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Everyday Science MCQs
Everyday Science MCQs
5120 MCQs (Page 302 of 512)
Attempt Everyday Science MCQs Quiz
In pig iron the concentration of C-atom is ___________________?
A. 0.12 — 0.25%
B. 2.5 — 4.5%
C. 2.0 — 4.0%
D. 0.25 — 2.5%
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With impurities like P and S the open hearth furnace is lined with ?
A. Sio2
B. Fe2o3
C. Feo
D. Cao mgo
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The reduction potential Zn is_________________?
A. 0.76
B. -0.76
C. -0.55
D. 0.55
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Coordination number of the transition element in [Pt Cl NO2 (NH3)4]2- is____________________?
A. 2
B. 6
C. 4
D. 8
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The oxidation number of central metal atom in [Ni(CO)4] is_________________?
A. 0
B. 2
C. 4
D. 6
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Group VIB of transition elements contains___________________?
A. Zn cd hg
B. Fe ru os
C. Cr mo w
D. Mn te re
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The leements in which d or f orbitals are in the process of completion are__________________?
A. Outer transition elements
B. Inner transition elements
C. Typical transition elements
D. Transition elements
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The melting points and boiling points upto meddle of 3d- series ____________________?
A. Increases
B. Decreases
C. Remain same
D. No regular trend
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Pure metal__________________?
A. Corrode slowly
B. Corrode rapidly
C. Does not corrode easily
D. None of these
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The correct electronic configuration of Cr is____________________?
A. [ar]4s23d4
B. [ar] 4s23d4
C. [ar]4s03d5
D. [ar]4s13d5
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