chemistry MCQs – Page 48

Practise multiple-choice questions from chemistry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemistry Mcqs
941. Sabatier Senderns reaction involve _____________ in presence of Ni?
comments icon0

A. alkyne & Cl2

B. Aalkene & H2

C. alkene & O2

D. alkene & N2

942. Which of the halogen has highest electronegativity ?
comments icon0

A. Iodine

B. Fluorine

C. Bromine

D. Chlorine

943. Which one is not a nucleophile ?
comments icon0

A. C2H5O-

B. H3C+

C. NH3

D. SCN-

944. General formula of alkyne is______________?
comments icon0

A. CnH2n

B. CnH2n + 2

C. CnH2n + 2

D. CnH2n 2
945. Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?
comments icon0

A. carbonic acid

B. methanol

C. methanol

D. methane

946. The relatively high energy of the gauche conformation of butane is primarily associated with_________?
comments icon0

A. Torsional strain

B. Steric strain

C. Angle strain

D. Orbital strain

947. When alcohol reacts with phosphorous halides it geive____________________?
comments icon0

A. alkanes

B. alkyl halides

C. alkyl amine

D. alkynes

948. Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?
comments icon0

A. tertiary alcohol

B. secondary alcohol

C. dihydric alcohol

D. primary alcohol
949. The purpose of Smelting an ore is to________?
comments icon0
A. Reduce it

B. Oxidize it

C. Separate volatile impurities

D. Obtain an alloy

950. The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________?
comments icon0
A. Cone. HCI and anhydrous ZnCl2

B. Cone. HCI and anhydrous CaCl2

C. Cone. HCI and anhydrous PCl2

D. Cone. HCI and anhydrous SOCl2

951. Grignard reagent is reactive due to___________________?
comments icon0

A. the presence of halogen atom

B. the polarity of C-Mg bond

C. all

D. the presence of magnesium atom

952. Which one of the following is the weakest acid in water__________________?
comments icon0

A. HBr

B. HCI

C. HF

D. HI

953. The oxidation of isopropyl alcohol will yield___________________?
comments icon0
A. Propanone

B. Propanol

C. Propanoic acid

D. propane

954. When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________?
comments icon0

A. propanal

B. propanoic acid

C. propanol

D. propane

955. Which is the strongest acid ?
comments icon0

A. HCIO2

B. HCIO3

C. HCIO

D. HCIO4
956. FeSO4 forms brown ring with________________?
comments icon0
A. NO

B. N2O3

C. N2O

D. NO2

957. Which of the halogen can displace other three elements ?
comments icon0

A. Bromine

B. Flourine

C. Iodine

D. Chlorine

958. The O-O linkage is present in__________?
comments icon0

A. H2S4O6

B. H2S2O3

C. H2SO8

D. H2 S2 O6

959. In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________?
comments icon0
A. Double

B. Half

C. Four times

D. Same

960. The molecular formula for cholesterol is C27 H46 O. What are the degrees of unsaturation for this compound?
comments icon0

A. 7

B. 6

C. 5

D. 8