The molecules of which gas have highest speed?
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
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In SI base units, 1 Bq is equal to __________ ?
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B. 1.5 disintegration per second
C. 0.01 disintegration per second
D. 1 disintegration per secondWhen light is exposed to transition element then electrons jump from lower orbitals to higher orbitals in______________________?
When light is exposed to transition element then electrons jump from lower orbitals to higher orbitals in______________________?A. orbitals of f-subshell
B. orbitals of d-subshell
C. orbitals of p-subshell
D. both A & BThe percentage of suspended solid waste in raw water is removed by coagulation is__________________?
The percentage of suspended solid waste in raw water is removed by coagulation is__________________?A. 60
B. 70
C. 80
D. 90Which of the following properties prove that cathode rays are material in nature_________________?
Which of the following properties prove that cathode rays are material in nature_________________?A. they cast shadow
B. they possess momentum
C. they are negatively charged
D. all of the abovePercentage of lead in lead pencil is________?
Percentage of lead in lead pencil is________?A. Zero
B. 20
C. 80
D. 70The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?
The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?A. this acid, in ancient times, was used to eliminate ant-hills
B. this corrosive acid is secreted by ants to drive away their enemies
C. this acid was first obtained by the distillation of ants
D. ants are attracted by the odour of this acid