Chemistry Practice Questions Set 14

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A metallic plate sticks firmly to the mouth of a water vessel made from another metal. By way of heating, one can detach the plate from the vessel. This is because heat expands
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1 point

the vessel only

both the vessel and the plate equally

the vessel more than the plate

the vessel and contracts the plate

DIRECTION: The following question consists of statements, Statement l and Statement ll. You are to examine these two statements carefully and select the answers to the question using the code given below :
Statement l: During indigestion, milk of magnesia is taken to get rid of pain in the stomach.
Statement ll: Milk of magnesia is a base and it neutralizes the excess acid in the stomach.
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1 point

Both the statements are individually true and Statement ll is the correct explanation of Statement l

Both the statements are individually true but Statement ll is not the correct explanation of Statement l

Statement l is true but Statement ll is false

Statement l is false but Statement ll is true

Which one among the following is an example of chemical change?
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1 point

The melting of an ice cube

The boiling of gasoline

The frying of an egg

The attraction of an iron nail to a magnet

When hard water is evaporated completely, the white solid remains in the container. It may be due to the presence of ___
1. Carbonates of Ca and Mg
2. Sulphates of Ca and Mg
3. Chlorides of Ca and Mg
Select the correct answer using the code given below:
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1 point

1 and 2 only

1, 2 and 3

3 only

1 and 3 only

In Tritium (T), the number of protons (P) and neutrons (N) respectively are *

1 point

1 P and 1 N

1 P and 2 N

1 P and 3 N

2 P and 1 N

Which one among the following compounds has the same equivalent weight and molecular weight?
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1 point

H₂SO₄

CaCl₂

Na₂SO₄

NaCl

Chromium oxide in paints makes the color of paint
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1 point

Green

White

Red

Blue

The form of carbon known as graphite
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1 point

is harder than diamond

contains a higher percentage of carbon than diamond

is a better electrical conductor than diamond

has equal carbon-to-carbon distances in all directions

When carbon dioxide is passed through lime water, the solution turns milky, but, on prolonged passage, the solution turns clear. This is because
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1 point

the calcium carbonate formed initially is converted to soluble calcium bicarbonate on passage of more carbon dioxide

the reaction is reversible and lime water is regenerated

the calcium bicarbonate formed initially is converted to soluble calcium carbonate on passage of more carbon dioxide

the initially formed insoluble compound is soluble in carbonic acid.

Which of the following is not correct about Baking Soda?
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1 point

It is used in soda acid fire extinguishers

It is added for faster cooking

It is a corrosive base

It neutralizes excess acid in the stomach

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