(1) The general formula of alkanones is
A. RCHO
B. RCOR'
C. RCOOH
D. RCOOR
(2) The constituent common to duralumin and alnico is
A. Co
B. Mn
C. Al
D. Mg
(3) The shape of the S-orbital is
A. elliptical
B. spiral
C. circular
D. spherical
(4) Aluminium hydroxide is used in the dyeing industry as a
A. dye
B. dispersant
C. salt
D. mordant
(5) The tincture of iodine means iodine dissolved in
A. ethanol
B. bromine chloride
C. chlorine water
D. water
(6) Temporary hard water is formed when rain water containing dissolved carbon(IV) oxide flows over deposits of
A. CaCO3
B. Na2CO3
C. Na2SO4
D. CaSO4
(7) The acid anhydride that will produce weak acid in water is
A. SO3
B. NO2
C. SO2
D. CO2
(8) The process that occurs when two equivalent forms of a compound are in equilibrium is
A. Isotopy
B. Resonance
C. Isomerism
D. Reforming
(9) In the laboratory preparation of ethyl ethanoate, the water present in the mixture is removed using ?
A. Anhydrous CaCl2
B. concentrated NaCO4
C. dilute NaOH
D. concentrated H2SO4
(10) The constituent of air necessary in the rusting process are
A. O2 and H2O
B. Ar and CO2
C. CO2 and H2O
D. O2 and CO2
(11) For a general equation of the nature xP + yQ → mR + nS, the expression for the equilibrium constant is
A. k [P]x [Q]y
B.
[P]x[Q]y
[R]m[S]n
C.
[R]m[S]n
[P]x[Q]y
D.
m[R]n[S]
x[P]y[Q]
(12) A given mass of gas occupies 2dm3 at 300k. At what temperature will its volume be doubled, keeping the pressure constant?
A. 400k
B. 480k
C. 550k
D. 600k
(13) The oxidation number of iodine in KIO3 is
A. +7
B. +3
C. +5
D. +6
(14) An isomer of C5H12 is
A. 2–ethyl butane
B. butane
C. 2–methyl butane
D. 2–methyl propane
(15) When few drops of concentrated trioxonitrate(V) acid is added to an unknown sample and wanned an intense yellow colouration is observed. The likely functional group present in the sample is
A. NH2RCHCOOH
B. CHO
C. CO
D. CNH2
(16) A sample of orange juice is found to have a PH of 3.80. What is the concentration of the hydroxide ion in the juice?
A. 1.6 × 10-4
B. 6.3 × 10-11
C. 6.3 × 10-4
D. 1.6 × 10-11
(17) Incomplete oxidation of ethanol yields
A. CH3COOH
B. CH3COCH3
C. CH3CH2OCH2CH3
D. CH3CHO
(18) The salt formed from a weak acid and a strong base hydrolyzes in water to form
A. A saturated solution
B. an acidic solution
C. a buffer solution
D. an alkaline solution
(19) The ideal gas laws and equations are true for all gases at
A. low pressures and lower temperatures
B. low temperatures and high pressures
C. high pressures and high temperatures
D. low pressure and high temperatures
(20) When ΔH is negative, a reaction is said to be
A. endothermic
B. exothermic
C. reversible
D. ionic
(21)
22688Ra → x86Rn + alpha particle
A. 226
B. 220
C. 227
D. 222
(22) The shape of ammonia molecules is
A. trigonal planar
B. octahedral
C. square planar
D. tetrahedral
(23) The mass of silver deposited when a current of 10A is passed through a solution of silver salt for 4830s is – (Ag = 108 F = 96500(mol-1)
A. 54.0g
B. 27.0g
C. 13.5g
D. 108.0g
(24) Tin is unaffected by air at ordinary temperature due to its
A. Low melting point
B. Weak electropositive character
C. High boiling point
D. White lustrous appearance
(25) Calculate the amount in moles of silver deposited when 9650C of electricty is passed through a solution of silver salt [= 96500 Cmol-1]
A. 0.05
B. 10.80
C. 10.00
D. 0.10
(26) The reaction of halogens with alkanes in the presence of sunlight is an example of
A. oxidation reaction
B. addition reaction
C. hydrogenation reaction
D. substitution reaction
(27) The enzyme used in the hydrolysis of starch to dextrin and maltose is?
A. lipase
B. amylase
C. invertase
D. zymase
Thanks for Reading!!!
0 Comments