Which of the following metal occurs in free state ______________?
Which of the following metal occurs in free state ______________?
A. Lead
B. Iron
C. Mercury
D. Copper
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Coke is made by heating coal in the absence of air at__________?
Coke is made by heating coal in the absence of air at__________?A. 700 °C
B. 900 °C
C. 1300 °C
D. 1700 °CBy which process does the smell of cooking spread to all the rooms in a house?
By which process does the smell of cooking spread to all the rooms in a house?A. Distillation
B. Diffusion
C. Decomposition
D. DisplacementIf someone is cooking in the kitchen, the smell travels around the house to other rooms. This is because of diffusion , the movement of particles from an area of high concentration to an area of low concentration.
Moon light reaches to earth in___________seconds?
Moon light reaches to earth in___________seconds?
A. 0.3 seconds
B. 1.3 seconds
C. 2.3 seconds
D. 3.3 secondsWhat is the element required for solar energy conversion ______?
What is the element required for solar energy conversion ______?
A. Ultra pure carbon
B. Silicon
C. Beryllium
D. TantalumThe vitamin Folate works together with __________ to produce new red blood cells?
The vitamin Folate works together with __________ to produce new red blood cells?
A. Vitamin D
B. Vitamin A
C. Vitamin B-12
D. None of the aboveThe sun is containing _______ % mass of the solar system?
The sun is containing _______ % mass of the solar system?
A. 75.24%
B. 79.36%
C. 89.10%
D. 99.86%