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For the following questions answer them individually
USB stands for
Unique Serial Bus
Universal Serial Bus
Unary Serial Bus
Universal Secondary Bus
In computer network terminology, WAN stands for
World area network
Wide area network
Wide array net
Wireless area network
Which element produces hydrogen on reaction with strong alkali ?
Si
C
P
S
Which metal does not react with dilute $$H_2SO_4$$?
Pb
Fe
Zn
Mg
The unit of rate of reaction is
Mol lit$$^{-1}$$ sec$$^{-1}$$
Sec mol$$^{-1}$$
Moles sec$$^{-1}$$
Joules sec$$^{-1}$$
Salt that dissolves in aqueous ammonia solution is
$$HgCl_2$$
$$PbCl_2$$
$$Cu(OH)_2$$
$$Al(OH)_3$$
Residence time of water molecule in the ocean is
3.5 years
3.5 million years
35 years
35000 years
Biotic environment includes
Producers
Consumers
Decomposers
All the above
A natural phenomenon that becomes harmful due to pollution is
Global warming
Ecological balance
Greenhouse effect
Desertification
Decomposers include
Bacteria
Fungi
Both Bacteria and Fungi
Animals
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