Salts of which of the following elements provide colours to fireworks?
Important Questions on Chemistry
Consider the following statements
1. Liquefied Natural Gas (LNG) is liquefied under extremely cold temperatures and high pressure to facilitate storage or transportation in specially designed vessels.
2. First LNG terminal in India was built in Hassan.
3. Natural Gas Liquids (NGL) are separated from LPG and these include ethane, propane, butane and natural gasoline.
Which of the statements given above is/are correct?
Assertion (A): The main constituent of the liquefied petroleum gas is methane.
Reason (R): Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.
Codes:
A B C D
Which of the following substances are found in the beach sands of many parts of Kerala?
1. Ilmenite 2. Zircon
3. Sillimanite 4. Tungsten
Select the correct answer using the codes given below
1. Benzene
3. Sodium carbonate
2. Carbon tetrachloride
4. Trichloroethylene
Which of the above is/are used as dry cleaning chemical?
Consider the following statements
1. Caffeine, a constituent of tea and coffee is a diuretic.
2. Citric acid is used in soft drinks.
3. Ascorbic acid is essential for formation of bones and teeth.
4. Citric acid is a good substitution of ascorbic acid in our nutrition.
Which of the statements given above are correct?
Assertion (A): Cellulose is used in making shatter proof glass.
Reason (R): Polysaccharides are not soluble in water.
Codes:
