Everyday Science MCQs

5120 MCQs  (Page 219 of 512)

Which of the following phenomenon is considered responsible for Global Warming?
A. Greenhouse effect
B. Fire in coal mines
C. Dry farming
D. Monsoon
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________?
A. P-electrons in ne(z = 10)
B. S-electrons in mg(z = 12)
C. D-electrons in fe(z = 26)
D. P-electrons in ci(z = 17)
The molecules of which gas have highest speed?
A. H2 at -73oc
B. Ch4 at 300 k
C. N2 at 1,027oc
D. O2 at 0oc
The main buffer system of the human blood is____________?
A. H2co3 – hco3
B. H2co3 – co32-
C. Ch3cooh – ch3coo–
D. Nh2conh2 – nh2conh+
The most commonly used bleaching agent is_________?
A. Alcohol
B. Carbon dioxide
C. Chlorine
D. Sodium chlorine
The heat required to raise the temperature of body by 1 K is called___________?
A. Specific heat
B. Thermal capacity
C. Water equivalent
D. None of the above
The octane number of zero is assigned to____________?
A. 2-methyl octane
B. N-heptane
C. Iso-octane
D. 3-methyl octane