Chemistry MCQs (Intermediate) 166 Welcome to Shaheen Leader Academy We expect 100% result. Click on Start Button. Your time is Ended. Thanks Chemistry (Intermediate) Quiz 1 / 25 a ≠b ≠c, α ≠β ≠γ ≠90° is representation of crystal system:- Monoclinic Trigonal Hexagonal Triclinic 2 / 25 In group V-A the most electronegative element is:- N Sb P As 3 / 25 The first acid known to man was Nitric acid Sulphuric acid Acetic acid Hydro chloric acid 4 / 25 The oxidation number of chromium In K₂Cr₂O₇ is +14 +6 +2 +7 5 / 25 Absolute zero is equal to:- -273.15 °C -237.15 °C -273.15 K 273.15 °C 6 / 25 Benzene is stable than ethene because it has:- more sigma bonds More pi-bonds delocalized pi-electrons localized pi-electrons 7 / 25 Ketones on reduction produce:- primary alcohol none Secondary alcohol tertiary alcohol 8 / 25 _____ reacts with H2 in dark:- Cl2 F2 I2 Br2 9 / 25 The benzene ring is oxidized to maleic anhydride when strongly heated with:- V2O5/450°C Cd/450°C Pt/450°C Ni/450°C 10 / 25 Which is correct about atomic emission spectroscopy:- All of the above Both a,b The sources of excitation influences the intensity of emission The source provides energy to vaporise the sample 11 / 25 In β- elimination reaction, nucleophile attacks on:- β-hydrogen α-carbon α-hydrogen hydrogen 12 / 25 Which is used at the tip of the match sticks:- Sb2S3 K2Cr2O7 + S + K K2Cr2O7 + S + White P S and K 13 / 25 The technique which measures the reflectance of a solution is called:- Differential Spectrophotometry Reflectance Spectrophotometry Spectrophotometry Simultaneous Spectrophotometry 14 / 25 Which of the following gas is more ideal at STP:- NH3 SO2 H2 H2S 15 / 25 Which of the following is the weakest acid:- phenol water carboxylic acid alcohol 16 / 25 Which one is used for etching of glass:- HI HBr HCl HF 17 / 25 The component which shows maximum affinity for stationary will have:- Small Rf value Large Rf value Intermediate Rf value None of above 18 / 25 Which has zero dipole moment:- 1-butene cis 2-butene trans 2-butene 2-methyl 1-propane 19 / 25 Which is not a derivative of NH3:- Phenyl hydrazine Picric acid Hydrazine Aniline 20 / 25 ____ don't give cannizzaro's reaction:- benzealdehyde Formaldehyde Acetaldehyde None of the above 21 / 25 Calcium sulphaide has water of crystallization 2 5 24 4 22 / 25 At equilibrium the rate of forward and reverse reaction becomes : Greater Normal Lesser Equal 23 / 25 Atomic size of sodium atom is: 197,99pm 160,65pm 998pm 186,102pm 24 / 25 In the cement manufacture, the digestor revolves at R.P.M:- 2.5 3.5 2 3 25 / 25 CH₃-O_CH₃ is called ___? Diethyl ether Ethyl methyl ether Dimethyl ether Propyl ether Your score is LinkedIn Facebook Twitter VKontakte Restart quiz Apply Here for Online Registration Contact For any query please call at +92-3332225389 Facebook-f Twitter Google-plus-g Instagram Dribbble Youtube