Read the following statements carefully and select the option that correctly identifies the true (T) and false (F) statements.

P: Metals upon reacting with oxygen produce metal oxides.
Q: All metals react with cold water.
R: Metals produce oxygen when they react with acid as well as base.
S: Gold upon reacting with bases produces hydrogen gas and metal salt.

P: True; Q: True;
R: True; S: False

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P: True; Q: False;
R: False; S: False

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P: False; Q: True;
R: True; S: True

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P: True; Q: True;
R: True; S: False

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Solution

The correct option is D P: True; Q: True;
R: True; S: False

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Question 24.
Which of the following statements is not correct ?

(a) All metal carbonates react with acid to give a salt, water and carbon dioxide
(b) All metal oxides react with water to give salt and acid
(c) Some metals react with acids to give salt and hydrogen
(d) Some non-metal oxides react with water to form an acid

Q. Read the statements and select the option that correctly identifies them as true (T)/false (F).
1. Gold and silver do not react with water.
2. Metals produce oxygen when they react with acid as well as base.
3. Phosphorus readily reacts with oxygen to give phosphorus pentoxide, which turns moist blue litmus red.
4. Metal oxides are basic in nature.

Q. Read the following statements carefully and select the option which correctly identifies the true (T) and false (F) statements.

(i) Potassium and magnesium react vigorously with cold water.

(ii) Gold, silver and platinum are noble metals.

(iii) Most metals liberate hydrogen gas on reacting with acids.

Q. Metals react with oxygen to produce __________ oxides, and non-metals react with oxygen to produce __________ oxides.

Q. Not all metals react with bases to produce salt and hydrogen gas.

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The correct option is D P: True; Q: True; R: True; S: False

The correct option is D P: True; Q: True;
R: True; S: False