Science General Knowledge - Multiple Choice #2

Can you answer these general knowledge Science questions?
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Last updated: April 18, 2019
First submittedMarch 23, 2019
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1. Which of the following is colored gas?
Oxygen
Nitrogen
Nitrogen Dioxide
Hydrogen Sulphide
Nitrogen dioxide is reddish brown colored gas while other are colorless.
2. Father of Genetics
Darwin
Gregor Mendel
Watson
Glauber
3. In condition of equilibrium, sum of anticlockwise moments is equal to
sum of clockwise moments
None of the above
Couple of moment
4. Which one of the following is an assumption by by an observer?
Reaction force
Tension
Centrifugal force
Centripetal force
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.
Infinite
0
1
-1
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 ?
Decrease in kinetic energy is equal to work done on the body
Kinetic and potential energy is always equal
Potential energy is caused due to motion
Sum of potential and kinetic energy is constant
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 ?
Contact Process
Ostwald's Process
Baeyer's Process
Haber's Process
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

Exothermic
High Temperature
Reversible
High pressure
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
Methane
Nitric Acid
Acetic Acid
Alchemists called Nitric acid as Aqua fortis.
10. A physical balance is an example of
Class I lever
Class III lever
Not a lever
Class II lever
11. Which of the following element has highest electron affinity?
Argon
Magnesium
Sodium
Chlorine
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
Ionic, Co-valent and Co-ordinate
Ionic and Co-valent
Ionic
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
Cathode is oxidizing electrode
Active electrode takes part in electrolysis
Electrolysis is a redox reaction
14. Real image is always
Upright
Inverted
Magnified
Virtual
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
First Focus
Infinity
2f
Between First Focus and optical center
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
Forced
Damped
Resonance
17. Which of the following is not a ohmic resistor matched?
Nichrome
Solar cell
Metallic Conductors
Dilute H2SO4
Other are ohmic resistors.
18. S.I. unit of conductance is
ohm
siemen
Volt
ampere
19. Isontones has/have same
Atomic Number
Number of Protons
Number of Neutrons
Mass Number
20. Elimination of one β - particle causes
Mass number decreased by four
Atomic number decreased by two
Loss of energy only
Atomic number to decreased by one
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, Hydrogen Bomb
Nuclear Fusion, Atom Bomb
Nuclear Fusion, Hydrogen Bomb
Nuclear Fission, Nuclear Reactor
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
Phloem vessels
Thylakoids
Stroma
23. Hormones that promotes apical dominance
Cytokinins
Auxins
Gibbrellins
ABA
Gibbrellins promote internode growth.
Cytokinins inhibit apical dominance.
ABA is growth retarding hormone.
24. Increased number of RBCs is
Leukemia
Polycythaemia
Erythropenia
Leukemia is increased no. of WBCs (abnormally).
Erythropenia is abnormally decreased no. of RBCs.
25. Another term for sperm duct is
Afferent arteriole
Efferent duct
Epididymis
Vas deferens
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