and 11.01 u and abundance of19.77% and 80.23% respectively. What is the average atomic mass of boron? 08/03/2023 WNA24 153 Views 0 Comments Read more
MCQ - NIOS Class 10 Science & Technology Write the number of protons, neutrons and electron in each of the following isotopes: 2H1 , 18O8, 19F9 , 40Ca20. 08/03/2023 WNA24 88 Views 0 Comments Read more
MCQ - NIOS Class 10 Science & Technology What is the atomic theory proposed by John Dalton? What changes have taken place in the theory during the last two centuries? 08/03/2023 WNA24 130 Views 0 Comments Read more
MCQ - NIOS Class 10 Science & Technology What is the molar mass of NaCl ? 08/03/2023 WNA24 88 Views 0 Comments Read more