Detailed explanation with examples on types-of-chemical-reactions helps you to understand easily , designed as per NCERT.

By direct combination of Halogens and by reaction of Halogens with lower Interhalogen compounds. (i) Halogen molecules react directly to form interhalogen compound. Ex: Equal volumes of chlorine and fluorine combine at 473K to form chlorine monofluoride. (ii) A halogen molecule reacts with a lower interhalogen to form a new interhalogen compound.

2. In a certain change, color and the magnetic properties of a substance changed. What reaction might this be? (A) Chemical combination. (B) Photochemical reaction. (C) Irreversible reaction (D) Physical change 3. Oxygen is used in hospitals for? (A) Burning wastage (B) Artificial respiration (C) Fermentation (D) Decomposition Section - B 4.

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Detailed explanation with examples on types-of-chemical-reactions helps you to understand easily . QnA , Notes & Videos & sample exam papers

Detailed explanation with examples on oxidation-and-reduction helps you to understand easily . QnA , Notes & Videos & sample exam papers

Write the equation of the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid. OR The pH of a salt used to make tasty and crispy pakoras is 14. Identify the salt and write a chemical equation for its formation. List its two uses. 11.

Image by mirror is formed at 30 cm from mirror at its right and finally by the combination it is formed at 20 cm on right of the lens. So in air medium, magnification by lens is unity. In second medium µ = 7/6, focal length of lens 1 10 1 𝑓 = (1.5−1)(1 𝑅1 − 1 𝑅2) (1.5 7 6 −1)(1 𝑅1 − 1 𝑅2). =35 2 .

in combination with Na 3 AlF 6 and caF 2 is used as an electrolyte. The reaction at cathode: Al+3 + 3e- Al The reaction at anode: O2-+ C CO + 2e- 43. Ans. 1. H 2 O 2 acts as an oxidizing agent and reducing agent as well. In H2O2, ‘O’ is present in its intermediate oxidation state.

smaller resistance compared to B. So A is parallel combination because in parallel combination equivalent resistance is less than series combination. (d) i. I = 400 mA V= 12 V V= IR R=12 V/400 mA = 30 ohm ii. When current drops to 320 mA The music will stop playing when V= IR = 320 mA x 30 ohm =9.6 V (e) R = 20 ohm, I=2.5Amp