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(b) Dobereiner
(c) It has 18 vertical columns known as Groups.
(b) decreasing atomic number.
(c) K
(c) 5 - 8% acetic acid in water
(c) 5 – 8% acetic acid in water
(b) presence of sunlight.
(c) carbon
(d) all of the above
(c) three pairs of electrons are shared.
(c) by sharing electrons
The concept of triads in the elements was given by
(b) Dobereiner
(b) Dobereiner
See lessWhich of the following statements about the Modern Periodic Table is correct ?
(c) It has 18 vertical columns known as Groups.
(c) It has 18 vertical columns known as Groups.
See lessAccording to Mendeleev’s periodic law, the element were arranged in the periodic table in the order of
(b) decreasing atomic number.
(b) decreasing atomic number.
See lessWhich of the following element would loss an electron easily ?
(c) K
(c) K
See lessVinegar is a solution of
(c) 5 - 8% acetic acid in water
(c) 5 – 8% acetic acid in water
See lesschlorine reacts with unsaturated hydrocarbons at room temperature in the
(b) presence of sunlight.
(b) presence of sunlight.
See lessBuckminsterfullerene is an allotropic form of
(c) carbon
(c) carbon
See lessWhich of the following are allotropes of carbon ?
(d) all of the above
(d) all of the above
See lessIn the formation of nitrogen molecule,
(c) three pairs of electrons are shared.
(c) three pairs of electrons are shared.
See lessCarbon forms bonds with other atoms
(c) by sharing electrons
(c) by sharing electrons
See less