Science MCQs

Here’s a compact list of the most important basic organic chemistry reactions (just the reactions, no explanations): Combustion: C x H y + O 2 → C O 2 + H 2 O \text{C}_x\text{H}_y + O_2 \rightarrow CO_2 + H_2O Halogenation of Alkanes (Free Radical Substitution): CH 4 + C l 2 → h v CH 3 C l + H C l \text{CH}_4 + Cl_2 \xrightarrow{hv} \text{CH}_3Cl + HCl Hydrogenation of Alkenes: CH 2 = C H 2 + H 2  → N i / P t     C H 3 C H 3 \text{CH}_2=CH_2 + H_2 \xrightarrow{Ni/Pt} CH_3CH_3 Halogenation of Alkenes (Electrophilic Addition): CH 2 = C H 2 + B r 2 → B r C H 2 C H 2 B r \text{CH}_2=CH_2 + Br_2 \rightarrow BrCH_2CH_2Br Hydration of Alkenes: CH 2 = C H 2 + H 2 O → H + C H 3 C H 2 O H \text{CH}_2=CH_2 + H_2O \xrightarrow{H^+} CH_3CH_2OH Ozonolysis of Alkenes: RCH=CHR’ + O 3 → R C H O + R ′ C H O \text{RCH=CHR'} + O_3 \rightarrow RCHO + R'CHO Dehydration of Alcohols: CH 3 C H 2 O H → H 2 S O 4 , Δ           C H 2 = C H 2 + H 2...

Generated By Gemini Functional Group General Formula Suffix (as main group) Prefix (as substituent) Example from Methane Alkane R–H –ane – CH₄ → methane Alkene R–CH=CH–R –ene – CH₂=CH₂ → ethene Alkyne R–C≡C–R –yne – HC≡CH → ethyne Haloalkane R–X (X = F, Cl, Br, I) – fluoro-/chloro-/bromo-/iodo- CH₃Cl → chloromethane Alcohol R–OH –ol hydroxy- CH₃OH → methanol Ether R–O–R – alkoxy- CH₃–O–CH₃ → methoxyethane Aldehyde R–CHO –al formyl- HCHO → methanal (formaldehyde) Ketone R–CO–R –one oxo- CH₃–CO–CH₃ → propanone Carboxylic acid R–COOH –oic acid carboxy- HCOOH → methanoic acid Ester R–COOR′ –oate alkoxycarbonyl- HCOOCH₃ → methyl methanoate Acid halide R–COX –oyl halide halocarbonyl- CH₃COCl → ethanoyl chloride Amide R–CONH₂ –amide carbamoyl- CH₃CONH₂ → ethanamide Amine R–NH₂ –amine amino- CH₃NH₂ → methanamine Nitrile R–C≡N –nitrile cyano- CH₃CN → ethanenitrile Sulphonic acid R–SO₃H...

General science MCQs with Answers  1) Identify the vector quantity from the following : A) Heat B) Angular momentum  C) Time D) Work 2) Potassium permanganate is used to purify water as it is - A) Sterilizing  B) Oxidizing   C) Reducing  D) Leaching  3) Which can bind O₂ molecules? A) Red blood cells   B) White blood cells  C) Vitamin B₁₂ D) Vitamin E 4) LPG is a mixture of - A) Methane and butane  B) Propane and butane  C) Ethane and propane  D) Ethane and butane  5) Find the odd one out - A) Zoology  B) Physiology  C) Botany  D) Philosophy   6) The scale used for measuring the intensity of the earthquake is: A) Metric scale  B) Quake scale  C) Richter scale   D) Epicenter scale  7) Plants receive nutrients from - A) Atmosphere  B) Chlorophyll  C) Soil D) Light 8) Which one is a fertilizer? A) N₂ B) O₂ C) P₂ D) NaNO₃ 9) The speed of an ant is 75 cm/sec.The ant travels in a day ...