MCQOPTIONS
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MCQOPTIONS
This section includes 376 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
The nature of bonding in Halogens is |
| A. | Ionic bonds |
| B. | metallic bonds |
| C. | covalent bonds |
| D. | dative bonds |
| Answer» D. dative bonds | |
| 202. |
If water reacts with calcium oxide, it will produce |
| A. | calcium hydroxide |
| B. | calcium chloride |
| C. | calcium oxide |
| D. | calcium carbonate |
| Answer» B. calcium chloride | |
| 203. |
The single covalent bonds in carbon atoms are the |
| A. | sigma bond |
| B. | pi bond |
| C. | dative bond |
| D. | ionic bond |
| Answer» B. pi bond | |
| 204. |
HClO is known as |
| A. | chloric acid |
| B. | Chlorine |
| C. | bacteria killer |
| D. | water |
| Answer» B. Chlorine | |
| 205. |
The element in Period 3 with the lowest electronegativity is |
| A. | Na |
| B. | Al |
| C. | P |
| D. | S |
| Answer» B. Al | |
| 206. |
Hexanediol dichloride,ClOC(CH₂)₄COCl is more |
| A. | reactive only |
| B. | expensive only |
| C. | stable |
| D. | reactive and expensive |
| Answer» E. | |
| 207. |
Polymers whose monomers are bonded to each other by ester link are called |
| A. | amides |
| B. | peptides |
| C. | polyamides |
| D. | polyesters |
| Answer» E. | |
| 208. |
The halogens reacts with non-metals forming |
| A. | ionic bond |
| B. | covalent bond |
| C. | coordinate bond |
| D. | dative bond |
| Answer» C. coordinate bond | |
| 209. |
In a comparison with S-block elements, the melting point of transition elements are |
| A. | higher |
| B. | lower |
| C. | same |
| D. | constant |
| Answer» B. lower | |
| 210. |
Ketones are formed by the oxidation of |
| A. | primary alcohols |
| B. | secondary alcohol |
| C. | tertiary alcohol |
| D. | amines |
| Answer» C. tertiary alcohol | |
| 211. |
The element Silicon (Si) in Group IV is a |
| A. | metal |
| B. | non-metal |
| C. | metalloid |
| D. | transition metal |
| Answer» D. transition metal | |
| 212. |
Hot magnesium reacts with water to yield |
| A. | magnesium oxide only |
| B. | hydrogen only |
| C. | oxygen |
| D. | magnesium oxide and hydrogen |
| Answer» E. | |
| 213. |
The larger the molecules the stronger is the |
| A. | Van der Waal's forces |
| B. | covalent bond |
| C. | ionic bond |
| D. | co-ordinate bond |
| Answer» B. covalent bond | |
| 214. |
Metalloids have electrical conductivity in |
| A. | small amount |
| B. | large amount |
| C. | medium |
| D. | stable |
| Answer» B. large amount | |
| 215. |
The melting point of Magnesium Oxide is higher than |
| A. | 2010 °C |
| B. | 2800 °C |
| C. | 2000 °C |
| D. | 2011 °C |
| Answer» C. 2000 °C | |
| 216. |
To verify halide test ammonia is added which gives off ions with |
| A. | silver chloride ions only |
| B. | silver bromide ions only |
| C. | silver fluoride |
| D. | silver chloride and silver bromide ions |
| Answer» E. | |
| 217. |
A more reactive halogen can displace a less reactive halogen from a halide solution of the less reactive |
| A. | halogen |
| B. | noble gas |
| C. | Group-I metal |
| D. | Group-II metal |
| Answer» B. noble gas | |
| 218. |
The most volatile element is |
| A. | iodine (I) |
| B. | fluorine (F) |
| C. | bromine (Br) |
| D. | chlorine (Cl) |
| Answer» C. bromine (Br) | |
| 219. |
The bonding pairs of electrons in each carbon atom |
| A. | repel |
| B. | attract |
| C. | remain intact |
| D. | centrifuge |
| Answer» B. attract | |
| 220. |
The electrical conductivity of metalloids can be raised by an increase in |
| A. | pressure |
| B. | volume |
| C. | concentration |
| D. | temperature |
| Answer» E. | |
| 221. |
CH₃CH₂CH₂CH₂CHO is formula for |
| A. | methanol |
| B. | propanal |
| C. | butanal |
| D. | pentanal |
| Answer» E. | |
| 222. |
Ions which are greater than their original atoms are |
| A. | negatively charged |
| B. | positively charged |
| C. | neutral |
| D. | dual charged |
| Answer» B. positively charged | |
| 223. |
Halogens are the elements of |
| A. | Group-II |
| B. | Group-VII |
| C. | Group-III |
| D. | Group-IV |
| Answer» C. Group-III | |
| 224. |
HCN undergoes Nucleophilic addition reaction to give a product of |
| A. | hydrogen cyanide |
| B. | hydroxynitrile |
| C. | hydroxyl amine |
| D. | none of above |
| Answer» C. hydroxyl amine | |
| 225. |
With increasing atomic number of Halogens, the |
| A. | Van der Waals forces decrease |
| B. | melting point increases |
| C. | atomic radii decreases |
| D. | color becomes lighter |
| Answer» C. atomic radii decreases | |
| 226. |
CFCs are not dangerous on earth, the problem starts when they start diffusing in |
| A. | stratosphere |
| B. | atmosphere |
| C. | clouds |
| D. | moon |
| Answer» B. atmosphere | |
| 227. |
Group-VII elements are |
| A. | alkaline earth metals |
| B. | transition metals |
| C. | coinage metals |
| D. | metalloids |
| Answer» C. coinage metals | |
| 228. |
Manufacture of polyesters involves reaction of |
| A. | dicarboxylic only |
| B. | diols only |
| C. | diamines |
| D. | dicarboxylic and diols |
| Answer» E. | |
| 229. |
Diamond form of Carbon does not conduct electricity due to the absence of |
| A. | spectators electrons |
| B. | delocalized electrons |
| C. | free electrons |
| D. | ions |
| Answer» C. free electrons | |
| 230. |
Tetrachloride (-Cl₄) that has highest boiling point is |
| A. | SiCl₄ |
| B. | CCl₄ |
| C. | SnCl₄ |
| D. | PbCl₄ |
| Answer» D. PbCl₄ | |
| 231. |
Slaked lime is used |
| A. | in making of cement |
| B. | in making of fertilizers |
| C. | by farmers to increase the acidic soil's pH |
| D. | by farmers to reduce the alkaline soil's pH |
| Answer» D. by farmers to reduce the alkaline soil's pH | |
| 232. |
Transition elements are |
| A. | cobalt |
| B. | zinc |
| C. | scandium |
| D. | chlorine |
| Answer» B. zinc | |
| 233. |
White solid oxides are produced by burning of group II metals in the presence of |
| A. | nitrogen |
| B. | carbon dioxide |
| C. | oxygen |
| D. | helium |
| Answer» D. helium | |
| 234. |
The atomic number of Barium is |
| A. | 38 |
| B. | 20 |
| C. | 12 |
| D. | 56 |
| Answer» E. | |
| 235. |
Climbing ropes are made from |
| A. | plastic |
| B. | wood |
| C. | rubber |
| D. | nylon |
| Answer» E. | |
| 236. |
The temperature at which thermal decomposition of metal carbonates of Group II takes place |
| A. | increases along the Period 2 |
| B. | increases down the group |
| C. | decreases down the group |
| D. | remains constant across the Group II metals |
| Answer» C. decreases down the group | |
| 237. |
The strength and high melting point of ceramics is due to their |
| A. | density |
| B. | malleability |
| C. | giant molecular structure |
| D. | ductility |
| Answer» D. ductility | |
| 238. |
The element Germanium in Group IV is a |
| A. | metal |
| B. | non-metal |
| C. | metalloid |
| D. | transition metal |
| Answer» D. transition metal | |
| 239. |
Halogen that is most volatile is |
| A. | F₂ |
| B. | Cl₂ |
| C. | Br₂ |
| D. | I₂ |
| Answer» B. Cl₂ | |
| 240. |
Carbonyl compounds are |
| A. | aldehydes only |
| B. | ketones only |
| C. | alcohols |
| D. | aldehydes and ketones |
| Answer» E. | |
| 241. |
Halogen alkanes are naturally found and are |
| A. | abundant |
| B. | rare |
| C. | profound |
| D. | plenty |
| Answer» C. profound | |
| 242. |
The mixture which contains equal amount of sodium chloride (NaCl) and sodium chlorate (NaClO₃) gives off |
| A. | bleach |
| B. | aerosols |
| C. | solvents |
| D. | refrigerants |
| Answer» B. aerosols | |
| 243. |
C₆H₅OH is a |
| A. | alcohol |
| B. | methanol |
| C. | phenol |
| D. | ethanol |
| Answer» D. ethanol | |
| 244. |
Teflon is the trade name for |
| A. | non-stick pan |
| B. | ice-skates |
| C. | wheelers |
| D. | glass bowl |
| Answer» B. ice-skates | |
| 245. |
Fluorine is more oxidizing in nature than |
| A. | iodine |
| B. | fluorine |
| C. | chlorine |
| D. | bromine |
| Answer» B. fluorine | |
| 246. |
Fluorine can be stored in a metal lined with nickel and copper alloy to protect from |
| A. | further reaction |
| B. | outside |
| C. | water |
| D. | none of above |
| Answer» B. outside | |
| 247. |
After Barium (Ba), metal that has highest density is |
| A. | Ca |
| B. | Sr |
| C. | Be |
| D. | Mg |
| Answer» C. Be | |
| 248. |
The metal among the four with the highest density is |
| A. | Be |
| B. | Ca |
| C. | Sr |
| D. | Mg |
| Answer» D. Mg | |
| 249. |
Physical properties are individual and not result of constituting elements in |
| A. | metals |
| B. | non-metals |
| C. | mixtures |
| D. | compounds |
| Answer» E. | |
| 250. |
Most common element in air is |
| A. | hydrogen |
| B. | nitrogen |
| C. | oxygen |
| D. | carbon |
| Answer» C. oxygen | |