Category: HOTs

MULTIPLE CHOICE QUESTIONS (MCQ) (1 Mark) Question. Which process is generally used for the concentration of sulphide ores(a) Hydraulic Washing(b) Magnetic Separation(c) Froth Flotation(d) Distillation Question. Which reducing agent is employed to get copper from leached low grade copper ore.(a) N2(b) H2(c) Coke(d) CO Question. Silica is used as a flux in the extraction of Metals which is an example of(a) Basic(b) Neutral(c) Acidic(d) Amphoteric Question. Name […]

Question. Which of the following d-block element has half-filled penultimate as well as valence subshell?(a) Cu(b) Au(c) Ag(d) Cr Question. The correct order of EM2+/M values with negative sign for the four successive elements Cr, Mn, Fe and Co is(a) Fe > Mn > Cr > Co(b) Cr > Mn > Fe > Co(c) Mn > Cr […]

Question. Observe the given figure: Sanjeev performed this experiment with different solutions listed here :Sugar solution (I), salt solution (II), ink (III),milk (IV), glucose solution (V), muddy water (VI),slaked lime (VII).Tyndall cone can not be seen in(a) Only I, II and VII(b) I, IV and VIII(c) II, III and IV(d) I, II and V Question. Which […]

Assertion & Reasoning Based MCQs For question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.(a) Assertion and reason both are correct statements and reason is correct explanation for assertion.(b) Assertion and reason both are correct statements but reason is not correct explanation for […]

Question. When an aqueous solution of AgNO3 is electrolysed between platinum electrodes, the substances liberated at anode and cathode are(a) silver is deposited at cathode and O2 is liberated at anode(b) silver is deposited at cathode and H2 is liberated at anode(c) hydrogen is liberated at cathode and O2 is liberated at anode(d) silver is […]

Question. Isomerization of glucose produces(a) galactose(b) fructose(c) mannose(d) allose Question. Biomolecules are(a) aldehydes and ketones(b) acids and esters(c) carbohydrates, proteins and fats(d) alcohols and phenols Question. Which of the following is a disaccharide ?(a) Lactose(b) Starch(c) Cellulose(d) Fructose Question. Invert sugar is(a) chemically inactive form of sugar(b) equimolecular mixture of glucose and fructose(c) mixture of glucose and sucrose(d) a […]

Question. In the reaction, (a) NH3(b) N2(c) O2(d) CO2 Question. Amines behave as(a) lewis acids(b) lewis bases(c) aprotic acids(d) amphoteric compounds Question. What is the IUPAC name of the following compound ? (a) 2-methyl-4-hexanamine(b) 5-methyl-3-hexanamine(c) 2-methyl-4-amino hexane(d) 5-methyl-3-amino hexane Question. Which of the following statement is correct ?(a) Ammonia is more basic than methylamine.(b) Methylamine is more […]

Question. Vinegar is a solution of acetic acid which is :(a) 15 – 20%(b) 20 –25%(c) 6 – 8%(d) 2 – 4% Question. The correct order of increasing acidic strength is__________(a) Phenol < Ethanol < Chloroacetic acid < Acetic acid(b) Ethanol < Phenol < Chloroacetic acid < Acetic acid(c) Ethanol < Phenol < Acetic acid […]

Question. Sodium salt of benzene sulphonic acid on fusion with caustic soda gives(a) Benzene(b) Phenol(c) Thiophenol(d) Benzoic acid Question. Which of the following is dihydric alcohol ?(a) Glycerol(b) Ethylene glycol(c) Catechol(d) Resorcinol Question. Acid catalyzed hydration of alkenes except ethene leads to the formation of(a) primary alcohol(b) secondary or tertiary alcohol(c) mixture of primary and secondary alcohols(d) […]

CRITICAL THINKING TYPE QUESTIONS  Question. Which of the following statements is correct?(a) SN2 reactions of optically active halides are accompanied by inversion of configuration.(b) SN1 reactions of optically active halides are accompanied by racemisation.(c) Carbocation formed in SN1 reaction is sp2 hybridized.(d) All of the above.  Question. A compound is formed by substitution of two chlorine for […]