81 The fruit of Sorghum is known as –
(A) Cypsela
(B) Caryopsis
(C) Achene
(D) Legume
82 The term biocoenosis was coined by –
(A) Tansley
(B) Carl Mobius
(C) Warming
(D) R. Mishra
83 Gibberellin was isolated from –
(A) Algae
(B) Fungus
(C) Bacteria
(D) Bryophyte
84 The instrument used to measure diameter of a tree trunk is called as –
(A) Alburnum
(B) Duramen
(C) Tyloses
(D) Dendrogram
85 Correct representation of Boyle’s law is –
86 Which is not correct statement in terms of kinetic theory of gases ?
(A) Gases are made up of small particles called molecules.
(B) The molecules are in random motion.
(C) When molecules collide, they lose energy.
(D) When the gas is heated, the molecules move faster.
87 Unit of surface tension :
(A) dynes cm--2
(B) ergs/cm
(C) Jm--1
(D) N m--1
88 The internal resistance to flow in liquid is called –
(A) Fluidity
(B) Specific resistance
(C) Viscosity
(D) Surface tension
89 Rain drops are spherical in shape bccause of-
(A) Surface tension
(B) Capillary action
(C) Downward motion
(D). Acceleration due to gravitanional
90 At room temperature, sodium crystallizes in a body centered cubic lattice with edg a=4.24 Å. The theoretical density of sodium (At. wt. of Na = 23) is
(A) 1.002 g cm
(B) 2.002 g cm
(C) 3.002 g cm
(D) 4.002 g cm
91. Which type of ‘defect’ has the presence of cations in the interstitial sites 2
(A) Frenkel defect
(B) Metal deficiency defect
(C) Schottky defect
(D) Vacancy defect
92 oordination number of sodium ion in sodium chloride crystal is –
(A) 3
(B) 4
(C) 6
(D) 8
93 Which of the following conditions is not correct for ideal solution ?
(A) No change in volume on mixing.
(B) No change in enthalpy on mixing.
(C) It obeys Raoult’s law.
(D) Ionisation of solute should occurs to a small extent.
94 The mole fraction of NaCl in a solution containing 1 mole of NaCI के 1000 g of water is-
(A) 0.0177
(B) 0.001
(C) 0.5
(D) 0.244
95 acording to Raoult’s law the relative lowering of vapour pressure for a solution is equal to – (A) Moles of solute
(B) Mole fraction of solvent
(C) Moles of solvent
(D) Mole fraction of solute
96 How many grams of NaOH will be needed to prepare 250 ml. of 0.1 M solution ?
(A) 1 g
(B) 10 g
(C) 4 g
(D) 6 g
97 Addition reaction of hypochlorous acid with propyne gives the product –
(A) 2, 2-Dichloropropane
(B) 1, 1-Dichloropropane
(C) 1-Chloropropanone
(D) 1-Chloropropanal
98 Arrange the following compounds in decreasing order of acidic strength –
(A) II > II >I
(B) I> II > III
(C) | > II > I
(D) II >I > III
99 Which of the following statemnts regarding s istarts NOT CORRECT molecules ?
(A) They have identical.
(B) They have nearly the same energy.
(C) They have same no. of electrons.
(D) They have identical bonding.
100 Staggered conformation of ethane is –
(A) equally stable as eclipsed conformation.
(B) more stable than eclipsed conformation.
(C) less stable than eclipsed conformation.
(D) impossible to exist.