lead acid gel battery

Anode - Lead Cathode - PbO 2 The electrodes are arranged alternately, separated by thin wooden or fibre glass sheet. Electrolyte - dilute H 2 SO 4 . Electrode reaction (during discharging) ..

A battery hydrometer is shown in figure below. It is used for measuring the relative density of accumulator acid. It is kept inside a glass tube fitted with a rubber bulb at the upper end. The lower end of the glass tube is connected with a narrow tube which is made of aci..

Using concentrated nitric acid: Pure concentrated nitric acid makes iron passive due to the formation of a protective layer of FeO.Fe 2 O 3 on the metal surface, which prevents further actio..

Lead nitrate is prepared by dissolving lead, or its oxide or carbonate salt in dilute nitric acid. Lead nitrate is a colorless crystalline solid, soluble in water. It decrepitates when heated and decomposes as follows:..

Leading Strand - The enzyme forms one new strand in a continuous stretch in the 5'-3' direction and is called leading strand. On the other parent strand, the enzyme forms short stretches of DNA once again in the 5'-3' direction starting from an RNA primer. These short DNA fragme..

All acids contain hydrogen. When metals react with acids the metals displace hydrogen from the acid and take its place, forming the respective salts. Metals like potassium, calcium, sodium and magnesium are not used, as they react violently, leading to an exp..

(i) Take lead nitrate crystals in a beaker and dissolve it in distilled water. (ii) Keep adding small amounts of dilute hydrochloric acid slowly, with stirring. (iii) A white precipitate is obtained. Filter and wash the precipitate with distilled water. (vi) Collect the filtere..

The oxides of nitrogen and sulphur are corrosive and poisonous. When in excess in the atmosphere, these gases react with water (e.g., rain water) to form acids, and thus result into acid rain. Acid rain has the following harmful effects: It damages the nutrition leve..

Normally while rain travels through the air, it dissolves floating chemicals and washes down particles that are suspended in air. At the start of its journey raindrops are neutral (pH = 7). In clean air, rain picks up materials that occur naturally such as dust, pollen, some CO 2 and other chemical..

For checking the presence of the hydrochloric acid, the following tests could be conducted: 1) It turns blue litmus paper red. 2) When silver nitrate solution is added to hydrochloric acid, it gives white precipitate of silver chloride. 3) The addition of lead nitrate ..