Motion Education Junior Science Talent Search Exam Sample Question Paper : erp.motioniitjee.com

Organisation :  Motion Education Pvt. Ltd.
Exam : Junior Science Talent Search Exam
Document Type : Sample Question Paper
Category or Subject : Chemistry
Year : (2014-2015)

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Download Sample Question Paper : https://www.pdfquestion.in/uploads/9385-jstseChemistry%20QP.pdf

Junior Science Talent Search Sample Question Paper :

General Instructions:
** Read the following instructions carefully before you answer the questions. Answers are to be given on a separate answer sheet. Use only blue/black point pen.

Related : Aviral Talent Search Exam For Junior Sample Question Paper : www.pdfquestion.in/9377.html

**  Write your roll no. very clearly (one digit in one block) on this booklet and on the answer
**  sheet (OMR sheet) ?
**  This question paper comprises four Parts I, II, III and IV and you. See that parts I, II and III
contain forty questions each and Part IV contains 30 questions. Answer all the 150 questions.
** Answer each question by filling the correct alternative among the four choices on the answer  sheet as shown in example below Example:

51. Arrange the following in increasing order of their inter molecular force of attraction:
(i) Salt
(ii) Water
(iii) Carbon dioxide
a) iii < ii < i
b) i < ii < iii
c) ii < iii < i
d) iii < i < ii
52. separation method used for separating two miscible liquids:
a) Distillation
b) Evaporation
c) Separating funnel
d) Chromatography

53. A compound of carbon, hydrogen and nitrogen contains these elements in the ration of their atomic 9:1:3.5, if its molecular mass is 108 u what is its molecular formula?
a) C2 H 2 N
b) C3 H 4 N
c) C2 H 2 N
d) C6 H 8 N2

54. The correct chemical formula of the given compounds aluminum Phosphate, Ammonium Carbonate and Sodium Sulphitere:
a) Al2 ( PO4 ) 3 , ( NH 4 ) 2 CO3 , Na2 SO4
b) AlPO4 , NH 4 CO3 , Na2 SO3
c) Al ( PO4 ) 3 , ( NH 4 ) 2 CO3 , Na2 SO4
d) Al2 PO4 , ( NH 4 ) 2 CO3 , Na2 SO3

55. The process of respiration is
a) Oxidation reaction which is endothermic
b) Reduction reaction which is endothermic
c) Combination reaction which is exothermic
d) Oxidation reaction which is exothermic

56. Orthoboric Acid used as mild antiseptic for eyes is: a)
H 3 BO2
b) H 2 B4 O7
c) B (OH )3
d) Na2 B4 O7

57. Chemical symbol of Antimony is:
a) As
b) Sb
c) At
d) Am

58. Which chemical is not used for preventing coloured food material: a) SO2
b) Vit-C
c) Sodium benzoate
d) BHA

61. The diagram given below show the electron arrangement in the outer shell of 1, 2, 3, 4 and 5. All the elements are from period 3 of the periodic table Which two elements farm a cavalent compound with YZ2 type formula
a) 5 and 2
b) 1 and 2
c) 3 and 4
d) 1 and 5

62. Which weigh the maximum?
a) 2.24 L of CO2 at STP
b) 6.022 ?1023 molecules of CO2
c) 6.022 ?1023 atoms of carbon
d) 10 g of CO2

63. Glyptal is an example of:
a) Soap
b) Detergent
c) Polymer
d) Fibre

64. In solid state, molar mass of Sulphur is:
a) 16 g
b) 32 g
c) 256 g
d) 128 g

65. Silver articles become black when exposed to air. It is due to the formation of:
a) Silver Oxide
b) Silver Nitrate
c) Silver Chloride
d) Silver Sulphide

66. 4.4 g of an unknown gas occupies 2.24 L of volume under STP conditions. The gas may be:
a) CO2
b) CO
c) O2
d) SO2

67. 2.5 L of 1 M NaOH solution is mixed with 3 L of 0.5 M NaOH solution. The molarity of resulting solution is:
a) 0.08 M
b) 1.0 M
c) 0.73 M
d) 0.50 M

68. The label of a breakfast cereal showed that it contained 110 mg of sodium per 100 g of the cereal. The mass percent of sodium in the cereal is:
a) 1.10%
b) 0.110%
c) 0.011%
d) 11.0%

69. The formula or phosphate salt of a metal is MPO4 . The formula of its nitrate salt will be:
a) MNO3
b) M (NO3)2
c) M 2 (NO3)3
d) M (NO3) 3

70. At higher altitude (mountains) people add common salt to water to boil potatoes. This is done to:
a) Increase boiling point of water
b) Decrease boiling point of water
c) Cook salty potatoes
d) None of the above

71. Mercury is used in thermometers because it has:
a) Lowest heat of fusion
b) Lowest specific heat among all the liquids
c) High specific heat among all the liquids
d) Highest Latent heat of fusion

72. Which of the following will not show tyndall effect:
a) Blood
b) Starch solution
c) CuSO4 solution
d) Sulphur solution

73. Valency of phosphorous is:
a) 1, 3, 5
b) Only 3
c) Only 5
d) 3 and 5 both

74. Arrange the following in order of increasing their calorific value:
a) Petrol
b) Wood
c) Cow dung cake
d) Biogas
(i) a < b < c < d
(ii) b < a < d < c
(iii) c < b < a < d
(iv) d < b < a < c

75. Florescent tube glows because of:
a) Plasma
b) Phosphorous
c) Sulphur
d) Hydrogen