Chemistry Class 9th
281- The sign of delta is.
A) g
B) &
C) δ
282-The delta indicates the partial
A) Positive
B) Negative
C) Both a and b
283- The compounds resulting from polar covalent bond
A) Polar compound
B) Non-polar compound
C) Dative bond
284-Metallic bond is formed between ______ atoms.
A) Bond
B) Metal
C) Molecules
285- In metallic bond _____ charge ions is used
A) Positively
B) Negatively
C) Stable
286- The different properties of metals
A) High melting
B) Hard and heavy nature
C) All of these
287- In case of metals, the hold of nucleus over outermost shell is ______.
A) Strong
B) Weak
C) More
288- The forces that hold atom in a compound are
A) Chemical bond
B) Covalent bond
C) Metallic bond
289-Addition of strong bonding forces relatively weak forces also exist between _____
A) Atom
B) Molecule
C) Bond
290- Chemical bond requires about ____ energy to break intermolecular forces.
A) High
B) Low
C) Both a and b
291-All intermolecular forces are collectively called
A) Chemical bonds
B) Van der waals
C) Henry brigs
292- Result from attraction the opposite charges may be.
A) Temporary
B) Permanent
C) Both a and b
293- The unequal sharing of electron b/w different types of atom makes one end of molecule and other
A) slightly positive
B) Slightly negative
C) Both a and b
294-when partial positive and partial negative exist in different position the adjacent molecules will
A) Arrange
B) Stable
C) De-arrange
295. The atoms which attracts the bond pair more strongly than it is called as
A) More electronegative
B) More electropositive
C) Less electronegative
296- hydrogen bonding is _______ of intermolecular forces.
A) Special type
B) Common type
C) Main type
297- Hydrogen bonding present in -------molecules.
A) Polar
B) All
C) Both a and b
298-Hydrogen bonding considered unique.
A) Hydrogen
B) Dipole-dipole attraction
C) Intermolecular forces
299- The covalent bond between hydrogen atom and other atom become polar enough to create _____ on hydrogen atom.
A) Partial positive
B) Partial negative
C) Partial permanent
300- Hydrogen bonding present in
a) In ice
B) In dimond
C) In graphite