Q. The pH of milk of magnesia is _______.
The correct answer was: 10.5
Q. When aluminum comes into contact with atmospheric O₂, it forms Al₂O₃. This is
The correct answer was: Corrosion
Q. Venus’s atmosphere is composed of thick white and yellow clouds of _______.
The correct answer was: H₂SO₄
Q. Bleaching powder represents _______.
The correct answer was: CaOCl₂
Q. The color of phenolphthalein in an acidic medium is
The correct answer was: Colorless
Q. Burning magnesium in air is a
The correct answer was: Chemical change
Q. A compound X reacts with CO₂ present in the air to form compound Y. Compound Y produces an oxide. Compound X is
The correct answer was: Ca(HCO₃)₂
Q. Barium can displace which element from its sulfate?
The correct answer was: Hydrogen
Q. The empty space in a packet of snacks is filled with an inert gas to prevent _______.
The correct answer was: Oxidation
Q. _______ acid is present in tomatoes.
The correct answer was: Tartaric
Q. _______ is an amphoteric oxide.
The correct answer was: Al₂O₃
Q. Which is the hardest allotrope of carbon in nature?
The correct answer was: Diamond
Q. When exposed to light, the color of a transparent photographic layer gradually changes due to _______.
The correct answer was: Oxidation reaction
Q. An aqueous solution of sodium chloride is called _______.
The correct answer was: Saline
Q. The metal that exists as a liquid at room temperature is _______.
The correct answer was: Mercury
Q. When blue CuSO₄ crystals are heated, a white anhydrous solid is obtained. The white solid is
The correct answer was: CuSO₄
Q. Recrystallization of sodium carbonate produces _______.
The correct answer was: Washing soda
Q. _______ is used as plaster to support fractured bones in the correct position.
The correct answer was: CaSO₄.½H₂O
Q. The decomposition of glucose is
The correct answer was: Exothermic reaction
Q. The formation of lime from marble by reacting with atmospheric moisture and CO₂ is an example of
The correct answer was: Decomposition reaction
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