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1.Which of the following is colored gas?
Hydrogen Sulphide
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Oxygen
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Nitrogen Dioxide
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Nitrogen
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Nitrogen dioxide is reddish brown colored gas while other are colorless.
2.Father of Genetics
Watson
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Glauber
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Darwin
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Gregor Mendel
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3.In condition of equilibrium, sum of anticlockwise moments is equal to
None of the above
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Couple of moment
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sum of clockwise moments
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4.Which one of the following is an assumption by by an observer?
Tension
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Centrifugal force
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Centripetal force
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Reaction force
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Centripetal, Reaction and Tension are actual force while centrifugal force is assumed by an observer.
5.Work done when the angle between displacement and direction of force is 90 degrees.
-1
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Infinite
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0
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1
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θ=90 degree W=F x S x cos θ and cos 90 degree = 0. Hence,W = 0
6.Which of the following statement is correct ?
Kinetic and potential energy is always equal
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Sum of potential and kinetic energy is constant
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Decrease in kinetic energy is equal to work done on the body
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Potential energy is caused due to motion
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K.E. can be equal to U but not always. According to work - energy theorem,Increase in K.E = Work done and U + K.E. = constant
7.Manufacture of Ammonia is done by which of the following processes ?
Ostwald's Process
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Contact Process
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Baeyer's Process
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Haber's Process
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Baeyer's process for Extraction of Aluminium.... Ostwald's Process for Nitric acid Contact Process for Sulphuric acid Haber's Process for Ammonia
8.Which of the following is wrong related to the following reaction?
N2 + 3H2 -> 2NH3
Reversible
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High Temperature
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Exothermic
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High pressure
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The above reaction is exothermic, reversible and proceeds in hingh pressure and low temperature.
9.Which among the following is known as Aqua Fortis?
Hydrochloric Acid
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Nitric Acid
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Methane
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Acetic Acid
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Alchemists called Nitric acid as Aqua fortis.
10.A physical balance is an example of
Not a lever
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Class II lever
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Class III lever
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Class I lever
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11.Which of the following element has highest electron affinity?
Chlorine
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Magnesium
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Argon
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Sodium
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On moving across a period electron affinity increases and since Argon, having stable electronic configuration, has zero electron affinity. So chlorine has highest electron affinity among given options.
12.Bonding present in NH4Cl includes
Co-valent and Co-ordinate
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Ionic
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Ionic and Co-valent
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Ionic, Co-valent and Co-ordinate
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Its N-atom consists of covalent bonds with three H-atoms and one coordinate bond with H-Atom and this ammonium ion is electrovalently bonded with chlorine ion.
13.Considering Electrolysis, which one from the following statements is wrong?
Anions migrate towards anode
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Electrolysis is a redox reaction
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Active electrode takes part in electrolysis
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Cathode is oxidizing electrode
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14.Real image is always
Upright
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Magnified
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Virtual
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Inverted
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Virtual image is upright. Real image can magnified, diminished or equal size. A real can't be a virtual image(both are opposite).
15.In case of a convex lens, image is formed at infinity when object is at
Infinity
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Between First Focus and optical center
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2f✓
First Focus
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Object at infinity, image at focus. Object at 2f,image at 2f Object Between First Focus and optical center,image behind object
16.Vibrations of decreasing amplitude are
Natural
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Resonance
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Damped
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Forced
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17.Which of the following is not a ohmic resistor matched?
Nichrome
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Dilute H2SO4✓
Metallic Conductors
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Solar cell
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Other are ohmic resistors.
18.S.I. unit of conductance is
Volt
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siemen
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ampere
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ohm
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19.Isontones has/have same
Atomic Number
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Mass Number
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Number of Protons
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Number of Neutrons
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20.Elimination of one β - particle causes
Atomic number to decreased by one
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Atomic number decreased by two
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Mass number decreased by four
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Loss of energy only
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Mass number decreases by four and atomic no. decreases by two , when one α - particle is emitted. Loss of energy takes place when γ - particle is emitted.
21.Combination of two light nuclei is known as ____ on which ________ is based.
Nuclear Fission, Nuclear Reactor
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Nuclear Fission, Hydrogen Bomb
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Nuclear Fusion, Atom Bomb
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Nuclear Fusion, Hydrogen Bomb
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Nuclear Fission is split of a heavy nucleus. Nuclear reactor and atom bomb is based on Nuclear Fission.
22.Photo-Chemical phase of photosynthesis takes place in
Thylakoids
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Phloem vessels
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Stroma
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23.Hormones that promotes apical dominance
Gibbrellins
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ABA
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Auxins
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Cytokinins
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Gibbrellins promote internode growth. Cytokinins inhibit apical dominance. ABA is growth retarding hormone.
24.Increased number of RBCs is
Erythropenia
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Leukemia
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Polycythaemia
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Leukemia is increased no. of WBCs (abnormally). Erythropenia is abnormally decreased no. of RBCs.