Chemical Reacti...

Match the following with correct response.
(1) Reaction in which two substances combine to form new product
(2) substance split to form two or more simple substance
(3) More reactive metal displaces less reactive metal
(4) Loss or gain of electrons occurs

(A) Displacement reaction
(B) Combination Reaction
(C) Redox reaction
(D) Decomposition

Match the following with correct response.
(1) Reaction between sodium chloride and silver nitrate
(2) Reaction between copper and Iron sulphate
(3) Reaction between Barium chloride and sodium sulphate
(4) Reaction between aqueous solution of Potassium chloride and bromine 

(A) Potassium Bromide and chlorine gas
(B) Light green colour
(C) curdy white precipitate
(D) White precipitate

Match the following with correct response.
(1) Quick lime is added to water
(2) Formula for rust
(3) Silver tarnishing
(4) Pop sound

(A) Ca(OH)²
(B) H₂S gas
(C) Fe₂O₃.xH₂O
(D) H₂ gas

Match the following with correct response.
(1) Rancidity
(2) White washing
(3) Deposition of brown substance on iron nails
(4) Least reactive

(A) Calcium oxide mixed with water
(B) Gold
(C) Corrosion
(D) Oxygen

Which is correct about oxidation?
A. Gain of oxygen
B. Loss of hydrogen
C. Loss of electron
D. Gain of hydrogen

Fatty foods become rancid because of
A. Oxidation
B. Reduction
C. Reaction with Hydrogen
D. Reaction with oxygen

Which of the following statement is correct?
A. Electrolysis of water is an example of decomposition reaction
B. Nitrogen is used to prevent rancidity
C. Melting of ice is a physical change
D. Corrosion requires presence of both air and moisture

Reaction between water and quick lime gives rise to calcium hydroxide which of the following statement are correct?
A. The reaction is exothermic
B. The PH of final solution is less than 7
C. The reaction is endothermic
D. The PH of final solution is greater than 7

For the reaction, 3Fe + 4H₂O → Fe₂O₃ + 4H₂. Which of the following statement is correct?
A. Iron is oxidized
B. water is reduced
C. water act as reducing agent
D. Iron act as reducing agent