MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Earn 100

Consider the following statements.

I. Phosphorus occurs as free element on earth.

II. Vast majority of phosphorus compounds are consumed as fertilisers.

III. Phosphorus is used in safety matches.

Which of the above statements are correct?

50% studentsanswered this correctly

Important Questions on Chemistry

MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 213
Sulphur dioxide bleaches colouring matter by:
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 214

Consider the following statements.

I. Sulphur occurs as free element in nature.

II. Sulphur in the form of sulphides is present in many types of meteorites.

III. Sulphur is used to produce sulphuric acid.

IV. Sulphur is used as fungicide and pesticide.

Which of the above statements are correct?

HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 215

Match the following Columns.

Column I Column II
A. Diamond 1. Calcium
B. Marble 2. Silicon
C. Sand 3. Aluminium
D. Ruby 4. Carbon

Codes:

MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 216
In deep-sea diving, divers use a mixture of gases consisting of oxygen and:
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 217

Statement I: Liquid hydrogen fluoride used as non-aqueous solvent, is corrosive, etches glass and also causes painful skin wounds.

Statement II: Hydrogen fluoride reacts with silica and dehydrates tissue as well as acidic action of HF on tissue give rise to painful wounds.

EASY
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 218
Which of the following are the two main constituents of granite?
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 219

Statement I: Bleaching action of SO2 is temporary and by reduction.

Statement II: The colour of material is regained due to oxidation by air.

MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 220
A group of students in a school laboratory burnt a magnesium ribbon during an experiment. They observed that magnesium burns to form magnesium oxide and produces heat and light. This experiment is an example of: