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Which of the following statements about carboxylic acids is/are correct?

1. Simple aliphatic carboxylic acids are soluble in water.

2. Higher carboxylic acids are practically insoluble in water.

3. The acidity of a carboxylic acid depends on the number of carbon atoms present in the hydrocarbon chain.

Select the correct answer using the codes given below.

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Important Questions on General Science

EASY
Defence
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CAPF Assistant Commandants>Chapter 3 - General Science>CHEMISTRY>Q 123
Azurite is an ore of _____.
EASY
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CAPF Assistant Commandants>Chapter 3 - General Science>CHEMISTRY>Q 125

Match List-I (Ore) with List-II (Metal) and select the correct answer using the codes given below.

List-I (Ore) List-II (Metal)
A. Magnetite 1. Lead
B. Galena 2. Zinc
C. Bauxite 3. Iron
D. Sphalerite 4. Aluminium
MEDIUM
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CAPF Assistant Commandants>Chapter 3 - General Science>CHEMISTRY>Q 126
Which one of the following does not contain copper as a constituent?
MEDIUM
Defence
IMPORTANT
CAPF Assistant Commandants>Chapter 3 - General Science>CHEMISTRY>Q 127
A metal element and a non-metal element which are obtained in large quantities from sea-water are, respectively?
EASY
Defence
IMPORTANT
CAPF Assistant Commandants>Chapter 3 - General Science>CHEMISTRY>Q 128
Which one of the following metal is found in ‘Plaster of Paris'?
EASY
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CAPF Assistant Commandants>Chapter 3 - General Science>CHEMISTRY>Q 129
Which one of the following is a compound?
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IMPORTANT
CAPF Assistant Commandants>Chapter 3 - General Science>CHEMISTRY>Q 130

Following question consist of two statements.

Read statement-I and statement-II carefully and select the answer to using the codes given below.

Statement-I: Crooke's glass for spectacles contain rare earth metal oxides of praseodymium and neodymium.

Statement-II: Crooke's glass is characterized by its ability to absorb ultraviolet light and to transmit visible light completely.

EASY
Defence
IMPORTANT
CAPF Assistant Commandants>Chapter 3 - General Science>CHEMISTRY>Q 131
Which one among the following is not a form of carbon?