An ordinary clock loses time in summer.This is because
The length of the pendulum increases and time period increases
The length of the pendulum increases and time period decreases
The length of the pendulum decreases and time period increases
The length of the pendulum decreases and time period decreases
If a large number of people are enclosed in a room, then
Oxygen decreases and carbon dioxide increases
Oxygen increases and carbon dioxide decrease
Both oxygen and carbon dioxide decrease
Both oxygen and carbon dioxide increase
Which of the following is a balanced fertiliser for plants ?
Green colour of plants is due to the presence of
When a person moves from poles to the equator, the population of plants and animals will
Not show any consistent behavior
Why is it advisable not to draw current for many appliances from a single point ?
Current will decrease
Current will increase
Current and voltage both will increase
Voltage will decrease whereas current will increase
Identical twins are born when
Two sperms fertilise one ovum
Two sperms fertilise two ovums simultaneously
One sperm fertilises the ovum and zygote divides into two separate cells developing independently
One sperm fertilises two ovums
A person with which blood group will be a universal donor?
Why camphor disappears when kept on a plate?
It reacts with the metal of the container
It reacts with the gases of the air
None of the above
The rich source of iron is
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