821 Which of the following will have the highest boiling point ? Chemistry Medium Full question → A methanol B ethanal C propanal D hexanone
822 Iodoform test can be used to distinguish between_________________? Chemistry Medium Full question → A ethanol and methanol B acetaldehyde and methanal C acetone and diethyl ketone D all of the above
823 Cannizaros reaction takes place through the transfer of ____________________ from complex anion? Chemistry Medium Full question → A hydrogen ion B hydride ion C oxide ion D methoxide ion
824 Dry distillation of calcium acetate results in the formation of_________________? Chemistry Medium Full question → A formaldehyde B acetaldehyde C methane D acetone
825 Tetrahydroborate ion is the source of_______________? Chemistry Medium Full question → A proton B H+ C both A & amp; B D H-
826 Acetal on acid hydrolysis generates__________________? Chemistry Medium Full question → A Alcohol B Ketone C Both A & B D None of the above
827 Ncleophilic addition reactions are catalysed__________________? Chemistry Medium Full question → A Acid B Base C Both A and B D None
828 Oxidation of primary alcohol gives________________? Chemistry Medium Full question → A ketone B Aldehyde C Alkene then – COOH D Ester
829 Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide ? Chemistry Medium Full question → A carbonic acid B ethanol C acetic acid D methanoic acid
830 Which of the following will not give addition reaction with NaHSO3________________? Chemistry Medium Full question → A HCHO B CH3CHO C CH3-CH2-CHO D None of the above
831 Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________? Chemistry Medium Full question → A As nitrometer B To remove air bubbles from molten metal C To produce alloy D As insulator
832 Orthoboric acid is 2.6% soluble in water at 40?C and ___________at 107°C. Chemistry Medium Full question → A 26% B 27% C 37% D <2.6%
833 In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen? Chemistry Medium Full question → A 4 B 2 C 1 D 6
834 Which electronic configuration corresponds to an element of group IIIA ? Chemistry Medium Full question → A 1s2 2s2 2p3 B 1s2 2s2 2p6 3s2 3p1 C 1s2 2s2 2p4 D 1s2 2s2 2p6 3s2 3p6 4s2 3d1
835 Aluminium oxide is_________________? Chemistry Medium Full question → A Acidic oxide B Basic oxide C Amphoteric oxide D It does not exists
836 Special features of borate glass is that it is_________________? Chemistry Medium Full question → A Heat resistant B Low melting C Used to prepare chemical garden D Green in colour
837 Borax is a white crystalline solid and it is_________________? Chemistry Medium Full question → A More soluble in cold water B More soluble in hot water C Insoluble in water D Soluble only in organic solvents
838 One of the outstanding features of boron is its ability to form__________________? Chemistry Medium Full question → A Molecular addition compounds B Molecular crystals C Semiconductors D Ionic compounds
839 Boron is non-netal whereas A1 is metal. It is due to_______________________? Chemistry Medium Full question → A Small size B High nuclear charge C Both A and B D No authorized justification yet
840 Ozonolysis of benzene produces___________________? Chemistry Medium Full question → A Glycol B Glyoxal C Vicinal diol D Both B & C