Everyday Science MCQs

5120 MCQs  (Page 177 of 512)

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CuSO4 + Zn?ZnSO4+Cu is___________________?
A. Spontaneous reaction
B. Non-spontaneous reaction
C. Endothermic
D. Exothermic
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Total energy of a system is_________________?
A. P.e + k.e
B. P.e + heat energy
C. K.e + heat energy
D. P.e + mechanical energy
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Unit of heat in SI system is________________?
A. J
B. Kcal
C. Cal
D. Gj
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________________ is study about energy of a chemical system ?
A. Thermochemistry
B. Thermodynamics
C. Chemical kinetics
D. Stoichiometry
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Which of the following has strongest intermolecular forces of attraction ?
A. Hydrogen (h2)
B. Chlorine (cl2)
C. Lodine (i2)
D. Methane (ch4)
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When substance moves from a solid to a liquid state all of the following changes occur except__________________?
A. Molecules become more disordered
B. K.e of the molecules decreases
C. Intermolecular forces become weaker
D. Molecule become further separated
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In order to mention the boiling point of water at 110°C the external pressure should be ?
A. Between 760 torr and 1200 torr
B. Between 200 torr and 760 torr
C. 765 torr
D. Any value of pressure
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Vapour pressure of water at 100°C is___________________?
A. 55 mm hg
B. 760 mm hg
C. 355 mm hg
D. 1489 mm hg
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Liquid crystal is discovered by __________________?
A. William crooks
B. Fredrack reinitzer
C. J.j thomson
D. Bravis
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Hydrogen bonding is involved in____________________?
A. Solubility
B. Cleansing action of detergents
C. Biological molecules
D. All
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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