Chemistry MCQs

Page No. 118

Which of the following is not a macromolecule ?


asand


bhaemoglobin


cdiamond


dmaltose


View Answer maltose

Percentage of calcium in calcium carbonate is___________________?


a80%


b30%


c40%


d20%


View Answer 40%

How many isotopes have odd atomic number ?


a154


b280


c86


d300


View Answer 86

The number of moles of CO2 which contains 16 g of oxygen is__________________?


a0.25


b0.5


c0.75


d1


View Answer 0.5

The volume occupied by 2.8 g of N2 at STP______________________?


a2.24 dm3


b22.4 dm3


c1.12 dm3


d112 dm3


View Answer 2.24 dm3

Which one of the following has the maximum number of isotopes ?


aoxygen


bcarbon


ctin


dchlorine


View Answer tin

Moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________?


a0.18 mole


b0.27 mole


c0.24 mole


d0.09 mole


View Answer 0.18 mole

Which of the following terms is not used for ionic compound ?


aformula unit


bempirical formula


cmolecular formula


dformula mass


View Answer molecular formula

The number of isotopes of elements with even mass number and even atomic number are ________________?


a280


b300


c154


d54


View Answer 154

One mole of CO2 contains?


a6.022 x 1023 atoms of oxygen


b22-gram electrons


c6.022 x 1023 atms of carbon


dboth B. & C.


View Answer both B. & C.

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