MONTHLY TESTCHAPTER 1

SECTION A ( 05 marks)Q.1 Encircle the correct option i.e A/B/C/D. Each question carries one mark 1. what is the mass of aluminium in 204 g of the aluminium oxide, Al2O3 a. 26 g b. 27 g c. 54 g d. 108 g2. 36g of pure carbon is equivalent toa. 3 moles of C atoms.b. 3 x 6.02 x 1023 atoms of C.c. 1.806 x 1024 C atoms.d. All of these3. The volume occupied by 1g of H2 at STP isa. 22.4 dm3b. 24 dm3c. 11.2 dm3d. 22.4 cm34. When 0.1 Kg of CaCO3 is decomposed, the CO2 produced occupies, at STP, a volume equal to a. 2.2414 dm3.b. 22.414 dm3.c. 2 X 22.414 dm3.d. 3 X 22.414 dm3.5. One mole of ethanol and one mole of ethane have an equala. Mass b. number of atoms c. number of electrons d. number of molecules

SECTION B (09 marks)Q.2 Attempt ALL questions, Each question carries THREE marksi. 58.5 amu are termed as formula mass and not molecular mass of NaCl. Why?ii. a. what is conversion factor? B actual yield is always less than theoretical yield why?iii. How many covalent bonds and molecules are present in 9 g of H2O SECTION C (06 marks)Q.3. 200 g of K2Cr2O7 was reacted with 200 g conce H2SO4 according to the following equation K2Cr2O7 + 4 H2SO4 K2SO4 + Cr2(SO4)3 + 4H2O+ 3(O)Calculatea. Mass of atomic oxygen producedb. Mass of reactant left unreacted