Question

nyarogen chionde
3.Write down the physical states of reactants and products in following reactions.
a. SO, + 2H S → 35 + 2H20
b. 2Ag + 2HCI
2AgCl + H
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Answer 1

Answer:

नाइट्रोजन (Nitrogen), भूयाति या नत्रजन एक रासायनिक तत्व है जिसका प्रतीक N है। इसका परमाणु क्रमांक 7 है। सामान्य ताप और दाब पर यह गैस है तथा पृथ्वी के वायुमण्डल का लगभग 78% नाइट्रोजन ही है। यह सर्वाधिक मात्रा में तत्व के रूप में उपलब्ध पदार्थ भी है।

Answer 2

Answer:

When zinc metal is submerged into a quantity of aqueous HCl, the following reaction occurs (Figure 5.4 "Zinc Metal plus Hydrochloric Acid"):

Zn(s) + 2HCl(aq) → H2(g) + ZnCl2(aq)

This is one example of what is sometimes called a single replacement reaction because Zn replaces H in combination with Cl.

Because some of the substances in this reaction are aqueous, we can separate them into ions:

Zn(s) + 2H+(aq) + 2Cl−(aq) → H2(g) + Zn2+(aq) + 2Cl−(aq)

Viewed this way, the net reaction seems to be a charge transfer between zinc and hydrogen atoms. (There is no net change experienced by the chloride ion.) In fact, electrons are being transferred from the zinc atoms to the hydrogen atoms (which ultimately make a molecule of diatomic hydrogen), changing the charges on both elements.

To understand electron-transfer reactions like the one between zinc metal and hydrogen ions, chemists separate them into two parts: one part focuses on the loss of electrons, and one part focuses on the gain of electrons. The loss of electrons is called oxidation. The gain of electrons is called reduction. Because any loss of electrons by one substance must be accompanied by a gain in electrons by something else, oxidation and reduction always occur together. As such, electron-transfer reactions are also called oxidation-reduction reactions, or simply redox reactions. The atom that loses electrons is oxidized, and the atom that gains electrons is reduced. Also, because we can think of the species being oxidized as causing the reduction, the species being oxidized is called the reducing agent, and the species being reduced is called the oxidizing agent.