The characteristic properties of an organic compound which depend on atom or group of atoms in its molecule is known as …………………
A) standard group
B) functional group
C) associate group
D) alkyl group
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A hydrogen atom moving at speed `v` collides with another hydrogen atom kept at rest .Find the minimum value of `v` for which one of the atoms may get
Correct Answer - `[7.2 xx 10^(4)m//s]`
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The mass of an atom of one carbon atom is 12.011 u. What is the mass of 20 atoms of the same isotope?
Mass of l atom of carbon = 12.011 u ∴ Mass of 20 atoms of same carbon isotope = 20 × 12.011 u = 240.220 u ∴ The mass of 20 atoms of same...
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The force of attraction between any two atoms or a group of atoms that results in a stable entity is called …………………
B) Chemical bond
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The valence shell of the central atom of a molecule has four bond pairs of electrons. Shape of the molecule is ……………..
D) Tetrahydral
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In a molecule AB there is a lone pair in the valence shell of central atom. The shape of molecule.
Correct option is C) Pyramidal
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Who opined when each molecule of carbohydrate is formed, one molecule of water and one molecule of oxygen
A) C.B. Van Neil
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A reaction in which an atom or a group of atoms in a compound is replaced by other atom or group of atoms is called ……………… reaction.
Correct option is C) substitution
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Combination of atoms of same elements is known as A) molecule B) element
Correct option is A) molecule
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The number of atoms constituting a molecule is known as its …………….
B) atomicity
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State the trends in the following properties of group 1 and group 2 elements down a group.
Sr. no. Property Down a group i Atomic radii Increases ii Ionic radii Increases iii Ionization enthalpy Decreases iv Electronegativity Decreases v Standard reduction potential Decreases
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