EASY
UPSC CAPF AC Paper - I
IMPORTANT
Earn 100

Study the following statements
1. Sodium hydrogen carbonate or baking soda is used in soda acid fire extinguishers.
2. Washing soda or sodium carbonate is used in glass, soap, and paper industries.
3. Sodium carbonate is used for removing the permanent hardness of the water.
Which of the statements given above are correct?

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Important Questions on Chemistry

EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 15>Q 80

Consider the following statements
1. Rubber is a polymer of isoprene.
2. Rubber from the latex is separated by a process, known as coagulation.
3. By increasing the amount of sulphur, the rubber can be hardened.
Which of the statements given above are correct about rubber?

EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 15>Q 81
Match List I with List II and select the correct answer using the codes given below the lists.
List I                           List II
A. Cellulose acetate  1. First plastic of pyroxilin industrial use
B. Sodium salts         2. Hard soaps
C. Potassium salts    3. Soft soaps
D Amorphous solid    4. Amber
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 15>Q 82
In cold countries, ethylene glycol is added to the water in the radiators of the cars during winter to?
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 15>Q 83
Consider the following statements regarding aluminium paint
1. It is fairly good heat-resistant.
2. It possesses good electrical resistance.
3. It can not be used for hot water pipe.
Which of the statement(s) given above is/are correct?
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 15>Q 84
Which one of the following has the highest fuel value?
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 15>Q 85
An ideal fuel should have
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 15>Q 86
Consider the following statements:
1. Fuels with low octane numbers are ideal for diesel engines.
2. Use of gasoline with low octane numbers may lead to the problem of engine knocking.
Which of the statement(s) given above is/are correct?
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 15>Q 87
Graphene is frequently in news recently. What is its importance?
1. It is a two-dimensional material and has good electrical conductivity.
2. It is one of the thinnest, but strongest materials tested so far.
3. It is entirely made of silicon and has high optical transparency.
4. It can be used as 'conducting electrodes' required for touch screens, LCDs, and organic LEDs.
Which of the statements given above are correct?