Question : Choose the incorrect statement about organic compounds. 

Option 1: They have low melting and boiling points

Option 2: They do not dissolve in water

Option 3: They are not easily combustible

Option 4: They contain mainly carbon and hydrogen

Question : Statement 1: Feedback control focuses on preventing potential problems.

Statement 2: Feedback control is a proactive technique.

Option 1: Both correct.

Option 2: Both incorrect.

Option 3: Statement 1 correct, Statement 2 incorrect.

Option 4: Statement 2 incorrect, Statement 1 correct.

Question : Vegetables are cooked in less time by adding a pinch of salt while cooking because:

Option 1: boiling point of water increases

Option 2: latent heat of vaporisation of water decreases

Option 3: latent heat of vaporisation of water increases

Option 4: boiling point of water decreases

Question : Water is not suitable as a calorimetric substance because it:

Option 1: has high specific heat

Option 2: is a good conductor

Option 3: has high boiling water

Option 4: low latent heat of vapourisation

Question : Contraceptive pills in the market contain:

Option 1: inorganic compounds

Option 2: herbicides

Option 3: antibiotics

Option 4: steroid hormones

Question : The highest volume of gases in the lower atmosphere is comprised of

Option 1: Hydrogen

Option 2: Carbon dioxide

Option 3: Oxygen

Option 4: Nitrogen