CHEM BRAIN

Which of the following conduct electricity in the fused state [Roorkee 2000] 

Which of the following hydrides are ionic [Roorkee 1999] 

Electrolytes are compound containing [MADT Bihar 1981] 

Which of the following statements is not true for ionic compounds [RPET 2003]

Which of the following has highest melting point [RPET 2003] 

The energy that opposes dissolution of a solvent is [CPMT 2002]

Which of the following pairs of species has same electronic configuration [UPSEAT 2002] 

Which of the following compounds is ionic [UPSEAT 2002] 

The interionic attraction depends on interaction of [Kerala CET (Med.) 2002] 

Which one is the strongest bond [Pb. PMT 2001]

Atoms or group of atoms which are electrically charged are known 

Bond formed in crystal by anion and cation is [CBSE PMT 2000] 

An atom with atomic number 20 is most likely to combine chemically with the atom whose atomic number is [BHU 2000]

Which type of bonding exists in Li₂O and CaF₂ respectively [RPET 2000] 

Which of the following is least ionic [MP PET 2002] 

Two element have electronegativity of 1.2 and 3.0. Bond formed between them would be [CPMT 1982; DCE 2000] 

An element X with the electronic configuration 1s² , 2s² , 2p⁶ , 3s² would be expected to form the chloride with the formula 

What is the effect of more electronegative atom on the strength of ionic bond [AMU 1999] 

Highest melting point would be of [RPMT 1999] 

Ionic compounds do not have [RPMT 1997]

Electrovalent compounds are [CPMT 1996] 

The main reaction during electrovalent bond formation is 

The force which holds atoms together in an electrovalent bond is 

Out of the following, which compound will have electrovalent bonding

The high melting point and insolubility in organic solvents of sulphanilic acid are due to its ...... structure. [IIT 1994] 

Which of the following halides has maximum melting point 

Which of the following is least soluble [CPMT 1989] 

Among the bonds formed by a chlorine atom with atoms of hydrogen, chlorine, sodium, and carbon, the strongest bond is formed between [EAMCET 1988; MP PMT 1993]

The chemical formula for calcium pyrophosphate is . Ca₂P₂O₇ The formula for ferric pyrophosphate will be [NCERT 1977]

What metals combine with non-metals, the metal atom tends to 

An ionic compound is generally a [MADT Bihar 1981]

Which of the following compound has electrovalent linkage [CPMT 1983, 84, 93] 

Which one of the following compound is ionic [MNR 1985] 

What is the nature of chemical bonding between Cs and F [MP PMT 1987; CPMT 1976] 

A number of ionic compounds e.g. AgCl, CaF₂ , BaSO₄ are insoluble in water. This is because [NCERT 1984] 

The phosphate of a metal has the formula. MHPO₄ The formula of its chloride would be [NCERT 1974; CPMT 1977] 

Molten sodium chloride conducts electricity due to the presence of

Ionic bonds are usually formed by combination of elements with [CBSE PMT 1991]

The sulphate of a metal has the formula  M₂ ( SO₄ )₃ . The formula for its phosphate will be [DPMT 1982; CPMT 1972; MP PMT 1995]

Favourable conditions for electrovalency are

Solid NaCl is a bad conductor of electricity since [AFMC 1980] 

When NaCl is dissolved in water the sodium ion becomes [NCERT 1974; CPMT 1989; MP PMT 1999]

Sodium chloride easily dissolves in water. This is because [NCERT 1972; BHU 1973] 

The molecular formula of chloride of a metal M is . MCl₃ The formula of its carbonate would be [CPMT 1987]

In the transition of Zn atoms to  Zn⁺⁺ ions there is a decrease in the [CPMT 1972]

Phosphate of a metal M has the formula M₃ ( PO₄ )₂ The formula for its sulphate would be  [CPMT 1973; MP PMT 1996]

The phosphate of a metal has the formula MPO4 . The formula of its nitrate will be [CPMT 1971; MP PMT 1996]

The chloride of metal is MCl₂. The formula of its phosphate will be 

The electronic structure of four elements A, B, C, D are 

Many ionic crystals dissolve in water because [NCERT 1982] 

Electrovalent compounds do not have [CPMT 1991] 

Which of the following is an electrovalent linkage [CPMT 1974; DPMT 1984, 91; AFMC 1988]

In the formation of NaCl from Na and Cl [CPMT 1985] 

Element x is strongly electropositive and y is strongly electronegative. Both element are univalent, the compounds formed from their combination will be [IIT 1980] 

In the given bonds which one is most ionic [EAMCET 1980] 

Lattice energy of an ionic compound depends upon [AIEEE 2005] 

Which type of compounds show high melting and boiling points

From the following which group of elements easily forms cation

Formula of a metallic oxide is MO. The formula of its phosphate will be [CPMT 1986, 93] 

An atom of sodium loses one electron and chlorine atom accepts one electron. This result the formation of sodium chloride molecule. This type of molecule will be [MP PMT 1987] 

In the following which substance will have highest boiling point [NCERT 1973]

Electrovalent bond formation depends on

A electrovalent compound is made up of [CPMT 1978, 81; MNR 1979] 

Electrovalent compound's [MP PMT 1984]

The electronic configuration of four elements L, P, Q and R are given in brackets 

L (1s²  , 2s² 2p⁴ ) ;  Q ( 1s²  , 2s² 2p⁶ , 3s² 3p⁵ )

P ( 1s²  , 2s² 2p⁶ , 3s¹ ) ;  R ( 1s²  , 2s² 2p⁶ , 3s² )

The formulae of ionic compounds that can be formed between these elements are [NCERT 1983]

Which one is least ionic in the following compounds [CPMT 1976; BHU 1998]

When sodium and chlorine reacts then [NCERT 1973]

Which forms a crystal of NaCl [CPMT 1972; NCERT 1976; DPMT 1996]

In covalency [CPMT 1974, 76, 78, 81; AFMC 1982]

The valency of sulphur in sulphuric acid is [NCERT 1974]