Q. The number of electrons in the M shell of phosphorus is _______.
The correct answer was: 5
Q. Metallic oxides are called
The correct answer was: Basic Oxides
Q. Acetic acid reacts with _______ catalyst to form an ester with full ethanol.
The correct answer was: Alkali
Q. Zinc and lead are more reactive than _______.
The correct answer was: Copper
Q. Some substances whose smell changes from acidic medium to alkaline medium are called _______ indicators.
The correct answer was: Aromatic
Q. When heated strongly in limited air, ores are converted to oxides.
The correct answer was: Sulfides
Q. Passing carbon dioxide gas through lime water produces _______.
The correct answer was: CaCO₃
Q. 2NaOH(aq) + Zn(s) → X + H₂(g); X is
The correct answer was: Sodium Zincate
Q. Generally, _______ states are not included in a chemical reaction unless specifying is necessary.
The correct answer was: Physical
Q. The melting point of pure acetic acid is _______ and therefore, it often freezes in cold weather.
The correct answer was: 190 K
Q. What happens when sulfuric acid is mixed with zinc?
The correct answer was: H₂ gas and ZnSO₄ are formed
Q. White silver chloride in sunlight turns _______.
The correct answer was: Gray
Q. Cinnabar is an ore of _______.
The correct answer was: Mercury
Q. When a decomposition reaction is carried out by _______ it is called thermal decomposition.
The correct answer was: Heating
Q. When the litmus solution is neither acidic nor alkaline, its color turns _______.
The correct answer was: Purple
Q. When a metal reacts with _______, hydrogen gas is not produced.
The correct answer was: HNO₃
Q. When fats and oils are _______ they become rancid and their smell and taste change.
The correct answer was: Spoiled
Q. Copper does not react with _______.
The correct answer was: All of the above
Q. Precipitation reactions produce _______.
The correct answer was: Insoluble Salts
Q. Sodium hydroxide, which is an alkali, reacts to form an ester with alcohol and sodium salt of the carboxylic acid. This reaction is called _______.
The correct answer was: Saponification
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