41. Which of the following oxides is formed when potassium metal is burnt in excess air ?
(A) K2O2
(B) KO2
(C) KO
(D) K2O|
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42. The structure of XeF4 is –
(A) Trigonal bipyramidal
(B) Pyramidal
(C) Tetrahedral
(D) Square planar
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43. The PSLV rocket uses –
(A) Both solid and biliquid propellants
(B) Oniy biliquid propellants
(C) Oniy monoliquid propellants
(D) Only solid propellants
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44. Which polymers occur naturally ?
(A) Proteins and PVC
(B) Proteins and Nylon
(C) Starch and Cellulose
(D) Starch and Nylon
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45. Which one of the following is an example of Heterogeneous catalysis ?
(A) C12H22O11 (aq) + H2O(1) H2SO4(1) C6H1206(aq) + C6H12O6(aq)
(B) N2(g) + 3H2(g) :
(C) CHCOOCHA
(D) 2SO2(g) +O2
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46. Mark the correct statement for a reversiule reaction –
(A) Catalyst increases the rate of forward reaction and decreases the rate of backward reaction.
(B) Catalyst catalyses only the backwara reaction.
(C) Catalyst affects forward and backward reactions to the same extent.
(D) Catalyst catalyses the forwad reaction.
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47. Deposition of bluish-green coloum substance on copper-utensils occurs due to the formation of the following :
(A) CuO
(B) Cu(OH)2 . CuCO3
(C) Cu(OH)2
(D) CuCO3
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48. Which of the following reactions is not i redox ?
(A) I2 + 2S2O3-2 → 2I– + S4O6-2
(B) BaCl2 + Na2SO4 → 2 NaCl + BaSO4
(C) 2KBr + Cl2 → 2 KCI + Br2
(D) 2KCIO3 → 2 KCI + 3O2
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49. Brown colour of apple after cutting is due to –
(A) Biological change
(B) No change
(C) Chemical change
(D) Physical change
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50. the reaction 2 Na + Cl2 → 2NaCl, number of electrons released by 5 g of Na is –
(A) 3.01 × 1023
(B) 1.204 × 1024
(C) 6.023 × 1023
(D) 1.024 × 1024
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51. Seetamata Sanctuary in Rajasthan is famous for –
(A) Lion
(B) Crane
(C) Flying Squirrel
(D) Black Deer
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52. According to the forest policy, how much percentage of area should come under forest ?
(A) 15%
(B) 25%
(C) 33%
(D) 20%
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53. The ‘doab plain’ of Ghaggar in Hanumangarh and Sriganganagar districts of Rajasthan is formed by which of the two rivers deposition ?
(A) Ghaggar and Beas rivers
(B) Jawai and Sukri rivers
(C) Ghaggar and Sutlej rivers
(D) Banas and Banganga rivers
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54. Mark the correct match –
(A) Dabala – Singhana – Baryte
(B) Jlhamra – Kotara – Iron ore
(C) Rajpura – Dariba – Gold
(D) Khetri – Singhana – Copper
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55. Which one of the following district in Rajasthan stands first in terms of dairy milk collection ?
(A) Bharatpur
(B) Jaipur
(C) Bikaner
(D) Alwar
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56. Which one of the following grass is best fodder for dairy cattle in Western Rajasthan ?
(A) Doob
(B) Khus-Khus
(C) Dhaman
(D) Seven
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57. Select the incorrect pair –
Present Name – Ancient Name
(A) Bharatpur – Virat
(B) Jalore – Swarangiri
(C) Udaipur – Shivi
(D) Ganganagar – Yoddheye
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58. According to the census 2011 which of the following districts of Rajasthan has high literacy rate. Identify the correct order of districts with literacy rate in descending order.
(A) Jaipur, Kota, Alwar, Sikar, Jhunjhunu
(B) Alwar, Jhunjhunu, Sikar, Jaipur, Kota
(C) Kota, Jaipur, Jhunjhunu, Sikar, Alwar
(D) Sikar, Jaipur, Jhunjhunu, Alwar, Kota
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59. Identify the correct order –
(A) Pong Dam – Chambal river
(B) Sidhmukh Canal – Yamuna river
(C) Meja Dam – Khari river
(D) Bisalpur Dam – Banas river
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60. Maximum areas of soil erosion in Rajasthan is found at –
(A) Sirohi
(B) Dungarpur
(C) Hadoti Plateau
(D) Sriganganagar
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