Question with Answer Olmpiad NSO

Q1. Ethene is produced when :

1. Ethanol reacts with ethanoic acid in presence of few drops of conc. H2SO4
2. Ethanol is oxidized with acidified potassium dichromate
3. Ethanol is heated with excess of conc. H2SO4 at 443 K
4. Ethanol reacts with sodium metal

Answer: C

Q2. Rasika mixed sugarcane juice with yeast and kept in covered and sealed pot for a few days. After opening the pot she noticed that the juice started giving a strong smell. She filtered the juice and filled it in bottles. What is the name of the process and what is the product formed ?

1. Fermentation, Ethyl alcohol
2. Decomposition, Glucose
3. Esterification, Fructose
4. Fermentation, Acetic acid

Answer: A

Q3. The portion left after removing a hydrogen atom from an alkane is called :

1. Functional group
2. Alkenyl group
3. Alkyl group
4. Phenyl group

Answer: B

Q4. The compound which gives brisk effervescene with sodium metal but not with sodium hydrogen carbonate is :

1. Ethanol
2. Ethanoic acid
3. Both (a) & (b)
4. None of these

Answer: A

Q5. Mark the wrong statement among the following.

1. People sleeping in closed room with coal fire burning inside have died due to CO 2 poisoning.
2. Flame is only produced when gaseous substances burn.
3. Fullerenes are allotropes of carbon.
4. Intake of methyl alcohol can cause death.

Answer: A

Q7. Identify X and Y respectively.

1. NO 2 , CO 2
2. CO, H 2
3. SO 2 , CO 2
4. CO 2 , H 2

Answer: B

Q8. Identify the mixture Z.

1. Producer gas
2. Water gas
3. Coal gas
4. Soda water

Answer: B

Q10. Which of the following general formulae represents the alkyl group ?

1. C n H 2n
2. C n H 2n+1
3. C n H 2n+2
4. C n H 2n-1

Answer: B