Mixtures and Compounds NDA Questions

NDA Chemistry

Mixtures and Compounds MCQ Questions


13.
The sodium hydroxide solution at the surface reacts with the Carbon dioxide in the atmosphere to form
A.
Sodium chloride
B.
Sodium carbonate
C.
Sodium borohydride
D.
None of these
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ANSWER :
B. Sodium carbonate
14.
The carbonates of lithium and magnesium decompose easily on heating to form the _____
A.
Oxides
B.
Carbon dioxide
C.
Both a and b
D.
Amino
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ANSWER :
C. Both a and b
15.
What is the solubility of sodium chloride in 100 g of water at 273 K?
A.
21 g
B.
36 g
C.
50 g
D.
79 g
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ANSWER :
B. 36 g
16.
In blood plasma, sodium is present to the extent of _____ mmolLห‰ยน
A.
143
B.
200
C.
120
D.
198
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ANSWER :
A. 143
17.
Within red blood cells, the potassium level is only _____ mmolLห‰ยน
A.
3
B.
4
C.
5
D.
6
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ANSWER :
C. 5
18.
_____ ions are the most abundant cations within cell fluids, where they activate many enzymes, participate in the oxidation of glucose to produce ATP
A.
Carbon
B.
Sodium
C.
Nitrogen
D.
Potassium
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ANSWER :
D. Potassium