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Answered on 26 Feb CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

Which isotope of hydrogen is radioactive?

Kiran Gudigar

Tritium
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Answered on 24 Feb CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

Give an example of an ionic hydride and a covalent hydride:

Er Satya Narayan Yadav

Hard work And honesty is the best policy

In this, the hydrogen acts as the hydride H- (-ve) ionic hydride are usually binary compound s And are also insoluble in solution. Now example of ionic hydride sodium hydride (NaH), Lithium hydride (LiH), potassium hydride (KH), RbH, CsH, FrH
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Answered on 02 Mar CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

Which gas is evolved when Mg3N2 (Magnesium nitride) is treated with H2O? Give chemical reaction. read more
Which gas is evolved when Mg3N2 (Magnesium nitride) is treated with H2O? Give chemical reaction. read less

Chattarpal Singh

NH3
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Answered on 06/12/2018 CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

Which type of hydrides are generally non-stoichiometric in nature?

Kaushal Kumar

Chemistry Classes

Metallic hydride are generally non stoichiometric as low mobility of hydrogen.
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Answered on 02 Mar CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

Hydrogen peroxide is used as (a) an oxidizing agent (b) a reducing agent (c) a bleaching agent (d) all of the above read more
Hydrogen peroxide is used as
(a) an oxidizing agent
(b) a reducing agent
(c) a bleaching agent
(d) all of the above read less

Utpal Pradhan

chemistry tuitor

d. All of above
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Answered on 04/12/2018 CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

Shikha Singh

Math Magician

to fulfill the stability of 1s orbital 2 electrons must be there and for making hydrogen stable it forms molecule by combining with one more electron hence exist in diatomic form.
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Answered on 23 Feb CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

Discuss the consequences of high enthalpy of H-H bond, in terms of chemical reactivity of dihydrogen. read more
Discuss the consequences of high enthalpy of H-H bond, in terms of chemical reactivity of dihydrogen. read less

Rimmi S.

Chemistry wizard

Due to high H-H bond enthalpy, H2 molecule is highly stable at room temperature. In fact, Compounds like H2O, H2S, etc are formed at high temperature conditions. Atomic hydrogen can also be produced,but it requires very very high temperature (∼5000 K) or electric arc / ultraviolet radiations.
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Answered on 23 Feb CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

What do you understand by (i) Electron-deficient (ii) Electron-precise (iii) Electron-rich compounds... read more
What do you understand by (i) Electron-deficient (ii) Electron-precise (iii) Electron-rich compounds of hydrogen? Provide justification with suitable examples. read less

Rimmi S.

Chemistry wizard

Hydrogen forms molecular or covalent hydride (binary compound) when it reacts with p-block elements under certain conditions. For eg: H2O,H2S,NH3,CH4,B2H6,etc. On the basis of no. of electrons in Lewis structure, these covalent hydrides are further classified into: * Electron-deficient hydride : # less... read more

Hydrogen forms molecular or covalent hydride (binary compound) when it reacts with p-block elements under certain conditions. For eg: H2O,H2S,NH3,CH4,B2H6,etc.

On the basis of no. of electrons in Lewis structure, these covalent hydrides are further classified into:

* Electron-deficient hydride : 

# less than 8 number of electrons in Lewis structure. For eg: hydride of boron: BH3 ( 6 electrons ). Hydride of Boron actually exist as dimer in order to get stable.

#Group 13 elements form this kind of hydride.

* Electron precise hydride: 

#Their octet is exactly fulfilled by 8 electrons. For eg: CH4

# Group 14 elements form these hydrides.

* Electron rich hydride :

# Their octet is filled by 8 electrons and some lone pairs can be seen in Lewis structure of these hydrides. For eg: H2O, NH3, HF,etc.

#Group 15,16,17 elements form these hydrides.

 

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Answered on 24 Feb CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

Among NH3 H2O and HE, which would you expect to have highest magnitude of hydrogen bonding and why? read more
 Among NH3 H2O and HE, which would you expect to have highest magnitude of hydrogen bonding and why? read less

Shyam Narain Tiwari

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Answered on 30/10/2018 CBSE/Class 11/Science/Chemistry/Unit 9-Hydrogen CBSE/Class 11/Science/Chemistry

Deepak K.

Fluorine is most electronegative due to this HF is more polar than HCl. Therefore HF is associated with intermolecular H Bonding and liquid at room temperature.
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