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प्रश्न
Write the expected formulas for the hydrides of 4th-period elements. What is the trend in the formulas? In what way the first two members of the series different from the others?
उत्तर
The expected formulas for the hydrides of 4th-period elements MH4 (electron precise). M2H6 (electron-deficient) and MH3 (electron-rich).
The trend in the formula is
- Electron precise hydrides – CH4, C2H6, SiH4, GeH4
- Electron deficient hydrides – B2H6
- Electron rich hydrides – NH3, H2O
The first two members of the series KH, CaH2 are ionic hydrides whereas the other members of the series CH4, C2H6, SiH4, B2H6, NH3 are covalent hydrides.
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संबंधित प्रश्न
Ionic hydrides are formed by ________.
Non-stoichiometric hydrides are formed by __________.
The hybridisation of oxygen atom is H2O and H2O2 are, respectively
Discuss the three types of Covalent hydrides.
Predict which of the following hydrides is a gas on a solid
- HCl
- NaH
Give your reason.
NH3 has an exceptionally high melting point and boiling point as compared to those of the hydrides of the remaining element of group 15 - Explain.
Why interstitial hydrides have a lower density than the parent metal?
How do you expect the metallic hydrides to be useful for hydrogen storage?
Which of the following hydrides are deficient in hydrogen?
