Chemistry MCQS

891. Isotopes differ in?
(A) Arrangement of electrons in orbitals
B. Properties which depend on mass
(C) Chemical properties
(D) Extent to which they may be affected by an electromagnetic field

892. Molecular ions are produced by?
(A) Beam of electrons
(B) Radio waves
(C) Alpha rays
D. Both A & C

893. 98g of H2SO4 contains?
A. 3 moles of ions
(B) 2 moles of ions
(C) 1 mole of ions
(D) 4 moles of ions

894. Which of the following terms is not used for ionic compounds?
A. Molecular formula
(B) Formula mass
(C) Empirical formula
(D) Formula unit

895. Acetaldehyde cyanohydrin on acid hydrolysis yields___________________?
A. Tartaric acid
B. Propanoic acid
C. Lactic acid
D. Valeric acid

896. Which one exhibits aldol condensation____________________?
A. HCHO
B. C6H5CHO
C. Cl3CCHO
D. CH3COCH3

897. Which of the following is a symmetrical ketone___________________?
A. 3 – hexanone
B. Acetone
C. Butanone
D. 2-pentanone

898. In the base-catalyzed reaction of carbonyl compounds, the catalyst___________________?
A. Increases the nucleophilic character of the reagent
B. Increases the electrophilic character of the carbonyl compound
C. Acidic character of reagent
D. Both A and B

899. A elements are named as alkali metals because_______________?
A. Their oxides are basic
B. Their oxide and hydroxides are water-soluble
C. Both A & B
D. They are found in the earth

900. Formula of Chile saltpetre is__________________?
A. NaNO3
B. CaCO3
C. Ba(NO3)2
D. NH4Cl