Everyday Science MCQs

5120 MCQs  (Page 395 of 512)

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_________ stimulates the production of gastric juice in the stomach:
A. Gastrin
B. Enterokinase
C. Rennin
D. None of these
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Our atmosphere comprises of __________ Nitrogen?
A. 38% nitrogen
B. 58% nitrogen
C. 78% nitrogen
D. None of these
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Our atmosphere consists of___________ Oxygen approximately?
A. 11% oxygen approximately
B. 21% oxygen approximately
C. 31% oxygen approximately
D. None of these
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Our atmosphere consists of__________ CO2?
A. 0.03 to 0.04% co2
B. 0.3 to 0.4% co2
C. 3 to 4% co2
D. None of these
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Which one of the following element has highest oxidation state in its compounds ?
A. Cr
B. Mn
C. Sn
D. O
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Which of the following possesses maximum hydration energy ?
A. Na+
B. K+
C. Mg+2
D. Ca+2
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The atoms of same element having same atomic number but different mass number are called____________________?
A. Isobars
B. Isomers
C. Isotopes
D. Isotropes
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Which of the following ion is stable in aqueous solution ?
A. H+
B. H-
C. Cl-
D. All are stable
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An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________?
A. Group ii-a
B. Group iv-a
C. Group vii-a
D. Group vi-a
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The atomic radii decreases by increasing atomic number in________________?
A. Alkali metal
B. Alkaline earth metal
C. Elements from li to ne
D. Halogens
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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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