Question 35 to 50.
Q35) For the reaction (4HBr+O_{2}=2H_{2}O+2Br_{2}), the order of the reaction with respect to [O_{2}] is 1 and che overall
order is 3. What is the order with respect to [HBr]? (A) 1 (B) 2 (C) 3 (D) 4 Q36) The term "atom" comes from Greek word called (A) atomic (B) atoms (Atomos (D) atomais
237) expressed that all matter consists of a very small indivisible particle called atom.
(A) John Dalton(B) Democritus (C) Rutherford (D) none of these
Q38) A British scientist, John Dalton formulated a precise definition of atom in (1808 (B) 1803 (C) 1613 (D) 1500
Q39) A cathode ray tube was used to investigate an atomic structure called (A) proton (B) neutron (C) electron (D) all
of these
Q40) For a compound that contains 1.82g of K, 5.93g of 1, and 2.24g of O, the empirical formula is (A) KIO (B) KIO
(C) KIO: (D) KI₂O
Q41) Molar mass is the mass of one mole of a substance in (A)g/mol (B) gmol (C) g/dan^{3} (B) mol/dm³
Q42) is a formula which indicate the elements present in a compound and the relative number of atoms/ions of
each
Q43) How many chloride ions are there in a 25.00cm^{3} of a solution of Magnesium Chloride (MgCl2) of 0.4mol/dm³?
A (
1.20\times10^{22}(B)12\times10^{23}(C)2. 2.4\times10^{23} D) 6.02\times10^{23}
Q44) involves the breaking in the atoms of reacting substances and forming of new bonds between the atoms
of products. (A) Chemical equation (B) Chemical reaction (C) Stoichiometry (D) none of these. Q45) The reaction represented by the equation Zn) + CuSO4) ZnSO4(aq) + Cu) is (A) decomposition
(B) combustion (C) displacement (D) neutralization
Q46) Reaction that involves a change in oxidation state of one or more element is called (
A)oxidation (B)reduction (C) oxidizing agent (D)reducing agent.
Q47) During spontaneous redox reaction chemial energy is converted into electrical energy in (A) clectrolytic cell (B)
electrochemical cell(C) galvanic/voltaic cell (D) electrode.
Q48) In cell diagram, vertical lines (//) are used to represent (A) where reduction occurs (B) salt bridge (C) where
oxidation occurs (D) none of these
Q49) The conventional notation for representing galvanic/voltaic cell is called (A) Salt bridge (B) cell diagram (C) anode
(D) cathode.
Q50) Which one of them is the weakest? (A) Jonic bond(B) Covalent bond(C) Metallic Bond(D) van der Waals force
Q35) The order with respect to [HBr] can be determined by subtracting the order with respect to [O2] from the overall order. So the order with respect to [HBr] is 2 (B).
Q36) The term "atom" comes from the Greek word "atomos" (C)