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“1, , ‘%., , CHEMICAL REACTIONS AND, EQUATIONS, , q MULTIPLE CHOICE QUESTIONS y, , Select the correct answer :, , wi., , Ans., , Ans., , Ans., S&P 4., , Ans., , Ans., , Ans., , The chemical reaction given below represents :, , BaCl,(aq) + Na,SO4(aq)—* — BaSO,(s) + 2 NaCl(aq), , (A) Decomposition reaction (B) Displacement reaction, , (C) Combination reaction (D) Double displacement reaction., , (D), , The chemical reaction in which heat energy is given out is called :, (A) Polymerisation reaction (B) Endothermic reaction, , (C) Exothermic reaction (D) All., , (C), , During electrolysis, hydrogen and oxygen are produced in the ratio by, volume :, , (A) 2:1 (B) 1:1, (C) 2:2 (D) 4:1., (A), , The chemical formula of rust is :, , (A) Fe,03 (B) FeCO3, , (C) Fe 03 .xH,0 (D) FeCO3, xH,0., , (C), Which is an example of decomposition reaction ?, , (A) CH, + 202 —+ CO2 + 2H20, , (B) 2Pb (NO3)2 —4., 2PbO + 4NOy + Og, (C) NH; +HCl — NH,Cl, , (D) Pb+CuCly — PbCly + Cu., , (B), , Iron displaces which of the following metals from its salt solution :, ( A) Al (B) Zn, , (Cc) Cu (D) Au., , (C)
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chips oxyseP in replaced by sae:, a packet of 2) 50s -_, 4 o C02 cy Ow a, i, 4) Nog, « Ne, i + Culs), oe tus ) ——> ZnSOg(na) _, a ola wr ebemical reaction is shown by the ahove equation? ear 17., | type, What Mbintion reaction, . Dissociation reaction, 2 suction, 4) Displacement re 7, a pate displacement reaction,, (, - i : the combustion of, < pat is the colour of powder obtained after nical big, ws. MN, Blk (B) Brown ., o White ' (D) Yellow., s. (C) . ., “a Presence of which gas is necessary for combustion of magnesiyg,, ribbon ?, (A) CO, (B) co, (C) Hy (D) O,., s. (D) |, a he reactants separated by add sign (+) are placeq, , 1). Inachemical equation t :, on which side of arrow sign (+), (B) Left, , (A) Right, (C) Upwards (D) Downwards., Ans. (B) ., According to law of conservation of mass, what is neither created nor, , er 12. ¢, destroyed in a chemical reaction ?, (B) Substance, , (A) Matter, (C) Mass (D) None., Ans. (C), 13. Inachemical equation when number of atoms of elements on both sides, of the arrow are equal, what is this equation called ?, (A) Skeletal equation (B) Complete equation, (C) Unbalanced (D) Balanced equation., , Ans. (D), While balancing a chemical equation which atom of a compound is, , 14,, balanced first for convenience., in | ee are less (B) Which are maximum, nyone, aa oa (D) None., , "15. What breaks and forms in a chemical reaction to produce 5¢*, , substances ?, (A) Mutual bonds (B) Mutual combination, , Cc) ) : :, te "4 Mutual separation (D) Mutual relation.
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ASTER GUM SAMPLE FAnery, , , , MAD EXAMINA FIC NM., Og + 2he, this reaction ia:, , , , 41, Fe,0, + 2A1— 2Al,, (A) combination (B) displacement, (C) dissoviation (D) double displacement,, Ans. (B), eaction is:, , 42. CaCO,—> CaO + COg, this r, (A) displacement (B) dissociation with heat, (C) combination, , Ans. (B), Which gas is used to prevent rancidity of food items ?, , (B) Hydrogen, (D) Chlorine. ey, , (D) exothermic,, , (A) Oxygen, (C) Nitrogen, Ans. (C), , 44, What type of reaction is respiration ?, (B) Exothermic, , (D) None., , (A) Endothermic, (C) Combination, , Ans. (B)
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SCIENCE, 16., , Ans., ow 17., , 19., , 21., , Ans., , Chemical formula of marble is :, , (A) CaO (B) Ca(OH),, , (C) CaCO, (D) CaO0Cl,., , (C) ., , C6H 120, (aq) + 60,(aq) + 6H,O(1) —* 6CO,(aq) + 12H, O(/) + energy, What is the special name of this reaction ?, , (A) Displacement (B) Dissociation, , (C) Respiration (D) Double displacment., , (C), , What type of reaction is during change of calcium carbonate into calcium, oxide and carbon dioxide ?, , (A) Combination (B) Dissociation, , (C) Displacement (D) Double displacement., , (B), , What type of reaction is 2AgCl(s) e+ 2 Agis) + Cl,(g) ?, (A) Endothermic (B) Exothermic, , (C) Heat insulated (D) Heat sensitive., , (A), , Which gas is flushed into the packets of chips by manufactures of chips ?, (A) CO, (B) SO,, , (C) Ny (D) O,., , (C), , Following reaction is : 4NH,(g) + SO,(g) —* 4NO(g) + 6H,O(g), (I) displacement reaction, , (II) combination reaction, , (ID redox reaction, , (IV) neutrilization reaction., , (A) (1) (IV) (B) (II) (I), (C) (1) du) (D) (ID (TV)., (C), , Which one is double displacement reaction 7?, (1) Pb+CuCl,— PbCl, + Cu, , (I) Na,SO, + BaCl, — BaSO, + 2NaCl, (ll) C+O,—* co,, , (IV) CH, + 20,—* cO,+ 2H,O, (B) only (I}), , (A) (1) dV), , (C) (1) (i) (D) (IID) (IV)., , (B), , Which of the gases are used for the long time storage of oil ?, (A) CO,, 05 (B) Np, O,, , (C) CO,, He (D) He, Ny., , )
