Chemistry Class 10th

201. Alkynes can be prepared using:

A) Reduction

B) Elimination

C) Addition

D) None of the above

202. Dihalides attached to adjacent carbon atoms are called:

A) Halide Group

B) Vicinal Dihalide

C) Prostatic Group

D) Inhibitor Group

203. Tetrahalides are compounds having _________ halogens

A) 2

B) 4

C) 5

D) None

204. The first three alkynes are ______.

A) Gases

B) Liquids

C) Solids

D) Volatile Liquid

205. Alkynes are non polar:

A) True

B) False

206. Combustion of Alkynes produce:

A) CO2

B) Water

C) Heat

D) All of the above

207. The Melting and Boiling points of Alkynes increases as we go up the chart.

A) True

B) False

208. Which of the following is a substitution reaction:

A) Halogenation of Alkynes

B Halogenation of  Alkenes

C) Halogenation of Alkanes

D) Oxidation of Alkenes

209. Halogenation of methane in the presence of diffused sunlight occurs:

A) Quickly, Only in one step

B) Slowing in one step

C) In series of four steps

D) Quickly in two steps

210. Which of the following decolourizes Br2 Water

A) Ethane

B) Ethene

C) Propane

D) Methane

211. Dehydration of Ethyl Alcohol with conc H2SO4 results in the formation of:

A) Ethane

B) Methane

C) Ethyne

D) Ethene

212. Substitution reaction is the characteristic of:

A) Alkynes

B) Alkenes

C) Alkanes

D) None of the above

213. Which of the following is the least reactive:

A) Ethyne

B) Propene

C) Ethene


214. The chemical analysis of Protoplasm shows that there are _______ types of compounds:

A) 2

B) 3

C) 5

D) None

215. Organic compounds consist of the following, except which of the following:

A) Carbohydrates

B) Mineral

C) Proteins

D) None of the above

216. Starch is a type of:

A) Protein

B) Carbohydrate

C) Lipid

D) Mineral

217. The ratio of Carbon, hydrogen and Oxygen in the Carbohydrates is:

A) 1:1:2

B) 2:1:2

C) 1:2:1

D) 2:2:2

218. _______ are macromolecules of poly hydroxyl Aldehydes and Ketones.

A) Carbohydrates

B) Proteins

C) Lipids

D) None of the above

219. _________ are usually referred as Saccharide:

A) Carbohydrates

B) Proteins

C) Lipids

D) None of the above

220. Saccharide means _________:

A) Salty

B) Roughage

C) Sweet

D) Bitter