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UPSC CAPF AC Paper - I
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Which one of the following is the correct electronic configuration of chlorine?

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Important Questions on Chemistry

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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 43
The bond which is present between water molecules is-
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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 44
What happens when a chemical bond is formed?
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UPSC CAPF AC Paper - I
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Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 45

Consider the following statements with respect to chemical bonding.

I. It is an attractive force.

II. It holds the atom and ions in the molecules.

III. Bonding occurs between the two atoms because of the distribution of electrons in the shell or orbits.

Which of the above statements is/are correct?

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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 46

Which of the following statements regarding oxidation and reduction are correct?

I. In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place.

II. In oxidation, gain of electron takes place whereas in reduction, loss of electron takes place.

III. Oxidising agent decreases the oxidation number but reducing agent increases the oxidation number.

IV. Oxidising agent increases the oxidation number but reducing agent reduces the oxidation number.

Select the correct answer using the codes given below:

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UPSC CAPF AC Paper - I
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Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 47
The process by which milk is converted to curd is called _____.
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UPSC CAPF AC Paper - I
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Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 48
In KMnO4 molecule, the oxidation states of the elements potassium (K), manganese (Mn) and oxygen are, respectively:
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UPSC CAPF AC Paper - I
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Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 49

Match the following Columns.

Column I (Elements) Column II (Valency)
A. Argon 1. 4
B. Carbon 2. 1
C. Phosphorus 3. 0
D. Chlorine 4. 3

Codes:

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UPSC CAPF AC Paper - I
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Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 50
Which among the following is a covalent compound?